  Gravitational waves can generate electromagnetic effects inside a strong
electric or magnetic field within the Standard Model and general relativity.
Here we propose using a quarterly split cavity and LC(inductor and
capacitor)-resonance circuit to detect a high-frequency gravitational wave from
0.1 MHz to GHz. We perform a full 3D simulation of the cavity's signal for
sensitivity estimate. Our sensitivity depends on the coherence time scale of
the high-frequency gravitational wave sources and the volume size of the split
cavity. We discuss the resonant measurement schemes for narrow-band
gravitational wave sources and also a non-resonance scheme for broadband
signals. For a meter-sized split cavity under a 14 Tesla magnetic field, the LC
resonance enhanced sensitivity to the gravitational wave strain is expected to
reach $h\sim 10^{-20}$ around $10$ MHz.
