radiation diagram vs radiation pattern

radiation diagram and radiation pattern both are nouns.

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

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

radiation diagram and radiation pattern: 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 diagram include pattern.

radiation diagram (noun)	radiation pattern (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