Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1997-01-28
1999-09-21
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342 16, 701213, H04B 7185, G01S 502
Patent
active
059559870
ABSTRACT:
A radio frequency navigation receiver has analog and digital sections. In the analog section, a CRPA antenna module receives global navigation signals and provides two steerable nulls for jammer suppression. An analog RF module has an amplifier and a YIG filter for amplifying and filtering an antenna output signal with jammer suppression. An analog receiver receives and downconverts an RF output signal from the RF system with additional jammer suppression. The analog receiver provides broadband signal filtering with at least 30 dB rejection and narrow band signal filtering with at least 45 dB rejection.
In the digital section, a digital receiver module receives and converts an analog receiver output signal to generate a digital output signal for navigation control. A configuration manager processor responds to detected jammer signals to configure the receiver modules accordingly.
REFERENCES:
patent: 4734701 (1988-03-01), Grobert
patent: 5317322 (1994-05-01), Grobert
patent: 5410750 (1995-04-01), Cantwell et al.
patent: 5489869 (1996-02-01), Mulbrook
patent: 5543804 (1996-08-01), Buchler et al.
Littlepage Robert S.
Murphy John H.
Blum Theodore M.
Northrop Grumman Corporation
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