Antenna structure and antenna array structure
An antenna structure includes a substrate, a plurality of reflective plates, a grounding plate, a radiating member, a signal feeding via and a plurality of conductive vias. The substrate has opposite first and second surfaces and comprises liquid crystal polymer. The reflective plates are arrayed on the first surface of the substrate. The grounding plate is disposed on the second surface of the substrate and overlapped with the reflective plates in a normal direction of the substrate. The grounding plate further includes an opening. The radiating member is disposed on the first surface of the substrate and physically separated from the reflective plates. The signal feeding via is coupled with the radiating member and penetrates through the substrate to be exposed in the opening of the grounding plate. The conductive vias penetrate through the substrate and respectively connect the reflective plates and the grounding plate.
1. An antenna structure comprising:
a substrate having opposite first surface and second surface and comprising liquid crystal polymer material;
a plurality of reflective plates disposed on the first surface of the substrate and arranged in an array;
a grounding plate disposed on the second surface of the substrate and overlapped with the reflective plates in a normal direction of the substrate, and the grounding plate includes an opening;
a first radiating member disposed on the first surface of the substrate and physically separated from the reflective plates;
a signal feeding via coupled to the first radiating member and penetrating through the substrate to be exposed in the opening of the grounding plate; and
a plurality of first conductive vias respectively coupled to the reflective plates and penetrating through the substrate to couple with the grounding plate;
wherein the substrate has a planar portion, a first bending portion and a first protrusive portion, the reflective plates are in the planar portion, and the first radiating member extending from the planar portion to the first protrusive portion through the first bending portion.
2. The antenna structure of claim 1 , wherein a radiating portion of the first radiating member is in the first protrusive portion.
3. The antenna structure of claim 1 , wherein an angle between the first protrusive portion and the planar portion is about 90-135 degrees.
4. The antenna structure of claim 1 , wherein the signal feeding via is positioned between four of the reflective plates that are arranged in two columns and two rows.
5. The antenna structure of claim 1 further comprising:
a second conductive via coupled to a grounding branch of the first radiating member and penetrating through the substrate to couple with the grounding plate.
6. The antenna structure of claim 1 , wherein a radiating branch of the first radiating member is a straight strip, a rectangular plate, a rectangular frame or a U-shaped frame.
7. The antenna structure of claim 1 , further comprising:
a second radiating member disposed on the second surface of the substrate and coupled to the grounding plate, wherein the second radiating member and the first radiating member constitute a dipole antenna.
8. The antenna structure of claim 1 , wherein each of the reflective plates is a rectangular plate, a rectangular frame, or cross-shaped.
9. The antenna structure of claim 1 , wherein the substrate further has a second bending portion and a second protrusive portion, and the grounding plate extends to the second protrusive portion through the second bending portion.
10. An antenna array structure comprising:
a substrate having opposite first surface and second surface and comprising liquid crystal polymer material;
a plurality of reflective plates disposed on the first surface of the substrate and arranged in an array;
a grounding plate disposed on the second surface of the substrate and overlapped with the reflective plates in a normal direction of the substrate, wherein the grounding plate includes a plurality of openings;
a plurality of radiating members on the first surface of the substrate and physically separated from the reflective plates, wherein the radiating members are periodically arranged in a longitudinal direction of the substrate;
a plurality of signal feeding vias respectively coupled to the radiating members and penetrating through the substrate to be exposed respectively in the openings of the grounding plate; and
a plurality of conductive vias respectively coupled to the reflective plates and penetrating through the substrate to couple with the grounding plate;
wherein the substrate has a planar portion, a bending portion and a protrusive portion, wherein the reflective plates are in the planar portion, and the radiating members extending from the planar portion to the protrusive portion through the bending portion.