CN117220028A - Feeder shield, antenna array, antenna cover, radio device, and electronic apparatus - Google Patents

Abstract

The application discloses a feeder line shielding cover, an antenna array, an antenna cover, a radio device and electronic equipment, wherein the feeder line shielding cover is covered between a first feeder line and a second feeder line which are respectively corresponding to a first antenna and a second antenna, and comprises a first dielectric layer and a decoupling structure arranged on one surface of the first dielectric layer; wherein the decoupling structure is coupled to the first feed line, the second feed line, which converts the radiation leaked by the first feed line or the second feed line into a leakage signal to attenuate a coupling signal between the first antenna and the second antenna. According to the technical scheme, when the antenna array receives and transmits signals, the leakage signals transmitted by the decoupling structure can offset the coupling signals, so that the feeder line shielding cover has a traditional shielding function and meanwhile the isolation between the antennas is reduced.

Description

Feeder shield, antenna array, antenna cover, radio device, and electronic apparatus

Technical Field

Embodiments of the present application relate to antenna technology, and in particular, to a feeder line shield, an antenna array, an antenna cover, a radio device, and an electronic apparatus.

Background

With the increasing development of scientific technology, intelligent driving technology is beginning to be popularized in daily life. The sensor plays a key role in intelligent driving, and is a channel for an intelligent system of an automobile to acquire external information. In order to obtain distance, speed and angle information of a target, a radar sensor often adopts a multiple-input multiple-output working mode of multiple transceiver antennas.

Since the millimeter wave transceiver in the radar sensor is often small, the input/output port of the millimeter wave transceiver needs to be connected to an external antenna through a microstrip line with a length of tens to hundreds of micrometers. Such a tight spatial layout tends to deteriorate the isolation between antennas, degrading the performance of the radar sensor.

Content of the application

The application provides a feeder line shielding cover, an antenna array, an antenna cover, a radio device and electronic equipment, so as to reasonably reduce isolation between antennas.

In a first aspect, an embodiment of the present application provides a feeder line shielding cover, which covers between a first feeder line and a second feeder line corresponding to a first antenna and a second antenna, and includes a first dielectric layer and a decoupling structure disposed on one side of the first dielectric layer; the decoupling structure is coupled with the first feeder line and the second feeder line and is used for converting radiation leaked by the first feeder line or the second feeder line into leakage signals so as to weaken coupling signals between the first antenna and the second antenna.

In a second aspect, an embodiment of the present application further provides an antenna array, including: adjacent first and second antennas; wherein the first antenna comprises a first radiating portion and a first feeder line; the second antenna comprises a second radiation part and a second feeder line; and the decoupling structure is coupled with the first feeder line and the second feeder line and is used for converting the radiation leaked by the first feeder line or the second feeder line into leakage signals so as to weaken the coupling signals between the first radiation part and the second radiation part.

In a third aspect, an embodiment of the present application further provides an antenna radome, configured to cover a first antenna and a second antenna, where the first antenna includes a first feeder line, and the second antenna includes a second feeder line; the radome comprises: the wave-transmitting plate is arranged at the radiation parts of the first antenna and the second antenna; a decoupling structure coupled with the first feeder line and the second feeder line; for converting radiation leaked by the first feed line or the second feed line into a leakage signal to attenuate a coupling signal between the first antenna and the second antenna.

In a fourth aspect, an embodiment of the present application further provides a radio device, including: the antenna array of the second aspect; and a signal transceiver connected to the antenna array; wherein the antenna array comprises a transmitting antenna and a receiving antenna; the transmitting antenna or receiving antenna includes: a first antenna and/or a second antenna; the signal receiving and transmitting device is used for transmitting detection signal waves by driving a transmitting antenna in the antenna array; receiving echo signal waves formed by reflection and/or scattering of the detection signal waves by a target through a receiving antenna in the antenna array to obtain radio frequency receiving signals; and outputting a baseband digital signal obtained by processing the radio frequency reception signal.

In a fifth aspect, embodiments of the present application further provide a radio device, including: an antenna array, a feeder shield as claimed in the first aspect, or a radome as claimed in the third aspect; and a signal transceiver connected to the antenna array; wherein the antenna array comprises a transmitting antenna and a receiving antenna; the decoupling structure in the feeder shielding cover is arranged between the transmitting antennas, the receiving antennas or between the transmitting antennas and the receiving antennas; the signal receiving and transmitting device is used for transmitting detection signal waves by driving a transmitting antenna in the antenna array; receiving echo signal waves formed by reflection and/or scattering of the detection signal waves by a target through a receiving antenna in the antenna array to obtain radio frequency receiving signals; and outputting a baseband digital signal obtained by processing the radio frequency reception signal.

