Branching filter

Abstract

Abstract PURPOSE:To arrange each filter freely decentralizingly and to utilize space in a case effectively by constituting a low frequency area of a low pass filter and a high frequency area of a high pass filter and the low pass filter. CONSTITUTION:The low frequency area is covered by the low pass filter 10. The high frequency area consists of two rejection filters 26, a dielectric waveguide type high pass filter 12 and a board type low pass filter 14, and the low pass filter 14 has a higher cut-off frequency than that of the high pass filter 12. Thus, the signal of a transmission frequency Tx is outputted to an antenna ANT but cut off at the high frequency area and the signal of a reception frequency Rx inputted from the antenna ANT is cut off at the low frequency area but passes through the high frequency area and is fetched in an equipment. Thus, the branching filter arranged freely decentralizingly in the equipment is realized.

Inventors

• 👤 Hisao Sato
• 👤 久夫 佐藤
• 👤 Terutaka Sugano
• 👤 菅野　照登

Bibliographic Details