[Ukrainian Nat. Acad. Sci IEEE MTT/ED/AP West Ukraine Chapter. DIPED - 97 Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory - Lviv, Ukraine (15-17 Sept. 1997)] IEEE MTT/ED/AP West Ukraine Chapter DIPED - 97. Direct and Inverse Problems of Electromagnetic and Acoustic Theory (IEEE Cat. No.97TH8343) - Synthesis of surface wave antennas in the impedance approximation