Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Patent
1997-01-15
2000-02-22
Urban, Edward F.
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
4552261, 324142, H04B 104
Patent
active
06029051&
ABSTRACT:
A method and device for measuring the return loss of a radiofrequency signal at a feeding circuit coupled to a load, wherein the forward power and the reflected power are sensed by a measuring circuit having first and second branches (11, 12) for transferring a derived forward signal and a derived reflected signal, respectively. The return loss is calculated on the basis of the sensed power levels (P1, P2) of the derived signals in the first and second branches. The sensing range of power levels (P2) to be sensed in one branch (12) is adjusted in response to the sensed power level (P1) in the other branch (11), whereby the dynamic range required for power sensing in the measuring circuit is reduced.
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Folkesson Ulf
Osterberg Magnus
Persson Gunnar
Allgon AB
Urban Edward F.
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