提出一種新型光子帶隙(PBG)結(jié)構(gòu)微帶貼片天線。在同軸線饋電型微帶貼片天線的接地板上蝕刻出新穎PBG結(jié)構(gòu)，通過(guò)數(shù)值仿真得到有效提高增益的結(jié)構(gòu)。實(shí)際制作了PBG結(jié)構(gòu)微帶天線，并實(shí)測(cè)了天線特性參數(shù)。數(shù)值結(jié)果和實(shí)驗(yàn)結(jié)果進(jìn)行了比較，取得了較為一致的結(jié)果．實(shí)測(cè)天線增益達(dá)8．8dB，比無(wú)PBG時(shí)提高約3dB，驗(yàn)證了該P(yáng)BG結(jié)構(gòu)的有效性。
關(guān)鍵詞： 光子帶隙結(jié)構(gòu)，微帶天線，天線增益

Abstract： This paper proposes a new PBG structure for microstrip patch antenna．A new PBG structure is etched on the ground plane of a probe-fed microsmp patch antenna．An efective structure for enhancing the antenna gajn is obtained by simulations．Such a PBG structure microstrip patch an tenna is fabricated and measured．NumericM results ale compared with the measured ones，showing good agreement．The measured gain reaches 8．8dB，which is about 3．2dB larger than that without PBG，verifying the validity of the PBG structure．
Key words： Photonic band gap(PBG)structure，Microstrip antenna，Antenna gain