In a broadcasting channel receiving system of cellular radio telephone system, a signal received through an antenna 5 is demodulated with a carrier frequency formed by a frequency synthesizer 2 in a demodulator 4, and the output of the latter 4 is applied to a signal receiver 3. In response to a request...http://www.google.de/patents/US6526276?utm_source=gb-gplus-sharePatent US6526276 - Electric field detecting method
