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6838948 |
Oscillation apparatus and communication apparatus using the same
An oscillation apparatus has a multi-mode dielectric resonant element; a plurality of oscillation circuits, each including a line coupled to the dielectric resonant element and active devices...
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6825734 |
Oscillator module incorporating spiral looped-stub resonator
A transmission line configured as a looped-stub resonator is disclosed, which can be used as a frequency selective element for an oscillator, such as a VCO of a phase locked loop. The transmission...
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6778031 |
High-frequency circuit device using slot line and communication apparatus having high frequency circuit device
A high-frequency circuit device includes a substrate and a high-frequency circuit. The high-frequency circuit is provided on the substrate and has a signal line. The signal line is configured with...
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6771137 |
High-frequency oscillator
A high-frequency oscillator includes: a substrate composed of a dielectric material; a first transmission line of coplanar structure which is arranged on one principal surface of the substrate; an...
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6744402 |
High-frequency diode oscillator and millimeter-wave transmitting/receiving apparatus
An object of the present invention is to facilitate positioning of a metal member for mounting a high-frequency diode and of a dielectric strip, thereby remarkably improving control of oscillation...
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6737687 |
Field-effect transistor device having a uniquely arranged gate electrode
A field-effect transistor device includes an active area on a semiconductor substrate and a gate electrode, a source electrode, and a drain electrode are disposed on the surface of the active area,...
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6727766 |
Oscillator with dielectric resonator and electronic apparatus using the same
A dielectric substrate, a transistor, which is an active device, a varactor diode, which is a frequency-variable device, are mounted on one main surface of a package substrate to configure an...
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6720833 |
Modulator and oscillator for microwave and milliwave use
The present invention provides a modulator which has a high degree of modulation and a good modulation sensitivity. The modulator comprises an oscillating circuit and a resonator portion, and this...
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6717480 |
Multielement oscillator employing higher mode planar resonator
A multielement oscillator employing a higher mode planar resonator being provided with the planar resonator and a plurality of oscillating elements. The planar resonator has a substrate, a...
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6714089 |
High frequency signal source and method of generating same using dielectric resonator oscillator (DRO) circuit
A high frequency signal source and method of generating a high frequency signal is disclosed. An output signal is generated from a dielectric resonator oscillator and mixed with an output signal...
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6714086 |
Symmetric oscillators
A symmetrical oscillator includes a reactive element, such as an inductor, coupled between first and second active components, where the reactive element defines a fundamental resonant frequency...
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6714090 |
Voltage controlled oscillator with enhanced sensitivity of change of oscillation frequency
A voltage controlled oscillator comprises an oscillation transistor, a varactor diode, a resonance circuit which is coupled to the oscillation transistor, and a switching diode which changes over a...
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6603367 |
Voltage controlled oscillators including tunable dielectric devices
A voltage controlled oscillator includes an active element having a first connection point for connection to a voltage source and an output connection point. A tunable resonator including a first...
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6583677 |
Oscillator and an oscillator characteristic adjustment method
An oscillator including a circuit board having a dielectric layer therein; an oscillator circuit comprising its components and an inductor element, the components being mounted on a front surface...
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6570460 |
Voltage-tunable oscillator with dielectric resonator including a ferroelectric ceramic material
A voltage-controlled oscillator including a dielectric resonator having a ferroelectric ceramic material placed between two metallized surfaces and biased by an electric field created by a...
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6545552 |
Local oscillator using non-radiative dielectric waveguide
Disclosed is a local oscillator utilizing an NRD guide applicable to a millimeter wave integrated circuits. A Gunn diode is buried in a bottom of a housing so that a heat generated from the Gunn...
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6545553 |
Oscillator for generating microwave radiation, and method of assembling an oscillator
An oscillator comprising an oscillator body having a waveguide and a substantially cylindrical bore intersecting the waveguide, and a package comprising a heat sink having a substantially...
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6531928 |
High-frequency module
A voltage-controlled oscillator includes a multilayer substrate having two grounding electrodes. A bare chip IC, a grounding capacitance connected to the collector of a transistor in an oscillator...
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6504440 |
Dielectric resonance oscillation circuit
In a feedback type oscillation circuit including a first microstrip line connected to a signal input terminal of a transistor, a second microstrip line connected to a signal output terminal of the...
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6501341 |
Voltage controlled oscillator and communication device using same
A voltage control oscillation circuit is provided on the respective layers of a ceramic multilayer substrate, and an unbalanced transmission line and a balanced transmission line are provided to...
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6501338 |
Three-band switching oscillator suitable for size reduction
In a three-band switching oscillator, a switching circuit is provided to switch the operating conditions of a first and second voltage-controlled oscillator and to switch an oscillation frequency...
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6489853 |
Low phase noise oscillator
An oscillator is described which exhibits low phase noise characteristics. The oscillator circuit of the invention includes an inductor in series with a low value capacitor, this series combination...
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6486744 |
Low phase noise voltage-controlled oscillator and method of using the same
A low phase noise voltage-controlled oscillator (VCO) and method are provided. The VCO comprises a negative resistance generator and a resonator that reduces VCO phase noise.
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6459341 |
Voltage controlled oscillation device
A voltage controlled oscillation device includes a voltage controlled oscillator, fixed-frequency oscillator, frequency mixer, and frequency selector. The voltage controlled oscillator changes the...
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6456169 |
Voltage-controlled oscillator and electronic device using same
A voltage-controlled oscillator has a frequency of oscillation that is varied using a substrate on which the same circuit pattern as that of the voltage-controlled oscillator is printed. In a...
