Abstract
In this study a quintuple band rectangular dielectric resonator antenna (RDRA) with a small frequency ratio and small size of 30 mm × 30 mm × 9.813 mm is introduced. The proposed RDRA covers the frequency bands of WLAN (2.4/5.2 GHz), WiMAX (3.5 GHz) and 5G (4.1/4.8 GHz) exploiting TE 10 y , TE 211 x , TE 1δ1 y , TE 111 y , and TE 2δ1 y modes, respectively. A rectangular slot aperture is optimized to serve as a resonator with resonance mode TE 10 y as well as to couple the electric field from microstrip line to the DRA to excite TE 211 x mode. Furthermore, a new feeding approach employing three vertical metallic strip pairs (VMSPs) is proposed to excite further TE 1δ1 y , TE 111 y , and TE 2δ1 y modes in the RDRA. The VMSPs are configured on both sides of the dielectric resonator (DR) along the y - direction to act as vertical electric current sources. The lengths, width, and positions of the VMSPs are carefully determined in order to attain the desired modes. The four RDRA modes have broadside patterns while the slot resonator mode has a pattern like a dipole. Good agreement between both measured and simulated results of the reflection coefficient, radiation pattern, and the gain is achieved.
Highlights
With the development of the wireless communication during the last decades, the demand for the multiband antennas has increased [1]
To excite TE1x11 mode which will alter to the intended TE2x11 mode due to VMSPs effect as will be discussed later, the slot should be located near the maximum magnetic field in the rectangular dielectric resonator antenna (RDRA)
The four bands of the RDRA have broadside patterns, and the slot band has a pattern like a dipole
Summary
With the development of the wireless communication during the last decades, the demand for the multiband antennas has increased [1]. ANTENNA DESIGN Fig.1 shows the geometry of the prospective multiband rectangular DRA excited by the aperture coupling feed as well as three VMSPs. The feeding aperture is engraved as a rectangular slot with dimensions of (Lslot × Wslot ) on the top side in the ground plane.
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