Antenna assembly and network device

Abstract

The present disclosure relates to the technical field of antennas, and provides an antenna assembly and a network device. The antenna assembly comprises a dielectric plate, a first antenna, a second antenna, a first ground plate, and a second ground plate; the first antenna is located on a first surface of the dielectric plate and close to a first end of the dielectric plate; the first ground plate is located on a second surface of the dielectric plate and close to the first end of the dielectric plate; the second antenna is located on the second surface of the dielectric plate and close to a second end of the dielectric plate; the second ground plate is located on the first surface of the dielectric plate and close to the second end of the dielectric plate. The first antenna and the second antenna jointly radiate electromagnetic waves, so that the number of radiation elements is increased. During use, currents transmitted on the first antenna and the second antenna are controlled to be in the same direction, so that the electromagnetic waves radiated outwards by the first antenna and the second antenna are in the same direction, thereby increasing the gain of the antenna assembly and / or widening the working frequency band of the antenna assembly, and thus improving the communication quality of the network device.

Description

Antenna assembly and network device

[0001] The present disclosure claims priority to the Chinese patent application No. 202421458171.4, filed on June 25, 2024, and entitled "Antenna assembly and network device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of antennas, and in particular, to an antenna assembly and a network device. BACKGROUND

[0003] Fiber to the room (FTTR) is a new networking solution that extends optical fibers to each room or office based on fiber to the building (FTTB) and fiber to the home (FTTH), so that each room or office can achieve gigabit or even terabit optical network speed, and realize full coverage of gigabit or more in the whole house. Therefore, the networking solution of FTTR needs to arrange network devices such as gateways in each room or office.

[0004] With the gradual evolution of household devices towards small and beautiful, network devices also develop towards ultra-thin and small size. On the basis of the miniaturization of network devices, how to ensure or improve the wireless communication quality of network devices is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The present disclosure provides an antenna assembly and a network device, which can improve the communication quality of the antenna assembly.

[0006] In a first aspect, the present disclosure provides an antenna assembly, comprising a dielectric plate, a first antenna, a second antenna, a first ground plate and a second ground plate;

[0007] The first antenna is located on a first surface of the dielectric plate and close to a first end of the dielectric plate along a length direction, and the first ground plate is located on a second surface of the dielectric plate and close to the first end of the dielectric plate along the length direction.

[0008] The second antenna is located on the second surface of the dielectric plate and close to a second end of the dielectric plate along the length direction, and the second ground plate is located on the first surface of the dielectric plate and close to the second end of the dielectric plate along the length direction.

[0009] In the scheme shown in the present disclosure, compared with the single antenna radiating electromagnetic wave, the common radiation of electromagnetic wave by the first antenna and the second antenna increases the number of radiation units. Then, in the application, by controlling the same direction of the current transmitted on the first antenna and the second antenna, the first antenna and the second antenna can radiate the same direction electromagnetic wave outward, and then the gain of the antenna assembly can be increased and / or the working frequency band of the antenna assembly can be widened, so as to ensure or improve the communication quality of the network equipment in a smaller size.

[0010] In a possible implementation, along the length direction of the dielectric plate, all or part of the first antenna is between the first ground plate and the first end of the dielectric plate, and all or part of the second antenna is between the second ground plate and the second end of the dielectric plate.

[0011] In the scheme shown in the present disclosure, along the length direction of the dielectric plate, all or part of the first antenna is between the first ground plate and the first end of the dielectric plate, so as to realize that all or part of the first antenna is staggered with the first ground plate in the length direction of the dielectric plate. Because if the back of the first antenna corresponds to the first ground plate, the excitation signal fed into the first antenna will flow back to the ground through the first ground plate, and then the first antenna cannot radiate electromagnetic wave outward.

[0012] Similarly, along the length direction of the dielectric plate, all or part of the second antenna is between the second ground plate and the second end of the dielectric plate, so as to realize that all or part of the second antenna is staggered with the second ground plate in the length direction of the dielectric plate.

[0013] In a possible implementation, the first antenna and / or the second antenna includes a main radiation unit and at least one auxiliary radiation unit, and the at least one auxiliary radiation unit is parallel to and connected with the main radiation unit.

[0014] The length of the connection line between each auxiliary radiation unit and the main radiation unit satisfies that the auxiliary radiation unit and the main radiation unit radiate the same direction electromagnetic wave.

[0015] In the scheme shown in the present disclosure, the auxiliary radiation unit is used to couple the excitation current on the main radiation unit. If the current coupled on the auxiliary radiation unit is in the same direction as the current on the main radiation unit, the electromagnetic wave radiated by the auxiliary radiation unit and the electromagnetic wave radiated by the main radiation unit show the enhancement phenomenon after superposition, so as to further increase the gain and / or widen the frequency band.

[0016] In a possible implementation, the main radiating element is in a strip shape, the length direction of the main radiating element is parallel to the length direction of the dielectric plate, and the auxiliary radiating element is in an L shape, the transverse part of the auxiliary radiating element is connected with the main radiating element, and the vertical part points to the middle part of the dielectric plate.

[0017] In the scheme shown in the present disclosure, because the auxiliary radiating element needs to include a part parallel to the main radiating element and a part connected with the main radiating element, the auxiliary radiating element needs to have a transverse part and a vertical part, the vertical part is used to be parallel to the main radiating element, and the transverse part is used to be connected with the main radiating element, wherein the transverse part of the auxiliary radiating element can be a straight line, a curved line, a bent line, an inclined line, or a horizontal line, in order to save arrangement space, the transverse part of the auxiliary radiating element is a horizontal straight line. Similarly, the vertical part of the auxiliary radiating element can be a straight line, an inclined line, a curved line, or a bent line, as long as it has a vertical component parallel to the main radiating element, in order to save arrangement space, the vertical part of the auxiliary radiating element is a vertical straight line.

[0018] In a possible implementation, a projection of the second antenna on the first surface of the dielectric plate is symmetrically distributed with the first antenna.

[0019] In the scheme shown in the present disclosure, because the size of the dielectric plate is limited, a part of the first antenna close to the first end of the dielectric plate is extended to the first end of the dielectric plate as much as possible, and a part of the second antenna close to the second end of the dielectric plate is extended to the second end of the dielectric plate as much as possible, in this case, the projection of the second antenna on the first surface of the dielectric plate is symmetrically distributed with the first antenna, and the first axis of symmetry is the transverse center line of the dielectric plate. In this way, the arrangement position of the dielectric plate can be used to the extreme, and the size of the dielectric plate is related to the space arranged in the network device.

[0020] In a possible implementation, the antenna assembly further includes at least one dipole antenna, both radiating elements of the dipole antenna are located on the surface of the dielectric plate, and the length direction of the two radiating elements is parallel to the length direction of the dielectric plate.

[0021] In the scheme shown in the present disclosure, each dipole antenna also functions as an antenna for radiating electromagnetic waves outward. Compared with radiating electromagnetic waves by a single antenna, the scheme of radiating electromagnetic waves by the first antenna, the second antenna and the at least one dipole antenna increases the number of radiating units. In application, the currents transmitted on the first antenna, the second antenna and the at least one dipole antenna are controlled to be in the same direction, so that the first antenna, the second antenna and the at least one dipole antenna radiate electromagnetic waves in the same direction. In this way, the gain of the antenna assembly can be increased without changing the working frequency band, or the working frequency band of the antenna assembly can be widened without changing the gain of the antenna assembly. In either case, the communication quality of the network device can be improved.

[0022] In a possible implementation, of the two radiating units of the dipole antenna, one radiating unit is located on the first surface of the dielectric plate, and the other radiating unit is located on the second surface of the dielectric plate.