In a sixth aspect, an embodiment of the present application further provides an electronic device, including: a radio device as in the third or fourth aspect; a processor connected to the radio device; and a memory coupled to the processor.

The application provides a decoupling structure which is a symmetrical structure based on feeder direction symmetry and is positioned between a first feeder line and a second feeder line corresponding to adjacent first antenna and second antenna contained in an antenna array, wherein the first feeder line and the second feeder line are separated by a first preset distance, a first feed point corresponding to the first antenna and a second feed point corresponding to the second antenna are separated by a second preset distance, and leakage signals transmitted by the decoupling structure are used for counteracting coupling signals between the first antenna and the second antenna. According to the technical scheme, when the antenna array receives and transmits signals, the leakage signals transmitted by the decoupling structures between the first feeder line and the second feeder line corresponding to the first antenna and the second antenna can be used for counteracting the coupling signals coupled between the first antenna and the second antenna, so that the feeder line shielding cover has a traditional shielding function and meanwhile, the isolation degree between the antennas is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a feeder shielding cover according to an embodiment of the present application;

fig. 2 is a schematic diagram of a feeder shielding cover provided by an embodiment of the present application covering a feeder line of an antenna array;

fig. 3 is a schematic diagram of the operation of the decoupling structure and the first and second antennas according to an embodiment of the present application;

FIG. 4 is a graph comparing the isolation between feed points of adjacent antennas without or with a feed line shield;

fig. 5 is a schematic diagram of an antenna array according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a radio device according to a third embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The terms "first" and "second" and the like in the description and in the drawings are used for distinguishing between different objects or between different processes of the same object and not for describing a particular order of objects.

Furthermore, references to the terms "comprising" and "having" and any variations thereof in the description of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more.

Each antenna in an antenna array in a radar sensor typically includes a microstrip feed line and a radiating portion. In engineering, the antenna array of the radar sensor has a compact structure, so that the physical interval between the antennas in the antenna array is limited. Meanwhile, the antenna array also needs to meet the technical indexes of the radar sensor, such as radiation range, radiation angle, radiation power and the like. For this reason, on the one hand, the shortened physical interval between the radiation parts easily causes the generation of coupling signals between the radiation parts; on the other hand, the winding structure of each microstrip line needs to be considered to match the transmission power and impedance between the connected signal receiving and transmitting port and the radiating part, so that the situation of signal leakage exists in the winding structure of the microstrip line. Both signals affect the overall performance of the antenna array. In some examples, the metal sheet is used as a shielding structure to reduce various interference signals generated between the antennas, but the shielding structure formed by the metal sheet has influence on the radiation/reception of electromagnetic waves by the antennas on one hand, and reduces isolation between the antennas on the other hand, so that the effect of improving the overall performance of the antennas is limited.

The present application therefore proposes a feeder shield. The feeder line shielding cover at least comprises a first dielectric layer and a first metal layer arranged on at least one side of the first dielectric layer. The first metal layer on one side is provided with a decoupling structure which is designed for a winding structure of the feeder line. The decoupling structure is used for additionally adding a part of leakage signals in a signal loop of the antenna, wherein the part of leakage signals can be mutually offset with coupling signals coupled between adjacent antennas; the feeder line shielding cover has the traditional shielding effect, can reduce isolation between antennas, and widens the functions of the feeder line shielding cover. In some examples, a first metal layer disposed on the other side of the first dielectric layer is used to shield radiation that leaks from the antenna array.

The feeder shield proposed by the present application will be described in detail with reference to the drawings and embodiments.

Example 1

The embodiment of the application provides a feeder line shielding cover, which is covered between feeder lines of an antenna array contained in a radio device, and radiation of the feeder lines is shielded by using decoupling structures and metal layers which are arranged on two sides of a first dielectric layer. Specifically, the feeder shielding cover comprises a first dielectric layer and a first metal layer decoupling structure arranged on two sides of the first dielectric layer, wherein the decoupling structure is positioned between a first feeder and a second feeder corresponding to adjacent first antennas and second antennas contained in the antenna array. The decoupling structure converts radiation leaked by the first feed line or the second feed line into a leakage signal to attenuate a coupling signal between the first antenna and the second antenna.

The decoupling structure is made by using a metal film, which may be adhered to one side of the first dielectric layer of the feeder shield by pasting, or by using a PCB manufacturing process to make the decoupling structure on one side of the first dielectric layer.

Fig. 1 is a schematic diagram of a feeder shielding cover provided in an embodiment of the present application, as shown in fig. 1, the two feeder lines are generally parallel, a decoupling structure is in a symmetrical structure based on a feeder line direction, and is spaced apart from the first feeder line and the second feeder line by a first preset distance, and a first feeding point corresponding to the first antenna and a second feeding point corresponding to the second antenna are spaced apart from each other by a second preset distance, and leakage signals transmitted by the decoupling structure are used for canceling coupling signals between the first antenna and the second antenna.

