volume | PIER Journals

Abstract

This paper presents a design methodology that significantly increases the peak power handling capability (PPHC) of microstrip filters. The PPHC is limited in microstrip technology by the corona effect: a physical phenomenon caused by the ionization of the air under the presence of strong electric fields around the planar circuit. Microstrip filters with a low electric field strength in the air increases the corona threshold level, resulting in high PPHC. Conventional stepped impedance (SI) filters, which consist of cascaded step-shaped elements, exhibit sharp discontinuities. These geometric edges amplify the electric field strength in the air, consequently reducing the corona threshold. Our research group has recently reported a new synthesis technique that introduces a smooth-profile (SP) conductor strip. This SP strip eliminates any sharp discontinuities and significantly reduces the strength of the electric field. This paper focuses on the examination of the high power performance of 7th-order SP and SI low-pass filters. The cut-off frequency (f_c) for both types of filters is set at 447.45 MHz, while the frequency for maximum stop-band rejection (f_o) is 1 GHz. The findings indicate that the SP filter shows a notable enhancement in peak power handling capability (PPHC), with gains of 2.48 dB and 4.80 dB observed at critical pressure and ambient pressure, respectively.

1. Cameron, R. J., C. M. Kudsia, and R. R. Mansour, Microwave Filters for Communication Systems, 2nd Ed., Wiley, Somerset, U.K., 2018.
doi:10.1002/9781119292371

2. Maxwell, J. C., A Treatise on Electricity and Magnetism, 3rd Ed., Vol. 2, 68-73, Clarendon, Oxford, 1892.

3. Woode, A. and J. Petit, "Diagnostic investigations into the multipactor effect, susceptibility zone measurements and parameters affecting a discharge," ESTEC Working Paper 1556, Eur. Spacy Agency, Noordwijk, The Netherlands, Nov. 1989.

4. Anderson, D., U. Jordon, M. Lisak, T. Olsson, and M. Ahlander, "Microwave breakdown in resonators and filters," IEEE Trans. Microw. Theory Techn., Vol. 47, No. 12, 2547-2556, Dec. 1999.
doi:10.1109/22.809005

5. MacDonald, A. D., Microwave Breakdown in Gases, Wiley, New York, NY, USA, 1966.

6. Raizer, Y. P., Gas Discharge Physics, Springer, Berlin, Germany, 1991.
doi:10.1007/978-3-642-61247-3

7. Woo, R., "Final report on RF voltage breakdown in coaxial transmission lines," Tech. Rep. 32-1500, Jet Propulsion Lab, CA, U.S.A., Oct. 1970.

8. Puech, J., M. Merecki, D. Anderson, M. Buyanova, D. Doroshkina, U. Jordan, L. Lapierre, M. Lisak, V. E. Semenov, J. Sombrin, and R. Udilijak, "Microwave discharge research activities within the contest of the Chalmers University (Sweden)/Institute of Applied Physics (Russia)/CNES (France) project," Proc. 4th Int. Workshop on Multipactor, Corona and Passive Intermodulation in Space RF Hardware (MULCOPIM), Sep. 2003.

9. Levy, R. and S. B. Cohn, "A history of microwave filter research, design, and development," IEEE Trans. Microw. Theory Tech., Vol. 32, No. 9, 1055-1067, Sept. 1984.
doi:10.1109/TMTT.1984.1132817

10. Levy, R., R. V. Snyder, and G. Matthaei, "Design of microwave filters," IEEE Trans. Microw. Theory Tech., Vol. 50, No. 3, 783-793, Mar. 2002.
doi:10.1109/22.989962

11. Hunter, I. C., L. Billonet, B. Jarry, and P. Guillon, "Microwave filters --- Applications and technology," IEEE Trans. Microw. Theory Tech., Vol. 50, No. 3, 794-805, Mar. 2002.
doi:10.1109/22.989963

12. Matthaei, G., L. Young, and E. M. T. Jones, Microwave Filters, Impedance-matching Networks, and Coupling Structures, Artech House, Inc., 1980.