[0023] In the scheme shown in the present disclosure, because the two radiating units of the dipole antenna are connected to the signal line of the feed line and the ground line of the feed line in the electrical connection relationship when radiating electromagnetic waves, and the first antenna and the first ground plate are located on different surfaces of the dielectric plate, and the second antenna and the second ground plate are also located on different surfaces of the dielectric plate. Therefore, in order to facilitate the two radiating units of the dipole antenna to couple energy from the first antenna or the second antenna, for each dipole antenna, one radiating unit can be arranged on the first surface of the dielectric plate, and the other radiating unit can be arranged on the second surface of the dielectric plate.

[0024] In a possible implementation, the number of the dipole antennas is multiple, and the multiple dipole antennas are arranged on the same side of the vertical center line of the dielectric plate along the length direction.

[0025] In the scheme shown in the present disclosure, the multiple dipole antennas are arranged on the same side of the vertical center line of the dielectric plate along the length direction. Therefore, the other side of the dielectric plate has space to arrange other structural members such as a feed network, so that the feed network is also integrated in the antenna assembly.

[0026] In a possible implementation, the antenna assembly further includes a first feed line and a second feed line, and the first feed line and the second feed line each include a signal line and a ground line.

[0027] The signal line of the first feed line is located on the first surface of the dielectric plate and connected to the first antenna, and the ground line of the first feed line is located on the second surface of the dielectric plate and connected to the first ground plate.

[0028] The signal line of the second feed line is located on the second surface of the dielectric plate and connected with the second antenna, and the ground line of the second feed line is located on the first surface of the dielectric plate and connected with the second ground plate.

[0029] In the scheme shown in the present disclosure, the antenna assembly is further integrated with a first feed line for feeding the first antenna and a second feed line for feeding the second antenna, thereby improving the integration level of the antenna assembly.

[0030] In a possible implementation, the signal line and the ground line of the first feed line are arranged in parallel, and the signal line and the ground line of the second feed line are arranged in parallel.

[0031] In the scheme shown in the present disclosure, the first signal line and the first ground line of the first feed line are parallel to each other, and the second signal line and the second ground line of the second feed line are parallel to each other. In this way, the first signal line and the first ground line form a closed loop, and the second signal line and the second ground line form a closed loop, so that the first signal line and the second signal line are only used as signal transmission lines and do not radiate electromagnetic waves outward.

[0032] In a possible implementation, the signal line of the first feed line and the ground line of the second feed line are symmetrically distributed on the first surface of the dielectric plate, and the ground line of the first feed line and the signal line of the second feed line are symmetrically distributed on the second surface of the dielectric plate.

[0033] In the scheme shown in the present disclosure, because the first signal line and the first ground line are arranged in parallel and have equal lengths, and the second signal line and the second ground plate are arranged in parallel and have equal lengths, the electrical length of the first signal line of the first feed line is equal to the electrical length of the second signal line of the second feed line, so that when the excitation signals fed into the first main radiation unit of the first antenna and the excitation signals fed into the second main radiation unit of the second antenna are in phase, the currents transmitted on the first main radiation unit and the second main radiation unit are in the same direction, thereby realizing the same direction radiation.

[0034] In a possible implementation, the electrical length of the signal line of the first feed line is equal to the electrical length of the signal line of the second feed line, and satisfies that the first antenna and the second antenna radiate same direction electromagnetic waves.

[0035] In the scheme shown in the present disclosure, the electrical length of the first signal line of the first feed line is equal to the electrical length of the second signal line of the second feed line, so that when the excitation signals fed into the first main radiation unit of the first antenna and the excitation signals fed into the second main radiation unit of the second antenna are in phase, the currents transmitted on the first main radiation unit and the second main radiation unit are in the same direction, thereby realizing the same direction radiation.

[0036] In a possible implementation, the first feeding line and the second feeding line are arranged on the same side of a vertical center line along the length direction of the dielectric plate.

[0037] In the scheme shown in the present disclosure, the first feeding line and the second feeding line are arranged on the same side of a vertical center line along the length direction of the dielectric plate, and then the opposite side of the dielectric plate can be used to arrange other structural members, such as at least one dipole antenna, so as to improve the integration degree of the antenna assembly.

[0038] In a second aspect, a network device is provided, which includes a radio frequency circuit and the antenna assembly of the first aspect, and the radio frequency circuit is configured to enable the antenna assembly to transceive wireless signals. BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 is a structural schematic diagram of a network device according to an example embodiment of the present disclosure;

[0040] FIG. 2 is an exploded structural schematic diagram of an antenna assembly according to an example embodiment of the present disclosure;

[0041] FIG. 3 is a plan structural schematic diagram of an antenna assembly according to an example embodiment of the present disclosure;

[0042] FIG. 4 is a schematic diagram with dimensions marked on (a) in FIG. 3;

[0043] FIG. 5 is a three-dimensional spherical coordinate diagram according to an example embodiment of the present disclosure;

[0044] FIG. 6 is a schematic diagram of the relationship between return loss and frequency of an antenna assembly in a high frequency band according to an example embodiment of the present disclosure;

[0045] FIG. 7 is a horizontal plane radiation pattern of an antenna assembly at a frequency point of 5.2 GHz according to an example embodiment of the present disclosure;

[0046] FIG. 8 is a horizontal plane radiation pattern of an antenna assembly at a frequency point of 5.5 GHz according to an example embodiment of the present disclosure;

[0047] FIG. 9 is a horizontal plane radiation pattern of an antenna assembly at a frequency point of 5.8 GHz according to an example embodiment of the present disclosure;

[0048] FIG. 10 is a vertical plane radiation pattern of an antenna assembly at a frequency point of 5.2 GHz according to an example embodiment of the present disclosure;

[0049] FIG. 11 is a vertical plane radiation pattern of an antenna assembly at a frequency point of 5.5 GHz according to an example embodiment of the present disclosure;

[0050] FIG. 12 is a vertical plane radiation pattern of the antenna assembly at 5.8 GHz according to an example embodiment of the present disclosure;

[0051] FIG. 13 is a graph of return loss versus frequency of the antenna assembly in a low frequency band according to an example embodiment of the present disclosure.

[0052] Reference signs 100, housing; 200, main board; 300, antenna assembly; 1, dielectric plate; 2, first antenna; 21, first main radiation unit; 22, first auxiliary radiation unit; 3, second antenna; 31, second main radiation unit; 32, second auxiliary radiation unit; 4, first ground plate; 5, second ground plate; 6a, first radiation unit; 6b, second radiation unit; 6c, third radiation unit; 6d, fourth radiation unit; 7, first feed line; 71, first signal line; 72, first ground line; 8, second feed line; 81, second signal line; 82, second ground line. DETAILED DESCRIPTION

[0053] For the purposes of the present disclosure, technical solutions and advantages, the embodiments of the present disclosure will be described in further detail below with reference to the drawings.

[0054] The present embodiment relates to an antenna assembly in a network device. The network device can be a gateway, such as a master gateway or a slave gateway, arranged in a room in an FTTR networking mode. The network device can also be a device in a passive optical network (PON) fiber access technology, such as an optical network terminal (ONT). The network device can also be a wireless local area network (WLAN) device, such as an access point (AP). The network device can also be a device that applies wireless antenna technology.

[0055] As home devices gradually evolve towards small and beautiful, network devices also develop towards ultra-thin and small size. However, the thinner the thickness of the network device and the smaller the size, the smaller the space reserved for arranging the antenna. The performance of the antenna, such as omnidirectionality, covered frequency band, and antenna gain, is related to the radiation unit of the antenna, especially the number of radiation units. Therefore, for ultra-thin and small network devices, how to ensure the communication quality or how to further improve the communication quality is a great challenge in the field.

[0056] For example, as shown in FIG. 1, which is a structural schematic diagram of a network device, FIG. 1 only shows a shell 100, a mainboard 200 and an antenna assembly 300 of the network device. Referring to FIG. 1, most of the space in the shell 100 is occupied by the mainboard 200, and only a narrow space between one side of the mainboard 200 and the inner wall of the shell 100 is reserved for arranging the antenna assembly 300. Therefore, how to arrange a high-performance antenna assembly in a small space is a great challenge in the field.