As shown in fig. 1, one side of the first dielectric layer is also provided with a first metal layer (not shown) for shielding radiation of the feed lines in the antenna array. The shadow part of the first dielectric layer is a decoupling structure arranged on the other surface of the first dielectric layer, and the dashed lines on two sides are the positions of a first feeder line and a second feeder line corresponding to the adjacent first antenna and second antenna in the antenna array covered by the feeder line shielding cover. The decoupling structure is positioned between the first feeder line and the second feeder line, the decoupling structure is a symmetrical structure symmetrical about a central line between the first feeder line and the second feeder line, the left edge of the decoupling structure is spaced from the first feeder line by a first preset distance, and the right edge of the decoupling structure is also spaced from the second feeder line by the first preset distance. The lower end point of the first feeder line is a first feeding point corresponding to the first antenna, the lower end point of the second feeder line is a second feeding point corresponding to the second antenna, the distance between the left equivalent point A of the decoupling structure and the first feeding point is a second preset distance, and the distance between the right equivalent point B of the decoupling structure and the second feeding point is the second preset distance.

The decoupling structure shown in fig. 1 captures radiation of the first feed line (or the second feed line) by inductive coupling to form a leakage signal that propagates along the decoupling structure and is transferred to the second feed line (or the first feed line) by inductive coupling. Fig. 2 is a schematic diagram of a feeder line shielding cover provided by an embodiment of the present application covering feeder lines of an antenna array, where, as shown in fig. 2, a first antenna includes a first radiation portion and a first feeder line, and a second antenna includes a second radiation portion and a second feeder line. The coupling signal is formed between the first radiating portion and the second radiating portion, which are connected to the first feeder line and the second feeder line, respectively, and is also transmitted in the second feeder line (or the first feeder line). It follows that the decoupling structure can adjust the phase and amplitude of the leakage signal by its shape, impedance, etc. such that the leakage signal transmitted in the second feed line (or the first feed line) and the coupled signal are opposite in phase and equal in amplitude, thus minimizing the two interference signals formed at the antenna.

It should be appreciated that in practical engineering, the location, shape, or process of the decoupling structure affects the phase change and amplitude of the transmitted leakage signal, and therefore, the manner of attenuating the leakage signal and the coupling signal is used to effectively reduce the interference signal in the antenna array.

In fig. 1, an example of a case where the first feeder line and the second feeder line are substantially parallel is shown, and the i-shaped ring structure may be considered to be axisymmetric or may be considered to be centrosymmetric. In other examples, the axis of symmetry of the decoupling structure may be set based on the angled centerline between the first feed and the second feed, depending on the region of physical separation between the first feed and the second feed, thus resulting in an axisymmetric decoupling structure. In still other examples, where the first feed line and the second feed line are substantially parallel, the decoupling structure is simply an axisymmetric structure.

The first predetermined distance between the decoupling structure and the first feed line or the second feed line, respectively, is used to determine the amplitude of the leakage signal. Here, the leakage signal that can be obtained by the decoupling structure is related to the gap between the decoupling structure and the corresponding first feed (or second feed). A narrower gap can sense a larger signal energy. In order to match the amplitude of the coupled signal as much as possible so that the two signals effectively attenuate each other, the width of the gap also has to take into account the amplitude of the coupled signal.

The decoupling structure is respectively arranged at a second preset distance between the decoupling structure and the first feeder line of the first antenna or the second feeder line of the second antenna, and is used for determining the initial phase of the acquired leakage signal. Taking the second preset distance between the equivalent point a and the first feeding point (or the equivalent point B and the second feeding point) of the decoupling structure as an example, the length from the first feeding point to any point on the first feeding line is related to the phase of the radio frequency signal. Thus, by configuring the second preset distance between the decoupling structure and the first feeding point (or the second feeding point), an initial phase of the leakage signal can be determined. The phase is adjusted by a decoupling structure which, when coupling a leakage signal to another feed line, forms a signal which is approximately 180 deg. out of phase with the coupled signal at a respective location section of the respective feed line, thereby achieving the purpose of attenuation of both signals.

In order to improve the adjustment performance of the leakage signal in amplitude and phase difference, the coupling position of the decoupling structure and the first feeder line (or the second feeder line) can adopt electric connection or inductive coupling matched with high impedance so as to obtain the leakage signal.

In some examples, the decoupling structure includes: an inductive coupling structure and a phase structure.

