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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 7, July 2000

Table of Contents for this issue

Complete paper in PDF format

On The Performance of HTS Microstrip Quasi-Elliptic Function Filters for Mobile Communications Application

Jia-Sheng Hong, Member, IEEE Michael J. Lancaster, Member, IEEE Dieter Jedamzik, Robert B. Greed and Jean-Claude Mage Associate Member, IEEE

Page 1240.

Abstract:

The low-loss and high-selective high-temperature superconducting (HTS) bandpass filters can enhance performance of mobile communications systems. In this paper, we summarize a recent progress of novel HTS preselect bandpass filters that have been developed for a European research project. The objective of the project is to construct an HTS-based transceiver for mast-mounted DCS1800 base stations. The HTS preselect receive filters have been designed to have a quasi-elliptic function response in order to provide low insertion loss and very steep rolloff at the filter band edges. The filters cover a 15-MHz sub-band of a receive band, which ranges from 1710 to 1785 MHz. The filters have been fabricated using double-sided YBCO thin films on 0.3-mm-thick MgO or 0.5-mm-thick LAO substrates. The latest experimental results of the filters,including those encapsulated with a low-noise amplifier in an RF module are presented, showing very promising performance. The issues associated with asymmetric frequency response are investigated to improve the filter performance.

References

  1. D. Jedamzik, R. Menolascino, M. Pizarroso and B. Salas, "Evaluation of HTS sub-systems for cellular basestations", IEEE Trans. Appl. Superconduct., vol. 9, pp.  4022-4025,  June  1999.
  2. STI Inc. "A receiver front end for wireless base stations", Microwave J., vol. 39, no. 4, pp.  116-120, 1996.
  3. S. H. Talisa, M. A. Robertson, B. J. Meler and J. E. Sluz, "Dynamic range considerations for high-temperature superconducting filter applications to receive front ends", in IEEE MTT-S Int. Microwave Symp. Dig., 1997, pp.  997-1000. 
  4. R. B. Hammond, "HTS wireless filters: Past, present and future performance", Microwave J., vol. 41, no. 10, pp.  94-107, 1998.
  5. G. Koepf, "Superconductors improve coverage in wireless networks", Microwave RF, vol. 37, no. 4, pp.  63-72, Apr.   1998.
  6. Y. Vourc'h, G. Auger, H. J. Chaplopka and D. Jedamzik, "Architecture of future basestations using high temperature superconductors", in ACTS Mobile Summit, Aalbourg, Denmark,Sept. 1997, pp.  802-807. 
  7. R. B. Greed, D. C. Voyce, J.-S. Hong, M. J. Lancaster, M. Reppel, H. J. Chaloupka, J. C. Mage, R. Mistry, H. U. Häfner, G. Auger and W. Rebernak, "An HTS transceiver for third generation mobile communications-European UMTS", in IEEE MTT-S European Wireless Symp. Dig., 1998, pp.  98-103. 
  8. D. Zhang, G.-C. Liang, C. F. Shih, Z. H. Lu and M. E. Johansson, "A 19-pole cellular bandpass filter using 75-mm-diameter high-temperature superconducting film", IEEE Microwave Guided Wave Lett., vol. 5, pp.  405-407, Nov.  1995.
  9. J.-S. Hong, M. J. Lancaster, D. Jedamzik and R. B. Greed, "8-pole superconducting quasielliptic function filter for mobile communications application", in IEEE MTT-S Int. Microwave Symp. Dig., 1998, pp.  367-370. 
  10. G. Tsuzuki, M. Suzuki, N. Sakakibara and Y. Ueno, "Novel superconducting ring filter", in IEEE MTT-S Int. Microwave Symp. Dig., 1998, pp.  379-382. 
  11. M. Reppel, H. Chaloupka, J. Holland, J.-S. Hong, D. Jedamzik, M. J. Lancaster, J.-C. Mage and B. Marcilhac, "Sperconducting preselect filters for base transceiver stations", in ACTS Mobile Commun. Summit, Rhodes, Greece, June 1998.
  12. E. R. Soares, K. F. Raihn, A. A. Davis, R. L. Alvarez, P. J. Marozick and G. L. Hey-Shipton, "HTS AMPS-A and AMPS-B filters for cellular receive base stations", IEEE Trans. Appl. Superconduct., vol. 9, pp.  4018-4021, June  1999.
  13. J.-S. Hong, M. J. Lancaster, D. Jedamzik and R. B. Greed, "On the development of superconducting microstrip filters for mobile communications application", IEEE Trans. Microwave Theory Tech., vol. 47, pp.  1656-1663, Sept.  1999 .
  14. "EM User's Manual ver. 2.4", Sonnet Software Inc., New York, 1993.