[0057] The embodiment provides an antenna assembly which can arrange more radiation units in a smaller size, and then increase the gain of the antenna assembly or widen the frequency band of the antenna assembly by transmitting signals in the same direction to the plurality of radiation units.

[0058] The antenna assembly provided by the embodiment can be applied in any network device with a relatively small size, or a network device with a relatively large size but a small space reserved for arranging an antenna. For ease of introduction, the antenna assembly is taken as an example applied in the network device shown in FIG. 1.

[0059] The antenna assembly provided by the embodiment can be an omnidirectional antenna or a directional antenna, which is mainly related to the application scenario of the network device. For example, if the antenna assembly is applied in a near-distance and large-coverage scenario, the antenna assembly can be an omnidirectional antenna; if the antenna assembly is applied in an environment with a small coverage range and a large user density, the antenna assembly can be a directional antenna.

[0060] The antenna assembly provided by the embodiment can be a transmitting antenna, a receiving antenna or a bidirectional antenna which can both transmit and receive signals.

[0061] The antenna assembly provided by the embodiment can be a single-frequency antenna or a multi-frequency antenna, and the working frequency band can be 5.15 GHz to 5.85 GHz, 2.4 GHz to 2.5 GHz or a working frequency band including a high frequency band (for example, 5.15 GHz to 5.85 GHz) and a low frequency band (for example, 2.4 GHz to 2.5 GHz).

[0062] The type of the antenna assembly is not limited in the embodiment, and the features of the antenna assembly will be introduced below.

[0063] FIG. 2 is an exploded schematic diagram of the antenna assembly, and FIG. 3 is a plan structural schematic diagram of the antenna assembly. In FIG. 3, (a) is a visible schematic diagram of a first surface (for example, a front surface) of the dielectric plate 1 in FIG. 2, and (b) is a visible schematic diagram of a second surface (for example, a back surface) of the dielectric plate 1 in FIG. 2.

[0064] Referring to FIG. 2, the antenna assembly includes a dielectric plate 1, a first antenna 2 and a first ground plate 4. The dielectric plate 1 is in a plate shape (for example, in a long strip plate shape), the first antenna 2 is located on a first surface of the dielectric plate 1 and close to a first end of the dielectric plate 1 along a length direction, and the first ground plate 4 is located on a second surface of the dielectric plate 1 and close to the first end of the dielectric plate 1.

[0065] The first surface and the second surface of the dielectric plate 1 are opposite in a thickness direction of the dielectric plate 1. For example, the first surface can be referred to as a front surface of the dielectric plate 1, and the second surface can be referred to as a back surface (or a reverse surface) of the dielectric plate 1.

[0066] In an example, the dielectric plate 1 can also be referred to as a substrate. The dielectric plate 1 can be made of FR4 (FR4 is a code of a flame-retardant material grade). The dielectric plate 1 can have a relative dielectric constant of 4.4, a loss tangent of 0.0025, and a thickness of 1.6 mm. Of course, the relative dielectric constant, the loss tangent, and the thickness of the dielectric plate 1 can also be selected as other values, and the present embodiment does not make a specific limitation on this.

[0067] In this way, a feed line feeding a signal to the first antenna 2 is connected to the first antenna 2, the first ground plate 4 is grounded, and an antenna radiating electromagnetic waves outward is formed.

[0068] Referring to FIG. 2, the antenna assembly further includes a second antenna 3 and a second ground plate 5. The second antenna 3 is located on the second surface of the dielectric plate 1 and close to a second end of the dielectric plate 1 along the length direction. The second ground plate 5 is located on the first surface of the dielectric plate 1 and close to the second end of the dielectric plate 1.

[0069] In this way, a feed line feeding a signal to the second antenna 3 is connected to the second antenna 3, the second ground plate 5 is grounded, and an antenna radiating electromagnetic waves outward is formed.

[0070] Compared with a single antenna radiating electromagnetic waves, the common radiation of electromagnetic waves by the first antenna 2 and the second antenna 3 increases the number of radiation units. Then, in application, by controlling the vector directions of excitation signals fed to the first antenna 2 and the second antenna 3 to be the same (i.e., in the same direction), the gain of the antenna assembly can be increased under the condition that the working frequency band is basically unchanged, or the working frequency band of the antenna assembly can be widened under the condition that the gain of the antenna assembly is basically unchanged. No matter which adjustment is made, the communication quality of the network device can be improved.

[0071] In the application, the phase relationship between the excitation signal fed into the first antenna 2 and the excitation signal fed into the second antenna 3 can be adjusted by adjusting the relationship between the electrical length between the feed point of the first antenna 2 and the first antenna 2 and the electrical length between the feed point of the second antenna 3 and the second antenna 3, such as equal electrical length, realizing the same direction of the fed current, the size relationship will be described in detail below after introducing the feed line.

[0072] In the embodiment, the electrical length refers to the ratio of the physical length of the microstrip transmission line to the wavelength of the electromagnetic wave transmitted, and the concept of electrical length is very important in electromagnetic wave propagation, which directly affects the signal propagation speed, phase change, and impedance matching of the transmission line and other characteristics. Therefore, the sizes related to the phase and impedance matching characteristics in the embodiment are electrical lengths unless otherwise specified.

[0073] In an example, as described above, one of the first antenna 2 and the first ground plate 4 is on the front surface of the dielectric plate 1, and the other is on the back surface of the dielectric plate 1, but both are close to the first end of the dielectric plate 1, one of the second antenna 3 and the second ground plate 5 is on the front surface of the dielectric plate 1, and the other is on the back surface of the dielectric plate 1, but both are close to the second end of the dielectric plate 1. Such an arrangement can facilitate feeding the first antenna 2 and the second antenna 3. For example, a double-line feed line including a signal line and a ground line extends to the vicinity of the first end of the dielectric plate 1, the signal line of the double-line feed line is electrically connected to the first antenna 2, and the ground line of the double-line feed line is electrically connected to the first ground plate 4. Another double-line feed line extends to the vicinity of the second end of the dielectric plate 1, the signal line of the double-line feed line is electrically connected to the second antenna 3, and the ground line of the double-line feed line is electrically connected to the second ground plate 5.

[0074] In an example, as described above, the first antenna 2 and the first ground plate 4 are both close to the first end of the dielectric plate 1, for example, as shown in (a) of FIG. 3 and (b) of FIG. 3, all or part of the first antenna 2 is between the first ground plate 4 and the first end of the dielectric plate 1 in the length direction of the dielectric plate 1.

[0075] In the length direction of the dielectric plate 1, all or part of the first antenna 2 is between the first ground plate 4 and the first end of the dielectric plate 1, so as to realize that all or part of the first antenna 2 is staggered with the first ground plate 4 in the length direction of the dielectric plate 1. This is because if the back of the first antenna 2 corresponds to the first ground plate 4 entirely, the excitation signal fed into the first antenna 2 will flow back to the ground through the first ground plate 4, so that the first antenna 2 cannot radiate electromagnetic waves outward. Therefore, in the length direction of the dielectric plate 1, the part of the first antenna 2 that does not correspond to the first ground plate 4, that is, the part staggered with the first ground plate 4, is the part of the first antenna 2 used to radiate electromagnetic waves. As shown in (b) of FIG. 3, the part of the first antenna 2 shown in the dashed box is used to radiate electromagnetic waves outward.

[0076] Similarly, referring to (a) of FIG. 3 and (b) of FIG. 3, in the length direction of the dielectric plate 1, all or part of the second antenna 3 is between the second ground plate 5 and the second end of the dielectric plate 1. As shown in (b) of FIG. 3, the part of the second antenna 3 shown in the dashed box is used to radiate electromagnetic waves outward.

[0077] In an example, regarding the positional relationship between the first antenna 2 and the second antenna 3, for example, referring to (a) of FIG. 3 and (b) of FIG. 3, the projection of the second antenna 3 on the first surface of the dielectric plate 1 is symmetrically distributed with the first antenna 2. The symmetry axis (denoted as the first symmetry axis) can be the transverse center line of the dielectric plate 1 in the width direction of the first surface, of course, the first symmetry axis can not be the transverse center line, but is parallel to the transverse center line, and the present embodiment does not limit this.

