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5175885 |
CRT update wideband double balanced mixer
An improved wideband double balanced GaAs mixer is presented and includes a plurality of FETs which are operative to couple a plurality of input signals to a diode ring quad wherein the signals are...
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5172082 |
Multi-octave bandwidth balun
A balun structure including a dielectric substrate having top and bottom surfaces on which are formed a splitter/combiner, a reference transmission line of length A and substantially constant...
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5148130 |
Wideband microstrip UHF balun
A wideband balun for converting between unbalanced and balanced signals and impedances utilizes two single-ended networks connected in parallel at the unbalanced side. The networks provide equal...
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5148131 |
Coaxial-to-waveguide transducer with improved matching
An end portion (14a) of a center conductor (14) of a coaxial cable (16) protrudes transversely into a tubular waveguide (10) near an end thereof. A piston (22) having a stepped inner wall (24)...
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5142253 |
Spatial field power combiner having offset coaxial to planar transmission line transitions
A cylindrical multi-port combiner having a graceful degradation characteristic with a high degree of isolation (25 db) between ports and a high combining efficiency (>90°) is disclosed. A...
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5125111 |
Resistive planar ring double-balanced mixer
A passive uniplanar double-balanced RF mixing apparatus, comprising a planar support substrate with first and second conductive layers disposed on first and second sides, and first and second...
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5122390 |
Method for uniformly coating a probe with dielectric and assembling a coax-to-waveguide transition
A probe for use in a coax-to-waveguide transition is uniformly coated with a dielectric material by inserting the probe through an elastic membrane covering a container of uncured RTV elastomer to...
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5121090 |
Balun providing dual balanced outputs
A dual output balun distributes substantially all of the available power in a single ended input signal applied thereto (less small parasitic losses) equally to two or more pairs of push-pull...
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5119051 |
Cavity-tuning coaxial coupler unit
A coaxial coupler unit has an outer conductor fastened to the outside of a first rigid metallic wall on one side of a microwave cavity, and the unit also has an inner conductor having at its front...
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5115214 |
Balancing loop
A balancing loop including a housing inside of which is disposed a first conductor part having a first sublength and a second sublength, with the first sublength constructed as a coaxial line...
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5107231 |
Dielectric waveguide to TEM transmission line signal launcher
Mode converting signal launchers for efficient coupling signals between dielectric insular and image waveguides and TEM mode transmission lines. The launcher includes a conductive ground plane and...
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5095292 |
Microstrip to ridge waveguide transition
This microstrip to ridge waveguide transition includes a microstrip dipole and a double-ridge waveguide transmission line. The microstrip dipole is centered on the open end of the waveguide and the...
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5091708 |
Transmission line transformer
A birdcage knee coil operated in quadrature in an NMR imaging system includes a pair of like butterfly coils each formed from a strip transmission line formed on a common dielectric substrate. The...
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5091732 |
Lightweight deployable antenna system
A deployable antenna assembly includes a canister providing an elongated chamber and an elongated hollow mast with a mounting member on its upper end. A coaxial cable extends into the hollow mast...
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5075648 |
Hybrid mode RF phase shifter and variable power divider using the same
A miniaturized waveguide mode ferrite RF phase shifter is efficiently transitioned to a matched impedance microstrip transmission line mode at either end to result in an ultra small, efficient and...
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5061910 |
Balun transformers
A balun is formed by printed tracks (20,22) on a printed circuit board. A first conductor to one side of the board extends between ground (13) and single ended signal port 11. A second conductor to...
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5057847 |
RF connector for connecting a mobile radiotelephone to a rack
An RF connector for connecting a radiotelephone (1) to an external antenna, whereby the telephone and a corresponding device rack (2) are connected to the external antenna by two pairs of matching...
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5053719 |
Wide-band push-pull amplifier
A radio frequency amplifier includes a first pair of quadrature couplers arranged to provide in response to an input signal first and second radio frequency signals having equal amplitudes and a...
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5049893 |
Microwave energy distributor capable of radiating directly
This distributor relates to radar antennas. It is used notably for making multiple-beam antennas. It is of the optical Blass matrix type. It has a horn-shaped guide with two energy leading-in...
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5045820 |
Three-dimensional microwave circuit carrier and integral waveguide coupler
A non-hermetic, three-dimensional, microwave semiconductor device carrier with integral waveguide couplers is disclosed. A molded plastic substrate having a suitable dielectric constant and varying...
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5043683 |
Waveguide to microstripline polarization converter having a coupling patch
A capacitively coupled printed patch (3) as a high efficiency device to couple orthogonally polarized energy between a microstripline (5) and a waveguide (1). Coupling between the microstripline...
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5028891 |
Arrangement for supplying power to a hollow waveguide intended for electromagnetic microwaves
A hollow waveguide (1) for electromagnetic microwaves supports an adaptation chamber (2) on one side thereof. The chamber includes a frame structure (7) and a cover member (8) and is provided with...
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5025232 |
Monolithic multilayer planar transmission line
A multilayer planar transmission line (10) can be fabricated as a monolithic structure with series/shunt-connected components for integration in an MMIC device. The multilayer planar transmission...
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5023594 |
Ceiling mount microwave transceiver with 360 degree radiation pattern
A microwave transceiver comprising a Gunn diode microwave radiation source, a Schottky-barrier diode mixer, a closed rectangular waveguide cavity, a coaxial-waveguide joint, and a monopole antenna...
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5017892 |
Waveguide adaptors and Gunn oscillators using the same
A waveguide adaptor or transition for interfacing a microwave waveguide to a coplanar transmission line or electronic device is disclosed. The adaptor includes a waveguide section having an...
