Patent ID: 7206371
Filing Date: 2007-04-17
Classification: H03L,H04L

Abstract:
1. A transmitting and receiving apparatus comprising: modulating means for modulating an input digital data; first frequency converting means for converting a signal output from said modulating means into a signal of a predetermined frequency; amplifying/branching means for amplifying and branching a signal output from said first frequency converting means; second frequency converting means for converting a signal output from said amplifying/branching means, into a signal of a predetermined frequency; and demodulating means for demodulating a digital data from a signal output from said second frequency converting means, wherein each of said first and second frequency converting means comprises a PLL frequency synthesizer, said demodulating means has a carrier recovery section, and a coil used in an oscillation section of a voltage controlled oscillator included in each of said PLL frequency synthesizers is a microstrip line constructed and arranged to supress a change of characteristics due to mechanical vibrations, one end of said microstrip line being grounded.