Directional coupler

Details Directional coupler Directional coupler

2011-03-15

2011-03-15

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S156000, C333S164000

Reexamination Certificate

active

07907032

ABSTRACT:
A directional coupler includes a main line connected at a first end to an input port and at a second end to an output port, a coupled line connected at a first end to a coupled port and at a second end to an isolated port, and a phase shifter connected at a first end to the isolated port and at a second end to the coupled port. The phase shifter phase shifts a second reflected wave component such that the second reflected wave component is opposite in phase to a first reflected wave component, the second reflected wave component traveling from the output port to the coupled port through the isolated port and the phase shifter, the first reflected wave component traveling from the output port to the coupled port through the coupled line.

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Chen, J. et al.; “A High-Directivity Microstrip Directional Coupler With Feedback Compensation”,2002 IEEE MTT-S Intl. Microwave Symposium Digest, vol. 1, pp. 101-104, Seattle, WA (Jun. 2-7, 2002).

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