Publication: High efficiency air substrate microstrip antennas for millimeter wave applications
| datacite.subject.fos | oecd::Engineering and technology::Electrical engineering, Electronic engineering, Information engineering | |
| dc.contributor.author | Shahed, Kamal Shahanawaz | |
| dc.date.accessioned | 2024-02-06T08:31:08Z | |
| dc.date.available | 2024-02-06T08:31:08Z | |
| dc.date.issued | 2022-06-01 | |
| dc.description.abstract | The microstrip antenna is gaining popularity because to its simple production process, mechanical robustness, and ease of integration into a system's surface. Initial research demonstrated that a reduction in the antenna’s extent outcomes in a straightforward reduction in its efficiency and bandwidth. Suspending dielectric substrates between air, on the other hand, proved essential in achieving wide bandwidth and high efficiency, but at the expense of increased manufacturing costs. Furthermore, the thickness of the metal radiator/ ground and the height of the substrate of a microstrip antenna are normally determined by the manufacturer's specifications and cannot be altered by the designer. As a result, employing the air as a substrate allows the designer to adjust the thickness of the sheet metal/ substrate to achieve the desired antenna properties. This research aimed to design, investigate, and validate the influence of the air substrate-based sheet metal microstrip on various antenna parameters for the millimeter wave applications. Novel antenna structures were ascertained by performing parametric simulation studies on the thickness of the sheet metal/ substrate and the design of radiator with the Computer Simulation Technology Microwave Studio ® software. The simulated antenna designs were validated by manufacturing and evaluating their performance in the anechoic chamber. Significantly, for operating in the 24 GHz frequency band, a simple wheel-shaped copper microstrip antenna is described. The vertical polarization was generated using a coaxial feed probe, while the horizontal polarization was generated using a wheel-shaped microstrip with four coupling arms. An antenna made of two copper sheets placed together between two air substrates was built and tested in the anechoic chamber. The field vectors from the feed probe and the radiating arms were properly combined, resulting in stable in-band omnidirectional radiation patterns. The antenna had an overall footprint of 8 mm, which allowed it to achieve a −10 dB impedance bandwidth > 3 GHz and a radiation efficiency of >95%. The axial ratio < 2.7 dB and the gain < 6 dBi were maintained in the operational frequency band of 22.5 to 25.7 GHz. Furthermore, the antenna system's fabrication cost was greatly decreased due to the integration of simple geometry and an air-substrate. As a result, the antenna is a strong contender for the millimeter wave applications in the fifth generation. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/18304 | |
| dc.language.iso | en | |
| dc.title | High efficiency air substrate microstrip antennas for millimeter wave applications | |
| dc.type | Resource Types::text::thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |