Next Article in Journal
Testing of Automated Photochemical Reflectance Index Sensors as Proxy Measurements of Light Use Efficiency in an Aspen Forest
Previous Article in Journal
Low-Cost Graphite on Paper Pressure Sensor for a Robot Gripper with a Trivial Fabrication Process
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle

Enhancing the Number of Modes in Metasurfaced Reverberation Chambers for Field Uniformity Improvement

1
Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
2
CIMITEC, Departament d’Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
*
Authors to whom correspondence should be addressed.
Sensors 2018, 18(10), 3301; https://doi.org/10.3390/s18103301
Received: 11 July 2018 / Revised: 4 September 2018 / Accepted: 5 September 2018 / Published: 1 October 2018
(This article belongs to the Section Physical Sensors)
  |  
PDF [7615 KB, uploaded 1 October 2018]
  |  

Abstract

The use of metasurfaces to increase the number of modes, lower the operating frequency, and improve the field uniformity in reverberation chambers (RCs) is investigated in this paper. The method used to improve the field uniformity and decrease the resonance frequencies is based on increasing the number of modes by using the concept of subwavelength cavities. The resonance frequencies of a RC with metasurface wall are derived and expressed analytically in terms of macroscopic characteristics. Simulation of the reflection phase of the unit cell is then given as a guideline to choose the required microscopic parameters of the designed metasurface. The mode density in such subwavelength RCs is then obtained using a numerical eigenmode solver. Compared to traditional RCs, a much higher modal density is obtained at low frequencies. The standard deviation of the field uniformity in the test volume of the RC corresponding to different types of metasurface walls is finally compared. It is shown that by increasing the number of modes in the RC at the lower band, the operating frequency decreases and the field uniformity of the RC is improved. View Full-Text
Keywords: metasurface; reverberation chamber; modes; field uniformity metasurface; reverberation chamber; modes; field uniformity
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Sun, H.; Gu, C.; Li, Z.; Xu, Q.; Song, J.; Xu, B.; Dong, X.; Wang, K.; Martín, F. Enhancing the Number of Modes in Metasurfaced Reverberation Chambers for Field Uniformity Improvement. Sensors 2018, 18, 3301.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top