We study the deformation quantization of scalar and Abelian gauge classical
free fields. Stratonovich-Weyl quantizer, star products and Wigner functio
nals are obtained in field and oscillator variables. The Abelian gauge theo
ry is particularly intriguing since the Wigner functional is factorized int
o a physical part and the other one containing the constraints only. Some e
ffects of nontrivial topology within the deformation quantization formalism
are also considered.