X²-Air 5.8 MKII & Core 5.8 Antenna Combo for Dominator HD Goggles



In stock


Our high efficiency X²-AIR MK II with direct RP-SMA connectors for installing on the Fat Shark dominator HD or Walksnail Avatar FPV goggles. Simply screw on the custom knurled RP-SMA connectors on the front ports of the goggles. Great 13dBic gain combined with a healthy flyable beam width of 150deg, yield an amazing long range performances. Fill the remaining ports with the 120mm Core 5.8 antennas and you got the full house.

Custom made RP-SMA connectors, direct fit for your goggles.

As with all other components of X²-AIR antennas, the custom RP-SMA connector is made to the highest standards to fit your Walksnail avatar or Fat Shark dominator without adapter and make sure every bit of RF power is transferred from the  X²-AIR. A knurled finish provide easy tightening and a quality look exclusive to TrueRC.


  • Circularly Polarized
  • Mount direct on Walksnail avatar or Fat Shark dominator
  • Sector type beam shape (widest on horizontal)
  • High 13 dBic for unsurpassed long range and signal penetration
  • Large SWR and axial ratio bandwidth, work even out of the 5.8GHz band
  • Super wide 150 degree Sector type beam (widest on horizontal)
  • Custom knurled RP-SMA connectors 


X²-Air 5.8 MK II

  • Bandwidth: 5.1GHz-7.0GHz
  • Gain: 13 dBic
  • Polarization: LHCP or RHCP
  • Beam-width Horizontal*: 150deg
  • Beam-width Vertical*: 62deg
  • Hor. beam @-3dB**: 75deg.
  • Vert. beam @-3dB**: 34deg.
  • Connector: Custom knurled RP-SMA
  • Dimension: 72mm x 34mm x 15mm 

*Coverage of individual antenna where reception is at least equivalent to an omni.
**Coverage of individual antenna where at least 70% of the max range is obtained. 

Core 5.8

  • Gain: 1.9dBic
  • Polarization: RHCP or LHCP
  • Cross-Polar Rejection: -10 to -20dB
  • Bandwidth: 5.5GHz-6.1GHz
  • Radiation Efficiency: 98%
  • SWR: <=1.2:1
  • Weight: Vary with connector/cable option
  • Dimensions(head): 16.9mm dia. x 13.1mm height.
  • Length: 120mm
  • Cable: TrueRC RG316S/RG402/RG178 coax
  • Connector: Reinforced True-SMA (RP-SMA)


  • 2x X²-Air MKII Antennas
  • 2x 120mm Core 5.8 Antennas


Customer Reviews

Based on 1 review
ludicrous signal.

if you can lose signal with these its your fault. I used to fly at 1000mw all the time with stock stubbies, now I can go all over my local spots without signal loss on 200mw. the two patch antennas should be at offset angles to each other to improve the signal band, I set them at 30 degrees or so to make an x pattern to offset the two 150 degree cones, same with the two omnidirectional antennas, offset to cover the dead band area of the two antennas. don't fly outside of line of sight of your spotter.

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