Abstract: A filtering device includes at least one dielectric resonant element, which includes a dielectric block, an outer conductor, and an inner conductor, a terminal disposed in a through hole of the dielectric resonant element from a front surface, a plate-shaped circuit element electrically coupled with the at least one dielectric resonant element via the terminal, and a substrate on which the at last one dielectric resonant element and the plate-shaped circuit element are mounted. The outer conductor is disposed so as to cover the back surface besides the peripheral surface of the dielectric block. The first end surface of the dielectric block includes a first electrode-free portion that electrically isolates the inner conductor from the outer conductor, and a second electrode-free portion that electrically isolates the inner conductor from the outer conductor.

Abstract: A power dividing circuit includes a power dividing input terminal, a high pass filtering module and a low pass filtering module. The power dividing input terminal divides a signal into two divided signals. The high pass filtering module includes two high pass filtering units. The low pass filtering module includes two low pass filtering units. Each divided signal is filtered by one of the two high pass filtering units and one of the two low pass filtering units.

Abstract: A power combiner/divider includes a main conductor defining an axis; an input connector having a center conductor, adapted to be coupled to a signal source, electrically coupled to the main conductor and having an axis aligned with the main conductor axis, and having a second conductor electrically coupled to a ground conductor; a cylinder conductor including an inner cylindrical surface radially exterior of and spaced apart from the main conductor, including an outer cylindrical surface, and having a cylinder axis aligned with the main conductor axis; and a plurality of output connectors having respective axes that are perpendicular to the main conductor axis, the output connectors being radially spaced apart relative to the main conductor, the output connectors having center conductors electrically coupled to the cylinder conductor and having respective second conductors electrically coupled to a second ground conductor. Methods are also provided.

Abstract: A power combiner/divider includes a main conductor; a ground conductor radially exterior of the main conductor; an input connector having a center conductor electrically coupled to the main conductor and having a second conductor electrically coupled to the ground conductor; a conductive cylinder including an inner cylindrical surface radially exterior of and spaced apart from the main conductor, including an outer cylindrical surface; a second ground conductor radially exterior of the outer cylindrical surface of the conductive cylinder, a gap being defined between the second ground conductor and the outer surface of the conductive cylinder; a plurality of output connectors, the output connectors having center conductors electrically coupled to the conductive cylinder and having respective second conductors electrically coupled to the second ground conductor; and means for receiving and retaining a gas inside the divider/combiner. Methods of manufacturing are also disclosed.

Abstract: Radio frequency subscriber drop units include a housing having an input port and an output port and a printed circuit board mounted in an interior of the housing. The printed circuit board includes a dielectric layer, a wiring layer that includes conductive wirings that comprise at least part of a communications path between the input port and the output port that is on a first face of the dielectric layer, and a ground plane layer that includes a conductive ground plane that is on a second face of the dielectric layer.

Abstract: There is provided an acoustic resonator including: a resonance part including a first electrode, a second electrode, and a piezoelectric layer interposed between the first and second electrodes; and a substrate provided below the resonance part, wherein the substrate includes at least one via hole penetrating through the substrate and a connective conductor formed in the via hole and connected to at least one of the first and second electrodes. Therefore, reliability of the connective conductor formed in the substrate may be secured.

Abstract: Disclosed is apparatus and method to filter a signal. In such an apparatus, an outer polyphase filter is configured for receiving an input signal and for channelizing the input signal into outer filtered samples. An outer Inverse Fourier Transform block is coupled to the outer polyphase filter and configured for transforming the outer filtered samples into a coarse multi-path output. An inner polyphase filter is coupled to a path of the coarse multi-path output for receiving information therefrom and configured for generating inner filtered samples of the information obtained from the path. The inner filtered samples are for moving an edge of a passband associated with the outer filtered samples toward a center of the passband.

Abstract: In an end surface 32b of the second transmission line forming body 32 forming a second waveguide 30, the height of a central region 33 which includes an opening of the second transmission line 30b is a reference plane. A depressed portion 32e that is depressed to a depth greater than the length of a thread portion of a screw 205 from the reference plane is provided in a region outside the central region 33 and includes a screw hole forming position. A screw hole 32d for fixing an external circuit 200 to be connected is provided at the screw hole forming position in the depressed portion 32e. The height of a region, which is excluding the depressed portion 32e and is further away from the central region 33 than the screw hole forming position, is equal to the reference plane.

Abstract: A technique relates to a lossless microwave switch discussed herein. Multiple ports are included in the lossless microwave switch. Tunable filters are included in the lossless microwave switch. Each of the ports is operatively coupled a corresponding one of the tunable filters.

Abstract: The branch portion includes: a first circuit portion electrically connected to the main wire while extending to a leading end from a base end of the branch portion; a second circuit portion electrically connected to the main wire while extending to the leading end from the base end of the branch portion and electrically connected to the first circuit portion at the leading end of the branch portion; and a ground conductor that is disposed between the first circuit portion and the second circuit portion while extending to the leading end from the base end of the branch portion and has one end to be grounded and the other end to be opened.

Abstract: The invention provides a bandpass filter, comprising: a substrate with a plurality of dielectric layers; a plurality of resonators; and a plurality of ground layers each having one slot arranged on; wherein the plurality of resonators are arrayed vertically each on respective one of the plurality of dielectric layers alternately without any of offsets, and each of the plurality of ground layers is between adjacent dielectric layers. Adjacent slots are arranged in opposite sides of the ground layers. The invention also provides a method of fabricating the bandpass filter.

