Primary radiator having excellent assembly workability

摘要: A primary radiator including a waveguide formed by winding metallic plate into cylindrical shape and superimposing both ends thereof at joining portion. Two first flat portions two second portions, extending in the direction of central axis waveguide, are so that portion alternate intervals substantially 90 degrees, thereby forming total four portions. dielectric feeder includes section, an impedance converting phase section. By inserting inside side surfaces section press-fitted/secured to mounting outer peripheral surface intersects angle approximately 45 degrees probe protruding from waveguide.