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Diode-switched thermal-transfer printed antenna on flexible substrate

Kgwadi, M. and Drysdale, T. D. (2016). Diode-switched thermal-transfer printed antenna on flexible substrate. Electronics Letters, 52(4) pp. 258–260.

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URL: http://dx.doi.org/10.1049/el.2015.3060
DOI (Digital Object Identifier) Link: https://doi.org/10.1049/el.2015.3060
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Abstract

We demonstrate that diode-switching can be used to introduce frequency agility into antennas produced by thermal transfer printing. Our particular example is a triangular Sierpinski fractal pattern with two PIN diodes to switch between operation optimised for the 800 MHz UHF band (diodes on) and the 2400 MHz ISM band (diodes off). Our measured results show an improvement in S11 in the UHF band from -2 dB to -28 dB, and from -7 dB to -30 dB at 2400 MHz, when switching the diodes appropriately. The measured bandwidth is 200 (1000) MHz, and the measured directivity is 3.1dB (5.2dB) while the measured gain is -5.2dB (6.7dB) for the diodes on(off).

Item Type: Journal Item
Copyright Holders: 2016 Institution of Engineering and Technology
ISSN: 1350-911X
Keywords: UHF diodes; UHF antennas; microstrip antennas; antenna radiation patterns; p-i-n diodes; flexible electronics; ultra-high frequency band; PIN diodes; UHF band; frequency 2400 MHz; gain -5.2 dB; ISM band; triangular Sierpinski fractal pattern; frequency 800 MHz; frequency agility; flexible substrate; diode-switched thermal-transfer printed antenna
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 46090
Depositing User: Timothy Drysdale
Date Deposited: 18 Apr 2016 14:34
Last Modified: 01 Dec 2016 03:38
URI: http://oro.open.ac.uk/id/eprint/46090
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