\begin{table}%t6
\caption{\label{tab6}Specifications of the front-end modules.}
%\centering
\par
\begin{tabular}{p{9cm}ccc}
\hline\hline\noalign{\smallskip}
 &30 GHz&44 GHz&70 GHz \\
\hline
Band [GHz] \dotfill &27--33&39.6--48.4&63-77 \\
Noise temperature over band [K] \dotfill &8.6&14.1&25.7 \\
Gain (average over band) [dB] \dotfill &30--33&30--33&30--33 \\
Gain variation with physical temperature [dB/K] \dotfill &0.05&0.05&0.05 \\
Noise temperature variation with physical temperature [K/K]  \dotfill &0.8&0.8&0.8 \\
$1/f$ knee frequency [mHz] \dotfill &$<$20&$<$20&$<$20 \\
Cross polarisation [dB] \dotfill &$<$$-35$&$<$$-35$&$<$$-35$ \\
Average power dissipation per FEM [mW] \dotfill &31&31&24 \\
\hline
\end{tabular}
\end{table}