A single feed dual frequency dual linear polarized patch antenna with tunable frequency ratio

In this paper, we present a novel low profile single feed dual frequency and dual linear polarized microstrip patch antenna, which is offset fed and offers tunable frequency ratio (fH/fL). In order to achieve tunable frequency ratio, two microstrip wings were set on both sides of the main patch, which are connected with the help of four varactor diodes. Different frequency ratios can be obtained by adjusting the varactor bias voltage. Additional results will be presented during the symposium.