Abstract: An impedance matching power combining/dividing system and a method for combining power combiners/dividers are presented. The impedance matching power combiner comprises a cylindrical matching cavity, two or more coaxial inputs, each of the two or more coaxial inputs having an inner input conductor and an outer input conductor and having a source impedance, a coaxial output having an inner output conductor and an outer output conductor and having a load impedance and a circular matching plate suspended inside the cylindrical matching cavity, wherein the inner input conductors and the inner output conductor are electrically connected to the matching plate, the outer input conductors and the outer output conductor are electrically connected to the cylindrical matching cavity and the cylindrical matching cavity at least partially matches the source impedance with the load impedance. The system and method to combine/divide groups of power combiners/dividers to handle high power are also presented.

Abstract: The present disclosed technique pertains to high Q mode resonators, and, more particularly, to a technique for separating a high Q mode from masking low Q modes. In a first aspect, it includes a high Q mode resonator, comprising: a housing defining a clover-shaped resonating cavity; a dielectric material filling the cavity; an input to the cavity; and an output from the cavity. In a second aspect, it includes a high Q mode resonator, comprising: a housing defining a clover-shaped resonating cavity, the cavity comprising four intersecting right angle, cylindrical chambers; a fluid dielectric material filling the cavity; an input to the cavity; and an output from the cavity. In a third aspect, it includes a method, comprising: introducing a signal to a resonating cavity; resonating the signal within a chamber, the resonating cavity shifting the resonance of the low Q mode higher in frequency than it shifts the high Q mode; and permitting egress of the signal from the resonating cavity.

Abstract: A duplexer includes a plurality of first resonators disposed along the transmission path of the transmitting signal; a plurality of second resonators disposed along the transmission path of the receiving signal; and a combining panel having an overlapped area between one of the plurality of first resonators which is disposed closest to an antenna and one of the plurality of second resonators which is disposed closest to the antenna, wherein each of said first resonators and said second resonators includes: a body comprised of dielectric material, and formed with a through hole penetrating unidirectionally, and a conducting layer formed on the cross-section of at least one side of the cross-sections of the both sides along the lengthwise direction of said body, and the surface of the wall of said through hole.

Abstract: A method and apparatus for managing a magnetic permeability of a core. The apparatus comprises a core and a plurality of electrodes positioned relative to the core. The core comprises a plurality of liquid crystals and a plurality of magnetic nanoparticles. Changing a voltage applied to the plurality of electrodes changes a magnetic permeability of the core.

Abstract: Techniques, apparatus and systems that use composite left and right handed (CRLH) metamaterial structures to combine and divide electromagnetic signals at multiple frequencies. The metamaterial properties permit significant size reduction over a conventional N-way radial power combiner or divider. Dual-band serial power combiners and dividers and single-band and dual-band radial power combiners and dividers are described.

Abstract: A very wide bandwidth composite band pass filter with steep roll-off of a corresponding passband includes a band pass filter and a high-Q acoustic resonator. The band pass filter has a corresponding passband with a very wide bandwidth and a passband roll-off. The high-Q acoustic filter has a corresponding stopband with a roll-off steeper than the passband roll-off, the high-Q acoustic filter being connected in parallel with the band pass filter such that a portion of the stopband is within the passband of the band pass filter, forming a combined passband. A frequency range of the combined passband is approximately the same as a frequency range of the passband of the band pass filter, and a combined roll-off of the combined passband is steeper on one side than the passband roll-off of the band pass filter.

Abstract: Multiplexing circuitry is disclosed that includes filtering circuitry, which provides a first transfer function between a common port and a first port and a second transfer function between the common port and a second port. The first transfer function and second transfer function provide a first passband and a second passband, respectively. The first transfer function also has a stopband provided within the second passband of the second transfer function due to the filtering circuitry including a first parallel resonant circuit provided in series in a first filter path being weakly coupled to a second parallel resonant provided in shunt with respect to a second filter path. The weak coupling between the first parallel resonant circuit and the second parallel resonant circuit thus naturally provides a stopband in the first transfer function within the second passband of the second transfer function.

Abstract: A frequency demultiplexer comprising an input part (106) with an input port (101), a low pass filter (125) and a band-pass filter (108) with output ports (120, 145). The input part (106), the low-pass filter (125) and the band-pass filter (108) comprise open waveguide sections, and the band-pass filter (108) comprises gap-coupled resonators (130, 135, 140). The input part (106) and the low-pass filter (125) connect to the same resonator (130), the connection (121) of the low-pass filter (125) being at a first maximum distance (L1) from a center point (N) of the resonator and the connection (116) of the output port (101) being at a second maximum distance (L2) from said center point (N) of the resonator. The center point (N) corresponds to a wave node of a wavelength ?, where ?=2d/M, M is a positive integer value and d is the shortest end-to-end distance along the resonator.

Abstract: A phase shifter and a method of making a phase shifter are disclosed herein. The phase shifter may include a housing, a dielectric, an electrode, and a liquid crystal layer. The housing includes first, second, third, and fourth conductive walls, each conductive wall being opposite one of the other walls. The dielectric is situated within the housing and defines a compartment within the housing. The electrode is aligned with the compartment. The liquid crystal layer fills the space of the compartment. A bias line is coupled to the electrode. The phase shifter may be integrated with as substrate integrated waveguide.