The inductive coupling structure is inductively coupled with the first feeder line and the second feeder line to induce radiation of the first feeder line or the second feeder line and generate leakage signals. The phase structure is connected to the inductive coupling structure for changing the phase of the transmitted leakage signal to match the phase difference with the coupling signal such that the energy of the leakage signal and the coupling signal is attenuated.

Here, the distance between the inductive coupling structure and the first feeder line and the distance between the inductive coupling structure and the second feeder line have a similar process error.

Specifically, the inductive coupling structure includes a first inductive coupling portion and a second inductive coupling portion. The first inductive coupling part is used for coupling the first feeder line. The second inductive coupling portion is used for coupling the second feeder line.

The first inductive coupling portion (or the second inductive coupling portion) is exemplified by a microstrip line structure, and the length of the first inductive coupling portion (or the second inductive coupling portion) is related to the energy of the induced leakage signal. For example, as shown in fig. 1, the longer the length W1 of the first inductive coupling portion (or the second inductive coupling portion), the greater the energy of the acquired leakage signal. The first inductive coupling portion and the second inductive coupling portion are connected by the phase structure.

Taking the example that a first feeder line in a first antenna radiates energy, and a first radiation part of the first antenna outputs a coupling signal to a second radiation part in a second antenna, the first inductive coupling part induces radiation of the first feeder line to generate a leakage signal; adjusting the phase of the leakage signal by a phase structure; the second inductive coupling portion is inductively coupled with the second feeder line to transmit the phase-adjusted leakage signal to the second feeder line, so that the coupled signal and the leakage signal have the characteristics of approximately opposite phases and equivalent amplitudes through the second feeder line to weaken each other.

In order to have the phase of the leakage signal substantially inverted in the same feed line as the phase of the coupling signal. The phase structure comprises a planar structure such as a meander or a cross-layer three-dimensional structure. For a structure with high sensitivity and high precision, the size of the phase structure also affects the amplitude of the leakage signal by a small amplitude. Still referring to fig. 1, the two inductive coupling structures are connected such that the zigzag structure of the whole decoupling structure in a ring structure is a phase structure. Wherein the dimension W2 of the edge forming the folded portion in the phase structure and the number of the edges are used to adjust the phase variation of the leakage signal. Dimension W represents the shortest spacing in the phase structure that should guarantee the dimensional requirements in the phase structure with respect to physical isolation.

In the feeder line shielding cover provided by the application, the leakage signal added by the decoupling structure can offset the coupling signal coupled between the first antenna and the second antenna, so that the feeder line shielding cover has the traditional shielding function and simultaneously reduces the isolation between the antennas.

Fig. 3 is a working schematic diagram of the decoupling structure and the first and second antennas of the present application, as shown in fig. 3, in a loop formed by a first microstrip line (i.e. a first feeder line), the decoupling structure and a second microstrip line (i.e. a second feeder line), a first signal loop for transmitting leakage signals includes the following signals: the leakage signal, the first radio frequency signal transferred from the first feeding point to the decoupling structure, and the second radio frequency signal transferred from the decoupling structure to the second feeding point. In a loop formed by the first microstrip line, the first radiation part, the second radiation part and the second microstrip line, the second signal loop for transmitting the coupling signal comprises the following signals: the first feeding point transmits a third radio frequency signal to the first radiating portion, a coupling signal coupled between the first antenna and the second antenna, and a fourth radio frequency signal to the second feeding point.

The leakage signal may be expressed as Se ^-jα The first and second radio frequency signals may each be denoted as e ^-jθ The third radio frequency signal and the fourth radio frequency signal can be represented asThe coupled signal may be denoted as Ce ^-jβ . If the superimposed signals in the first and second signal loops are equal in amplitude and 180℃apart, i.e. the superimposed signals are phase-shiftedThe leakage signal added by the decoupling structure can be made to cancel the coupling signal coupled between the first antenna and the second antenna.

For a determined antenna array, the coupling signal coupled between the first antenna and the second antenna is determined, the second energy transferred by the first feeding point to the decoupling structure and the decoupling structure to the second feeding point is also determined, the third energy transferred by the first feeding line and the second feeding line is also determined, and thus the leakage signal Se can be adjusted ^-jα So that the above equation holds.

The first preset distance between the left edge of the decoupling structure and the first feeder line and the first preset distance between the right edge of the decoupling structure and the second feeder line can be used for determining the leakage signal Se ^-jα A second preset distance between the left equivalent point A of the decoupling structure and the first feeding point and between the right equivalent point B of the decoupling structure and the second feeding point can be used for determining the leakage signal Se ^-jα Is a phase of (a) of (b).

Therefore, the first preset distance and the second preset distance can be determined according to the equation, and further the layout of the decoupling structure on the first dielectric layer is determined, so that the feeder shielding cover meeting the actual requirements is obtained.

