Challenges of RF Absorber Characterization: Comparison Between RCS- and NRL-Arch-Methods

Hofmann, Willi; Bornkessel, Christian; Schwind, Andreas; Hein, Matthias

doi:10.1109/emceurope.2019.8871983

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…This one port method offers limited dielectric measurements. Alternatively, the microwave characterization is possible by free standing MUT or material between two antennas [7], which as also similar to arch reflectivity method [8]. Although this method is well-suited for EM absorption or shielding materials, it is not accurate as waveguide or transmission line methods.…”

Section: Jinst 19 P06022mentioning

confidence: 99%

Microwave characterization of nanomaterials using planar slot resonator

Dhanasekaran,

Sumithra,

Kommuri

et al. 2024

J. Inst.

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Nanomaterial characterization using microwaves is needed in nanoscale semiconductor devices, microwave imaging, EM shielding, and wireless communication. Many nanomaterials are used as metallic or dielectric layers in these applications. In this paper, we report the characterization of nanomaterials using planar Microwave Slot Resonator (MSR) which was designed and studied using 3D EM simulation tool. The response of MSR is parameterized which offers a platform to calculate relative permittivity (ε r) and conductivity (σ) from measured high frequency response of nanomaterial loaded MSR. With simplified method, this microwave characterization offers accurate and faster results which be used in design, calculation and numerical analysis of nanomaterial based electronic/optoelectronic devices and sensor/shielding applications.

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Section: Jinst 19 P06022mentioning

confidence: 99%

Microwave characterization of nanomaterials using planar slot resonator

Dhanasekaran,

Sumithra,

Kommuri

et al. 2024

J. Inst.

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“…Alternatively, more accurate results can be obtained by using the NRL (Naval Research Laboratory) arch method in a MW anechoic chamber to simulate the free-space propagation properties of EMWs. [140,141]…”

Section: More Accurate Analysismentioning

confidence: 99%

Advancements in Microwave Absorption Motivated by Interdisciplinary Research

Zhao,

Qing,

Kong

et al. 2023

Advanced Materials

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Microwave absorption materials (MAMs) were originally developed for military purposes, but have since evolved into versatile materials with promising applications in modern technologies, including household use. Despite significant progress in bench‐side research over the past decade, MAMs remain limited in their scope and have yet to be widely adopted. This review explores the history of MAMs from first‐generation coatings to second‐generation functional absorbers, identifies bottlenecks hindering their maturation. It also presents potential solutions such as exploring broader spatial scales, advanced characterization, introducing liquid media, utilizing novel toolbox (machine learning), and proximity of lab to end‐user. Additionally, it meticulously presents compelling applications of MAMs in medicine, mechanics, energy, optics, and sensing, which go beyond absorption efficiency, along with their current development status and prospects. This interdisciplinary research direction differs from previous research which primarily focused on meeting traditional requirements (i. e., thin, lightweight, wide, and strong), and can be defined as the next generation of smart absorbers. Ultimately, the effective utilization of ubiquitous electromagnetic waves, aided by third‐generation MAMs, should be better aligned with future expectations.This article is protected by copyright. All rights reserved

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“…The most important types of anechoic chamber that are available in the commercial market is RF anechoic chamber. It is built using a shielded room, whose walls have been covered with a material that absorb so most of the incident energy, so that it can simulate a perfect free space, with the absence of signal reflection and scattering [4], [5]. The various types of microwave absorber shape mainly used in anechoic chamber such as pyramidal absorber, twisted pyramidal absorber, wedge absorber, multilayer dielectric absorber and hybrid absorber.…”

Section: Introductionmentioning

confidence: 99%

The Performance of Hollow Pyramidal Microwave Absorber Using Different Slot Size

Fazin

Abdullah@Idris

Asmadi

et al. 2023

SSP

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Microwave absorber is commonly used in defense, electromagnetic compatibility (EMC)/electromagnetic interference (EMI) reduction and anechoic chamber application. Conventional electromagnetic (EM) absorbers have some constraints in practical handling due to its heavy weight. In this paper, the research focuses on the development of high performance and lightweight microwave absorber. A lightweight and simple design configuration of different rectangular slot size array implemented on hollow pyramidal microwave absorber are carried out. There are two different designs of different slot size array calculated based on 3GHz, 6GHz and 9GHz frequency slot size. The two designs have an opposite slots size array arrangement namely different slot size 3GHz, 6GHz, 9GHz order design array and different slot size 9GHz, 6GHz, 3GHz order design array. The absorption is measured using the Naval Research Laboratory (NRL) arch free space method in the frequency range of 1GHz to 12GHz covering L, S, C and X band. In the measurement result, the maximum absorption performance is obtained by the different slot size 9GHz, 6GHz, 3GHz order design array which is up to -44.23dB at X-band. The measurement results for both designs array show good absorption performance which exhibit below than -20dB especially at high frequency band. The proposed designs have been identified as the new approach to increase absorption improvement over a broad frequency range application.

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Challenges of RF Absorber Characterization: Comparison Between RCS- and NRL-Arch-Methods

Cited by 12 publications

References 9 publications

Microwave characterization of nanomaterials using planar slot resonator

Microwave characterization of nanomaterials using planar slot resonator

Advancements in Microwave Absorption Motivated by Interdisciplinary Research

The Performance of Hollow Pyramidal Microwave Absorber Using Different Slot Size

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