Communications: radio wave antennas – Antennas – Wave guide type
Patent
1981-10-28
1984-08-28
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343785, 333240, H01Q 1302
Patent
active
044686722
ABSTRACT:
The present invention relates to hybrid mode feeds which are capable of handling very wide bandwidths. In the present feed arrangements, a dominant TE.sub.11 mode is converted to the HE.sub.11 hybrid mode which is then launched. The TE.sub.11 to HE.sub.11 mode conversion is achieved by inserting a circular dielectric rod (12) into a flared end (11) of a smooth-walled cylindrical feedhorn until a small cylindrical section of the dielectric rod engages with the inner wall (15) of the unflared portion of the feedhorn. In one feed arrangement, the other end of the dielectric rod is similarly inserted into a flared end (21) of a corrugated cylindrical feedhorn section (22) until a short longitudinal section of the cylindrical portion of the rod is concentric with the corrugations of an unflared section of the feedhorn to provide a transition for the HE.sub.11 mode into the corrugated waveguide for subsequent launch. In a second feed arrangement, the dielectric rod at the aperture of the smooth-walled flared feedhorn is flared outward to end in a curved configuration which is shaped to minimize reflections back into the dielectric rod and provide a predetermined wavefront at the aperture of the feed.
REFERENCES:
patent: 2801413 (1957-07-01), Beck
patent: 3605101 (1971-09-01), Kolettis et al.
patent: 3618106 (1971-11-01), Bryant
patent: 3858214 (1974-12-01), Jones
patent: 4021814 (1977-05-01), Kerr et al.
patent: 4040061 (1977-08-01), Roberts et al.
patent: 4231042 (1980-10-01), Turrin
patent: 4246884 (1981-01-01), Noerpal
Dragone; Reflection Transmission . . . in a Corrugated Feed, BSTJ, vol. 56, No. 6, Jul.-Aug. 1977, pp. 835-867.
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; IEEE AP-S Symp., vol. I, Quebec, Can., 1980, pp. 213-216.
Bell Telephone Laboratories Incorporated
Lieberman Eli
Pfeifle Erwin W.
LandOfFree
Wide bandwidth hybrid mode feeds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide bandwidth hybrid mode feeds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide bandwidth hybrid mode feeds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-879992