| Summary: | 碩士 === 逢甲大學 === 資訊電機工程碩士在職專班 === 96 === In the RF front-end of a modern communication system. Bandpass filter is very important component in the system. We proposed one filter which is center frequency at 2.4 GHz Narrow CPW filter, CPW main characteristic that it is a transmission line of a really single level and signal and ground are on the same level, This make series connection, circuit of component and connect in parallel very easy, it need not transmit like microstrip line must have via hole.Dispensing with the vertical trouble that bored a hole has not only reduced the expenses of the circuit of making. So will study coplanar waveguide to design the Narrow band(3%) bandpass filter in dissertation, prevents during the different frequency channel Crosstalk.The BPF used first order CPW and second order CPW study circuit and characteristic and performance.We used the bend in the skill produces the coupling improves the circuit performance,the compact circuit is again parallel compact circuit achieves the narrow.
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