[en] The effect of wall corrugations on lower-hybrid-wave launching and reflection is considered and applied to the Alcator C 4.6-GHz RF experiment. A method of treating the effect of wall corrugations on wave launching is outlined. Using this formulism it is shown that placing four wall corrugations on each side of the Alcator C lower-hybrid-waveguide array increases its utility for current drive by better defining its low-n_z power spectrum. A method of calculating the effect of bellows on the reflection of lower-hybrid waves is also presented. This technique is applied to Alcator C to show that lower-hybrid waves having k_ko < 4 ß/c can have a significant fraction of their RF power shifted to k_zo +- 2π/d upon reflection, where d is the bellows spatial period. Furthermore, the shape of the incident RF power spectrum for k_zo < 2 ß/c is distorted upon reflection. This effect can fundamentally modify wave trajectories that involve wall reflection