Abstract: A metallized dielectric waveguide filter includes an upper metallized dielectric waveguide having a plurality of upper resonant cavities, the upper metallized dielectric waveguide comprising an upper dielectric block having metallized outer walls, and a lower metallized dielectric waveguide having a plurality of lower resonant cavities, the lower metallized dielectric waveguide comprising a lower dielectric block having metallized outer walls. A first of the upper resonant cavities is operatively connected to a first of the lower resonant cavities via at least one coupling window. A first slot having metallized walls is provided in a portion of the upper dielectric block that is part of the first of the upper resonant cavities.

Abstract: A cross-coupled filter includes a resonant structure including a plurality of columns of resonant units, each column of resonant units includes at least two resonators. A dominant coupling mode of a coupling between two adjacent resonators in a same column is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two adjacent resonators in the same column alternate between electrical coupling and magnetic coupling. A dominant coupling mode of a coupling between two adjacent resonators in adjacent columns is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two resonators of two adjacent columns alternate between electrical coupling and magnetic coupling, to form at least a set of cross-coupling. The present disclosure realizes miniaturization and light weight in structural characteristics, and realizes low loss and good harmonic characteristics in electrical performance.

Abstract: Waveguides and methods for manufacturing a waveguide that include forming a first channel in a first layer of dielectric material, the first channel comprising one or more walls; forming a second channel in a second layer of dielectric material, the second channel comprising one or more walls; depositing electrically conductive material on the one or more walls of the first channel; depositing electrically conductive material on the one or more walls of the second channel; arranging the first layer adjacent to the second layer to form a stack with the first channel axially aligned with and facing the second channel; and heating the stack so that the conductive material on the one or more walls of the first channel and the conductive material on the one or more walls of the second channel connect to form the waveguide.

Abstract: A transmission line in which a waveguide tube and a planar transmission path are coupled to a post-wall waveguide broadens a band in which return loss is small. A transmission line (1) includes: a PPW (filter 11) including wide walls (13, 14) and narrow walls (16); and a waveguide tube (21). The PPW (filter 11) includes a columnar conductor (pin 18) that passes through an opening (13a) which is provided in the wide wall (conductor layer 13) and that has one end portion (181) located inside the substrate (12). The waveguide tube (21) is placed such that the columnar conductor (pin 18) passes through an opening (22a) and such that another end portion (182) of the columnar conductor (pin 18) is located inside the waveguide tube (21).

Abstract: A dual-mode dielectric resonator using two dissimilar modes is described, the dissimilar modes supported by a ridge waveguide resonator and a ¼-wavelength (¼?) metalized cylindrical resonator within a single, metal-coated dielectric block. Each ridge waveguide resonator and cylindrical resonator form a dual-mode resonator pair. Coupling control posts set between the ridge waveguide resonator and cylindrical resonator can adjust their coupling. Multiple pairs of ridge waveguide/cylindrical resonators are fabricated in the same dielectric block to form a coupled resonator bandpass filter, including an 8-pole or 10-pole dielectric resonator filter, for 5G or other applications. Transmission zeros can be introduced by a metalized blind hole extending vertically between two ridge waveguide resonators or a microstrip extending between two dual-mode resonator pairs between which there exists no partial-width or full-width dielectric window.

Abstract: An iris bridge for coupling two radio frequency resonators includes: a body of dielectric material having an exposed first surface area, having a predetermined length, width and thickness, and having an elongate shape along the length of the body; a hole disposed through the body along the width of the body, the hole having a wall forming a second surface area of the body; and a conductive coating covering the exposed first surface area of the body and a first portion of the second surface area of the body. A second portion of the second surface area is free of conductive coating forming a non-conductive section of the wall of the hole. Such bridge may be tuned for coupling radio frequency resonators.

