Learning along the way.
Having purchased myself one "433MHz GSM GPRS 90° SMA male plug right angle 10cm Ham radio Gold" antenna I disassembled it.
It turns out it uses a 2,5 cm helical. The additional 7,5 cm of void space inside the plastic cover are used for... well Feng Shui purposes. They should be harnessing Chi.
Having purchased myself one "433MHz GSM GPRS 90° SMA male plug right angle 10cm Ham radio Gold" antenna I disassembled it.
It turns out it uses a 2,5 cm helical. The additional 7,5 cm of void space inside the plastic cover are used for... well Feng Shui purposes. They should be harnessing Chi.