Pi type resistance attenuator

Abstract

Abstract PURPOSE:To decrease the amount of unmatched attenuation and to uniform the performance, by dividing an input parallel resistor into a plurality of resistors and inserting a ferrite troidal core to a center conductor connecting the parallel resistors. CONSTITUTION:An input side parallel resistor of pi type resistance attenuator is divided into a plurality of resistors R11, R12, R13 and R14 and ferrite troidal cores L1-L5 are inserted to a center conductor 5 from an input terminal 1 to a series resistor R3. The position of insertion is each connecting point between the input terminal 1 and the resistor R3. As the number of the cores L1-L5 is increased from the input terminal 1, the voltage standing wave ratio VSWR can be improved.

Inventors

• 👤 Masaru Watanabe
• 👤 勝 渡辺

Bibliographic Details