The TLA-300 triple ring antenna is a 2-meter circular antenna that complies with CISPR 15 and CISPA 16-1 standards testing. The bottom is at least 0.5m above the ground and is specifically designed with a shielded current converter. It is a 3-axis antenna that selects one circular antenna for testing through switch switching. Each antenna provides individual antenna factor data and can be used with any EMC receiver or frequency spectrum analyzer. In open field testing, TLA-300 can effectively suppress environmental noise. It adopts an assembled design, which is convenient for folding and use.