DarwinFPV Quantum 5.8GHz - 110mm RHCP u.FL

DarwinFPV Quantum is an omnidirectional antenna with RHCP polarization, a u.FL connector, for the 5.0-6.2GHz band. Weighing just 3g and with a total length of 110mm, it is suitable for the transmitting side of lightweight freestyle and racing drones, where every gram counts. Thanks to the u.FL connector, the antenna plugs directly into the video transmitter, saving both weight and space.

RHCP polarization is suitable for analog video transmission or HDZero. The wide frequency band covers all common video transmitter channels, including frequencies above 5.9GHz. The manufacturer states a maximum measured radiation efficiency of 60.18% and uniform 360° radiation measured in an anechoic chamber, resulting in fewer video dropouts during dives and sharp turns.

The radiating element is made as a gold-plated PCB. PCB manufacturing ensures minimal differences between individual units, while the gold plating resists oxidation and reduces signal loss. The manufacturer specifies an axial ratio of 1 and VSWR ≤1.3. The axial ratio indicates how accurately the radiated wave is circular; a value close to 1 means lower losses between the transmitter and receiver and better suppression of reflections from the ground and obstacles. The radiating element is protected by a transparent cover made of durable PC+ABS plastic with a diameter of 15mm, which withstands hard crashes.

Below the antenna head is a solid black section (“foot”) used to secure the antenna in a mount on the drone frame; the rest consists of a thin coaxial cable terminated with a u.FL connector.