Design and Development of DRA based MIMO Antennas for Wireless Applications

Abstract

quotWireless connectivity is essential in modern communication, impacting technologies like RADAR, GPS, satellite communications, and mobile networks. It enhances consumer electronics and supports emerging fields such as autonomous vehicles, drones, and medical devices. WLAN, Bluetooth, and Wi-Fi enable seamless wireless connectivity for various applications. newline newlineAntennas are crucial for wireless systems, but traditional metallic antennas face challenges like reduced efficiency at high frequencies. Dielectric resonator antennas (DRAs) offer a promising alternative with high efficiency, wide bandwidth, and compact size. However, achieving multifunctionality with a single antenna is complex. Multiple-input multiple-output (MIMO) technology addresses this by using multiple antennas to enhance transmission capacity. newline newlineThis dissertation focuses on three key areas in DRA-based MIMO antennas: newline newline1. Multi-Terminal Antennas with High Isolation A novel method improves isolation without additional circuitry, achieving -26 dB isolation in a dual-port hemispherical-DRA (HDRA) MIMO antenna, later expanded to a four-terminal design. newline newline2. DRA Array-Based MIMO Antennas To enhance gain and data rates, array-based MIMO antennas were developed, including a dual-port HDRA array and a four-terminal rectangular-DRA (RDRA) array with a shared radiator. newline newline3. Multi-Band MIMO Antennas Bi-band and tri-band MIMO antennas were designed using microstrip-fed RDRA with PEC boundary conditions and metal vias to enable multi-band operation.quot newline newline