Abstract: A bandpass filter has a plurality of resonant cavities. The plurality of resonant cavities are arranged into a sequence of adjacent resonant cavities. Each resonant cavity is configured to define the same fundamental resonant frequency. The filter includes a plurality of coupling irises, with one of the coupling irises positioned between each pair of adjacent resonant cavities. Each resonant cavity includes a plurality of cavity sections. Each resonant cavity includes a capacitive iris positioned coupling the cavity sections to one another. The frequency of secondary resonance modes varies amongst the resonant cavities in the plurality of resonant cavities.

Abstract: A group delay compensation filter includes: a waveguide that has a first slot and that is configured to transmit a signal; and a first dielectric resonator that includes: a first dielectric, a first metal layer formed over a surface of the first dielectric, and a first opening provided in the first metal layer, wherein the first dielectric resonator is in contact with the waveguide with the first opening coupled to the first slot, and wherein the first dielectric resonator is configured to compensate group delay in a first frequency band of the signal.

Abstract: Provided is a cavity filter that is one of radio frequency filters. The cavity filter includes a printed circuit board (PCB) substrate including a micro band layer, metal layers for grounding, which are arranged on both surfaces of the PCB substrate, having the micro band layer interposed therebetween, a plurality of standard cavity modules which are arranged on the both surfaces of the PCB substrate, in each of which an open side surface is fixed and sealed onto the metal layer, and a plurality of coupling windows, in each of which a part of the metal layer for grounding is removed to expose a part of the PCB substrate.

Abstract: A method for equalizing the distortion caused by losses in couplings in a microwave filter comprising the steps of: designing an initial transfer function of a filter; calculating the poles pi of said designed transfer function; modifying the values of said poles pi with a predetermined amount ai, so as to produce an asymmetric displacement of the poles along the real axis of the complex plane, said predetermined amount ai being calculated as a function of a quality factor Qk of couplings between resonators that said microwave filter is made of; and calculating a modified transfer function from said initial transfer function and said modified poles pi-ai.

Abstract: An apparatus includes a top conductive layer of on an integrated circuit waveguide filter and a bottom conductive layer. The top and bottom conductive layers are coupled via a plurality of couplers that form an outline of the waveguide filter. A dielectric substrate layer is disposed between the top conductive layer and the bottom conductive layer of the integrated circuit waveguide filter. The dielectric substrate layer has a relative permittivity, ?r that affects the tuning of the integrated circuit waveguide filter. At least one tunable via includes a tunable material disposed within the dielectric substrate layer and is coupled to a set of electrodes. The set of electrodes enable a voltage to be applied to the tunable material within the tunable via to change the relative permittivity of the dielectric substrate layer and to enable tuning the frequency characteristics of the integrated circuit waveguide filter.

Abstract: A filter includes a top panel, a bottom panel, two first side panels located between the top panel and the bottom panel, and at least one diaphragm that has a metal surface. The two first side panels, the top panel and the bottom panel form a rectangular waveguide. The at least one diaphragm is connected to both the top panel and the bottom panel and separates a cavity of the rectangular waveguide into several cavity chambers that extend along an input/output direction of the rectangular waveguide. At least one of the first side panels is an adjustable side panel whose position relative to the diaphragm is adjustable.

Abstract: [Technical problem] A conventional dielectric waveguide input/output structure has a strength of coupling which is adjusted by a length of an input/output electrode. However, there is a limitation in an adjustable range of the coupling, which makes it impossible to have an input/output structure with wider bandwidth. [Solution to the technical problem] A dielectric waveguide input/output structure is provided, which comprises an input/output point provided near the center on one side of a bottom surface of a rectangular parallelepiped-shaped dielectric body, wherein an outer periphery of the dielectric body is covered with an electrically conductive film, except for an L-shaped lateral part extending along an edge of the bottom surface from opposite sides of the input/output point and for a surrounding part of the input/output point in a lateral surface with which the input/output point is in contact.

