The Schwarzbeck STLP 9149 stacked microwave log-periodic antenna covers ultra-wide mid-to-high frequency 0.6 GHz to 10.5 GHz. Dual stacked dipoles deliver balanced E/H-plane beamwidth and superior field uniformity, fully complying with IEC 61000-4-3 radiated immunity standards. It maintains steady 10.3 dBi gain across full band with low VSWR for perfect RF amplifier matching, supporting up to 300 W continuous RF input. Compact enclosed lightweight 3.7 kg design offers bidirectional transmit/receive capability, supplied with traceable factory calibration certificate, serving as the standard antenna for mid-high frequency EMC chamber testing of automotive radar, wireless RF, military and aerospace products.