Transmission line impedance matching apparatus

Details Transmission line impedance matching apparatus Transmission line impedance matching apparatus

1998-04-27

2000-08-01

Pascal, Robert

Wave transmission lines and networks

Transmission line inductive or radiation interference...

333 24R, 333 32, 333177, 333181, 379394, 379398, 379414, 379416, H03H 738, H04B 328, H04M 704

Patent

active

060972629

ABSTRACT:
A transmission line impedance matching apparatus is disclosed that limits longitudinal signals and matches the longitudinal characteristic impedance between two conductors and comprises a common mode choke and an impedance matching device. The common mode choke, comprising two windings wound in the same direction, acts as a high impedance to longitudinal high frequency signals. As a result of this, standing waves are caused by the metallic signals reflecting off the choke. The impedance matching device, comprising two windings wound in the same direction, provides a good match to the longitudinal characteristic impedance and thus reduces standing longitudinal waves and reflections. The apparatus may include a terminal corrector or a mid-line corrector, or a combination thereof. This invention may allow greater bandwidth to be dedicated to services and allow transmission over longer subscriber loops before the minimum S/N ratio is achieved.

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patent: 5705974 (1998-01-01), Patel et al.
patent: 5852613 (1998-12-01), Nagatani et al.

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