DUAL BAND RESONATOR, AND, DUAL BAND PASS FILTER EMPLOYING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a dual band resonator that can be further downsized in relative to the prior arts.SOLUTION: A dual band resonator 10 comprises a first conductor part 20 and a second conductor part 30. The first conductor part 20 is folded in a first folding part 21 of a central part and extends in a predetermined direction adjacently at a predetermined interval. A conductor portion 26 closer to one end 28 than the first folding part 21 and a conductor portion 27 closer to another end 29 than the first folding part 21 are further folded in a second folding part 22 between the one and other ends 28 and 29 and the first folding part 21 in such a direction that the one end 28 and the other end 29 are separated from each other. The second conductor part 30 extends in a predetermined direction continuously to the first folding part 21 of the first conductor part 20. The first conductor part 20 constitutes a half-wavelength resonator, and odd-mode resonance is generated in the first conductor part 20. The first conductor part 20 and the second conductor part 30 constitute a half-wavelength resonator, and even-mode resonance is generated in the first conductor part 20 and the second conductor part 30.SELECTED DRAWING: Figure 9A