Flexible 2.4GHz Omni-Directional Whip Antenna
The FW.24 is a flexible 2.4GHz omni-directional whip antenna with an N-type (M) connector for outdoor use. It features excellent efficiency (>75%) and high peak gain (>4 dBi) between 2400-2500MHz on a 30×30 cm ground plane. The antenna was specifically developed for applications in outdoor monitoring systems, such as weather monitoring, motion/vibration sensors, and pollutants monitoring. The FW.24 works in the 2.4GHz WiFi/Bluetooth/ISM band. It has excellent omni-directional radiation properties providing a wide coverage area in the azimuth. Its high efficiency means that it allows your radio to consume less power than with a lower efficiency antenna when transferring data, while also achieving better sensitivity of reception. The antenna performs at its best while attached to a ground plane with dimensions of at least 30×30 cm, though it can be used even without ground-plane.
The whip is made of a flexible inner steel core covered by PE so it is extremely resistant to abrasion and springs back to its original shape if bent. The rugged design and its housing’s IP65 rating ensure it can withstand bad weather, environmental stress and physical shock in the field. Many module manufacturers specify peak gain limits for any antennas that are to be connected to that module. Those peak gain limits are based on free-space conditions. In practice, the peak gain of an antenna tested in free-space can degrade by at least 1 or 2dBi when put inside a device. So ideally you should go for a slightly higher peak gain antenna than mentioned on the module specification to compensate for this effect, giving you better performance.