Abstract: A dielectric waveguide filter comprising a block of dielectric material including a plurality of resonators defined by a plurality of slots defined in the block of dielectric material. The resonators are arranged on the block of dielectric material in one or more rows and columns. First and second RF signal input/output electrodes are defined on the block of dielectric material. A first direct RF signal transmission path for the transmission of an RF signal is defined by the first and second RF signal input/output electrodes and the plurality of resonators. In one embodiment, internal windows define a first direct RF signal transmission means and additional RF signal transmission means define alternate or cross-coupling paths for the transmission of the RF signal from resonators in one column to resonators in another column. In one embodiment, the filter is comprised of two separate blocks of dielectric material which have been coupled together.

Abstract: This invention provides novel combline resonators with multiple conductors and multiple dielectrics for compact filters and multiplexers with improved electric response. The novel combline resonator consists of multi-conductors being made up for the simplest case of an inner metallic post, an intermediate conductor, and an enclosure. This structure provides two resonant modes that can be used for realizing compact microwave filters and multiplexers. Such filters offer the low cost, compact size and ease of manufacturing features of traditional combline resonator filters, with additional size reduction due to the fact that a single physical cavity provides two electrical resonators. In addition, the new cavity inherently introduces a transmission zero in the guard-bands enhancing the filter selectivity.

Abstract: A multi-mode filter for realizing wide band using capacitive coupling and inductive coupling and capable of tuning coupling value is disclosed. The multi-mode filter includes a housing; a first cavity and a second cavity formed in the housing; a first resonator located in the first cavity, a second resonator located in the second cavity, a wall configured to separate the first cavity from the second cavity; and a first coupling element, wherein a groove is formed between the housing and the wall, the first coupling element is inserted in the groove in crossing direction to the wall, one part of the first coupling element is disposed in the first cavity, another part of the first coupling element is disposed in the second cavity, and the first coupling element is connected to a ground.

Abstract: A dielectric waveguide filter which, in one embodiment, is comprised of a plurality of monoblocks coupled together in a side-by-side relationship. In one embodiment, the waveguide filter includes two end monoblocks and two interior monoblocks each defining two resonators. First and second RF signal input/output electrodes are defined on the two end monoblocks. In one embodiment, a direct RF signal transmission path is defined in part by the combination of the resonators, RF signal transmission bridges on each of the monoblocks that interconnect the resonators on each of the monoblocks, and RF signal transmission windows between and interconnecting the resonators of adjacent monoblocks. In one embodiment, alternate or cross-coupling RF signal transmission paths are defined by external RF signal transmission lines that extend between adjacent monoblocks.

Abstract: A dielectric waveguide filter comprising a block of dielectric material covered with an exterior layer of conductive material. A plurality of stacked resonators are defined in the block of dielectric material by one or more slots in the block of dielectric material and an interior layer of conductive material that separates the stacked resonators. First and second RF signal transmission windows in the interior layer of conductive material provide for both direct and cross-coupling RF signal transmission between the stacked resonators. In one embodiment, the waveguide filter is comprised of separate blocks of dielectric material each covered with an exterior layer of conductive material, each including one or more slots defining a plurality of resonators, and coupled together in a stacked relationship.

Abstract: A waveguide filter comprising a base block of dielectric material defining at least first and second resonators and a bridge block seated on top of the base block and defining at least a third resonator. In one embodiment, the base block comprises first and second base blocks that have been coupled together in an end to end relationship. An external transmission line or an interior RF signal transmission window or an RF signal transmission bridge provides a cross-coupling RF signal transmission path between the first and second resonators. At least first and second interior RF signal transmission windows provide a direct RF signal transmission path between the first and third resonators and the second and third resonators respectively.

Abstract: A method of tuning the frequency of a waveguide filter including the step of removing dielectric material from one or both of the first and second opposed exterior side surfaces of the waveguide filter to cause a change in the center frequency of the waveguide filter. In one embodiment, dielectric material is removed from one or both of the first and second opposed exterior side surfaces of the waveguide filter in unequal amounts wherein the tuned waveguide filter includes first and second slits defined in the respective first and second opposed exterior side surfaces which extend unequal first and second distances into the body of the waveguide filter.

