Xu, Qian
(2015)
Anechoic and reverberation chamber design and measurements.
PhD thesis, University of Liverpool.
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Abstract
Two different chambers are studied in this thesis: the anechoic chamber (AC) and the reverberation chamber (RC). The AC has been developed for many years, while in the past few years RC has emerged as a promising facility not just in electromagnetic compatibility (EMC) measurements but also as a multi-disciplinary research facility in various areas. For the anechoic chamber, a CAD tool is developed to aid the design of an anechoic chamber. The objective is to estimate the chamber performance accurately. The ultimate goal is to minimise the cost but optimise the chamber performance for given conditions and specifications. This is very important for a commercial company. The CAD tool is developed based on the GO theory, two different algorithms are realised, acceleration techniques are applied, and measurements are performed to validate the CAD tool. For the reverberation chamber, a series of new measurement methods in the RC are developed including antenna radiation efficiency measurement, diversity gain measurement, radiated emission measurement, material characterisation, shielding effectiveness, volume measurement, etc. Finally, we apply the B-scan in an RC to characterise the behaviour of the electric field in the time domain. Statistical characterisation of the electric field in the time domain is given, stirrer efficiency is quantified based on the total scattering cross section (TSCS) of stirrers, and time gating technique in the RC is introduced. It has been found that the stirrer efficiency can be well-quantified in the time domain and the definition of stirrer efficiency in this thesis provides a universal and quantitative way to compare the performance between different RCs or different stirrer designs in one RC.
| Item Type: | Thesis (PhD) |
|---|---|
| Additional Information: | Date: 2015-09 (completed) |
| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 01 Sep 2016 14:14 |
| Last Modified: | 17 Dec 2022 02:10 |
| DOI: | 10.17638/02050739 |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/2050739 |
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