15cm 2.4GHz 5GHz Magnetic Antenna SMA Magnetic 2.4G WiFi Helical Antenna - China Antenna WiFi Boost, WiFi Wireless Antenna 30km | Made-in-China.com
DAOKAI 10 PCS Helical Spring Antenna 433MHz Build-In Antenna Copper Solder Bold Copper Spiral Coil 2.2dBi Gain Spring Antenna Direct Welding for Wireless Data Transmission: Amazon.co.uk: Business, Industry & Science