Array antenna and man-machine interaction apparatus
View Patent ↗An array antenna includes M number of first array elements, N number of second array elements, at least one first link and at least one second link, where M≥2, and/or N≥2, and both of M and N are positive integers; where in a case where M≥2, at least two of the M number of first array elements are connected to corresponding first switch units, respectively; and at least two of the first array elements electrically connected to the first switch units are electrically connected to a same first link; and/or in a case where N≥2, at least two of the N number of second array elements are connected to corresponding second switch units, respectively; and at least two of the second array elements electrically connected to the second switch units are electrically connected to a same second link.
1 . An array antenna, comprising M number of first array elements, N number of second array elements, at least one first link and at least one second link, wherein both of M and N are positive integers; wherein
M≥2, at least two of the M number of first array elements are connected to corresponding first switch units, respectively; and at least two of the first array elements electrically connected to the first switch units are electrically connected to a same first link; and
N≥2, at least two of the N number of second array elements are connected to corresponding second switch units, respectively; and at least two of the second array elements electrically connected to the second switch units are electrically connected to a same second link,
wherein N=2k, and k≥1, k is an integer, every two of the N number of second array elements are electrically connected to a corresponding one of the at least one second link, the second array elements connected to different second links are different, and a corresponding one of the second switch units is electrically connected between each of the N number of second array elements and the second link,
wherein the N number of second array elements are sequentially arranged along a first direction from a 1st one to an Nth one; and an ith second array element and an (i+N/2)th second array element are electrically connected to a same second link, where i is an integer in a range from 1 to N/2.
2 . The array antenna according to claim 1 , wherein all of the M number of first array elements are electrically connected to a same first link, and a corresponding one of the first switch units is electrically connected between each of the M number of first array elements and the first link.
3 . The array antenna according to claim 1 , wherein the first switch units and the second switch units each comprise any one of a thin film transistor, a micro-electro mechanical system switch, or a photodiode.
4 . The array antenna according to claim 1 , wherein the first array elements and the second array elements each comprise a radiation patch or a dipole.
5 . A man-machine interaction apparatus, comprising the array antenna according to claim 1 .
6 . The man-machine interaction apparatus according to claim 5 , further comprising:
a data processing module configured to determine a human body action and a corresponding control instruction according to a radar signal transmitted by the array antenna and an echo signal received, and to output the control instruction; and
a display module configured to display the determined human body action or the control instruction.
7 . The man-machine interaction apparatus according to claim 6 , wherein the display module comprises a display device, and the array antenna is integrated in the display device.
8 . The man-machine interaction apparatus according to claim 7 , wherein the display device has a display area and a peripheral area surrounding the display area; and the array antenna is integrated in the peripheral area.
9 . The man-machine interaction apparatus according to claim 8 , wherein the peripheral area comprises a first area and a second area opposite to each other along a first direction, and a third area and a fourth area opposite to each other along a second direction; the M number of first array elements are in the first area and arranged side by side along the second direction; and the N number of second array elements are in the third area and arranged side by side along the first direction.
10 . The man-machine interaction apparatus according to claim 8 , wherein the peripheral area comprises a first area and a second area opposite to each other along a first direction, and a third area and a fourth area opposite to each other along a second direction; the first area and the second area are both provided with the first array elements, and the third area and the fourth area are both provided with the second array elements.
11 . The man-machine interaction apparatus according to claim 7 , wherein the display device has a display area and a peripheral area surrounding the display area; the array antenna comprises a metal mesh structure; and the array antenna is in the display area.
12 . The man-machine interaction apparatus according to claim 6 , wherein the data processing module comprises a first processing core and a second processing core;
the first processing core is configured to perform analysis operations according to a signal obtained by mixing the radar signal and the echo signal, and generate information of reflecting object, wherein the analysis operations comprise at least one of one-dimensional Fourier transform, two-dimensional Fourier transform, and angle-of-arrival calculation; and
the second processing core is configured to perform chirp control on the radar signal, pre-train and generate a human body action recognition network, recognize the human body action through the human body action recognition network according to the information of reflecting object, and determine the corresponding control instruction.
13 . The man-machine interaction apparatus according to claim 6 , wherein the data processing module comprises a low noise amplifier, a mixer, an intermediate frequency amplifier, an analog-to-digital converter, a digital front end component, a buffer, a power amplifier, a power divider and a waveform generator;
the low noise amplifier, the mixer, the intermediate frequency amplifier, the analog-to-digital converter, the digital front end component and the buffer are sequentially connected together;
the waveform generator, the power divider and the power amplifier are sequentially connected together; and
an input terminal of the mixer is further connected to the power divider, an input terminal of the low noise amplifier is connected to the array antenna, and an output terminal of the power amplifier is connected to the array antenna.
14 . The man-machine interaction apparatus according to claim 6 , further comprising a printed circuit board, wherein the first link and the second link are bonded to the printed circuit board.
15 . The man-machine interaction apparatus according to claim 14 , wherein the printed circuit board comprises a first printed circuit and a second printed circuit board; the first link is bonded and connected to the first printed circuit board; and the second link is bonded and connected to the second printed circuit board.
16 . The man-machine interaction apparatus according to claim 14 , wherein the man-machine interaction apparatus comprises any one of smart home device, vehicle-mounted device, health monitoring device and consumer electronics device.