CST – Computer Simulation Technology

Wearable dual-band Sierpinski fractal PIFA using conductive fabric
P.J. Soh, G.A.E. Vandenbosch, S.L. Ooi, M.R.N. Husna
Electronics Letters
Volume: 47, Issue 6, 17 March 2011
365 - 367
Antennas to be integrated on-body are crucial in catering for various future 802.15 wireless standards. The main barrier to implementing these antennas is usually the degraded performance when operating in proximity of the body, e.g. the reduced bandwidth. Large bandwidth or dual-band behaviour is needed in multi-application wireless devices. Several techniques have been implemented to broaden the bandwidth, including the introduction of slots [1, 2], folding and rolling up of larger elements [3, 4], addition of parasitic elements [5], and integration of several radiators into a single structure [6, 7]. An effective way to generate dual- and multi-band frequency response is using fractal Sierpinski topologies. However, gasket monopoles, in which these structures are traditionally implemented, limit a planar implementation on a small physical area [8]. Incorporating the structure into a planar inverted-F antenna (PIFA), which is the key novelty in this Letter, provides a means of planar implementation.

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