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V-band (50-75GHz) applications such as 5G and myriad others are the catalyst for high performance near-field antenna measurement systems. For Spherical Near-Field (SNF), the traditional approaches at millimeter wave frequencies collect two full spheres of data in the near-field where each sphere samples one of two linear and orthogonal fields of the antenna under test (AUT).

Automotive antenna measurements are increasingly demanding. Modern cars are equipped with a large number of integrated antennas, spanning a wide frequency range for a large
number of applications. Integrated antennas are strongly coupled with the structure, final testing are thus performed on the vehicle to accurately determine the performance. The physical and

 The accurate characterization of low-gain antennas at VHF frequencies is challenging. Such antennas can be tested outdoors for convenience or in very large and thus expensive indoor Far-Field (FF) ranges. Indoor Near-Field (NF) systems are often considered a better cost compromise for such measurements, mainly due to the relaxed requirements on chamber size.

Comparison activities in which a number of measurement facilities compare their measurements of the same antenna in a standard configuration have become important for documentation and validation of laboratory expertise and competence. It is also mandatory to have regular participation in such activities to obtain and maintain accreditations like ISO 17025.

A novel method to miniaturize electromagnetic invisibility cloaks is introduced using Double Near Zero (DNZ) slabs, in which both the permittivity and permeability are close to zero. Based on the proposed technique, the phase pattern tailoring property of DNZ materials is utilized to miniaturize

Recent publications have reported on an innovative technique in which measured antennas are represented as numerical sources in the accurate computation of antennas in complex environments [1-5]. The measured antenna is accurately characterized as a Huygens box in a format compatible with different Computational Electro-Magnetic (CEM) solvers.

近来在计算电磁（CEM）工具中使用测量数据作为近场源，即使在天线特性和几何形状未知而不能将其纳入全波模型[1- 4]的情况下，也可以在数值模拟中代表天线。 近场源由天线的等效电流代表组成，通过来自测量辐射图的逆源方法[5-9]制备。 这个将数值模拟和天线测量结合在一起的链接已经通过一个活动的验证，这其中涉及了MVG和不同的软件（SW）供应商[10-15]。 在本文的第一部分，验证的最新结果完成了[1-3]中描述的活动。 在本文的第二部分，测量和模拟之间的关联应用于更复杂和/或现实的问题，包括散射问题。

通常，在近场到远场变换期间，准确的球面近场天线测量补偿了探测图案。 根据探头模态内容的复杂性和所需的精度，可以应用不同的探头校正（PC）技术。 通常的做法是在考虑到整个探测光谱的情况下，区分仅补偿探针的μ| = 1个球面模式的一阶PC和全PC。 应用PC时要考虑的另一个关键因素是探针表征。 为了获得非常准确的结果，通常的做法是在专门的测量活动中校准探头，不幸的是，它常常是耗时且昂贵的。 或者，可以使用模拟探头性能来执行PC。 本文介绍了使用校准或模拟探针进行的全序列和一阶PC之间的比较调查。

 In spherical Near Field (NF) measurements postprocessing techniques based on spatial filtering have been presented as promising tools for the mitigation of echoes or stray signals deriving from the surrounding environment. The spatial filtering is very efficient in measurement scenarios with a stationary Antenna Under Test (AUT).