CN-122026131-A - Integrated antenna device and phase correction method thereof

Abstract

An integrated antenna device and a phase correction method thereof. The integrated antenna device comprises an antenna array formed by a plurality of patch antenna units and a beam forming integrated circuit. The antenna array is arranged on the first surface of the substrate. The patch antenna units are symmetrically arranged around an array center of the antenna array, and each of the patch antenna units comprises a first feeding point and a second feeding point. The beam forming integrated circuit is arranged on the second surface of the substrate and is connected with the first feeding point and the second feeding point of each patch antenna unit. The first and second feed points of each of the patch antenna elements are disposed outside of each of the patch antenna elements relative to an array center of the antenna array, and the beamformed integrated circuit overlaps with a center region of the antenna array. Therefore, the integrated antenna device is suitable for being combined into a large antenna array, and the phase error among the patch antenna units is obtained through simple calculation.

Inventors

• ZHANG SHUWEI
• WU ZHIXIAN
• ZHAN JUNCHENG
• GUO XUANHONG
• LIN XIANWU

Assignees

• 稜研科技股份有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (15)

1. 1. An integrated antenna device, comprising: an antenna array formed by a plurality of patch antenna units arranged on the first surface of the substrate, wherein the patch antenna units are symmetrically arranged around the array center of the antenna array and each of the patch antenna units comprises a first feeding point and a second feeding point, and A beam forming integrated circuit disposed on a second surface of the substrate opposite to the first surface and connecting the first feeding point and the second feeding point of each of the plurality of patch antenna units, Wherein each of the plurality of patch antenna elements comprises a first linear radiating portion having a first polarization direction and a second linear radiating portion having a second polarization direction, the first linear radiating portion comprising the first feed point and the second linear radiating portion comprising the second feed point, the first linear radiating portion extending in a direction perpendicular to the second linear radiating portion extending direction, Wherein the first and second feed points of each of the plurality of patch antenna elements are disposed outside of each of the plurality of patch antenna elements relative to an array center of the antenna array, and the beamformed integrated circuit overlaps a center region of the antenna array.
2. 2. The integrated antenna device of claim 1, wherein the plurality of patch antenna elements are arranged in a 2x2 matrix, and a distance between adjacent ones of the plurality of patch antenna elements is one-half a wavelength of an operating environment corresponding to a center frequency of an operating frequency band of the antenna array.
3. 3. The integrated antenna device of claim 1, wherein each of the plurality of patch antenna elements has a first polarization direction and a second polarization direction orthogonal to the first polarization direction, the first feed point configured to cause each of the plurality of patch antenna elements to transmit and receive according to the first polarization direction, and the second feed point configured to cause each of the plurality of patch antenna elements to transmit and receive according to the second polarization direction.
4. 4. The integrated antenna device of claim 1, wherein each of the plurality of patch antenna elements further comprises a plurality of pattern adjustment portions, the plurality of pattern adjustment portions being clover-shaped structures.
5. 5. The integrated antenna device of claim 1, wherein radio frequency signal transmission path lengths between the first plurality of feed points of the plurality of patch antenna elements to the beamformed integrated circuit are substantially equal to each other, and wherein radio frequency signal transmission paths between the second plurality of feed points of the plurality of patch antenna elements to the beamformed integrated circuit are substantially equal to each other.
6. 6. The integrated antenna device of claim 5, wherein a center of the beamformed integrated circuit is projected to an array center of the antenna array in a direction perpendicular to a surface of the second substrate.
7. 7. The integrated antenna device of claim 1, further comprising a connection configured to receive an external power source, to connect to the beamformed integrated circuit via a bus interface, and to communicate radio frequency signals with the beamformed integrated circuit.
8. 8. The integrated antenna device of claim 7, wherein the connection portion comprises a plurality of copper pillars disposed on the second substrate.
9. 9. A phase correction method of an integrated antenna device, an antenna array of the integrated antenna device comprising a first patch antenna unit, a second patch antenna unit, a third patch antenna unit, and a fourth patch antenna unit arranged in a matrix form of 2x2, the method comprising: receiving a first radio frequency signal from a far field through the first patch antenna unit and the second patch antenna unit; mixing radio frequency signals respectively generated by the first patch antenna unit and the second patch antenna unit in response to the first radio frequency signals to generate first mixed signals; Transmitting a second radio frequency signal to the far field through the first patch antenna unit and the second patch antenna unit; mixing the radio frequency signals generated by the first patch antenna unit and the second patch antenna unit reacting to the second radio frequency signal to generate a second mixed signal, and And determining a first phase error between the first patch antenna unit and the second patch antenna unit according to the amplitude ratio of the first mixed signal to the second mixed signal.
10. 10. The method of claim 9, wherein when receiving the first rf signal from the far field, the signal feed phase of the first patch antenna element and the signal feed phase of the second patch antenna element are configured to be 180 degrees apart to produce the first mixed signal corresponding to destructive interference.
11. 11. The method of claim 9, wherein when transmitting the second rf signal to the far field, the signal feed phase of the first patch antenna unit and the signal feed phase of the second patch antenna unit are configured to be different by 0 degrees to generate the second mixed signal corresponding to constructive interference.
12. 12. The method of phase correction for an integrated antenna device of claim 9, further comprising: determining a second phase error between the third patch antenna element and the fourth patch antenna element, and A third phase error between the first patch antenna element and the third patch antenna element is determined.
13. 13. The method of phase correction for an integrated antenna device of claim 12, further comprising: and performing phase compensation of the antenna array according to the first phase error, the second phase error and the third phase error.
14. 14. The method of claim 9, wherein the first rf signal comprises a first polarized signal having a first polarization direction or a second polarized signal having a second polarization direction.
15. 15. The method of claim 9, wherein the first phase error is twice the amplitude ratio of the first mixed signal to the second mixed signal.

