US-12627044-B2 - Antenna device with antenna units with phase shift units

US12627044B2US 12627044 B2US12627044 B2US 12627044B2US-12627044-B2

Abstract

Provided is an antenna device. The antenna device includes at least one antenna unit and first connection lines, where each antenna unit includes a first substrate and a second substrate, a region where the first substrate and the second substrate overlap forms a phase shift region in a thickness direction of the first substrate; the second substrate includes a first step protruding from the phase shift region in a first direction, a side of the first step close to the first substrate is provided with multiple first pads arranged in a second direction, the first pads are disposed on a side of the second substrate close to the first substrate, and the first direction intersects the second direction; and the first pads are connected to the first connection lines, and the first pads receive a drive signal output by an external driver circuit through the first connection lines.

Inventors

Qingsan ZHU
Feng Qin
Kerui XI
Zhenyu JIA
Dengming LEI
Yunfei Bai
Yi Wang

Assignees

SHANGHAI TIANMA MICROELECTRONICS CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220404
Priority Date: 20211231

Claims (14)

1 . An antenna device, comprising: a plurality of antenna units and first connection lines; wherein each of the plurality of antenna units comprises a first substrate and a second substrate disposed opposite to each other; a region where the first substrate and the second substrate overlap forms a phase shift region in a thickness direction of the first substrate; wherein each of the plurality of antenna units further comprises a plurality of phase shift units, and each of the plurality of phase shift units comprises a microstrip line disposed on a side of the second substrate close to the first substrate; the second substrate comprises a first side and a second side in the thickness direction of the first substrate, the first side of the second substrate is close to the first substrate and the second side of the second substrate is away from the first substrate; and the second substrate comprises a first step protruding from the phase shift region and extending along a first direction, the first direction is a direction parallel to a plane where the second substrate is located and perpendicular to the thickness direction of the first substrate, a side of the first step close to the first substrate is provided with a plurality of first pads arranged in a second direction, the plurality of first pads are directly disposed on the first side of the second substrate, and the first direction intersects the second direction; and wherein a first pad of the plurality of first pads is directly connected to a first connection line of the first connection lines, and the plurality of first pads are configured to receive a drive signal output by an external driver circuit through the first connection lines, and send the drive signal to the microstrip line; wherein the antenna device further comprises a plurality of binding terminals, a binding terminal of the plurality of binding terminals is connected to the first connection line of the first connection lines, and the plurality of binding terminals are configured to be connected to the external driver circuit; and wherein the antenna device further comprises a support substrate, and the plurality of binding terminals are disposed on the support substrate; and wherein the plurality of antenna units are arranged in an array to form an antenna unit array, the antenna unit array are arranged on a same side of the support substrate, the support substrate comprises a second step protruding from the antenna unit array and extending along the first direction, the second step is located outside a coverage region of a vertical projection of the antenna unit array on a plane where the support substrate is located, the second step is located at an edge of the antenna device, the plurality of binding terminals are disposed on the second step, and the plurality of binding terminals and the antenna unit array are disposed on the same side of the support substrate.
2 . The antenna device of claim 1 , wherein a length of each of the plurality of first pads in the first direction is D1, and D1≤100 μm.
3 . The antenna device of claim 1 , wherein a length of the first step in the first direction is D2, and D2≤0.2 mm.
4 . The antenna device of claim 1 , wherein the antenna device further comprises: a plurality of second pads, wherein the plurality of second pads are disposed on the support substrate, and the plurality of second pads and the antenna unit array are disposed on the same side of the support substrate; and a second pad of the plurality of second pads is connected to the first pad of the plurality of first pads through the first connection line of the first connection lines, and the binding terminal of the plurality of binding terminals is electrically connected to the second pad of the plurality of second pads.
5 . The antenna device of claim 4 , wherein the plurality of antenna units comprise a first antenna unit and a second antenna unit disposed adjacent to each other, and in the first direction, the first antenna unit is disposed on a side of the first step of the second antenna unit away from the phase shift region of the second antenna unit; and the first pad disposed on the first step of the second antenna unit is a first connection pad, and the second pad correspondingly connected to the first connection pad is disposed on a side of the first antenna unit close to the second antenna unit.
6 . The antenna device of claim 5 , wherein in a direction parallel to a plane where the support substrate is located, a shortest distance between an edge of a side of the first connection pad away from the second pad corresponding to the first connection pad and an edge of a side of the second pad away from the first connection pad corresponding to the second pad is D5, and D5≤0.3 mm.
7 . The antenna device of claim 4 , wherein a length of each of the plurality of second pads in the first direction is D4, and D4≤100 μm.
8 . The antenna device of claim 4 , wherein the first connection lines are made of at least one of gold, copper, aluminum or silver alloy.
9 . The antenna device of claim 1 , wherein the plurality of antenna units further comprises a third antenna unit disposed at an edge of the antenna unit array; the second substrate of the third antenna unit comprises a third step protruding from the phase shift region of the third antenna unit, and the third step is disposed at the edge of the antenna unit array; and the plurality of binding terminals are disposed on a side of the third step close to the first substrate; wherein the plurality of antenna units comprise a first antenna unit and a second antenna unit disposed adjacent to each other, and the first antenna unit is disposed on a side of the first step of the second antenna unit away from the phase shift region of the second antenna unit; the second substrate of the first antenna unit comprises a fourth step protruding from the phase shift region of the first antenna unit, and the fourth step is located on a side of the first antenna unit close to the second antenna unit; and wherein the antenna device further comprises: a plurality of second pads, wherein a second pad of the plurality of second pads is connected to the first pad of the plurality of first pads through the first connection line of the first connection lines, and the binding terminal of the plurality of binding terminals is electrically connected to the second pad of the plurality of second pads; and the first pad disposed on the first step of the second antenna unit is a first connection pad, and the second pad of the plurality of second pads correspondingly connected to the first connection pad is disposed on a side of the fourth step of the first antenna unit close to the first substrate of the first antenna unit.
