双频段滤波天线与低噪声放大器一体化设计OA北大核心CSTPCD

To meet the requirements of miniaturization,multi band,and low loss in future wireless communication systems,a new integrated design of dual-band filtering antenna and low noise amplifier(LNA),based on the ATF-551M4 transistor,was proposed for WiFi6 frequency band application.Better dual-band bandpass filtering performance was achieved by introducing parasitic structures on the antenna.Impedance matching was designed for LNA input in two operating frequency bands,and direct connection between the filtering antenna and the circuit was realized without impedance matching network.The design can effectively reduce the losses caused by impedance matching networks in traditional RF receiver front-end,improve receiver noise figure(NF),increase receiver sensitivity,and achieve miniaturization and multi-functional integration of the receiver.The measured results show that the integrated antenna has significant dual-band bandpass filtering characteristics in the WiFi6 frequency bands,with|S11|＜-13 dB,gain＞20.9 dB at low frequency band,and gain＞14.1 dB at high frequency band.Compared with traditional cascaded designs,the integrated antenna achieves not only miniaturization but also significantly lower NF in the operating frequency bands.The maximum reduction in NF is approximately 0.5 dB,corresponding to a sensitivity increase of about 17.5％.