A Rubber Duck Antenna for 403 – 520 MHz is a compact, flexible, omnidirectional radio antenna engineered to provide reliable performance across the UHF frequency band used for two-way radios, wireless communication systems, trunking, public safety equipment, and mobile communication devices. Unlike a rigid whip antenna, this design uses a springy, helical radiating element enclosed in a rugged rubber or plastic jacket, giving it resilience against impacts, bending, and general wear in portable and mobile environments. The antenna operates effectively between approximately 403 MHz and 520 MHz, covering a broad section of the UHF spectrum. Its omnidirectional radiation pattern radiates signal uniformly in all horizontal directions (360°), making it ideal for handheld radios and mobile equipment where orientation can change frequently. Vertical polarization ensures compatibility with most two-way radios and UHF communication systems.
Designed with 50-ohm impedance matching to standard RF equipment, this rubber duck antenna typically exhibits a nominal gain around 2.15 dBi—providing a good balance between range and compact size without requiring a full-length quarter-wave whip. Its Maximum VSWR is engineered to remain low across the specified frequency band, limiting signal reflection and optimizing power transfer between the transmitter/receiver and the antenna.
Mechanically, the antenna weighs only a few ounces and is typically around 150 mm to 170 mm in length (varies by manufacturer) with a durable radome that protects internal components from moisture, dust, and impact. Standard connector types such as SMA, BNC, TNC, or Motorola (MOTO) allow simple plug-and-play installation on compatible radio transceivers. Many models can handle up to 20 W of input power and withstand temperatures from −40 °C to +60 °C, enabling use in both indoor and outdoor environments.
Reviews
There are no reviews yet.