电子科技大学学报
電子科技大學學報
전자과기대학학보
JOURNAL OF UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
2014年
5期
696-699
,共4页
张振兴%赵青%宣银良%薄勇%何果
張振興%趙青%宣銀良%薄勇%何果
장진흥%조청%선은량%박용%하과
增益%喇叭天线%光子晶体%THz波
增益%喇叭天線%光子晶體%THz波
증익%나팔천선%광자정체%THz파
gain%horn antenna%photonic crystals%THz wave
在THz频段喇叭天线的口径面上加装金属面，金属面上环绕天线口径排布金属圆柱构成光子晶体，利用光子晶体带隙可以抑制表面波的特性，建立了THz光子晶体天线的物理模型。采用电磁仿真软件优化设计了一个新型的THz光子晶体天线，该天线工作频率为300 GHz，最大增益为17.6 dB。与传统的喇叭天线相比，其增益变大，主瓣变窄，背瓣减弱，方向性得到了较大的改进。
在THz頻段喇叭天線的口徑麵上加裝金屬麵，金屬麵上環繞天線口徑排佈金屬圓柱構成光子晶體，利用光子晶體帶隙可以抑製錶麵波的特性，建立瞭THz光子晶體天線的物理模型。採用電磁倣真軟件優化設計瞭一箇新型的THz光子晶體天線，該天線工作頻率為300 GHz，最大增益為17.6 dB。與傳統的喇叭天線相比，其增益變大，主瓣變窄，揹瓣減弱，方嚮性得到瞭較大的改進。
재THz빈단나팔천선적구경면상가장금속면，금속면상배요천선구경배포금속원주구성광자정체，이용광자정체대극가이억제표면파적특성，건립료THz광자정체천선적물리모형。채용전자방진연건우화설계료일개신형적THz광자정체천선，해천선공작빈솔위300 GHz，최대증익위17.6 dB。여전통적나팔천선상비，기증익변대，주판변착，배판감약，방향성득도료교대적개진。
A novel photonic-band-gap (PBG) horn antenna model is presented by using a metallic PBG structure which is formed by square arrays of metal posts. The lowest global band gap of the two-dimensional PBG structure is determined numerically and the gap is used to reflect and focus the antenna radiation. The horn antenna is designed by using the photonic crystals and simulated by using electromagnetic simulation software. The operating frequency of THz antenna is 300 GHz and the gain of THz antenna gain is 17.6 dB. Compared with the traditional antenna, the gain is increased, main lobe narrowed, antical lobe weakened, and the directivity improved.
