Gain-Enhanced Metamaterial Absorber-Loaded Monopole Antenna for Reduced Radar Cross-Section and Back Radiation
Open Access
- 10 March 2020
- Vol. 13 (5), 1247
- https://doi.org/10.3390/ma13051247
Abstract
This paper proposes a gain-enhanced metamaterial (MM) absorber-loaded monopole antenna that reduces both radar cross-section and back radiation. To demonstrate the proposed idea, we designed a wire monopole antenna and an MM absorber. The MM absorber comprised lumped elements of subwavelength unit cells and achieved 90% absorbance bandwidth from 2.42–2.65 GHz. For low-profile configurations, the MM absorber was loaded parallel to and 10 mm from the monopole antenna, corresponding to 0.09 λ0 at 2.7 GHz. The monopole antenna resonated at 2.7 GHz with a 3.71 dBi peak gain and 2.65 GHz and 6.46 dBi peak gain, before and after loading the MM absorber, respectively. Therefore, including the MM absorber increased peak gain by 2.7 dB and reduced back radiation by 15 dB. The proposed antenna radar cross-section was reduced by 2 dB compared with a monopole antenna with an artificial magnetic conductor.Keywords
Funding Information
- National Research Foundation of Korea (2017R1A2B3003856)
This publication has 25 references indexed in Scilit:
- Microfluidically Polarization-Switchable Metasurfaced AntennaIEEE Antennas and Wireless Propagation Letters, 2018
- A Compact Microstrip Patch Antenna Based on Metamaterials for Wi-Fi and WiMAX ApplicationsJournal of electromagnetic engineering and science, 2018
- Analysis and Characterization of a Wide-Angle Impedance Matching Metasurface for Dipole Phased ArraysIEEE Transactions on Antennas and Propagation, 2015
- Gain Enhancement of 60-GHz Antipodal Tapered Slot Antenna Using Zero-Index MetamaterialIEEE Transactions on Antennas and Propagation, 2013
- Study of a Low-Profile 2.4-GHz Planar Dipole Antenna Using a High-Impedance Surface With 1-D Varactor TuningIEEE Transactions on Antennas and Propagation, 2012
- Metamaterial Electromagnetic Wave AbsorbersAdvanced Materials, 2012
- Subwavelength resolution with a negative-index metamaterial superlensApplied Physics Letters, 2007
- Active terahertz metamaterial devicesNature, 2006
- Artificial magnetic conductor surfaces and their application to low-profile high-gain planar antennasIEEE Transactions on Antennas and Propagation, 2005
- Planar artificial magnetic conductors and patch antennasIEEE Transactions on Antennas and Propagation, 2003