Diversity receiver

Details Diversity receiver Diversity receiver

1989-05-16

1990-12-11

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455278, 455297, H04B 708, H04B 110

Patent

active

049776150

ABSTRACT:
A diversity receiver includes first and second antennae for receiving an RF signal, and an antenna switching circuit for selecting one of the first and second antennae. A first detection circuit having a high sensitivity, and a second detection circuit having a low sensitivity are provided, each detecting a noise signal contained within the received RF signal in different sensitivity. A field strength detection circuit is provided for detecting a field strength of the received RF signal, and a selection circuit is provided for selecting either one of the first and second detection circuits according to the output signal of the field strength detection circuit, and for providing a switching signal to the antenna switching circuit. Thus, when the field strength is relatively strong, the first detection circuit with high sensitivity is used for the noise detection, and when the field strength is relatively weak, the second detection circuit with low sensitivity is used for the noise detection.

REFERENCES:
patent: 4499606 (1985-02-01), Rambo
patent: 4525869 (1985-06-01), Hamada et al.

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