The Keysight 11966G conical log spiral antenna ideally suited for MIL-STD-461A/B/C radiated measurements and operates in the 1 to 10 GHz range. Because it is circularly polarized, it can receive fields in any polarity. This eliminates the need to duplicate the measurement in both horizontal and vertical orientation to find maximum emissions.
The 11966G can be purchased directly from ETS-Lindgren.
Ideally suited for MIL-STD-461A/B/C radiated measurements