volume | PIER Journals

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 8.6^o 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.

1. Hashemi, H., H. Krishnaswamy, K. Newton, and J. Roderik, "Silicon-based ultra-wideband beamforming," IEEE Journal of Solid-State Circuits, Vol. 41, No. 8, 1726-1739, Aug. 2006.
doi:10.1109/JSSC.2006.877257 Google Scholar

2. Hashemi, H., T.-S. Chu, and J. Roderik, "Integrated true-time-delay-based ultra-wideband array processing," IEEE Communication Magazine, 162-172, Sep. 2008.
doi:10.1109/MCOM.2008.4623722 Google Scholar

3. Bahl, I., Lumped Elements for RF and Microwave Circuits, 1st Ed., Artech House, London, 2003.

4. Alioto, M. and G. Palumbo, Model and Design of Bipolar and MOS Current Mode Logic: CML, ECL and SCL Digital Circuits, 1st Ed., Springer, USA, 2005.

5. Kao, M.-S., J.-M.Wu, C.-H. Lin, F.-T. Chen, and S. S. H. Hsu, "A 10-Gb/s CML I/O circuit for backplane interconnection in 0.18-μm CMOS technology," IEEE Transactions on Very Large Scale Integrated (VLSI), Vol. 17, No. 5, 688-696, May 2009.
doi:10.1109/TVLSI.2009.2016726 Google Scholar

6. Atrouz, B., A. Alimohad, and B. Aissa, "An effective jammers cancellation by means of a rectangular array antenna and a sequential block LMS algorithm: Case of mobile sources," Progress In Electromagnetics Research C, Vol. 7, 193-207, 2009.
doi:10.2528/PIERC09020501 Google Scholar

7. Hajj, M., M. Salah Toubet, Y. Abdallah, R. Chantalat, and B. Jecko, "A novel beam scanning/directivity reconfigurable M-EBG antenna array ," Progress In Electromagnetics Research C, Vol. 29, 55-66, 2012. Google Scholar

8. Kasi, B. and C. K. Chakrabarty, "Ultra-wideband antenna array design for target detection," Progress In Electromagnetics Research C, Vol. 25, 67-79, 2012.
doi:10.2528/PIERC11090607 Google Scholar

9. Nayeri, P., F. Yang, and A. Z. Elsherbeni, "Bandwidth improvement of reflectarray antennas using closely spaced elements," Progress In Electromagnetics Research C, Vol. 18, 19-29, 2011. Google Scholar

10. Bhattacharryya, A. K., Phased Array Antennas, John Wiley, NJ, 2006.

11. Alfred, Q. M., K. Bishayee, T. Chakravarty, and S. K. Sanyal, "A schematic for broadband beam formation using time-delay technique ," Progress In Electromagnetics Research M, Vol. 3, 131-139, 2008.
doi:10.2528/PIERM08042802 Google Scholar

12. Liang, G., W. B. Gong, H. J. Liu, and J. P. Yu, "Development of 61-channel digital beam-forming (DBF) transmitter array for mobile satellite communication ," Progress In Electromagnetics Research, Vol. 97, 177-195, 2009.
doi:10.2528/PIER09082303 Google Scholar

Dr. Saliba Dabbagh

Dr. Loay D. Khalaf

Dr. Mohammed Hawa