Compact range techniques and measurements

Characterization Method of an Automotive Random-Los Ota Measurement Setup

“…In these scenarios the radiation pattern is often required with an accuracy of a tenth of dB or less, and the test setup's figure of merit is typically the ratio between the energy in the error field and the ideal plane wave [16,17]. The plane wave can be synthesized by a number of different methods, e.g., using a reflector in a compact range [18], determining a continuous aperture current source by iterative methods and then discretizing the current distribution for a number of probes [19,20] or direct calculation of the excitation weights for regular [21,22] and sparse [23] arrays.…”

“…Furthermore, more realistic bowtie antenna elements (optimized for 1.6-2.7 GHz) are assumed for the array feed [28,29], as opposed to those assumed in [27,30]. The measurement setup is therefore smaller in size, of lighter weight and thus easier to tilt than conventional compact ranges [18]. Other alternative automotive OTA measurement techniques employing anechoic chambers propose the use of multiprobe antenna systems [31], but will not be considered in the present characterization study.…”

Analysis and Measurements of Three-Dimensional Arbitrarily-Shaped Dielectric Scatterers.

“…The compact range technique was first implemented in X and Ku bands [29], and was recently extended to 30 GHz [301. At frequencies below 2 GHz, a number of technical difficulties have long been generally recognized.…”

Design and Test of a 0.3 THZ Compact Antenna Test Range

“…However, when we focus on the research of target detection technology, the most difficult point is how to describe the large objects' electromagnetic radiation and the scattering characteristics in THz band. Limited by the small size of microwave anechoic chamber, it cannot always meet the far-field distance R ≥ 2D 2 /λ (where D is the diameter of the antenna, λ the antenna operating wavelength, and R the minimum distance of antenna test) of the large target's electromagnetic radiation and scattering properties [5,6]. On the other hand, the electromagnetic environment has a great influence on the characteristics of millimeter wave and terahertz wave, so the features cannot be directly tested by the external field, and the testing conditions could be even harsher.…”