A Miniaturized Hairpin Resonator for the High Selectivity of WLAN Bandwidth

S. M. Kayser Azam, Muhammad I. Ibrahimy, S. M. A. Motakabber, A. K. M. Zakir Hossain, Md. Shazzadul Islam


In this article, a miniaturized hairpin resonator has been presented to introduce the high selectivity of Wireless Local Area Network (WLAN) bandwidth. In the construction of the hairpin resonator, short-circuited comb-lines are electrically coupled with the two longer edges of a rectangular-shaped loop. The hairpin resonator has been designed and fabricated with the Taconic TLX-8 substrate with a center-frequency at 2.45 GHz. The resonator exhibits a second order quasi-Chebyshev bandpass response. A low insertion loss has been found as -0.36 dB with a minimum return loss as -36.71 dB. The filtering dimension of this hairpin resonator occupies a small area of 166.82 mm2. This hairpin resonator is highly selective for the bandpass applications of the entire WLAN bandwidth.


Hairpin resonator, Microstrip, Bandpass filter, High Selectivity, WLAN.


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