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Double‐layer metasurface‐based low profile broadband X‐band microstrip antenna
- Source :
- IET Microwaves, Antennas & Propagation. 14:919-927
- Publication Year :
- 2020
- Publisher :
- Institution of Engineering and Technology (IET), 2020.
-
Abstract
- In this paper, a novel technology based on double-layer metasurfaces is proposed in order to broaden the bandwidth of microstrip antennas, which has been verified in X-band linearly polarised and circularly polarised antennas. Referring to the conventional metasurface antenna that employs slot-coupled feeding, these designs add an extra metasurface between the radiation patch and the ground plane so as to establish dual resonance modes, TM10 and TM20. Following the adoption of the composite right/left-handed transmission lines principle, this technique aims to adjust the propagation constant in the right-hand region by introducing parallel inductors and capacitors to widen the dual resonant frequencies' interval, thereby realising a broadband antenna. In addition, the interlayer metasurface may also be utilised as a director to balance the E-field of the radiation patch. A linearly polarised double-layer metasurface antenna with a size of 0.8 0.8 0.058 (wavelength in free space at the centre frequency) is filled with F4B substrate with a dielectric constant of 2.2. It finally realises an impedance matching bandwidth (VSWR 2) from 8.41 to 11.67 GHz, occupying about 32.47 of the centre frequency. This circularly polarised antenna attains both an impedance matching bandwidth of 32.44 (i.e. 8.29–11.5 GHz) and an axial-ratio bandwidth of 19.72 (i.e. 9.6–11.7 GHz).
- Subjects :
- Physics
business.industry
020208 electrical & electronic engineering
Bandwidth (signal processing)
Impedance matching
020206 networking & telecommunications
02 engineering and technology
Microstrip antenna
Optics
Transmission line
0202 electrical engineering, electronic engineering, information engineering
Standing wave ratio
Electrical and Electronic Engineering
Propagation constant
business
Ground plane
Metamaterial antenna
Subjects
Details
- ISSN :
- 17518733
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- IET Microwaves, Antennas & Propagation
- Accession number :
- edsair.doi...........33200fe3b82e9beffd66aa50473c0bc2