IRANIAN JOURNAL OF ELECTRICAL AND ELECTRONIC ENGINEERING

en A Single-Layer Ultra-Wideband Dual-Channel Differential Phase Shifter Using Coupled Lines 5-Microwave Passive Circuits Microwave Passive Circuits Research Paper Research Paper <h1 style="margin-bottom:16px; text-align:justify; text-indent:10.0mm">In this work, a broadband dual-channel differential phase shifter is developed with a small phase deviation across a wide frequency range. The design consists of two main lines for 45° and 90° phase shifts, along with a reference line. A prototype is fabricated and measured to validate the performance of the design. Phase shifts of 45° ± 5° and 90° ± 5° over a frequency range of 1.26 GHz - 4 GHz (bandwidth of 104%) are achieved from the channels. The transmission losses of the three lines are less than 0.35 dB and the isolation between the adjacent ports is better than 20 dB. The area of this dual-channel differential phase shifter is <img alt="" id="_x0000_i1025" o:ole="" src="file:///C:UsersardalanAppDataLocalTempmsohtmlclip1�1clip_image001.wmz" style="width:27pt; height:18pt" >  (14.7 mm × 66.15 mm), where <img alt="" id="_x0000_i1026" o:ole="" src="file:///C:UsersardalanAppDataLocalTempmsohtmlclip1�1clip_image002.wmz" style="width:12pt; height:15.75pt" > is the guided wavelength at the center frequency. </h1> Coupled Line, Differential Phase Shifter, Microstrip Line, UWB Phase Shifter. 91 100 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-2594-1&slc_lang=en&sid=1 Robab Kazemi r.kazemi@tabrizu.ac.ir 1800319475328460013234 0000000282277673 Yes Faculty of Elctrical and Computer Engineering, University of Tabriz Zohreh Asadollahzadeh-Zia zohreh.asadzade@yahoo.com 1800319475328460013235 1800319475328460013235 No Faculty of Electrical and Computer Engineering, University of Tabriz Reza Masoumi rezamasoumi@tabrizu.ac.ir 1800319475328460013236 1800319475328460013236 No Faculty of Electrical and Computer Engineering, University of Tabriz