[0078] However, due to the limited size of the dielectric plate 1, referring to (a) of FIG. 3, the part of the first antenna 2 close to the first end of the dielectric plate 1 extends to the first end of the dielectric plate 1 as much as possible, and referring to (b) of FIG. 3, the part of the second antenna 3 close to the second end of the dielectric plate 1 extends to the second end of the dielectric plate 1 as much as possible. In this case, the projection of the second antenna 3 on the first surface of the dielectric plate 1 is symmetrically distributed with the first antenna 2, and the first symmetry axis is the transverse center line of the dielectric plate 1. In this way, the arrangement position of the dielectric plate 1 can be used to the extreme, and the size of the dielectric plate 1 is related to the space arranged in the network device.

[0079] In an example, with respect to the positional relationship between the first ground plate 4 and the second ground plate 5, for example, referring to (a) in FIG. 3 and (b) in FIG. 3, the projection of the first ground plate 4 on the first surface of the dielectric plate 1 is symmetrically distributed with the second ground plate 5. Wherein, the axis of symmetry (denoted as the second axis of symmetry) can be the transverse center line of the dielectric plate 1 in the width direction of the first surface, of course, the second axis of symmetry can not be the transverse center line, but is parallel to the transverse center line, and the present embodiment does not limit this.

[0080] In an example, the first axis of symmetry and the second axis of symmetry described above can coincide, so that, referring to FIG. 3, the spacing between the first antenna 2 and the second ground plate 5 is equal to the spacing between the second antenna 3 and the first ground plate 4, so that, if the length of the dielectric plate 1 allows, other structures can be arranged in the spacing, for example, referring to FIG. 3, a feed network is arranged, which will be described in detail later when introducing the feed network.

[0081] In an example, the type of the first antenna 2 and the type of the second antenna 3 are mainly related to the type of the antenna assembly. For example, if the antenna assembly is an omnidirectional antenna, then the first antenna 2 and the second antenna 3 can both be omnidirectional antennas capable of exhibiting 360° uniform electromagnetic wave radiation in the horizontal direction, for example, the first antenna 2 and the second antenna 3 can both be monopole antennas. Of course, it can also be that the first antenna 2 is an omnidirectional antenna and the second antenna 3 is a directional antenna, or the first antenna 2 is a directional antenna and the second antenna 3 is an omnidirectional antenna, or the first antenna 2 and the second antenna 3 are both directional antennas, but the first antenna 2 and the second antenna 3 exhibit an omnidirectional antenna after superposition. Wherein, the present embodiment does not limit the antenna type of the first antenna 2 and the second antenna 3, taking the monopole antenna example shown in (a) in FIG. 3 and (b) in FIG. 3.

[0082] Continuing to refer to FIG. 3, the first antenna 2 includes a main radiation unit (denoted as the first main radiation unit 21), and the second antenna 3 also includes a main radiation unit (denoted as the second main radiation unit 31). Wherein, the size of the first main radiation unit 21 and the second main radiation unit 31 can be equal or not equal, and for the convenience of introduction, the example of equal size is taken.

[0083] In an example, the main radiating elements of the first antenna 2 and the second antenna 3 are in the shape of a long strip, and are arranged on the dielectric board 1 in such a way that the length direction of the first main radiating element 21 is parallel to the length direction of the dielectric board 1, as shown in (a) of FIG. 3, the first main radiating element 21 is arranged vertically on the first surface of the dielectric board 1, and one end of the first main radiating element 21 extends to the first end of the dielectric board 1 as far as possible, and the other end of the first main radiating element 21 is used for connection with the feed line. Similarly, the length direction of the second main radiating element 31 is parallel to the length direction of the dielectric board 1, as shown in (b) of FIG. 3, the second main radiating element 31 is arranged vertically on the second surface of the dielectric board 1, and one end of the second main radiating element 31 extends to the second end of the dielectric board 1 as far as possible, and the other end of the second main radiating element 31 is used for connection with the feed line.

[0084] The length (referring to the electrical length) of the main radiating element of the first antenna 2 and the second antenna 3 is related to the working frequency band of the antenna assembly. The width (also the electrical length) of the main radiating element is related to the impedance matching of the feed network.

[0085] Taking the working frequency band of the antenna assembly as an example of 5.15GHz to 5.85GHz, as shown in FIG. 4, the length L2 of the main radiating element is in the range of 25mm to 28mm, for example, simulation verification shows that the length L2 of the main radiating element is 26mm, and the antenna assembly has better antenna performance. Wherein, the better antenna performance mainly reflects a wider working frequency band (such as covering 5.15GHz to 5.85GHz), and / or a larger antenna gain (such as greater than 10dB). Wherein, FIG. 4 is a schematic diagram of dimension marking of (a) of FIG. 3.

[0086] It should be noted that in the subsequent description of the range of values of the dimensions, unless otherwise specified, the working frequency band of the antenna assembly is taken as an example of 5.15GHz to 5.85GHz.

[0087] Continuing to refer to FIG. 4, the width W3 of the main radiating element is in the range of 2mm to 3mm, and under this range of values, the first antenna 2 and the feed network have better impedance matching and smaller return loss, and the second antenna 3 and the feed network have better impedance matching and smaller return loss. For example, simulation verification shows that the width W3 of the main radiating element is 2.6mm, and the antenna assembly has smaller return loss (such as less than -10dB) in the working frequency band.

[0088] In one example, in order to further increase the gain of the antenna assembly, and / or, to broaden the working frequency band of the antenna assembly, referring to (a) of FIG. 3, the first antenna 2 comprises not only the main radiating unit (denoted as the first main radiating unit 21), but also at least one auxiliary radiating unit (denoted as the first auxiliary radiating unit 22), and the at least one first auxiliary radiating unit 22 is parallel to and connected with the first main radiating unit 21. The length of the transverse connecting line between each first auxiliary radiating unit 22 and the first main radiating unit 21 satisfies the same direction of the current transmitted on the first auxiliary radiating unit 22 and the first main radiating unit 21, so that the first main radiating unit 21 and the first auxiliary radiating unit 22 radiate electromagnetic waves in the same direction. The transverse connecting line can be a straight line or a curve. In the figure, a straight line is shown as an example.

[0089] The first auxiliary radiating unit 22 is used to couple the excitation current on the first main radiating unit 21. If the current coupled on the first auxiliary radiating unit 22 is in the same direction as the current on the first main radiating unit 21, then the electromagnetic waves radiated by the first auxiliary radiating unit 22 and the electromagnetic waves radiated by the first main radiating unit 21 show an enhancement phenomenon after superposition, thereby further increasing the gain and / or broadening the frequency band.

[0090] In one example, regarding the number of the first auxiliary radiating unit 22, referring to (a) of FIG. 3, two symmetrical first auxiliary radiating units 22 (denoted as a pair of first auxiliary radiating units 22) can be arranged on the left and right of the first main radiating unit 21. The left and right of the first main radiating unit 21 are in the left and right along the width direction of the dielectric plate 1. The two first auxiliary radiating units 22 are symmetrically distributed, and the symmetry axis of the two first auxiliary radiating units 22 is the vertical center line of the dielectric plate 1 along the z-axis, as shown in (a) of FIG. 3. If the vertical center line of the first main radiating unit 21 on the z-axis coincides with the vertical center line of the dielectric plate 1 on the z-axis, then the symmetry axis of the two first auxiliary radiating units 22 located on the left and right sides of the first main radiating unit 21 is the vertical center line of the first main radiating unit 21.

[0091] In the case that the width of the dielectric plate 1 along the y-axis is allowed, that is, in the case that the width of the dielectric plate 1 is relatively large, the vertical center line of the first main radiating unit 21 on the z-axis can also not coincide with the vertical center line of the dielectric plate 1 on the z-axis.

