Patent ID: 7966140
Filing Date: 2011-06-21
Classification: G01R

Abstract:
1. An apparatus for measuring radio frequency power parameters in a radio frequency transmission system having a radio frequency source and a radio frequency load, comprising: a. connectors for electrically interposing said apparatus between said source and said load; b. a semi-directional coupler for electrically receiving a first signal and a second signal from said transmission system through said connectors; c. at least one electrical filter applied to at least one of said first and second signals for compensating for the frequency dependant coupling nature of said electrical coupler; d. an A-D converter for sampling said filtered first and second signals; e. a signal processing module for making complex calculations on said sampled filtered first and second signals; and, f. means running on said processing module for calculating a power of a radio signal propagated through said transmission system from said source, said power calculating means including means for calculating an ambiguous frequency estimate for said first and second signal, means for converting said ambiguous frequency estimate into an unambiguous value, means for calculating complex amplitudes of said first and second signal, means for mathematically compensating for limitations of said semi-directional coupler, and using interim calculation results from said ambiguous frequency estimate calculating means, said converting means, said calculating complex amplitudes means, and said compensating means for calculating power parameters in said system and outputting said power parameters for further human use.