The HDA-100 active directional antenna operates from 500 MHz to 10 GHz, meeting various testing requirements across multiple scenarios. Its superior directional characteristics enable precise signal localization. The integrated high-performance broadband amplifier significantly improves system sensitivity, while the switchable Amp Off/On modes provide flexible dynamic range extension. With intelligent compatibility across the HAROGIC spectrum analyzer series and automatic antenna factor loading, the HDA-100 improves work efficiency.