Experimental Comparison Between Source Stirring and Mechanical Stirring in a Reverberation Chamber by Analyzing the Antenna Transmission Coefficient

Reverberation chamber (RC) has been widely used in the over-the-air (OTA) testing. However, the conventional metal mechanical stirrer used in RC occupies a large space. As expecting to be at least λ=4 to the mechanical stirrer and boundary of the RC, the working volume is affected by the volume of the stirrer. To improve the working volume of the RC, we proposed an antenna array consist of 16 monopoles asymmetric distributed on a dielectric substrate as the mechanical stirrer, which works at 5G (WLAN) frequency band. The measurement results are compared to the metal mechanical stirrer, which show that the antenna array improves the working volume and stir efficiency significantly in RC.

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“…The stirring surface is calculated and illustrated in Figure 3B, and the theoretical limit of TSCS is

0.108 / 4 = 0.027 m^{2}

. The ratio of TSCS/theoretical limit is calculated as the stirring efficiency 15–17

Eff goodbreak= \frac{TSCS}{stirring surface \times \frac{true}{1}}

…”

Section: Measurement Setup and Resultsmentioning

confidence: 99%

Improving the working volume by a high‐efficiency antenna array in a reverberation chamber for 5G testing

Chen

Fang

et al. 2022

Int J RF Mic Comp-Aid Eng

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“…In the analytical model of this chamber, all loss mechanisms are taken into account in terms of an equivalent finite conductibility of the walls [21]. More details on the RC characterization, including quality factor, working frequencies, the well stirred conditions and the performances of the multiple monopole source stirring technique can be found in [24–26].…”

Section: Resultsmentioning

confidence: 99%

A general method for radiated emission prediction in a multiple monopole source stirred reverberation chamber

Leo

Cerri

Russo

et al. 2021

IET Science Measure & Tech

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This paper presents a general and quasi-analytical method aimed at reconstructing the electric field radiated by equipment under test (EUT), in free space through the knowledge of the values of the electric field sampled on the walls of a rectangular metallic enclosure. The algorithm is based on a set of equivalent magnetic and electric currents, regularly placed in a sub volume of the chamber, whose values are determined to reconstruct the electric field due to the EUT on the samples. Results show that the method is general because it can be applied to a wide set of EUTs, but it is also flexible because it is able to exploit some a priori knowledge of the source to improve its accuracy and efficiency.

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“…Recently, optimized stirrers have been designed to improve the stirring performance [12]. Meanwhile, the source-stir technique has been applied to improve testing efficiency [13][14][15][16][17][18][19][20][21]. The multi-probe system, one of the stir techniques, is generally used in the RC [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Reducing the Measurement Time in a Reverberation Chamber to Less than 1 Second

Xia

Fang

et al. 2023

ACES Journal

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To increase the speed of the measurement, a time-efficient multi-probe system in a reverberation chamber (RC) is validated. The system consists of 4 printed circuit board (PCB) switches integrating with 128 probe antennas. By using solid-state switches, all antennas can be switched over in sequence in less than 1 second. Typical characteristics of the RC and the total radiated power (TRP) of the device under test (DUT) are performed to verify the validity of this configuration. Compared with the RC using mechanical stirrers, this system shows its superiority in terms of testing efficiency.

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Experimental Comparison Between Source Stirring and Mechanical Stirring in a Reverberation Chamber by Analyzing the Antenna Transmission Coefficient

Cited by 18 publications

References 12 publications

Improving the working volume by a high‐efficiency antenna array in a reverberation chamber for 5G testing

Improving the working volume by a high‐efficiency antenna array in a reverberation chamber for 5G testing

A general method for radiated emission prediction in a multiple monopole source stirred reverberation chamber

Reducing the Measurement Time in a Reverberation Chamber to Less than 1 Second

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