Antenna for reducing an effect of a radio wave blocking obstacle

Details Antenna for reducing an effect of a radio wave blocking obstacle Antenna for reducing an effect of a radio wave blocking obstacle

1996-08-08

1999-09-14

Wong, Don

Communications: radio wave antennas

Antennas

Wave guide type

343705, 343786, H01Q 1300

Patent

active

059529814

ABSTRACT:
An array antenna is located on an upper surface of a vehicle. The array antenna is oriented at a right angle to a radio wave blocking obstacle existing in a radio wave transmission path. A diffracted wave is effectively received at the shadowed portion where a direct wave is not transmitted because of the radio wave blocking obstacle. If the antenna dimension of its longitudinal direction is larger than that of the radio wave blocking obstacle, both direct wave and diffracted wave are received and therefore the reception power decrease caused by the radio wave blocking obstacle is further reduced.

REFERENCES:
patent: 3611388 (1971-10-01), Okumura
patent: 3702479 (1972-11-01), Uhrig
patent: 4288794 (1981-09-01), Osborne et al.
patent: 4308541 (1981-12-01), Seidel et al.
patent: 4983984 (1991-01-01), Shibano et al.
patent: 5048641 (1991-09-01), Holcomb et al.
patent: 5184141 (1993-02-01), Connolly et al.

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