  We present a new sensitive 2675 MHz radio continuum map of the Cygnus Loop,
which is used in conjunction with 408 MHz, 863 MHz and 1420 MHz maps from both
the Effelsberg 100-m telescope and the DRAO Synthesis Telescope for a spectral
analysis. Between 408 MHz and 2675 MHz we find an overall integrated spectral
index of $\rm \alpha = -0.42 \pm 0.06$ ($S \sim \nu^{\alpha}$), close to
previous results. There is no indication of a spectral break in the integrated
spectrum. Spatially highly varying and rather strong spectral curvature was
previously reported, but is not confirmed on the basis of new, higher
sensitivity observations. We found spectral variations across the Cygnus Loop
reaching up to $\Delta\alpha = 0.2$ from a TT-plot analysis. The flattest
spectra are seen towards enhanced emission areas. Spectral index maps produced
between different frequency pairs, as well as all four maps, revealed that
there are at least three flat spectrum regions. In regions interior to the high
emission filaments, we have detected at least two spectral components across
the whole object with $\alpha=-0.4$ and $\alpha=-0.6$ towards northern and
southern parts of the object, respectively.
