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Figure 1: Radio spectra of the eight RS CVn systems at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz for all the epochs of observation. The axes are logarithmic. The black symbols denote the values detected at different frequencies, and are joined by a dot-dashed line for the corresponding epoch of observation. The white filled, inverted triangles denote the 3 upper limits, which are joined by dotted lines to the values detected for the corresponding epoch of observation. Error bars are also plotted, most of which are smaller than the symbol's size.

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In the text

Figure 2: Degree of circular polarization as a function of flux density (in mJy), at 4.9 GHz and 8.5 GHz, for the eight RS CVn binaries of our sample. The axes are logarithmic. Error bars are plotted for the circular polarization values. Different symbols represent different systems. The symbol used for each binary system is the same as the one used in Fig. 1. The solid line in the 8.5 GHz observations plot is a fit to the data with a slope . The solid lines in the 4.9 GHz observations plot are fits to the data with a slope when all the systems are included and when RS CVn is not included. The triangle at the top of the 4.9 GHz plot represents RS CVn.

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In the text

Figure 3: Flux density and degree of circular polarization of EI Eri on August 31, at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz. The plot at the top shows the radio spectrum of EI Eri with spectral index between 1.4 and 4.9 GHz. Both axes are logarithmic. The bottom plot displays the circular polarization (in percent) as a function of the frequency of observation (logarithmic axis). The values at 4.9 GHz and 14.9 GHz are below a 3 level. There is a reversal in the sense of polarization between 1.4 and 8.5 GHz.

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In the text

	Figure 4: Flux as a function of time for the right circular polarization R (circle symbols) and the left L circular polarization (asterisk symbols) at 1.4 GHz of EI Eri on August 31. The flux variations are plotted in 12 s intervals.
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In the text

Figure 5: Flux density and degree of circular polarization of DM UMa for two epochs, June 6 and August 31, at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz. The plot at the top shows the radio spectra of DM UMa, with spectral indexes (June 6) and (August 31) between 1.4 and 4.9 GHz. Both axes are logarithmic. The bottom plot displays the circular polarization (in percent) as a function of the frequency of observation (logarithmic axis). There is a reversal in the sense of polarization between 1.4 and 4.9 GHz for both epochs.

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In the text

	Figure 6: Flux as a function of time at 1.4 GHz for the right circular polarization R (circle symbols) and the left circular polarization L (asterisk symbols) of DM UMa on June 6 and August 31. The flux evolution is plotted in 12 s intervals. Polarization R in the bottom plot has been arbitrarily increased by 5 mJy for the sake of comparison with polarization L.
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In the text

Figure 7: Flux density and degree of circular polarization of HD 8358 on August 31, at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz. The plot at the top shows the radio spectrum of HD 8358 with spectra index between 1.4 and 4.9 GHz. Both axes are logarithmic. The bottom plot displays the circular polarization (in percent) as a function of the frequency of observation (logarithmic axis). There is a reversal in the sense of polarization between 1.4 and 4.9 GHz.

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In the text

	Figure 8: Flux as a function of time for the right circular polarization R (circle symbols) and the left L circular polarization (asterisk symbols) at 1.4 GHz of HD 8358 on August 31. The flux variations are plotted in 12 s intervals.
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In the text