| 摘要 |
A high-frequency component includes a diplexer in which a high-pass filter and a low-pass filter are connected in parallel with an antenna port, a high-frequency circuit cascade-connected to the high-pass filter, and a low-frequency circuit cascade-connected to the low-pass filter. A filter which causes an impedance mismatch to occur is connected to the low-frequency circuit. The low-pass filter includes a line. The low-pass filter is defined by a parallel resonant circuit including the line and a series circuit including the line. A resonant frequency of the parallel resonant circuit is a trap frequency of a high-frequency transmission/reception signal. A resonant frequency of all elements of the low-pass filter is a trap frequency of undesired resonance that occurs at high frequencies.
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