Moving vehicle transponder

Details Moving vehicle transponder Moving vehicle transponder

1993-07-02

1994-12-27

Hajec, Donald

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343767, 343702, H01Q 928

Patent

active

053769430

ABSTRACT:
A transponder tag operative in the UHF range and including a substrate of dielectric material having formed on one side a conductive surface providing a ground plane and a dipole antenna, a slot line within the ground plane forming a balanced antenna feeder and leading to the center of the dipole antenna, and the substrate having mounted on the side of the substrate opposite to the one side a transmission line feeder positioned for electromagnetic coupling with the slot line, the transmission line feeder being coupled to transceiver circuit and processing circuit mounted on the opposite side for performing a transponding function.

REFERENCES:
patent: 3845490 (1974-10-01), Manwarren et al.
patent: 3925774 (1975-12-01), Amlung
patent: 4068232 (1978-01-01), Meyers et al.
patent: 4104630 (1978-08-01), Chasek

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