Abstract: A waveguide interface for millimeter wave and sub-millimeter wave applications adapted to couple and uncouple abutting waveguide sections wherein said waveguide interface acts as both a mating surface and a precision alignment mechanism. The waveguide interface comprises a first member having a first waveguide defined therein, a second member having a second waveguide similar in cross-section to said first waveguide defined therein, a means for mating said first member and said second member comprising a centrally located precision mating surface through which propagates electromagnetic energy and additionally comprising at least one pair of diametrically opposed rotational alignment pins and holes located a specified distance from said centrally located precision-mating surface, and wherein said pins and holes are in mating relation of looser fitment than said centrally located precision mating surface.

Abstract: A waveguide quick disconnect clamp includes a first arm and a second arm, both arms having a first end, a second end, and a jaw pivotally connected to the second end. Each of the first and second arm jaws has a generally flat engaging face defining two generally parallel elongated sections and a waveguide receiving recess therebetween. The second arm second end is pivotally connected to the first arm at a position intermediate the first arm first and second ends, and a threaded nut is pivotally connected to the first arm first end. The waveguide quick disconnect clamp also has an adjustment screw having a first end, a second end, and a threaded portion therebetween. The adjustment screw first end pivotally engages the second arm at a point intermediate the second arm first and second ends, and the threaded portion of the screw engages the threaded nut.

Abstract: An interface that provides minimum changes in contact pressure over a thermal range is disclosed. The interface is a mated joint of given material, typically metallic, joined by a mechanical fastener or fasteners. The fastener(s) create contact pressure at the joint surface wherein the contact pressure variation over a temperature range is minimized by the use of a thermal compensator having a predetermined length. The thermal compensator's length is chosen by setting the thermally induced expansion delta to offset an equal delta created by the fastener and interface configuration. The difference in expansion of the mated joint and fastener is canceled by the equal, but negative, difference between compensator and fastener. This cancellation of expansion minimizes the change in contact pressure at the joint interface. Maintaining a constant pressure provides PIM reliability during temperature changes.

Abstract: A waveguide interface for a waveguide having a split ring with a first half and a second half joined by a web portion. The split ring first half and second half having an inner surface configured to mate with an exterior of the waveguide, the first half and the second half foldable towards each other and around the exterior of the waveguide, along the web portion. An overbody with a bore is dimensioned to receive the waveguide therethrough; the bore having a shoulder at an interface end dimensioned to receive the split ring.

Abstract: Waveguide flanges for joining waveguide sections or components are designed to achieve mechanical strength and exhibit desired electrical properties such as relatively low insertion loss and high return loss. The present invention contemplates waveguide interfaces with a new choke flange designed to engage with a shield flange and provide a joint with improved electrical properties. The new choke designs produce a virtual continuity through the waveguide joints and minimize electrical energy leakage. The electrical and mechanical properties of the joint in the waveguide interfaces are robust and able to tolerate lower levels of parts precision, imperfect mating of the flanges without metal-to-metal contact and gaps up to 0.06? or more between the mating flange surfaces.

Abstract: An interconnect apparatus for providing a communication path for data signals in a predetermined frequency band, that includes a first and a second sections of a transmission line, connected at one end to first and second data transceiving devices, respectively. A switch, such as a mechanical, electro-mechanical, electronic, electro-magnetic and electro-optical switch, having conductive/non-conductive states, is provided for connecting/disconnecting between the other ends of the first and the second sections, for providing a data communication path between the data transceiving devices while being in its conductive state a third and a fourth sections of a transmission line, each of which connected at one end to a contact of the switch and at the other end to a first and a second connector, respectively.

Abstract: A sealing gasket for a waveguide assembly having a primary sealing surface loop defining a first plane and at least one secondary loop defining a second plane. The primary sealing surface loop intersecting with and being broken by the at least one secondary loop at two locations around the secondary loop.

Abstract: Conventionally, waveguide terminals formed in a plurality of dielectric substrates are joined together by mounting the dielectric substrates on carriers and fastening them to a waveguide adapter with screws. In the present invention, to reduce cost and improve machinability, a plurality of solders 7 are disposed around the waveguide terminal 2b formed in one dielectric substrate 1b, and the other dielectric substrate 1a having the waveguide terminal 2a is placed across the solders 7 to thereby connect the waveguide terminals by soldering.

