Cascaded-loop MW/SW receiving antenna rejects sky-wave interference and enables diversity reception at SW

摘要

It is shown that cascaded loop antenna (CLA) technology can be used to improve the quality of reception of HF broadcasts in two ways. The first is interference reduction by means of the stable null response, which is equally effective with either sky wave or ground waves. This requires one receiver and one CLA. Addition of a second CLA and receiver makes possible reception with binaural diversity. Using this method, broadcasts can be made clearer even when receivers of low cost and modest performance are used.