Printed Planar Antenna Designs Based on Metamaterial Unit- Cells for Broadband Wireless Communication Systems

Abstract

With the continuing development of mobile communications, the communication standards, which include operating frequencies and protocols, are also evolving. In order to accommodate these and future changes, antennas with characteristics of wideband and multiband are becoming a necessity. Hence, wireless communications industries are now demanding broadband antennas that are low-profile and low-volume structures.Conventional planar microstrip antennas are the most common form of printed antennas that have been used for many years. This is because these antennas offer advantages of low cost, conformability, and ease of manufacturing; however, the bandwidth of these types of antennas is highly restricted. Among different types of planar antennas, the slotted structure that offers the simplest structure is compact and radiates omnidirectionally; these features make it an excellent candidate for broadband applications.

High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

“…From [47], there are several distinct antenna types and shapes for RF receiver antenna. The most preferred type is the printed antennas especially printed planar patch antennas [48] due to their compact size, high versatility, and high flexibility in integrating with rectifier circuits [47]. Basic shapes such as rectangular, square, or circular are the fundamental shape for the planar patch antenna.…”

Design technique to mitigate unwanted coupling in densely packed radiating elements of an antenna array for electronic devices and wireless communication systems operating in the millimeter-wave band

“…In addition, each patch is loaded with a rhombus shaped slot with length and width of each side of 1.5 mm and 0.3 mm, respectively, that enlarges the effective aperture of the radiators. The slots in combination with the short-circuited lines created composite right/lefthanded or metamaterial structure as explained in [23].…”