Abstract: A flange adaptor assembly for coupling a waveguide to any number of flange interfaces, wherein the assembly includes a flange adaptor having a predetermined flange coupling interface. The flange adaptor of the present invention is constructed for engaging the common adaptor side of a number of waveguide flanges, while being semi-permanently secured to the end of a waveguide. The flange interface side of the waveguide flanges varies in accordance with the flange interface to which the waveguide is to be connected In this manner, a single waveguide can be manufactured and assembled for use with multiple waveguide flanges.

Abstract: A method of manufacturing a waveguide includes forming two waveguide units, each waveguide unit having a channel defined by a bottom wall and two side walls generally transverse to the bottom wall, flanges extending from the side walls, outside the groove, transverse to the side walls and generally parallel to the bottom wall, the flanges including though holes; joining the two waveguide units to each other so that the flanges of a first of the waveguide units abut the flanges of a second of the waveguide units, with the grooves forming a channel for guiding waves; and, by insert molding, forming a thermoplastic resin cover that fills the through holes in the flanges and covers both of the first and second waveguide units, at least partially.

Abstract: Provided is a waveguide interconnection apparatus making rectangular interconnecting portions to be a curved structure, whereby it is possible to reduce a signal reflection and a signal loss due to a mismatch occurred from a discontinuous portion where waveguides are perpendicularly connected to each other, and fabricate package products having excellent performances compared to that of the prior art in the same chip and structure.

Abstract: A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher is operatively connected to the control and comprises a wire having a first straight leg electrically connected at one end to the control and extending into the waveguide a first select length. A second straight leg is connected at one end to the rear wall and extends into the waveguide a second select length, greater than the first select length. A curved middle section connects the other ends of the first and second straight legs. An antenna is operatively coupled to the waveguide.

Abstract: A method and stiffener-embedded waveguide structure are provided for implementing enhanced data transfer for printed circuit board applications. At least one microwave channel is defined within a stiffener. The microwave channel provides a high frequency path for data transfers. Use of the waveguide channel in the stiffener for data transfers can replace or supplement otherwise required transmission paths in an associated printed circuit board.

Abstract: Conventionally, waveguide terminals formed in a plurality of dielectric substrates are joined together by mounting the dielectric substrates on carriers and fastening them to a waveguide adapter with screws. In the present invention, ot reduce cost and improve machinability, a plurality of solders 7 are disposed around the waveguide terminal 2b formed in one dielectric substrate 1b, and the other dielectric substrate 1a having the waveguide terminal 2a is placed across the solders 7 to thereby connect the waveguide terminals by soldering.

Abstract: An efficient solution to transform an output from a single ended source to a pair of differential signals that are provided to a differential receiver. The differential receiver is any number of devices including a differential clock receiver. The differential signals may be referenced to voltages used to receiver power supply voltages. The present invention obviates the need for an additional differential driver and its required additional devices that are needed to perform transformation of a single ended signal to a pair of differential signals. In one embodiment, two independent power and ground planes are communicatively coupled via a transmission line, or transmission line-like traces on a printed circuit board, and are used to provide uniform impedance control for all return paths within a system.

Abstract: The present invention discloses a system and method by which radio transceiver equipment may be coupled to antenna equipment polarized in either of two orthogonal polarizations without requiring any adaptation or additional componentry while providing the same signal path attributes irrespective of the polarization chosen. Accordingly, a single transceiver/antenna unit may be utilized for providing communications polarized vertically, or slant right, and polarized horizontally, or slant left.

Abstract: The present invention discloses a system and method by which radio transceiver equipment may be coupled to antenna equipment polarized in either of two orthogonal polarizations without requiring any adaptation or additional componentry while providing the same signal path attributes irrespective of the polarization chosen. Accordingly, a single transceiver/antenna unit may be utilized for providing communications polarized vertically, or slant right, and polarized horizontally, or slant left.

Abstract: Provided is a waveguide interconnection apparatus making rectangular interconnecting portions to be a curved structure, whereby it is possible to reduce a signal reflection and a signal loss due to a mismatch occurred from a discontinuous portion where waveguides are perpendicularly connected to each other, and fabricate package products having excellent performances compared to that of the prior art in the same chip and structure.

Abstract: A wave-guide having at least two connection points. In order to adapt a physical distance between these points to a variable distance between connection points of external equipment, at least one connector (20) is provided having a first connecting member (31) for connection to a connection point (28) of the wave-guide and a second connecting member (33) for connection to a connection point of the external equipment. The connecting members of the connector are laterally displaced such that rotation of the second connecting member (33) about the first one (31) results in a variation of the distance between the second connecting member and another connection point of the wave-guide.

