Peter Dimitrijevic - Redondo Beach CA Mark Skidmore - Long Beach CA Theodore S. Fishkin - Lawndale CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
H04B 1700
US Classification:
455226
Abstract:
A high speed wide dynamic range variable rate power detector which provides an output signal linearly proportional to the input power level. The invention operates essentially independently of the system computer and provides a gain measurement system effective in the testing of an antenna in a frequency hopping mode. The illustrative embodiment includes a first subcircuit for down converting an RF input signal to a fixed intermediate frequency signal; a second subcircuit for converting the intermediate frequency signal to a DC signal; a third subcircuit for varying the rate of conversion of intermediate frequency signals to DC signals and a fourth subcircuit for providing an output signal which is proportional to the log of the DC signal.
Theodore S. Fishkin - Lawndale CA Mark Skidmore - Long Beach CA Peter Dimitrijevic - Redondo Beach CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
H01Q 300
US Classification:
342360
Abstract:
An improved antenna test and measurement system including a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive the test signal as transmitted by said transmit antenna; an amplitude detector for detecting the amplitude of the received test signal; and an open loop phase detector for measuring the phase of the received test signal relative to a reference signal.
