Omnidirectional Antenna 0.03-3GHz Frequency Range RM-OA0033

An omnidirectional antenna is a type of antenna that provides 360-degree uniform radiation in the horizontal plane. While its name originates from this key characteristic, it does not radiate uniformly in all three-dimensional directions; its radiation pattern in the vertical plane is usually directional, resembling a “doughnut” shape.

The most common examples are vertically oriented monopole antennas (like the whip antenna on a walkie-talkie) or dipole antennas. These antennas are designed to communicate with signals arriving from any azimuth angle without the need for physical alignment.

The primary advantage of this antenna is its ability to provide broad horizontal coverage, simplifying link establishment for mobile devices or a central base station communicating with multiple terminals. Its disadvantages are relatively low gain and the dispersion of energy in all horizontal directions, including undesired upward and downward areas. It is widely used in Wi-Fi routers, FM radio broadcast stations, mobile communication base stations, and various handheld wireless devices.