| Title |
A Compact and Wideband Bandpass Filter Using Microstrip Balanced CRLH Structure |
| Authors |
당두이닌(Duy Ninh Dang) ; 오녹덕(Ngoc Duc An) ; 남형석(Hyungseok Nam) ; 오인호(Inho Oh) ; 서철헌(Chulhun Seo) |
| DOI |
https://doi.org/10.5573/ieie.2020.57.1.36 |
| Keywords |
Band-pass filter ; cavity filter ; balanced CRLH structure ; microstrip gap ; shorted-stub ; |
| Abstract |
In this work, a compact and low-cost microstrip filter is designed for receiver module of X-band radar. The balanced composite right/left-handed (CRLH) structure is utilized to obtain high quality factor and wideband filter. The CRLH components' formulas are derived individually for band-pass filter. At X-band, the microstrip CRLH filter are required to substitute conventional lumped CRLH one. To guarantee the condition of balance, the microstrip gap and shorted-stub are used. The parasitic elements of these components are handled by full-wave simulator of ANSYS High Frequency Structure Simulator (HFSS). The results are achieved with 3dB bandwidth of 1400MHz, the maximum insertion loss in range of 9GHz-10GHz only 0.94dB, the high rejections are 48dB at 7GHz and 35dB at 12GHz and the dimension of 6mm×5mm×0.87mm that is a good candidate for cavity filter in the receiver. |