https://www.data-alliance.net/blog/helium-network-antenna-upgrades-cables-mounts-weatherproofing-gear/
Nova Labs (Helium Network) Antennas: Cables, Mounts, Weatherproofing Upgrades - Data-alliance.net
Gear to optimize the range of your Helium hotspot. Mount antenna in the optimal location outside your window.
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https://www.dxzone.com/dx28079/coax-two-antenna-matching-network.html
Coax Two Antenna Matching Network - Antennas/Feed Lines | The DXZone
50 Ohm Coax Antenna Power Splitter and Matching Network
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