Accession Number : AD0603773

Title :   AVAILABLE-POWER CALIBRATION OF RECEIVING SYSTEMS FOR RADIO-PROPAGATION MEASUREMENTS,

Corporate Author : ARMY SIGNAL RADIO PROPAGATION AGENCY FORT MONMOUTH N J

Personal Author(s) : Silberstein,Richard

Report Date : JUN 1964

Pagination or Media Count : 40

Abstract : It is shown that the available-power concept lends itself readily to the calibration of recording receivers used for amplitude measurements where the receiver is not in general matched to the rf input cable. When the antenna is matched to the cable, valid calibrations can be had by calibrating with a signal generator matched to the characteristic impedance of its cable, assumed to be the same as that for the antenna cable. This is true even when the antenna cable has some losses, if one adds to the available power measured at the receiver end, the cable losses for the matched case. If the antenna is not matched to the cable it is shown that the available power can be measured by first matching the receiver end of the cable to the cable characteristic impedance and then using the system with this matching network feeding the receiver. Cable loss must be determined for the system in the matched condition and extra losses, which are frequently negligible, added for the antenna mismatch. The circuit arrangement for a practical calibrating and recording system with a signal generator and attenuator pads is discussed. (Author)

Descriptors :   (*RADIO WAVES, PROPAGATION), (*RADIO RECEIVERS, CALIBRATION), RECORDING SYSTEMS, ANTENNAS, SIGNAL GENERATORS, CIRCUITS, RADIOFREQUENCY CABLES, POWER, HIGH FREQUENCY, VERY HIGH FREQUENCY

Distribution Statement : APPROVED FOR PUBLIC RELEASE