[0092] Continuing to refer to (a) of FIG. 3, a plurality of pairs of first auxiliary radiating elements 22 can be arranged on the left and right sides of the first main radiating element 21, and each pair of first auxiliary radiating elements 22 is symmetrically distributed about the vertical center line of the dielectric plate 1. For example, referring to (a) of FIG. 3, two pairs of first auxiliary radiating elements 22 are arranged, and one pair of symmetrically distributed first auxiliary radiating elements 22 is mainly used to improve the antenna performance in the high frequency band (such as 5.15 GHz to 5.85 GHz), and the other pair of symmetrically distributed first auxiliary radiating elements 22 is mainly used to improve the antenna performance in the low frequency band (such as 2.4 GHz to 2.5 GHz).

[0093] Of course, the two first auxiliary radiating elements 22 in each pair of first auxiliary radiating elements 22 can also be asymmetrically distributed, and the symmetrically distributed example is introduced for convenience.

[0094] In an example, since the auxiliary radiating element needs to include a portion parallel to the main radiating element and a portion connected to the main radiating element, the first auxiliary radiating element 22 needs to have a horizontal portion and a vertical portion, the vertical portion is used to be parallel to the first main radiating element 21, and the horizontal portion is used to be connected to the first main radiating element 21, wherein the horizontal portion of the first auxiliary radiating element 22 can be a straight line, a curved line, a bent line, an inclined line, or a horizontal line. In order to save arrangement space, the horizontal portion of the first auxiliary radiating element 22 is a horizontal straight line. Similarly, the vertical portion of the first auxiliary radiating element 22 can be a straight line, an inclined line, a curved line, or a bent line, as long as it has a vertical component parallel to the first main radiating element 21. In order to save arrangement space, the vertical portion of the first auxiliary radiating element 22 is a vertical straight line.

[0095] Referring to (a) of FIG. 3, the shape of the first auxiliary radiating element 22 can be L-shaped, the first auxiliary radiating element 22 includes a horizontal portion and a vertical portion, the horizontal portion of the first auxiliary radiating element 22 is connected to the first main radiating element 21, and the vertical portion of the first auxiliary radiating element 22 points to the middle of the dielectric plate 1.

[0096] The vertical portion of the first auxiliary radiating element 22 points to the middle of the dielectric plate 1, in order to not increase the length of the dielectric plate 1, because if the vertical portion of the first auxiliary radiating element 22 points to the first end of the dielectric plate 1, the length of the dielectric plate 1 needs to be lengthened.

[0097] In an example, in order to enable the first auxiliary radiating unit 22 to radiate electromagnetic waves, reference is made to FIG. 4, in which the length L3 of one pair of first auxiliary radiating units 22 ranges from 8.5 mm to 9.5 mm, and the length L4 of the other pair of first auxiliary radiating units 22 ranges from 3 mm to 4 mm. Simulation verifies that L3 is 9 mm and L4 is 3.5 mm, and the antenna assembly has better antenna performance.

[0098] In an example, since the first main radiating unit 21 is a unit for mainly radiating electromagnetic waves, and the first auxiliary radiating unit 22 is a unit for secondarily radiating electromagnetic waves, the line width (the line width is the dimension along the width direction of the dielectric plate 1) of the first main radiating unit 21 is greater than the line width (the line width is the dimension along the width direction of the dielectric plate 1) of the first auxiliary radiating unit 22. For example, reference is made to FIG. 4, in which the line width W4 of the two pairs of first auxiliary radiating units 22 is equal, and W4 ranges from 0.5 mm to 1.5 mm. Simulation verifies that W4 is 1 mm, and the antenna assembly has better antenna performance.

[0099] In an example, as described above, the length of the transverse line between each first auxiliary radiating unit 22 and the first main radiating unit 21 satisfies that the current transmitted on the first auxiliary radiating unit 22 and the current transmitted on the first main radiating unit 21 are in the same direction, so that the electromagnetic waves are radiated in the same direction. The length of the transverse line between the first auxiliary radiating unit 22 and the first main radiating unit 21 is the length of the transverse portion of the first auxiliary radiating unit 22.

[0100] In which, the phase difference between the current transmitted on the first auxiliary radiating unit 22 and the current transmitted on the first main radiating unit 21 is mainly related to the length of the transverse portion of the first auxiliary radiating unit 22.

[0101] Therefore, by adjusting the length of the transverse portion of the first auxiliary radiating unit 22, the current transmitted on the first auxiliary radiating unit 22 and the current transmitted on the first main radiating unit 21 can be in the same direction, and the electromagnetic waves radiated by the first auxiliary radiating unit 22 and the electromagnetic waves radiated by the first main radiating unit 21 can be in the same direction. The electromagnetic waves of the two are superimposed to show the effect of increased amplitude.

[0102] For example, referring to FIG. 4, the sum of the transverse portions of the pair of first auxiliary radiating elements 22 is the difference between W1 and W3. If the vertical center line of the dielectric plate 1 coincides with the vertical center line of the first main radiating element 21, the transverse portion of the first auxiliary radiating element 22 is (W1-W3) / 2. If the vertical center line of the dielectric plate 1 on the z-axis does not coincide with the vertical center line of the first main radiating element 21 on the z-axis, referring to FIG. 4, the values of the transverse portions of the two first auxiliary radiating elements 22 in the pair of first auxiliary radiating elements 22 can be adjusted based on the arrangement of other structural elements on the surface of the dielectric plate 1 (such as based on the arrangement of the dipole antenna and the feed network on the surface of the dielectric plate 1) and the simulation of the same-direction superposition effect.

[0103] For example, W1, i.e., the width of the dielectric plate 1, can be 12 mm. The width of the dielectric plate 1, referring to FIG. 1, is related to the distance between the inner wall of the shell 100 and the side of the mainboard 200 in the network device. For example, the width of the dielectric plate 1 is less than or equal to the distance between the inner wall of the shell 100 and the side of the mainboard 200.

[0104] In an example, the width (i.e., line width) of the transverse portion of the first auxiliary radiating element 22 can be equal to the width (i.e., line width) of the vertical portion, and of course, can not be equal. For example, referring to FIG. 4, the transverse portions of the two pairs of first auxiliary radiating elements 22 are both W2, and the value of W2 can be in the range of 2 mm to 3 mm. It is verified by simulation that W2 is 1.5 mm, and the antenna performance of the antenna assembly is better.

[0105] The above is the introduction of the features of the first antenna 2 including the main radiating element and the plurality of auxiliary radiating elements. The second antenna 3 can also include the main radiating element (denoted as the second main radiating element 31) and at least one auxiliary radiating element (denoted as the second auxiliary radiating element 32). Of course, the second antenna 3 can only include the second main radiating element 31 and not include the second auxiliary radiating element 32.

[0106] Referring to (b) in FIG. 3, the second antenna 3 not only includes the second main radiating element 31, but also includes a plurality of second auxiliary radiating elements 32. The introduction of the second auxiliary radiating element 32 can refer to the above introduction of the first auxiliary radiating element 22, and the introduction of the relationship between the second auxiliary radiating element 32 and the second main radiating element 31 can refer to the above introduction of the relationship between the first auxiliary radiating element 22 and the first main radiating element 21, which will not be repeated here.

[0107] However, it is pointed out that if the projection of the second antenna 3 on the first surface of the dielectric plate 1 is symmetrical to the first antenna 2, the size of the second auxiliary radiation unit 32 is equal to the size of the first auxiliary radiation unit 22, and the size of the first main radiation unit 21 is equal to the size of the second main radiation unit 31. If the projection of the second antenna 3 on the first surface of the dielectric plate 1 is not symmetrical to the first antenna 2, the size of the second auxiliary radiation unit 32 can be equal to or not equal to the size of the first auxiliary radiation unit 22, and the size of the first main radiation unit 21 can be equal to or not equal to the size of the second main radiation unit 31.

