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| Number | Title | Issue Date |
| 7301419 | Filtering type frequency switching circuit Two lines Ai1 (i=1 or 2) are connected to an input terminal In. The line Ai1 is grounded via a capacitor Ci1. The line Ai1 and a line Bi1 form a coupled line. One end of the line Bi1 is connected to a pos... | 11/27/2007 |
| 7068118 | Pulse modulator for nonradiative dielectric waveguide, and millimeter wave transmitter/receiver using the same A pulse modulator includes a circulator which comprises: two ferrite plates; a plurality of mode suppressors for transmitting therethrough an LSM mode electromagnetic wave while shutting off an LSE mode electromagnetic wave; and an impedance matching member mounted ... | 06/27/2006 |
| 7053074 | Prevention of ovarian cancer by administration of a Vitamin D compound The present invention relates to methods for preventing the development of epithelial ovarian cancer by administering a Vitamin D compound in an amount capable of increasing apoptosis in non-neoplastic ovarian epithelial cells of the female subject. ... | 05/30/2006 |
| 7023292 | Polar modulation using amplitude modulated quadrature signals Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller g... | 04/04/2006 |
| 6977250 | Prevention of ovarian cancer by administration of progestin products The present invention relates to methods for preventing the development of epithelial ovarian cancer by administering progestin products, either alone or in combination with other agents such as estrogen products. ... | 12/20/2005 |
| 6917336 | Miniature ultra-wideband active receiving antenna According to some aspects of this invention, a compact, broadband active receiving antenna uses one or more high transconductance transistors such as Field Effect Transistor(s) paired with another Transistor and arranged in a Cascode amplifier configuration. Some em... | 07/12/2005 |
| 6163231 | Millimeter wave modulator and transmitter In a millimeter wave modulation of the direct modulation technology, the switching speed is increased and the modulation bandwidth is broadened. A millimeter wave modulator includes a millimeter wave waveguide. a switching element (PIN diode) disposed in ... | 12/19/2000 |
| 6034574 | Modulation apparatus A modulation apparatus connected to a termination edge of a waveguide path has a matching circuit, a detection diode for detecting a high-frequency signal inputted from the waveguide path, a resistor consumes a detection output of the detection diode, a t... | 03/07/2000 |
| 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, respectively, and at least a set of capacitive stubs dispos... | 09/07/1999 |
| 5561403 | Oscillator and modulator arrangements on a circuit board A printed circuit board includes an oscillator and a modulator. The oscillator includes a first printed inductor and a capacitive diode which are printed on one side of the printed circuit board. The modulator includes a second printed inductor coupled to... | 10/01/1996 |
| 5416449 | Modulator with harmonic mixers An improved modulator circuit for mixing a modulation signal with a carrier signal includes first and second harmonic mixers which are operative to produce modulated output signals at an output frequency corresponding to both the sum and the difference of... | 05/16/1995 |
| 5214397 | Modulator using low-pass filter as delay element A push-pull modulator stage 70 has two possible transmission paths, an electrically short path (7) and a phase delay path (6) with a phase delay element providing a phase shift of approximately 180°. The phase delay element has the form of a low pass fil... | 05/25/1993 |
| 5159295 | Microwave vector modulator and device for matching a microwave load A microwave vector modulator (4) of the reflective type is used to match a microwave load. The adjustable reflection of the vector modulator is obtained by semiconducting surfaces (18, 19, 20, 21), illuminated by light-emitting means (24, 25, 26, 27).... | 10/27/1992 |
| 5153536 | Suppressed carrier modulator formed from two partial modulators each including a phase delay path A modulator suitable for 16 quadrature amplitude modulation (QAM) is designed as a double modulator (1), wherein a 16 QAM modulator (39) consists of two double modulators (1). One double modulator (1) has two partial modulators (1',1") forming a bridge. E... | 10/06/1992 |
| 5006811 | Dual quadrature frequency converter A method and apparatus for modulating or demodulating a radio frequency (RF) signal which incorporates a pair of quadrature couplers. In demodulating an RF signal, an LO signal and the RF signal are each phase shifted -90 degrees by the couplers. The RF a... | 04/09/1991 |
| 4954790 | Enhanced coupled, even mode terminated baluns, and mixers and modulators constructed therefrom A balun section formed of a pair of transmission lines connected between separate pairs of corresponding input and output terminals with a pair of capacitors connected in series between the output terminals and another transmission line connected in serie... | 09/04/1990 |
| 4954791 | Non-commensurate line length rf modulator In a reflective shunt-diode radio-frequency modulator the shunting diodes are spaces so that the transmission line sections between diode pairs have non-commensurate lengths. The transmission line length sections between diode pairs are selected so that a... | 09/04/1990 |
| 4894624 | Combined amplitude modulator and frequency converter An amplitude modulator for mixing multifrequency signals characterized in that there are combined a mixer for producing a mixed signal by mixing not less than two alternating current signals with different frequency and a signal generator for the modulato... | 01/16/1990 |
| 4755772 | Switchable microwave oscillator A switchable microwave oscillator is disclosed that includes a quenching circuit for switching, attenuating, modulating, or otherwise controlling the output amplitude of frequency-stabilized, transistor-based, microwave-frequency oscillators. The quenchin... | 07/05/1988 |
| 4727596 | High dynamic range mixer A high performance, double-balanced mixer comprising a novel transformer and a pair of variable conductance semiconductor devices connected thereto which provides an output signal being the product of two input signals. Two transformer windings each inclu... | 02/23/1988 |
| 4725788 | Switching amplifier A switching amplifier, in particular for generating a modulated anode voltage for a high-frequency, high-power AM transmitter, includes a number of switchable voltage sources. The switchable voltage sources in a first portion of the amplifier provide smal... | 02/16/1988 |
| 4675911 | Monolithic microwave integrated circuit broadband mixer A monolithic microwave integrated circuit broadband mixer in which the distributed amplifier concept is used to develop a broadband mixer circuit.... | 06/23/1987 |
| 4538122 | Diode oscillator with independently variable frequency and power The oscillator includes a two-terminal device (1) as an active element and an impedance-matching network (4) for matching the two-terminal device to a load (A). The impedance-matching network is formed by a coupler (4) having four terminals (2, 3, 7, 8) t... | 08/27/1985 |
| 4160960 | Power-dividing and modulating arrangement A power divider and modulator is disclosed comprising a HF signal source which supplies a carrier signal to a pair of 1/4λ transformers each terminated with a variable impedance, whose impedance value is controlled by a modulating signal from a signal so... | 07/10/1979 |
| 4140982 | Transistor microstrip oscillator and diode attenuator modulator An RF oscillator and modulator especially useful for UHF applications. The oscillator may comprise a series-tuned Colpitts circuit with the tuned circuit including microstrip transmission lines as impedance elements. The modulator includes a pair of seria... | 02/20/1979 |
| 4118598 | Amplitude modulated impatt diode oscillator and a low cost communication system using same A low cost microwave communication system is described in which a transmitter including an IMPATT diode operating CW (Continuous Wave) is amplitude modulated by a video signal such that the radiated RF (radio frequency) output from the transmitter is dire... | 10/03/1978 |
