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Dual frequency band antenna combined with a high impedance band gap surface

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2 Author(s)
O. Folayan ; Department of Electronics and Electrical Engineering, Mappin Street, University of Sheffield, Sheffield, S1 3JD, UK E-mail: r.j.langley@sheffield.ac.uk ; R. Langley

A compact dual-band antenna structure for automotive and aerospace applications is discussed. A bow tie dual-band electromagnetic band gap (EBG) element geometry is presented that has a reduced cell dimension compared to the wavelength yet has sufficient bandwidth for mobile communication applications. The EBG was combined with a printed planar monopole to produce a structure 8 mm thick. The return loss and radiation patterns gave satisfactory performance at two frequency bands with bandwidths of 11% at 1700 MHz and 7% at 2600 MHz. There was suppression of the back radiation at both bands of 5 dB or better even for the small 3 times 3 element EBG used and the antenna was platform tolerant.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:3 ,  Issue: 7 )