Antenna and antenna system
An antenna and an antenna system. The antenna includes: a first dielectric layer ( 1 ) having a first surface and a second surface, which are arranged opposite each other in a thickness direction thereof; a radiation patch ( 2 ), which is arranged on the first surface of the first dielectric layer; and a first electrode layer ( 3 ), which is arranged on the second surface of the first dielectric layer, and at least partially overlaps with the orthographic projection of the radiation patch on the second surface, wherein the first electrode layer has inner recesses ( 31, 32 ), and openings of the inner recesses face the radiation patch. The orthographic projection of at least part of a radiation edge of the radiation patch on the first dielectric layer at least partially overlaps with the orthographic projections of the inner recesses on the first surface.
1 . An antenna comprising:
a first dielectric layer having a first surface and a second surface arranged opposite to each other in a thickness direction of the first dielectric layer;
a radiation patch, which is arranged on the first surface of the first dielectric layer;
a first electrode layer, which is arranged on the second surface of the first dielectric layer, and at least partially overlaps with an orthographic projection of the radiation patch on the second surface;
wherein the first electrode layer has an inner recess, and openings of the inner recess face the radiation patch, and an orthographic projection of at least part of a radiation edge of the radiation patch on the first dielectric layer at least partially overlaps with an orthographic projection of the inner recess on the first surface; a depth of the inner recess is ¼ equivalent wavelength.
2 . The antenna according to claim 1 , wherein the radiation edge of the radiation patch comprises a first radiation edge and a second radiation edge extending in a first direction and arranged side by side in a second direction; the inner recess comprises a first inner recess and a second inner recess; a length direction of both the first inner recess and the second inner recess is the first direction, a width direction of both the first inner recess and the second inner recess is the second direction, and a depth direction of both the first inner recess and the second inner recess is a thickness direction of the first electrode layer; an orthographic projection of the first radiation edge on the first dielectric layer is located in an orthographic projection of the first inner recess on the first dielectric layer; an orthographic projection of the second radiation edge on the first dielectric layer is located in an orthographic projection of the second inner recess on the first dielectric layer.
3 . The antenna according to claim 2 , wherein the radiation edge of the radiation patch further comprises a third radiation edge and a fourth radiation edge extending along the second direction and arranged side by side along the first direction; the inner recess further comprises a third inner recess and a fourth inner recess; a length direction of both the third inner recess and the fourth inner recess is the second direction, a width direction of both the third inner recess and the fourth inner recess is the first direction, and a depth direction of both the third inner recess and the fourth inner recess is the thickness direction of the first electrode layer; an orthographic projection of the third radiation edge on the first dielectric layer is located in an orthographic projection of the third inner recess on the first dielectric layer; an orthographic projection of the fourth radiation edge on the first dielectric layer is located in an orthographic projection of the fourth inner recess on the first dielectric layer.
4 . The antenna according to claim 3 , wherein the first inner recess, the second inner recess, the third inner recess and the fourth inner recess are sequentially connected end to end to form a closed-loop inner recess.
5 . The antenna according to claim 3 , wherein the first inner recess, the second inner recess, the third inner recess, and the fourth inner recess are sequentially connected to form an open-loop inner recess.
6 . The antenna according to claim 5 , wherein the antenna further comprises: a feedline arranged on the first surface of the dielectric layer, the feedline is electrically connected with the radiation patch; an orthographic projection of the feedline on the first dielectric layer and an orthographic projection of the open-loop inner recess on the first dielectric layer do not overlap.
7 . The antenna according to claim 1 , wherein the radiation edge of the radiation patch comprises a first radiation edge and a second radiation edge extending in a first direction and arranged side by side in a second direction; the inner recess comprises a first inner recess and a second inner recess;
the first inner recess comprises a first main body part and a first branch part, the first main body part and the first branch part communicate with each other, and a depth direction of the first branch part is a thickness direction of the first electrode layer, and a depth direction of the first main body part is the second direction; an orthographic projection of the first radiation edge on the first dielectric layer is located in an orthographic projection of the first main body part on the first dielectric layer;
the second inner recess comprises a second main body part and a second branch part, the second main body part and the second branch part communicate with each other, and a depth direction of the second branch part is a thickness direction of the first electrode layer, and a depth direction of the second main body part is a second direction; an orthographic projection of the second radiation edge on the first dielectric layer is located in an orthographic projection of the second main body part on the first dielectric layer.
8 . The antenna according to claim 7 , wherein the first inner recess comprises two of the first branch parts and the first main body part comprises two first sub-main body parts; two of the first branch parts are arranged side by side along the first direction; depth directions of the two first sub-main body parts are both in the first direction, and both are arranged side by side along the first direction, and the orthographic projection of the first radiation edge on the first dielectric layer is located in an orthographic projection of the two first sub-main body parts on the first dielectric layer;
the second inner recess comprises two of the second branch parts, and the second main body part comprises two second sub-main body parts; two of the second branch parts are arranged side by side along the first direction; depth directions of the two second sub-main body parts are both in the first direction, and both are arranged side by side along the first direction; the orthographic projection of the second radiation edge on the first dielectric layer is located in an orthographic projection of the two second sub-main body parts on the first dielectric layer.
9 . The antenna according to claim 1 , wherein the antenna further comprises:
a second dielectric layer, wherein a blind groove is arranged on the second dielectric layer; the first electrode layer is arranged on the second dielectric layer, and the blind groove defines the inner recess.
10 . The antenna according to claim 9 , wherein the second dielectric layer has an intermediate region and a peripheral region surrounding the intermediate region; the blind groove penetrates at least part of a boundary line between the intermediate region and the peripheral region; an orthographic projection of the radiation patch on the first surface covers an orthographic projection of an intermediate region of the reference electrode on the first surface;
the first electrode layer comprises a first hollow pattern located in the intermediate region and a second hollow pattern located in the peripheral region; the radiation patch comprises a third hollow pattern.
11 . The antenna according to claim 10 , wherein orthographic projections of a hollow portion of the first hollow pattern and a hollow portion of the third hollow portion on the first surface completely overlap.
12 . The antenna according to claim 9 , wherein a bottom angle of the blind groove is between 80° to 100°.
13 . The antenna according to claim 1 , wherein dielectric material filled in the inner recess comprises any one of silicon, aluminum oxide, and ceramic.
14 . An antenna system comprising at least one antenna according to claim 1 .
15 . The antenna system according to claim 14 , further comprising:
a transceiver unit used for transmitting or receiving signals;
a radio frequency transceiver, connected with the transceiver unit, used for modulating a signal sent by the transceiver unit or for demodulating a signal received by the antenna and transmitting the signal to the transceiver unit;
a signal amplifier connected with the radio frequency transceiver and used for improving a signal-to-noise ratio of the signal output by the radio frequency transceiver or the signal received by the antenna;
a power amplifier connected with the radio frequency transceiver and used for amplifying a power of the signal output by the radio frequency transceiver or the signal received by the antenna;
a filter unit, which is connected with the signal amplifier, the power amplifier and the antenna, and is used for filtering and sending the received signal to the antenna, or filtering the signal received by the antenna.