Offset transmission line coupler for radio frequency signal ampl

Details Offset transmission line coupler for radio frequency signal ampl Offset transmission line coupler for radio frequency signal ampl

1993-11-09

1996-01-23

Pham, Chi H.

Telecommunications

Transmitter

With feedback of modulated output signal

455129, 333116, H01P 510, H04B 104

Patent

active

054871840

ABSTRACT:
An offset transmission line coupler (115) for a transmitter output signal (123) generated by an RF signal amplifier (103) includes a through-path transmission line (201) and a coupled-path transmission line (202) electromagnetically coupled thereto by multiple serpentine-like portions (such as portions 641,642, 643 and 644 in FIG. 6), which are disposed on opposite sides of the through-path transmission line (201) for enhancing coupling sensitivity and eliminating degradation in the amount of coupling due to variations in the transmission line plating registration. Offset portions (641,643) on one side of the through-path transmission line (201) provide substantially the same amount of coupling as the offset portions (642,643) on the other side of the through-path transmission line (201). The offset portions (641, 642, 643, 644) are offset substantially the same distance from the through-path transmission line (201), and the total length of the offset portions (641, 644) on one side are equal to the total length of the offset portions (642, 643) on the other side of the through-path transmission line (201).

REFERENCES:
patent: 3768042 (1973-10-01), Friend et al.
patent: 4375053 (1983-02-01), Viola et al.
patent: 4523155 (1985-06-01), Walczak
patent: 5063365 (1991-11-01), Cappucci
patent: 5193223 (1993-03-01), Walczak
patent: 5212815 (1993-05-01), Schumacher

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