Antenna system monitor

摘要

A system is disclosed for monitoring of individual frequency channels in an RF signal band by configuration of the electronic processor to operate the tunable filter to select desired channel sub bands. Measurement of forward and/or reverse-propagating fields within the selected sub-bands may be performed and corresponding power levels recorded. The records may be used to provide monitoring signals, such as measures of forward and reflected power, as well as VSWR, return loss. Indications or alarms may be activated if any of these quantities, associated with any one or more channels, falls outside a predetermined acceptable operating range.

主权项

1. A method, comprising:
tuning a selected frequency sub-band having a center frequency and a bandwidth from an input signal received from a transmitter, in which tuning the selected frequency sub-band comprises: selecting a first frequency sub-band for a first filter by selecting a first frequency for a first radio frequency (RF) synthesizer to be mixed, with a first mixer, with a signal at the input of the first filter and to be mixed, with a third mixer, with the output of the first filter; and selecting a second frequency sub-band for a second filter by selecting a second frequency, different from the first frequency, for a second RF synthesizer to be mixed, with a second mixer, with a signal at the input of the second filter, such that the second frequency sub-band at least partially overlaps the first frequency sub-band; generating a detector output corresponding to RF power in the selected frequency sub-band of the received input signal; and recording the detector output for the selected frequency sub-band.