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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2010-06-12
Compact Ultra-Wideband Phase Shifter
By
Mohammad Naser-Moghadasi,

    Dr. Mohammad Naser-Moghadasi

    Science and Research Branch

    Islamic Azad University

    Iran

    Homepage

Gholamreza R. Dadashzadeh,

    Dr. Gholamreza R. Dadashzadeh

    Faculity of Engineering

    Shahed University

    Iran

    Homepage

Abdolmehdi Dadgarpour,

    Mr. Abdolmehdi Dadgarpour

    Electrical Engineering Department

    Islamic Azad University

    Iran

    Homepage

Farid Jolani,

    Dr. Farid Jolani

    Department of Electrical and Computer Engineering

    University of Calgary

    Canada

    Homepage

Bal Singh Virdee

    Prof. Bal Singh Virdee

    Faculty of Computing

    London Metropolitan University

    UK

    Homepage

Progress In Electromagnetics Research Letters, Vol. 15, 89-98, 2010
doi:10.2528/PIERL10032606 | Google Scholar

Abstract
Design of a compact planar phase shifter is described that possesses ultra-wideband (UWB) performance. The proposed device is composed of 50Ω input/output microstrip-lines which are connected to a low-impedance rectangular microstrip patch, and located at close proximity to each other. The common ground-plane incorporates a slot-line terminated with two rectangular slots, which are located under the rectangular patches in order to provide effective electromagnetic coupling between the microstrip-line and slot-line. Thus a phase shifter is realized with ultra-wideband characteristics on a single substrate. The length of the slot-line and width of patch determines the desired phase shift required between the input and output ports. It is demonstrated that the design can provide phase shift anywhere between 4°- 27° across the entire UWB frequency band from 3.1 to 10.6 GHz. The simulated results show fixed phase shift 5.625°± 0.865°, 11.25°± 1.93°and 22.5°± 2.5°with insertion-loss less than 0.5 dB and return loss better than 12 dB across the ultra-wideband frequency span. The phase shifter is relatively compact in size with a dimension of 15×25 mm2. The phase shifter was fabricated and its performance measured to validate the simulation results.
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Citation
Mohammad Naser-Moghadasi, Gholamreza R. Dadashzadeh, Abdolmehdi Dadgarpour, Farid Jolani, and Bal Singh Virdee, "Compact Ultra-Wideband Phase Shifter," Progress In Electromagnetics Research Letters, Vol. 15, 89-98, 2010.
doi:10.2528/PIERL10032606
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