Design of Bandpass Filter With Wide Stopband/Tunable Frequency and Mutiband Antenna
碩士 === 國立中正大學 === 電機工程研究所 === 100 === This paper is divided into three parts. The first part introduce two bandpass filter with wide stopband. By cascading bandstop filter to produce multiple transmission zeros, reaching the effect of wide stopband, and design two various cases by using the feature...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/36524552973276688509 |
| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 100 === This paper is divided into three parts. The first part introduce two bandpass filter with wide stopband. By cascading bandstop filter to produce multiple transmission zeros, reaching the effect of wide stopband, and design two various cases by using the feature of bandstop filter.
The second part introduce a tunable bandpass filter, which using varactor connected to the end of transmission line to reach the feature of frequency tuning.
The third part introduce a multiband antenna. Using CPW-fed by multiple route Structure and impedance matching to design (1.9/2.4/5.2GHz) antenna.
All of the above mentioned circuits are simulated with the full-wave electromagnetic simulator IE3D. Moreover, the prototypes of these circuits are fabricated and measured. The good matched results between electromagnetic
simulation and measurement can evidence the availability of all proposed circuits.
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