Miniaturised microstrip dual-band bandpass filter using novel symmetric double-spiral resonators for WLAN application

作者：Wu, Guo-cheng^*; Wang, Guangming; Liang, Jiang Gang; Gao, Xiang-jun; Zhu, Li

来源：Electronics Letters, 2015, 51(15): 1177-1178.

DOI：10.1049/el.2015.1690

A miniaturised dual-band bandpass filter (DB-BPF) centred at 2.45/5.70 GHz using novel symmetric double-spiral resonators is proposed. The measured and simulated results of the proposed DB-BPF are in good agreement with each other except for a slight frequency shift downwards in the measurement. According to the measurements, the measured 3 dB bandwidths are 6.53% (2.35-2.51 GHz) at 2.45 GHz and 4.2% (5.61-5.85 GHz) at 5.70 GHz; the insertion losses including the loss from SMA connectors are <0.8/1.2 dB and the isolation between these two passbands is better than 20 dB from 2.54 to 5.59 GHz. The circuit area of the fabricated prototype is very compact, being only 7.7 x 9.4 mm.

• 出版日期2015-7-23
• 单位中国人民解放军空军工程大学