PIER Letters
 
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 33 > pp. 37-46

A DISTRIBUTED VARIABLE DELAY LINE FOR WIDEBAND BEAM-FORMERS

By S. Dabbagh, L. D. Khalaf, and M. Hawa

Full Article PDF (499 KB)

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.

Citation:
S. Dabbagh, L. D. Khalaf, and M. Hawa, "A Distributed Variable Delay Line for Wideband Beam-Formers," Progress In Electromagnetics Research Letters, Vol. 33, 37-46, 2012.
doi:10.2528/PIERL12040213

References:
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

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

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

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

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.

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

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.

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

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


© Copyright 2010 EMW Publishing. All Rights Reserved