[0108] In an example, in the case that there is a free area on the surface of the dielectric plate 1, in order to further improve the performance of the antenna assembly, the antenna assembly further comprises at least one dipole antenna. Referring to FIG. 3, the first radiation unit 6a and the second radiation unit 6b constitute a dipole antenna, which is referred to as a first dipole antenna, and the third radiation unit 6c and the fourth radiation unit 6d constitute another dipole antenna, which is referred to as a second dipole antenna. Each dipole antenna has two radiation units on the surface of the dielectric plate 1, and the length direction of the two radiation units is parallel to the length direction of the dielectric plate 1.

[0109] The number of dipole antennas is related to the free area of the dielectric plate 1, and as many dipole antennas as possible can be arranged without expanding the size of the dielectric plate 1.

[0110] In this way, each dipole antenna also serves as an antenna for radiating electromagnetic waves outward. Compared with the single antenna radiating electromagnetic waves, the number of radiation units is increased by the common radiation of electromagnetic waves through the first antenna 2, the second antenna 3 and the at least one dipole antenna. Therefore, in the application, the currents transmitted on the first antenna 2, the second antenna 3 and the at least one dipole antenna are controlled to be the same direction, so that the first antenna 2, the second antenna 3 and the at least one dipole antenna radiate electromagnetic waves in the same direction, thereby increasing the gain of the antenna assembly while keeping the working frequency band basically unchanged, or widening the working frequency band of the antenna assembly while keeping the gain of the antenna assembly basically unchanged. No matter which adjustment, the communication quality of the network equipment is improved.

[0111] The following takes two dipole antennas as examples, as shown in FIG. 3, a first dipole antenna and a second dipole antenna, wherein the first dipole antenna comprises two symmetrically distributed radiation units, denoted as a first radiation unit 6a and a second radiation unit 6b respectively, and the symmetry axes of the first radiation unit 6a and the second radiation unit 6b are along the width direction of the dielectric plate 1. Similarly, the second dipole antenna comprises two symmetrically distributed radiation units, denoted as a third radiation unit 6c and a fourth radiation unit 6d respectively, and the symmetry axes of the third radiation unit 6c and the fourth radiation unit 6d are along the width direction of the dielectric plate 1.

[0112] In an example, the current on the dipole antenna can be the current coupled from the first antenna 2 or the current coupled from the second antenna 3. Therefore, the feed network of the antenna assembly does not need to be fed to the dipole antenna, and the arrangement of the antenna assembly can be simplified.

[0113] In an example, the first radiation unit 6a and the second radiation unit 6b can be arranged on the same surface of the dielectric plate 1, for example, both on the first surface or both on the second surface.

[0114] In another example, the first radiation unit 6a and the second radiation unit 6b can be arranged on different surfaces of the dielectric plate 1, for example, one on the first surface and the other on the second surface.

[0115] For the dipole antenna, because in the process of radiating electromagnetic waves, the two radiation units are in an electrical connection relationship, one radiation unit is connected to the signal line of the feed line, and the other radiation unit is connected to the ground line of the feed line, and the first antenna 2 and the first ground plate 4 are located on different surfaces of the dielectric plate 1, and the second antenna 3 and the second ground plate 5 are also located on different surfaces of the dielectric plate 1. Therefore, in order to facilitate the two radiation units of the dipole antenna to couple energy from the first antenna 2 or from the second antenna 3, correspondingly, for each dipole antenna, one of its radiation units can be arranged on the first surface of the dielectric plate 1, and the other of its radiation units can be arranged on the second surface of the dielectric plate 1.

[0116] For example, referring to (a) in FIG. 3, the first radiation unit 6a of the first dipole antenna is located on the first surface of the dielectric plate 1, and referring to (b) in FIG. 3, the second radiation unit 6b of the first dipole antenna is located on the second surface of the dielectric plate 1.

[0117] It should be noted that, as shown in (a) of FIG. 3, whether the first radiation unit 6a of the first dipole antenna is connected to the first signal line 71 of the first feed line 7 by a metal wire or not is acceptable. The connection can improve the coupling degree, and the connection position can be determined by simulation. As shown in (b) of FIG. 3, whether the second radiation unit 6b of the first dipole antenna is connected to the first ground line 72 of the first feed line 7 by a metal wire or not is also acceptable.

[0118] Similarly, as shown in (b) of FIG. 3, the third radiation unit 6c of the second dipole antenna is located on the second surface of the dielectric plate 1, and as shown in (a) of FIG. 3, the fourth radiation unit 6d of the second dipole antenna is located on the first surface of the dielectric plate 1. As shown in (b) of FIG. 3, whether the third radiation unit 6c of the second dipole antenna is connected to the second signal line 81 of the second feed line 8 by a metal wire or not is acceptable. The connection can improve the coupling degree, and the connection position can be determined by simulation. As shown in (a) of FIG. 3, whether the fourth radiation unit 6d of the second dipole antenna is connected to the second ground line 82 of the second feed line 8 by a metal wire or not is also acceptable.

[0119] Regarding the size characteristics of the dipole antenna. As shown in FIG. 3 and referring to FIG. 4, the length L5 of the first radiation unit 6a ranges from 9.5 mm to 10.5 mm, the length L8 of the second radiation unit 6b ranges from 8.5 mm to 9.5 mm, the line width of the first radiation unit 6a is equal to the line width of the second radiation unit 6b, denoted as W5, and the value of W5 ranges from 1.5 mm to 2.5 mm. Simulation verification shows that the antenna performance of the antenna assembly is better when L5 is 10 mm, L8 is 9 mm, and W5 is 2 mm.

[0120] The third radiation unit 6c has the same structure and size as the first radiation unit 6a, so the length of the third radiation unit 6c can be referred to the length of the first radiation unit 6a. The fourth radiation unit 6d has the same structure and size as the second radiation unit 6b, so the length of the fourth radiation unit 6d can be referred to the length of the second radiation unit 6b, and the details are not repeated.

[0121] Continuing to refer to FIG. 4, if the first radiation unit 6a is connected to the signal line of the feed line by a metal wire, the line width W8 of the metal wire can range from 0.5 mm to 1 mm. Simulation verification shows that the antenna performance of the antenna assembly is better when W8 is 0.5 mm. The line width of the metal wire is the dimension along the width direction of the dielectric plate 1.

[0122] In one example, as mentioned above, the number of dipole antennas can be multiple, in the case of multiple, the multiple dipole antennas are arranged on the same side of the vertical center line of the dielectric plate 1 along the length direction, for example, as shown in FIG. 3, both of the two dipole antennas are arranged on the first side of the vertical center line of the dielectric plate 1, the first side is also the side of the dielectric plate 1 in the negative direction of the y-axis. Wherein, the coordinate system is shown in FIG. 1, taking the vertical center line of the dielectric plate 1 as the z-axis, the bottom surface as the xoy plane, and the thickness direction as the x-axis and the width direction as the y-axis.

[0123] In this way, the second side of the vertical center line of the dielectric plate 1 also has a certain space for arranging other structural members, wherein the second side is also the side of the dielectric plate 1 in the positive direction of the y-axis.

[0124] For example, the second side of the vertical center line of the dielectric plate 1 can be arranged with a feed network. As shown in FIG. 3, the feed network includes a first feed line 7 and a second feed line 8, wherein the first feed line 7 is used to feed the first antenna 2, and the second feed line 8 is used to feed the second antenna 3. Continue to refer to FIG. 3, the first feed line 7 and the second feed line 8 are both located on the same side of the vertical center line of the dielectric plate 1 along the length direction, such as both on the second side of the vertical center line of the dielectric plate 1.

[0125] Wherein, the first feed line 7 and the second feed line 8 are both double-line feed lines, including a signal line and a ground line, as shown in FIG. 3, the signal line of the first feed line 7 is denoted as the first signal line 71, and the ground line is denoted as the first ground line 72, the signal line of the second feed line 8 is denoted as the second signal line 81, and the ground line is denoted as the second ground line 82.

