Design of a Compact Monopole Antenna for UWB Applications

In this paper, a low cost, highly efficient and low profile monopole antenna for ultra-wideband (UWB) applications is presented. A new inverted triangular-shape structure possessing meander lines is designed to achieve a wide-band response and high efficiency. To design the proposed structure, three steps are utilized to achieve an UWB response. The bandwidth of the proposed antenna is improved with changing meander lines parameters, miniaturization of the ground width and optimization of the feeding line. The measured and simulated frequency band ranges from 3.2 to 12 GHz, while the radiation patterns are measured at 4, 5.3, 6 and 8 GHz frequency bands. The overall volume of the proposed antenna is 26 x 25 x 1.6 mm(3); whereas the FR4 material is used as a substrate with a relative permittivity and loss tangent of 4.3 and 0.025, correspondingly. The peak gain of 4 dB is achieved with a radiation efficiency of 80 to 98% for the entire wideband. Design modelling of proposed antenna is performed in ANSYS HFSS 13 software. A decent consistency between the simulated and measured results is accomplished which shows that the proposed antenna is a potential candidate for the UWB applications.

Automated summary

This paper presents a low-cost, highly efficient, and low-profile monopole antenna for ultra-wideband (UWB) applications. The antenna utilizes a new inverted triangular-shaped structure with meander lines to achieve wide-band response and high efficiency. By optimizing meander lines parameters, ground width, and feeding line, the antenna's bandwidth is improved. The measured and simulated frequency band ranges from 3.2 to 12 GHz, with a peak gain of 4 dB and radiation efficiency of 80 to 98%.