Radio communicate method and system

Details Radio communicate method and system Radio communicate method and system

2007-11-06

2007-11-06

Maung, Nay (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S191100, C455S193100, C343S751000, C343S824000, C342S423000, C342S444000

Reexamination Certificate

active

10508488

ABSTRACT:
A transmitter1transmits from a transmission antenna7a mixture signal containing a radio-frequency (RF)-band modulated signal, and a portion of power of a local oscillation signal used for frequency conversion. Meanwhile, a receiver8detects the transmitted signal by means of a reception antenna-detection section9. In the reception antenna-detection section9, a plurality of base unit reception circuits11are disposed. Each base unit reception circuit11includes a planar printed antenna12such as a patch antenna, an amplifier circuit13formed on a very small planar circuit by means of an MMIC technique, and a mixer circuit14serving as a square-law detector. Respective outputs of the base unit reception circuits11are power-mixed and fed to the IF signal demodulation section. The IF signal demodulation section10demodulate reception data. This configuration enables realization of a reception antenna which occupies a very small space, has a detection function and a high gain, and has a wide beam characteristic comparable to that of a single-element antenna.

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