
Chelton's series of HF (High Frequency) antenna arrays are designed primarily to enable transmit/receive HF antennas to be installed on fixed and rotary wing aircraft in such a way as to optimise efficiency within the constraints of minimal drag, weight and size.
https://www.chelton.com/our-capabilities/antennas/communication-antennas/hf-and-adf/
https://www.chelton.com/our-capabilities/antennas/communication-antennas/hf-and-adf/