Loop antenna

Details Loop antenna Loop antenna

1998-04-06

2000-02-22

Wong, Don

Communications: radio wave antennas

Antennas

High frequency type loops

343742, 343866, H01Q 1112

Patent

active

060285591

ABSTRACT:
A first loop antenna apparatus is disclosed which includes an open loop antenna portion and an inductor having a predetermined inductance and first and second ends connected to first and second intermediate points of the open loop antenna portion. The inductance of the first loop antenna apparatus is decreased because the inductor is connected in parallel, so that an opening area (antenna gain) is increased at the same resonant condition. A second loop antenna apparatus is also disclosed which includes an open loop antenna portion, a first inductor having a predetermined inductance, one end of the first inductor being connected to first intermediate point of the open loop antenna portion, a second inductor having the predetermined inductance, one end of the second inductor being connected to a second intermediate point of the open loop antenna portion, and a capacitor having a predetermined capacitance, connected the other ends of the first and second inductors. Similarly, the inductance of the second loop antenna apparatus is decreased because the inductors and the capacitor is connected in parallel, so that an opening area (antenna gain) is increased at the same resonant condition.

REFERENCES:
patent: 4117491 (1978-09-01), Hanna et al.
patent: 4725780 (1988-02-01), Yoda et al.
patent: 5422650 (1995-06-01), Hill
patent: 5493312 (1996-02-01), Knebelkamp
patent: 5663738 (1997-09-01), Mueller

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