Accession Number : AD0654931

Title :   ON-A-PULSE FREQUENCY MEASUREMENT TECHNIQUE.

Descriptive Note : Technical rept.,

Corporate Author : SYRACUSE UNIV RESEARCH CORP N Y DEFENSE SYSTEMS LAB

Personal Author(s) : Hickman,G. Daniel ; Harris,Paul E. ; Johnson,David W.

Report Date : 28 APR 1967

Pagination or Media Count : 59

Abstract : A technique is described for measuring the carrier frequency of a radar pulse. Two cascaded hybrids with unequal delay lines inserted between the two output ports of the first hybrid and the input ports of the second provide the frequency sensing element. The power ratio between the two output ports of the second hybrid is a sensitive function of frequency. The measurement of the log of this power ratio is converted to a time difference measurement delta t by comparison with an injector signal decaying exponentially. It is shown that this delta t is linearly proportional to frequency over an octave. Included also are the schematics and descriptions of the circuits that comprise the 'log-injection' unit. (Author)

Descriptors :   (*RADAR PULSES, *FREQUENCY ANALYZERS), DISCRIMINATORS, MICROWAVE FREQUENCY, MEASUREMENT, FREQUENCY, LOGARITHMIC AMPLIFIERS, VIDEO AMPLIFIERS, DIGITAL TO ANALOG CONVERTERS, L BAND

Subject Categories : Test Facilities, Equipment and Methods
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE