An electrically small planar antenna

It has been previously shown that it is possible to match an electrically small antenna to a 50-ohm coaxial line by placing a matching post near the base of the antenna. This antenna was designed to fit in a cubical volume. In this investigation we design a planar antenna which is also electrically small, self-resonant and is matched to a 50-ohm coaxial line; it is mounted over a ground plane. It is also much thinner and could be used for closely spaced array elements. It is actually a modification of an inverted-F antenna where an extra set of parallel wires is added to that antenna. In order to achieve the matching, we place an inductance at its endpoint and use a matching post near the input of the antenna, both of which are connected to the ground plane. We conducted simulations of the antenna configuration for different values of antenna length, width, height, inductance terminations and matching posts. After obtaining satisfactory computational results, we built and tested three of these antennas