This paper presents a very compact, wideband, and enhanced-gain antenna for 5G applications. A simple single-layer millimeter wave (mm-wave) metamaterial lens (meta-lens) is used to improve the gain, ...aperture efficiency, and gain bandwidth of a slotted-patch antenna over a wide range of frequencies from 25 GHz to 31 GHz. The lens exhibits a metamaterial negative refractive index behavior, which is attributed to a substantial gain enhancement of around 4-5 dBi over the whole band compared to the gain values of the slotted patch antenna alone. The lens's unit cell comprises a simple single-layer split ring resonator (SRR) whose dimensions are carefully chosen to improve transmitted power and suppress absorbed and reflected power. The meta-lens consists of <inline-formula> <tex-math notation="LaTeX">8\times 8 </tex-math></inline-formula> subwavelength SRR unit cells. Each cell has an area of <inline-formula> <tex-math notation="LaTeX">1.6\times 1.6 </tex-math></inline-formula> mm2, it is located in the near-field region closely above a slotted patch antenna to produce a total antenna size of <inline-formula> <tex-math notation="LaTeX">12.8\times 12.8\times 7.27 </tex-math></inline-formula>mm3 (<inline-formula> <tex-math notation="LaTeX">1.2~\lambda \times 1.2~\lambda \times 0.68~\lambda </tex-math></inline-formula>, where <inline-formula> <tex-math notation="LaTeX">\lambda </tex-math></inline-formula> is the free space wavelength at 28 GHz). The maximum gain of the proposed antenna is 12.7 dBi, the 1 dB gain bandwidth is 18%, the maximum aperture efficiency is 92%, and the −10 dB impedance bandwidth (10 dB B.W.) is 17%. This excellent combination of essential metrics is hard to realize at mm-wave using narrowband antenna structures (microstrip patch antennas), and the aperture efficiency is the highest thus far for such a class of antennas.
Dual U-Slot Patch Antenna for 5G Applications Saleh, Chaker Mohsen; Almajali, Eqab; Alja'afreh, Saqer Saleh ...
2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI),
2021-Dec.-4
Conference Proceeding
A new dual U-slot single microstrip patch antenna for 5G applications is presented. The antenna slot parameters are optimized to obtain a return loss below 10dB from 26.8GHz to 30.4 GHz and a gain ...values ranges between 8.3dBi and 9.3dBi within the same frequency range. These figures are considerably improved as compared to other slotted single patch elements available in the literature hence, the proposed element can be potentially used to design MIMO antennas for 5G applications.
