Communications: radio wave antennas – Antennas – Antenna components
Patent
1979-12-26
1981-08-18
Lieberman, Eli
Communications: radio wave antennas
Antennas
Antenna components
333248, 343781P, H01Q 1504, H01Q 1506
Patent
active
042849926
ABSTRACT:
The present invention relates to a quasi-optical frequency diplexer capable of operating over a wide angle of scan and separating microwave signals possessing proximate center frequencies. The present invention, which in one aspect may be employed with a phased array antenna arrangement functioning so as to separate the transmit and receive frequencies associated therewith, consists of an array of waveguide sections (22) where the input and output ports (30, 32) of the array are tilted with respect to the array's longitudinal axis. The angles of tilt and the dimensions of the waveguide sections may be adjusted so as to achieve frequency diplexing with a minimal amount of interference between the diplexed signals.
REFERENCES:
patent: 2530580 (1950-11-01), Lindenblad
patent: 2553166 (1951-05-01), Bond
patent: 2636125 (1953-04-01), Southworth
patent: 2663848 (1953-12-01), Lewis
patent: 2870444 (1959-01-01), Broussaud
patent: 3698001 (1972-10-01), Koyama et al.
patent: 4079382 (1978-03-01), Henry
Dragone; New Grids for Improved Polarization Diplexing of Microwaves in Reflector Antennas, vol. AP-26, No. 3, May 1978, pp. 459-463.
Saleh et al.; A Quasi-Optical Polarization Independent Diplexer for Use in Millimeter-Wave Antennas, vol. AP-24, No. 6, Nov. 1976, pp. 780-785.
Koyama et al.; The Quasi-Optical Filters Used for the Domestic Satellite Communications Systems, Electronics and Communications in Japan, vol. 56-B, No. 3, pp. 74-81.
Bell Telephone Laboratories Incorporated
Lieberman Eli
Pfeifle Erwin W.
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