Wireless access control system using a proximity member and ante

Details Wireless access control system using a proximity member and ante Wireless access control system using a proximity member and ante

1997-03-21

1998-09-15

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Spiral or helical type

34082531, H01Q 136

Patent

active

058085874

ABSTRACT:
The present invention provides an antenna equipment for a wireless access control system, which includes a plurality of print substrates which are stacked in a unitary assembly; and a plurality of coil patterns each of which has a starting end and a terminating end, the patterns being respectively formed on the plurality of print substrates; wherein each of the plurality of coil patterns are connected each other at at least one of the starting end and the terminating end thereof.

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patent: 4736207 (1988-04-01), Siikarla et al.
patent: 4745401 (1988-05-01), Montean
patent: 5206657 (1993-04-01), Downey

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