Compact microstrip lowpass filter with ultra-sharp roll-off and ultra-wide stopband using stepped impedance Hairpin resonator

详细信息    查看全文

• 作者：Mohsen Hayati^a ; ^c ; ^{Mohsen_hayati@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; ^{hayati@razi.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Hamid Sherafat Vaziri^b ; Milad Ekhteraei^b ; Farzin Shama^b
• 关键词：Bended structure ; Lowpass filter (LPF) ; Microstrip ; Ultra-sharp roll-off ; Ultra-wide stopband
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：127
• 期：13
• 页码：5221-5225
• 全文大小：968 K

文摘

A novel microstrip lowpass filter (LPF) with very sharp roll-off, compact size and ultra-wide stopband is presented in this paper. The structure consists of modified stepped impedance Hairpin resonator and a circular patch as a suppressor. The proposed LPF has the cut-off frequency of 1.07 GHz. The simulation results indicated that the transition-band of the proposed LPF is 0.09 GHz from −3 to −20 dB. Maximum insertion-loss at about 80% of the passband is 0.1 dB. The proposed LPF has been designed, fabricated and measured. From the measurements, good agreements with the simulated results are obtained. Also, an ultra-wide stopband was achieved. Proposed LPF has an ultra high figure-of-merit (FOM) of 151,523, which shows its strong efficiency.