  Fifth-generation (5G) new radio (NR) deployments are being rolled out in both
the C-band (3.3 - 5.0 GHz) and millimeter-wave (mmWave) band (24.5 - 29.5 GHz).
For outdoor scenarios, the C-band is expected to provide wide area coverage and
throughput uniformity, whereas the mmWave band is expected to provide
ultra-high throughput to dedicated areas within the C-band coverage. Due to the
differences in the frequency bands, both systems are expected to be designed
with different transmit and receive parameters, naturally resulting in
performance variations proportional to the chosen parameters. Unlike many
previous works, this paper presents measurement evaluations in central
Auckland, New Zealand, from a pre-commercial deployment of a single-user,
single-cell 5G-NR system operating in both bands. The net throughput, coverage
reliability, and channel rank are analyzed across the two bands with baseband
and analog beamforming. Our results show that the C-band coverage is
considerably better than mmWave, with a consistently higher channel rank.
Furthermore, the spatial stationarity region (SSR) for the azimuth
angles-of-departure (AODs) is characterized, and a model derived from the
measured beam identities is presented. The SSR of azimuth AODs is seen to
closely follow a gamma distribution.
