Apparatus and method for measuring the level of RF signals,...

Details Apparatus and method for measuring the level of RF signals,... Apparatus and method for measuring the level of RF signals,...

2011-05-03

2011-05-03

Le, Thanh C (Department: 2618)

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

C455S121000

Reexamination Certificate

active

07937051

ABSTRACT:
On a radio frequency signal path a transmission phase shifter causes a phase shift. From a first end of said phase shifter comes a first sample, and from a second end of said phase shifter comes a second sample. Another phase shifter changes the phase of the second sample by the same magnitude as said transmission phase shifter. A measurement circuit combines the phase-shifted second sample with a phase-inverted version of the first sample to produce an output indicative of a power level of the original signal on the radio frequency signal path.

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