Here's an antenna with high quality but low price ($5/piece), universal usage for all FPV equipment, like fpv googles, fpv transmitters and receivers, fpv monitors, quadcopters, multicopters, drones, etc

Features:

Small size: 4mm x 1mm x 88mm (Max diameter x Min diameter x Height)

Connector: 1 x SMA Male, 1 x RP-SMA Male

Genuine 5DBi enable better transmission

5.8 GHz suit for transmitter and receiver

Specifications: 

Frequency Range:5.8GHz
Connector:SMA/RP-SMA
Gain:5dBi
VSWR:<1.5:1
Max Power:50W
Impedance:50Ω
Height:88mm
Max diameter:4mm 
Min diameter:1mm 
Lighting Protection:DC Grounded
Polarization:Circular polarization (RHCP)
Model Type:4-leaf Antenna 
Package Included: 
1 x 5.8G Four Leaf SMA Male Antenna
1 x 5.8G 4-Leaf RP-SMA Male Antenna