Duplexer filter having harmonic rejection to control flyback

Details Duplexer filter having harmonic rejection to control flyback Duplexer filter having harmonic rejection to control flyback

1989-05-22

1991-06-11

Eisenzopf, Reinhard J.

Multiplex communications

Wide area network

Packet switching

333205, 333207, 333202, 333231, 370 30, 370 32, H01P 1202, H01P 1205

Patent

active

050238663

ABSTRACT:
A radio frequency duplexer filter for a duplex transceiver is disclosed. To prevent spurious signals conducted by flyback responses of the transmit bandpass filter 103 from reaching the antenna (105), a band reject circuit consisting of third harmonic quarter-wave transmission line stubs (601 and 603) are advantegeously coupled to an output transmission line (107). Likewise, to prevent spurious signals conducted by flyback responses of the receive bandpass filter (113) from reaching the receiver (109), a band reject circuit consisting of third harmonic quarter-wave transmission line stubs (605 and 607) are advantageously coupled to an input transmission line (111).

REFERENCES:
patent: 2424156 (1947-07-01), Espley
patent: 2760057 (1956-08-01), Johannesen
patent: 3293644 (1966-12-01), Loos et al.
patent: 3656162 (1972-04-01), Mee
patent: 3662294 (1972-05-01), Jacobs et al.
patent: 3728731 (1973-04-01), Choi et al.
patent: 3735289 (1973-05-01), Bruene
patent: 3815137 (1974-06-01), Kaegebein
patent: 4080601 (1978-05-01), Alcorn, Jr.
patent: 4255729 (1981-03-01), Fukasawa et al.
patent: 4283697 (1981-08-01), Masuda et al.
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4509165 (1985-04-01), Tamura
patent: 4546333 (1985-10-01), Fukasawa et al.
Mishima et al., "Antenna and Duplexer for New Mobile Unit", E.C.L. Tech. Journal, NIT, Japan, vol. 31, No. 1, pp. 199-210, 1982.

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