| Patents for H03H 7 - Multiple-port networks comprising only passive electrical elements as network components (15,104) |
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| 07/09/1991 | US5030932 Electromagnetic delay line |
| 07/03/1991 | EP0435752A1 A wide band diplexer, especially for decameter waves |
| 07/03/1991 | CN2080265U Cam control lockless straight key switch changeable attenuator |
| 07/02/1991 | US5029043 LC circuit incorporated ceramic substrate |
| 07/02/1991 | US5028894 Bandpass filter circuit arrangement |
| 07/02/1991 | US5028892 Analog phase shifter |
| 07/02/1991 | CA1285623C Apparatus for matching unbalanced r.f. baseband signals to balancedsignals on a twisted two-wire line |
| 06/26/1991 | EP0434144A1 Balun |
| 06/26/1991 | CN2079832U Harmonic resistor for electric net |
| 06/20/1991 | DE4039874A1 Line filter for damping symmetrical interference - reduces interference on mains supply lines by using specified series inductors and shunt capacitors across current, neutral and earth lines |
| 06/19/1991 | EP0433176A2 A multilayer hybrid circuit |
| 06/19/1991 | EP0432775A2 Switched-loop 180 degrees phase bit device with aperture shutter capabilities |
| 06/12/1991 | CN1012874B Unbalanced complete cut-off network |
| 06/11/1991 | US5023576 Broadband 180 degree hybrid |
| 05/29/1991 | CN1051827A Balancing loop |
| 05/28/1991 | US5019794 Bandpass filter having an adjustable bandwidth |
| 05/22/1991 | EP0428229A1 tunable high-frequency antenna |
| 05/22/1991 | EP0427928A2 Feed forward differential equalizer for narrowing the signal pulses of magnetic heads |
| 05/15/1991 | EP0426988A1 Balun loop |
| 05/14/1991 | US5015975 Noise filter |
| 05/14/1991 | US5015973 Duplexer with an isolating circuit on a dielectric plate |
| 05/14/1991 | US5015972 Broadband RF transformer |
| 05/10/1991 | CA2026846A1 Balancing loop |
| 05/07/1991 | US5014023 Non-dispersive variable phase shifter and variable length transmission line |
| 05/07/1991 | US5014022 Switched-loop/180 degree phase bit with aperture shutter capabilities |
| 05/07/1991 | US5014018 Nonlinear transmission line for generation of picosecond electrical transients |
| 04/24/1991 | EP0424255A1 Filter unit and corresponding filter |
| 04/24/1991 | CN1050957A Zero passage signal homomorphic treating method and shortwave anti-fading receiving homomorphic treating method |
| 04/23/1991 | US5010305 Microwave integrated circuit |
| 04/16/1991 | US5008894 Drive system for RF-excited gas lasers |
| 04/10/1991 | EP0420966A1 Vector quantizer codebook processing circuit |
| 04/09/1991 | US5006822 Hybrid RF coupling device with integrated capacitors and resistors |
| 04/02/1991 | US5004991 Low pass filter system for an electrical circuit |
| 03/27/1991 | EP0419078A1 Transmission lines |
| 03/26/1991 | CA1282125C Pulse forming networks |
| 03/21/1991 | WO1991003845A1 Filter |
| 03/21/1991 | WO1991003820A1 Transmission lines |
| 03/20/1991 | EP0417668A2 Signal termination circuit |
| 03/14/1991 | DE3929362A1 Filter Filter |
| 03/13/1991 | EP0416476A2 Circuit for connecting plural mutual decoupled frequency hopping transmitters to an antenna |
| 03/13/1991 | EP0339067A4 Constant impedance high frequency coaxial connector |
| 03/13/1991 | CN2073198U Intermediate-frequency spiral electric filter of small-size colour tv |
| 03/12/1991 | US4999642 Transmission line coupling device with closed impedance matching loop |
| 03/12/1991 | US4999595 LC filter structure |
| 03/12/1991 | US4999594 AC line filter with tapped balun winding |
| 03/08/1991 | CA2023568A1 Circuit arrangement for connecting two or more frequency-hopping transmitters to an antenna in a manner providing isolation between the transmitters |
| 03/05/1991 | US4998079 Bi-directional signal coupler for a balanced data transmission line |
| 03/05/1991 | US4998078 Dividing cascade network for a support station in a radio telephone network |
| 02/27/1991 | CN2072295U High-performance small power filter |
| 02/26/1991 | US4995808 Carbon desorption heater |
