| Title |
Design of a Compact Bandstop Filter-combined UHF-band CRLH Bandpass Filter to Suppress the Spurious in L-band |
| Authors |
엄다정(Eom, Da-Jeong) ; 강승택(Kahng, Sung-Tek) ; 목세균(Mok, Se-Gyoon) ; 송충호(Song, Choong-Ho) ; 우춘식(Woo, Chun-Sik) ; 박도현(Park, Do-Hyun) |
| DOI |
https://doi.org/10.5370/KIEE.2012.61.1.104 |
| Keywords |
L-band communication ; CRLH bandpass filter ; Compact bandstop filter |
| Abstract |
In this paper, we propose a way to improve the quality of L-band wireless communication from unfriendly influential factors lying in the neighboring RF bands. The UHF-band system has resonator components and they generate harmonics as the spurious in the L-band. Therefore, a metamaterial CRLH bandpass filter is designed for the purpose of system miniaturization and smaller insertion loss, and its spurious phenomenon is observed in the frequency domain. And its harmonics in the L-band are suppressed by a compact bandstop filter whose equivalent circuit is newly developed. The design methodology is validated by the equivalent circuit to be compared with commercial full-wave EM software simulations, where the spurious is dropped by 20dB. Also, the advantage of the proposed design is presented by the comparison where our filter is much smaller than the conventional parallel edge coupled filter by over 50%, with excellent harmonic suppression. |