Design of the high attenuation low pass filter with wide stopband and ultra-wide bandpass filter with broad stopband

• Main Authors: LIN, HAN-CHIH, 林翰志
• Other Authors: TANG, CHING-WEN
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/j7w23m

碩士 === 國立中正大學 === 電機工程研究所 === 105 === There are two part of this thesis had been presented. The first part is the design of the high attenuation low pass filter with wide stopband at chapter 3. In order to achieve high selectivity, choosing the six-order low pass filter prototype by using butterworth method. To achieve stopband rejection, using slot line is effective to generate extra transmission zeros. In the second part, we will introduce the ultra-wide bandpass filter with broad stopband at chapter 4. First, by using parallel-coupled line to achieve filtering and adding a muti-mode resonator to achieve ultra-wideband. To suppress the harmonic, choosing the two-path coupled line to achieve broad stopband.