2.45 GHz INTER-/INTRABOARD WIRELESS COMMUNICATION USING A CPW-FED VERTICAL BOW TIE ANTENNA

摘要

Coplanar waveguide (CPW)-fed vertically standing bowtie antennas for 2.45 GHz ISM band applications for inter-/intraboard wireless communication are presented. The vertical antenna scheme provides wave propagation in the horizontal direction parallel to the substrate, allowing effective in-plane board-to-board communication. The monopole bow-tie antenna is implemented in an air-lifted fashion, resulting in high efficiency, broad bandwidth, and small footprint compared with the conventional surface mounted patch type antenna. The vertical bow-tie antenna with a height of 22.4 mm and a flare angle of 43° shows a 10-dB bandwidth of 20.4%, a footprint of ～1 mm{sup}2, and a height reduction of 33% compared with a cylindrical monopole counterpart. A numerical analysis has been performed between 1 and 4 GHz and the transmission characteristics using two identical antennas have been performed at 2.45 GHz with a network analyzer. The numerical results are in good agreement with experimental data.