论文信息 - Design of compact microstrip diplexer with simple coupled resonators

Design of compact microstrip diplexer with simple coupled resonators

This article presents a microstrip diplexer with 2.4/5.2 GHz response by using the simple coupled resonators for reducing the circuit size. Stepped impedance resonator (SIR) can be shared by the two filter channels for the designed diplexer if their fundamental and the higher order frequencies are properly assigned. The diplexer has only three simple resonators which can achieve both two good passbands and effectively reduce the circuit size. Measured results of the proposed diplexer have a good agreement with the electromagnetic (EM) simulated results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1222–1225, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI.10.1002/mop.22397

[1] C. Person,et al. Accessing to UMTS filtering specifications using new microstrip miniaturized loop-filters , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[2] M. Makimoto,et al. Bandpass Filters Using Parallel Coupled Strip-Line Stepped Impedance Resonators , 1980 .

[3] Ruey-Beei Wu,et al. Microstrip diplexers design with common resonator sections for compact size, but high isolation , 2006 .

[4] Young Sik Kim,et al. A compact duplexer for IMT-2000 handsets using microstrip slow-wave open-loop resonators with high-impedance meander lines , 2001, Proceedings RAWCON 2001. 2001 IEEE Radio and Wireless Conference (Cat.No.01EX514).

[5] Jia-Sheng Hong,et al. Microstrip filters for RF/microwave applications , 2001 .

[6] Jen-Tsai Kuo,et al. Design of microstrip bandpass filters with a dual-passband response , 2005 .

[7] S. Kosulvit,et al. High isolation and compact size microstrip hairpin diplexer , 2005, IEEE Microwave and Wireless Components Letters.