Abstract: In one aspect, the invention relates to a waveguide structure for differential transmission lines. The waveguide structure includes a first ground structure, a first signal line, a second ground structure, a second signal line, a third ground structure. The first signal line is typically positioned adjacent and substantially parallel to the first ground structure. The second ground structure has a first separation distance from the first ground structure and is typically positioned adjacent and substantially parallel to the first signal line. The first signal line is typically positioned between both the first and second ground structures. The second signal line typically a has a second separation distance from the first signal line and is positioned adjacent and substantially parallel to the second ground structure. The second ground structure is typically positioned between both the first and second signal lines.

Abstract: The present invention provides a method of efficiently manufacturing a dielectric waveguide with high reliability and precision. In the method, a resist material is formed on the outer surface of a green compact provided with a removal inhibiting layer, and predetermined portion of the green compact defined by the resist material is removed by the sand blasting method using the resist material as a mask, until the removal inhibiting layer is exposed to obtain a shaped green compact structure. The thus-obtained structure is fired to obtain a sintered body which comprises a dielectric strip and a wing.

Abstract: A connector is provided that eliminates a conductive portion and is free from mechanical contact at its coupling portion. A pair of holders is provided with an interface unit and cables extending outwardly are connected to one part of the interface unit, and radio wave-electric signal mutual converting elements built in the holders are connected to the other part of the interface unit. The pair of holders is allowed to be coupled in proximity by means of a coupling mechanism made from a flexible electromagnetic field shielding material, and a radio wave propagation space is formed at the coupling proximity portion of a pair of the holders which is shut out from the electromagnetic field of the outside. The radio wave-electric signal mutual converting elements of a pair of the holders conduct the reception and transmission of the radio wave mutually by being opposed in proximity by means of the radio wave propagation space.

Abstract: A wiring board module has two wiring boards placed on an external circuit board. In each wiring board, a terminal end of a laminated waveguide tube is exposed at a lateral side of a dielectric substrate, thus forming an exposed face, and the dielectric substrate is provided at the bottom thereof in the vicinity of the exposed face with connection pads to be used for mounting the wiring board on the surface of the external circuit board. The exposed faces of the laminated waveguide tubes of the two wiring boards are contacted with each other, and the connection pads at the bottoms of the wiring boards are connected and fixed to connection pads disposed on the surface of the external circuit board.

Abstract: The present invention relates a printed circuit board having jumper lines, and a method for making the printed circuit board. An isolation layer made of a dielectric material is coated on the line layer of the printed circuit board, and multiple pads are formed in the isolation layer, thereby exposing part of the line layer without covered by the isolation layer. A high conductive material is coated on the isolation layer to connect the multiple pads, thereby forming a planar jumper layer that is connected to the line layer through the circular pads. Thus, the planar jumper layer may be made simultaneously during fabrication of the printed circuit board, without having to perform the wire-bonding work.

Abstract: A high-frequency wiring board of the present invention is characterized in that W1>W2 and S1≧S2 are satisfied in which W1 is a line width of a portion having a predetermined characteristic impedance of a line conductor, W2 is a conductor width of the line conductor in proximity to a connection of one end of the line conductor to a through conductor, S1 is an interval between the portion having the line width W1 of the line conductor and a same plane ground conductor, and S2 is an interval between the portion of the one end of the line conductor in proximity to the connection to the through conductor and the same plane ground conductor.

Abstract: A waveguide fitting for connecting in particular a rectangular waveguide to an elliptical waveguide can be assembled particularly easily and yet provides a very low-reflection connection if the fitting at least at one end is conductively provided with the first section of a sleeve of which the second section is designed to receive the end region of the waveguide to be connected and which is divided at least in this second section by narrow capillary-action axial slots into radially springing lamellae which, after insertion of the waveguide, abut against the outer wall thereof, and in addition the inner wall at least of the second section of the sleeve is designed to receive a solder deposit. To make the connection, it is then necessary only to heat the whole junction with an external heat source until the solder in the solder deposits melts and fills the gaps between the inner wall of this section of the sleeve and the outer wall of the waveguide.

