Communications: radio wave antennas – Antennas – Microstrip
Patent
1998-06-05
1999-10-19
Wong, Don
Communications: radio wave antennas
Antennas
Microstrip
343850, 343860, 455283, H01Q 138
Patent
active
059696818
ABSTRACT:
Patch antenna systems for half-duplex communications which are capable of providing a positive gain, quasi-hemispherical antenna pattern over widely separated transmit and receive frequency bands. The antenna systems according to the present invention generally comprise a patch antenna, transmit and/or receive circuit branches for tuning the patch antenna to resonate in separate transmit and receive frequency bands, and disconnection means for electrically isolating the transmit circuit branch from the antenna during periods of reception and for electrically isolating the receive circuit branch from the antenna during periods of transmission. Matching means, which preferably are implemented as part of the transmit and receive circuit branches, may also be provided for increasing the operating bandwidth of the antenna in both the transmit and receive frequency bands. In a preferred embodiment, the patch antenna transmits and receives circularly polarized waveforms, and may be fed by a single feed or in quadrature via orthogonally located feed points.
REFERENCES:
patent: 4008479 (1977-02-01), Smith
patent: 4031540 (1977-06-01), Borys, Jr.
patent: 4080569 (1978-03-01), Cameron
patent: 4218682 (1980-08-01), Yu
patent: 4316194 (1982-02-01), De Santis et al.
patent: 4554554 (1985-11-01), Olesen et al.
patent: 4771291 (1988-09-01), Lo et al.
patent: 4783661 (1988-11-01), Smith
patent: 4809008 (1989-02-01), Gunton
patent: 4864314 (1989-09-01), Bond
patent: 4924236 (1990-05-01), Schuss et al.
patent: 5099249 (1992-03-01), Seavey
patent: 5138331 (1992-08-01), Josypenko
patent: 5255005 (1993-10-01), Terret et al.
patent: 5319378 (1994-06-01), Nalnandian et al.
patent: 5463404 (1995-10-01), Wall
patent: 5561435 (1996-10-01), Nalbandian et al.
patent: 5598168 (1997-01-01), Evans et al.
patent: 5815119 (1998-09-01), Helms et al.
R.M. Fano, Theoretical Limitations on the Broadband Matching of Arbitrary Impedances, Tehcnical Report No.41, Massachusetts Institute of Technology, (Jun. 1947).
Thomas R. Cuthbert, Jr., Broadband Impedance Matching--Fast and Simple, RF Matching Networks, Nov. 1994, pp. 38-50.
William E. Sabin, Broadband HF Antenna Matching with ARRL Radio Designer, QST, Aug. 1995, pp. 33-36.
Maximising Monopole Bandwidth, Electronic World & Wireless World, Dec. 1994.
Robert J. Dehoney, Program Synthesizes Antenna Matching Networks for Maximum Bandwidth, QST, May 1995.
Constantine A. Balanis, Antenna Theory Analysis and design, pp. 723-779, (Jan. 1998).
David F. Bowman, Impedance Matching and Broadbanding, Antenna Engineering Handbook, pp. 43-1-43-31, (1984).
David M. Pozar, Daniel H. Schaubert; Microstrip Antennas--The Analysis and Design of Microstrip Antennas and Arrays, pp. 105-116, 167-175, 178-179 (1995).
Ericsson Inc.
Phan Tho
Wong Don
LandOfFree
Extended bandwidth dual-band patch antenna systems and associate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extended bandwidth dual-band patch antenna systems and associate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended bandwidth dual-band patch antenna systems and associate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2062088