Slot Antenna Tames Three Wireless Bands
Expanding wireless applications are creating unprecedented needs for equipment (such as antennas) at different frequency bands, as well as for different applications. Fortunately, a novel antenna was developed capable of handling three separate wireless bands within the same compact structure.
The antenna structure in question consists of two U-shaped slots in a rectangular patch and a Z-shaped strip at the ground plane. It can handle three distinct frequency bands centered at 2.45, 2.64, and 3.44 GHz for wireless communications applications. The two U-shaped slots support two of the frequency bands, while the Z-shaped strip is used for the other resonant frequency.
The antenna, which is printed on low-cost FR-4 substrate material with thickness of 0.8 mm and relative dielectric constant of 2.95, has overall dimensions of 34.5 × 40.0 mm. Simulation and measurement results show that the proposed antenna configuration can be applied to applications in wireless local area networks (WLANs), Fourth-Generation (4G) cellular equipment, and WiMAX devices with almost omnidirectional radiation patterns.
Full article by By Wang Maowen, Cao Jianzhong, and Peng Wenjuan, Microwaves and RF