Penta-band antenna for global system for mobile communications/digital cellular system/personal communications service/ universal mobile telecommunications system/ wireless local area network operation in portable devices

Abstract

This study presents a planar inverted-F antenna for penta-band operation in portable devices, in accordance with the following wireless communication standards: Global system for mobile communications, digital cellular system, personal communications service, universal mobile telecommunications system, and wireless local area network. The proposed antenna consists of a folded planar radiator with two slots - a J-shaped and a rectangular one - suspended above a substrate partially covered with a ground plane, to which a printed radiating strip is connected. Multiple resonances excited in this structure generate the radiation bands of the antenna, covering all required frequency ranges. A parametric analysis is conducted with the aid of electromagnetic simulation in order to evaluate the influence of geometrical dimensions of the antenna on its performance. The fabricated antenna prototype exhibits overall dimensions of 45 mm × 90 mm × 6.6 mm, and the experimental 10 dB return-loss bands of the antenna are 869-966, 1653-2200, and 2390-2505 MHz, with a measured linearly polarised gain of 2.2 dB at 915 MHz, 2.0 dB at 1900 MHz, and 1.0 dB at 2450 MHz, on the principal cut planes. A good agreement is observed between simulated and experimental results.