Antenna Genius

Antenna Genius is a smart antenna switch. Avaliable in two different models: 8×2 (8 antennas to 2 radios) and 8×1 (8 antennas to 1 radio). The new plus series can be expanded with a 16 relay Output Module allowing flexible station automation.


  • 8 antennas to 2 radio is perfect for SO2R and multi-op contesting or making the most of your dual RX transceiver.
  • 8 antennas to 1 radio designed for less demanding applications.
  • 160 through 6-meters bands.
  • Highest port-to-port isolation on the market. Typical values are  75dB @ 50-MHz,  81dB @ 30-MHz, > 90dB @ 14-MHz.
  • Up 20 dB better than other brands. Perfect if you are using SO2R or one radio full duplex (e.g. FlexRadio 6000 series).
  • Capable of 3000W @ 1.5:1 VSWR CCS (e.g. RTTY) duty cycle for five minutes.
  • Hardware level interlock system prevents two radios from connecting to the same antenna.
  • Antenna Genius insures your RX antennas will not be used as TX.
  • Dedicated port for connecting Output Modules with each Output Module having 16 relay outputs. Users can combine up to two Output Modules according to their needs.
  • Controlled automatically by FlexRadio, 4O3A Interface Genius, BCD or manually by our Windows app or Pin To Port.
  • Configurable by an intuitive Windows app.
  • User programmable band ranges.
  • Antenna Genius 8×2 Plus can be combined together for extending the number of antenna ports to 16, 24 or 32.
  • Can be remotely controlled over LAN or internet.
  • DC power, RJ-45 (100-Mbps Ethernet), 2 x 15-pin DE-15 socket (VGA style)
  • TCP/IP (100-Mbps Ethernet) built in, DHCP-assigned or static IP address.
  • Rugged stainless steel chassis with wall mount flange.
  • Requires 13.8-VDC power supply. Power Consumption: 13.8-VDC @ 300mA.
  • Dimensions (HWD): 10.6″ x 6.7″ x 2.8″ or 27cm x 17cm x 7cm.
  • Weight: 5.5 lbs or 2.5 kg
  • LAN / WAN capability was a core design capability from day one and not an afterthought. The entire Genius product line: Interface Genius, Antenna Genius, Rotator Genius and Station Genius all work together seamlessly both locally and remotely.

    Regular firmware updates will continue add features to all 4O3A Genius devices free of charge for life.

    Each 4O3A Genius device has a comprehensive API to allow deep integration with other ham gear and software for logging, contesting, digital modes, etc.

    relay output



    Antenna Genius control is officially supported and by N4PY software. Communcation is performed using a TCP/IP connection insuring maximum stabillity and reliability. For more information consult the N4PY help files.


    My antenna genius is operating perfectly at -28°C -17.6°F right now. Industrial temp rated components as it operated flawlessly during the latest cold snap here in Minnesota.

    As you see in the photo there is frost on the inside of the enclosure which actually made conditions more rugged because I installed an external relay switch to change feeds on 20-15-10 M from my 4L SteppIR to a tribander for close in Caribbean and SA contacts during the CQWWCDW DX contest as a temporary measure, but left it in place during the cold weather.

    Thanks for a great product!
    Paul W0AD