Design of Tunable Filters Using z-Transform Technique and Induced Bandpass Method
碩士 === 國立臺灣科技大學 === 電子工程系 === 98 === In this thesis, we propose the two design method of tunable filters, one is equal-length two-section stubs and another one is the composite method adopting both the discrete-time domain method and induced passband scheme. We determine the construction of filter...
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| Format: | Others |
| Language: | en_US |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/79631557790990997211 |
| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 98 === In this thesis, we propose the two design method of tunable filters, one is equal-length two-section stubs and another one is the composite method adopting both the discrete-time domain method and induced passband scheme. We determine the construction of filter and design method according to the frequency response. Finally, we propose the design method that we can implement three types of filters including tunable bandstop/bandpass filter and tunable narrow bandpass filter.
Microwave tunable bandstop and bandpass filter design using equal-length transmission lines is presented. Varactors shunted with one-section and two-section stubs are employed to control the center frequency of the filters. The tunable bandstop filter is featured with extended upper passbands. The tunable bandpass filter is featured with reduced harmonic passbands and IP3 value of 43.5 dBm.
Tunable narrow bandpass filter using z-transform technique and induced bandpass method. Varactors diode shunted with two-section stubs are employed to control the center frequency of the narrow bandpass filter. In addition, extended upper passbands is characteristic of the tunable narrow bandpass filter.
Eventually, Experimental results are presented to illustrate the validity of the two design method.
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