| Patents for H03C 7 - Modulating electromagnetic waves (533) |
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| 01/23/2001 | US6176432 Modulating and demodulating device |
| 12/26/2000 | CA2208453C Balanced modulator |
| 12/19/2000 | US6163230 Phase-shift keying electronic circuit with distributed structure |
| 11/30/2000 | WO2000051231A3 Ferroelectric modulator |
| 08/31/2000 | WO2000051231A2 Ferroelectric modulator |
| 07/06/2000 | WO2000039918A1 Analogue modulation method and monolithic integrated circuit with mixer stage comprising non-polarised field-effect transistors |
| 05/31/2000 | DE19923819A1 Crystal transceiver system for electromechanically generated free electric waves for independent radio traffic, has crystal resonator coupled to DC supply |
| 05/27/2000 | CA2290763A1 Biasing system for an optical modulator with double output |
| 05/03/2000 | EP0997966A1 Resonator having a variable resonance frequency |
| 04/27/2000 | WO2000024117A1 Method and system for down-converting an electromagnetic signal |
| 03/07/2000 | US6034574 Modulation apparatus |
| 12/15/1999 | EP0963623A1 Phase-shift keying electronic circuit with distributed structure |
| 10/19/1999 | US5969581 Opto-electronically controlled RF waveguide |
| 10/06/1999 | CN2342516Y Remote control AC power source switch device |
| 09/15/1999 | EP0942523A1 Modulating and demodulating device |
| 09/14/1999 | CA2187967C Balanced modulator |
| 09/07/1999 | US5949297 Balanced modulator |
| 12/22/1998 | US5852389 For modulating high speed qam data onto a carrier signal |
| 09/15/1998 | US5808781 Method and apparatus for an improved micromechanical modulator |
| 09/03/1998 | WO1998038730A1 Phase-shift keying electronic circuit with distributed structure |
| 05/12/1998 | US5751469 Method and apparatus for an improved micromechanical modulator |
| 04/21/1998 | US5742901 Balanced modulator |
| 03/11/1998 | CN1175801A Balanced modulator |
| 01/07/1998 | EP0817368A1 Balanced modulator |
| 08/06/1997 | EP0788005A2 Micromechanical optical modulator and method for making the same |
| 06/11/1997 | CN1151632A Balanced modulator |
| 04/23/1997 | EP0769847A1 Balanced modulator |
| 04/03/1997 | DE19536732A1 High frequency heterodyne wave generation and transmission apparatus |
| 07/16/1996 | US5537242 Liquid crystal millimeter wave open transmission lines modulators |
| 01/31/1996 | CN1115930A Balanced phase modulator used in microwave band |
| 12/27/1995 | EP0689322A1 Tunable BPSK modulator |
| 10/10/1995 | US5457436 Balanced phase modulator used in microwave band |
| 09/26/1995 | US5453720 Digital adjustable phase modulator and method |
| 08/15/1995 | US5442327 MMIC tunable biphase modulator |
| 08/08/1995 | US5440278 Ferrite system for modulating, phase shifting, or attenuating radio frequency energy |
| 06/27/1995 | US5428320 Biphase modulator and method without matching elements |
| 04/25/1995 | US5410279 Balanced type phase modulator for use in microwave band |
| 04/19/1995 | EP0649228A1 Apparatus for the transmission of an intensity modulated lightbeam |
| 03/29/1995 | EP0645916A2 Balanced phase modulator used in microwave band |
| 11/10/1994 | DE4416177A1 Balanced phase modulator for use in the microwave band |
| 10/18/1994 | CA2034282C Microwave transmission line and method of modulating the phase of a signal passed through said line |
| 05/03/1994 | CA2050756C Modulator using low-pass filter as delay element |
| 01/18/1994 | US5280647 Double-balanced mixer with triple-layer film transformers |
| 05/25/1993 | US5214397 Modulator using low-pass filter as delay element |
| 03/16/1993 | US5194972 Microwave phase modulation with liquid crystals |
| 02/02/1993 | US5184233 Liquid crystal-based composite material including electrically conducting elongated particles and having enhanced microwave birefringence |
| 10/27/1992 | US5159295 Microwave vector modulator and device for matching a microwave load |
| 04/15/1992 | EP0480145A1 Modulator and mixer stage |
| 02/26/1992 | EP0472404A2 Liquid crystal-based composite material having enhanced microwave birefringence |
