This paper introduces an innovative structural modification designed to mitigate phase noise in a cross-coupled LC oscillator. The proposed architecture not only reduces phase noise but also elevates the output oscillation frequency. The key mechanism for phase noise reduction lies in the current shaping of switch transistors. This involves minimizing the conduction angle of these transistors precisely at the zero-crossing points of the output oscillation. The oscillator operates within the C-band frequency range at 4.02 GHz. At a 100 KHz offset, the phase noise is measured at -111.25 dBc/Hz, and at a 1 MHz offset, it reaches -132.16 dBc/Hz. Simulations were conducted using Cadence software, implemented in TSMC_0.18μm_RF CMOS technology with a 1.8V supply voltage. The oscillation exhibits a peak-to-peak voltage of 2.26V, accompanied by a power consumption of 4.11mW.