Title:
STRIP LINE LOOP RESONATOR FILTER
Document Type and Number:
Japanese Patent JP2888027
Kind Code:
B2
Abstract:
PURPOSE: To obtain the strip line band pass filter with a wide band and high performance with respect to the strip line loop resonator filter used for various high frequency communication equipments so as to attain fine-adjustment of the center frequency.
CONSTITUTION: Two U-shaped strip lines 107 whose line impedance is Z2 and whose electric length is θ2 and a U-shaped strip line 108 whose line impedance is Z3 and whose electric length is θ3 are connected in parallel opposite to a U-shaped strip line 106 whose line impedance is Z1 and whose electric length is θ1. In the strip line loop resonator of the configuration as above, input output terminals are arranged on the strip line 106 opposite to each other symmetrically apart by 90° in an electric length, and a strip line stub 109 for the frequency adjustment is arranged in the middle of the strip line 108. The pass band width is controlled by changing the line impedance and a ratio of the electric length of the lines. Furthermore, the center frequency is fine-adjusted by trimming the strip line stub 109.
Inventors:
TAKAHASHI KAZUAKI
MAKIMOTO MITSUO
FUJIMURA MUNENORI
MAKIMOTO MITSUO
FUJIMURA MUNENORI
Application Number:
JP11711192A
Publication Date:
May 10, 1999
Filing Date:
May 11, 1992
Export Citation:
Assignee:
MATSUSHITA DENKI SANGYO KK
International Classes:
H01P1/203; H01P1/208; H01P7/08; (IPC1-7): H01P1/203; H01P1/208; H01P7/08
Domestic Patent References:
| JP637520A | ||||
| JP55104103A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
Previous Patent: FAULT RESISTING COMPUTER SYSTEM
Next Patent: EXHAUST EMISSION CONTROL DEVICE FOR DIESEL-ENGINE
Next Patent: EXHAUST EMISSION CONTROL DEVICE FOR DIESEL-ENGINE