The IsoLOG 3D is an Isotropic RF 3D Tracking Antenna that operates from 9 kHz to 35 GHz. It includes a high density, customizable LPDA sector array which consists of at least 8 and up to 36 LPDA antennas, for horizontal and for vertical polarization. In addition to this 8 or 16 specialized low frequency Antennas can be added to extend the frequency range down to 9kHz, giving it the capability of having up to 52 independent antennas. The antennas and the electronics are protected by a radom which can be ordered in any color with optional prints. The radom is watertight, shock resistant and heat-proofed to withstand even harsh conditions. This is the perfect solution for counter-surveillance measurements or drone-detection-systems (unmanned air vehicle). The wide frequency range eliminates the need of various antenna set ups to save space and system cost. This makes it usable for mounting on vehicles (e.g. drive test cars etc.) and for hidden operations. Looking like a satellite dish for camping vans the antenna is not recognized as a tracking antenna. The IsoLOG 3D is sensitive to the most incoming signal polarizations including all linear polarizations, allowing reliable detection of signals including those invisible to most DF systems that use only vertically polarized antennas.