Transceiver duplex filter utilizing saw filter

Details Transceiver duplex filter utilizing saw filter Transceiver duplex filter utilizing saw filter

1994-11-28

1996-05-07

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333193, 333133, 333134, H03H 746

Patent

active

055150152

ABSTRACT:
A miniaturized portable telephone is provided in which a receiving radio-frequency filter is formed by a SAW filter, while a transmitting radio-frequency filter is formed by a dielectric filter and they are mounted on a substrate. The transmitting and receiving sides are connected to an antenna by transmission lines, the length of which is set to have a high impedance in the mutual transmitting and receiving frequency.

REFERENCES:
patent: 4464639 (1984-08-01), Staples
patent: 4733207 (1988-03-01), Peach
patent: 4734664 (1988-03-01), Hikita et al.
patent: 4910481 (1990-03-01), Sasaki et al.
patent: 4954796 (1990-09-01), Green et al.
patent: 5015973 (1991-05-01), Kawakami et al.
patent: 5170500 (1992-12-01), Broderick

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