The ARA SAS-1/D 1kHz-1GHz E-Field Active Receiving Antenna is an extremely broadband portable receiving antenna designed specifically for accurate measurement of electric field intensity. They are ideally suited for wideband emission testing and spectrum surveillance applications. Integral active networks provide outstanding performance over the entire frequency range of operation - performance normally associated with full-scale antennas many times larger. Schottky diodes give the low-band preamplifier additional protection. The monopole elements of the antenna are removable for compact storage.