Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2005-03-01
2005-03-01
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S7810CA
Reexamination Certificate
active
06861998
ABSTRACT:
The present invention relates to an electromagnetic wave transmission/reception source for a multireflector antenna of the Cassegrain type comprising longitudinal-radiation means operating in a first frequency band and an array of n radiating elements of the travelling-wave type operating in a second frequency band with the n radiating elements arranged symmetrically around the longitudinal-radiation means, the array and the longitudinal-radiation means having an approximately common phase centre, the array of n radiating elements being excited by a waveguide of polygonal cross section. The invention applies especially in satellite communication systems operating in the C-, Ku- or Ka-bands.
REFERENCES:
patent: 5041840 (1991-08-01), Cipolla et al.
patent: 6320553 (2001-11-01), Ergene
patent: 6720932 (2004-04-01), Flynn et al.
H.E. Bartlett: “A Broadband Five-Horn Cassegrain Feed” International Conference on Antennas and Propagation. Antennas. Nov. 28-30, 1978, I.E.E. Conference Publication, London, vol. Part 1 No. 169, pp. 350-354.
Louzir Ali
Minard Philippe
Pintos Jean-François
Thudor Franck
A Minh Dieu
Akiyama Kuniyuki
Shedd Robert D.
Thomson Licensing S.A.
Tripoli Joseph S.
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