A VR large space wireless transmission millimeter wave antenna array structure

Abstract

The utility model relates to wireless transmission technical field, concretely is a kind of millimeter wave antenna array structure of VR large space wireless transmission, including dielectric substrate, two millimeter wave antenna arrays are fixed with dielectric substrate front, back and millimeter wave antenna array corresponding place fixed with two signal reinforcement plate, the orthographic projection of signal reinforcement plate covers the radiation aperture of millimeter wave antenna array, signal reinforcement plate includes multiple metal plate that can be independently controlled on-off electricity. By setting up signal reinforcement plate consisting of multiple metal plate that can be independently controlled on-off, system can dynamically reconfigure the reflection phase distribution behind antenna according to head rotating direction, to " push " main lobe of radiated beam to the direction that need to be strengthened quickly. This kind of electric control adjustment mode without mechanical movement responds fast, reliability is high, can ensure that when user moves and rotates, antenna beam is always effectively pointed to base station direction, maintains the stability of link.

Description

Technical Field

[0001] This utility model relates to the field of wireless transmission technology, and in particular to a millimeter-wave antenna array structure for VR large-space wireless transmission. Background Technology

[0002] With the popularization of virtual reality technology, "VR large space" experiences that allow users to move freely within large physical spaces have become an important development direction. In such applications, VR headsets need to conduct continuous high-speed wireless data transmission with remote computing base stations, and millimeter-wave communication technology, due to its huge bandwidth resources, has become an ideal choice to achieve this goal.

[0003] However, applying millimeter-wave technology to mobile VR headsets faces significant challenges. Millimeter-wave signals are highly directional and easily attenuated by obstruction. During use, frequent head movements constantly alter the relative orientation between the headset and the base station, causing the directional antenna beam to lose its consistent alignment with the base station. This results in signal link interruptions, sharp drops in data rates, and severely disrupts the immersive experience. While existing technologies employ mechanically rotating antennas or simple antenna switch arrays to alleviate this problem to some extent, the former suffers from slow response and unreliable structure, while the latter often lacks precise beam control capabilities, making it difficult to maintain a high-quality signal connection in complex spatial environments.

[0004] Therefore, the lack of a millimeter-wave antenna structure in the existing technology that can quickly and accurately respond to head movements and dynamically adjust the beam direction to maintain a stable high-speed connection has become a key technical bottleneck restricting the improvement of VR large-space experience quality. Utility Model Content

[0005] The main objective of this invention is to provide a millimeter-wave antenna array structure for large-space wireless transmission in VR, in order to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of this utility model, a millimeter-wave antenna array structure for VR large-space wireless transmission is provided, comprising a dielectric substrate. Two millimeter-wave antenna arrays are fixedly disposed on the front side of the dielectric substrate, and two signal enhancement plates are fixedly disposed on the back side corresponding to the millimeter-wave antenna arrays. The orthographic projection of the signal enhancement plates covers the radiation aperture of the millimeter-wave antenna arrays. The signal enhancement plates include multiple independently controllable metal plates. When the metal plates are energized, the electromagnetic waves radiated to the rear by the millimeter-wave antenna arrays are reflected, and the radiated electromagnetic waves are in phase with the electromagnetic waves radiated to the front by the millimeter-wave antenna arrays. When the metal plates are de-energized, the electromagnetic waves radiated to the rear by the millimeter-wave antenna arrays pass through the metal plates.

[0007] Furthermore, the millimeter-wave antenna array is composed of several microstrip patches, which serve as basic radiating units and are fixed on a dielectric substrate.

[0008] Furthermore, the metal plate is fixedly arranged radially on the outer ring of the base, an air layer is left between the metal plate and the dielectric substrate, and the base is fixedly arranged on the bottom surface of the dielectric substrate.

[0009] Furthermore, a terminal block is fixedly provided at the outer end of the base, and the terminal block is grounded.

