Corrugated horn radiator

Details Corrugated horn radiator Corrugated horn radiator

1980-07-22

1981-10-13

Lieberman, Eli

Communications: radio wave antennas

Antennas

Wave guide type

343786, H01Q 1912, H01Q 1302

Patent

active

042951429

ABSTRACT:
A corrugated horn radiator which includes a transition zone made up of a number of parts between the smooth-wall feed wave guide 1 having a cross-section which is constant and a horn radiator with regular periodic corrugations 10 with the depth of the corrugations being less than one-quarter wave length relative to the lowest frequency to be transmitted. The transition zone starting at the constant diameter feed wave guide comprises a first section which is conical shaped and then joins a second section which is cylindrical in shape and which serves as a phase drift space and then connects to a second conical smoothed walled portion and then connects to an exponential horn having a pair of corrugations with re-entrant ring-shaped ends (6, 7) which are narrower than the regular periodic corrugation structure 10. The pair of corrugations 6 and 7 connect with a corrugated transition section 8 which comprises a plurality of corrugations which have depths that become progressively less as they approach the regular corrugations 10 and wherein the apex angle of the transition portion 8 is greater than the apex angle of the regular corrugation portion 10. The corrugated horn radiator of the invention has good broad band characteristic and favorable broad band cross-polarization characteristics and the corrugated horn radiator can be employed as a horn antenna or as a feed horn for a Cassegrain or focus fed antenna.

REFERENCES:
patent: 3896449 (1975-07-01), Blume
patent: 4106026 (1978-08-01), Bui-Hai
IEEE Transactions on Antennas and Propagation, vol. AP-26, No. 5, Sep. 1978, pp. 654-658, entitled "Shielding Effectivenuess of Corrugations in Corrugated Horns."
IEEE Transactions on Antennas and Propagation, vol. AP-26, No. 2, Mar. 1978, entitled "Design of Corrugated Conical Horns", pp. 367-371.
IEEE Transactions on Antennas and Propagation, vol. AP-24, No. 6, Nov. 1976, entitled "Broadbanding of Corrugated Conical Horns by Means of the Ring-Loaded Corrugated Waveguide Structure," pp. 786-792.
Electronics Letters Mar. 20, 1975, pp. 131-133.
Electronic Letters Aug. 7, 1975, vol. 11, No. 16, entitled "Dual-Frequency-Band Feed With Partially-Dielectric-Loaded Grooves".
Proceedings IEE vol. 118, No. 9, Sep. 1971, entitled "Propagation and Radiation Behaviour of Corrugated Feeds," pp. 1167-1176.
Proceedings of IEEE vol. 118, No. 9, Sep. 1971, entitled "Propagation and Radiation Behaviour of Corrugated Feeds-Pt. 2."

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