| 02/26/1992 | EP0472403A2 Microwave phase modulation with liquid crystals |
| 01/14/1992 | US5081432 Variable bi-phase modulator circuits and variable resistors for microwave signals |
| 01/02/1992 | EP0463665A1 Microwave vector modulator and device for matching a microwave load |
| 12/29/1991 | CA2044450A1 Microwave vector modulator and device for matching a microwave load |
| 08/13/1991 | US5039959 Phase switching circuit |
| 06/19/1991 | EP0432851A2 Variable bi-phase modulator circuits and variable resistors |
| 05/21/1991 | US5017893 Microwave modulator |
| 04/11/1991 | DE4024800A1 Reflective shunt diode RF amplitude modulator - has shunting diodes spaced so transmissive line sections have non-commensurate length |
| 04/11/1991 | DE3933055A1 180 Deg. phase reversal amplitude modulator - has one or two conductor structure and third structure coupled as asymmetric or symmetric gate of second symmetric member |
| 04/09/1991 | US5006823 Microwave phase shifter with 0 or π phase shift |
| 04/09/1991 | US5006811 Dual quadrature frequency converter |
| 11/22/1990 | EP0398159A1 Phase shifter without phase limit |
| 11/06/1990 | US4968956 Microwave phase modulator having a quadrature path with phase offset |
| 10/30/1990 | US4967167 Microwave transmission line and method of modulating the phase of a signal passed through said line |
| 10/23/1990 | US4965866 Very low loss microwave modulator having two phase states O, π |
| 09/11/1990 | US4956614 Device including a radial combiner for electromagnetic waves |
| 09/04/1990 | US4954791 Non-commensurate line length rf modulator |
| 08/01/1990 | EP0380397A1 Balanced modulator for an electromagnetic microwave power signal |
| 07/24/1990 | US4943144 Electromagnetic wave modulator with quantum well structure and its use as a polarizer |
| 05/09/1990 | EP0367657A1 Microwave phase shifter with omicron or pi phase shift |
| 04/11/1990 | EP0362583A1 Microwave modulator for two phase states : O, Pi, with very small losses |
| 12/26/1989 | US4890076 Reflection type SSB modulator |
| 08/23/1989 | EP0329077A2 SSB mixer in microstrip fashion |
| 06/27/1989 | US4843353 Dielectric slab transistions and power couplers |
| 05/30/1989 | US4835543 Dielectric slab antennas |
| 05/30/1989 | US4835500 Dielectric slab optically controlled devices |
| 03/08/1989 | EP0306400A1 Electromagnetic wave quantum well modulator and its use as polarizer |
| 01/17/1989 | CA1249040A1 Rotary coupler |
| 10/26/1988 | EP0288035A2 SSB modulator |
| 10/05/1988 | EP0285524A1 Device comprising a radial combiner for electromagnetic waves |
| 09/15/1988 | DE3712996C1 Phase modulator |
| 08/23/1988 | US4765736 Frequency modulation spectroscopy using dual frequency modulation and detection |
| 07/05/1988 | US4755775 Microwave balun for mixers and modulators |
| 03/08/1988 | US4730224 For transferring signals between processing circuits |
| 12/23/1987 | CN86208084U Ask-psk modulator |
| 12/01/1987 | US4710733 r.f. Phase modulator |
| 08/25/1987 | US4689585 Dielectric slab signal isolators |
| 08/25/1987 | US4689584 Dielectric slab circulators |
| 06/30/1987 | US4677404 Compound dielectric multi-conductor transmission line |
| 04/21/1987 | US4660002 High frequency oscillator using a diode for frequency switching and FM modulation |
| 03/03/1987 | CA1218710A1 Tunable waveguide oscillator |
| 02/24/1987 | CA1218416A1 R.f. circuit arrangement |
| 05/07/1986 | EP0180213A2 Rotary coupler |
| 04/01/1986 | US4580108 Tunable waveguide oscillator |
| 01/21/1986 | US4566132 Multifunction ultra-high frequency circuit and means using such a circuit |
| 12/31/1985 | CA1198781A1 Multifunction ultra-high frequency circuit and means using such a circuit |
| 11/12/1985 | US4553266 R.F. Circuit arrangement |
| 11/05/1985 | CA1196397A1 Radio frequency alternate-path phase switch |
| 10/22/1985 | US4549152 Broadband adjustable phase modulation circuit |
| 09/10/1985 | US4541120 Transmitter-receiver module |
| 06/26/1985 | EP0146086A2 Microwave balun for mixers and modulators |