ONE-SIDE SHORT CIRCUITED TYPE MICROSTRIP ANTENNA

PROBLEM TO BE SOLVED: To reduce the variation in power feeding positions and to uniformize characteristics by executing work for clearly indicating the power feeding position, where the central conductor of a coaxial power feeding line is fixed in a planar radial conductor plate. SOLUTION: The one-side short circuited type microstrip antenna clearly indicates in advance the power feeding position of the planar radial conductor plate 6. That is, various kinds of work such as marking-off 7, a convergence 8, a hole 9, a projection 10 and a notch 11 are executed at the position for fixing the core line of the coaxial power feeding line 3. By these kinds of work, a variety of power feeding positions, at the time of soldering the central conductor of the coaxial power feeding line 3 on the planar radial conductor plate 6, is eliminated and a variety of the center frequencies of a return loss characteristics is reduced. Therefore, the variety of the characteristic is reduced, so that the quality is stabilized. Moreover, the yield of the characteristic is improved, thereby attaining economization.