If you are looking for a super tiny, cheap and lightweight FPV camera that uses a proper circular polarised antenna, then the A6 Micro is a great option. It features a 600TVL camera connected to a 25mW VTX, making it a super easy addition if you want to add FPV to just about anything. The unit is powered by 3-5V and weighs just 4.3g.

Specifications

• Output power: 25mW
• Input power: 3.2-5V
• Current consumption:3.2V-5V,250mA(type)
• Camera resolution: 600TVL
• Video system: NTSC
• Mini illumination: 1 lux
• Field of view: 120viewing angle
• Antenna dimensions: 22mm X 29mm diameter
• Antenna: 4 lobe right hand circular polarized
• Frequency: 5.8GHz 5 bands 40 channels,
  with Raceband: 5658-5917MHz
• Size: 18.7*13mm(L*W)
• Weight: 4.3g