WO2021012299A1 - 用于移动传感器的双极化微带天线及其信号收发方法 - Google Patents
用于移动传感器的双极化微带天线及其信号收发方法 Download PDFInfo
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- WO2021012299A1 WO2021012299A1 PCT/CN2019/098422 CN2019098422W WO2021012299A1 WO 2021012299 A1 WO2021012299 A1 WO 2021012299A1 CN 2019098422 W CN2019098422 W CN 2019098422W WO 2021012299 A1 WO2021012299 A1 WO 2021012299A1
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- microstrip antenna
- polarized
- dielectric substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Definitions
- the present invention relates to the technical field of antennas, in particular to a dual-polarized microstrip antenna for a mobile sensor and a signal transceiving method thereof.
- Lighting, security, small household appliances and other smart homes will be equipped with antennas with microwave sensors for moving object detection.
- One is a single-antenna solution with no isolation between receiving and sending. Since the single-antenna solution is not isolated between receiving and sending, a bridge or circulator must be connected to the circuit that is used to separate the receiving and sending signals to achieve the purpose of separating and receiving signals.
- the other is a dual-antenna solution with separate transmission and reception.
- the dual-antenna solution can be directly connected to the transceiver circuit, but the unavoidable volume of the dual antenna is larger than that of the single antenna, and the corresponding cost is relatively high.
- the technical problem to be solved by the present invention is to provide a dual-polarized microstrip antenna for mobile sensors and a signal transceiving method thereof.
- the present invention directly uses a single antenna and uses two feed point ports to separately excite The two orthogonal radiation modes and the orthogonality of the eigenmodes make the two feed ports naturally isolated, and obtain the effect of separate transmission and reception.
- a dual-polarization microstrip antenna for a mobile sensor the dual-polarization microstrip antenna includes:
- the dielectric substrate is provided with two conductive metal feeding vias
- the radiating metal patch is located on a surface of the dielectric substrate.
- Two feeding ports deviating from the center of the radiating metal patch are provided on the radiating metal patch, which pass through the two conductive metal feeding vias.
- the grounded metal surface covers and closely adheres to the other surface of the dielectric substrate, and is provided with isolation regions at the positions of the two feeder ports to insulate the feeder ports from the grounded metal surface.
- the dielectric substrate is an FR4 board or a microwave dielectric board.
- connection line between the two feed through holes and the center of the radiating metal patch is 90 degrees.
- the radiating metal patch includes one of a round patch and a square patch.
- the radiant metal patch is a circular patch with a diameter of 10-18 mm.
- the radiating metal patch is a square patch with a side length of 8-15 mm.
- the radiating metal patch is a microstrip resonant antenna that radiates and receives electromagnetic waves and converts them into voltage and current signals.
- the grounded metal surface and the radiating metal patch form a resonant cavity and direct electromagnetic radiation and reception to the upper space of the radiating metal patch.
- a signal transceiving method of a dual-polarized microstrip antenna includes the following steps:
- Step 1 Connect one of the feed ports on the dual-polarized microstrip antenna to the receiver, and the other feed port to the transmitter. Both feed ports are feed points; set two feeders The through holes are the feed through hole V and the feed through hole H;
- Step 2 The direction of the electromagnetic wave radiation field excited by the feed through hole V is the X direction, the direction of the electromagnetic wave radiation field excited by the feed through hole H is the Y direction, and the X direction is perpendicular to the Y direction;
- Step 3 The feed through hole V is connected to the transmitter, and the feed through hole H is connected to the receiver;
- Step 4 The electromagnetic wave is polarized and radiated in the X direction.
- the cross-polarized Y-polarized component of the reflected electromagnetic wave is received through the feed through hole H and enters Receiver processing, because the electromagnetic wave modes excited by the two feed points are orthogonal, the feed through hole V and feed through hole H are naturally isolated inside the dual-polarized microstrip antenna, and the receiving feed point will not receive the transmission feed point.
- the through signal can only receive the cross-polarized component caused by the reflection of the object.
- the beneficial effect of the present invention is that the dual-polarized microstrip antenna used for the 5.8GHz mobile sensor of the present invention directly uses a single antenna to obtain the effect of separate transmission and reception.
- the single antenna does not require additional termination power.
- Bridges or circulators are also smaller than dual antennas.
- the dual-polarized microstrip antenna of the present invention adopts a round or square patch antenna.