In one embodiment, the decoupling structure comprises a first decoupling structure and a second decoupling structure that are symmetrical to each other, and the size information determined according to the shapes of the first decoupling structure and the second decoupling structure is used to adjust the amplitude of the leakage signal.

In determining the leakage signal Se based on the first preset distance and the second preset distance ^-jα If the equation is after the amplitude and phase of (2)And still not be true.

At this time, the first preset distance or the size information of the first decoupling structure and the second decoupling structure contained in the decoupling structure can be adjusted to fine tune the leakage signal Se ^-jα Can also adjust the second preset distance to fine tune the leakage signal Se ^-jα Is a phase of (a) of (b).

It should be noted that the first preset distance is reduced and the signal Se is leaked ^-jα The amplitude of (a) increases with the increase of the first preset distance, the leakage signal Se ^-jα With a consequent increase in the amplitude of (a).

In the feeder line shielding cover shown in fig. 1, the decoupling structure is a hollow i-shaped structure, the first coupling structure and the second coupling structure each include a long side and two short sides, a third preset distance is spaced between the two short sides, and the length W1 of the long side can be used for adjusting the amplitude of the leakage signal; the length W2 of the short side can be used to adjust the phase of the leakage signal.

Fig. 4 is a graph showing the comparison of the isolation between the feed points of adjacent antennas when the feeder shield is not included or included, and as shown in fig. 4, the solid line shows the isolation between the feed points of adjacent antennas when the feeder shield is not included, and the dotted line shows the isolation between the feed points of adjacent antennas when the feeder shield is included, it can be known that the isolation between the feed points of adjacent antennas when the center frequency is 77 GHz-79.8 GHz can be effectively improved by introducing the feeder shield including the decoupling structure provided by the application.

The first embodiment of the application provides a feeder shielding cover, which is covered on a feeder line of an antenna array contained in a radio device and comprises a first dielectric layer and first metal layers and decoupling structures arranged on two sides of the first dielectric layer, wherein the decoupling structures are symmetrical structures based on feeder line directions and positioned between a first feeder line and a second feeder line corresponding to adjacent first antennas and second antennas contained in the antenna array, the first feeder line and the second feeder line are respectively separated by a first preset distance, a first feed point corresponding to the first antennas and a second feed point corresponding to the second antennas are respectively separated by a second preset distance, and leakage signals transmitted by the decoupling structures are used for counteracting coupling signals between the first antennas and the second antennas. According to the technical scheme, when the antenna array receives and transmits signals, the leakage signals transmitted by the decoupling structures between the first feeder line and the second feeder line corresponding to the first antenna and the second antenna can be used for counteracting the coupling signals coupled between the first antenna and the second antenna, so that the feeder line shielding cover has a traditional shielding function and meanwhile, the isolation degree between the antennas is reduced.

Example two

The application also provides an antenna array comprising the decoupling structure. The antenna array comprises a first antenna and a second antenna which are adjacent. Wherein the first antenna comprises a first radiating portion and a first feeder line; the second antenna includes a second radiating portion and a second feeder line. The decoupling structure is coupled with the first feeder line and the second feeder line, and converts the radiation leaked by the first feeder line or the second feeder line into leakage signals so as to weaken coupling signals between the first radiation part and the second radiation part.

Here, the decoupling structure is the same as or similar to the decoupling structure in the feeder shield described above. Unlike the decoupling structure in the feed line shield, the decoupling structure in the antenna array is disposed in at least one metal layer that makes up the antenna array. The decoupling structure in the antenna array may be located in the same metal layer as the first and second feed lines.

Wherein, in some examples, the first antenna and the second antenna may each be a transmit antenna or a receive antenna in an antenna array. If the signal power transmitted by the first antenna and the second antenna are different, a coupling signal may be generated between the radiating parts of the adjacent first antenna and second antenna, and a leakage signal is generated between the feed lines of the adjacent first antenna and second antenna by the decoupling structure. Thus, signal interference generated by the two types of signals can be weakened by utilizing the decoupling structure.

In other examples, the first antenna is a transmitting antenna in an antenna array and the second antenna is a receiving antenna in the antenna array. When the first antenna transmits radio frequency signals, the second radiation part of the second antenna senses radiation generated by the first radiation part of the first antenna to obtain coupling signals; through the decoupling structure, radiation generated by the first feed of the first antenna is transferred to the second feed of the second antenna to form a leakage signal of comparable magnitude as the phase of the coupled signal. Thus, the decoupling structure is utilized to attenuate signal interference generated by the two types of signals.

Here, the antenna array may also be provided with a feeder shield, which for example comprises a first dielectric layer and a first metal layer.

Example III

The application further provides an antenna housing comprising the decoupling structure. Wherein the decoupling structure is the same as or similar to the decoupling structure in the feeder shield described above.

