FILTER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS

摘要

PURPOSE: A filter, a communications module, and a communications device thereof are provided to reduce pass loss by miniaturizing a filter. CONSTITUTION: An input line(2a) is connected to an input terminal(1). The input line filter is connected to a contact point(3). A first resonant line(2b) and a second resonant line(2c) are connected between the contact point and a grounding part. The first and second resonant lines are connected to a signal line connecting the input terminal and an output terminal(4) or same contact in parallel. An output line(2d) is connected between the contact point and the output terminal. The input line, the first and second resonant lines, and the output line are composed of a distributed constant transmission line.