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3878480 |
Millimeter wave oscillator with a cavity resonator
A millimeter wave oscillator has a case of block construction defining a waveguide passageway with a waveguide flange at the output end integral with the case. A plunger with a half-round surface...
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3873934 |
Devices for coupling microwave diode oscillators and amplifiers to power accumulation structures
Devices for coupling microwave diodes and microwave diodes mounted in oscillator or amplifier circuits for quasi-optical power accumulation structures, and particularly to elliptical cavity...
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3869681 |
Microwave cavity oscillator having a frequency tuning element
An open ended microwave cavity oscillator comprises a microwave diode forming part of a coaxial center conductor secured to the cavity's base wall. A tuning rod of low loss dielectric material is...
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3866144 |
Microwave oscillator
A microwave oscillator comprising a rectangular waveguide; a Gunn diode oscillation element provided in the waveguide at the center; a metal post for impressing D.C. bias voltage on the Gunn diode...
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3859657 |
SECOND HARMONIC FILTER FOR HIGH FREQUENCY SOURCE
A second harmonic filter for a doppler radar intrusion system or the like which includes a cavitiy with an elongated coupling port containing an active device for generating microwave energy which...
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3858121 |
SOLID STATE MICROWAVE OSCILLATOR WITH STABILIZING RESONATOR AND AFC LOOP
A stabilized solid-state oscillator comprising a free running oscillator with its frequencies made variably by a variable reactance element, a high-Q fundamental cavity resonator coupled to the...
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3858123 |
NEGATIVE RESISTANCE OSCILLATOR
A negative resistance oscillator consisting of two parallel waveguides coupled together by a directional resonator. The electric coupling point between the resonator and the waveguides is spaced...
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3848201 |
TURNABLE SOLID STATE LOCAL OSCILLATOR
A wide band single control tunable power source consisting of a transistor scillator driving a single stage high order step recovery diode multiplier. The base and emitter of the transistor are...
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3843937 |
SOLID STATE OSCILLATOR
A solid state oscillator in which a coaxial side arm is attached to a waveguide at an appropriate position in a manner to intersect it at right angles thereto; A Gunn diode, Impatt diode or like...
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3842361 |
MICROWAVE AMPLIFIER
A double-tuned microwave amplifier comprising an outer conductive shell, a controlled charge carrier device disposed within said shell, and means operatively dividing the shell into two radial...
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3838356 |
PARALLEL CONNECTED DIODE DEVICE WITH SUPPRESSION OF ASYMMETRIC MODES
When a plurality of negative resistance packaged diodes are connected in electrical parallel and placed in a single resonant cavity, undesired asymmetric modes of oscillation result unless the...
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3831110 |
MULTI-AXIS CAVITIES FOR MICROWAVE SEMICONDUCTORS
Multi-axis resonant cavities are provided in which a microwave semiconductor oscillator, e.g., an L.S.A. diode, operates in a below cut off mode with respect to the propagation characteristics of...
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3824485 |
STABILIZED OSCILLATOR WITH OUTPUT HAVING HIGH SPECTRAL PURITY
A stable low-noise high frequency signal source comprises a primary high frequency generator stabilized by a high-quality-factor transmission resonator, the primary generator output also being...
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3810045 |
PUSH-PULL TRANSFERRED-ELECTRON DEVICE CIRCUIT
A pair of transferred-electron devices, such as Gunn diodes, are spaced apart in a hollow microwave conductor operating in a TE or TM mode. The Gunn devices are coupled in energy exchanging...
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3803513 |
SOLID STATE OSCILLATOR
A microwave solid state oscillator in which a hybrid circuit having connected thereto a plurality of resonators with different resonance frequencies and a matched dummy load is coupled to a solid...
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3792375 |
SUPPRESSION OF SPURIOUS BIAS CIRCUIT OSCILLATIONS IN IMPATT OSCILLATORS
Spurious oscillations in the dc bias circuit of an Impatt oscillator are suppressed by including in the bias circuit a filter which is external of the microwave resonator. The filter includes an...
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3789322 |
MICROWAVE CAVITY TUNING LOOP INCLUDING A VARACTOR
A coupling loop having a varactor in series therewith extends into a microwave cavity, which in one embodiment includes a coaxially aligned transferred electron device (TED) oscillator, with...
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3787782 |
MICROWAVE DEVICE
A microwave device comprising a hollow spacing cylinder of a dielectric material which is closed by electrically conductive contact members on its end faces, a first contact member being composed...
