Wire inverted F antennas (WIFAs) are commonly used on small Unmanned Aerial Vehicles (UAVs) for telemetry and command signals because oftheir bidirectional asymmetric pattern. However, the wire inverted F antennas similar to other wire antennas have disadvantages such as high aerodynamic drag and a high degree of electromagnetic coupling to the fuselage. Another approach is to use the low profile surface wave antennas (SWAs) and Keywords- planar antenna; surface wave antenna; periodic structure; bidirectional asymmetric radiation pattern; wire inverted F antenna
