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RE40900 |
Amplifier circuit
An amplifier circuit for amplifying an input signal to generate an amplifier output signal incorporates a cascaded series of reflection amplifiers arranged along a signal path and operative to...
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7190108 |
Methods and apparatus using pulsed and phased currents in parallel plates, including embodiments for electrical propulsion
First and second parallel conducting plates include arrayed conducting segments, preferably with specific spacing relative to each other and to the separation of the plates. Currents through the...
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6799027 |
Amplifier circuit
An amplifier circuit for amplifying an input signal to generate an amplifier output signal incorporates a cascaded series of reflection amplifiers arranged along a signal path and operative to...
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6650173 |
Programmable voltage generator
The voltage generator comprises a negative feedback loop including a programmable voltage divider having a feedback node. The voltage divider comprises a programmable resistor disposed between the...
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6603956 |
Radio repeater using the non-radiative dielectric waveguide
A radio repeater wherein a reflective negative resistance amplifier, using the negative resistance of a Gunn diode, is applied at one side of a dielectric waveguide, enabling signals to be inputted...
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6414551 |
Multi-space structure amplifier
A high frequency amplifier with the multi-space structure, amplifying various frequencies by a Gunn diode in the multi-space structure, composed of non-radiative dielectric waveguides of various...
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5446426 |
Microwave power combiner
A microwave power combiner is formed in a cylindrical hollow metallic housing utilizing a number of pie shaped chambers formed with metallic vanes attached to and extending radially inward from the...
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5291650 |
Method of providing a integrated waveguide combiner
A microwave power combiner includes a first plate having disposed in a first surface thereof a first plurality of grooves and a second plate having disposed in a first surface of said second plate...
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5229728 |
Integrated waveguide combiner
A microwave power combiner includes a first plate having disposed in a first surface thereof a first plurality of grooves and a second plate having disposed in a first surface of said second plate...
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5021748 |
Circular ring resonator distributive electromagnetic signal processor
An electromagnetic signal processor is disclosed comprising an input waveguide, an intermediate waveguide, and an output waveguide. The intermediate waveguide comprises two portions having...
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4902985 |
Microwave reflectiion amplifiers having increased bandwidth
A four diode reflection amplifier having a relatively wide bandwidth of at least 5 percent over the frequency range of 43.5 to 45.5 GHz includes three magic Ts arranged to provide a 4-way passive...
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4853650 |
Symmetric waveguide junction combiner
A microwave power combiner having a spherical region from which six rectangular waveguides extend oppositely along mutually orthogonal diameters. The long dimension of each waveguide cross section...
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4825175 |
Broadband, high isolation radial line power divider/combiner
Disclosed is a power divider/combiner using two parallel plate radial transmission lines having parallel plate spacing of less than λ/2 and which operates in a higher order mode, preferably the...
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4814729 |
Precisely tunable impatt diode module for weather radar apparatus
A microstrip IMPATT circuit tuning mechanism for use with RF producing IMPATT diode combinations including a microstrip circuit board and a external load line connected by a coupling spring...
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4812782 |
Non-reactive radial line power divider/combiner with integral mode filters
Disclosed is a parallel plate radial transmission line having parallel plate spacing of less than λ/2 and which utilizes a specific higher order mode, preferably the first higher order...
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4706041 |
Periodic negative resistance microwave structures and amplifier and oscillator embodiments thereof
Structures (30) with IMPATT type diodes (34) located periodically along a transmission line (38-32) to simulate a distributed diode are disclosed. Preferred embodiments include incorporation of the...
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4656438 |
Power combining cavity
A method and arrangement for enhancing the level of supplied microwave energy including a resonant ring capacitively coupled to a microwave coupling device effective for connecting to a microwave...
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4623849 |
Broadband high power IMPATT amplifier circuit
An IMPATT diode mounted in a double-tuned resonant cavity to exhibit stability by suppressing subharmonic frequencies is disclosed. A foreshortened quarter wavelength section is connected to the...
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4600894 |
Planar radial resonator oscillator/amplifier
An apparatus and method is disclosed for providing a planar disc resonator oscillator/amplifier which consists of a planar radial disc resonator, a substrate having a hole extending therethrough, a...
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4571555 |
Re-entrant coaxial cavity power combiner
A plurality of negative resistance devices is spaced below a cylindrical center conductor of a single coaxial cavity. Each negative resistance device has a bias device connected to it by a bias...
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4539528 |
Two-port amplifier
A two-port monolithic microwave amplifier, which uses a distributed negative resistance diode with gain (such as an IMPATT diode) as an active element. The diode is tapered (increasing in width but...
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4535302 |
Microwave amplifier
An improved microwave amplifier is shown to comprise an IMPATT diode in a coaxial circuit coupled to a section of double-ridged waveguide forming a resonant cavity with a low Q, such cavity in turn...
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4525732 |
Distributed IMPATT structure
In a distributed IMPATT structure, power is coupled out through a side contact. That is, in previously proposed distributed IMPATT structures the gain medium (the active region of the IMPATT)...
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4517527 |
Waveguide amplifier circuit
A waveguide amplifier circuit has two semiconductor amplifier elements in a first waveguide circuit, a second waveguide circuit which is perpendicular to the first waveguide circuit and a...
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4503404 |
Primed microwave oscillator
A primed oscillator for microwave amplification includes a single tank conductor (16) coupled to a coupling conductor (17) by an interdigitated coupler (26). The coupling conductor (17) is...