| 02/19/1991 | US4994774 Integrated low-pass filter arrangement |
| 02/13/1991 | EP0412724A2 Signal converter for converting analog signal into pulses |
| 02/13/1991 | EP0412568A2 Matching network and method for using same |
| 02/12/1991 | US4992761 Passive 180 degree broadband MMIC hybrid |
| 02/06/1991 | EP0411138A1 Inverter |
| 02/05/1991 | US4990868 Modified progressive impedance ladder network |
| 01/30/1991 | EP0410763A2 High frequency impedance transformer |
| 01/30/1991 | EP0410705A2 Vehicle radio receiver systems |
| 01/30/1991 | CN1011456B Apparatus and method for providing improved resistive ratio stability of a resistive divider network |
| 01/30/1991 | CN1011455B Bandwidth limiting ciruit with variable bandwidth |
| 01/29/1991 | US4989264 Bandwidth limiting circuit with variable bandwidth |
| 01/23/1991 | EP0408841A2 Circuit device for automatically tuning a matching network |
| 01/22/1991 | US4987391 Antenna cable ground isolator |
| 01/16/1991 | EP0408323A2 Discrete increment signal processing system and method using parallel branched N-state networks |
| 01/08/1991 | US4984146 Suppression of radiated EMI for power supplies |
| 01/08/1991 | US4983934 Noise filter |
| 01/02/1991 | EP0405069A2 Temperature compensated damping network |
| 12/27/1990 | EP0404225A2 Radio receiver |
| 12/25/1990 | US4980661 Diplexer for coupling RF signals, as well as a DC sawtooth signal, to an antenna |
| 12/25/1990 | US4980658 Gigahertz bandpass passive integrator |
| 12/25/1990 | US4980654 Transmission line transformer |
| 12/19/1990 | EP0403176A2 Continually variable analog phase shifter |
| 12/19/1990 | CA2019073A1 Radio receiver |
| 12/18/1990 | US4978931 Tunable phase shifter having wide instantaneous bandwidth |
| 12/12/1990 | EP0401906A1 Phase shifter |
| 12/06/1990 | DE3918257A1 Matching and filter circuit for transmitter and receiver aerial - has two inductively coupled, parallel resonance circuits, each with adjustable capacity and inductance |
| 11/29/1990 | WO1990014713A1 Generating very high frequency powers with large bandwidths |
| 11/29/1990 | DE3917315A1 Aerial filter for coupling USW reception part - has sheet metal screen coupled to reference potential, orthogonal to circuit board |
| 11/28/1990 | EP0399975A2 RF connector for the connection of a radiotelephone to an external antenna |
| 11/28/1990 | EP0399202A2 High frequency branching directional coupler |
| 11/28/1990 | CN1010637B Improvements to pin diode attenuators |
| 11/27/1990 | US4973926 Low frequency carrierband multi-port signal coupler |
| 11/27/1990 | US4973915 Feed forward differential equalizer for narrowing the signal pulses of magnetic heads |
| 11/27/1990 | CA1276997C In-line filtering device for a telecommunications line |
| 11/27/1990 | CA1276992C Electronically controlled matching circuit |
| 11/22/1990 | EP0397900A1 Electrical connector with interference elimination and its production process |
| 11/07/1990 | EP0396430A2 Radio frequency network |
| 11/07/1990 | EP0396123A2 Parallel connection multi-stage band-pass filter |
| 11/06/1990 | US4968948 Pulse width modulation amplifier circuit |
| 11/06/1990 | US4968901 Integrated circuit high frequency input attenuator circuit |
| 11/05/1990 | CA2015945A1 Radio frequency network |
| 10/31/1990 | EP0394942A2 A signal insertion processor and an encoder using the processor |
| 10/31/1990 | EP0394292A1 Computer network interconnecting apparatus |
| 10/30/1990 | US4967161 Signal processing method and apparatus |
| 10/25/1990 | DE4011294A1 Laminated noise and interference LC filter - has specified ratio of power inductances in regions forming capacitances |
| 10/24/1990 | EP0393644A2 LC noise filter |
| 10/17/1990 | CN2064133U Middle and large power non-balance and balance conversion matching device |
| 10/07/1990 | WO1990012460A1 Vector quantizer codebook processing circuit |
| 10/07/1990 | CA2030528A1 Vector quantizer codebook processing circuit |
| 10/02/1990 | US4961062 Continually variable analog phase shifter |