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7613434 |
Multiplexer and wireless receiver
A multiplexer includes: a first band-pass filter for a first channel, which is formed in a microstrip line on a dielectric substrate and has a first branching characteristic having a center...
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7512394 |
Wideband up-conversion mixer
An up-conversion mixer includes a first and a second hybrid couplers and a first and a second traveling-wave mixers is disclosed. The first hybrid coupler receives an input intermediate frequency...
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7509112 |
Wideband image rejection mixer
An image rejection mixer including a first and a second hybrid couplers and a first and a second traveling-wave mixers is disclosed. The first hybrid coupler divides an input radio frequency (RF)...
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7302249 |
High dynamic range mixer apparatus and balun therefor
A wide dynamic range mixer which has a high linearity passive balun fabricated on a Si substrate for receiving an input RF signal and an active balun for receiving a local oscillator signal. The...
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7164903 |
Integrated N-way Wilkinson power divider/combiner
An integrated N-way Wilkinson power divider is described. In one embodiment, the N-way Wilkinson power divider uses a conductor layer with a cross-over (or cross-under) resistor insulated from the...
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7149494 |
Demultiplexer and communication device
A demultiplexer includes an antenna terminal, a reception filter connected to the antenna terminal, a transmission filter connected in parallel to the reception filter with respect to the antenna...
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7035617 |
High power block upconverter
A system and method for high power block upconversion having a stand-alone and surface-mountable component is provided. The HP-BUC system of the invention provides a “drop-in” component capable...
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7005726 |
Semiconductor device with an improved transmission line
A semiconductor device with integrated circuits includes superimposed layers provided at different levels on a substrate, and including a metal strip ( 3 ) formed in a reference layer and through...
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6993312 |
Double balanced diode mixer with high output third order intercept point
A double balanced mixer consisting of an RF balun, a local oscillator balun and a diode “quad” bridge circuit connected between the two baluns and where the IF output is taken at the center tap...
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6970688 |
Local oscillator signal divider and low-noise converter employing the same
A rat race circuit has an annular transmission line formed on a microstrip dielectric substrate. A terminal for port 1 is formed at any given position of the annular transmission line. Respective...
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6931246 |
Line coupling structure, mixer, and receiving/transmitting apparatus comprised of suspended line and dielectric waveguide
A line coupling structure for coupling a dielectric waveguide to a suspended line has the dielectric waveguide including dielectric strips and two conductor plates that are approximately parallel...
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6901249 |
Complementary bipolar harmonic mixer
A 3-terminal harmonic mixer which solves the conversion gain, port impedance and isolation problems associated with known harmonic mixers. In particular, the 3-terminal harmonic mixer in accordance...
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6879220 |
Switchless combining of multi-carrier coherent and incoherent carriers
The invention is a combiner and a method for selectively combining modulated signals. The combiner includes a first modulator ( 12 ) with a selective input which receives at least one input signal...
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6850751 |
Non-reciprocal circuit device, method of manufacturing, and mobile communication apparatus using the same
A non-reciprocal circuit device has a length, a width, and a thickness denoted respectively by L 1, L 2, and L 3, and the overall dimensions of 2.5 mm<L 1 <7.0 mm, 2.5 mm<L 2 <7.0...
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6850149 |
Network control method and apparatus for home appliance
An apparatus and method for controlling a home appliance network is disclosed, in which a home server is established at low cost so that an external user can easily control the operation of home...
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6826393 |
Mixer circuit having component for frequency conversion
A mixer circuit according to the present invention includes a first differential transistor pair of two transistors, a second differential transistor pair of two transistors, an impedance element...
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6810241 |
Microwave diode mixer
A mixer having a diode quad, and which receives two RF signals at an RF input balun having primary and secondary windings. A resonant circuit arrangement includes at least a capacitor circuit...
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6748207 |
Power distributing and synthesizing device and mobile communication equipment using same
A power distributing and synthesizing device which comprises first to third signal terminals, first and second transmission lines and a resistor. The first signal terminal is provided at the...
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6738611 |
Image rejection sub-harmonic frequency converter realized in microstrip, particularly adapted to be use in mobile communication equipments
It is described an image rejection, sub-harmonic frequency converter, realized in microstrip, particularly adapted to be used in mobile communication equipment, The converter avails of two...
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6703965 |
Motion detector
The present motion detector unit effectively suppresses harmonic frequencies and is cost-effective to build. The motion detector unit includes a main casing which houses the main microwave circuit...
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6687494 |
Low power radio telephone image reject mixer
An image reject mixer for a low power battery operated radio telephone application. First and second doubly balance mixer circuits are connected to receive a differential radio frequency signal....
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6675005 |
Printed single balanced downconverter mixer
A single balanced downconverter includes an insulated substrate with a primary circuit and a secondary circuit, each consisting of an open annular foil element, located on opposite sides of the...
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6597899 |
Image reject mixer circuit arrangements
An image reject mixer arrangement 1 comprises a transconductor 2, first and second mixer cores 3 and 4, first and second phase shifters 5 and 6 and a summer or combiner 7. The mixer...
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6510314 |
Mixer circuit with output stage for implementation on integrated circuit
An output stage of a double balanced mixer having a first intermediate port and a second intermediate port includes an operational amplifier, an impedance and first and second current source...
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6389274 |
Subharmonic frequency converter for applications to millimetric radio waves
A frequency converter that includes a first low-pass filter and a band-pass filter with a first end operatively connected to a first end of the first low-pass filter. The frequency converter also...
