Dual-polarized antenna
In a multilayer substrate ( 2 ), an internal ground layer ( 11 ) is provided at a position between insulating layers ( 4 ) and ( 5 ) and a radiating element ( 13 ) is provided at a position between insulating layers ( 3 ) and ( 4 ). A first coplanar line ( 7 ) is connected to an intermediate position of the radiating element ( 13 ) in an X-axis direction, and a second coplanar line ( 9 ) is connected to an intermediate position of the radiating element ( 13 ) in a Y-axis direction. A passive element ( 16 ) is laminated on the upper surface of the radiating element ( 13 ) through the insulating layer ( 3 ). The passive element ( 16 ) is formed in a cross shape in which a first patch ( 16 A) extending in the X-axis direction and a second patch ( 16 B) extending in the Y-axis direction are orthogonal to each other.
1. A dual-polarized antenna comprising:
an internal ground layer;
a radiating element laminated on an upper surface of the internal ground layer through an insulating layer;
a passive element laminated on an upper surface of the radiating element through an insulating layer, wherein the passive element comprises a first patch and a second patch and the first patch intersects with the second patch, and
a first feeder line for feeding power to the radiating element in a direction corresponding to the first patch and a second feeder line for feeding power to the radiating element in a direction corresponding to the second patch,
wherein the first patch and the second patch are each formed with a substantially rectangular shape having two orthogonal sides,
wherein the dual-polarized antenna is configured by a multilayer substrate formed in a flat plate shape with two plate sides, each extending in a X-axis direction and a Y-axis direction,
wherein one of the two orthogonal sides of the first patch extends in the X-axis direction, and one of the two orthogonal sides of the second patch extends in the Y-axis direction, and
wherein the passive element is integrally formed in a state where center portions of the first patch and the second patch overlap with each other.
2. The dual-polarized antenna according to claim 1 ,
wherein the passive element has a cross shape in which the first patch and the second patch are orthogonal to each other.
3. The dual-polarized antenna according to claim 1 ,
wherein each of the first feeder line and the second feeder line comprises a microstrip line, a coplanar line, or a triplanar line.
4. The dual-polarized antenna according to claim 1 ,
wherein the first feeder line and the second feeder line are both provided on the internal ground layer, and extend in parallel with each other relative to a surface of the internal ground layer.
5. The dual-polarized antenna according to claim 1 ,
wherein resonant frequencies between the passive element and the radiating element are set based on length dimensions of the first patch and the second patch, and coupling quantity between the passive element and the radiating element is adjusted based on width dimensions of the first patch and the second patch.
6. The dual-polarized antenna according to claim 1 ,
wherein the first feeder line and the second feeder line are provided at a side opposite to the radiating element when seen from the internal ground layer.
7. The dual-polarized antenna according to claim 1 ,
wherein the first feeder line and the second feeder line are configured by the internal ground layer and a strip conductor provided at a side opposite to the radiating element when seen from the internal ground layer.
8. The dual-polarized antenna according to claim 1 ,
wherein when power is fed to the radiating element through the first feeder line, a first current flows through the radiating element in the X-axis direction, and when power is fed to the radiating element through the second feeder line, a second current flows through the radiating element in the Y-axis direction.
9. The dual-polarized antenna according to claim 1 ,
wherein all sides of the first patch and the second patch extend parallel to the X-axis direction or the Y-axis direction, respectively.
10. The dual-polarized antenna according to claim 1 ,
wherein the two orthogonal sides of the first patch and the second patch are each parallel to one of the two plate sides of the flat plate.