Intelligent metasurface based on latch and control method and controller thereof

A control method and metasurface technology, applied in antennas, electrical components, etc., can solve the problems of high hardware cost, increase of controller, increase of cost, etc., and achieve the effect of reducing control cost, fast response and low cost

CN113206391AInactive Publication Date: 2021-08-03HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an intelligent metasurface based on a latch, a control method of the intelligent metasurface and a controller, and belongs to the field of wireless communication. The structure of the control circuit board is improved, the improved control circuit board comprises a scanning line driving circuit and a plurality of latches, the scanning line driving circuit is used for gating the latches according to scanning signals after receiving the scanning signals sent by the controller, and the latches are used for outputting level signals to be loaded on the corresponding RIS units when being gated, and when the gate is not gated, keeping the latch state. The latch can stably latch the signal characteristic for a long time, the RIS unit is gated to correspond to the latch, the working state of the intelligent metasurface reflection unit is controlled, and due to the fact that the latch is small in area, high in speed and low in cost, the number of gates needed for completing the same function is smaller than that of a trigger, the intelligent metasurface is higher in integration degree, smaller in size and faster in response. Limited pins of the scanning drive circuit are connected with the controller, so that the controller with few IO ports can be selected, and the control cost is reduced.
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Description

technical field

[0001] The invention belongs to the field of wireless communication, and more specifically relates to a latch-based intelligent metasurface, a control method thereof, and a controller. Background technique

[0002] Intelligent metasurface (Intelligent reflective surface, RIS, Large Intelligent Surface, Reconfigurable Intelligent Surface, Software Defined Surface, Metasurface, IRS, IntelligentReflecting Surface, Reconfigurable Meta-Surfaces, Holographic MIMO, etc., hereinafter are all expressed in RIS) is an auxiliary communication system, It uses the reflection unit on it to change the phase or amplitude of the electromagnetic wave incident on the surface. Through the joint action of a large number of reflection units, the directional reflection of the electromagnetic wave can be realized, so that the base station signal can reach the user by bypassing obstacles.

[0003] Such as figure 1 As shown, the symbol θ in each unit n (n=1,2,...,N) represent the pha...

Examples

Embodiment 1

[0082] Such as figure 2 As shown, this embodiment uses the row scanning method. A latch T1 is used in each RIS unit to control the logic level of the RIS. The basic structure of a RIS unit and latch is as follows image 3 As shown, the power and ground pins of the latch have been omitted, the IN pin is connected to the signal line Sj (digital signal), the LE pin is connected to Gi (digital signal), and the OUT pin is connected to the RIS unit (logic level ). Latch Enable (LE) Input High, Output OUT Follows Data Input IN. When LE is low, the output OUT latches at the logic level set at the input.

[0083]The smart metasurface array is controlled by 1 bit. In this embodiment, the smart metasurface has n rows and m columns of RIS units. The controller sends a scan signal to the scan line drive circuit, and the scan line drive circuit gates a certain row of RIS units (in the figure G1, G2, G3, ..., Gn-1, Gn), and then, the controller sends the control signal of this line of ...

Embodiment 2

[0089] Such as Figure 4 As shown, this embodiment uses the column scan mode. At this time, each row is connected to the signal line driving circuit, and each column is connected to the scanning line driving circuit. The smart metasurface shown is still n rows and m columns, and the connection mode of the latches, scanning lines, and signal line driving circuits does not change. Change, that is: the scan line is still connected to the LE pin of the latch, and the signal line is still connected to the input pin of the latch.