- the feeding point is placed at two orthogonal positions deviating from the center of the circle, and the feeding point is connected from the back of the antenna to the feeding position through a through hole.
- the connection between the feeding point and the center of the circle is in an orthogonal relationship of 90 degrees, and the polarization directions of electromagnetic wave radiation generated by different feeding points are also orthogonal.
- the electromagnetic wave modes excited by the two feeding points are orthogonal, so The coupling is very weak. Connect one of the feed points to the receiver and the other feed point to the transmitter. A single antenna will naturally obtain two separate signals.
- FIG. 1 is a schematic diagram of a side structure of a dielectric substrate with a radiation metal patch attached to a dielectric substrate in Example 1 of the present invention.
- FIG. 2 is a schematic diagram of the lateral structure of the dual-polarized microstrip antenna according to Embodiment 1 of the present invention.
- FIG. 3 is a schematic diagram of the structure of the back surface of the dielectric substrate covering the grounded metal surface in the embodiment 1 of the present invention.
- Fig. 4 is a schematic diagram of a side structure of a dielectric substrate with radiant metal patches attached to the dielectric substrate in Example 2 of the present invention.
- FIG. 5 is a schematic diagram of the lateral structure of a dual-polarized microstrip antenna according to Embodiment 2 of the present invention.
- FIG. 6 is a schematic diagram of the structure of the back surface of the dielectric substrate covering the grounded metal surface in the second embodiment of the present invention.
- the terms “installed”, “connected” and “connected” should be understood in a broad sense, unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of the two components, which can be a wireless connection or a wired connection connection.
- Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of the two components, which can be a wireless connection or a wired connection connection.
- the specific structure of the present invention is as follows, taking a circular radiating metal patch as an example:
- the dual-polarization microstrip antenna for mobile sensors of the present invention includes:
- the dielectric substrate 1 is provided with two conductive metal feeding vias;
- the radiating metal patch 2 is located on a surface of the dielectric substrate 1.
- the radiating metal patch 2 is provided with two feeding ports 24 deviated from the center 23 of the radiating metal patch, which are fed through the two conductive metal Electrical vias pass through the dielectric substrate 1 to the back of the dielectric substrate 1 and are respectively connected to the receiving and transmitting ports of the transceiver;
- the grounding metal surface 3 covers and closely adheres to the other surface of the dielectric substrate 1, and is provided with isolation regions 31 at the positions of the two feeding ports to insulate the feeding port and the grounding metal surface 3.
- the dielectric substrate is an FR4 board or a microwave dielectric board.
- the thickness of the FR4 board is determined according to actual needs, and the microwave dielectric board is a dielectric board with low loss signals.
- connection line between the two feed through holes and the center 23 of the radiating metal patch is 90 degrees.
- the radiant metal patch 2 is a circular patch with a diameter of 10-18 mm.
- a more preferred solution is that the circular patch is 13.8 mm.
- the radiating metal patch 2 is a microstrip resonant antenna that radiates and receives electromagnetic waves and converts them into voltage and current signals.
- the grounded metal surface 3 and the radiating metal patch 2 form a resonant cavity and direct electromagnetic radiation and reception to the upper space of the radiating metal patch 2.
- Embodiment 1 there are X-axis and Y-axis directions in the figure.
- the two feed through holes in Embodiment 1 are feed through holes V and feed through holes H.
- the feed through holes V excite The direction of the electromagnetic wave radiation field is the X-axis direction in Figure 1, and the direction of the electromagnetic wave radiation field excited by the feed through hole H is the Y-axis direction in Figure 1. Since electromagnetic waves satisfy the reciprocity theorem, emission and reception can be exchanged, You can connect any one of the feed ports to the receiver, and the other feed port to the transmitter. If it is connected to the transmitter through the feed through hole V, the electromagnetic wave is polarized and radiated in the X-axis direction.
- the cross-polarized Y-polarized component of the reflected electromagnetic wave is received through the feed through hole H and enters the receiving Because the electromagnetic wave modes excited by the two feed points are orthogonal, the feed through hole V and the feed through hole H are naturally isolated inside the antenna, and the receiving feed point will not receive the through signal from the transmitting feed point, but can only receive To the cross-polarized component produced by the reflection from the object.
