摘要
天线远场测量方法广泛应用于卫星通信天线的性能测量,不同频段的测量会用到不同频段的标准喇叭天线,从而涉及到快速更换标准喇叭天线的问题。介绍了一种标准喇叭天线的转台结构,具有方位、俯仰、极化三轴调整能力,且易于快速更换,详细介绍了蜗轮蜗杆的结构组成、传动方式、参数设计。通过重量估算、传动效率和力矩计算,可知操作者可轻松转动方位、俯仰和极化组件系统。转台选用蜗轮蜗杆传动方式,具有传动比大,传动平稳,结构紧凑,无噪音,可自锁,测试过程中可查看旋转角度等特点。该标准喇叭天线转台可满足天线增益、天线方向图、G/T值、轴比等多种性能测试需求,验证天线的指标性能;针对天线不同频段的性能测试,1分钟内即可快速更换标准喇叭天线,并在实践中得到应用,为卫星通信天线性能指标的验证提供了便捷、高效的测量解决方案。
The antenna far-field measurement is widely used in the performance measurement of satellite communication antenna. The standard horn antenna of different frequency band will be used in the measurement of different frequency band, which involves the problem of replacing the standard horn antenna quickly. The paper introduces the rotary table structure of a standard horn antenna, which has the ability to adjust the azimuth, elevation and polarization axis, and is easy to replace quickly, and the structure composition, transmission mode and parameter design of worm gear and worm are introduced in detail.By weight estimation, transmission efficiency, and torque calculations, the operator can easily rotate the azimuth, pitch, and polarization component systems. The rotary table adopts worm gear transmission mode, with large transmission ratio, smooth transmission, compact structure, no noise, self-locking. The test process can check the rotation Angle and other characteristics. The standard horn antenna’s rotary table can meet the antenna gain, Antenna direction map, G/T value, shaft ratio and other performance test requirement to verify the indicator performance of the antenna.For the performance test of different frequency bands of the antenna, the standard horn antenna can be quickly replaced within 1 minute, and applied in practice, providing a convenient and efficient measurement solution for the verification of satellite communication antenna performance index.
作者
李玉龙
LI Yulong(Xi'an Clarke Communication Technology Co.,Ltd.,Xi’an 710100,China)
出处
《空间电子技术》
2022年第5期73-77,共5页
Space Electronic Technology
关键词
天线
蜗轮蜗杆
结构设计
antenna
worm gear and worm
structural design
