NDLI: Design of miniaturised frequency selective rasorber using parallel LC resonators

Content Provider	IET Digital Library
Author	Jiang, Wen Zhang, Kunzhe Zhao, Bo Su, Yao Gong, Shuxi
Abstract	This study describes a method for designing miniaturised frequency selective rasorbers (FSRs) with a transmission band located between two adjacent absorption bands. The proposed FSR composes of a bandpass frequency selective surface at the bottom and an absorptive surface (APS) with lumped resistors and parallel LC resonators printed on the top. The absorptive surface is a 2.5-dimensional geometry for the purpose of miniaturisation. The mounted parallel LC resonators mounted in the APS are utilised to implement the transmission characteristics of the proposed FSR while the constructed lumped resistors in the APS are used to realise the absorption performance. A prototype is fabricated and measured in an anechoic chamber under the guidance of a free-space measurement system to verify this method. Experiments show that the proposed FSR has a transmission band at the centre frequency of 7.24 GHz and over the bands from 4.85 to 6.82 GHz and from 8.05 to 9.36 GHz, both reflection and transmission coefficients are less than −10 dB. The performances of the proposed FSR with different incident angles and polarisations are also investigated and results show that it is insensitive to electromagnetic wave polarisations and has a stable performance when the incident angles up to 45°.
Starting Page	554
Ending Page	558
Page Count	5
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 5, Apr (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5337
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2019-03-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2.5-dimensional Geometry Absorption Performance Absorptive Surface Adjacent Absorption Band Anechoic Chamber Anechoic Chambers (electromagnetic) Band-pass Filter Bandpass Frequency Selective Surface Centre Frequency Constructed Lumped Resistors Electromagnetic Compatibility Electromagnetic Wave Absorption Electromagnetic Wave Polarisation Electromagnetic Wave Polarisations Free-Space Measurement System Frequency 4.85 GHz to 6.82 GHz Frequency 7.24 GHz Frequency 8.05 GHz to 9.36 GHz Frequency Selective Surface FSR Incident Angles Instrumentation And Measurement System Interference Measurement System Microwave Filter Microwave Material Microwave Resonator Miniaturised Frequency Selective Absorber Design Mounted Parallel LC Resonator Passive Filter Passive Network Reflection Coefficient Resonator Filter Transmission Band Transmission Characteristic Transmission Coefficient Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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