  AV$_3$Sb$_5$ (A=Cs, K, Rb) are recently discovered superconducting systems
($T_{\rm c}\sim0.9-2.5$ K) in which the vanadium atoms adopt the kagome
structure. Intriguingly, these systems enter a charge-density-wave (CDW) phase
($T_{\rm CDW}\sim80-100$ K), and further evidence shows that the time-reversal
symmetry is broken in the CDW phase. Concurrently, the anomalous Hall effect
has been observed in KV$_3$Sb$_5$ and CsV$_3$Sb$_5$ inside the novel CDW phase.
Here, we report a comprehensive study of a high-quality RbV$_3$Sb$_5$ single
crystal with magnetotransport measurements. Our data demonstrate the emergence
of anomalous Hall effect in RbV$_3$Sb$_5$ when the charge-density-wave state
develops. The magnitude of anomalous Hall resistivity at the low temperature
limit is comparable to the reported values in KV$_3$Sb$_5$ and CsV$_3$Sb$_5$.
The magnetoresistance channel further reveals a rich spectrum of quantum
oscillation frequencies, many of which have not been reported before. In
particular, a large quantum oscillation frequency (2235 T), which occupies
$\sim$56% of the Brillouin zone area, has been recorded. For the quantum
oscillation frequencies with sufficient signal-to-noise ratio, we further
perform field-angle dependent measurements and our data indicate
two-dimensional Fermi surfaces in RbV$_3$Sb$_5$. Our results provide
indispensable information for understanding the anomalous Hall effect and band
structure in kagome metals AV$_3$Sb$_5$.