Unlike the feeder shield, the radome covers the antenna array. The corresponding areas of the corresponding antenna arrays of the radome are made of wave-transmitting materials, and the decoupling structures are arranged in the areas between the adjacent feeder lines of the corresponding antenna arrays, so that the feeder lines are conveniently coupled to acquire leakage signals. The whole area of each feeder line of the corresponding antenna array of the radome is also provided with a metal layer for shielding the radiation of the feeder line, so as to achieve the purpose of shielding the radiation of the feeder line. For example, the radome comprises a dielectric sheet for covering over the entirety of the antenna array; a decoupling structure is adhered to one surface of the dielectric plate facing the feeder lines in the area between the feeder lines; and a metal layer is arranged in the area of the dielectric plate, which is opposite to the feeder line and where the feeder line is located. Thus, the antenna housing is realized to transmit electromagnetic waves emitted/received by each radiation part of the antenna on one hand and effectively shield radiation of the feeder on the other hand.

Example IV

The application also provides a radio device comprising an antenna array and a feeder shield. As shown in fig. 5, the radio device includes an antenna array and a feeder shield (or radome). Taking a feeder shielding cover as an example, the feeder shielding cover comprises a first dielectric layer and first metal layers and decoupling structures arranged on two sides of the first dielectric layer, wherein the decoupling structures are symmetrical structures which are positioned between a first feeder line and a second feeder line corresponding to adjacent first antennas and second antennas contained in the antenna array and are symmetrical based on feeder line directions, the first feeder line and the second feeder line are spaced by a first preset distance, first feed points corresponding to the first antennas and second feed points corresponding to the second antennas are spaced by a second preset distance, and leakage signals transmitted between the decoupling structures are used for counteracting coupling signals between two adjacent antennas.

Further, the antenna array is arranged on one side of the second dielectric layer, and a second metal layer is arranged on the other side of the second dielectric layer; the decoupling structure is disposed opposite the antenna array.

In the radio device provided by the embodiment of the application, when the antenna array receives and transmits signals, the leakage signals transmitted by the decoupling structures between the first feeder line and the second feeder line corresponding to the first antenna and the second antenna can be used for counteracting the coupling signals coupled between the first antenna and the second antenna, so that the feeder line shielding cover has the traditional shielding function and simultaneously reduces the isolation between the antennas.

Example five

An embodiment of the present application provides a radio device including: an antenna array comprising a decoupling structure. In some examples, a feeder shield with a metal layer may also be provided in the radio device to further reduce radiation from the feeder.

An antenna array in any of the radio devices mentioned in the fourth and fifth embodiments described above, including a transmitting antenna and a receiving antenna; the transmitting antenna or receiving antenna includes: a first antenna and/or a second antenna.

The radio device further comprises signal transceiving means connected to the antenna array for transmitting a detection signal wave by driving a transmitting antenna in the antenna array; receiving echo signal waves formed by reflection and/or scattering of the detection signal waves by a target through a receiving antenna in the antenna array to obtain radio frequency receiving signals; and outputting a baseband digital signal obtained by processing the radio frequency reception signal.

Fig. 6 is a schematic structural diagram of a radio device according to an embodiment of the present application, where, as shown in fig. 6, the radio device includes: an antenna array 610 and a signal transceiver 620. In some examples, the antenna array 610 and the signal transceiver 620 are directly connected without a power splitting module. For example, the antenna 610 and the signal transceiving means 620 are directly connected using a feeder line.

In this embodiment, a first antenna in the antenna array is taken as a transmitting antenna, and a second antenna is taken as a receiving antenna as an example. A signal transmitter in the signal receiving and transmitting device outputs a radio frequency transmission signal with linear continuous frequency modulation through a first feed point, and a first feeder line transmits the radio frequency transmission signal to a first radiation part. The first feed line generates radiation during transmission and is inductively coupled by a first inductive coupling portion in the decoupling structure to form a leakage signal. Wherein in case of a determined decoupling structure the initial phase and amplitude of the leakage signal is related to the position of the first inductive coupling with respect to the first feed line. The leakage signal is phased via a phase structure in the decoupling structure. At the same time, the first feeder transmits the radio frequency emission signal to the first radiation part, and the first radiation part emits detection signal waves in the form of electromagnetic waves. In this case, a coupling signal is generated between the first radiation part and the second radiation part, which coupling signal is transmitted via the second feeder line. The phase-adjusted leakage signal is transferred into the second feed line via inductive coupling between the second inductive coupling portion in the decoupling structure and the second feed line. The leakage signal and the coupling signal thus form signals that cancel each other out in phase opposition and in amplitude.

