| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antenna device for orthogonal polarization, which enables impedance matching of two power feed circuit parts and an antenna part, with an interval along the direction of a tube axis between two power feed probes being an arbitrary interval.SOLUTION: An antenna device is provided with a short circuit waveguide tube part, a double ridge waveguide tube part, and a quad ridge waveguide part such that they communicate with each other. Additionally, the double ridge waveguide tube part is provided with a first power feed probe 5, and a quad ridge waveguide part is provided with a second power feed probe 6. Furthermore, the double ridge waveguide tube part is set such that a critical frequency in a propagation mode for a second electric wave input from the second power feed probe 6 and configured to propagate the quad ridge waveguide tube part is higher than the frequency of the second electric wave. Thus, even when the length of the double ridge waveguide tube part in the tube axial direction is increased, a first power feed circuit part 200, second power feed circuit part 300, and an antenna part 100 can be matched in impedance.</p> |