[0126] Since the signal line is used to connect with the antenna, and the ground line is used to connect with the ground plate, as shown in FIG. 3, the first signal line 71 of the first feed line 7 is located on the first surface of the dielectric plate 1 and connected with the first antenna 2, the first ground line 72 of the first feed line 7 is located on the second surface of the dielectric plate 1 and connected with the first ground plate 4, the second signal line 81 of the second feed line 8 is located on the second surface of the dielectric plate 1 and connected with the second antenna 3, and the second ground line 82 of the second feed line 8 is located on the first surface of the dielectric plate 1 and connected with the second ground plate 5.

[0127] In one example, in order to avoid the signal line of the feed line radiating electromagnetic waves outwardly and affecting the performance of the antenna of the antenna assembly, accordingly, as shown in FIG. 3, the first signal line 71 and the first ground line 72 of the first feed line 7 are parallel to each other, and the second signal line 81 and the second ground line 82 of the second feed line 8 are parallel to each other. In this way, the first signal line 71 and the first ground line 72 form a closed loop, and the second signal line 81 and the second ground line 82 form a closed loop, so that the first signal line 71 and the second signal line 81 are only used as signal transmission lines and do not radiate electromagnetic waves outwardly.

[0128] Continuing to refer to FIG. 3, the first signal lines 71 of the first feed line 7 and the second ground lines 82 of the second feed line 8 are symmetrically distributed on the first surface of the dielectric plate 1, and the first ground lines 72 of the first feed line 7 and the second signal lines 81 of the second feed line 8 are symmetrically distributed on the second surface of the dielectric plate 1. In this way, since the first signal lines 71 and the first ground lines 72 are arranged in parallel and have equal lengths, and the second signal lines 81 and the second ground lines 82 are arranged in parallel and have equal lengths, the electrical length of the first signal lines 71 of the first feed line 7 is equal to the electrical length of the second signal lines 81 of the second feed line 8, so that when the excitation signals fed into the first main radiating unit 21 of the first antenna 2 and the second main radiating unit 31 of the second antenna 3 are in phase, the currents transmitted on the first main radiating unit 21 and the second main radiating unit 31 are in the same direction, thereby realizing the same direction radiation.

[0129] Further, the electromagnetic waves radiated by the first main radiating unit 21 and the second main radiating unit 31 interfere constructively, thereby realizing the widening of the working frequency band and / or the increase of the gain, and improving the performance of the antenna assembly.

[0130] In an example, regarding the size characteristics of the first feed line 7 and the second feed line 8. Since the size of the dielectric plate 1 is limited and the lengths of the first feed line 7 and the second feed line 8 are relatively long, referring to FIG. 3, the first feed line 7 and the second feed line 8 are arranged in a bent state on the surface of the dielectric plate 1, for example, the first signal lines 71 and the second ground lines 82 are arranged in a bent state on the first surface of the dielectric plate 1, and the second signal lines 81 and the first ground lines 72 are arranged in a bent state on the second surface of the dielectric plate 1. The bent shape can be a square wave shape. Of course, it can also be a wave shape, and can also be a sawtooth shape, etc., and the present embodiment does not limit the bent shape, and takes the square wave shape as an example.

[0131] Referring to FIG. 4, the line width of the first signal lines 71, the line width of the first ground lines 72, the line width of the second signal lines 81, and the line width of the second ground lines 82 can all be equal. Since the first feed line 7 and the second feed line 8 are arranged in a bent state, referring to FIG. 4, the width W6 of the first signal lines 71, the second signal lines 81, the first ground lines 72, and the second ground lines 82 in the width direction of the dielectric plate 1 has a value range of 1mm to 2mm, and the width W7 of the first signal lines 71, the second signal lines 81, the first ground lines 72, and the second ground lines 82 in the length direction of the dielectric plate 1 has a value range of 0.5mm to 1mm. Simulation verification shows that when W6 is 1.5mm and W7 is 0.9mm, the antenna performance of the antenna assembly is better.

[0132] Since the first feed line 7 and the second feed line 8 are arranged in a square waveform on the surface of the dielectric substrate 1, referring to Figure 4, the length L6 along the length direction of the dielectric substrate 1 ranges from 2mm to 3mm, and the length L10 ranges from 1.5mm to 2.5mm. Simulation verification shows that when L6 is 2.8mm and L10 is 2mm, the antenna performance of this antenna assembly is good.

[0133] In one example, the feed point of the feed network can be located in the middle of the dielectric substrate 1. This feed point is connected to an external radio frequency circuit and can also be referred to as the feed port or feed interface of the antenna assembly. Referring to Figure 4, the dimension L11 of the feed point along the length of the dielectric substrate 1 can range from 2.5 mm to 3.5 mm, and the dimension L7 of the feed point along the length of the dielectric substrate 1 can range from 9 mm to 10 mm. Simulation results show that with L11 of 3 mm and L7 of 9.8 mm, the antenna performance of this antenna assembly is good.

[0134] Referring to Figure 4, the length of the first grounding plate 4 along the length direction of the medium plate 1 is equal to the length of the second grounding plate 5 along the length direction of the medium plate 1, denoted as L9. The value of L9 can be from 10.5mm to 11.5mm. The width of the first grounding plate 4 along the width direction of the medium plate 1 is equal to the width of the second grounding plate 5 along the width direction of the medium plate 1, both being equal to the width W1 of the medium plate 1.

[0135] Referring to Figure 4, the length L1 of the medium board 1 is 102 mm. The length L1 of the medium board 1 is related to the height of the network device. For example, referring to Figure 1, the length of the medium board 1 is close to the height of the network device on the z-axis.

[0136] The simulation results of the antenna assembly shown in Figure 3 are presented below.

[0137] The data used in the simulation can be found in Table 1 below.

[0138] Table 1

[0139] The simulation results will include the antenna pattern. To facilitate understanding, the following terms will be explained.

[0140] The radiation pattern, also known as a lobe pattern, is a three-dimensional quantity describing the field or power as a function of the three-dimensional spherical coordinates θ and φ. As shown in FIG. 5, the three-dimensional spherical coordinates are shown, and as shown in FIG. 5, φ is the angle of rotation from the positive z-axis to the projection line in the xoy plane (i.e., the horizontal plane) in the three-dimensional spherical coordinate system.

[0141] As shown in FIG. 6, a schematic diagram of the return loss of the antenna assembly versus frequency in the high frequency band is shown. The return loss of the antenna is used to represent the impedance matching between the antenna assembly and the feed network. The smaller the return loss, the better the surface impedance matching. Generally, the frequency band corresponding to the range of return loss less than -10 dB is the frequency band in which the antenna assembly can work. As shown in FIG. 6, the high frequency operating frequency band of the antenna assembly is 5.09 GHz to 5.97 GHz.

[0142] As shown in FIGS. 7 to 9, the horizontal plane radiation patterns of the antenna assembly at 5.2 GHz, 5.5 GHz, and 5.8 GHz, respectively, are shown. As shown in FIGS. 10 to 12, the vertical plane radiation patterns of the antenna assembly at 5.2 GHz, 5.5 GHz, and 5.8 GHz, respectively, are shown. As can be seen from FIGS. 7 to 9, the peak gain of the horizontal plane gain curve of the antenna assembly in the wideband is greater than 7 dBi, the angle greater than 4 dBi is greater than 200°, and the minimum gain is greater than -3 dBi. As can be seen from FIGS. 10 to 12, the side lobe level of the antenna in the vertical plane in the bandwidth is low, all less than -1 dBi.

[0143] As shown in FIG. 13, a schematic diagram of the return loss of the antenna assembly versus frequency in the low frequency band is shown. As shown in FIG. 13, the antenna assembly has good horizontal quasi-omnidirectional radiation characteristics in the low frequency band of 2.4 GHz to 2.5 GHz.

