In this paper, a compact UWB (ultra‐wideband) antenna with three C‐shaped slots for notched band characteristics is presented. The proposed antenna covers a bandwidth between 2.95 GHz and 12 GHz. Three different sizes of C‐shaped slot are integrated in the radiating element to remove three frequency bands at WiMAX (3.2‐3.8 GHz), C‐band (3.7‐4.2 GHz), and WLAN (5.15‐5.85 GHz). The antenna has a compact size (30 × 30 mm2). The simulated results show good and acceptable agreement with measurement results in terms of S‐parameters and radiation patterns.

Abstract-In this letter, a new coplanar waveguide (CPW)-fed monopole antenna with equilateraltriangular shape is presented and experimentally investigated. The structure under study generates three different center frequencies corresponding to the lower, middle, and upper bands for Wireless Local Area Networks (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. The proposed antenna is analyzed using the Computer Simulation Technology (CST) Software. To validate the simulation results, an experimental prototype of the proposed design is fabricated, tested and measured. The experimental results show a good agreement with the simulated ones.

In this study, a coplanar waveguide‐fed reconfigurable antenna using crescent‐shaped fractal geometry is presented. The frequency reconfigurable approach is obtained using radio‐frequency positive intrinsic negative diodes, resistor, and inductors. The proposed approach has successfully allowed reconfigurable switching up to eight frequency bands between 1.46 and 6.15 GHz. Good results have been obtained in terms of stable and omnidirectional radiation patterns. The realised gains of the antenna system, in these frequency bands, vary from 0.52 to 5.67 dBi. The designed antenna has the advantages of a multiband structure and compact size over the previously reported structures. The proposed antenna is suitable for future wireless application systems.

In this letter, we present a compact dual‐band dielectric resonator antenna for multi‐input multi‐output antenna is designed and fabricated. The proposed antenna consists of a single cylindrical dielectric resonator antenna (CDRA) excited from two orthogonal ports. The electromagnetic analysis is performed using the CST microwave studio software. To validate the proposed concept, experimental measurements are also performed. The measured results show that the CDRA provides two bands around 1.9 and 2.7 GHz, suitable for LTE applications. Moreover, the proposed design allows a very good isolation between the two ports and a low envelop correlation coefficient. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2388–2391, 2015