volume | PIER Journals

Abstract

A technique that expands dynamic range (DR) of frequency down-converters in the C band frequency is presented. Primary characteristics of down-converter are evaluated to confirm that it can be used in microwave receivers. The C band down-converter is carried out by the combination of RF mixers, band pass interdigital filter, and X band combline filter which are designed entirely for this project. Attainment of the perfect receiver is the final purpose of this paper, and a method that causes 72 dB dynamic range, high tangential signal sensitivity and fine gain flatness is used for achieving the mentioned purpose. These efforts improve the dynamic range about 19 dB and gain flatness about 3.07 dB.

1. Tsui, J. B. Y., Digital Techniques for Wideband Receivers, 2nd Ed., 220, Artch House Inc., 2001.

2. Le, G. Y., O. Gaborieau, P. Gamand, M. Isberg, P. Jakobsson, L. Jonsson, et al. "Highly integrated direct conversion receiver for GSM/GPRS/EDGE with on-chip -84 dB dynamic range continuous-time ΣΔ ADC," IEEE Journal of Solid State Circuits, Vol. 40, 403-411, February 2005.
doi:10.1109/JSSC.2004.841036 Google Scholar

3. Yang, J., R. W. Brodersen, and D. Tse, "Addressing the dynamic range problem in cognitive radios," IEEE International Conference on Communication, Vol. 1--14, 5183-5188, 2007.
doi:10.1109/ICC.2007.857 Google Scholar

4. Kim, S. H., M. Okada, and T. Hara, "A study on the adaptive RF frontend for low power consumption ISDB-T receiver," Proceeding of Military Communications Conference, 1-6, October 2007. Google Scholar

5. Li, K., J.-Y. Huang, and J.-F. Teng, "Research on receiver dynamic range extension with adjustable attenuator," 5th International Conference on Wireless Communications, Networking and Mobile Computing, 1-4, 2009. Google Scholar

6. Elbert, B. R., The Satellite Communication Applications Handbook, 2nd Ed., 81-82, Artech House, 2004.

7. Zheng, S. H., D. H. Xu, and X. M. Jin, "A new receiver architecture for smart antenna with digital beamforming," IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communication Proceeding, Vol. 1, 38-40, 2005.
doi:10.1109/MAPE.2005.1617841 Google Scholar

8. David, M. P., Microwave Engineering, 3rd Ed., Chapter 8, Wiley, 2005.

9. Merrill, I. S., Introduction to Radar Systems, 3rd Ed., 140, McGraw-Hill, 2001.

10. Bae, J.-H., W.-K. Choi, J.-S. Kim, G.-Y. Choi, and J.-S. Chae, "Study on the demodulation structure of reader receiver in a passive RFID environment," Progress In Electromagnetics Research, Vol. 91, 243-258, 2009.
doi:10.2528/PIER09021103 Google Scholar

11. Mathahu, G. L., L. Young, and E. M. T. Jones, Microwave Filters, Impedance --- Matching Networks, and Coupling Structures, McGraw-Hill, 1964.

12. Harrington, J. B., "Improving system and environmental DF accuracy," Tech. Notes, Vol. 9, No. 1, Watkins Johnson Company, January/February 1982.

13. Khaddaj Mallat, N., E. Moldovan, and S. O. Tatu, "Comparative demodulation results for six-port and conventional 60 GHz direct conversion receivers," Progress In Electromagnetics Research, Vol. 84, 437-449, 2008.
doi:10.2528/PIER08081003 Google Scholar

14. Wang, J., J. Ni, S. Zhao, and Y.-X. Guo, "Compact microstrip ring branch-line coupler with harmonic suppression," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 16, 2119-2126, 2009.
doi:10.1163/156939309790109216 Google Scholar

Mr. Vahid Saatchi

Mrs. Zeynab Tavakoli