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http://dx.doi.org/10.6109/JKIICE.2009.13.7.1272

The design and Fabrication of Bandpass Filter Using Step Impedance Resonators of Coaxial Type  

Lee, Jung-Nam (전남대학교 전자통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.13, no.7, 2009 , pp. 1272-1278 More about this Journal
Abstract
The present paper is purposeful that I compare the materialization method of the filter of UIR and SIR, then make two filters of different methods, so both are useful. The structure of the method of UIR is simple, so it is used a commercial point of view that the client gets the characteristics what he wants. However, the needs of companies when compared to the same standards, a little more cheaply in price, a little smaller in size, better performance characteristics are expected. In this regard, the method of SIR is smaller than UIR in size, but it shows the similar characteristics of UIR, so it is expected that holds a dominant position in competitive power. In this paper, based on these conditions, I compared the methods of SIR and UIR after the design and production. The standards are Insertion Loss is less than 0.8dB, Return Loss is above 20.0dB, and the Ripple is within 0.3dB. The center frequency is settled 881.5MHzband that TX Band is used by CDMA(SKT). I compared in the same conditions in Bandwidth 25.0MHz.
Keywords
SIR; Bandpass Filter; Coaxial; CDMA;
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