Planar antenna arrays of a balanced structure are of great importance in
many applications due to their features including low-profile, wideband
and high polarisation purity. However, feeding such antennas adds great
complexity in terms of manufacturing and reduces the performance due to
production of common mode propagation. A method for feeding such
antennas using coplanar waveguide on a thin substrate is proposed. Not
only does it terminate the antenna of a balanced structure with a
single-ended feed but it also enables impedance transformation. The
design was an attempt towards a completely printed front-end that
incorporates the antenna elements and their feeding circuits on bendable
substrates. The electromagnetic performance has been validated with a
dual polarized prototype and its prospect for ultrawideband arrays e.g.,
5G sub-6 GHz or square kilometre array, was explored.