  Leveraging advancements in cavity optomechanics, we explore Optomechanically
Induced Transparency/Absorption (OMIT/OMIA) in the microwave domain at ambient
temperature. Contrary to previous works employing cryogenic temperatures, this
work exploits a 3D microwave cavity architecture to observe these effects at
ambient temperature, broadening the scope of possible applications. The work
successfully enhances the optomechanical coupling strength, enabling observable
and robust OMIT/OMIA effects, and demonstrating up to 25 dB in signal
amplification and 20 dB in attenuation. Operating in the unresolved sideband
regime enables tunability across a wider frequency range, enhancing the
system's applicability in signal processing and sensing. The findings herein
highlight the potential of optomechanical systems, presenting a simplified,
cost-effective, and more feasible approach for applications at ambient
temperature.
