  Superconducting microwave resonators play a pivotal role in superconducting
quantum circuits. The ability to fine-tune their resonant frequencies provides
enhanced control and flexibility. Here, we introduce a frequency-tunable
superconducting coplanar waveguide resonator. By applying electrical currents
through specifically designed ground wires, we achieve the generation and
control of a localized magnetic field on the central line of the resonator,
enabling continuous tuning of its resonant frequency. We demonstrate a
frequency tuning range of 54.85 MHz in a 6.21 GHz resonator. This integrated
and tunable resonator holds great potential as a dynamically tunable filter and
as a key component of communication buses and memory elements in
superconducting quantum computing.