- Embodiment 2 The specific structure of the present invention is as follows, taking a square radiating metal patch as an example:
- the dual-polarization microstrip antenna for mobile sensors of the present invention includes:
- the second dielectric substrate 10 is provided with two second power feeding vias;
- the second radiating metal patch 20 is mounted on a surface of the second dielectric substrate 10, on which two radiating metal patches 20 are arranged offset from the center 231 of the second radiating metal patch and are connected to The second feed through hole of the transceiver, which communicates with the two second feed through holes and uses conductive metal to pass through the second dielectric substrate 10 to the back of the second dielectric substrate 10 to form a second Two feeding ports 241;
- the second grounding metal surface 30 covers and abuts against the other surface of the second dielectric substrate 10, and is provided with a second isolation region 311 at the position of the two second feeding ports 241 to enable the second feeding
- the port 241 forms an isolation structure with the second grounded metal surface 30.
- the shapes of the second dielectric substrate 10 and the second grounded metal surface 30 are not limited, as long as the area of the second grounded metal surface 30 is larger than that of the second dielectric The area of the substrate 10 and the second grounded metal surface 30 should completely cover the back surface of the second dielectric substrate 10.
- the second dielectric substrate 10 includes one of an FR4 board and a microwave dielectric board, the thickness of the FR4 board is determined according to actual requirements, and the microwave dielectric board is a dielectric board with low loss signals.
- connection line between the two second feed through holes and the center 231 of the second radiating metal patch is 90 degrees.
- the second radiating metal patch 20 is a square patch with a side length of 8-15 mm.
- a more preferred solution is: the side length of the second radiating metal patch 20 It is 11.5mm.
- the second radiating metal patch 20 is a microstrip resonant antenna that radiates and receives electromagnetic waves and converts them into voltage and current signals.
- the second grounded metal surface 30 and the second radiating metal patch 20 form a resonant cavity and direct electromagnetic radiation and reception to the upper space of the second radiating metal patch 20 .
- a preferred technical solution of this embodiment two second feeding ports 241, one of the second feeding ports 241 is connected to the receiver, and the other second feeding port 241 is connected to the transmitter.
- the X-axis direction and the Y-axis direction are provided in the figure, and the two second power feed through holes in Embodiment 1 are respectively the second power feed through hole V and the second power feed through hole H,
- the direction of the electromagnetic wave radiation field excited by the second feed through hole V is the X axis direction in FIG. 4
- the direction of the electromagnetic wave radiation field excited by the second feed through hole H is the Y axis direction in FIG.
- the workability theorem, transmission and reception can be exchanged, and any one of the second feeding ports can be connected to the receiver, and the other second feeding port can be connected to the transmitter.
- the electromagnetic wave is polarized and radiated in the X-axis direction. If it is reflected by an object, the cross-polarized Y-polarized component of the reflected electromagnetic wave passes through the second feed through hole H Receive and enter the receiver for processing. Since the electromagnetic wave modes excited by the two feed points are orthogonal, the second feed through hole V and the second feed through hole H are naturally isolated inside the antenna, and the receiving feed point will not receive the transmitting feed. The through signal at a point can only receive the cross-polarized component caused by the reflection of the object.
- a signal transceiving method of a dual-polarized microstrip antenna includes the dual-polarized microstrip antenna structure in Embodiment 1 or Embodiment 2.
- the signal transceiving method of the dual-polarized microstrip antenna includes the following steps:
- Step 1 Connect one of the feed ports on the dual-polarized microstrip antenna to the receiver, and the other feed port to the transmitter. Both feed ports are feed points; set two feeders The through holes are the feed through hole V and the feed through hole H;
- Step 2 The direction of the electromagnetic wave radiation field excited by the feed through hole V is the X direction, the direction of the electromagnetic wave radiation field excited by the feed through hole H is the Y direction, and the X direction is perpendicular to the Y direction;
- Step 3 The feed through hole V is connected to the transmitter, and the feed through hole H is connected to the receiver;
- Step 4 The electromagnetic wave is polarized and radiated in the X direction.
- the cross-polarized Y-polarized component of the reflected electromagnetic wave is received through the feed through hole H and enters Receiver processing, because the electromagnetic wave modes excited by the two feed points are orthogonal, the feed through hole V and feed through hole H are naturally isolated inside the dual-polarized microstrip antenna, and the receiving feed point will not receive the transmission feed point.
- the through signal can only receive the cross-polarized component caused by the reflection of the object.