Abstract: A dielectric waveguide filter comprising a block of dielectric material including a plurality of resonators defined by a plurality of slots defined in the block of dielectric material. The resonators are arranged on the block of dielectric material in one or more rows and columns. First and second RF signal input/output electrodes are defined on the block of dielectric material. A first direct RF signal transmission path for the transmission of an RF signal is defined by the first and second RF signal input/output electrodes and the plurality of resonators. In one embodiment, internal windows define a first direct RF signal transmission means and additional RF signal transmission means define alternate or cross-coupling paths for the transmission of the RF signal from resonators in one column to resonators in another column. In one embodiment, the filter is comprised of two separate blocks of dielectric material which have been coupled together.

Abstract: A coupling is provided for coupling non-adjacent resonators of a radio frequency filter. The coupling joins together non-adjacent resonators with a metal strip. The metal strip is physically connected to but electrically isolated from resonators located between the connected non-adjacent resonators. The metal strips include tabs the length of which may be varied. The coupling works with different resonator configurations including horizontally aligned resonators. The coupling allows for the jumping of an even number of resonators can produce zeros at high and low bands. A single coupling of this configuration enables two negative couplings.

Abstract: A waveguide filter comprising a base block of dielectric material defining at least first and second resonators and a bridge block seated on top of the base block and defining at least a third resonator. In one embodiment, the base block comprises first and second base blocks that have been coupled together in an end to end relationship. An external transmission line or an interior RF signal transmission window or an RF signal transmission bridge provides a cross-coupling RF signal transmission path between the first and second resonators. At least first and second interior RF signal transmission windows provide a direct RF signal transmission path between the first and third resonators and the second and third resonators respectively.

Abstract: A waveguide band-pass filter is disclosed comprising: an input/output gate for a signal; a first inductive discontinuity coupling device; a second inductive discontinuity coupling device and a first waveguide resonator segment coupled to said input/output gate and interposed between the first and the second coupling devices. At least one of the first and the second coupling devices includes at least a resonant coupling structure which extends in the waveguide with a reduced height relative to a height of the first resonator segment and it is shaped for inputting a zero in a transmission frequency response of the filter.

Abstract: A frequency-tunable microwave bandpass filter including a wave guide having a rectangular cross-section and including a stationary first conductive portion I and a movable second conductive portion II. The first portion includes first conductive partitions having one or more conductive obstacles related to complementary openings in the section of the guide that forms capacitive irises. The first partitions are transversely mounted, at the propagation of the wave in the guide, define cavities in the longitudinal direction of the guide, are rigidly connected to the first portion and the second conductive partitions that have one or more openings defining capacitive irises, and, in combination with the adjacent guide lengths, form immitance inverters. The first partitions form a series of resonating cavities coupled by the immitance inverters. A means ensures electrical contact between the conductive portions I and II.

Abstract: A multi-cavity RF filter has at least one electrically conductive coupling probe disposed between two resonator cavities. The coupling probe is provided with an ESD protective arrangement such that the coupling probe is electrically connected to a metallic housing of the RF filter only by the ESD protective arrangement. The ESD protective arrangement is configured to provide (i) a low resistance electrical path from the coupling probe to the metallic housing and (ii) a high impedance to RF energy having wavelengths proximate to a center frequency wavelength of the RF filter.

Abstract: A TE011 cavity filter assembly is disclosed. The system includes at least one resonator operating in TE011 mode having a resonant frequency. The at least one resonator may include a cavity comprising an inner diameter and a cavity length. The at least one resonator may also include a first metal disc inside the cavity. The first metal disc may include a disc diameter and a void in the metal disc, which includes a void diameter and a void depth. The inner diameter of the cavity may be greater than the disc diameter creating a gap with a gap width and a gap depth. The TE011 cavity filter assembly may further include positive coupling.

