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| Number | Title | Issue Date |
| 7095294 | Directional bridge coupler A directional bridge coupler includes a coaxial balun having a coaxial cable with a plurality of ferrite beads disposed about an outer conductor of the coaxial cable, and a circuit substrate accommodating a directional bridge coupled to an output of the coaxial brid... | 08/22/2006 |
| 6232843 | Plural coupled microwave oscillators providing phase shifted output signals A signal generator for producing a plurality of signals having the same frequency but a constant phase difference includes first and second cavity oscillators coupled to each other via an appropriate wall and coupling apertures. A first output signal is e... | 05/15/2001 |
| 6147563 | Coupled cavity oscillator producing output signals with a constant phase difference An improved method and system for generating quadrature phase shift keying signals for use in data transmission is provided. A pair of oscillators are slaved to the transmit frequency and produce two quadrature signal components with the same frequency bu... | 11/14/2000 |
| 5357138 | Coaxial wiring pattern structure in a multilayered wiring board In a thick multilayered wiring board, a coaxial signal wiring pattern is surrounded by upper and lower horizontal grounded conductive layers and vertical grounded conductive layers and the vertical conductive layers of conductive layers which surround the... | 10/18/1994 |
| 4730169 | Injection locking and tuning circuit for microwave diode oscillator A four-diode bridge is positioned within the cavity of a Gunn diode oscillator. A subharmonic signal is applied to the diode bridge and the diode bridge couples an odd harmonic of the injected signal into the cavity. The cavity is thus caused to resonate ... | 03/08/1988 |
| 4689583 | Dual diode module with heat sink, for use in a cavity power combiner A composite diode module is provided having an impedance matching member integrally formed within the module. The module includes a base member, a heat sink holder member having an aperture, a gold plated diamond heat sink which is disposed in the aforeme... | 08/25/1987 |
| 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 diode to form an equivalent parallel resonant circuit at one... | 11/18/1986 |
| 4588963 | Microwave power combiner with alternating diode modules A solid state microwave power combiner is disclosed having a central combining cavity with a plurality of coaxial oscillator circuits disposed about and coupled to the cavity. The oscillator circuits are oriented such that their longitudinal axes are para... | 05/13/1986 |
| 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 wire. Extending radially through the outer wall of the coaxia... | 02/18/1986 |
| 4568890 | Microwave oscillator injection locked at its fundamental frequency for producing a harmonic frequency output A microwave oscillator suitable for millimeter wavelengths comprises a Gunn diode (3) coupled to a waveguide (1) by a resonant-cap structure (5,6). The diode (3) generates microwave energy both at a fundamental frequency fo which is below the c... | 02/04/1986 |
| 4502023 | Method of fabricating a varactor/oscillator diode module for a tunable oscillator In a method of fabrication of a module formed by a semiconductor diode which oscillates in millimeter waves and by a variable-capacitance diode, the oscillating diode is mounted on a pedestal at the center of a support base. A ring of fused silica for sup... | 02/26/1985 |
| 4491806 | Resonant cavity with integrated microphonic suppression means The invention is a microphonics suppression means for a high frequency resonant cavity. The resonant cavity is used in a RF oscillator to generate UHF/VHF frequencies. The resonant cavity comprises an outer wall portion, a center conductor portion, a tuni... | 01/01/1985 |
| 4482871 | Wideband VCO including variable capacitive output coupling varactor for constant power output A wideband VCO including a coaxial cavity with a negative impedance semiconductor diode and a tuning varactor mounted in a center conductor thereof. A variable bias circuit connected to the tuning varactor for tuning the VCO through a predetermined range.... | 11/13/1984 |
| 4471325 | Power combiner with reentrant coaxial diode oscillators An improved combiner of microwave power out of a plurality of coaxial diode oscillators is shown to be made up of a circular cylindrical cavity dimensioned to operate in the TM020 mode at a selected microwave frequency, with such oscillators be... | 09/11/1984 |
| 4470021 | Power combiner for coaxial diode oscillators A power combiner using a circularly cylindrical cavity, dimensioned to support the TM020 mode, to combine the power from coaxial diode oscillators is shown to comprise: (a) a first plurality of such oscillators disposed about the periphery of s... | 09/04/1984 |
| 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 diodes, thus minimizing the tendency of the diodes to contribu... | 11/16/1982 |
| 4354165 | Time-delay-triggered TRAPATT oscillator having delay line with progressively increasing impedance A time-delay triggered TRAPATT oscillator in which the delay line impedance progressively increases from the diode end to a trigger element. Thus, all reflections except those from the trigger element are negative-going and help to reduce the rise in diod... | 10/12/1982 |
| 4340870 | Efficient higher order mode resonant combiner An efficient higher order mode resonant combiner in which a higher order mode accumulator cavity is adjusted to have the real part of its input characteristic impedance to be so minimized as to be less than the characteristic impedance Zo of th... | 07/20/1982 |
| 4309672 | Negative resistance oscillator/amplifier accumulator circuit A microwave oscillator/amplifier includes a plurality of TEM transmission lines each with a negative resistance device at one end and a lossy, matched termination at the other end. A resonant cavity is coupled to each TEM line so as to induce a parallel r... | 01/05/1982 |
| 4292610 | Temperature compensated coaxial resonator having inner, outer and intermediate conductors A coaxial cavity resonator comprising an outer conductor and an inner conductor coaxially disposed in the outer conductor with one end of the inner conductor being connected to an end wall of the outer conductor to establish a short-circuit relationship a... | 09/29/1981 |
| 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 conductor and the outer conductor of the transmission line. Each ... | 09/22/1981 |
| 4189684 | Microwave power combiner A microwave power combiner is shown to consist of a plurality of coaxial diode oscillators disposed on the periphery of a circularly cylindrical cavity operating in the TM020 mode, such cavity containing mode suppressor means to prevent any mod... | 02/19/1980 |
| 4097821 | Coaxial line IMPATT diode oscillator An improved solid state transmitter (and elements therefor) adapted particularly well to pulsed operation at radio frequencies is disclosed. Such transmitter includes the combination of: A crystal-controlled oscillator producing a continuous wave output s... | 06/27/1978 |
| 4053854 | Q switching microwave oscillator A housing defining a first cavity forming a transmission line and a negative impedance semiconductor device terminating one end of the transmission line in a negative impedance, the housing further defining a second cavity resonant at a predetermined freq... | 10/11/1977 |
| 4011527 | Temperature compensated microwave cavity transistor oscillator A temperature compensated cavity oscillator comprising a resonant coaxial cavity of which the outer conductor is constructed of dissimilar materials. The end walls and adjacent portion of the outer conductor of the coaxial cavity are made of a first condu... | 03/08/1977 |
| 4008446 | Microwave oscillation device whose oscillation frequency is controlled at the resonance frequency of a dielectric resonator A microwave oscillation device of the invention comprises a cut-off waveguide having a cut-off characteristic with respect to a frequency used. At one end of this cut-off waveguide is provided a coaxial line member, at one end of which is provided a micro... | 02/15/1977 |
| 3931587 | Microwave power accumulator Disclosed is a microwave power accumulator including a plurality of coaxial oscillator circuits, each tightly coupled to a single common output combining resonant cavity. Each of the coaxial circuits includes a negative resistance diode at one end and a l... | 01/06/1976 |
