A tetra band slotted structure is designed detail analysis with compactness in dimensions $\mathbf{29}.\mathbf{5}\ \mathbf{mm} \times \mathbf{22}\ \mathbf{mm} \times \mathbf{1}.\mathbf{6}$ mm. Proposed antenna is operating at four resonant microwave frequency bands to cover the WiMAX (3.34 - 4.42 GHz), Upper C band radio telecommunication (7.20-7.43 GHz), Lower X band amateur radio application (8.91-10.72 GHz) and middle $\mathbf{K}_{\mathbf{U}}$ band molecular rotational spectroscopy (14.2514.94 GHz) wireless applications. The slotted octagonal shape radiating patch and trapezoidal shape partial ground section is implemented on FR-4 dielectric substrate material. Antenna achieve the tetra band configuration with appropriate simulated results of return loss, radiation patterns, gain and radiation efficiency. Simulated results are stable at achieved resonating modes.