radiation pattern vs radiation diagram

radiation pattern and radiation diagram both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiation pattern	Yes	No	No	No
radiation diagram	Yes	No	No	No

As nouns, radiation pattern and radiation diagram are synonyms defined as:

radiation pattern and radiation diagram: graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle

Other synonyms of radiation pattern include pattern.

radiation pattern (noun)	radiation diagram (noun)
graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle	graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle