Patent ID: 7388453
Filing Date: 2008-06-17
Classification: H01P

Abstract:
1. A high frequency module comprising: at least one antenna terminal connected to an antenna; a plurality of diplexers each of which separates signals in a first frequency band from signals in a second frequency band, which is higher than the first frequency band; a switch circuit for connecting one of the diplexers to the at least one antenna terminal; and a substrate for integrating the at least one antenna terminal, the plurality of diplexers and the switch circuit, wherein: the switch circuit is designed to receive a control signal for controlling switching of a state; each of the diplexers incorporates: first to third ports; a first filter that is provided between the first and second ports, which allows signals in the first frequency band to pass; and a second filter that is provided between the first and third ports, which allows signals in the second frequency band to pass, the first port being connected to the switch circuit; and each of the diplexers further incorporates: a node between a signal path to the first filter and a signal path to the second filter as seen from the first port; a first capacitor provided between the node and the first filter and blocking passage of direct currents resulting from the control signal; and a second capacitor provided between the node and the second filter and blocking passage of direct currents resulting from the control signal.