同轴微波/红外双模天线的光学设计  

Design of a coaxial microwave/ IR dual mode antenna

作　　者：陆强[1] 沈为民[1] 潘君骅[1] 孟洪福[2] 窦文斌[2] 

机构地区：[1]苏州大学现代光学技术研究所,江苏苏州215006 [2]东南大学毫米波国家重点实验室,江苏南京210096

出　　处：《红外与激光工程》2011年第11期2229-2232,共4页Infrared and Laser Engineering

基　　金：国家863计划(2007AA12Z103);江苏省高校自然科学研究计划(06KJA14003)

摘　　要：设计了一种新型同轴共孔径微波/红外双模天线,具有探测精度高、体积小、质量轻、成本低等特点,大大提高制导系统的精确定位能力,目标识别能力,全天后能力以及抗干扰能力。采用卡塞格林型式的折反系统,副镜上采用菲涅耳面分离微波和红外波段,在保证微波沿光轴传播的同时,使红外波段聚焦于视场中心,最终分别被微波和红外接收机接收。该双模天线系统的焦距为180mm,全视场角为1.5°,主镜的口径为150mm,中心视场处空间分辨率高于0.48mrad,满足实际使用要求。A new coaxial microwave/IR dual mode antenna with a common aperture was designed, which had the advantages of high detection accuracy, small size, light weight and low cost. It could greatly improve the ability of guidance system such as locating precisely, recognizing the target, working the whole day and anti-interfering. Moreover, it adopted catadioptric system of Cassegrain type. In order to separate microwave from infrared waveband, an Fresnel surface was grooved on its secondary mirror, which made the microwave transmit along the optical axis while the infrared light focusing on the center of field and both of this two wave being accepted respectively by microwave and infrared detectors. The effective focal length of the designed dual mode antenna is 180 ram, its full field of view angle is 1.5°, and its primary mirror aperture is 150 mm. The spatial resolution at its center field is higher than 0.48 mrad. Generally, it can meet the requirements of practical application.

关 键 词：微波/红外双模 同轴 共孔径 菲涅耳面 光学设计 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]