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3775694 |
AMPLIFIER FOR MICROWAVES COMPRISING RADIAL WAVEGUIDE-HYBRID COUPLER
A radial waveguide-3dB hybrid coupler in a circular configuration comprises two coaxial radial wave-guides, one with an input port and one with an output port, having a branch-guide hybrid coupler...
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3775701 |
SEMICONDUCTOR DIODE MOUNTING AND RESONATOR STRUCTURE FOR OPERATION IN THE EHF MICROWAVE RANGE
A semiconductor mounting and resonator structure particularly suitable for avalanche diode applications in the EHF microwave range, characterized in having a high degree of mechanical reliability,...
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3764938 |
RESONANCE SUPPRESSION IN INTERDIGITAL CAPACITORS USEFUL AS DC BIAS BREAKS IN DIODE OSCILLATOR CIRCUITS
A modified stripline interdigital capacitor has slots coupled into the capacitor gap. These slots provide reactive loading to the slot transmission line formed by the gap. They are positioned and...
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3753153 |
DOUBLE PULSE BIAS STABILIZATION OF A MICROWAVE OSCILLATOR USING AN AVALANCHE DIODE OPERATIVE IN THE ANOMALOUS MODE
The operation of a microwave oscillator using an avalanche diode operative in the anomalous mode is stabilized by the use of a double pulse, direct current bias signal. The double pulse bias signal...
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3745479 |
MICROWAVE OSCILLATOR STRUCTURE FOR PARALLEL OPERATION OF SOLID-STATE DIODES
A solid-state oscillator circuit suitable for parallel operation of the diodes comprising a waveguide and at least two parallel-plate resonators provided in the waveguide. Respective diode for the...
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3737804 |
INJECTION-TYPE FREQUENCY-LOCKED AMPLIFIER
An injection-type frequency-locked amplifier having separate input and output terminals as opposed to a single input/output terminal. The input impedance of the amplifier is selected such that a...
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3737802 |
MICROWAVE OSCILLATOR WITH MULTIPLE GUNN DIODES IN A CAVITY RESONATOR
A solid state oscillator of a novel and inexpensive construction incorporates a plurality of microwave energy generating diodes, suitably Gunn diodes, for providing output powers in excess of that...
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3733560 |
ELLIPTICAL STRUCTURE FOR COMBINING THE POWER OF MANY MICROWAVE SOURCES
A non-resonant microwave cavity shaped substantially in the form of a right elliptical cylinder, means for introducing microwave energy at one focus of the elliptical cavity and removing microwave...
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3721919 |
HIGH EFFICIENCY MODE PLANAR MICROCIRCUIT HIGH FREQUENCY SIGNAL GENERATOR
An active high-efficiency-mode semiconductor diode is coupled for the generation of oscillating high frequency electromagnetic fields in a planar transmission line network, the apparatus taking the...
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3718869 |
MICROWAVE OSCILLATOR WITH COAXIAL LEAKAGE OUTPUT COUPLING
An improved coupling arrangement between a cavity resonator with associated icrowave generator and the load. The cavity includes a radial line coupling in the form of a disc capacitively coupled to...
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3716854 |
RADAR DETECTOR
A pulsed radar detector the repetition rate of which is a function of the phase of the feedback signal in the radio frequency (rf) oscillator which produces the pulse of rf energy. A phase-shift...
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3715686 |
PAIRED NONLINEAR ACTIVE ELEMENTS IN A WAVEGUIDE CAVITY ADAPTED TO SUPPORT ORTHOGONAL TE MODE WAVES AND TE MODE WAVES
A pair of nonlinear semiconductive active devices are located in a cavity dimensioned to support electromagnetic waves at the desired fundamental frequency in the TE 10 mode. The cavity is further...
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3715674 |
ELECTRICALLY CONTROLLED REFLECTION OF ACOUSTIC SURFACE WAVES
A circuit is provided for tuning out the reactance established at the electrical port of an acoustical surface wave transducer thereby providing near perfect reflection of the acoustic surface...
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3714605 |
BROAD BAND HIGH EFFICIENCY MODE ENERGY CONVERTER
An active high-efficiency-mode semiconductor diode energy converter for generating and amplifying high frequency electromagnetic energy over a broad band frequency band utilizes balanced circuits...
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3713041 |
INJECTION TYPE FREQUENCY LOCKED OSCILLATOR APPARATUS
An injection-type frequency-locked oscillator provided with novel means for monitoring the operation of the oscillator. An injection input wave is applied through a directional coupler to an...
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3711792 |
SOLID STATE OSCILLATOR HAVING SEMICONDUCTOR ELEMENTS MOUNTED IN A CAVITY RESONATOR
A solid state oscillator comprising a cavity resonator having an output portion, at least two semi-conductor elements disposed in an equi-phase plane of an electromagnetic field, and means for...
