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reference antenna
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  参考天线
     The formula of calculating observation area is deduced, and the optimal length of base line is obtained on the basis of the formula and the requirement of reference antenna.
     结合上述公式以及对参考天线的要求可以得到最优的基线距离。
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  相似匹配句对
     for reference.
     供国内同行参考
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     REFERENCE
     每月参考
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     The result supplies reference for building large antenna array.
     研究结果为大阵列天线的研制奠定了基础。
短句来源
     Antenna Test
     天线测试
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     It also provides a reference to the signal process of smart antenna.
     本文研究结果可推广到医学成像领域,也可以作为移动通信中智能天线信号处理方式的一种参考。
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  reference antenna
In the 30 to 600 Mc range only those measurements can be considered reliable which have been obtained by comparing the results provided by the reference antenna and the reference field methods.
      
We consider detection of interference, spatial filtering techniques using projections, and discuss how a reference antenna pointed at the interferer can improve the performance.
      
Using a 4?GHz reference antenna, the variations of input impedance and radiation patterns are compared, for (a) changing the feed positions to the non-radiating edge against (b) changing the width of a normal fed patch antenna.
      
The remote antenna array was located 0.793 meters East of the reference antenna array.
      
The reference antenna is chosen as an isotropic radiator which radiates energy in all directions from a point source.
      
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The system of Electronic Scan Multibeam Constant Difference Amplitude Comparison(ESCDAC)direction measurement is widely applied in modern radar interception receivers.microwave switches fleetly switch on antennas one by one.The direction measurement is realized by comparing the signal amplitude of two borders upon antenna receiver channels.Firstly,based on the inception and procession of two borders upon antenna receiver channels and fulldirection reference antenna.The equation of ESCDAC is presented.Secondly,Based...

The system of Electronic Scan Multibeam Constant Difference Amplitude Comparison(ESCDAC)direction measurement is widely applied in modern radar interception receivers.microwave switches fleetly switch on antennas one by one.The direction measurement is realized by comparing the signal amplitude of two borders upon antenna receiver channels.Firstly,based on the inception and procession of two borders upon antenna receiver channels and fulldirection reference antenna.The equation of ESCDAC is presented.Secondly,Based on this equation and the independent characteristic of observation valves,the ESR of the azimuth measurement error is presented by full difference of the measurement equation which acts as the precision of ESCDAC.From this precision formula,the precision of ESCDAC is high and steady in different angles.

电扫描多波束恒差比幅测向体制在现代雷达截获接收机中有着广泛应用。他是由微波开关依次快速接通各个天线,通过比较相邻天线接收通道上信号幅度的大小来实现测向的。文章首先以任两个相邻天线和全向参考天线接收及信号处理过程,详细推导了电扫描恒差比幅测向方程。然后以该方程为基础,根据该方程中各个观测量相互独立的特点,方位测量误差的均方根值可由测向方程的全微分求得,并将其作为电扫描恒差比幅测向的精度,由该精度公式可以看出,电扫描恒差比幅测向有很高的精度,并且在不同的角度上,其精度保持稳定。

The monostaic passive location systems are actually bistatic radar systems.The direct wave and the ground clutters propagate at low altitudes with small grazing angle, and affects the coverage varies with the length of base line. In this paper, different lengths of base line affect on the coverage are analyzed considering the propagation at low altitudes. The formula of calculating observation area is deduced, and the optimal length of base line is obtained on the basis of the formula and the requirement of...

The monostaic passive location systems are actually bistatic radar systems.The direct wave and the ground clutters propagate at low altitudes with small grazing angle, and affects the coverage varies with the length of base line. In this paper, different lengths of base line affect on the coverage are analyzed considering the propagation at low altitudes. The formula of calculating observation area is deduced, and the optimal length of base line is obtained on the basis of the formula and the requirement of reference antenna. The results of the simulation show that the observation area increases with lower transmitter and receiver antennas.

基于调频广播的单站无源定位系统实际相当于收发分置的双基雷达,其直达波和地杂波的传播为小擦地角的低空传播,且影响威力范围的因素随基线长度的变化而有所不同。本文考虑低空传播,分析了不同基线长度时影响观测范围的主要因素,推导了对应情况下对高空飞行目标的观测面积的计算公式。结合上述公式以及对参考天线的要求可以得到最优的基线距离。仿真实验验证了上述的分析,并指出降低收发天线的高度可以进一步提高观测面积。

 
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