DIPLEXER

摘要

A diplexer is provided to reduce parasitic capacitance by forming an inductor pattern on a low dielectric constant organic substrate and to reduce a size by forming a capacitor pattern on a high dielectric constant organic substrate. A diplexer includes a low pass filter(300) and a high pass filter(310). The low pass filter is positioned between an antenna terminal(ANT) and a first band duplexer. The high pass filter is positioned between the antenna terminal and a second band duplexer. The low pass filter has a matching inductor(L11) and a first series resonator(302). The matching inductor is connected between the antenna terminal and the first band duplexer to pass a low band signal. The first series resonator is connected between a connection point of the first band duplexer and the matching inductor and a ground. The high pass filter has a matching capacitor(C12) and a second series resonator(312). The matching capacitor is connected between the antenna terminal and the second band duplexer to pass a high band signal. The second series resonator is connected between a connection point of the second band duplexer and the matching capacitor and a ground.