[0144] Therefore, the antenna assembly has high gain radiation at a small size. For example, when the size of the dielectric plate 1 is 102 x 12 x 1.6 mm 3 , the highest gain of the antenna assembly in the high frequency band (5.15 GHz to 5.85 GHz) is greater than 7 dBi. The antenna assembly also has low clearance quasi-omnidirectional radiation. For example, when the clearance is 10 mm, the minimum gain of the antenna assembly in the high frequency band (5.15 GHz to 5.85 GHz) is greater than -3 dBi, the minimum gain in the low frequency band (2.4 GHz to 2.5 GHz) is greater than -5 dBi, and quasi-omnidirectional radiation is achieved. The clearance is the distance between the antenna assembly 300 and the main board 200 as shown in FIG. 1.

[0145] Based on the above, the antenna assembly first comprises the arrangement of the first antenna 2 and the second antenna 3, and in addition, the first antenna 2 and the second antenna 3 not only comprise the main radiation unit, but also comprise the auxiliary radiation unit, the current transmitted on the main radiation unit and the auxiliary radiation unit is in the same direction, and in addition, the antenna assembly further comprises the dipole antenna, so that the antenna assembly comprises more radiation units, such as the main radiation unit and at least one auxiliary radiation unit of the first antenna, the main radiation unit and at least one auxiliary radiation unit of the second antenna, and at least one dipole antenna, which are all radiation units radiating electromagnetic waves outward, and the number of the radiation units is more, which can compress the wave width of the antenna assembly in the vertical plane, thereby improving the gain of the antenna assembly in the horizontal plane. The vertical plane is also called the vertical plane or the E plane, that is, the plane of φ = 90 degrees in FIG. 5, and the horizontal plane is also called the H plane, that is, the plane of θ = 90 degrees in FIG. 5.

[0146] In the embodiment of the present disclosure, compared with the single antenna radiating electromagnetic waves, the number of radiation units is increased by the first antenna and the second antenna radiating electromagnetic waves together. Then, in the application, by controlling the current transmitted on the first antenna and the second antenna to be in the same direction, the first antenna and the second antenna can radiate the same direction electromagnetic waves outward, and then the gain of the antenna assembly can be increased and / or the working frequency band of the antenna assembly can be widened, so as to ensure or improve the communication quality of the network equipment in a smaller size.

[0147] The embodiment also provides a network equipment, which comprises a radio frequency circuit and the antenna assembly described above, and the radio frequency circuit is used for making the antenna assembly transceive wireless signals. Wherein, the radio frequency circuit can be arranged on the mainboard 200 of the network equipment as shown in FIG. 1, wherein the base material of the mainboard 200 can be FR4, the relative dielectric constant thereof can be 4.4, the loss tangent can be 0.02, and the thickness can be 1.6 mm. The upper surface and the lower surface of the mainboard 200 are both covered with copper, wherein the thickness of the copper is 0.017 mm. Wherein, the embodiment does not make specific limitation to the mainboard of the network equipment.

[0148] The terms used in the embodiments of the present disclosure are used only to explain embodiments of the present disclosure and not to limit the present disclosure. Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure have the same meanings as are commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms do not limit the order or importance of the corresponding parts, but are used to distinguish one part from another. Also, the terms "one", "another", and similar terms mean "at least one" and do not limit the number of the corresponding parts. The terms "include" and "have" and their derivatives do not exclude the possibility of additional parts. The terms "upper", "lower", "left", "right", and similar terms are used to indicate relative positions, and the absolute positions of the described objects can be changed, so the relative positions can also be changed accordingly. "Multiple" means two or more, unless otherwise specified.

[0149] The above-described embodiments are merely possible implementations of the present disclosure, and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure should be included in the scope of the present disclosure.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes a dielectric substrate (1), a first antenna (2), a second antenna (3), a first ground plane (4), and a second ground plane (5); The first antenna (2) is located on the first surface of the dielectric substrate (1) and close to the first end of the dielectric substrate (1) along the length direction, and the first ground plane (4) is located on the second surface of the dielectric substrate (1) and close to the first end of the dielectric substrate (1) along the length direction. The second antenna (3) is located on the second surface of the dielectric substrate (1) and near the second end of the dielectric substrate (1) along the length direction, and the second ground plane (5) is located on the first surface of the dielectric substrate (1) and near the second end of the dielectric substrate (1) along the length direction.

2. The antenna assembly according to claim 1, characterized in that, Along the length of the dielectric substrate (1), all or part of the first antenna (2) is located between the first ground plane (4) and the first end of the dielectric substrate (1), and all or part of the second antenna (3) is located between the second ground plane (5) and the second end of the dielectric substrate (1).

3. The antenna assembly according to claim 1, characterized in that, The first antenna (2) and / or the second antenna (3) include a main radiating element and at least one auxiliary radiating element, wherein the at least one auxiliary radiating element is parallel to and connected to the main radiating element; The length of the line connecting each auxiliary radiation unit to the main radiation unit satisfies the condition that the auxiliary radiation unit and the main radiation unit radiate electromagnetic waves in the same direction.

4. The antenna assembly according to claim 3, characterized in that, The main radiating unit is strip-shaped, and its length direction is parallel to the length direction of the dielectric plate (1). The auxiliary radiating unit is L-shaped, with its horizontal portion connected to the main radiating unit and its vertical portion pointing towards the middle of the dielectric plate (1).

5. The antenna assembly according to claim 1, characterized in that, The projection of the second antenna (3) onto the first surface of the dielectric substrate (1) is symmetrically distributed with respect to the first antenna (2).

6. The antenna assembly according to claim 1, characterized in that, The antenna assembly further includes at least one dipole antenna, wherein both radiating elements of the dipole antenna are located on the surface of the dielectric substrate (1), and the length direction of the two radiating elements is parallel to the length direction of the dielectric substrate (1).

7. The antenna assembly according to claim 6, characterized in that, Of the two radiating elements of the dipole antenna, one radiating element is located on the first surface of the dielectric plate (1), and the other radiating element is located on the second surface of the dielectric plate (1).

8. The antenna assembly according to claim 6, characterized in that, The number of dipole antennas is multiple, and all of the multiple dipole antennas are arranged on the same side of the vertical center line along the length direction of the dielectric plate (1).

9. The antenna assembly according to any one of claims 1 to 8, characterized in that, The antenna assembly further includes a first feed line (7) and a second feed line (8), both of which include a signal line and a ground line; The signal line of the first feed line (7) is located on the first surface of the dielectric substrate (1) and is connected to the first antenna (2). The ground line of the first feed line (7) is located on the second surface of the dielectric substrate (1) and is connected to the first ground plane (4). The signal line of the second feed line (8) is located on the second surface of the dielectric substrate (1) and is connected to the second antenna (3). The ground line of the second feed line (8) is located on the first surface of the dielectric substrate (1) and is connected to the second ground plane (5).

10. The antenna assembly according to claim 9, characterized in that, The signal line of the first feeder (7) is arranged in parallel with the ground line, and the signal line of the second feeder (8) is arranged in parallel with the ground line.

11. The antenna assembly according to claim 9, characterized in that, The signal lines of the first feed line (7) and the ground lines of the second feed line (8) are symmetrically distributed on the first surface of the dielectric substrate (1), and the ground lines of the first feed line (7) and the signal lines of the second feed line (8) are symmetrically distributed on the second surface of the dielectric substrate (1).

12. The antenna assembly according to claim 9, characterized in that, The electrical length of the signal line of the first feed line (7) is equal to the electrical length of the signal line of the second feed line (8), and the first antenna (2) and the second antenna (3) radiate electromagnetic waves in the same direction.

13. The antenna assembly according to claim 9, characterized in that, The first feed line (7) and the second feed line (8) are both arranged on the same side of the vertical center line along the length direction of the dielectric plate (1).

14. A network device, characterized in that, The network device includes a radio frequency circuit and an antenna assembly as described in any one of claims 1 to 13, wherein the radio frequency circuit is used to enable the antenna assembly to transmit and receive wireless signals.

Images