| 摘要 |
A band pass filter using interdigital coupled lines having a low insertion loss is provided to lower the insertion loss generated in the coupled lines by forming the interdigital coupled line. A band pass filter using interdigital coupled lines having a low insertion loss includes a signal input terminal(110), a signal output terminal(120), a coupled line(130), a first spiral open stub(210), and a first horizontal open stub(220). The signal input terminal(110) inputs a signal having an input terminal microstrip transmission line. The signal output terminal(120) outputs a signal having an output terminal microstrip transmission line. The coupled line(130) couples the signal input terminal(110) with the signal output terminal(120). The first spiral open stub(210) is symmetrically formed on the input terminal microstrip transmission line, and constrains a first harmonic wave. The first horizontal open stub(220) is horizontally formed between the first spiral open stub(210) and the input terminal microstrip transmission line, and constrains a fifth harmonic wave. |