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4468633 |
Adjustable microwave power combiner for a plurality of coaxially mounted impatt diodes
A typical coaxial circuit which couples a negative resistance diode to the cavity of a power combiner consists of a metallic rod which is biased by a spring against the diode supported by a carrier...
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4431974 |
Easily tuned IMPATT diode module
An improved microwave circuit is disclosed for enabling impedance tuning for power coupling in IMPATT diode and other similar oscillator and amplifier circuits. An electrically conductive support...
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4415867 |
Hybrid coupled microstrip amplifier
A microstrip integrated circuit reflection amplifier utilizing packaged diodes and permitting some gain and bandwidth adjustment. A 3 db quadrature coupler has two of its ports connected to...
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4359700 |
Balancing network for microwave power combiner
The diode bias input terminals of an IMPATT microwave power combiner are resistively coupled to a common floating node to provide stabilization of the operating points of the individual IMPATT...
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4316160 |
Impedance transforming hybrid ring
An impedance transforming hybrid ring has a non-uniform impedance ring structure coupled to four ports. Two of the ports function as input ports, the remaining two as output ports. An arbitrary...
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4307349 |
Impatt amplifiers
A protection circuit for an Impatt amplifier includes a voltage comparator which is arranged to sense the terminal voltage of the or each Impatt diode. When the comparator senses that a diode...
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4291279 |
Microwave combiner assembly
A microwave combiner assembly is described incorporating a coaxial transmission line having a plurality of diodes exhibiting negative resistance at high frequency mounted between the center...
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4282492 |
Modular multiple channel signal processor
A multiple channel amplifier providing both gain and/or phase shift to a microwave signal is formed of a set of transmission lines connected in parallel by means of a power splitter at the input...
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4270099 |
Circuit arrangement for generating and stably amplifying broadband rf signals
A circuit arrangement for generating and stably amplifying broadband rf signals. The circuit arrangement includes a first rectangular waveguide designed for operation in a frequency range below its...
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4249149 |
Ultra high-frequency circuit with resonant cavity equipped with pairs of peripheral diodes
A circuit capable of providing the negative resistance heart of oscillators or amplifiers in the 5-20 Gc/s frequency band, comprising a central resonant cavity and one or several peripheral...
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4242644 |
Pulse modulator for operating a device in the avalanche mode
An impatt diode in a radio frequency circuit is pulse modulated by a circuit comprising a constant current source providing threshold current and a pulsed current circuit providing drive current....
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4238747 |
Mode filter apparatus
A mode filter apparatus for preventing unwanted modes in a multi-moded structure utilizing a radial plurality of resonant slots on the bottom of the filter cavity. The top of the filter cavity...
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4189683 |
Solid state diode amplifier
An amplifier using a plurality of solid state diodes as the active elements is shown to comprise a plurality of amplifier channels fed, through a first radial line, by signals to be amplified and...
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4175257 |
Modular microwave power combiner
A modular microwave power combiner having a plurality of identical microwave diode amplifier circuits grouped in sets within the body of a modular unit which are electrically coupled in parallel to...
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4121174 |
Adjustable microwave power combiner for plurality of coaxial circuits
A power combining device for combining the microwave power from a plurality of solid state devices comprises a housing defining a resonator cavity with a plurality of co-axial microwave circuits,...
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4091334 |
Connection of a plurality of devices to a circular waveguide
A hollow cylinder that has a permittivity greater than the permittivity of air is coaxially disposed within a waveguide with the proximal end of the cylinder coplanar with one end of the waveguide....
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4086543 |
Travelling wave hybrid junction amplifier
The basic module of a microwave Travelling-Wave Hybrid Junction amplifier (TWHJ) consists of a hybrid junction (0°, 180° or 90° hybrid) combined with an appropriate phase-shifting element (π/2...
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4063186 |
Broadband millimeter wave amplifier
A millimeter wave amplifier having broadband characteristics in which a G diode or other two terminal negative resistance device having an integral heat sink is center mounted in a reduced height...
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4056784 |
Suppression of parametric oscillations in IMPATT amplifiers and oscillators
A balanced circuit for IMPATT amplifiers and oscillators, which includes at least one pair of anti-series connected matched avalanche diodes electrically connected to the junction of a balanced and...
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4050032 |
Avalanche diode amplifier
A microwave amplifier is disclosed using a nonreciprocal three port junction circulator. The amplifier uses a ferrite circulator having an input port, an output port and a third electrical port. A...
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4028637 |
Parametrically-stable negative resistance diode circuit
A parametrically-stable microwave circuit comprises in cascade a negative resistance diode, a stabilizing network, and a complementary type filter. The complementary type filter presents a...
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4025872 |
Negative resistance network
A network characterized at a reference terminal pair by a negative resistance at a frequency near nf o , where n is an integer greater than one. The network comprises a circuit element...
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4021750 |
Broad-band TRAPATT amplifier having a tapered idler circuit
A broad-band microwave amplifier including a semiconductor TRAPATT diode generating a microwave signal at its fundamental, second and third harmonic frequencies. Energy is extracted at the second...
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4017805 |
Compensated electron beam deflection device
An electron beam deflection amplifier having two spaced parallel electron ams and a pair of spaced collector electrodes for intercepting the beams to provide an output beam current. The beams are...
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4013974 |
Microstrip broadband avalanche diode amplifier
A broadband Impatt diode amplifier for microstrip includes a two-section quarter wavelength impedance transformer. Since the width of one transformer section exceeds a half wavelength, spurious...
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