Single null miniature direction finder

Details Single null miniature direction finder Single null miniature direction finder

1989-04-24

1991-03-26

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342419, G01S 502

Patent

active

050033166

ABSTRACT:
A single null miniature direction finder which may be worn on the arm of the user and is fully automatic in operation. Signals from a single loop antenna and a sense antenna are summed; however, the amplitude of the sense signal is adjusted at first and second phase angles and the phase of the sense antenna is automatically switched from the first phase angle to the second phase angle prior to summing to produce either a single null or a no null pattern. These patterns are compared to each other as the user extends his arm horizontally and rotates his body. When the null occurs an indicator gives the relative direction to the transmitter.

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Giacoletto et al., Medium-Frequency Crossed Loop Radio Direction Finder with Instantaneous Unidirectional Visual Presentation (RCA Labs; 9/49).

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