Adaptive antennas: Measurements on a two-element fix-frequency system in real terrain

Field measurements on a two-element fix-frequency adaptive system, PV2413A, for 30 to 88 MHz are described. In open fields the system acts very well. In woodland there are cases with impaired cancellation as a result of the multipath environment, but the PV2413A sometimes works better in woodland relative to the open field case. Cancellation depths of 30 to 60 dB are obtained. The measurements were made with a two-element system on a vehicle with three antenna elements. Comparing results from the various combinations shows that an adaptive system with three antenna elements is better suited to manage heavy multipath fading.