The dipole T antenna is designed and manufactured by BETAFPV for 2.4G receivers. This antenna is omnidirectional. An included RF balun circuit comes with this dipole antenna, just inside the injected rubber enclosure. Every antenna is tested with an RF frequency spectrograph.

RF Antenna Balun
What is a Balun and why should we use it in these dipole T antennas? In order for these balanced antennas to be fed by coaxial cable, an antenna balun is often included at the feed point.