Portable telephone apparatus and control method thereof
作者： Hiroshi Iwai , Yoshio Koyanagi , Kenichi Yamada , Koichi Ogawa
DOI:
关键词: Amplitude ratio 、 Radiation pattern 、 Electrical engineering 、 Transmission (telecommunications) 、 Phase difference 、 Antenna (radio) 、 Control methods 、 Radio signal 、 Computer science
摘要: A transmitting unit of a portable telephone apparatus transmits radio signals by using at least two antennas and simultaneously energizing those with predetermined amplitude ratio phase difference so that the direction main beam radiation pattern has substantially opposite to audio radiating from speaker, mean effective gain is larger than when single antenna energized. The above energization formed only for transmission speech. receiving receives antennas, selectively receives, diversity system, signal having highest level received antennas.
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