13. Arnedo, I., I. Arregui, M. Chudzik, F. Teberio, A. Lujambio, D. Benito, T. Lopetegi, and M. A. G. Laso, "Direct and exact synthesis: Controlling the microwaves by means of synthesized passive components with smooth profiles," IEEE Microwave Magazine, Vol. 16, No. 4, 114-128, May 2015.
doi:10.1109/MMM.2015.2394011

14. Arnedo, I., M. Chudzik, J. M. Percaz, I. Arregui, F. Teberio, D. Benito, T. Lopetegi, and M. A. G. Laso, "Synthesis of one dimensional electromagnetic bandgap structures with fully controlled parameters," IEEE Trans. Microw. Theory Techn., Vol. 65, No. 9, 3123-3134, Sept. 2017.
doi:10.1109/TMTT.2017.2722401

15. Woo, W. and J. DeGroot, "Microwave absorption and plasma heating due to microwave breakdown in the atmosphere," IEEE Phys. Fluids, Vol. 27, No. 2, 475-487, 1984.
doi:10.1063/1.864645

16. Baher, H., Synthesis of Electrical Networks, John Wiley & Sons, New York, NY, USA, 1984.

17. Ozaki, H. and J. Ishii, "Synthesis of a class of strip-line filters," IRE Trans. Circuit Theory, Vol. 5, No. 2, 104-109, Jun. 1958.
doi:10.1109/TCT.1958.1086441

18. Wenzel, R. J., "Exact design of TEM microwave networks using quarter-wave lines," IEEE Trans. Microw. Theory Tech., Vol. 12, No. 1, 94-111, Jan. 1964.
doi:10.1109/TMTT.1964.1125757

19. Minnis, B. J., Designing Microwave Circuits by Exact Synthesis, Artech House, Norwood, MA, USA, 1996.

20. Carlin, H. J. and P. P. Civalleri, Wideband Circuit Design, CRC Press, Boca Raton, FL, USA, 1998.

21. Richards, P. I., "Resistor-transmission-line circuits," Proc. IRE, Vol. 36, No. 2, 217-220, Feb. 1948.
doi:10.1109/JRPROC.1948.233274

22. Morales-Hernandez, A. M., M. A. Sanchez-Soriano, S. Marini, et al. "Increasing peak power handling in microstrip bandpass filter by using rounded-end resonantors," IEEE Microw. Wireless Compon. Lett., Vol. 31, No. 3, 237-240, Mar. 2021.
doi:10.1109/LMWC.2021.3050765

23. Feced, R., M. N. Zerbas, and M. A. Muriel, "An efficient inverse scattering algorithm for the design of nonuniform fiber bragg gratings," IEEE J. Quantum Electron., Vol. 35, No. 8, 1105-1115, Aug. 1999.
doi:10.1109/3.777209

24. Skaar, J., Synthesis and characterization of fiber Bragg gratings, Ph.D. Dissertation, The Norwegian University of Science and Technology, Norway, 2000.

25. Skaar, J., L. Wang, and T. Erdogan, "On the synthesis of fiber bragg gratings by layer peeling," IEEE J. Quantum Electron., Vol. 37, No. 2, 165-173, Feb. 2001.
doi:10.1109/3.903065

26. Poladian, L., "Simple grating synthesis algorithm," Opt. Lett., Vol. 25, No. 11, 787-789, Jun. 2000.
doi:10.1364/OL.25.000787

27. Poladian, L., "Simple grating synthesis algorithm: Errata," Opt. Lett., Vol. 25, No. 18, 1400-1400, Sept. 2000.
doi:10.1364/OL.25.001400

28. Sanchez-Soriano, M. A., Y. Quere, V. Le Saux, et al. "Peak and average power handling capability of microstrip filters," IEEE Trans. Microw. Theory Techn., Vol. 67, No. 8, 3436-3448, Aug. 2019.
doi:10.1109/TMTT.2019.2919509

29. Morales-Hernandez, A., M. A. Sanchez-Soriano, S. Marini, et al. "Enhancement of corona discharge thresholds in microstrip bandpass filters by using cover-ended resonators," International Journal of Microwave and Wireless Technologies, Vol. 13, 708-718, Apr. 2021.
doi:10.1017/S1759078721000532

Mr. Jamil Ahmad

Dr. Jabir Hussain

Dr. Ivan Arregui

Dr. Petronilo Martin-Iglesias

Dr. Israel Arnedo

Dr. Miguel Laso

Prof. Txema Lopetegi