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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-06-22
A Distributed Variable Delay Line for Wideband Beam-Formers
By
Saliba Dabbagh,

    Dr. Saliba Dabbagh

    Electrical Engineering Department

    University of Jordan

    Jordan

    Homepage

Loay D. Khalaf,

    Dr. Loay D. Khalaf

    University of Jordan

    Jordan

    Homepage

Mohammed Hawa

    Dr. Mohammed Hawa

    Electrical Engineering Department

    University of Jordan

    Jordan

    Homepage

Progress In Electromagnetics Research Letters, Vol. 33, 37-46, 2012
doi:10.2528/PIERL12040213 | Google Scholar

Abstract
A fully integrated CMOS wideband distributed variable delay line for time array beam-formers is presented. The delay line works over a full differential mode, and the delay cell function is based on differential amplifiers with active inductive peaking loads. A delay resolution of 15 ps is obtained with a maximum delay capability of 150 ps . The designed active delay line provides 3 scanning angles with 8.6o degrees of spatial resolution. This delay line is applicable for a 4 channel beam-former with an operational bandwidth of 500 MHz centered at 5 GHz. Our active delay line consumes up to 352 mW of power from 2.5 V supply. The circuit is simulated in standard 0.25 μm BiCMOS process and occupies 252 μm × 123 μm of silicon area.
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Citation
Saliba Dabbagh, Loay D. Khalaf, and Mohammed Hawa, "A Distributed Variable Delay Line for Wideband Beam-Formers," Progress In Electromagnetics Research Letters, Vol. 33, 37-46, 2012.
doi:10.2528/PIERL12040213
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