Title:
ELECTROMAGNETIC FIELD COUPLING TYPE FILTER
Document Type and Number:
Japanese Patent JP2021164076
Kind Code:
A
Abstract:
To provide an electromagnetic field coupling type filter that has a high no-load Q value and can provide many attenuation poles by using a half-wavelength resonator.SOLUTION: An electromagnetic field coupling type filter 1 includes three or more multiple lines 2i (i is an integer from 1 to n) in which adjacent half-wavelength resonator of a distributed constant type resonator are electromagnetically coupled and arranged in parallel, a first load capacitance element 3i that terminates one end of each line 2i, a second load capacitance element 4i that terminates the other end of the line 2i, a first stage coupling element 5i, i+1 that electrically connects one ends of adjacent line 2i, a second stage coupling elements 6i, i+1 that electrically connect the other ends of adjacent line 2i, and two input/output coupling elements 7, 7' that electrically connect the lines 21, 2n on both sides and input/output terminals 8, 8' outside thereof, and the aggregate of the plurality of lines 2i is asymmetric with respect to its center.SELECTED DRAWING: Figure 3
Inventors:
ISHIZAKI TOSHIO
Application Number:
JP2020064769A
Publication Date:
October 11, 2021
Filing Date:
March 31, 2020
Export Citation:
Assignee:
UNIV RYUKOKU
International Classes:
H01P1/202; H01P1/203; H01P1/205; H01P7/08; H03H7/09
Attorney, Agent or Firm:
Tsuneo Fujikawa