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5015972 |
Broadband RF transformer
A broadband RF transformer design is described that facilitates the construction of a broadband impedance transformer in a compact, planar format, while retaining ease of assembly and manufacture....
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5010348 |
Device for exciting a waveguide with circular polarization from a plane antenna
A device for exciting a waveguide with circular polarization from a plane antenna, said waveguide (10) being a rectilinear hollow waveguide closed at one of its ends (12), said antenna being...
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5003622 |
Printed circuit transformer
Circuits such as balanced diode mixers require balanced transformers. For ultrahigh frequency operation, a balanced transformer is formed as part of a printed circuit on a planar substrate of...
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5001443 |
Coaxial-waveguide assemblages
Coaxial units are disclosed for conducting microwaves to and from amplifying apparatus with splitter and combiner cavities. Each coaxial unit comprises an outer conductor, a dielectric sleeve...
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4999592 |
Converter for planar antenna
A converter for use with planar antennas has a probe projected into an input part of waveguide structure as extended along a plane including a circuit board in a body of the converter, an opening...
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4992762 |
Ridge-trough waveguide
A waveguide configuration have a longitudinal ridge directly opposing a longitudinal trough. The ridge provides broadband signal transmission characteristics of ridge waveguides and may extend...
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4988961 |
Device for achieving minimal reflections in antenna coupling
A technique and arrangement for lowering the mismatch normally obtained, thereby increasing the bandwidth, in a standard rectangular-to-coaxial waveguide "T" junction coupling in an antenna system,...
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4980654 |
Transmission line transformer
A transmission line transformer that can balance imperfectly balanced signals, and can convert a balanced input to an unbalanced output. The transformer includes two unbalanced transmission lines...
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4973925 |
Double-ridge waveguide to microstrip coupling
A method and apparatus for coupling a double-ridge wavguide to a microstrip circuit. A lower ridge of a coupling section of waveguide is expanded by gradually increasing its width such that at the...
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4973972 |
Stripline feed for a microstrip array of patch elements with teardrop shaped probes
A circularly polarized microstrip array antenna utilizing a honeycomb substrate made of dielectric material to support on one side the microstrip patch elements in an array, and on the other side a...
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4970477 |
Microwave adjustment device for a transition between a hollow waveguide and a plane transmission line
A microwave adjustment device for a transition between a hollow waveguide (11) and a plane transmission line (10), the device comprising: an intermediate coaxial waveguide (12) comprising a core...
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4967168 |
Coaxial-wave guide coupling assemblages
Coaxial units are disclosed for coupling an r.f. amplifying microstrip to splitter and combiner wave guides, respectively, of a splitter-combiner apparatus. Each coaxial unit comprises an outer...
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4954790 |
Enhanced coupled, even mode terminated baluns, and mixers and modulators constructed therefrom
A balun section formed of a pair of transmission lines connected between separate pairs of corresponding input and output terminals with a pair of capacitors connected in series between the output...
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4952895 |
Planar airstripline-stripline magic-tee
A multilayer, multiconductor stripline magic-tee network is disclosed. The device incorporates a stripline balun that is sandwiched within a double-sided airstrip-line 3-port reactive-tee power...
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4916415 |
Balanced, impedance matched, coupling device
A single-ended to differential coupling device includes an input coaxial transmission line feeding sections of output coaxial transmission line across a break or gap between the outer conductors of...
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4916410 |
Hybrid-balun for splitting/combining RF power
An in-phase hybrid and a balun in a single stage built with inexpensive coaxial cable which splits or combines RF power and simultaneously performs a balanced-to-unbalanced impedance transformation.
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4904966 |
Suspended substrate elliptic rat-race coupler
A suspended substrate rat-race coupler utilizes an elliptic configuration of the usual circular rat-race coupler on a circuit card positioned within below cut-off suspended substrate housing...
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4901040 |
Reduced-height waveguide-to-microstrip transition
The present invention relates to a transition wherein a microstrip line, formed on one major surface of a substrate, is capacitively coupled to a reduced-height waveguide, comprising a...
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4894627 |
Directional waveguide-finline coupler
A waveguide coupler for coupling energy from one waveguide to another, using a finline mode coupler. The coupler use a mode converter which changes the propagation mode in a waveguide from...
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4891614 |
Matching asymmetrical discontinuties in transmission lines
The invention relates to matching asymmetrical discontinuites in transmission lines to give low reflection coefficients (less than five percent) over a wide frequency band (corresponding to at...
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4882553 |
Microwave balun
A broadband balun, suitable for feeding a spiral antenna, has a balanced port (20) comprising two adjacent strip conductors (16,17; 36,37) which are coupled to the unbalanced port (6) by respective...
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4868639 |
Semiconductor device having waveguide-coaxial line transformation structure
In a semiconductor device which has an air tight metal package containing a high frequency wave range circuit element and which has a waveguide-coaxial line transformation structure, a metal...
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4862189 |
Microwave transformer
A microwave balun transformer provides an extension of operating frequency range particularly in conjunction with a cavity-backed spiral antenna (5). The balun cavity (13) has a dipole (15,17)...
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4857869 |
High frequency push-pull transformer
This invention relates to a push-pull transformer for use in a high frequency push-pull amplifier. This push-pull transformer has a coaxial line whose one end is connected to an input terminal,...
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4846720 |
Balun trans and feeder line connecting device of antenna matching adapter for television set
A BALUN trans and feeder line connecting device for the antenna matching adapter, which is connected to an F-connector for VHF mounted on the antenna terminal strip of a television set is...
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