  In this paper, the integrated continuum radio spectrum of supernova remnant
(SNR) W44 was analyzed up to 70 GHz, testing the different emission models that
can be responsible for its particular shape. The observations by the Planck
space telescope made possible to analyze the high frequency part of radio
emission from SNRs. Although the quality of radio continuum spectrum (a high
scatter of data points at same frequencies) prevents us to make definite
conclusions, the possibility of spinning dust emission detection towards this
remnant is emphasized. In addition, a concave-down feature, due to synchrotron
losses, can not be definitely dismissed by the present knowledge of the
integrated radio continuum spectrum of this SNR.
