Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2001-05-18
2002-05-14
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S776000, C333S135000
Reexamination Certificate
active
06388635
ABSTRACT:
FIELD OF INVENTION
The present invention relates to a feeder horn, and more particularly to a feeder horn intended for two-way satellite communication and comprising a central transmitter/receiver horn and at least three separate measuring horns placed symmetrically in relation to the feeder horn.
BACKGROUND ART
A feeder horn of the aforesaid kind is known from Swedish Patent Specification 503456. All of the horns included in the feeder horn are produced mechanically in one and the same metal element, which includes a through-penetrating central opening for the transmitter/receiver horn, a bottom-delimited opening for each of the measuring horns, and a moat-like recess around each opening in the metal element for insulating each horn electromagnetically in relation to remaining horns.
Although feeder horns of this kind have been found to function extremely well in practice, attention is now being paid to the possibility of minimising the dimensions of waveguides in the feeder horn, so as to reduce the shadow on the aperture area of the reflector in the feeder horn.
SUMMARY OF THE INVENTION
In respect of a feeder horn of the aforementioned kind and constructed in accordance with the invention, the delimited opening for each of the measuring horns in the metal element is filled with a dielectric material. Moreover, an adaptation lens that has a centre hole adapted to the centre opening in the transmitter/receiver horn is arranged in front of the metal element.
These and other characteristic features of an inventive feeder horn will be more apparent from the accompanying claims.
REFERENCES:
patent: 3045238 (1962-07-01), Cheston
patent: 3482251 (1969-12-01), Brown, Jr.
patent: 3633208 (1972-01-01), Ajioka
patent: 4090203 (1978-05-01), Duncan
patent: 5874923 (1999-02-01), Nilsson et al.
patent: 6271799 (2001-08-01), Rief et al.
patent: 503 456 (1996-01-01), None
patent: 9604693 (1996-02-01), None
C2Sat Communications AB
Ho Tan
Jacobson & Holman PLLC
LandOfFree
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