Directional and Omnidirectional Antennas
The different types of Drone FPV Antenna radiation patterns can be divided into two categories based on the directivity of the beam; directional and omnidirectional. Directional antennas are optimized for beaming a signal over long distances and in a very specific direction. Omnidirectional, as the name suggests, are best suited for the radiation of a radio signal in as many directions as possible, but over a relatively shorter range. The radiation pattern of the directional antenna can be pictured as being conical, the point of the cone originating at the antenna. As the cone projects from the antenna it gradually widens, before eventually coming to an end. Any object within the range of this cone will be capable of receiving the transmitted signal, or transmitting its own signal to the receiving antenna. Directional antennas are best suited for receiver-side applications, where they can be positioned to allow optimal reception of the signal transmitted by the video transmitter. As for omnidirectional antennas, their evenly distributed radiation pattern is shaped as if a donut has been slid over the top of the antenna, the active site of the antenna surrounded by the donut. The radiation pattern of an omnidirectional antenna can be clearly pictured as being particularly well dispersed in all directions around the antenna except directly above and below the antenna. An omnidirectional antenna is typically used with the video transmitter, as the omnidirectional antenna is well adapted to overcoming sudden changes in the attitude and direction of an aircraft’s flight.