Resonant quadrifilar helix antenna is widely applied in satellite communication for its simple structure and satisfying gain in low elevation without requiring a ground plane.
介绍了一种用于卫星移动通信的新型谐振式四臂螺旋天线,谐振式四臂螺旋天线由于其结构简单、不需要参考地面、在低仰角处增益仍满足要求等特点在卫星通信中得到广泛的应用。
low-altitude dish
低辐射天线，低仰角天线
Improved Algorithm for Meter-wave Radars to Target at Low Altitude
一种改进的米波雷达低仰角处理算法
The Research on Finding Height Algorithm and Related Techniques for Meter Radar at Low-angle
米波雷达低仰角测高算法及相关技术研究
Modeling for Low Elevation Target Moving Along Fixed Airway Detected by Bistatic System
双站系统对监测低仰角固定航路目标的建模
An Algorithm Based on Differential Preprocessing of Low Elevation Estimation in VHF Radar
基于差分预处理的米波雷达低仰角处理算法
Application of Multipath Model of Low-angle Target in Elevation Estimation for Meter-wave Radar
米波雷达低仰角目标多路径模型在测角中的应用
A Coupling-Fed Circularly Polarised Microstrip Antenna With Wider Impedance Bandwidth And Higher Low-Elevation Gain
一种改进了阻抗带宽和低仰角增益的双频圆极化微带天线的设计
Fading Characteristics of HAPS Communication Channel in Dynamic Environment with Low Elevation Angle
低仰角动态环境下高空平台站通信信道的衰落特性
azimuth elevation indicator
方位角 仰角指示器
azimuth-elevation display
方位角-仰角显示器
azimuth and elevation output
方位角和仰角数据输出
altitude transmitting selsy
仰角自动同步传送机
elevation-position indicator
仰角位置雷达指示器
gun elevation order transmitter
射击仰角命令发送器
azimuth and elevation tracking unit
方位及仰角跟踪装置
elevation selsyn transformer
仰角自动同步机变压器
remote elevation selsyn
遥控仰角自动同步机
evation selsyn drive gear
仰角自动同步传动机构