[0010] Furthermore, a physical gap is left between two adjacent metal plates in the same signal enhancement plate, wherein the maximum size of the physical gap is less than one-tenth of the working wavelength and the minimum size is less than one-fifteenth of the working wavelength.

[0011] Furthermore, the widest part of the metal plate is half the working wavelength, and the narrowest part is one-quarter of the working wavelength.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Rapid electronically controlled beam pointing adjustment effectively tracks user head movements: By setting up a signal enhancement plate composed of multiple independently controllable metal plates and linking it with an inertial measurement unit (IMU), the system can dynamically reconstruct the reflected phase distribution behind the antenna according to the direction of head rotation, thereby quickly "pushing" the main lobe of the radiated beam in the direction requiring enhancement. This electronically controlled adjustment method without mechanical movement has a fast response speed and high reliability, ensuring that the antenna beam always effectively points towards the base station when the user moves and rotates, maintaining link stability.

[0014] 2. While enhancing the directional signal, it reduces radiation leakage to the head: When part of the metal plate is de-energized and floating, the backward radiation energy of the antenna in the corresponding area will penetrate and be absorbed, rather than being reflected towards the head. This controlled reflection mechanism, while concentrating energy towards the base station, actively reduces electromagnetic wave energy leaking to the user's head, helping to meet the requirements of equipment electromagnetic safety standards. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0017] Figure 3 This is a partially enlarged schematic diagram of the present invention.

[0018] Figure label:

[0019] 1. Dielectric substrate; 2. Microstrip patch; 3. Metal plate; 4. Terminal block; 5. Physical gap; 6. Base plate. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] This embodiment provides a millimeter-wave antenna array structure for large-space wireless transmission in VR. Its core lies in an antenna design with dynamically adjustable beam direction to address signal challenges caused by user head rotation. Figure 1 As shown, the main body of the antenna structure is a dielectric substrate 1. This dielectric substrate 1 preferably uses a low-loss, high-frequency circuit board material, such as the Rogers RO3003 series or liquid crystal polymer (LCP), to maintain good signal transmission efficiency in the millimeter-wave band. On the front side of the dielectric substrate 1, two millimeter-wave antenna arrays are fixedly mounted using printed circuit board technology. The positions of these two arrays roughly correspond to the area around the human eye when wearing the VR headset, and they are responsible for receiving high-speed data signals from the base station. Each millimeter-wave antenna array consists of multiple microstrip patches 2 arranged in a specific pattern as basic radiating units.

[0022] like Figure 2 As shown, a signal enhancement plate is fixedly disposed on the back side of the dielectric substrate 1, in the area directly opposite the two millimeter-wave antenna arrays. The projected area of ​​each signal enhancement plate completely covers the radiating aperture of its corresponding millimeter-wave antenna array to ensure effective control of the energy radiated backward by the array.

[0023] The signal enhancement board comprises a base 6 and multiple metal plates 3. The base 6 is fixedly mounted on the bottom surface of the dielectric substrate 1 using insulating connectors or adhesives. The multiple metal plates 3 are radially arranged around the outer ring of the base 6. A certain gap is left between the metal plates 3 and the back surface of the dielectric substrate 1, thus forming an air layer. This air layer utilizes the characteristics of air's low dielectric constant and small loss tangent to help improve the overall radiation efficiency and impedance bandwidth of the antenna.

[0024] To achieve independent control of the state of each metal plate 3, a grounded terminal 4 is fixedly installed at the outer end of the base 6, such as... Figure 3 As shown. Each metal plate 3 is connected in series with the terminal 4 via a switching element, preferably a PIN diode. By controlling the on / off state of the PIN diode, the corresponding metal plate 3 can be controlled to be in a "powered" grounded state or a "powered" floating state.

