Coplanar dual-polarized antenna

Abstract

This invention provides a coplanar dual-polarized antenna disposed on one side surface of a substrate. The antenna includes a first dipole antenna, a second dipole antenna arranged adjacent to and orthogonally to one side of the first dipole antenna, a first feed element disposed within the first dipole antenna, and a second feed element disposed within the second dipole antenna. Thus, the second dipole antenna and the first dipole antenna form a coplanar and orthogonally arranged configuration, and the distance from the center point of the second dipole antenna to one end of the first dipole antenna is the effective electrical length of the corresponding antenna, which is 0.1 to 0.4 times the operating wavelength (λ0). This effectively shortens the antenna spacing, achieves the purpose of structural miniaturization, and simultaneously improves the overall performance.

Claims

1. A coplanar dual-polarized antenna, disposed on one side surface of a substrate, comprising: A first dipole antenna includes: a first radiating portion; a second radiating portion adjacent to the first radiating portion and having an outer contour mirror-symmetrical to the first radiating portion; a first depletion region disposed within the first radiating portion; and a second depletion region disposed within the second radiating portion and not connected to the first depletion region; and a second dipole antenna, adjacent to and spaced apart from one side of the first dipole antenna, including: a third radiating portion having a configuration substantially the same as the first radiating portion; a fourth radiating portion adjacent to and mirror-symmetrical to the third radiating portion; a third depletion region disposed within the third radiating portion; and a fourth depletion region disposed within the fourth radiating portion and not connected to the third depletion region; wherein the arrangement direction of the third radiating portion and the fourth radiating portion is orthogonal to the arrangement direction of the first radiating portion and the second radiating portion, and the first radiating portion, the second radiating portion, the third radiating portion, and the fourth radiating portion each include: a first straight side; A second straight edge is disposed on the opposite side of the first straight edge; a third straight edge has its two ends directly or indirectly connected to the corresponding first straight edge and the second straight edge; and a fourth straight edge is disposed on the opposite side of the third straight edge, with its two ends directly or indirectly connected to the first straight edge and the second straight edge; wherein, the first straight edge of the first radiating portion is relative to the first straight edge of the second radiating portion; the first straight edge of the third radiating portion is relative to the first straight edge of the fourth radiating portion, and the first straight edge, the second straight edge, the third straight edge, and the fourth straight edge have different lengths.

2. A coplanar dual-polarized antenna, disposed on one side surface of a substrate, comprising: A first dipole antenna includes: a first radiating portion; a second radiating portion adjacent to the first radiating portion and having an outer contour mirror-symmetrical to the first radiating portion; a first depletion region disposed within the first radiating portion; and a second depletion region disposed within the second radiating portion and not connected to the first depletion region; and a second dipole antenna, adjacent to and spaced apart from one side of the first dipole antenna, including: a third radiating portion having a configuration substantially the same as the first radiating portion; a fourth radiating portion adjacent to and mirror-symmetrical to the third radiating portion; a third depletion region disposed within the third radiating portion; and a fourth depletion region disposed within the fourth radiating portion and not connected to the third depletion region; wherein the arrangement direction of the third radiating portion and the fourth radiating portion is orthogonal to the arrangement direction of the first radiating portion and the second radiating portion, and the first radiating portion, the second radiating portion, the third radiating portion, and the fourth radiating portion each include: a first straight side; A second straight edge is disposed on the opposite side of the first straight edge; a third straight edge has its two ends directly or indirectly connected to the corresponding first straight edge and the second straight edge; and a fourth straight edge is disposed on the opposite side of the third straight edge, with its two ends directly or indirectly connected to the first straight edge and the second straight edge; wherein, the first straight edge of the first radiating portion is relative to the first straight edge of the second radiating portion; the first straight edge of the third radiating portion is relative to the first straight edge of the fourth radiating portion, and the first radiating portion further includes: a first inclined edge, with its two ends connected to the first straight edge and the third straight edge; a second inclined edge, with its two ends connected to the first straight edge and the fourth straight edge; a third inclined edge, with its two ends connected to the second straight edge and the third straight edge; and a fourth inclined edge, with its two ends connected to the second straight edge and the fourth straight edge; wherein, the first inclined edge, the second inclined edge, the third inclined edge, and the fourth inclined edge each have different lengths.

3. The coplanar dual-polarized antenna as described in claim 2, wherein, The first, second, third, and fourth inclined sides are all set at a 45-degree angle.

4. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The first vacancy region has a rectangular configuration and includes: two first long sides, which are arranged opposite to each other and respectively correspond to the third and fourth straight sides of the first radiating portion; and two first short sides, which are arranged opposite to each other and respectively correspond to the first straight side and the second straight side of the first radiating portion; The second vacancy region has a rectangular configuration and includes: two second long sides, which are arranged opposite to each other and respectively correspond to the third and fourth straight sides of the second radiating portion; and two second short sides, which are arranged opposite to each other and respectively correspond to the first straight side and the second straight side of the second radiating portion; wherein the first vacancy region is formed by the alternating connection of each of the first long sides and each of the first short sides; the second vacancy region is formed by the alternating connection of each of the second long sides and each of the second short sides, so that the first vacancy region and the second vacancy region have the same or different areas.

5. The coplanar dual-polarized antenna as described in claim 4, wherein, The configuration of the third vacancy region is substantially the same as that of the first vacancy region; the configuration of the fourth vacancy region is substantially the same as that of the second vacancy region.

6. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The third radiating portion and the fourth radiating portion each further include a protrusion, which extends outward from the position of the second straight edge of the third radiating portion and the position of the second straight edge of the fourth radiating portion.

7. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The center of the second dipole antenna is defined by an electrically effective distance from one end of the adjacent first dipole antenna, the distance being between 0.1 and 0.4 times the operating wavelength (λ0).

8. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The center of the second dipole antenna is defined by an electrically effective distance from one end of the adjacent first dipole antenna, the distance being 0.2 times the operating wavelength (λ0).

9. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The first dipole antenna further includes: a first feed unit located at an adjacent position between the first radiating portion and the second radiating portion, formed by extending the conductive circuit of the substrate to the first radiating portion and the second radiating portion; the second dipole antenna further includes: a second feed unit located at an adjacent position between the third radiating portion and the fourth radiating portion, formed by extending the conductive circuit of the substrate to the third radiating portion and the fourth radiating portion.

10. The coplanar dual-polarized antenna as described in claim 1 or 2, wherein, The first dipole antenna and the second dipole antenna are arranged in a figure-eight shape.

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