FRONT-END CIRCUIT AND WIRELESS COMMUNICATION DEVICE

摘要

This invention provides a front-end circuit and a wireless communication device that make it possible to perform antenna matching over a wide frequency range and minimize degradation of high-frequency characteristics due to harmonics in signals being transmitted. This front-end circuit (1) contains the following: a variable matching circuit (121) connected on the side of a diplexer (11) corresponding to a low-frequency transmission port (Tx1); and a harmonic filter (14) connected between the diplexer (11) and the variable matching circuit (121). The harmonic filter (14) has a passband that overlaps a low-frequency-side communication band and a stopband that overlaps harmonic frequencies of said low-frequency-side communication band.