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| Number | Title | Issue Date |
| 8130059 | On chip slow-wave structure, method of manufacture and design structure An on-chip slow-wave structure that uses multiple parallel signal paths with grounded capacitance structures, method of manufacturing and design structure thereof is provided. The slow wave structure includes a plurality of conductor signal paths arranged in a subst... | 03/06/2012 |
| 7928816 | Delay filter module A delay filter module comprising at least one dielectric boneblack ceramic band pass filter and a circuit for compensating/equalizing the signal delay produced by the delay filter. In one embodiment, the circuit is defined by a hybrid coupler defining at least two p... | 04/19/2011 |
| 7683737 | Broadband phase shifter A phase shifting method and a phase shifter are provided. The phase shifter comprises a first (200) and a second (202) transmission line structure in parallel, the structures having a common input, each structure comprising cascaded forward and backwar... | 03/23/2010 |
| 7589603 | Phase shifter having power dividing function for providing a fixed phase shift and at least two phase shifts based on path length Disclosed is a phase shifter having a power dividing function. The phase shifter includes: an input port for receiving a radio frequency (RF) signal; a power dividing unit for dividing the RF signal into a first divided signal of which phase is to be varied and a se... | 09/15/2009 |
| 7557675 | Broad band mechanical phase shifter Mechanical phase shifter which from an external feed signal obtains several signals out of phase with each other, each one of which is applied to an antenna of an array, so that the result of the interference of the radiated fields provides a radiation pattern. The ... | 07/07/2009 |
| 7408424 | Compact RF circuit with high common mode attenuation A compact RF differential circuit has a first differential I/O port comprising a first pair of signal carrying terminals which is connected to a source termination and a second differential I/O port comprising a second pair of signal carrying terminals which is conn... | 08/05/2008 |
| 7369020 | Transmission line comprising a plurality of serially connected rotational direction-reversal structures One transmission line includes a first signal conductor which is placed on one surface of a substrate formed from a dielectric or semiconductor and which is formed so as to be curved toward a first rotational direction within the surface, and a second signal conduct... | 05/06/2008 |
| 7365618 | High-frequency circuit device, high-frequency module, and communication apparatus A high-frequency circuit device, a high-frequency module, and a communication apparatus, which prevent generation of an undesired wave to prevent electrical power loss and undesired coupling, are provided. The high-frequency circuit device includes a first slot line... | 04/29/2008 |
| 7358833 | Method and apparatus for signal processing using electrowetting An apparatus comprising a tuning device having at least one control electrode and a ground electrode located over a substrate and an electrically conductive fluid in contact with the control and ground electrodes. The tuning device also has at least one electrical t... | 04/15/2008 |
| 7348863 | Simple time domain pulse generator A pulse generating circuit and related method, for producing extremely narrow pulses for use in monolithic microwave integrated circuits (MMICs) for radar, high-speed sampling, pulse radio and other applications. A sinusoidal input signal is supplied to two nonlinea... | 03/25/2008 |
| 7332983 | Tunable delay line using selectively connected grounding means A tunable delay line system includes a stripline and a plurality of cross-over lines. The stripline defines a propagation delay characteristic. The plurality of cross-over lines are each spaced from and extend with an orientation that is nonparallel with the stripli... | 02/19/2008 |
| 7333790 | Method and apparatus for generating arbitrary phase shift using a phase shifter based on adding two perpendicular vectors with variable gains A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a secon... | 02/19/2008 |
| 7321274 | RF switch A RF switch can be used in a wide frequency range and can be manufactured at a low cost. The RF switch changes a signal passing through a waveguide with a variable device that is switchable between the first state in which the variable device has a high resistance a... | 01/22/2008 |
| 7301422 | Variable differential phase shifter having a divider wiper arm A variable differential phase shifter including an isolation element providing good isolation between output ports, good return loss and reduced reflections. In one embodiment a Wilkinson divider is incorporated in the wiper arm of a wiper type variable differential... | 11/27/2007 |
| 7295020 | Cap at resistors of electrical test probe A lossy dielectric device dissipates, absorbs, and/or dampens electric fields. The lossy dielectric device may be used with any transmission path, such as a transmission line or resistor in a probe head. The lossy dielectric device preferably includes a lossy dielec... | 11/13/2007 |
| 7283018 | Variable matching circuit, variable resonance circuit, variable phase-shifting circuit and variable attenuation circuit each having variable-capacitance capacitor In a variable matching circuit including an impedance device and a variable-capacitance capacitor, the variable-capacitance capacitor is formed in a manner that a plurality of variable-capacitance devices using thin film dielectric layers whose dielectric constants ... | 10/16/2007 |
| 7274331 | Phase-shifting system using a displaceable dielectric and phase array antenna comprising such a phase-shifting system A phase-shifting system for electrically swiveling the direction of a beam of an antenna field includes several radiators with two planes of polarization. The phase-shifting system includes two jointly changeable phase shifters with microstrip lines associated there... | 09/25/2007 |
| 7263760 | Method for making a slow-wave ridge waveguide structure A method of fabricating a ridge waveguide filter having a slow-wave structure. The ridge waveguide is formed of a conductive sidewall-from metallic materials and may be in the form of a hollow tube, such as a rectangular hollow tube or a circular hollow tube, for ex... | 09/04/2007 |
| 7259641 | Microelectromechanical slow-wave phase shifter device and method The present invention provides a method and apparatus for a monolithic device utilizing cascaded, switchable slow-wave CPW sections that are integrated along the length of a planar transmission line. The purpose of the switchable slow-wave CPW sections elements is t... | 08/21/2007 |
