VARIABLE RESONATOR, TUNABLE FILTER, AND ELECTRIC CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a variable resonator which can freely change its resonance frequency independently of the change of its bandwidth while can significantly change the bandwidth. SOLUTION: The variable resonator has a loop line (902) to which two or more switches (903) are connected and N [N≥3] variable reactance means (102). The switches (903) each have one end connected to the loop line (902) and the other end connected to a ground conductor, can switch electrical connection/non-connection between the ground conductor and the loop line (902), and differ in position where one end of each switch (903) is connected to the loop line (902). The variable reactance means (102) each can have the same reactance value, and are electrically connected to the loop line (902) in parallel at equal intervals in a circumferential direction of the loop line (902). COPYRIGHT: (C)2008,JPO&INPIT