High-frequency switching module and frequency-characteristic adjusting method for high-frequency circuit

A high-frequency switching module in which a high-frequency switch including a high-frequency switching device arranged to selectively switch between transmission paths for high-frequency signals and a π-type high-frequency filter including inductors and a capacitor arranged to remove unwanted waves generated in the transmission paths are integrated with each other, the high-frequency switching module comprising:

• an inductor connected directly and in series between the π-type high-frequency filter and the high-frequency switching device;
• and
• a Chebyshev-type low-pass filter including an inductance component and a capacitor component produced when the high-frequency switching device is turned ON and a shunt capacitor provided in the π-type high-frequency filter;
• wherein
• when a frequency of a ripple, which is a zero point of a pass band, generated by the Chebyshev-type low-pass filter is indicated by fk, the frequency fk is in a frequency band other than n-order higher-harmonic attenuation bands, n being an integral multiple of a fundamental frequency and an integer equal to two or greater.