In this work, we investigate tunable microwave surface lattice resonances (SLRs) in periodic arrays of finite-height plasma cylinders. The SLR arises from the coupling between the localized dipolar resonance of an individual plasma cylinder and the Rayleigh anomaly (RA) of the array. By combining the coupled-dipole approximation with full-wave simulations, we clarify the distinct roles of plasma frequency and collision frequency in controlling the collective resonance. Plasma frequency tuning mainly shifts the localized cylinder resonance and modifies the detuning between the localized surface plasmon resonance and the RA, thereby affecting the real-part matching, spectral position, and quality factor of the SLR. In contrast, collision frequency tuning primarily increases the dissipative part of the single-element response and transfers microscopic collision damping to the collective linewidth, with $Q^{-1}$ increasing approximately linearly with collision frequency over the investigated range. These results connect tunable plasma dispersion and loss to the spectral position and linewidth of the collective SLR and offer a physical basis for active tuning of microwave lattice resonances through plasma parameters.

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• Optical & microwave phenomena
• Surface plasmons
• Low-temperature plasma
• Metamaterials