Patent ID: 7528678

Claim:
An antenna switch module comprising: a filter passing fundamental frequencies and having an attenuation pole, the filter having a first impedance; an antenna switch circuit switching antennas which match the fundamental frequencies, the antenna switch circuit having a second impedance; and an adjustment line conductor of a set length connected between the filter and the antenna switch circuit, the set length of the adjustment line conductor adjusting properties at harmonic frequencies of the fundamental frequencies, wherein when the filter and the antenna switch circuit are connected with each other at a connection point on the adjustment line conductor, the set length of the adjustment line conductor prevents the first impedance and the second impedance from becoming complex conjugates of each other at the harmonic frequencies, wherein the first impedance and second impedance are measured from the connection point, wherein a ground layer is divided into a ground layer for the filter and a ground layer for the antenna switch circuit, wherein the antenna switch module includes a laminated body formed of a plurality of dielectric layers, wherein the filter is a notch low pass filter.