The compact stacked log-periodic STLP 9128 E special from Schwarzbeck adopts dual stacked dipoles to deliver 2 dB higher gain, with folded longest elements reducing overall width for small anechoic chambers. It covers 80 MHz to 2700 MHz ultra-wide usable range, featuring low VSWR for perfect matching with high-power RF amplifiers. Two connector options (N / 7/16) support up to 3 kW pulsed input power. With excellent cross-polarization rejection and bidirectional transmit/receive capability, it fully complies with civil, automotive and military radiated immunity EMC standards, serving as the mainstream high-field transmit antenna for 3 m / 10 m anechoic chambers.