Abstract: An interconnection system comprises mating male and female connectors. The male connector has a first end with an outer face and a second end with an inner face, an aperture passing through the center, radially extending flanges coplanar with the inner face and recesses formed between the flanges with a first circumference. The female connector has a central aperture passing there through, receivers with lips having an edge with the first circumference. When mated in the locked state, the flanges of the male connector form a coplanar coupling with the receivers of the female connector with the central apertures aligned and at least one bore passing through both connectors.

Abstract: A tunable electromagnetic transmission structure for effecting coupling of electromagnetic signals having a frequency includes: (a) a dielectric substrate having an opposing first side and second side; (b) at least one first conductive land occupying a first area on the first side; (c) at least two second conductive lands on the second side separated by at least one substantially linear channel; the at least one channel having a width established by the frequency; the at least two second conductive lands and the at least one channel occupying a second area generally in register with the first area; and (d) a tunable dielectric material at least substantially filling the at least one channel; the tunable dielectric layer being electrically coupled with at least two second conductive lands of the at least two second conductive lands.

Abstract: A measuring device for determining the level of material in a container including a process seal comprising: a substantially conical portion including a narrow end and a wide end, the conical portion terminating at the wide end in a substantially cylindrical outer surface; and a flange portion extending outwardly from the substantially cylindrical outer surface. The process seal minimizes reflection and attenuation of measuring device energy, seals the connection to the container, and meets sanitary standards.

Abstract: A waveguide apparatus for bidirectional distribution of signals includes: (a) a first conductive element parallel with a reference plane; (b) a second conductive element in spaced parallel relation with the first element; (c) a first coupling locus situated in the first element; and (d) second coupling loci arrayed in the second element. Each second coupling locus includes an aperture traversing the second element at a lineal distance from the first coupling locus in a lineal plane perpendicular with the reference plane and containing a line from the first coupling locus. Each aperture has a major and a minor axis. The major axis establishes an installation attitude with respect to the lineal plane. The lineal distance and the installation attitude for each aperture are selected to distribute electromagnetic signals having substantially equal power.

Abstract: A waveguide connector for connecting an elliptical waveguide to a rectangular waveguide includes an elliptical-waveguide-receiving portion adapted to receive an end portion of an elliptical waveguide. The waveguide connector also includes a rectangular-waveguide-connecting portion adapted to connect to an end portion of a rectangular waveguide. After the end portion of the elliptical waveguide has been received in the elliptical-waveguide-receiving portion of the waveguide connector, the elliptical waveguide and the waveguide connector are soldered together. The rectangular-waveguide-connecting portion of the waveguide connector includes a flange with attachment points therein. The rectangular-waveguide-connecting portion of the waveguide connector is attached to a rectangular waveguide through the attachment points via screws, bolts, or the like. One embodiment of the waveguide connector includes unitary construction wherein a stepped transformer having transition sections is formed therewith.

Abstract: A dielectric waveguide designed to avoid the influence of reflection of electromagnetic waves at connected portions of dielectric strips and to have an improved characteristic. The distance L between connection planes between pairs of dielectric strips adjacent in the direction of propagation of an electromagnetic wave is set to an odd number multiple of ¼ of the guide wavelength. Reflected waves are thereby superposed in phase opposition to each other to cancel out. In this manner, propagation of a reflected signal to ports is limited.

Abstract: After through holes (25) are formed on flange portions (23) of a pair of waveguide units (20) and (21), and the pair of the waveguide units (20) and (21), in which the through holes (25) have been formed, are joined together, insert molding of the pair of the joined waveguide units (20) and (21) is executed using a thermoplastic resin to form a resin cover (30) filled into the through holes (25) and covers the pair of the waveguide units (20) and (21). Accordingly, an improved assembling efficiency, stronger fastening force between waveguide units, and better air-tightness of the waveguide are obtained by using resin molding to fasten the pair of the waveguides.

Abstract: An electromagnetic enclosure is provided that this configured to enclose an electrical assembly. The enclosure includes a waveguide defining a channel that one or more cables from the electrical assembly pass through. The waveguide is dimensioned to attenuate radiation having a selected frequency range. With the present invention, shielding emitted or transmitted radiation around an opening in an enclosure and around cables can be easily done.

