This paper presents a new K-band surface wave launcher (SWL) engineered to overcome the conventional challenges of bandwidth and integration in microwave circuits. The design features a fully integrated, planar structure with a novel via perimeter for interference shielding, built on a single-layer Rogers RO3210 substrate. It incorporates a grounded coplanar waveguide (GCPW) line, substrate-integrated waveguide (SIW) structures and transitions, and a multi-slot configuration for mode conversion. Simulation results show the SWL's broad impedance bandwidth of 56%, spanning nearly the full K-band range, and its capability for low-leakage power radiation. The design's scalability and integration potential with various circuit components position it as an advantageous solution for modern high-frequency system designs.