ID 原文 译文
13364 最后,将设计的天线加载到CY2420通信节点上进行通信性能的测试，测试结果表明：加载了该宽带圆极化微带天线的节点在150 m处的平均丢包率为0.36%,且天线任意方向下的丢包率基本相同。 Finally, the designed antenna is loaded onto the CY2420 communication node for communication performance test. The test results show that the average packet loss rate at 150 m of the node is 0.36%, and it is almost the same in any direction.
13365 从测试结果可以看出该天线具有良好的圆极化特性和实用特性。 The test results show that the antenna has good circular polarization characteristics and is practical.
13366 天线的远场对于研究天线辐射特性具有重大意义,近场测量技术因其能够避免直接测量远场而得到广泛应用,该技术采用近远场变换获得远场,然而,检验该远场的准确性也是很重要的。 The far-field of antenna is very important for studying the radiation characteristics of antenna, and the near-field measurement techniques which can obtain far-field by near-field to far-field transformation are widely applied because the techniques can avoid direct measurement of far-field, however, it is also very important to exam the accuracy of the far-field.
13367 为了解决此类问题,文中以球面近场测量为例,提供了一种解决方案.该方案主要探讨了球面波模式展开理论,该理论是实现球面近远场变换算法的关键,其将待测天线在空间建立的场展开成球面波函数之和,天线的加权系数既包含了远场信息也包含了近场信息。 To solve this problem, the spherical near-field measurement is taken as an example in this paper, in which we propose a method that mainly discusses spherical wave mode expansion theory which is key to implementing the spherical near-field to far-field transformation. The theory can develop the field in the space which is built by the antenna expanding into the sum of spherical wave functions. The weighting coefficient of the antenna includes both the information of far-field and near-field.
13368 因此,不仅能够利用近场测量信息获得远场辐射特性,同样能够利用远场辐射特性反推得到近场处电场,这样就能检验由近远场变换算法得到的远场是否准确。 Therefore, not only the far-field radiation characteristics can be obtained from near-field measurement information, but also the electric field of near-field can be obtained from far-field measurement information, as a result, which can test the accuracy of far-filed obtained by near-far to far-field transformation.
13369 文中首先推算得到了近远场变换公式,随后进一步推算得到远近场变换的公式,最后将本文算法计算结果与FEKO测量结果进行比较,二者吻合良好,从而证实了本文两种算法的有效性。 The formula of near-field to far-field transformation is deduced, and then the far-field to near-field transformation formula is further deduced. The simulated result using the FEKO simulation software and calculated result obtained by the proposed algorithms are presented, and show very good agreement, which confirms the validation and efficiency of the algorithms.
13370 针对传统多层频率选择表面(frequency selective surface,FSS)的设计存在计算量大、耗时长等问题,提出了一种基于滤波器理论和FSS等效电路设计多层FSS的方法。 The conventional design of the multilayer frequency selective surface(FSS) has the problem such as large calculation and time consuming. In this paper, a design method for the multilayer FSS is proposed based on filter theory and the equivalent circuit of FSS.
13371 该方法先由滤波器理论综合得到多层FSS的等效电路,再利用FSS等效电路的反演方法将其电路模型转换成多层FSS的结构参数。 Firstly, the equivalent circuit of multilayer FSS is synthesized by the filter theory, and then the circuit model is converted into the structure parameters of FSS by utilizing of equivalent circuit inversion method for FSS.
13372 物理过程简单直观,可以实现任意层数的高阶FSS的快速精确设计。 It not only has the advantage of simple physical process, but also provides a rapid design process for precisely synthesizing the high order FSS with arbitrarily layers.
13373 为了验证该方法的准确性,完成了一种K波段带通型三阶FSS天线罩设计以及实物样件加工、测试。 In order to verify the accuracy of the proposed method, a K-band band-pass FSS radome with third-order is designed, and the radome prototype is fabricated and measured.