PURPOSE: To obtain the small sized laminated dielectric filter in which a desired frequency characteristic is obtained without providing a stripe pattern orthogonal to a strip resonator electrode.
CONSTITUTION: Two strip resonator electrodes 11, 12 are arranged in parallel at the center position of a laminated board 10 in its direction of height. An earth electrode 13 is formed to each half of both side faces and the rest part is formed. to be an earth non-forming part 14. One-side ends 11a, 12a of the strip resonator electrodes are exposed to the earth non-forming part 14 to be open ends, and the other ends 11b, 12b of the strip resonance electrodes are connected to the earth electrode formed on the side faces to be short-circuit ends. When the length of the laminated board 10 is selected to be a 1/4 wavelength with respect to the resonance frequency, the length of the strip resonance electrodes is set accurately to be the 1/4 wavelength and then a desired frequency characteristic is obtained. Moreover, since only the strip resonator electrodes are in existence in the laminated board, the filter is made small.
| JP2002271109 | LAMINATED DUPLEXER ELEMENT |
| JP6867993 | filter |
| WO/1996/005628 | A FILTER WITH AN ADJUSTABLE SHUNT ZERO |
NAKAMURA NOBUAKI
MATSUSHITA YUJI
| JPH05299913A | 1993-11-12 | |||
| JPH0555810A | 1993-03-05 | |||
| JPH05110305A | 1993-04-30 | |||
| JPH05152804A | 1993-06-18 | |||
| JPH06125202A | 1994-05-06 | |||
| JPS61189001A | 1986-08-22 | |||
| JPS63312701A | 1988-12-21 | |||
| JPH0238805B2 | 1990-09-03 |