Wideband Gysel Power Divider Based on Parallel-Coupled Microstrip Line with Bandstop Filter for the 2nd Harmonic Suppression

N. Angkawisittpan,

Research Unit for Computational Electromagnetic and Optical Systems, Department of Electrical Engineering, Faculty of Engineering, Mahasarakham University, Maha Sarakham, Thailand

Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

S. Sonasang, S. Srisawat

Graduate School, Mahasarakham University, Maha Sarakham, Thailand

And R. Phromloungsri

UDRU-Microwave Research Laboratory, Department of Electronics Engineering,Faculty of Technology, Udon Thani Rajabhat University Udon Thani, Thailand

Manuscript received October 1, 2015

Revised October 26, 2015


This paper presents a new design of wideband in-phase power divider/combiner with parallel-coupled microstrip line. The proposed design applies a modified Gysel structure for an increased passband bandwidth and spurious response suppression (at the 2ndharmonic frequency) with Bandstop filter (BSF). Simulated and measured results at the 900 MHz operating frequency of the conventional and the proposed Gysel power dividers with BSF are compared. The measured results exhibit the insertion loss of less than 3.0 dB (S21, S31) and the return loss of more than 20 dB (S11, S22, S33) with wideband at the 900 MHz. Moreover, the proposed Gysel power divider provides the 2nd harmonic frequency suppression of more than 10 dB. 

Keyword: Microstrip, Gyseal power divider, Parallel-coupled microstrip line, and Bandstop filter

pdf-iconpdf File Size: 218.87 KB




Mahanakorn University of Technology

140 Moo 1, Cheum-Sampan Road, Nongchok, Bangkok, Thailand 10530

Tel: +(662)988-3655  Fax: +(662)988-4027

designed by sutit.ongart@gmail.com