The detection signal wave emitted by the first radiation part is reflected by the object to form an echo signal wave. The echo signal wave is converted into a radio frequency reception signal by a reception antenna. Similar to the rf transmit signal process described above, the rf receive signal also generates a coupling signal and a leakage signal during transmission through the second antenna, which will not be described in detail herein.

For this purpose, the signal transceiver device comprises a signal transmitter and a signal receiver. The antenna array and the signal transceiver determine the circuit structure according to the surrounding environment measured by the radar sensor, so as to send out detection signal waves and receive echo signal waves in a preset frequency band or fixed frequency, and perform signal processing on corresponding radio frequency electric signals.

The signal transmitter is used for transmitting radio frequency transmission signals corresponding to the detection signal waves to the transmitting antennas in the antenna array. For example, the signal transmitter feeds a radio frequency transmit signal to the transmit antenna such that the transmit antenna generates a probe signal wave having a center frequency in a frequency band such as 64GHz, or 77 GHz. The signal transmitter can generate a detection signal wave with a fixed frequency as a center frequency or a detection signal wave with a frequency sweep with the center frequency and a preset bandwidth. Taking the example that the detection signal wave includes at least one chirp signal, wherein the chirp signal is an electromagnetic wave signal formed based on a chirp period, the signal transmitter performs frequency multiplication processing based on a signal source of the chirp period, and feeds the signal source to a transmitting antenna to transmit the detection signal wave including the chirp signal. When the detection signal wave is reflected by the object, an echo signal wave is formed. The receiving antenna receives the echo signal wave to generate an echo electric signal.

The signal receiver is used for generating a radio frequency transmitting signal, and performing mixing, filtering, ADC and other processing on the radio frequency receiving signal output by the receiving antenna in the antenna array so as to output a baseband digital signal.

In some examples, the radar sensor further comprises a signal processor.

The signal processor is connected with the signal receiving and transmitting device and is used for extracting measurement information from the baseband digital signal through signal processing and outputting measurement data. The signal processing comprises digital signal processing calculation based on phase, frequency, time domain and the like of at least one path of signals to be processed provided by at least one path of receiving antennas. The measurement data includes at least one of: distance data representing a relative distance of the detected at least one obstacle; speed data representing a relative speed of the detected at least one obstacle; angle data representing the relative angle of the detected at least one obstacle, etc.

Example six

An embodiment of the present application provides an electronic device, including: a radio device as claimed in any preceding claim; a processor connected to the radio device; and a memory coupled to the processor.

Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where, as shown in fig. 7, the electronic device includes a processor 110, a memory 120, and a radio device 130; the number of processors 110 in the electronic device may be one or more, one processor 110 being taken as an example in fig. 7; the processor 110, memory 120, and radio 130 in the electronic device may be connected by a bus or other means, for example in fig. 7.

The processor 110 may include one or more central processing units (central processing unit, CPU) and may also include a plurality of processors 110. Each of these processors 110 may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor 110 herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The memory 120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 120 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 120 may further include memory located remotely from processor 110, which may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The radio device 130 may output a digital signal obtained by processing a radio frequency reception signal; wherein the echo signal wave is formed by reflecting the detection signal wave.

The radio device 130 included in the electronic apparatus according to the embodiment of the present application may output a digital signal obtained by processing a radio frequency received signal based on the antenna included in the radio device 130, which has the same advantageous effects as the antenna provided in each of the above examples.

In an alternative embodiment, the electronic device body may be a component and a product applied to fields such as smart home, transportation, smart home, consumer electronics, monitoring, industrial automation, in-cabin detection, health care, and the like. For example, the device body may be an intelligent transportation device (such as an automobile, a bicycle, a motorcycle, a ship, a subway, a train, etc.), a security device (such as a camera), a liquid level/flow rate detection device, an intelligent wearing device (such as a bracelet, glasses, etc.), an intelligent home device (such as a sweeping robot, a door lock, a television, an air conditioner, an intelligent lamp, etc.), various communication devices (such as a mobile phone, a tablet computer, etc.), etc., a barrier gate, an intelligent traffic indicator, an intelligent indicator, a traffic camera, various industrial mechanical arms (or robots), etc., and may also be various instruments for detecting vital sign parameters and various devices carrying the instruments, such as an in-car detection, an indoor personnel monitoring, an intelligent medical device, a consumer electronic device, etc.

Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.

Claims (17)

1. The feeder line shielding cover is characterized by being covered between a first feeder line and a second feeder line which correspond to a first antenna and a second antenna respectively, and comprising a first dielectric layer and a decoupling structure arranged on one side of the first dielectric layer;

the decoupling structure is coupled with the first feeder line and the second feeder line and is used for converting radiation leaked by the first feeder line or the second feeder line into leakage signals so as to weaken coupling signals between the first antenna and the second antenna.

