一种大功率平面螺旋天线的设计  

Design of a Planar Spiral Antenna with High-power

作　　者：徐风清[1] 王玉峰[1] 何志国[1] 崔景波[1] 

机构地区：[1]中国电子科技集团公司第三十六研究所,浙江嘉兴314033

出　　处：《通信对抗》2013年第4期31-34,共4页Communication Countermeasures

摘　　要：对一种大功率平面螺旋天线的形式的选取及设计方法进行了探讨。通过选取耐热性能较好的聚四氟乙烯基板作为螺旋线印制基板,加大平面螺旋天线馈电点间距及其传导散热面积,加宽天线辐射段的线宽,提升了天线的功率容量;通过合理设计天线螺旋角、腔体高度,提高了天线的增益;利用外锥式渐变线馈电实现了天线的平衡馈电及阻抗匹配。对背腔式平面螺旋天线各参数进行了综合优化设计,研制出了具有大功率、低剖面、宽频带、高增益等特点的平面螺旋天线实物样机。测量结果表明,研制出的天线在2:1的工作频带内可以承受200W功率,并且具有良好的阻抗和辐射特性。In this paper, an achieving method is discussed for high-power of planar spiral antenna, which includ- ing the choosing of antenna form and the design method. Several approaches are applied to increase the power en- durance, such as selecting PTFE substrate for circuit printing with well heat resistance, increasing the heat con- duction area of the feeding position, increasing the space between the feeding points, widening the spiral lines. The helix angle and cavity height are optimized for enhancing the antenna gain. The feeding method with tapered coaxial impedance convertor is used for feeding balance and impedance matching. Of parameters optimization, A back cavity spiral antenna is designed and manufactured with high-power, low-profile, wide bandwidth, high gain. The measured results show that, the antenna withstands 200W power and achieves a well impedance and ra- diation performance within a 2：1 working frequency bandwidth.

关 键 词：背腔平面螺旋天线 大功率 宽频带 低剖面 

分 类 号：TN823.31[电子电信—信息与通信工程]