Abstract: A tunable band-pass filter includes: a rectangular waveguide including a first and a second waveguide parts, which are acquired by dividing the rectangular waveguide along an E-plane of the rectangular waveguide at a center position of an H-plane in the rectangular waveguide; a metal plate sandwiched by the first and the second waveguide parts in such a way as to be parallel to the E-plane; at least one dielectric plate arranged in the rectangular waveguide in such a way as to extend in a longitudinal extension direction of the metal plate; and a drive mechanism changing a relative position relationship between the dielectric plate and the metal plate from the outside.

Abstract: An integrated cavity filter/antenna system includes a substrate, a cavity filter formed in or on the substrate. A first cavity resonator is in or on the substrate that is enclosed by metal walls. At least a second cavity resonator is formed in or on the substrate that is enclosed by metal walls. An inter-resonator coupling structure couples energy between the first cavity resonator and the second cavity resonator. An antenna is integrated with one of the cavity resonators so that the antenna acts as both a port of the cavity filter and as a radiating element for the filter/antenna system. A connector is coupled to one of the cavity resonators for coupling energy into the filter/antenna system.

Abstract: A dielectric waveguide filter which, in one embodiment, is comprised of a plurality of monoblocks coupled together in a side-by-side relationship. In one embodiment, the waveguide filter includes two end monoblocks and two interior monoblocks each defining two resonators. First and second RF signal input/output electrodes are defined on the two end monoblocks. In one embodiment, a direct RF signal transmission path is defined in part by the combination of the resonators, RF signal transmission bridges on each of the monoblocks that interconnect the resonators on each of the monoblocks, and RF signal transmission windows between and interconnecting the resonators of adjacent monoblocks. In one embodiment, alternate or cross-coupling RF signal transmission paths are defined by external RF signal transmission lines that extend between adjacent monoblocks.

Abstract: A multi-pole filter antenna may include aperture-coupled non-dominant mode cavity resonators, and an aperture-coupled dominant mode patch antenna. The filter antenna may be implemented in a multilayer printed circuit board or similar structure. The filter antenna may for example operate in the Ku-Band, the Ka-Band, the C-Band, or another band.

Abstract: A multi-band filter is disclosed which includes an input manifold; an output manifold; and a plurality of filters connected in parallel between the input manifold and output manifold. The filters have a first section proximal to the input manifold which is matched to the input manifold and a second section proximal to the output manifold which is matched to the output manifold.

Abstract: A structure and method for adjusting the bandwidth of a ceramic waveguide filter comprising, in one embodiment, a monoblock of dielectric ceramic material defining respective steps and respective input/output through-holes extending through the monoblock and the respective steps. In one embodiment, the steps are defined by notches in the monoblock and the input/output through-holes define openings terminating in the notch. The bandwidth of the ceramic waveguide filter may be adjusted by adjusting the height/thickness and direction of the steps relative to an exterior surface of the monoblock and/or the diameter of the input/output through-holes.

Abstract: An electronic product includes a case; a first board placed inside the case; and a second board having an Electromagnetic Band Gap (EBG) structure inserted therein. The second board is coupled to an inside of the case facing the first board so as to shield a noise radiated from the first board.

Abstract: The invention relates to a multi port router device capable of carrying a number P, which is greater than or equal to three, of frequency channels, from a number M of input ports to a number N of output ports, at least one of the two numbers M and N being greater than or equal to two, characterised in that it includes at least two filters (12, 14, 16, 18), each filter comprising at least two coupled resonators, at least one resonator (Rs1, Rs2) being common to two different filters, and each input port and each output port being connected directly to at least one resonator.

Abstract: A dielectric waveguide filter comprising a block of dielectric material covered with an exterior layer of conductive material. A plurality of stacked resonators are defined in the block of dielectric material by one or more slots in the block of dielectric material and an interior layer of conductive material that separates the stacked resonators. First and second RF signal transmission windows in the interior layer of conductive material provide for both direct and cross-coupling RF signal transmission between the stacked resonators. In one embodiment, the waveguide filter is comprised of separate blocks of dielectric material each covered with an exterior layer of conductive material, each including one or more slots defining a plurality of resonators, and coupled together in a stacked relationship.

