Multiband monopole antenna with minimised ground plane influence for portable devices. Issue 13 (6th September 2017)

• Record Type: Journal Article
• Authors: Khan, Rizwan; Al‐Hadi, Azremi Abdullah; Soh, Ping Jack; Ali, Muhsin; Owais, Owais; Islam, Imtiaz
• Is Part Of: IET microwaves, antennas & propagation. Volume 11:Issue 13(2017)
• Page Start: 1829
• Page End: 1835
• Publication Date: 2017-09-06
• Subjects: monopole antennas -- impedance matching -- antenna radiation patterns -- WiMax -- Global Positioning System -- wireless LAN -- Long Term Evolution -- multifrequency antennas; multiband monopole antenna -- minimised ground plane influence -- portable devices -- LTE band -- WLAN -- GPS -- WiMAX -- reflection coefficient -- ground plane -- operating frequency -- impedance bandwidth -- antenna geometry -- feed position -- current distribution -- impedance matching level -- omnidirectional radiation pattern -- frequency 0.746 GHz to 0.787 GHz -- frequency 1.427 GHz to 1.495 GHz -- frequency 1.71 GHz to 1.88 GHz -- frequency 2.4 GHz to 2.48 GHz -- frequency 3.3 GHz to 3.88 GHz; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2016.1084
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A multiband monopole antenna with minimised ground plane influence for portable devices is presented. This antenna operates at LTE band 13 (0.746–0.787 GHz), GPS, LTE band 11 (1.427–1.495 GHz), LTE band 3 (1.71–1.88 GHz), WLAN (2.4–2.48 GHz) and WiMAX (3.3–3.88 GHz) with at least −6 dB of reflection coefficient. The performance of antennas for portable devices is commonly influenced by the ground plane to result in variation in terms of operating frequency, impedance bandwidth and radiation pattern. Via a parametric investigation of the antenna geometry and its integration with peripherals devices, it is validated that the influence of the ground plane is minimised by adjusting the feed position. This in turn reduces the current distribution on the ground plane. It is also noticed that the impedance matching level is also more robust with the reduction of ground plane influence. The antenna features an omnidirectional radiation pattern across the all operating frequencies. Fabrication and assessment of the fabricated antenna indicated a close agreement with simulations.