- the dual-polarized microstrip antenna used in the 5.8GHz mobile sensor of the present invention directly uses a single antenna to obtain the effect of separate transmission and reception.
- the single antenna does not require additional termination bridges or circulators, and is more compact
- the dual antenna is small.
- the dual-polarized microstrip antenna of the present invention adopts a round patch antenna.
- the feeding point is placed at two orthogonal positions deviated from the center of the circle, and the back of the antenna is connected to the feeding position through a through hole.
- the connection line between the point and the center of the circle is in an orthogonal relationship of 90 degrees, and the polarization directions of the electromagnetic wave radiation generated by different feeding points are also in an orthogonal relationship.
- the electromagnetic wave modes excited by the two feedings are orthogonal, so the coupling is very high. Weak, one of the feed points is connected to the receiver, and the other feed point is connected to the transmitter, a single antenna will naturally obtain two separate signals.
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Abstract
Description
Claims (9)
- 用于移动传感器的双极化微带天线,其特征在于,该双极化微带天线包括:介质基片(1),设有两个导电金属馈电过孔;辐射金属贴片(2),位于所述介质基板(1)的一表面,在该辐射金属贴片(2)上设置有两个偏离辐射金属贴片中心(23)的馈电端口(24),其通过所述两个导电金属馈电过孔穿过所述介质基片(1)至所述介质基片(1)的背面分别连接到收发机的接收和发射端口;接地金属面(3),覆盖并贴紧所述介质基片(1)的另一表面,其在两个馈电端口位置设置有隔离区(31)以使所述馈电端口与所述接地金属面(3)形成绝缘。
- 根据权利要求1所述的用于移动传感器的双极化微带天线,其特征在于,所述介质基片为FR4板或者微波介质板。
- 根据权利要求1所述的用于移动传感器的双极化微带天线,其特征在于,两个馈电通孔与辐射金属贴片中心(23)的连线成90度。
- 根据权利要求1所述的用于移动传感器的双极化微带天线,其特征在于,所述辐射金属贴片(2)包括圆形贴片、方形贴片的一种。
- 根据权利要求4所述的用于移动传感器的双极化微带天线,其特征在于,所述辐射金属贴片(2)为圆形贴片,其直径为10~18mm。
- 根据权利要求4所述的用于移动传感器的双极化微带天线,其特征在于,所述辐射金属贴片(2)为方形贴片,其边长为8~15mm。
- 根据权利要求1所述的用于移动传感器的双极化微带天线,其特征在于,所述辐射金属贴片(2)为辐射和接收电磁波并转化成电压和电流信号的微带谐振天线。
- 根据权利要求1所述的用于移动传感器的双极化微带天线,其特征在于,所述接地金属面(3)与所述辐射金属贴片(2)构成谐振腔并使电磁辐射和接收指向所述辐射金属贴片(2)的上部空间。
- 一种双极化微带天线的信号收发方法,其特征在于:包括权利要求1-9任意一项所述的双极化微带天线;该双极化微带天线的信号收发方法包括以下步骤:步骤一,将双极化微带天线上的其中一馈电端口接入到接收机,另一个馈电端口接入到发射机,两个馈电端口均为馈电点;设两个馈电通孔分别是馈电通孔V和馈电通孔H;步骤二,馈电通孔V激励的电磁波辐射电场的方向为X方向,馈电通孔H激励的电磁波辐射电场的方向为Y方向,X方向与Y方向垂直;步骤三,馈电通孔V接入到发射机,馈电通孔H接入到接收机;步骤四,电磁波以X方向极化辐射,在电磁波以X方向极化辐射的方向上,如果遇到物体反射,反射电磁波中的交叉极化的Y极化分量通过馈电通孔H接收,进入接收机处理,由于两馈电点激励电磁波模式正交,馈电通孔V以及馈电通孔H在双极化微带天线内部自然隔离,接收馈电点不会收到发射馈电点的直通信号,只能收到由物体反射产生的交叉极化分量。
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CN110739533A (zh) * | 2019-11-18 | 2020-01-31 | 深圳市易探科技有限公司 | 一种双面板双极化的天线 |
CN113708055B (zh) * | 2020-05-21 | 2022-12-06 | 华为技术有限公司 | 一种多频双极化天线及电子设备 |
CN113839205B (zh) * | 2021-09-22 | 2024-06-18 | 广东电网有限责任公司广州供电局 | 电力变压器、电力检测装置与局部放电信号监测天线 |
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