| 摘要 |
<p>A microwave filter comprising microwave input ports 3,4 and first output port 5, the filter having a transmit passband about a frequency f1 below a band edge between the first microwave input port and first microwave output port and a second transmit passband about a frequency f2 above the band edge between the second microwave input port and microwave output port, the microwave filter comprising: a first signal splitter 12; a second signal splitter 13; the first and second signal splitters having first and second connection ports 18, 19; the two first connection ports 18 being connected together by a first signal line comprising a first filter block 23; the two second connection ports 19 being connected together by a second signal line comprising a second filter block 23; the filter blocks being identical; the filter blocks comprising a plurality of resonators, at least one of the resonators being a remote resonator having a resonant frequency remote from the band adapted to produce receive passbands between the microwave output port and first and second microwave input ports about a frequency f3.</p> |
