Shaped beam array antenna for generating a cosecant square beam

Details Shaped beam array antenna for generating a cosecant square beam Shaped beam array antenna for generating a cosecant square beam

1998-05-05

2000-08-22

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

343771, H01Q 138, H01Q 1310

Patent

active

061079642

ABSTRACT:
To simplify designing and fabrication of a shaped beam array antenna for generating a cosecant square beam, slots having the same size are arranged with the same separation on a wall of a wave guide. The slots yield an excitation amplitude distribution wherein the excitation amplitude distribution attenuates exponentially from a feeder side of the wave guide to the terminal side of the wave guide where a terminal dummy is provided. The excitation phase distribution is linear with a slight variation. The first slot nearest to the feeder side is modified to produce an excitation phase difference between the first and the second slot.

REFERENCES:
patent: 3568208 (1971-03-01), Hatcher et al.
patent: 4518967 (1985-05-01), Westerman
H. Seki, et al., "A Wide-Angled High-XPD Node Station Antenna For Local Distribution Radio System", Proceedings of ISAP '85, Kyoto, Japan, pp. 421-424.

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