Fabrication of a Novel Diplexer Using Folded Open-Loop Ring Resonators and Microstrip Lines
关键词:
Diplexer, microstrip lines, microwave components, Open-Loop Ring Resonator (OLRR), standing wave摘要
A simple and novel low-loss diplexer with two folded Open-Loop Ring Resonators (OLRRs) that couple three microstrip lines is proposed. The first passband and second passband of the designed diplexer could be easily and accurately shifted to a desired frequency and construct the bandpass filters by adjusting the physical dimensions of the OLRRs. These results suggested that the proposed diplexer had the frequency-adjustable characteristics. The longer OLRR is placed between the upper and middle microstrip lines to generate a 2.4 GHz resonant frequency and the shorter OLRR is placed between the middle and lower microstrip lines to generate a 5.2 GHz resonant frequency. By adjusting the positions of the two OLRRs, the resonant frequencies can be tuned.
##plugins.generic.usageStats.downloads##
参考
D. M. Pozar, “Microwave engineering,” 2 nd edition, ch. 8, Wiley, New York, 1998.
S. S. Oh and Y. S. Kim, “A compact duplexer for IMT-2000 handsets using microstrip slow-wave open-loop resonators with high-impedance meander lines,” Radio Wireless Conf., 177-180, August 2001.
E. Goron, J. P. Coupez, C. Person, Y. Toutain, H. Lattard, and F. Perrot, “Accessing to UMTS filtering specifications using new microstrip miniaturized loop-filters,” IEEE MTT-S Int. Microw. Symp. Dig., 1599-1602, June 2003.
J. Konpang, “A compact diplexer using square open loop with stepped impedance resonators,” Asia-Pacific Microwave Conference, 1-4, 2008.
S. Srisathit, S. Patisang, R. Phromloungsri, S. Bunnjaweht, S. Kosulvit, and M. Chongcheawchamnan, “High isolation and compact size microstrip hairpin diplexer,” IEEE Microw. Wireless Compon. Lett., vol. 15, no. 2, 101-103, February 2005.
H. A. Cabral, S. T. G. Bezerra, and M. T. de Melo, “A diplexer for UMTS applications,” IEEE MTT-S International Microwave and Optoelectronics Conference, 215-217, 2009.
K. H. Li, C. W. Wang, and C. F. Yang, “A miniaturized diplexer using planar artificial transmission lines for GSM/DCS applications,” Asia-Pacific Microwave Conference, 1-4, 2007.
Q. Xue and J. X. Chen, “Compact diplexer based on double-sided parallel-strip line,” Electronics Letters, vol. 44, no. 2, 123-124, January 2008.
X. W. Chen, W. M. Zhang, and C. H. Yao, “Design of microstrip diplexer with wide band-stop,” International Conference on Microwave and Millimeter Wave Technology, 1-3, 2007.
Shi, J., J.-X. Chen, and Z.-H. Bao, “Diplexers based on microstrip line resonators with loaded elements,” Progress In Electromagnetics Research, Vol. 115, 423-439, 2011.
C. M. Tsai, S. Y. Lee, C. C. Chuang, and C. C. Tsai, “A folded coupled-line structure and its application to filter and diplexer design,” IEEE MTT-S Int. Microw. Symp. Dig., 1927-1930, June 2002.
W. Q. Xu, M. H. Ho, and C. G. Hsu, “UMTS diplexer design using dual-mode stripline ring resonators,” Electronics Letters, vol. 43, no. 13, 721-722, June 2007.
C. Y. Chen and C. Y. Hsu, “A simple and effective method for microstrip dual-band filters design,” IEEE Microw. Wireless Compon. Lett., vol. 16, no. 5, 246-248, May 2006.
J. S. Hong and M. J. Lancaster, “Couplings of microstrip square open-loop resonators for crosscoupled planar microwave filters,” IEEE Trans. Microw. Theory Tech., vol. 44, no. 12, pp. 2099- 2108, December 1996.
J. S. Hong, “Microstrip filters for RF/microwave applications,” 2nd edition, Wiley, New York, 2011.
X. Y. Zhang and Q. Xue, “Harmonic-suppressed bandpass filter based on discriminating coupling,” IEEE Microw. Wireless Compon. Lett., vol. 19, no. 11, pp. 695-697, November 2009.
Y. C. Li, X. Y. Zhang, and Q. Xue, “Bandpass filter using discriminating coupling for extended out-of-band suppression,” IEEE Microw. Wireless Compon. Lett., vol. 20, no. 7, pp. 369-371, July 2010.
V. K. Velidi, U. Prabhakaran, A. V. G. Subramanyam, D. Sivareddy, and V. V. Srinivasan, “Design of compact microstrip diplexer with high selectivity,” International Conference on Signal Processing and Communications (SPCOM), 10.1109/SPCOM.2012.6290012, 2012.
H. W. Wu, S. H. Huang, and Y. F. Chen, “Design of new quad-channel diplexer with compact circuit size,” IEEE Microw. Wireless Compon. Lett., vol. 23, no. 5, pp. 240-242, May 2013.
