| 摘要 |
PROBLEM TO BE SOLVED: To satisfy low reflection characteristics and high permeation characteristics with good reproducibility, even in an actual case where the arrangement accuracy of the pattern of a dielectric substrate and the location accuracy between the pattern of a dielectric substrate and a waveguide are assumed low, in a waveguide/transmission line converter using a high frequency band of milli-wave zone, or the like.SOLUTION: In a patch antenna, broadband is applied by disposing a parasitic element in the vicinity of a patch element. More specifically, in a waveguide/transmission line converter 2, broadband is attained by disposing a passive element 29 on a layer in the vicinity of a matching element 28 and different therefrom in the waveguide direction, and low reflection characteristics and high permeation characteristics can be satisfied with good reproducibility, even in an actual case where the arrangement accuracy of the pattern of first and second dielectric substrates 23, 24 and the location accuracy between the pattern of the first and second dielectric substrates 23, 24 and a waveguide 21 are assumed low.SELECTED DRAWING: Figure 3 |
