Cellular phone antenna with reactance cancellation

Details Cellular phone antenna with reactance cancellation Cellular phone antenna with reactance cancellation

1997-07-22

1999-10-19

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With lumped reactance for loading antenna

343702, 343722, H01Q 124

Patent

active

059696885

ABSTRACT:
An improved antenna for use with a hand-held, portable cellular telephone in the 800 to 900 megacycle range for greatly increasing the range and signal efficiency of transmission and receipt, eliminating dead spots, and for reducing or eliminating ground radiation on the user while the device is being used, wherein the antenna includes matched input impedance, a resonance circuit of capacitance and inductance, and a high impedance connected to the end of the antenna radiating element. The high impedance allows the device to be voltage-fed from a single element, altering the radiation pattern both for transmission and receipt.

REFERENCES:
patent: 2648771 (1953-08-01), Cork
patent: 3165751 (1965-01-01), Roll
patent: 3474453 (1969-10-01), Ireland
patent: 4086596 (1978-04-01), Gauss et al.
patent: 4238799 (1980-12-01), Parfitt
patent: 4730195 (1988-03-01), Phillips et al.
patent: 4940989 (1990-07-01), Austin
patent: 5214434 (1993-05-01), Hsu
patent: 5214437 (1993-05-01), Hensler

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