CN-122000690-A - Continuous phase adjustable interconnection reconfigurable intelligent surface unit structure based on paired grouping

CN122000690ACN 122000690 ACN122000690 ACN 122000690ACN-122000690-A

Abstract

The invention discloses a pair-grouping-based continuous phase adjustable interconnection reconfigurable intelligent surface unit structure, and also discloses a reconfigurable intelligent surface array and an array system adopting the unit structure. The unit structure comprises a radiation unit group and a power distribution and interconnection network module, wherein the radiation unit group at least comprises two radiation units, each radiation unit is connected with a corresponding phase regulation branch, each phase regulation branch is provided with at least two cascaded phase shifter modules, each phase shifter module comprises a radio frequency transmission component and a grounding branch with an equivalent control switch, and the power distribution and interconnection network module is connected with each phase regulation branch and establishes a definite amplitude and phase coupling relation so that the equivalent reflection phase of the radiation unit group is continuously adjustable. The invention effectively improves the phase resolution, enhances the degree of freedom of regulation and control, has easily-expanded unit structure and strong engineering realization property, and can improve the unit response consistency problem of a large-scale array.

Inventors

WAN JUN
LI XINRAN

Assignees

蓝箭鸿擎(雄安)空间科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260313

Claims (10)

1. A pair-wise grouping based continuous phase-tunable interconnect reconfigurable smart surface cell structure comprising: A radiation unit group comprising at least two radiation units, each of which is connected with a corresponding phase regulation branch, each phase regulation branch is provided with at least two phase shifter modules, and A power distribution and interconnection network module configured to connect phase regulation branches corresponding to respective ones of the radiating elements of the set of radiating elements and to establish a determined amplitude and phase coupling relationship between the radiating elements such that an equivalent reflection phase of the set of radiating elements is continuously adjustable.
2. The cell structure according to claim 1, characterized in that the cell structure comprises: The first radiation unit and the second radiation unit are respectively connected with a first phase regulation branch and a second phase regulation branch, wherein the first phase regulation branch is provided with a first phase shifter module and a second phase shifter module, the second phase regulation branch is provided with a third phase shifter module and a fourth phase shifter module, and And the power distribution and interconnection network module is respectively connected with the first phase regulation branch and the second phase regulation branch.
3. The cell structure according to claim 1 or 2, wherein the phase shifter module includes: a radio frequency transmission component configured to transmit radio frequency signals, and At least two ground branches configured to introduce a phase offset in the phase shifter module.
4. A unit structure according to claim 3, wherein each of said grounding branches is provided with an equivalent control switch for controlling the grounding state of said grounding branch.
5. The cell structure of claim 4, wherein the equivalent control switch controls an equivalent loading state of the ground branch by turning on and/or off to introduce a corresponding phase offset at the phase shifter module.
6. The cell structure of claim 1, wherein the at least two phase shifter modules are arranged in cascade on the phase regulation branch.
7. The cell structure of claim 1, wherein the power distribution and interconnection network module comprises: a power distribution network module configured to distribute radio frequency power of a phase regulation branch corresponding to any one of the radiation units in the radiation unit group to the phase regulation branches corresponding to the other radiation units according to a preset proportion, and And the power combining network module is configured to combine and transmit the radio frequency power of each phase regulation branch in the radiation unit group according to a preset rule.
8. The cell structure of claim 7, wherein the power distribution and interconnection network module establishes a determined magnitude and phase coupling relationship for each of the phase regulation branches through cooperation of the power distribution network module and the power combining network module.
9. A reconfigurable intelligent surface array comprising a plurality of cell structures according to any one of claims 1-8 arranged in an array.
10. A reconfigurable intelligent surface array system, comprising: the reconfigurable intelligent surface array of claim 9, and And the control module is configured to control the working state of each phase shifter module in the unit structure at different positions in the reconfigurable intelligent surface array so as to adjust the equivalent phase of each phase regulating branch.

Description

Continuous phase adjustable interconnection reconfigurable intelligent surface unit structure based on paired grouping Technical Field The invention relates to the technical field of wireless communication and electromagnetic wave regulation and control, in particular to a continuous phase adjustable interconnection reconfigurable intelligent surface unit structure based on paired grouping. Background The reconfigurable intelligent surface (Reconfigurable Intelligent Surface, RIS) is a core product of combining an electromagnetic super-surface technology and a wireless communication technology, and is composed of a large number of periodically arranged unit structures. The existing RIS unit commonly adopts a mode of loading a switching device, switching a branch or discrete multi-state network to realize phase adjustment, and although the basic phase adjustment requirement can be met, a plurality of technical defects still exist in practical application. Most of the existing structures rely on a small amount of discrete phase states to realize regulation and control, have limited phase resolution, easily cause obvious phase quantization errors in the beam forming process, and seriously affect beam gain, sidelobe suppression and signal coverage effects. The common reconfigurable intelligent surface unit takes independent operation of units as a main form, a circuit-level interconnection structure and a power cooperative mechanism are lacked among the units, the degree of freedom of overall regulation and control is limited, and finer-granularity phase synthesis is difficult to realize at a hardware level. In addition, part of the technical schemes are to increase the phase bit number to increase the phase state, and the number of branches, the number of devices and the complexity of a bias network are required to be increased. Meanwhile, the discretization of the device, the deviation in the process and the parasitic effect introduced by the bias network can cause inconsistent electromagnetic response of each unit in the large-scale RIS array, thereby greatly reducing the controllability of system-level performance and limiting the engineering scale expansion of the RIS array. Therefore, a new RIS unit structure is needed to improve the phase resolution and enhance the co-regulation capability between units in a hardware structure, and is easy to be engineering realized and scale-expanded, so as to solve the technical problems of obvious phase quantization error, insufficient degree of freedom of regulation, high complex loss of structure and poor consistency and controllability in large-scale array application of the existing RIS unit structure. Disclosure of Invention Starting from the prior art, the task of the invention is to provide a continuous phase adjustable interconnection reconfigurable intelligent surface unit structure based on paired grouping, which can effectively solve the technical problems of obvious phase quantization error, insufficient cooperative regulation and control capability, high structure complexity loss and poor large-scale array application consistency of the RIS unit structure in the prior art, and improve the overall performance of the RIS unit structure. In a first aspect of the invention, there is provided a pair-wise grouping based continuous phase-tunable interconnect reconfigurable smart surface cell structure comprising: A radiation unit group comprising at least two radiation units, each of which is connected with a corresponding phase regulation branch, each phase regulation branch is provided with at least two phase shifter modules, and A power distribution and interconnection network module configured to connect phase regulation branches corresponding to respective ones of the radiating elements of the set of radiating elements and to establish a determined amplitude and phase coupling relationship between the radiating elements such that an equivalent reflection phase of the set of radiating elements is continuously adjustable. Further, the unit structure includes: The first radiation unit and the second radiation unit are respectively connected with a first phase regulation branch and a second phase regulation branch, wherein the first phase regulation branch is provided with a first phase shifter module and a second phase shifter module, the second phase regulation branch is provided with a third phase shifter module and a fourth phase shifter module, and And the power distribution and interconnection network module is respectively connected with the first phase regulation branch and the second phase regulation branch. Further, the phase shifter module includes: a radio frequency transmission component configured to transmit radio frequency signals, and At least two ground branches configured to introduce a phase offset in the phase shifter module. Further, an equivalent control switch is arranged on each grounding branch and used for controlling the grounding st