Bandwidth improvement of a zeroth-order resonant antenna for WiMax applications

Abstract

A new multiband coplanar waveguide fed zeroth‐order resonant (ZOR) antenna structure with improved bandwidth is proposed. This antenna achieves multiband functionality in five different frequency bands in the range of 2.5–5 GHz. The ZOR frequency is observed to be at 3.97 GHz. The bandwidth improvement, gain, and antenna efficiency at this frequency is found to be 3.28%, 1.9769 dB, and 73.42%, respectively. The proposed antenna is measured at antenna measurement facility, and results were compared with the simulated results. A good agreement between the measured and the simulated results validates the proposed design. The designed antenna proposed in this article holds potential applications in modern wireless communication systems which require multiband antennas with good radiation characteristics. © 2012 Wiley Periodicals, Inc. Int J RF and Microwave CAE 22:569–574, 2012.

Design and development of resonant loop antenna for mock‐up ion cyclotron resonance frequency system of tokamak

“…In case of open boundary, the infinite wavelength frequency is determined by the shunt resonance frequency w sh . The resonance frequency and propagation constant of the open end, inductor loaded unit cell are given by [24,25],…”

“…The antenna has been analysed using an equivalent circuit model. The circuit model pertains a unit cell of composite right/left-handed transmission line (CRLH-TL) [19][20][21][22][23][24][25], where parallel and series LC network elements decide the resonance frequency and impedance of the antenna, respectively. A CRLH-TL-based prototype resonant loop antenna has been designed at 182.5 MHz for 2 kW power handling capability.…”