For more challenging installations where performance is crucial (such as long range foam planes), we recommend this 2.4GHz sleeve dipole antenna for the TBS Tracer receivers. They are lightweight and not T-shaped, so easier to install on flat or curved surfaces.
SPECIFICATIONS:
Total length: 136mm 
Weight: 1.00g
Gain: 1.5dBi
Connector: IPEX / u.FL
Expected range: Full range (15mi+/25km+ with TBS Tracer)