A Metamaterial Loaded High Gain Low Profile RHCP Microstrip Antenna for X-Band Applications
This paper presents the design of a right-hand circularly polarized (RHCP) microstrip antenna loaded with metamaterial to achieve high-gain performance. The metamaterial (MTM), a <inline-formula> <tex-math notation="LaTeX">$5 \times 5~$ </tex-math></inline-formula>...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10890955/ |
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| Summary: | This paper presents the design of a right-hand circularly polarized (RHCP) microstrip antenna loaded with metamaterial to achieve high-gain performance. The metamaterial (MTM), a <inline-formula> <tex-math notation="LaTeX">$5 \times 5~$ </tex-math></inline-formula> array of unit cells with a negative refractive index, is designed on one-sided FR4 dielectric material with dimensions <inline-formula> <tex-math notation="LaTeX">$0.79\lambda _{0} \times 0.79\lambda _{0} \times 0.023\lambda _{0}$ </tex-math></inline-formula>, where <inline-formula> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> is the free-space wavelength at 8.76 GHz. Both the antenna and the unit cells are designed on an FR4 substrate with a loss tangent of 0.02 and relative permittivity of 4.4. The antenna and MTM maintain the same area, with an air gap of 1 mm between them. The overall structure achieves a gain of 8.1 dBic at 9.5 GHz with stacking, compared to 4.4 dBic without the MTM stacking. The measured bandwidth of the proposed antenna is 1.98 GHz (8.76-10.74 GHz), which falls within the lower X-band, making it suitable for both military and maritime radar applications. |
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| ISSN: | 2169-3536 |