a multi - frequency , noise optimized active antenna consisting of one or several actively tuned antennas optimized over incremental bandwidths and capable of tuning over a large total bandwidth . one or multiple impedance transformers are connected to the antennas at an optimal location , with the transformers acting to reduce the impedance for optimal coupling to a transceiver / receiver . active components can be incorporated into the antenna structures to provide yet additional extension of the bandwidth along with increased optimization of antenna performance over the frequency range of the antenna . the radiating elements can be co - located with a ferrite material and / or active components coupled to the element to tune across a wide frequency range .