Design of Quad-Band Antenna of 3.8 GHz range for Wi-Max Applications

A quad-band antenna mainly focused on four bands of frequency ranges like 1.5GHz, 2.7GHz, 3.8GHz, and 7.8GHz. The design of quad-band antenna is fabricated with the FR4 substrate material. Its dimensions are 24mmX35mm, and its thickness is 1.6mm. The E-shaped stub is to be inserted on the ground plane to get a better frequency response. In this paper, E shaped stub, and the backside of the stub was designed. Usage of Stubs can increase the bandwidth and improve efficiency, and can reduce the mutual coupling. In this regard, the antenna is resonating mainly at dual frequency ranges. Different types of quad-band antenna designs are most suitable for Wi-max and IoT applications. The main advantage of this IOT is miniaturization in size. Nowadays, Size miniaturization performs a significant role in different applications. Antennas with multi-band operations can be used for wireless and IoT applications. Finally, Return loss, VSWR, Radiation pattern, Gain, and Directivity parameters can be calculated by using HFSS software.