| 7242272 | Methods and apparatus based on coplanar striplines Methods and apparatus involving semiconductor devices based on coplanar striplines (CPS). In one example, high-speed microelectronic devices based on coplanar stripline implementations support differential signals in a range of approximately from 1 Gigahertz to at l... | 07/10/2007 |
| 7242265 | Element of parallel flat plate line type, a circuit board An element of parallel flat plate line type suitable for operation at a higher speed and with a higher frequency is provided. The element is characterized by including a first metallic member 1 including a flat plate section 11 and a projected section ... | 07/10/2007 |
| 7239218 | Phase shifter having switchable high pass filter and low pass filter paths and impedance adjustment circuits A phase shifter with a low insertion loss in which impedance mismatch at a point in rear of a high-pass filter or a low-pass filter in the signal flow direction is reduced and difference in insertion loss or phase shifting error across a high-pass filter- low-pass f... | 07/03/2007 |
| 7239220 | Adjustable delay transmission line A transmission line includes a signal conductor and at least one varactor diode capacitively coupled to the signal conductor. The transmission line's signal path delay is a function of its shunt capacitance, and the varactor's capacitance forms a part of the transmi... | 07/03/2007 |
| 7239764 | Optical waveguide device with reduced driving voltage The present invention provides an optical waveguide device wherein a driving voltage to be applied is reduced. The optical waveguide device comprises a substrate cut in a Z-axis direction and having an electro-optical effect, an interference type optical waveguide f... | 07/03/2007 |
| 7239219 | Miniature RF and microwave components and methods for fabricating such components RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may include switches, inductors, ant... | 07/03/2007 |
| 7233217 | Microstrip phase shifter A phase shifter adjusts the phase between two segments of an RF feed line that are fed with the phase shifter. Specifically, the phase shifter adjusts the phase between two signals in RF feed line segments by changing the electrical path lengths that RF energy trave... | 06/19/2007 |
| 7224506 | Single side band modulation device A single side band modulation device includes a first Mach Zehnder interferometer and a second Mach Zehnder interferometer. The first Mach Zehnder interferometer includes at least two output arms, and the second Mach Zehnder interferometer includes at least two outp... | 05/29/2007 |
| 7221220 | Method and apparatus for low-frequency bypass in broadband RF circuitry A method of processing an input broadband signal in RF circuitry includes extracting low-frequency components from the input broadband signal, processing the low-frequency components in low-frequency bypass circuitry, and adding the processed low-frequency component... | 05/22/2007 |
| 7221239 | Variable power divider A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phas... | 05/22/2007 |
| 7218285 | Metamaterial scanning lens antenna systems and methods The present invention is directed to systems and methods for radiating radar signals, communication signals, or other similar signals. In one embodiment, a system includes a controller that generates a control signal and an antenna coupled to the controller. The ant... | 05/15/2007 |
| 7209092 | Symmetric, shielded slow wave meander line A standard slow wave meander line having sections of alternating impedance relative to a conductor plate is provided with a top shield connected to the conductor plane for the purpose of lowering the resonant frequency of narrow band antennas and lowering the low fr... | 04/24/2007 |
| 7200343 | Drive control apparatus and drive control method for optical modulator The present invention aims at providing a drive control apparatus and a drive control method with a simple configuration, which can also reliably compensate for operating point fluctuations of an optical modulator driven in accordance with a drive signal correspondi... | 04/03/2007 |
| 7199570 | Multi-channel radiometer imaging system A radiometer includes a housing and an RF board carried by the housing. A hybrid and amplifier circuit receives an unknown signal and a known reference signal. A switch receives signals as inputs from the hybrid and amplifier circuit and switches between the inputs.... | 04/03/2007 |
| 7195989 | Electrochemical fabrication methods using transfer plating of masks Three-dimensional structures are electrochemically fabricated by depositing a first material onto previously deposited material through voids in a patterned mask where the patterned mask is at least temporarily adhered to a substrate or previously formed layer of ma... | 03/27/2007 |
| 7193486 | Tunable, maximum power output, frequency harmonic comb generator A comb frequency generator that is tunable to vary the width of the pulses in the output signal and achieve a maximum power output at different harmonic frequencies. A wavefront compression device receives a sinusoidal input signal and provides wavefront compression... | 03/20/2007 |
| 7187252 | Apparatus for delaying radio frequency signals In the present technique for transmitting and delaying radio frequency signal transmission, an RF delay filter (102) is provided with at least one high permittivity material coaxial delay element (104) with each having an input port (114) and an... | 03/06/2007 |
| 7173503 | Multibit phase shifter with active and passive phase bits, and active phase bit therefor An RF phase shifter includes the cascade of active and passive RF phase shift bits, having different phase increments. The active phase shift bit includes a FET with source and drain. First and second RF single-pole, double throw switches have their common elements ... | 02/06/2007 |
| 7170466 | Wiper-type phase shifter with cantilever shoe and dual-polarization antenna with commonly driven phase shifters A wiper-type phase shifter with a cantilever shoe that ensures that the electrical contact on the wiper arm remains in electrical communication with the transmission trace located on the antenna backplane without relying to an element, such as a spring-loaded set sc... | 01/30/2007 |
| 7164329 | Tunable phase shifer with a control signal generator responsive to DC offset in a mixed signal The present invention provides a phase shifting filter and a phase compensating direct downconversion receiver. A DC offset detector detects a DC offset in a received baseband signal and provides a feedback signal. A tunable filter phase shifts a local oscillator si... | 01/16/2007 |
| 7154440 | Phase array antenna using a constant-gain phase shifter A constant-gain phase shifter is provided, comprising a first tank circuit with a first node to accept an input signal, a first inductor connected between the first node and a reference voltage, and a first capacitor connected in parallel with the first inductor. Th... | 12/26/2006 |
