Method and apparatus for intermodulation noise suppression in RF

Details Method and apparatus for intermodulation noise suppression in RF Method and apparatus for intermodulation noise suppression in RF

1992-04-02

1999-07-27

Urban, Edward F.

Telecommunications

Transmitter

Carrier amplitude control

455114, 455127, H04B 104

Patent

active

059306882

ABSTRACT:
An apparatus and method for suppressing intermodulation noise in a radio frequency power amplifier. Intermodulation noise suppression is achieved by use of an amplitude limiter connected to the signal source and a shaping filter connected between the amplitude limiter and the power amplifier. The shaping filter may be a band-stop notch filter which attenuates intermodulation noise in a selected radio band or a bandpass filter which attenuates all out-of-band intermodulation noise. The intermodulation noise suppression of this invention causes the signal entering the power amplifier to be characterized by (1) a low peak-to-average envelope distribution and (2) low spectral content in the radio frequency bands to be protected.

REFERENCES:
patent: 2051503 (1936-08-01), Usselman
patent: 3084328 (1963-04-01), Groeneveld et al.
patent: 3566285 (1971-02-01), Schroeder
patent: 4194154 (1980-03-01), Kahn
patent: 4211894 (1980-07-01), Watanabe et al.
patent: 4223405 (1980-09-01), Hattori et al.
patent: 4370622 (1983-01-01), Hornbeck et al.
patent: 4539707 (1985-09-01), Jacobs et al.
patent: 4802236 (1989-01-01), Walczak et al.
patent: 5163181 (1992-11-01), Koontz
patent: 5175875 (1992-12-01), Yokoya et al.
Holt, Francis R.; Elimination of Out-of-Band Radiation From Transmitters; Jun. 1960; pp. 1-2.
"Digital Communications By Satellite", Info. & System Sciences Series, James J. Spilker.

Affiliated with

Also associated with

Rating

Method and apparatus for intermodulation noise suppression in RF does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for intermodulation noise suppression in RF, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for intermodulation noise suppression in RF will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-892018