| 摘要 |
PURPOSE: To provide frequency re-use capability for a dual band frequency antenna by constituting the antenna of a 4-terminal waveguide network, a feed horn and a polarizer. CONSTITUTION: A waveguide 12 has a 4-terminal waveguide network. Ports 20, 22 are used for transmitting an orthogonal linearly polarized wave signal with a 1st frequency, which is a transmission band frequency range of 4.035-4.200GHz. Other ports 24, 26 are used for receiving an orthogonal linearly polarized wave signal with a 2nd frequency, which is a reception band frequency range of 6.260-6.425GHz. The four independent linearly polarized wave signals are combined and enter a common square waveguide 12 to stimulate a quadrangular pyramid feed horn 14. A meander line polarizer 16 coupled with an opening 17 of the horn 14 convert the linearly polarized wave signals into two circularly polarized wave signals rotated opposite to each other and emits a circularly polarized wave field at a transmission band frequency from an antenna 10. Furthermore, the polarizer 16 converts the two circularly polarized wave signals rotated opposite to each other into two orthogonal linearly polarized wave signals. |