Abstract: A waveguide connector for connecting an elliptical waveguide to a rectangular waveguide includes an elliptical-waveguide-receiving portion adapted to receive an end portion of an elliptical waveguide. The waveguide connector also includes a rectangular-waveguide-connecting portion adapted to connect to an end portion of a rectangular waveguide. After the end portion of the elliptical waveguide has been received in the elliptical-waveguide-receiving portion of the waveguide connector, the elliptical waveguide and the waveguide connector are soldered together. The rectangular-waveguide-connecting portion of the waveguide connector includes a flange with attachment points therein. The rectangular-waveguide-connecting portion of the waveguide connector is attached to a rectangular waveguide through the attachment points via screws, bolts, or the like. One embodiment of the waveguide connector includes unitary construction wherein a stepped transformer having transition sections is formed therewith.

Abstract: A connection structure for dielectric waveguide lines, which includes dielectric waveguide lines including dielectric substrates, a pair of main conductor layers, dielectric substrates parallel with one another being sandwiched therebetween, two rows of side-wall through conductor groups arranged at intervals less than one half of a signal wavelength in a transmission direction of high-frequency signals, so as to electrically connect the pair of main conductor layers, and a sub conductor layer disposed between each pair of main conductor layers in parallel with the main conductor layers and electrically connected with the side-wall through conductor groups. The waveguides are stacked so that the main conductor layers partly overlap each other to define an overlap part, in which a coupling window is formed. This allows design freedom and easy fabrication.

Abstract: A wideband, coaxial orthogonal-mode junction or OMJ coupler (420) is disclosed. The OMJ coupler (420) includes a coaxial waveguide (420A) having two or more ridges (460), two or more sectoral waveguides (420B,462) having a corresponding number of ridges or T-septa (460) as the coaxial waveguide (420A), and a mechanism for converting (470) the coaxial waveguide (420A) into the sectoral waveguides (420B) formed inline with the coaxial and sectoral waveguides (420A,420B). The converting mechanism preferably includes at least two metal fins (470) symmetrically disposed in the coaxial waveguide (420A) and coupled to the sectoral waveguides (420B). Optionally, the metal fins (1270) are tapering in shape. More preferably, there are four metal fins (470, 1270), four sectoral waveguides (420B), and four ridges or T-septa (460) in the coaxial and sectoral waveguides (420A, 420B).

Abstract: In an interconnect system for providing access to a common I/O terminal for multiple circuit devices such as drivers, receivers and electrostatic protection devices implemented on an IC, each such device is provided with a separate contact pad within the IC. The contact pads are linked to one another and to the IC I/O terminal though inductive conductors such as bond wires, metalization layer traces in the IC, or legs of a forked, lithographically-defined spring contact formed on the IC. The conductor inductance isolates the capacitance of the circuit devices from one another, thereby improving characteristics of the frequency response of the interconnect system. The inductances of the conductors and various capacitances of the interconnect system are also appropriately adjusted to optimize desired interconnect system frequency response characteristics.

Abstract: The invention concerns an assembly for the pressure-tight separation of a first waveguide (12) from a second waveguide (16), having a pressure-resistant conductor body (22) and a first adaptor (26), which is arranged between the first waveguide (12) and the end of the conductor body (22) facing the latter, and a second adaptor (30), which is arranged between the second waveguide (16) and the end of the conductor body (22) facing the latter, the dielectric constants of the first and second adaptors (26, 30) lying between those of the conductor body (22) and the waveguides (12, 16). An assembly of this kind can be used in particular for an electronic device with a contact pin (10) and an antenna (18), the contact pin (10) radiating into a first waveguide (12) and the antenna (18) being connected to a second waveguide (16) and a pressure-tight bushing for microwave radiation being required between the first and second waveguides (12, 16).

Abstract: A quick disconnect assembly 200 simply and quickly connects two components to one another with the high degree of accuracy while eliminating small, losable parts. The quick disconnect assembly includes a receiver 202 and a fork 206. The receiver is attached to a first fitting 204 on a first component 132. A fork end brace 205 extends out from the receiver to provide an attachment flange for the fork. The second component 137 has a second fitting 208 that is correspondingly shaped to mate against the first fitting and to house within the receiver. The fork is attached via a lanyard to the second fitting. The fork includes a securement knob 210 having threadings 207 that projects through the base of the fork. Rotation of the knob advances or retracts the threadings. The legs of the fork contain protrusions 212 and 214 are correspondingly shaped to mate with depressions 216 and 218 in the receiver.

Abstract: An interconnection system for effecting the rapid connection and disconnection of facing components comprises male and female connectors. A first end of the male connector is generally rectangular. The second end has a cylindrical portion extending inwardly, an inner face, and radially extending flanges. Recesses are formed between the flanges and the first end. The female connector is configured to mate with the male. When in the locked state the flanges of the male connector form a coplanar coupling with receivers of the female connector.