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6437653 |
Method and apparatus for providing a variable inductor on a semiconductor chip
One embodiment of the present invention provides an inductor with a variable inductance within a semiconductor chip. This inductor includes a primary spiral composed of a conductive material...
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6433646 |
Microwave oscillation circuit using a dielectric resonator
In a microwave oscillation circuit using a dielectric resonator, a bias resistor for determining a bias voltage supplied to a base terminal of a transistor is located in the neighborhood of a...
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6407645 |
Automated voltage control oscillator tuning
There is disclosed a first stub short bonded across conductive runners of a tuning stub at a distance preferably greater than a distance resulting in the desired frequency of operation of a voltage...
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6384691 |
Millimeter wave low phase noise signal source module
A high frequency signal source module includes a housing have a high-Q dielectric puck and a transition enclosure employing an antipodal finline transition. A circuit module connected to the high-Q...
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6380814 |
Voltage-controlled oscillator having a variable capacitive element with an electrode coupled to a resonator
A dielectric resonator is formed on a dielectric substrate. A pair of microstrip lines is formed to be electromagnetically coupled with the dielectric resonator. An end of each of the microstrip...
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6373344 |
High performance dual-YTO microwave synthesizer
A microwave synthesizer apparatus features very low phase noise, fine frequency resolution and wide tuning range coverage. The microwave synthesizer apparatus utilizes a fundamental offset source...
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6369664 |
Voltage controlled oscillator and electronic apparatus using same
A voltage controlled oscillator is provided which oscillates in a stable manner at a high frequency and obtains a large variable range of frequency. The oscillator includes a transistor, and...
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6369663 |
NRD guide Gunn oscillator
A Gunn diode which is formed by sequentially laminating a first semiconductor layer, an active layer and a second semiconductor layer onto a semiconductor substrate. The Gunn diode comprises first...
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6359520 |
Optically powered resonant tunneling device
An improved resonant tunneling device (RTD) oscillator is provided by supplying electrical power to the RTD device 23 using a photocell 21 and a light source 25 such that essentially no...
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6348840 |
Method of manufacturing a YIG oscillator
A variable-tuned type YIG oscillator accompanied with substantially no mechanical variations in the resonance circuit and a method of manufacturing the same are provided. An amplifier element,...
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6342820 |
Balanced oscillator having a short circuited quarter-wave paired line
A balanced oscillator comprises a frequency selective circuit and a balanced active circuit coupled with the frequency selective circuit. The frequency selective circuit includes a short circuited...
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6326856 |
YIG oscillator with resilient support structure
A YIG oscillator including a magnetic structure; an oscillator circuit board attached to the magnetic structure and carrying a YIG resonator positioned in an air gap of the magnetic structure; an...
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6326857 |
Microwave voltage controlled oscillator formed and located on a high dielectric loss substrate with a controlled circuit
A voltage controlled oscillator formed as a first layout with metallized areas by a planar technique is located on a high dielectric loss substrate. A second layout formed of metallized area for...
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6313711 |
Alignment method and system for YIG oscillator
A YIG oscillator is provided having a YIG enclosure with a top housing and a bottom housing, and a YIG sphere magnetically tuned by a permanent magnet. The YIG sphere has a zero temperature...
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6304153 |
Resonator tuning system
A resonator tuning system includes an apparatus coupled to a resonator for changing the resonator's resonance frequency. Tuning of the resonator is accomplished by varying the coupling to a...
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6300840 |
Microwave/millimeter-wave integrated circuit
A microwave/millimeter-wave integrated circuit (IC) realizes stable oscillation by reducing time-based variation of a load impedance. This IC connects an oscillator to an input terminal of a Lange...
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6300842 |
Arrangement for producing electrical oscillations
The arrangement for producing electrical oscillations in a Giga hertz region has a Gunn element, a housing in which the Gunn element is accommodated and which has an electrically conductive housing...
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6297707 |
Microwave oscillator with dielectric resonator
A microwave oscillator includes at least two active components and a dielectric resonator. The coupling between each active component and the dielectric resonator is of the transmission type and...
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6278335 |
Oscillator circuit
An oscillator circuit comprising first and second mutually electromagnetically couplable resonant circuits, the second circuit comprising a dielectric element and excitation means operable to...
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6275118 |
Push-push oscillator
A push--push oscillator is formed by (a) a resonator circuit including a transmission line having one-half wavelength and both ends of the line being left open, and a capacitance for frequency...
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6259331 |
YIG oscillator and method of manufacturing the same
A variable-tuned type YIG oscillator accompanied with substantially no mechanical variations in the resonance circuit and a method of manufacturing the same are provided. An amplifier element,...
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6259332 |
Microwave oscillator for obtaining the low phase noise characteristic
A microwave oscillator is disclosed, that comprises an FET, a series feedback short-circuited stub connected to the source terminal of said FET, a transmission line and a capacitor connected in...
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6252468 |
Signal generator with improved impedance matching characteristics
A signal generator 5 which generates one of two input signals to a frequency mixing circuit 1 for outputting a signal having a frequency which is a difference between frequencies of the two signals...
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6252470 |
Microwave oscillating circuit and remotely controllable "Kotatsu" using the same
An oscillating circuit adjusts its oscillating frequency through the following method. A tip-open type strip-line stub coupled to the base terminal of the transistor. An electrical length of the...
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6252469 |
Microwave/millimeter-wave injection/synchronization oscillator
In a microwave/millimeter-wave injection locked oscillator, an oscillation circuit (15) has an active element section (1), a resonant circuit (4) connected with the active element section (1) at...
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