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We present high sensitivity ($\sigma_P \simeq 0.6\,$mJy) polarimetricobservations in seven bands, from $2.1$ to $38\,$GHz, of a complete sample of$104$ compact extragalactic radio sources brighter than $200\,$mJy at$20\,$GHz. Polarization measurements in six bands, in the range $5.5-38\,$GHz,for $53$ of these objects were reported by \citet{Galluzzi2017}. We have addednew measurements in the same six bands for another 51 sources and measurementsat $2.1\,$GHz for the full sample of $104$ sources. Also, the previousmeasurements at $18$, $24$, $33$ and $38\,$GHz were re-calibrated using theupdated model for the flux density absolute calibrator, PKS1934-638, notavailable for the earlier analysis. The observations, carried out with theAustralia Telescope Compact Array (ATCA), achieved a $90\%$ detection rate (at$5\sigma$) in polarization. $89$ of our sources have a counterpart in the $72$to $231\,$MHz GLEAM survey \citep{HurleyWalker2017}, providing an unparalleledspectral coverage of $2.7$ decades of frequency for these sources. While thetotal intensity data from $5.5$ to $38\,$GHz could be interpreted in terms ofsingle component emission, a joint analysis of more extended total intensityspectra presented here, and of the polarization spectra, reveals that over$90\%$ of our sources show clear indications of at least two emissioncomponents. We interpret this as an evidence of recurrent activity. Our highsensitivity polarimetry has allowed a $5\,\sigma$ detection of the weakcircular polarization for $\sim 38\%$ of the dataset, and a deeper estimate of$20\,$GHz polarization source counts than has been possible so far.

Characterization of polarimetric and total intensity behaviour of a complete sample of PACO radio sources in the radio bands