The analysing and design ing theory of the conformal slot array on the large conducting cylinder covered by a dielectric layer is studied. The moment method is applied to solve the integral equations of the tangential fields. The concept of quasi-symmetrical array is proposed so that the order of the linear equations is reduced byhalf. The equivalent network parameters and pattern of element and array are derived. The amplitude

phase

impedance and resonance characteristics of the slot are discussed. The synthetic design method for such array is given and the computer aided analysis and design are realized. The experiments have verified some of the results.