Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/09/01 Vol. E84-BNo. 9pp. 2387-2394 Type of Manuscript: Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems) Category: Millimeter-Wave Antennas Keyword: millimeter wave, leaky-wave antenna, dielectric slab, antenna efficiency,