Optimizing a CATR quiet zone using an array feed

Parini, C.G.; Dubrovka, R.; Gregson, Stuart

doi:10.1109/amtap.2016.7806288

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…These measurements are often based on certain probability levels (e.g., 90% or 95%) of PoD of bit streams or CDFs of measured signals, or communication throughput curves. Synthesized plane waves have also been studied before in the context of OTA measurements of MIMO antennas in multiprobe [9,10] or compact range setups [24,25]. While the uniformity of the field can also be described by the CDF of radiated power, it is not strictly required for OTA test chambers.…”

Section: Introductionmentioning

confidence: 99%

Characterization Method of an Automotive Random-Los Ota Measurement Setup

Razavi

Glazunov

Moghaddam

et al. 2018

PIER C

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Abstract-A novel characterization method of OTA test setups for wireless communication systems on vehicles in the random line-of-sight (Random-LOS) environment is proposed. The measurement setup assumes a compact range and a test zone where the antenna under test (AUT) on the vehicle would be located. An ideal receiver is assumed for the reference measurement, which allows to perform a system analysis through evaluating the Probability of Detection (PoD) as the system figure-of-merit. The proposed method is aimed as an aid for test equipment designers to design OTA compact ranges, compare their performances, and define an ideal numerical reference. The requirements for OTA measurement ranges are different from those for conventional anechoic compact ranges. A compact cylindrical reflector system with an antenna array line feed is characterized using the proposed method, from 1.6-2.7 GHz, for two orthogonal polarizations, various AUT heights and reflector tilting angles, with and without ground plane in a test zone which is 2 m wide in diameter.

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Section: Introductionmentioning

confidence: 99%

Characterization Method of an Automotive Random-Los Ota Measurement Setup

Razavi

Glazunov

Moghaddam

et al. 2018

PIER C

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“…Another choice is to design a feed that can produce a shaped beam pattern, such as conical cavity horn feed, 8 conical cavity horn feed with two rings, 9 and array feed. 10 However, the feeds in Wang 8 and Niu 9 are not designed for a single-offset parabolic reflector CATR, which almost cannot be used in practice. As for the array feed, which requires a complex feed network, it is not easy to implement.…”

Section: Introductionmentioning

confidence: 99%

“…However, the shaped subreflector requires a high cost of manufacture, which is strongly linked to the reflector diameter. Another choice is to design a feed that can produce a shaped beam pattern, such as conical cavity horn feed, 8 conical cavity horn feed with two rings, 9 and array feed 10 . However, the feeds in Wang 8 and Niu 9 are not designed for a single‐offset parabolic reflector CATR, which almost cannot be used in practice.…”

Section: Introductionmentioning

confidence: 99%

Verification of the shaped beam feed for high aperture usage efficiency single offset parabolic reflector compact antenna test range

Zhang

Yao

Chen

et al. 2022

Micro & Optical Tech Letters

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In this letter, to verify that the shaped beam feed can enhance the aperture usage efficiency of a single‐offset parabolic reflector compact antenna test range (CATR), a shaped beam horn is proposed. First, we obtain the radiation intensity function of the feed. Then, a coaxial cavity horn feed with a half‐ring is designed to shape the illumination that reaches the main reflector. Measured results demonstrate that, with no edge treatment, the quiet zone size can be up to 75% of the main reflector diameter under 1.20 dB amplitude variations and 12° phase variations at 102.40 GHz, and 70% aperture usage efficiency ranging from 102 to 103 GHz with phase variations less than 12° and amplitude variations less than 1.40 dB. The design verifies that the shaped beam feed can enhance the aperture usage efficiency of a single‐offset CATR.

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“…In [6] the authors presented results of a preliminary design study using an array of waveguide elements as the feed to optimally control the illumination of the CATR reflector. Two techniques were considered, reflector edge serrations and the alternative strategy of tapering the reflected field at the edge of the CATR aperture using a shaped beam such that the edges coincide with "ideally" a pattern null.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of the array approach is to maximize uniformity of illumination over some portion of the reflector whilst also providing the field intensity windowing needed to minimize edge diffraction effects thereby enabling greater aperture efficiency to be achieved for a given reflector size [1]. The work in [6] demonstrated a new efficient CATR computational electromagnetic simulation that enables a feed array (including mutual coupling effects) to encompass the design optimization loop.…”

Section: Introductionmentioning

confidence: 99%

Smooth-Walled Spline-Profile Horn Feed to Enlarge Compact Antenna Test Range Quiet Zone

Parini

Granet²,

Dubrovka

et al. 2018

12th European Conference on Antennas and Propagation (EuCAP 2018)

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We report the use of an Smooth-Walled Spline-Profile (SWSP) horn shaped beam feed with pattern optimized to achieve maximum compact antenna test range (CATR) quiet zone (QZ) size for a given reflector dimension, thereby minimising the cost of a new systems or increasing the capacity of existing facilities. We illustrate the concept with a sector-shaped, single offset reflector CATR by examining the impact that this has on the amplitude taper and the amplitude and phase peak-topeak ripple of the QZ. We demonstrate that a Smooth-Walled Spline-Profile horn feeding an un-serrated rim reflector can attain a useable QZ area exceeding 50 percent the size of the 350 wavelengths diameter main reflector. This represents an increase in QZ area of over 60 percent compared to a conventional corrugated horn feed. The Smooth-Walled Spline-Profile horn offers a QZ bandwidth of just 9 percent compared to the 23 percent of the corrugated horn but is considerably cheaper to manufacture.

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Optimizing a CATR quiet zone using an array feed

Cited by 7 publications

References 6 publications

Characterization Method of an Automotive Random-Los Ota Measurement Setup

Characterization Method of an Automotive Random-Los Ota Measurement Setup

Verification of the shaped beam feed for high aperture usage efficiency single offset parabolic reflector compact antenna test range

Smooth-Walled Spline-Profile Horn Feed to Enlarge Compact Antenna Test Range Quiet Zone

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