Related Experiment Video
Updated: Feb 7, 2026
06:34
Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
6.4K
3D-Printed Low-Cost Dielectric-Resonator-Based Ultra-Broadband Microwave Absorber Using Carbon-Loaded Acrylonitrile
1Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China. renjianroy@gmail.com.
Materials (Basel, Switzerland)
|July 25, 2018
Summary
This study presents a low-cost, 3D-printed dielectric resonator absorber with over 90% microwave absorption across an ultra-broadband range (3.9-12 GHz). It demonstrates excellent performance across C and X bands and wide incident angles.
Area of Science:
- Electromagnetics
- Materials Science
- Additive Manufacturing
Background:
- Dielectric resonator (DR) structures are crucial for microwave absorption applications.
- Developing cost-effective and high-performance absorbers remains a key challenge.
- 3D printing offers a versatile platform for fabricating complex electromagnetic structures.
Purpose of the Study:
- To numerically and experimentally investigate an ultra-broadband dielectric-resonator-based absorber.
- To explore the potential of carbon-loaded Acrylonitrile Butadiene Styrene (ABS) polymer for microwave absorption.
- To evaluate the absorber's performance across a wide frequency range and various incident angles.
Main Methods:
- Fabrication of the absorber using 3D printing (fused deposition modeling) with carbon-loaded ABS polymer.
- Numerical simulations to analyze the working principle and absorption mechanisms (fundamental DR mode, higher order DR mode, grating mode).
- Experimental validation of the absorber's performance, including absorptivity and bandwidth.
Main Results:
- Achieved absorptivity higher than 90% over an ultra-broadband range from 3.9 to 12 GHz.
- Demonstrated a relative bandwidth exceeding 100%, covering the entire C-band (4-8 GHz) and X-band (8-12 GHz).
- Simulations confirmed high absorptivity at wide angles of incidence.
Conclusions:
- The developed 3D-printed dielectric resonator absorber offers a low-cost solution for ultra-broadband microwave absorption.
- The absorber exhibits promising performance characteristics, including wide operating bandwidth and wide-angle stability.
- Potential applications include microwave measurement, stealth technology, and energy harvesting.
Related Concept Videos
02:34Polymers
41.1K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
41.1K
02:34Polymers
23.3K
23.3K
02:52Resonance
65.7K
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
65.7K
01:18Capacitor With A Dielectric
5.0K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
5.0K
01:17Gauss's Law in Dielectrics
5.2K
Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
5.2K
01:14The Carbon Cycle
43.9K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.9K