Antenna system for use in an automatic vehicular identification

Details Antenna system for use in an automatic vehicular identification Antenna system for use in an automatic vehicular identification

1993-09-28

1995-06-27

Hajec, Donald

Communications: radio wave antennas

Antennas

High frequency type loops

343867, 343876, 340572, H01Q 1102, H01Q 700, H01Q 902

Patent

active

054283639

ABSTRACT:
An antenna system for use in an Automatic Vehicle Identification (AVI) system 10 having a plurality of non-resonant antenna loops 14 which operate as a single loop antenna during a transmit cycle and individual antenna during a receive cycle. The antenna system includes individual antenna 14 each having amplifier 29 connected to a single source. A switch circuit selectively switches the system from a transmit to receive mode and from a receive to a transmit mode.

REFERENCES:
patent: 2965188 (1960-12-01), Hanysz
patent: 3588372 (1971-06-01), Jauquet
patent: 3979091 (1976-09-01), Gagnon et al.
patent: 3991485 (1976-11-01), Golenski
patent: 4680717 (1987-07-01), Martin
patent: 4806943 (1989-02-01), Doncel
patent: 4963880 (1990-10-01), Torre et al.
patent: 5084710 (1992-01-01), Whittington
patent: 5126749 (1992-06-01), Kaltner

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