Abstract
In this work, a new coplanar-waveguide (CPW)-fed monopole antenna with dual-band operation is proposed. The antenna is composed of a meandered monopole, an extended conductor line, and asymmetrical ground planes. Tuning geometrical structure of the ground plane of the CPW feeding structure excites additional resonant frequency bands, and thus enhances the impedance bandwidth. The measured impedance bandwidths, which is defined by −6 dB reflection coefficient, are 186 MHz (863 – 1049 MHz, 19.4%) at the lower resonant mode and 1320 MHz (1490 – 2810 MHz, 61.3%) at the upper mode. It can be observed that the impedance bandwidth of the proposed antenna covers the operated bandwidths of the commercial wireless communication systems, such as GSM 900, DCS, IMT-2000, UMTS, WLAN, LTE 2300, and LTE 2500.
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