Array Antenna for Body-Worn Automotive Harmonic Radar Tag

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Cheng, S.; Hallbjörner, P.; Rydberg, A. (Uppsala University, Microwave Engineering, Box 534, 751 21 Uppsala, Sweden)
Hallbjörner, P. (SP Technical Research Institute of Sweden, Box 857, 501 15 Borås, Sweden)

A W-band four-by-four microstrip patch array antenna for body-worn automotive harmonic radar tag is presented in this paper. The antenna is fabricated on 100 µm thick liquid crystal polymer flex foil, using commercially available printed circuit board manufacturing processes. Port impedance and radiation patterns of the antenna are studied numerically and experimentally. The measured results are in good agreements with the numerical simulations. Experimental results indicate that a 2.5 GHz impedance bandwidth (S11=-10 dB) and a 16.4 dBi maximum antenna gain are achieved, at a center frequency around 80 GHz. Experiments with various types of dry and wet textiles are performed in order to study the effect of integration in clothes.