| 摘要 |
The present disclosure discloses an ultra-wideband miniaturized crossed circularly-polarized antenna, comprising a plurality of radiation sheets, a substrate, a reflecting plate and a phase shifting 90-degree equal power divider, all of which are disposed in order. The front side of the substrate faces the radiation sheets and is provided with an excitation slot. The back side of the substrate faces the reflecting plate and is provided with a first power divider and two first transmission lines, as well as a second power divider and two second transmission lines. Input ends of the first power divider and the second power divider are connected to two input ends of the phase shifting 90-degree equal power divider, respectively. The two first transmission lines and the two second transmission lines orthogonally intersect with the excitation slot and are connected to a metal surface of the front side of the substrate, respectively. The ultra-wideband miniaturized crossed circularly-polarized antenna is provided with multiple layers of radiation sheets different in size and corresponding to different frequency bands to achieve the effect of expanding the frequency band. In addition, conversion between crossed circular polarization and linear polarization is realized by means of the phase shifting 90-degree equal power divider. |
| 主权项 |
1. An ultra-wideband miniaturized crossed circularly-polarized antenna, comprising a plurality of radiation sheets, a substrate, a reflecting plate and a phase shifting 90-degree equal power divider, all of which are disposed in order;
wherein a front side of the substrate faces the radiation sheets and is provided with an excitation slot; a back side of the substrate faces the reflecting plate and is provided with a first power divider and two first transmission lines, as well as a second power divider and two second transmission lines; the first transmission line and the second transmission line are transmission lines of two crossed linearly-polarized antennas polarized orthogonally, respectively; the two first transmission lines are connected to two output ends of the first power divider, respectively, and the two second transmission lines are connected to two output ends of the second power divider, respectively; input ends of the first power divider and the second power divider are connected to two input ends of the phase shifting 90-degree equal power divider, respectively; the two first transmission lines and the two second transmission lines orthogonally intersect with the excitation slot and are connected to a metal surface of the front side of the substrate, respectively, and four orthogonal points at which the transmission lines orthogonally intersect with the excitation slot are distributed symmetrically; the plurality of radiation sheets are circular radiation sheets disposed in parallel to one another, and as distances of the radiation sheets away from the substrate become bigger, diameters of the radiation sheets become smaller. |
