Antenna diversity receiver

Details Antenna diversity receiver Antenna diversity receiver

2006-03-21

2006-03-21

Tsang, Fan (Department: 2645)

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

C455S135000

Reexamination Certificate

active

07016660

ABSTRACT:
An antenna diversity receiving system is disclosed which includes an antenna device with a plurality of FM antennas and a controllable switching circuit for sequentially switching through one of the plurality of FM antennas via an antenna cable to a receiver upon reception of a switching control signal. The receiver has a multipath detector coupled to a pulse generator for generating a pulse signal to be used as such switching control signal. To secure accurate detection of the switching control signal, the pulse generator is coupled to a pulse shaper to convert the pulse signal of the pulse generator into a pulse signal pair. The pulse signal pair has a first signal pulse followed by a second signal pulse having a signal polarity opposite to the signal polarity of the first signal pulse. The pulse signal pair has a waveform varying symmetrically around a reference level and is supplied through the antenna cable to the antenna device.

REFERENCES:
patent: 4499606 (1985-02-01), Rambo
patent: 4742567 (1988-05-01), Ohe et al.
patent: 5826179 (1998-10-01), Lindenmeier et al.
patent: 6169888 (2001-01-01), Lindenmeier et al.
patent: 0 247 157 (1987-12-01), None
Electronic Engineers' Handbook, by McGraw Hill Book, 1982, Section 16-4.

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