Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1995-09-11
1997-07-29
Hajec, Donald T.
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343702, 343722, 343860, H01Q 150
Patent
active
056525990
ABSTRACT:
A dual-band antenna system for use in a portable communications device is disclosed herein. The antenna system includes an antenna element for radiating electromagnetic energy within low-band and high-band wavelength ranges. In a preferred embodiment, a low-band isolator network, coupled to the antenna element, provides signal isolation between high-band and low-band signal paths during high-band operation. Similarly, a high-band isolator network provides signal isolation, during operation over the low-band range of wavelengths, between the high-band and low-band signal paths. During transmit and receive operation, low-band and high-band electromagnetic energy directed through the antenna is passed by the low-band and high-band isolator networks, respectively. Also included are low-band and high-band matching networks which couple the low-band and high-band isolator networks to low-band and high-band transceiver circuitry.
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Kornfeld Richard K.
Peterzell Paul E.
Pitta Thomas A.
Wallace Raymond C.
Weiland Ana L.
Hajec Donald T.
Martin Roger W.
Miller Russell B.
Phan Tho
Qualcomm Incorporated
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