Design and Implementation of Miniaturized Parallel-Coupled Bandpass Filter with Wide Stopband for GSM Application

• Main Authors: You-Hao Chen, 陳宥豪
• Other Authors: Shry-Sann Liao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/yk493w

碩士 === 逢甲大學 === 通訊工程所 === 100 === This paper proposed parallel-coupled bandpass filter with wide stopband for GSM. The design of the basic structure is traditional parallel-coupled bandpass filter. We used of over-coupling to improve the parallel coupled microstrip line of odd and even mode phase match. It is difference with the traditional input port and output port. We used the asymmetric tapped-line to suppression high frequency spurious. We also added the miniaturization technology. The circuit size was reduced to 25%. And it is suppression more than seven times of spurious responses. Above circuits have rather satisfactory conformity between simulation and measurement results.