Diversity telemetry receiver having plural spaced antennas

Details Diversity telemetry receiver having plural spaced antennas Diversity telemetry receiver having plural spaced antennas

1983-09-30

1985-09-03

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455141, 34087041, H04B 708, H04B 116

Patent

active

045397104

ABSTRACT:
A diversity telemetry receiver having plural spaced antennas includes a plurality of RF FM receiving channels each associated with an antenna, and each comprising one or more RF amplification stages, a mixer stage, and one or more IF stages along with an analog circuit providing a plurality of control signals that represent the relative signal level of the associated channel, an FM detector, and a signal level responsive switch operative to selectively apply the IF signal from the channel having the strongest signal level to the FM detector. The output of the FM detector which forms the system output is free of switching transients due to the operation of the level responsive switch prior to FM detection. A data recorder may be connected to receive the FM detector output, and a display may be connected to the level responsive switch to provide a visual indication of the channel having the strongest signal. The diversity telemetry receiver having plural spaced antennas is advantageously employed in biomedical applications requiring interference-free reception of physiological telemetry from both human and nonhuman subjects in motion.

REFERENCES:
patent: 2494309 (1950-01-01), Peterson et al.
patent: 3383599 (1968-05-01), Miyagi
patent: 3902119 (1975-08-01), Skingley
patent: 3916316 (1975-10-01), Hearn et al.
patent: 4403343 (1983-09-01), Hamada

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