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3702977 |
DEVICE FOR GENERATING MICROWAVE OSCILLATIONS
A microwave oscillator including two semiconductor devices of a kind which can be switched between two state or which becomes unstable or exhibits negative resistance under the effect of an...
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3701049 |
MICROWAVE OSCILLATOR EMPLOYING A CAVITY RESONATOR HAVING DIELECTRIC WALLS USED AS A QUARTER WAVE IMPEDANCE TRANSFORMER
A microwave oscillator comprising a semiconductor device employed in a cavity resonator having dielectric walls. The cavity is matched to external loads by utilizing the dielectric walls of the...
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3701050 |
SOLID STATE MICROWAVE OSCILLATING DEVICE
The present invention provides a device for producing microwave oscillations which generally comprises a solid state oscillating element and a cavity resonator, said element comprising a...
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3697893 |
MICROWAVE MODULATOR HAVING INPUT MODULATION SIGNAL PROBE WITH ADJUSTABLE ELECTRICAL CHARACTERISTICS
A microwave resonant cavity modulator including an input modulation signal probe with means for adjusting the electrical characteristics of said probe for improving modulation sensitivity and...
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3693118 |
VARIABLE TUNING ARRANGEMENT FOR A STRIP TRANSMISSION LINE CIRCUIT
A tuning arrangement is provided for a strip transmission line circuit of the type including a ground plane or conductor and a narrow conductor spaced from the ground plane by a dielectric...
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3691479 |
MULTI-DIODE SINGLE CAVITY MICROWAVE OSCILLATORS
The disclosure herein relates to single-cavity microwave oscillators in general, and multi-diode single cavity microwave oscillators in particular. The disclosure further relates to methods for...
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3688219 |
ELECTRICALLY AND MECHANICALLY TUNABLE MICROWAVE POWER OSCILLATOR
A high efficiency, negative resistance microwave power oscillator is disclosed which is tunable over a wide frequency range by applying a variable voltage to a varactor which is coupled to the...
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3683298 |
MICROWAVE APPARATUS USING MULTIPLE AVALANCHE DIODES OPERATING IN THE ANOMALOUS MODE
The terminals of a first avalanche diode are shunt coupled to a microwave transmission line. The terminals of opposite polarity of at least one other avalanche diode are also shunt coupled to the...
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3680002 |
MICROSTRIP MICROWAVE OSCILLATORS
A microwave oscillator in microstrip form is single-tuned simultaneously at both fundamental and second harmonic frequencies to enhance efficient generation of fundamental frequency output voltage....
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3673514 |
SCHOTTKY BARRIER TRANSIT TIME NEGATIVE RESISTANCE DIODE CIRCUITS
In a preferred form, a negative resistance diode comprises a semiconductor wafer contained between two Schottky barrier contacts. The diode is biased below avalanche breakdown, but above a critical...
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3668551 |
SOLID STATE MICROWAVE OSCILLATOR WITH CERAMIC CAPACITANCE TEMPERATURE COMPENSATING ELEMENT
An enclosed Gunn effect diode is disposed within a microwave resonant cavity. A capacitive element of dielectric ceramic such as titanium oxide having a negative temperature coefficient of...
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3668553 |
DIGITALLY TUNED STRIPLINE OSCILLATOR
A digitally tuned microwave microstrip oscillator is disclosed. The oscillator includes a resonant section of stripline having a Gunn diode connected between the stripline and ground plane at a low...
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3665341 |
TEMPERATURE COMPENSATED CAVITY FOR A SOLID STATE OSCILLATOR
A temperature compensated cavity for a solid state oscillator in which part of the conductive plates forming the cavity resonator is constituted by a movable plate, said movable plate being secured...
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3662183 |
CONTINUOUSLY TUNABLE OPTICAL PARAMETRIC OSCILLATOR
The gain curve peak and the signal axial modes are made to track together in a continuously tunable, singly resonant optical parametric oscillator (SRO) in which nonresonant pump radiation and...
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3662285 |
MICROWAVE TRANSDUCER AND COUPLING NETWORK
An active semiconductor array coupled to high frequency fields supported by a symmetric passive array of radial transmission line elements serves as a high frequency transducer for amplifying the...
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3659223 |
MICROWAVE OSCILLATOR WITH TWO OR MORE PARALLELED SEMICONDUCTIVE DEVICES
Two or more paralleled negative resistance semiconductive devices are mounted inside a microwave cavity in a plane transverse to the direction of microwave propagation. The devices are located at...
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