[0025] In terms of physical structure, a physical gap 5 is left between two adjacent metal plates 3 in the same signal enhancement board. The size of this physical gap 5 needs to be carefully designed. Its maximum size should be less than one-tenth of the operating wavelength, and the minimum size is determined by the manufacturing process, but electrical isolation must be ensured. This design is to ensure the independence of each metal plate 3 while avoiding excessive electromagnetic wave leakage due to excessive gaps. The shape and size of the metal plate 3 itself are also related to its electromagnetic function. Its widest part can be half the operating wavelength, and its narrowest part can be one-quarter of the operating wavelength. For example, at an operating frequency of 39 GHz (free space wavelength of approximately 7.7 mm), the characteristic dimensions of the metal plate 3 can be in the range of 1.9 mm to 3.85 mm.

[0026] The dielectric substrate 1 also integrates an inertial measurement unit (IMU) for real-time detection of the user's head posture and rotation.

[0027] The working principle of this embodiment is as follows: When the user's head is facing the base station, most or all of the metal plates 3 on the two signal enhancement boards can be in a powered-on and grounded state, forming a complete reflective surface, allowing the antenna beam to radiate in the forward direction. When the IMU detects that the user turns their head to the right, the system immediately generates a control command to forward bias and conduct the PIN diode at a specific position in the right signal enhancement board, thereby powering and grounding the metal plate 3 connected to it. These grounded metal plates 3 will reflect the electromagnetic waves radiated backward by the microstrip patch 2 above them forward in phase, enhancing the signal on that side. At the same time, some metal plates 3 in the left signal enhancement board can be controlled to be in a powered-off and floating state, allowing their corresponding backward radiated energy to penetrate and be absorbed, thereby "pushing" the energy center of the overall beam to the right, achieving a rightward deflection of the beam, and continuously tracking the direction of the base station. The control logic when turning the head to the left is symmetrical.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A millimeter-wave antenna array structure for VR large-space wireless transmission, comprising a dielectric substrate (1), characterized in that, Two millimeter-wave antenna arrays are fixedly mounted on the front side of the dielectric substrate (1), and two signal enhancement plates are fixedly mounted on the back side corresponding to the millimeter-wave antenna arrays. The orthographic projection of the signal enhancement plate covers the radiation aperture of the millimeter-wave antenna array. The signal enhancement plate includes multiple metal plates (3) that can be independently controlled to be powered on and off. When the metal plate (3) is powered on, the electromagnetic waves radiated by the millimeter-wave antenna array to the rear are reflected, and the radiated electromagnetic waves are in phase with the electromagnetic waves radiated by the millimeter-wave antenna array to the front. When the metal plate (3) is de-powered, the electromagnetic waves radiated by the millimeter-wave antenna array to the rear pass through the metal plate (3).

2. The millimeter-wave antenna array structure for VR large-space wireless transmission according to claim 1, characterized in that, The millimeter-wave antenna array is composed of several microstrip patches (2), which serve as basic radiating units and are fixed on a dielectric substrate (1).

3. The millimeter-wave antenna array structure for VR large-space wireless transmission according to claim 1, characterized in that, The metal plate (3) is fixedly arranged radially on the outer ring of the base (6), and an air layer is left between the metal plate (3) and the dielectric substrate (1). The base (6) is fixedly arranged on the bottom surface of the dielectric substrate (1).

4. The millimeter-wave antenna array structure for VR large-space wireless transmission according to claim 3, characterized in that, The base (6) is fixedly provided with a terminal block (4) at its outer end, and the terminal block (4) is grounded.

5. The millimeter-wave antenna array structure for VR large-space wireless transmission according to claim 1, characterized in that, A physical gap (5) is left between two adjacent metal plates (3) in the same signal enhancement plate. The maximum size of the physical gap (5) is less than one-tenth of the working wavelength, and the minimum size is less than one-fifteenth of the working wavelength.

6. The millimeter-wave antenna array structure for VR large-space wireless transmission according to claim 1, characterized in that, The widest part of the metal plate (3) is half the working wavelength, and the narrowest part is one-quarter of the working wavelength.

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