| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To allow application to radio equipment comprising a reception system circuit only, and to detect deterioration of a VSWR of an antenna while suppressing subsidiary emission compared to the method of inputting signals directly to the antenna and observing a reflection power amount. <P>SOLUTION: A signal processing part (DSP 30) switches a TDD switch 20c to an antenna abnormality detection system circuit part 20b at the timing of transmission, when signals of the same frequency as the operation frequency of an antenna 10 are outputted from an oscillator 25 of the antenna abnormality detection system circuit part 20b, observes reflection power of an abnormality detection amplifier 23 detected in a detector 26, and detects antenna abnormality. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
