Capstone Project

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Group 2022-02 Status completed
Title Design of a Novel mm-Wave Dual-Polarized Antenna for 5G Base-Station Applications
Supervisor A. Kishk and John Xiupu Zhang
Description The devices and connections to the 5G technology increase rapidly. The incoming new wireless applications and the high demand for higher data rates and lower latency time, make the 5G technology a significant field of research. The proposed project contributes to the 5G base-station applications. The new Radio-Over-Fiber (RoF) base station scheme is proposed to have the antenna directly connected to a high-power photodiode. Electrical amplifiers and phase shifters are not required for the future base-stations, since amplification and phase shifting are achieved in the optical domain. The proposed project is to design a new compact dual-polarized mm-wave filtering antenna in the FR2 band. The antenna uses slot radiators for compactness and bandwidth. A packaged transmission line is used to feed a bowtie slot through a fork-shaped line, which is used to enhance the input impedance matching. For two simultaneously orthogonal linear polarizations, two orthogonal slots with two feeding ports are used. The required bandwidth of operation should be 20%. The single element antenna will be extended to an antenna array. A lens for the antenna array is to be designed to enhance the radiation gain. In addition, an electrical amplifier with a matching network is to be designed to enhance the radiation power, so that the antenna can be used for the base-station applications. The electrical amplifier is required because the maximum output power from the available commercial photodiodes is not sufficient for base-station applications. The proposed antenna is to be connected to a photodiode through a matching network to the electrical amplifier and the antenna, so that a photonic integrated antenna is achieved. The optical phase shifting is to be investigated and used in this project. The proposed single-element and array antenna will be fabricated to measure the S-parameters, the radiation efficiency, the antenna gain and the realized gain.
Requirement 1. ELEC 251. 2. ELEC 351. 3. CST Software.
Tools 1. CST Software. 2. Vector Network Analyzer. 3. Antenna Chamber. 4. High-power photodiodes. 5. Antenna Fabrication.
Number of Students 5
Students P. Boucher, Z. Wu, S. Tan, R. Mugisho, D. Charron
Comments: Please contact Saeed Haydhah if you are interested in this project. saeed.haydhah@concordia.ca
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