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6373345 |
Modulator structure for a transmitter and a mobile station
A modulator having a high signal-to-noise ratio. The modulator comprises a switching arrangement and a driver arrangement coupled to the switching arrangement, said driver arrangement comprising...
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6275689 |
Double-balanced mixer
The double-balanced mixer includes a diode ring (D1, D2, D3, D4) with respective balancing circuit portions for a local oscillator signal (LO) and a high frequency signal (RF) and a...
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6263198 |
Multi-layer printed wiring board having integrated broadside microwave coupled baluns
A microwave broadside coupled balun integral in a multi-layer printed wiring board formed by broadside coupled conductors embedded in the multi-layer printed wiring board. The balun may be used to...
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6208214 |
Multifunction high frequency integrated circuit structure
A multifunction high frequency integrated circuit structure and circuit configuration includes a resonator or oscillator circuit coupled to a buffer amplifier by way of a stripline coupler. The...
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6198912 |
Frequency converter for the application on millimetric radio waves
The following description regards a frequency converter (1) for applications on millimetric radio waves. The circuit structure comprises a diplexer filter realized in thin film on an alumina layer...
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6163686 |
Signal selecting circuit
A signal selecting circuit comprises a first switch means connected between a first input terminal and a common output terminal, a second switch means connected between a second input terminal and...
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6115594 |
Frequency converter used in a microwave system
A frequency converter for a microwave system includes: a balun having a slot line connected in a parallel T-junction with a first microstrip line for receiving a radio frequency signal; first and...
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6094570 |
Double-balanced monolithic microwave integrated circuit mixer
A double-balanced monolithic microwave integrated circuit mixer is fabricated on a GaHs substrate with a radio frequency microstrip balun formed thereon and a local oscillator microstrip balun...
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6072999 |
Receiving apparatus
A receiving apparatus is presented, in which a channel frequency can be selected over a wide band with an increased attenuation at an image frequency and/or at a local oscillation frequency by...
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6072824 |
Circuit arrangement for reducing intermodulation in a bandpass filter system
A circuit arrangement that reduces selected intermodulation. The circuit arrangement includes a signal amplifier coupled to a bandpass filter via an electrical path. Signal energy outside the...
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6041224 |
DBS tuner for satellite broadcasting receivers
A DBS tuner for satellite broadcasting receivers, includes an attenuating filter (trap circuitry) composed of a microstrip line having an open-ended load terminal which projects from the RF signal...
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6029059 |
Quadrature mixer method and apparatus
A quadrature mixer architecture that mixes the in-phase and quadrature phases within the same cell. The input voltage is applied to the base of a voltage conversion transistor, which converts the...
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6026286 |
RF amplifier, RF mixer and RF receiver
A low voltage silicon bipolar RF (radio frequency) receiver front end includes a low noise preamplifier and double-balanced mixer. The receiver incorporates monolithic microstrip transformers for...
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6008763 |
Flat antenna
A flat aperture-coupled antenna with a multilayer structure is disclosed. A rear side of the antenna comprises a metal reflector device including a hollow structure (3, 5) with separate box-like...
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5999572 |
Digital broadcasting receiver tuner
A digital broadcasting receiver tuner that demodulates excellently a digital signal by substantially reducing a second local oscillation signal that strays from a second frequency conversion stage...
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5987315 |
Diode circuit in dielectric waveguide device, and detector and mixer using the diode circuit
A diode circuit in a dielectric waveguide device designed to improve the facility with which a circuit substrate is mounted in the dielectric waveguide, to make matching between a dielectric...
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5983089 |
Slotline-mounted flip chip
First and second slotlines are mounted on an electrically insulating substrate having a planar face with a connection region. Each slotline has first and second, spaced-apart coplanar conductors...
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5978666 |
Slotline-mounted flip chip structures
First and second slotlines are mounted on an electrically insulating substrate having a planar face with a connection region. Each slotline has first and second, spaced-apart coplanar conductors...
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5977874 |
Relating to motion detection units
A motion detection unit for detecting motion by means of Doppler frequency shift which comprises: a microwave circuit board comprising an oscillator, a hybrid coupler circuit element and a mixer;...
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5970401 |
Balanced-type mixer having circuit board
A balanced-type mixer having easier mounting of a circuit board into a dielectric line apparatus, easier matching between a dielectric line and diodes, and reduced conversion loss. A first...
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5963858 |
Method and apparatus for mixing signals
An apparatus includes a first mixer port (12), a second mixer port (14), a third mixer port (16), a first hybrid device (20) responsive to the first mixer port (12) and having a first and a second...
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5949297 |
Balanced modulator
A balanced modulator has a pair of diodes, a plurality of line patterns including a balance-to-unbalance converter, the line patterns including lines extending toward and connected to the diodes,...
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5920245 |
Nonradiative dielectric line apparatus including a specifically oriented circuit board
The ease of mounting a circuit board on a nonradiative dielectric line is improved, the degree of freedom of conductor film patterns formed on the circuit board is increased, and the degree of...
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5917386 |
Printed circuit transformer hybrids for RF mixers
A high frequency partial transformer hybrid includes a first divided circular conductive element affixed to one side of an insulated substrate and a second split circular conductive element affixed...
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5903827 |
Single balanced frequency downconverter for direct broadcast satellite transmissions and hybrid ring signal combiner
A monolithic microwave integrated circuit (MMIC) semiconductor chip, for use with a hybrid coupler, in a frequency downconverter. The chip has a first input lead for receiving a first combined...
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