A fixed antenna direction finder is a useful tool used to locate the source of a radio signal. However, there are several synonyms for the term that may be useful for those who need to use or discuss this technology. Some of these synonyms include radio direction finder, RDF, and radio compass. Another term that can be used interchangeably with fixed antenna direction finder is radio direction finding (RDF) system. In some cases, the term radio homing may also be used to describe fixed antenna direction finders. Regardless of the term used, these tools are essential for radio communications and can be valuable assets in a variety of settings, from military operations to search and rescue missions.