Multi-mode IFF receiver architecture

Details Multi-mode IFF receiver architecture Multi-mode IFF receiver architecture

2005-04-26

2005-04-26

Tran, Khai (Department: 2637)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S340000, C375S349000, C342S045000, C455S143000

Reexamination Certificate

active

06885695

ABSTRACT:
A transponder receiver for detecting different radio frequency (RF) interrogation mode signals having relatively wide and narrow bandwidths about a common RF center or carrier frequency. A front end stage of the receiver has a preselector with a wide band RF filter for passing both of the wide and the narrow bandwidth interrogation mode signals about the RF center frequency, and a mixer for converting signals from the preselector to frequencies within an intermediate frequency (IF) band. A first IF channel has a narrow band IF filter with a pass band sufficiently wide to pass first IF signals corresponding to the narrow bandwidth interrogation mode signals, but to reject signals corresponding to undesired interfering signals at frequencies near the narrow bandwidth interrogation mode signals. A second IF channel has a wide band IF filter with a pass band sufficiently wide to pass second IF signals corresponding to the desired wide bandwidth interrogation mode signals. The receiver may be incorporated in a transponder for operation in narrow IFF Modes 1-4, C and S, and in wide IFF Mode 5, with optimum performance in all modes.

REFERENCES:
patent: 4646097 (1987-02-01), King
patent: 5199109 (1993-03-01), Baker
patent: 5471509 (1995-11-01), Wood et al.
patent: 5796772 (1998-08-01), Smith et al.
patent: 6295461 (2001-09-01), Palmer et al.
patent: 0 905 528 (1999-03-01), None
European Patent Office, Communication dated May 23, 2003, and Search Report on EP Application No. 01 30 7192.
A.A. Ghirardi, Radio & Television Receiver Circuitry and Operation, (Rinehart Books 1951), pp. 238-241.
U.L. Rohde, et al., Communications Receivers—Principles and Design (McGraw-Hill 1988), pp. 49-53.
GEC-Marconi Hazeltine Corporation, Proposal 3-6057, pp. 2-17 to 2-27 (May 17, 1999).

Affiliated with

Also associated with

Rating

Multi-mode IFF receiver architecture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-mode IFF receiver architecture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-mode IFF receiver architecture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3374816