Antenna Support, How to Choose an Antenna Weatherproof antennas Antenna Cables & adapters to better position your antenna Antenna Mounts Bulkhead Nut washer o-ring RP-SMA Dipole Antennas Dual Band Antennas

Data Alliance Antennas Antennas by connector type Signal Loss in Antenna Cables.  LMR-100, LMR-200, LMR-400 Signal-loss (attenuation) in LMR-100 and LMR-200 cables

Operate 2 Antennas from One Radio: Use a "Power Divider" or "Antenna Combiner" - NOT a T-adapter

Do not use a "T connection" to get one AP to service two antennas: This causes many problems, further described below.  By "T connection," we mean T-adapter (see photo below) to combine two antennas onto the same antenna cable.

A "T" is the incorrect way to split to antennas or transmitters. It results in a 2:1 impedance mismatch. That in turn, will cause signal degradation and probably equipment failure. You must use a "power divider" or "antenna combiner" device to operate two antennas from one transmitter. These devices are not expensive, and they are necessary. There are many variations on the concept, but the end result is that a 50 ohm load is presented to the transmitter, and each antenna "sees" a 50 ohm transmitter as well.

The common TV "splitter" does work for exactly the reasons above. At 2.4 GHz, our requirements are more stringent than at TV frequencies, but the approach is exactly the same.

Posted by

Frequency Bands of WiFi, Bluetooth, 5G, 4G, 3G, LTE, GSM, ISM, CDMA Top Tips for Long Range WiFi Data Alliance is an American company based in Arizona, USA Dimensions / Measurements of RP-SMA connectors U.FL cables MHF4 Cables


Top Tips for Long Range WiFi LTE Antennas, GSM Antennas, 4G Antennas Through-hole antenna mounts Adhesive Mount Antennas Tripod Antenna Mounts
RP-SMA cables and adapters SMA antenna cables and adapters N-type cables and adapters U.FL cables MHF4 Cables MMCX cables
Dimensions / Measurements of RP-SMA connectors Signal-loss (attenuation) in LMR-100 and LMR-200 cables RP-SMA antenna BNC cables RP-TNC cables and adapters Roof Mounts for Antennas