Abstract: A microwave cavity filter is configured for operation in the dual TE22N mode to realize a very high Q factor at very high frequency ranges. The microwave filter is formed from using one or more cylindrical cavities in which two orthogonal field polarizations of the TE22N mode are excited and coupled together by means of a coupling element. Different combinations of inter-cavity irises provide for both direct and cross-coupling of aligned field polarizations in adjacent cavities, as required, to realize complex filter functions. The irises may be formed in either a side or end wall of the cavities for both collinear and planar mount configuration. Negative mode coupling also allows for transmission zeros to be realized on either side of the filter passband.

Abstract: A filter circuit having two pass bands includes first and second bandpass filters which are connected in parallel with each other. Each of the bandpass filters includes at least a resonator group composed of a plurality of resonators arranged in orderly sequence so as to be coupled to each other to form a pass band, an input terminal coupled to a resonator on an input stage, and an output terminal coupled to a resonator on an output stage. The resonator group is composed of at least one of one or more quarter-wavelength resonators and one or more half-wavelength resonators. The resonator group of at least one of the first bandpass filter and the second bandpass filter includes both one or more quarter-wavelength resonators and one or more half-wavelength resonators.

Abstract: The invention concerns a waveguide filter (200NP) for microwaves, characterized in that it has, at least on part of its length, a cross-section having two mutually non-parallel opposite sides (111, 111?), for example trapezoid. The use of such a shape enables the power threshold for forming self-maintained electron avalanche discharges to substantially increased and satisfactory filtering properties to be obtained. The invention also concerns the use of such a filter in a high-power microwave transmitter operating in X and Ka bands, in particular for space applications.

Abstract: A system including a first dielectric filter including a plurality of resonators, a second dielectric filter including a plurality of resonators, and a hollow waveguide configured to receive the first dielectric filter or the second dielectric filter by separating the hollow waveguide into at least a first part and a second part. A width of the plurality of resonators matches a width of a groove within the hollow waveguide to allow insertion of the first dielectric filter or the second dielectric filter into the hollow waveguide where sides of the resonators are in contact with inner sides of the groove of the hollow waveguide. Another embodiment of a system and a method are also disclosed.

Abstract: A waveguide band-pass filter is disclosed comprising: an input/output gate for a signal; a first inductive discontinuity coupling device; a second inductive discontinuity coupling device and a first waveguide resonator segment coupled to said input/output gate and interposed between the first and the second coupling devices. At least one of the first and the second coupling devices includes at least a resonant coupling structure which extends in the waveguide with a reduced height relative to a height of the first resonator segment and it is shaped for inputting a zero in a transmission frequency response of the filter.

Abstract: Superconducting rf is limited by a wide range of failure mechanisms inherent in the typical manufacture methods. This invention provides a method for fabricating superconducting rf structures comprising coating the structures with single atomic-layer thick films of alternating chemical composition. Also provided is a cavity defining the invented laminate structure.

Abstract: The present invention relates to a transition arrangement comprising a first surface-mountable waveguide part, a second surface-mountable waveguide part and a dielectric carrier material with a metalization provided on a first main side. Each of the first and second surface-mountable waveguide parts comprises a first wall, a second wall and a third wall, which second and third walls are arranged to contact a part of the metalization, where the first and second surface-mountable waveguide parts are arranged to be mounted on the dielectric carrier material in such a way that the first and second surface-mountable waveguide parts comprise ends which are positioned to face each other. The transition arrangement further comprises an electrically conducting sealing frame that is arranged to be mounted over and covering the ends, where the electrically conducting sealing frame has a first wall, a second wall and a third wall, where the second and third walls are arranged to contact a part of the metallization.

