%0 Journal Article
%T A Distributed Variable Delay Line for Wideband Beam-Formers
%A Saliba Dabbagh
%A Loay D. Khalaf
%A Mohammed Hawa
%J PIER     Letters
%D 2012
%I EMW Publishing
%R 10.2528/PIERL12040213
%X 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 8.6 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 ¦Ìm BiCMOS process and occupies 252 ¦Ìm ¡Á 123 ¦Ìm of silicon area.
%U http://www.jpier.org/pierl/pier.php?paper=12040213