Communications: radio wave antennas – Antennas – Wave guide type
Patent
1981-10-28
1983-12-06
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
333 21R, H10Q 1302
Patent
active
044196717
ABSTRACT:
The present invention relates to a small hybrid mode feed for dual frequency band use. In the present feed, a helically wound wire structure (10) is bonded to the inner surface of a hollow conducting waveguide structure (12) by a layer (14) of low-loss dielectric material having a predetermined thickness to permit a first frequency band to propagate. Embedded in the dielectric layer between the helically wound wire structure and the inner wall of the waveguide is a periodic tuned grid structure (16) disposed at a predetermined depth from the helical wire structure to permit a second frequency band to propagate. The periodic tuned grid structure can comprise, for example, a Jerusalem Cross grid arrangement.
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Kerzhentseva; Conversion of Wave Modes in a Waveguide, Radio Eng. & Elec. Physics, vol. 16, No. I, Jan. 1971, pp. 24-30.
Dragone; Characteristics of a Broadband Microwave Corrugated feed; BSTJ, vol. 56, No. 6, Jul.-Aug., 1977; pp. 869-888.
Carpenter; A Dual-Band Corrugated Feed Horn; AP-S, Int. Symposium, Quebec, Canada, vol. I, 1980, pp. 213-216.
Bell Telephone Laboratories Incorporated
Lieberman Eli
Pfeifle Erwin W.
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