Design of antenna array and data streaming platform for low-cost smart antenna systems

Tan, Moh Chuan (2021) Design of antenna array and data streaming platform for low-cost smart antenna systems. PhD thesis, University of Glasgow.

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Abstract

The wide range of wireless infrastructures such as cellular base stations, wireless hotspots, roadside infrastructures, and wireless mobile infrastructures have been increasing rapidly over the past decades. In the transportation sector, wireless technology refreshes require constantly introducing newer wireless standards into the existing wireless infrastructure. Different wireless standards are expected to co-exist, and the air space congestion worsens if the wireless devices are operating in different wireless standards, where collision avoidance and transmission time synchronisation become complex and almost impossible. Huge challenges are expected such as operation constraints, cross-system interference, and air space congestion. Future proof and scalable smart wireless infrastructures are crucial to harmonise the un-coordinated wireless infrastructures and improve the performance, reliability, and availably of the wireless networks. This thesis presents the detailed design of a novel pre-configurable smart antenna system and its sub-system including antenna element, antenna array, and radio frequency (RF) frontend. Three types of 90° beamforming antenna array (with low, middle and high gain) were designed, simulated, and experimentally evaluated. The RF frontend module or transmit and receive (T/R) module was designed and fabricated. The performance of the T/R module was characterised and calibrated using the recursive calibration method, and drastic sidelobe level (SLL) improvement was achieved using the amplitude distribution technique. Finally, the antenna arrays and T/R modules are integrated into the pre-configurable smart antenna system, the beam steering performance is experimentally evaluated and presented in this thesis.

With the combination of practical know-how and theoretical estimation, the thesis highlights how the modern smart antenna techniques that support most cutting-edge wireless technology can be adopted into the existing infrastructure with minimum distraction to the existing systems. This is in line with the global Smart City initiative, where a huge number of Internet of Things (IoT) devices being wired, or wireless are expected to work harmoniously in the same premises. The concept of the pre-configurable smart antenna system presented in this thesis is set to deliver a future-proof and highly scalable and sustainable infrastructure in the transportation market.

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Keywords: Smart Antenna, beamforming, antenna array, T/R module, pre-configurable.
Subjects: T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Colleges/Schools: College of Science and Engineering > School of Engineering
Supervisor's Name: Li, Dr. Minghui and Abbasi, Dr. Qammer H. and Imran, Professor Muhammad Ali
Date of Award: 2021
Depositing User: Mr. Moh Chuan Tan
Unique ID: glathesis:2021-82055
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 11 Mar 2021 18:17
Last Modified: 11 Mar 2021 18:31
Thesis DOI: 10.5525/gla.thesis.82055
URI: http://theses.gla.ac.uk/id/eprint/82055
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