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Class Information
Number: 375/304
Name: Pulse or digital communications > Transmitters > Angle modulation > Frequency shift keying > Antenna tuning with frequency shift
Description: Subject matter where the transmitter is connected to an antenna circuit which is tuned to the instantaneous frequency of the transmitted carrier wave.

Patents under this class:

Patent Number Title Of Patent Date Issued
8605823 Communication using continuous-phase modulated signals Dec. 10, 2013
8599861 Active antenna array and method for relaying radio signals Dec. 3, 2013
8451934 Method and system for increasing throughput of a wireless channel using multipath transmission May. 28, 2013
8416879 System and method providing signal combining to support multimode communication Apr. 9, 2013
8259686 Array antenna system and transmit/receive module thereof Sep. 4, 2012
8254508 Method and apparatus for frequency tracking in a space time transmit diversity receiver Aug. 28, 2012
8170512 Wireless transmitter May. 1, 2012
7904034 Method and system for providing an interference cancellation in a wireless communication system Mar. 8, 2011
7826552 Semiconductor device and wireless communication system Nov. 2, 2010
7796710 Digital signal demodulator and wireless receiver using the same Sep. 14, 2010
7792223 Method and system for demodulating data signals Sep. 7, 2010
7769091 Communication system Aug. 3, 2010
7668258 Systems and methods for transmitter diversity expansion Feb. 23, 2010
7606321 System and method for simplifying analog processing in a transmitter incorporating a randomization circuit Oct. 20, 2009
7583638 Device and method for processing a digital data signal in a CDMA radio transmitter Sep. 1, 2009
7502764 Method for deciding array spacing of array antenna by using genetic algorithm and array antenna having sofa structure with irregular array spacing Mar. 10, 2009
7469021 Method and system for code reuse and capacity enhancement using null steering Dec. 23, 2008
7447277 Ofdm demodulation device Nov. 4, 2008
7421039 Method and system employing antenna arrays Sep. 2, 2008
7379714 Method and apparatus for dynamically adjusting a transmitter's impedance May. 27, 2008
7308240 Numerical control oscillator, digital frequency converter and radio frequency unit Dec. 11, 2007
7218684 Method and system for code reuse and capacity enhancement using null steering May. 15, 2007
7092685 Method for tuning a radio filter and a system for tuning a radio filter Aug. 15, 2006
7079869 Communication system transmitter or receiver module having integrated radio frequency circuitry directly coupled to antenna element Jul. 18, 2006
6590945 Method and apparatus for frequency offset compensation Jul. 8, 2003
6441804 Transmitter and receiver for use in a wireless cursor control system Aug. 27, 2002
6434135 Adaptive RF amplifier prelimiter Aug. 13, 2002
6317009 Frequency shift key modulating oscillator Nov. 13, 2001
6275539 System and method for modulating a frequency signal Aug. 14, 2001
6246727 Method and system for tuning resonance modules Jun. 12, 2001
6225873 Frequency shift key modulating oscillator May. 1, 2001
6041083 Method and system for tuning resonance modules Mar. 21, 2000
5910968 Continuous phase modulation digital communication system Jun. 8, 1999
5644598 Switching arrangement for coupling a transmitting unit to a transmission line Jul. 1, 1997
5491715 Automatic antenna tuning method and circuit Feb. 13, 1996
5448769 Method for tuning the medium frequency of an RF bandpass filter by determining and interpolating in relation to medium frequencies at and offsets from a nominal carrier frequency Sep. 5, 1995
5300904 Circuit arrangement for the tank circuit of a high-frequency transmitter output stage operated with frequency shift keying Apr. 5, 1994
4689803 Antenna tuning system and method Aug. 25, 1987
4555792 Transmitter for transmitting an FSK-modulated signal Nov. 26, 1985
4545059 Antenna coupler system Oct. 1, 1985
4059801 Apparatus for degrading Q in a high-Q RF pulse transmitting system and the like Nov. 22, 1977
3939422 Dynamic antenna tuner Feb. 17, 1976

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