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A study on the design of band pass filter for wireless LAN using Defected Ground Structure  

김형석 (중앙대 공대 전자전기공학과)
조영균 (중앙대 공대 전자전기공학과)
송희석 (전자부품연구원)
박규호 (전자부품연구원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.3, 2004 , pp. 182-186 More about this Journal
Abstract
In this paper, 2.4GHz WLAN BPF(Band Pass Filter) which has two DGS(Defected Ground Structure) unit cells was simulated and manufactured. To do this, a unit DGS resonator with resonant frequency is designed. Then the BPF for WLAN with the center frequency of 2.4GHz md the bandwidth of 200MHz is designed using two DGS resonator, finally this circuit is fabricated. We also proposed the equivalent circuit of the BPF employing two DGS resonator. The BPF with DGS was obtained experimental results with network analyzer Agilent 8510C. The measured result shows good agreement with simulated data. Experimental results show the center frequency of 2.45GHz, the insertion loss of 1.08dB, and the 3-dB bandwidth of 470MHz(19.5%). Acceding to the measured values, it is found that the fabricated DGS BPF is available for wireless LAN.
Keywords
DGS; BPF; WLAN;
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