Abstract: A printed circuit board and an electronic product are disclosed. In accordance with an embodiment of the present invention, the printed circuit board includes a first board, which has an electronic component mounted thereon, and a second board, which is positioned on an upper side of the first board and covers at least a portion of an upper surface of the first board and in which an EBG structure is inserted into the second board such that a noise radiating upwards from the first board is shielded. Thus, the printed circuit board can readily absorb various frequencies, be easily applied without any antenna effect and be cost-effective in manufacturing.

Abstract: A filter includes: a container; at least one barrier, an input device and an output device. The at least one barrier divide the space of the container into at least two resonant cavities. Each resonant cavity has a harmonic oscillator disposed therein. The harmonic oscillators includes a supporter and a carbon nanotube structure disposed on a surface of the supporter.

Abstract: An oscillator device manufacturing method includes: placing an oscillator provided with electrodes on a convex pedestal provided on an assembly table; arranging, on the assembly table, a frame member including an opening surrounded by a frame thereof and provided with electrode pads on the frame such that the opening is positioned at the pedestal; connecting the electrode pads to the electrodes of the oscillator placed on the pedestal via wires, while the frame member is arranged on the assembly table; removing the frame member from the assembly table together with the oscillator after the connecting, and bonding the frame member connected to the oscillator to a substrate. By using the method, the oscillator device including the oscillator suspended in air above the substrate can be efficiently manufactured. In stead of using the frame member, a frame body in which frame members are arrayed can be employed.

Abstract: A harmonic suppression resonator comprises a plurality of waveguide resonators that resonate in TE mode, in which harmonic suppression resonator, adjoining resonators are coupled via a plurality of coupling windows. Four coupling windows 33bc1, 33bc2, 33bc3 and 33bc4 are provided between a resonant region 51b and a resonant region adjoining the resonant region 51b. These coupling windows allow fundamental wave modes of the adjoining resonators to be coupled mainly by magnetically coupling. The coupling windows 33bc3 and 33bc4 allow second harmonic modes of the adjoining resonators to be electrically coupled, and the coupling windows 33bc1 and 33bc2 allow the second harmonic modes of the adjoining resonators to be magnetically coupled. By causing the amount of the electrically coupling and the amount of the magnetically coupling to be substantially equal, the coupling of the second harmonic modes is negated, whereby propagation of the second harmonic is blocked.

Abstract: A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The receive filter includes a flat, multi-pole bandpass filter, an input port and an output port, where the input port is coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, that has a length of approximately one quarter receive wavelength. The transmit filter includes a folded, multi-pole bandpass filter, an input port and an output port, where the output port is coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, that has a length of approximately one quarter transmit wavelength.

Abstract: A dielectric waveguide filter comprising a block of dielectric material including a plurality of resonators defined by a plurality of slots defined in the block of dielectric material. The resonators are arranged on the block of dielectric material in one or more rows and columns. First and second RF signal input/output electrodes are defined on the block of dielectric material. A first direct RF signal transmission path for the transmission of an RF signal is defined by the first and second RF signal input/output electrodes and the plurality of resonators. In one embodiment, internal windows define a first direct RF signal transmission means and additional RF signal transmission means define alternate or cross-coupling paths for the transmission of the RF signal from resonators in one column to resonators in another column. In one embodiment, the filter is comprised of two separate blocks of dielectric material which have been coupled together.

Abstract: [OBJECT] It is an object to provide a dielectric waveguide filter with attenuation poles, which is capable of suppressing deterioration in a high band-side attenuation characteristic with respect to a low band-side attenuation characteristic. [SOLUTION] A dielectric waveguide filter comprises a plurality of dielectric waveguide resonators each having a rectangular parallelepiped-shaped dielectric block, periphery of which is covered by a conductor film. The dielectric waveguide resonators are configured to form a main coupling path, and a sub coupling path bypassing a part of the main coupling path. The part of the main coupling path bypassed by the sub coupling path includes at least one capacitive coupling path.