Browse > Article
http://dx.doi.org/10.5515/JKIEES.2007.7.3.134

The Compact UHF CT-Type BandPass Filter with a Mixed Coupling  

Ju, Jeong-Ho (Dept. of Information & Telecommunication Engineering, University of Incheon)
Kahng, Sung-Tek (Dept. of Information & Telecommunication Engineering, University of Incheon)
Publication Information
Journal of electromagnetic engineering and science / v.7, no.3, 2007 , pp. 134-137 More about this Journal
Abstract
This paper presents the design of the compact UHF Bandpass filter of CT-type with a novel mixed coupling topology. In further detail, this new coupling structure mathematically equals the transmission zero that enables particularly the better rejection performance in the stopband without increasing the filter's order. To envision this design concept, we fabricated a microstrip filter whose measurement proves to agree with the predicted performance and the suggested coupling structure reduces the overall size, and will be possibly used in the miniaturized UHF apparatus such as the RFID system.
Keywords
Bandpass Filter; UHF Application; Cascaded Triplet(CT); Cross-Coupling; Mixed Coupling; Size Reduction;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. Kahng et al., 'A dual-mode narrow-band channel filter and group-delay equalizer for a Ka-band satellite', ETRI Journal, vol. 25, pp. 379-386, Oct. 2003   DOI   ScienceOn
2 S. Kahng, 'Study of the design of waveguide filters with improved suppression of modal interference through the cross-shaped slot', International Journal of RF and Microwave Computer-Aided Engineering, vol. 13, pp. 285-292, May 2003   DOI
3 C.-C Hong, M. J. Chang, 'Microstrip cascade trisection filter', IEEE MWCL., vol. 9, pp. 271-273, Jul. 1999
4 J.-S. Hong, M. J. Lancaster, 'Microstrip cross-coupled trisection bandpass filters with asymmetric frequency characteristics', IEE Proceedings on Microwave, Antennas and Propagation, vol. 146, pp. 84- 90, Feb. 2003
5 E. Hanna et al., 'Cross-coupled suspended stripline trisection bandpass filters with open-loop resonators', IEEE Trans. on MTT, vol. 53, pp. 42-46, Jul. 2005