Exciter/phasor/transmitter for directional antenna system

Details Exciter/phasor/transmitter for directional antenna system Exciter/phasor/transmitter for directional antenna system

2005-07-19

2005-07-19

Tran, Khai (Department: 2637)

Pulse or digital communications

Transmitters

Angle modulation

Reexamination Certificate

active

06920186

ABSTRACT:
A transmission system delays an analog carrier wave and modulates the analog carrier wave with program audio. The system includes a master oscillator that generates an analog carrier wave. The analog carrier wave is transmitted to a delay stage that delays the analog carrier wave by a certain delay amount. The delay stage may be programmable to adjust the delay amount. The system further receives an analog signal that is representative of programming. A modulator modulates the analog carrier wave with the analog audio and sends the amplitude modulated carrier wave to a power amplifier. After power amplification, the amplitude modulated carrier wave is broadcast by a conventional antenna.

REFERENCES:
patent: 5471176 (1995-11-01), Henson et al.
patent: 5666341 (1997-09-01), Horibe et al.
patent: 5793709 (1998-08-01), Carley
patent: 5796180 (1998-08-01), Glehr

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