CAJ | 학술논문

提出了一种新型应用于WLAN/WiMAX的对称T型开路支节加载的双模双通带滤波器，并对其进行了奇偶模分析，电场分布和电流分布分析。该滤波器的两个通带分别由奇模和偶模产生，且具有3个传输零点，带内插损分别为0.76 dB/1.13 dB，带内反射分别为-19.2 dB/-15.1 dB，在3.75~7.33 GHz内，其衰减达到-20 dB以下，具有高选择性和宽阻带的特性，且滤波器的实测结果与仿真结果非常吻合。该双模滤波器具有非常小的尺寸，大小为14.03 mm×31.48 mm，即0.15λg ×0.34λg，所以该双模滤波器在工程领域非常具有应用价值。
제출료일충신형응용우WLAN/WiMAX적대칭T형개로지절가재적쌍모쌍통대려파기，병대기진행료기우모분석，전장분포화전류분포분석。해려파기적량개통대분별유기모화우모산생，차구유3개전수영점，대내삽손분별위0.76 dB/1.13 dB，대내반사분별위-19.2 dB/-15.1 dB，재3.75~7.33 GHz내，기쇠감체도-20 dB이하，구유고선택성화관조대적특성，차려파기적실측결과여방진결과비상문합。해쌍모려파기구유비상소적척촌，대소위14.03 mm×31.48 mm，즉0.15λg ×0.34λg，소이해쌍모려파기재공정영역비상구유응용개치。
A novel dual-mode dual-band bandpass microstrip filter loaded with symmetric T-shape open-circuit subs and ap-plied to WLAN/WiMAX is proposed in this paper. The odd-and even-mode characteristics, electric field distribution and current distribution are analyzed. The two passbands of the filter are produced by the odd-mode resonant frequencies and the even-mode resonant frequencies respectively, which has three transmission zeros. The in-band insertion loss is 0.76 dB/1.13 dB and return loss is -19.2 dB/-15.1 dB respectively. The attenuation of upper-stopband is less than -20 dB in the range of 3.75~7.33 GHz. The filter has high selectivity and broad stopband. The measured results of the filter are coincide with the simulated results. The proposed filter has very small size which is 14.03 mm×31.48 mm, i.e., 0.15λg × 0.34λg. So the proposed dual-mode filter has im-portant application value in the engineering field.