Miniaturized antenna duplexer using SAW filter

Details Miniaturized antenna duplexer using SAW filter Miniaturized antenna duplexer using SAW filter

1982-12-22

1985-04-02

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 30, 455 83, 455286, 333194, H03H 900, H04B 140

Patent

active

045091650

ABSTRACT:
An antenna duplexer is made compact by a use of a SAW filter, and yet it eliminates the possibility that the SAW filter might be burned, and it avoids additional circuits, e.g., an impedance compensation circuit. The antenna duplexer comprises a local oscillation filter. A reception filter is coupled to the local oscillation filter. The coupled side is partly constituted by a SAW filter. A transmission filter is coupled to the reception filter and an antenna is coupled between the reception filter and the transmission filter.

REFERENCES:
patent: 4126838 (1978-11-01), McCusker et al.
patent: 4267597 (1981-05-01), Volpi et al.
IEEE, 1981, "Miniaturized Microwave Filter Construction with Dielectric-Loaded Resonator and Space Coupling", by: Atsushi Fukasawa, Takuro Sato & Kenchuro Hosoda.

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