Title: Bandpass wave filter and RF communication device using same
Application Number: 200610077769 Application Date: 2006.04.25
Publication Number: 1855613 Publication Date: 2006.11.01
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01P1/20,H01P7/00
Applicant(s) Name: Kyocera Corporation Address:
Inventor(s) Name: Ninomiya Hiro
Attorney & Agent: li xianglan
Abstract:
     Disclosed is a bandpass filter comprising a first resonator 1 to a sixth resonator 6 having lengths of basically 1/4 wavelength, an input section IN connected to an ungrounded end of the first resonator, and an output section OUT connected to an ungrounded end of the sixth resonator, wherein the second to fifth resonators 2 - 5 are electromagnetically coupled with each other, the second and the third resonators are respectively coupled to the first resonator via the first and the second capacitances C 1 ,C 2, the third and the fourth resonators are respectively coupled to the sixth resonator via the third and the fourth capacitances C 3 ,C 4, and the input section IN and output section OUT are coupled to the first resonator and sixth resonator through an input and output capacitances C 5, C 6, respectively. This bandpass filter can be a small size, low loss filter suitable for UWB (Ultra Wide Band).
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