The term "signal beam" can be used in various contexts, such as telecommunications, astronomy, and navigation. There are many synonyms to describe this kind of light emission, such as transmission beam, radio beam, laser beam, and radar beam, each of which refers to a specific type of signal transmission. In astronomy, the term "beam" is often used to describe the direction of a particular light emission from a celestial object, such as a pulsar or a quasar. Similarly, in navigation, the term "navigation beam" refers to a directional radio wave that indicates the position of a particular location or object. In short, the term signal beam has many synonyms based on the application and context in which it is used.