| 摘要 |
PROBLEM TO BE SOLVED: To provide the primary radiator shared by two frequencies that sends/ receives a signal efficiently while sharing two frequencies and two polarized waves. SOLUTION: A circular waveguide 4 is placed on an inner coaxis of a circular waveguide 3 to form a coaxial waveguide. The circular waveguide 3 through which an fL signal passes acts like an external conductor of a circular waveguide and the circular waveguide 4 through which an fH signal passes acts like a center conductor of the circular waveguide. fL Feeding sections 5V, 5H are provided to pass through the circular waveguide 3. An fH feeding section 6V is provided to pass through the circular waveguides 3, 4. The interval between the fL feeding section 5V and the fH feeding part 6V and the interval between the fL feeding section 5H and the fH feeding section 6H are about 1/4 wavelength of the fL signal. Furthermore, the interval between the fH feeding section 6V and a reflection face 7 is about 1/4 wavelength. Moreover, a reflection rod is placed in the circular waveguide 4 and formed at a position by about 1/4 wavelength from the fH feeding section 6H toward the reflecting face 7. |