Description

Integrated antenna device and phase correction method thereof Technical Field The present invention relates to an antenna device, and more particularly, to an integrated antenna device and a phase correction method thereof. Background Millimeter wave (MILLIMETER WAVE) generally refers to electromagnetic waves having wavelengths between 1 millimeter and 10 millimeters, corresponding to frequencies in the range of about 30GHz to 300GHz. Since millimeter waves have a higher frequency, they can provide a wider bandwidth, thereby supporting a higher data transmission rate. Millimeter wave technology has been increasingly used in a wide range of applications, which can significantly increase network capacity and speed. However, since the wavelength of millimeter waves is short, it is easily blocked and attenuated by obstacles during propagation, which makes its coverage smaller. To solve this problem, beamforming (beamforming) technology is introduced. Beamforming is a technique for controlling the direction of transmission of signals by adjusting the phase and amplitude of individual patch antenna elements in an antenna array. Beamforming can concentrate signal energy in a particular direction, thereby enhancing signal strength, reducing interference, and improving reliability and efficiency of wireless communications. An antenna array implementing beamforming may generally have a large number of patch antenna elements, and failure of any one patch antenna element or other passive component may affect the beamforming effect of the overall antenna array. If the entire antenna array is disassembled for repair due to failure of a single patch antenna unit, it is not economical in terms of repair time or repair cost. In addition, estimation and correction of phase errors between a large number of patch antenna elements is more complex and challenging. Disclosure of Invention The present invention provides an integrated antenna device and a phase correction method thereof, which can be used for solving the above technical problems. In one embodiment of the present invention, an integrated antenna device includes an antenna array formed by a plurality of patch antenna elements and a beam forming integrated circuit. The antenna array is arranged on the first surface of the substrate. The patch antenna units are symmetrically arranged around an array center of the antenna array, and each of the patch antenna units comprises a first feeding point and a second feeding point. The beam forming integrated circuit is arranged on a second surface of the substrate opposite to the first surface and is connected with a first feeding point and a second feeding point of each patch antenna unit. Each of the patch antenna elements includes a first linear radiating portion having a first polarization direction and a second linear radiating portion having a second polarization direction. The first linear radiating portion includes a first feeding point, and the second linear radiating portion includes a second feeding point. The extending direction of the first linear radiating portion is perpendicular to the extending direction of the second linear radiating portion. The first and second feed points of each of the patch antenna elements are disposed outside of each of the patch antenna elements relative to an array center of the antenna array, and the beamformed integrated circuit overlaps with a center region of the antenna array. In an embodiment of the present invention, an antenna array of the integrated antenna device includes a first patch antenna unit, a second patch antenna unit, a third patch antenna unit, and a fourth patch antenna unit arranged in a2×2 matrix. The phase correction method of the integrated antenna device comprises the following steps. And receiving a first radio frequency signal from a far field through the first patch antenna unit and the second patch antenna unit. The first patch antenna unit and the second patch antenna unit are mixed to generate radio frequency signals respectively in response to the first radio frequency signals so as to generate first mixed signals. And transmitting a second radio frequency signal to a far field through the first patch antenna unit and the second patch antenna unit. The radio frequency signals generated by the reaction of the first patch antenna unit and the second patch antenna unit are mixed to generate a second mixed signal. And determining a first phase error between the first patch antenna unit and the second patch antenna unit according to the amplitude ratio of the first mixed signal and the second mixed signal. Drawings Fig. 1 is a block diagram of an integrated antenna device according to an embodiment of the invention; fig. 2A and fig. 2B are perspective views of an integrated antenna device according to an embodiment of the invention; Fig. 3A is a schematic diagram of a plurality of patch antenna elements and feed points in accordance with an embodiment of t