Wrist carried wireless instrument

Details Wrist carried wireless instrument Wrist carried wireless instrument

1989-03-21

1991-12-10

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Body-attached or connected

343744, 455344, H01Q 700

Patent

active

050722310

ABSTRACT:
A wrist carried wireless instrument for minimizing the effects of coming in contact with the wrist of the user is provided. A case contains wireless instrument circuitry. A loop antenna extends without the case. An antenna resonance circuit has two capacitors connected in series. The two capacitors are connected to the loop antenna. A connection between two of the capacitors is formed at substantially the half impedance value across the capacitors and is a ground electric potential. An RF amplifier connects the loop antenna to the wireless instrument circuitry.

REFERENCES:
patent: 3032651 (1962-05-01), Gisiger-Stahli et al.
patent: 4714887 (1987-12-01), Meissner et al.
patent: 4769656 (1988-09-01), Dickey
patent: 4817196 (1989-03-01), MacNak et al.

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