Abstract: An interconnection system for effecting the rapid connection and disconnection of facing components comprises male and female connectors. A first end of the male connector is generally rectangular. The second end has a cylindrical portion extending inwardly, an inner face, and radially extending flanges. Recesses are formed between the flanges and the first end. The female connector is configured to mate with the male. When in the locked state the flanges of the male connector form a coplanar coupling with receivers of the female connector.

Abstract: A connector device is provided in the form of a main body component having a lower surface covered with a conductive layer to provide a ground plane and an upper surface carrying a conductive strip portion to form a microstrip line. The combination of the first conductive surface region (ground plane) and second conductive surface region (microstrip line) separated by the main body component dielectric forms a microstrip section. The conductive layer and strip portion are each connected to a conductor of co-axial feed cable. The device is inserted between conductive layers of an antenna of laminar construction, such as a planar inverted F antenna to establish electrical connection between conductors of the feed cable and conductive layers of the antenna.

Abstract: A radio frequency (RF) thermal isolator and method of manufacture for same. According to one embodiment, the RF thermal isolator includes a first transmission line; a second transmission line of nominally the same dimensions as the first transmission line and axially aligned with the first transmission line, wherein the ends of the transmission lines are separated by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; and an electrically conductive sleeve electrically attached to the end of the first transmission line and surrounding the end of the second transmission line and separated from the second transmission line by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; wherein the sleeve extends along the second transmission line from the end of the first transmission line for a distance of nominally ¼ of the center operating wavelength of the transmission lines.

Abstract: Conventionally, waveguide terminals formed in a plurality of dielectric substrates are joined together by mounting the dielectric substrates on carriers and fastening them to a waveguide adapter with screws. In the present invention, ot reduce cost and improve machinability, a plurality of solders 7 are disposed around the waveguide terminal 2b formed in one dielectric substrate 1b, and the other dielectric substrate 1a having the waveguide terminal 2a is placed across the solders 7 to thereby connect the waveguide terminals by soldering.

Abstract: A device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The device with a nonradiative dielectric waveguide is, for example, an oscillator, a circulator, a coupler or the like. The device has a pair of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is defined by an end of each of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip. An end of the dielectric strip is exposed at a corresponding end surface of the device.

Abstract: An arrangement is disclosed for connecting two identical electromagnetic wave guides with rectangular cross-section, which serve to transmit linearly polarised electromagnetic waves and the rectangular hollow spaces of which are twisted with respect to one another in such a way that their corresponding axes run at right angles to one another. Between the two wave guides a connecting element is arranged, by means of which a low-reflection rotation of the polarisation plane of the waves to be transmitted takes place from the polarisation plane of one wave guide into the polarisation plane of the other wave guide orthogonal thereto.

Abstract: A dielectric waveguide designed to avoid the influence of reflection of electromagnetic waves at connected portions of dielectric strips and to have an improved characteristic. A third dielectric strip is inserted in a part of a connection section at which a first dielectric strip and a second dielectric strip are connected to each other, and the distances between the three connection planes in said connection section are determined so that a wave reflected at the connection plane between the first and third dielectric strips, a wave reflected at the connection plane between the first and second dielectric strips, and a wave reflected at the connection plane between the second and third dielectric strips are superposed with a phase difference of 2&pgr;/3 from each other.

Abstract: A planar waveguide-to-microstrip adapter, a waveguide antenna and a downconverter all formed on a single dielectric substrate. The waveguide-to-stripline adapter is connected to the waveguide antenna and includes a tapered section attached to a microstrip line. The tapered section, which may be linear or may follow some other more complex taper function such as a Chebyshev function, adapts a signal propagating within the waveguide antenna to the microstrip line or vice versa.

Abstract: A radio frequency (RF) thermal isolator and method of manufacture for same. According to one embodiment, the RF thermal isolator includes a first transmission line; a second transmission line of nominally the same dimensions as the first transmission line and axially aligned with the first transmission line, wherein the ends of the transmission lines are separated by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; and an electrically conductive sleeve electrically attached to the end of the first transmission line and surrounding the end of the second transmission line and separated from the second transmission line by a gap having a width that is a very small fraction of the center operating wavelength of the transmission lines; wherein the sleeve extends along the second transmission line from the end of the first transmission line for a distance of nominally ¼ of the center operating wavelength of the transmission lines.