10 . The antenna device of claim 9 , wherein in the first direction, a length of the fourth step is D3, and D3≤0.2 mm.
11 . The antenna device of claim 1 , wherein each of the plurality of antenna units further comprises a plurality of third pads, and the plurality of third pads are disposed on a side of the second substrate away from the plurality of first pads; and a third pad of the plurality of third pads is connected to the first pad of the plurality of first pads through the first connection line of the first connection lines; and wherein the antenna device further comprises: a plurality of second pads, wherein the plurality of second pads are disposed on a side of the support substrate close to the antenna unit array; and a second pad of the plurality of second pads is connected to the third pad of the plurality of third pads in each antenna unit of the plurality of antenna units, and the binding terminal of the plurality of binding terminals is electrically connected to the second pad of the plurality of second pads.
12 . The antenna device of claim 11 , wherein the second pad of the plurality of second pads is in contact connection with the third pad of the plurality of third pads.
13 . The antenna device of claim 11 , further comprising: a plurality of conductive connection structures, wherein a conductive connection structure of the conductive connection structures is connected to the second pad of the plurality of second pads and the third pad of the plurality of third pads.
14 . The antenna device of claim 1 , wherein the plurality of phase shift units are arranged in an array in the phase shift region, and the plurality of phase shift units are configured to adjust a phase of a radio frequency signal; and in the antenna device, a gap distance between adjacent phase shift units of the plurality of phase shift units is equal; wherein each of the plurality of phase shift units comprises: a ground metal layer disposed on a side of the first substrate close to the second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate; and wherein each of the plurality of antenna units further comprises a radiation electrode and a feed network, the radiation electrode is disposed on a side of the first substrate away from the second substrate, and the feed network is in coupling connection with the microstrip line.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority to Chinese Patent Application No. 202111673932.9 filed with the China National Intellectual Property Administration (CNIPA) on Dec. 31, 2021, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD Embodiments of the present disclosure relate to the technical field of communications, and in particular to an antenna device. BACKGROUND A phased array antenna is an important radio device for transmitting and receiving electromagnetic waves, and the phased array antenna controls phases of radio frequency signals of antenna units in an array antenna through a phase shifter to change a radiation direction of the antenna to achieve the purpose of beam scanning. An existing phased array antenna has the problem of large size and is not beneficial to the miniaturization application of the phased array antenna. SUMMARY The present disclosure provides an antenna device, reducing the size of the whole antenna device and achieving the miniaturization application of the antenna device. An embodiment of the present disclosure provides an antenna device. The antenna device includes an antenna unit and first connection lines, the antenna unit includes a first substrate and a second substrate disposed opposite to each other; a region where the first substrate and the second substrate overlap forms a phase shift region in a thickness direction of the first substrate; the second substrate includes a first step protruding from the phase shift region in a first direction, a side of the first step close to the first substrate is provided with multiple first pads arranged in a second direction, and the multiple first pads are disposed on a side of the second substrate close to the first substrate, and the first direction intersects the second direction; and each of the multiple first pads is connected to a respective one of the first connection lines, and the multiple first pads are configured to receive a drive signal output by an external driver circuit through the first connection lines. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a structural diagram of an antenna device according to an embodiment of the present disclosure; FIG. 2 is a cross sectional view taken along an A-A′ direction of FIG. 1; FIG. 3 is a structural diagram of an antenna device in the related art; FIG. 4 is a cross sectional view taken along a B-B′ direction of FIG. 3; FIG. 5 is a structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 6 is a cross sectional view taken along a C-C′ direction of FIG. 5; FIG. 7 is a structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 8 is a structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 9 is a partial structural diagram of an antenna device according to an embodiment of the present disclosure; FIG. 10 is a cross sectional view taken along a D-D′ direction of FIG. 9; FIG. 11 is a partial structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 12 is a cross sectional view taken along an E-E′ direction of FIG. 11; FIG. 13 is a structural diagram of a wire bond according to an embodiment of the present disclosure; FIG. 14 is a partial structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 15 is a cross sectional view taken along an F-F′ direction of FIG. 14; FIG. 16 is a partial structural diagram of another antenna device according to an embodiment of the present disclosure; FIG. 17 is a partial cross sectional view of an antenna device according to an embodiment of the present disclosure; FIG. 18 is a structural diagram of another antenna device according to an embodiment of the present disclosure; and FIG. 19 is a cross sectional view taken along a G-G′ direction of FIG. 18. DETAILED DESCRIPTION The present disclosure will be further described in detail in conjunction with the drawings and embodiments below. It should be understood that the specific embodiments described herein are merely used for explaining the present disclosure and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only part, but not all, of the structures related to the present disclosure are shown in the drawings. FIG. 1 is a structural diagram of an antenna device according to an embodiment of the present disclosure, and FIG. 2 is a cross sectional view taken along an A-A′ direction of FIG. 1. As shown in FIG. 1 and FIG. 2, the antenna device provided in the embodiment of the present disclosure includes an antenna unit 10, the antenna unit 10 includes a first substrate 11 and a second substrate 12 disposed opposite to each other, a region where the first substrate 11 and the second substrate 12 overlap forms a phase shift region 13 in a thickness