high frequency filter

Abstract

Abstract PURPOSE:To form a high frequency filter for a resonance line of <= lambda/4 in length by connecting terminals of a resonance line provided on a dielectric board except an external connection terminal through a capacitor. CONSTITUTION:A 1st capacitor 3 is provided to a gap 2 of a resonance line 1 of nearly channel shape in a 1st turning circuit 11 and a 2nd capacitor 5 is provided between one end of the gap 2 and an externally connection terminal 4. The 1st turning circuit 11 and a 2nd turning circuit 12 of the same constitution as the circuit 11 are coupled by a coupling section 6. Further, the other end of the gap 2 at each resonance line is connected to ground through a 3rd capacitor 7. The resonance frequency is lowered by 10-20% by connecting the other end through the 3rd capacitor 7 in this way and the resonance line is reduced equivalently. Thus, the high frequency filter is formed by the resonance line having a length of <= lambda/4.

Inventors

• 👤 Yoshikazu Hamazawa
• 👤 浜沢　良和

Bibliographic Details