Communications: radio wave antennas – Antennas – Wave guide type
Patent
1991-12-06
1993-11-30
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Wave guide type
343772, 333 21R, H01Q 1300
Patent
active
052669629
ABSTRACT:
A mode converter for converting transverse electric modes into hybrid modes of type EH.sub.mn and including a circular waveguide provided with corrugations extending in a circumferential (azimuth) direction that become deeper toward its end and are continued in a subsequent helically outlined aperture antenna with constant depth. The emitted radiation is circularly polarized and, by the use of suitable reflectors for the emitted radiation, may be cause to be linearly polarized. The emitted radiation no longer has any sidelobes in the far field and its characteristic has a Gaussian profile over the azimuth angle.
REFERENCES:
patent: 3413642 (1968-11-01), Cook
patent: 3653055 (1972-03-01), Wu et al.
patent: 4231042 (1980-10-01), Turrin
patent: 4704611 (1987-11-01), Edwards et al.
patent: 4731616 (1988-03-01), Fulton et al.
patent: 4783665 (1988-11-01), Lier et al.
patent: 5010348 (1991-04-01), Rene et al.
S. N. Vlasov et al, "Transformation of a Whispering Gallery Mode, Propagating in a Circular Waveguide, into a Beam of Waves", Radio Engineering, Electron Physics, vol. 21, 1975, pp. 14-17.
M. Thumm, "Computer-Aided Analysis and Design of Corrugated TE.sub.11 to HE.sub.11 Mode Converters in Highly Overmoded Waveguides", International Journal of Infrared and Millimeter Waves, vol. 6, 1985, pp. 577-597.
Danley et al, "Whispering-Gallery-Mode Gyrotron Operation with a Quasi-Optical Antenna", IEEE Transactions on Plasma Science, vol. 13, No. 6, Dec., 1985, pp. 383-388.
Wada et al, "Calculation of radiation from a quasi-optical reflector antenna for whispering galley mode", International Jounral of Electronics, vol. 65, No. 3, 1988, pp. 725-732.
Vernon et al, "Design of TE11- to HE11 mode converter in a highly over-moded corrugated circular waveguide to be used as a reflector feed for plasma heating", Antennas and Propagation, vol. 1, Jun., 1985, pp. 327-330.
Mobius Arnold
Thumm Manfred
Hajec Donald T.
Ho Tan
Kernforschungszentrum Karlsruhe GmbH
LandOfFree
Method of converting transverse electrical modes and a helically does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of converting transverse electrical modes and a helically, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of converting transverse electrical modes and a helically will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2100039