2. The feeder shield of claim 1, wherein a first predetermined distance between the decoupling structure and the first feeder or the second feeder, respectively, is used to determine the magnitude of the leakage signal; the second preset distance between the decoupling structure and the first feeding point of the first antenna or the second feeding point of the second antenna is used for adjusting the initial phase of the leakage signal.

3. A feeder shield according to claim 1, wherein the dimensions provided along the shape of the decoupling structure are related to the amplitude and/or phase difference of the leakage signal.

4. The feeder shield of claim 1, wherein the decoupling structure is a symmetrical structure.

5. The feeder shield of claim 1, wherein the decoupling structure is an i-shaped ring structure.

6. The feeder shield of claim 1, wherein the decoupling structure comprises:

an inductive coupling structure for inductively coupling with both the first feed line and the second feed line to induce radiation of either the first feed line or the second feed line and generate a leakage signal;

and the phase structure is connected with the inductive coupling structure and is used for changing the phase of the transmitted leakage signal so as to match the phase difference between the leakage signal and the coupling signal, so that the energy of the leakage signal and the coupling signal is weakened.

7. The feeder shield of claim 6, wherein the inductive coupling structure comprises:

a first inductive coupling portion for coupling to the first feed line;

a second inductive coupling portion for coupling to the second feed line;

The first inductive coupling portion and the second inductive coupling portion are connected by the phase structure.

8. The feeder shield of claim 1, further comprising a first metal layer disposed on the other side of the first dielectric layer for shielding radiation from the first and second feeders.

9. An antenna array, comprising:

adjacent first and second antennas; wherein the first antenna comprises a first radiating portion and a first feeder line; the second antenna comprises a second radiation part and a second feeder line;

and the decoupling structure is coupled with the first feeder line and the second feeder line and is used for converting the radiation leaked by the first feeder line or the second feeder line into leakage signals so as to weaken the coupling signals between the first radiation part and the second radiation part.

10. The antenna array of claim 9, wherein the first feed line, the second feed line, and the decoupling structure are of the same metal layer; or the first feeder line and the second feeder line belong to the same metal layer, and the decoupling structure belongs to another metal layer.

11. The antenna array according to claim 9, characterized in that the dimensions provided along the shape of the decoupling structure are related to the amplitude and/or phase difference of the leakage signal.

12. The antenna array of claim 9, wherein the decoupling structure is a symmetrical structure.

13. The antenna array of claim 9, wherein the decoupling structure comprises:

an inductive coupling structure inductively coupled with both the first feed line and the second feed line to couple a leakage signal leaked from the first feed line or the second feed line;

and the phase structure is connected with the inductive coupling structure and is used for changing the phase of the transmitted leakage signal so as to match the phase difference between the leakage signal and the coupling signal, so that the energy of the leakage signal and the coupling signal is weakened.

14. A radome for covering a first antenna and a second antenna, wherein the first antenna comprises a first feed line and the second antenna comprises a second feed line; the radome comprises:

the wave-transmitting plate is arranged at the radiation parts of the first antenna and the second antenna;

a decoupling structure coupled with the first feeder line and the second feeder line; for converting radiation leaked by the first feed line or the second feed line into a leakage signal to attenuate a coupling signal between the first antenna and the second antenna.

15. A radio device, comprising: an antenna array as claimed in any one of claims 9 to 13; and a signal transceiver connected to the antenna array; wherein the antenna array comprises a transmitting antenna and a receiving antenna; the transmitting antenna or receiving antenna includes: a first antenna and/or a second antenna;

the signal receiving and transmitting device is used for transmitting detection signal waves by driving a transmitting antenna in the antenna array; receiving echo signal waves formed by reflection and/or scattering of the detection signal waves by a target through a receiving antenna in the antenna array to obtain radio frequency receiving signals; and outputting a baseband digital signal obtained by processing the radio frequency reception signal.

16. A radio device, comprising: an antenna array, a feeder shield as claimed in any one of claims 1 to 8 or a radome as claimed in claim 14; and a signal transceiver connected to the antenna array;

wherein the antenna array comprises a transmitting antenna and a receiving antenna; the decoupling structure in the feeder shielding cover or the antenna cover is arranged between the transmitting antennas, the receiving antennas or between the transmitting antennas and the receiving antennas;

The signal receiving and transmitting device is used for transmitting detection signal waves by driving a transmitting antenna in the antenna array; receiving echo signal waves formed by reflection and/or scattering of the detection signal waves by a target through a receiving antenna in the antenna array to obtain radio frequency receiving signals; and outputting a baseband digital signal obtained by processing the radio frequency reception signal.

17. An electronic device, comprising: the radio device of claim 15 or 16; a processor connected to the radio device; and a memory coupled to the processor.