A dual polarization bow-tie slot antenna for broadband communications is proposed in this paper. This antenna consists of two bow-tie slot antennas which is perpendicular to each other and with coplanar waveguide (CPW)-fed. The proposed antenna has a very simple antenna structure and wide impedance bandwidth (～ 400% for |S_(11)| and |S_(22)| ≧ 10 dB) which can cover the 1.5 ～ 6 GHz frequency band for Global Positioning System (GPS, 1575 MHz) and dual ISM band (2.4 GHz and 5.8 GHz) applications. Good isolation between the two input ports (|S_(21) ≧ 20 dB) is also achieved at the operating band. The radiation pattern and efficiency of the proposed antenna are also measured, and radiation pattern data are compared with simulation results.
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