CN203589203U - Double-frequency single-feed antenna and double-frequency MiMo (Multiple Input Multiple Output) antenna - Google Patents

Abstract

The utility model is suitable for antenna technology, and provides a dual-frequency single-feed antenna, which is arranged on a dielectric substrate, and the dielectric substrate is vertically placed on a metal bottom plate, including: a "T" shaped vibrator, which is arranged on the first surface, the longitudinal end of the vibrator is close to the first side of the dielectric substrate for power feeding; the resonant rod arranged on the first surface, the resonant rod includes a first resonant rod and a second resonant rod, the first The resonant rod and the second resonant rod are respectively arranged on the lateral sides of the vibrator and are symmetrical to the longitudinal axis of the vibrator; an "m"-shaped grounding part, one end of the grounding part in the longitudinal direction is connected to the second part of the dielectric substrate side contact. Through the end of the vibrator close to the metal base plate, it can feed the resonant rod working in the frequency band and the second frequency band. The dual-frequency single-feed antenna is arranged on the same dielectric substrate, which has a simple structure and improves production efficiency. wireless coverage performance. In addition, a dual-band MiMo antenna is also available.

Description

Dual-band single-feed antenna and dual-band MiMo antenna

technical field

The utility model belongs to the field of antennas, in particular to a dual-frequency single-feed antenna and a dual-frequency MiMo antenna. the

Background technique

With the progress of the times, people's demand for wireless Internet access is increasing, and there are more and more requirements. Such as high-speed WIFI (wireless local area network) Internet access in offices, business hotels and other places, which requires excellent ceiling antennas to provide excellent signal coverage in order to provide users with high-speed, high-quality Internet experience. In the current market, there are more and more terminals supporting 5.8GHz, and 2.4GHz/5.8GHz dual-band WIFI has become the mainstream. the

In addition, MiMo (Multiple Input Multiple Output) ceiling antennas on the market are all designed with metal radiators and metal backplanes, that is, using the antenna design principle of a monopole and a grounded backplane. Usually, three 2.4GHz monopole antennas and three 5.8GHz monopole antennas are divided into upper and lower layers inside the antenna. The upper layer layout is three co-polarized 5.8GHz monopole antennas and metal The isolation board is used to increase the isolation between antennas, and the lower layer is laid out in the same way as the upper layer, which are three co-polarized 2.4GHz monopole antennas. The feature of this layout is that a single antenna pattern on the same layer only covers 120 degrees, while three antenna patterns are superimposed to form a 360-degree antenna to achieve an omnidirectional antenna. The advantage is that the maximum gain of a single antenna can be increased to improve the coverage of the signal; the disadvantage is that the three antennas are of the same polarization and the distance is too close, so the metal isolation plate must be added to make the structure complicated, and the metal isolation plate has a greater impact on the radiation energy of the antenna. Absorption makes antenna efficiency more difficult. the

From the perspective of MiMo technology, this design conflicts with MiMo's concept of using multiple antennas to simultaneously send and receive transmission signals to improve wireless transmission speed, because the receiving client can only receive signals from one of the antennas with the same frequency in one direction; and In addition, the signals of the two antennas are difficult to receive due to the influence of the same polarization on the pattern and the blocking of the metal isolation plate; at the same time, in terms of structural design, the 2.4GHz and 5.8GHz feeders of the dual-band MiMo antennas on the market are separated , increasing the difficulty of processing and designing the antenna, making it difficult to produce in batches. the

Therefore, the current dual-band ceiling antennas are all in the form of dual-frequency dual-feed, which brings great inconvenience in production and indoor wireless coverage layout. the

Utility model content

The purpose of the embodiments of the present invention is to provide a single-feed dual-frequency single-feed antenna, aiming at solving the problems of the traditional double-feed dual-frequency single-feed antenna with complex structure, low production efficiency, and poor wireless coverage performance. the

The utility model provides a dual-frequency single-feed antenna, which is arranged on a dielectric substrate, and the dielectric substrate is vertically placed on a metal base plate, and the dielectric substrate includes a first surface and a second surface opposite to the first surface, so The dual-frequency single-feed antenna includes:

The vibrator is in a "T" shape and is arranged on the first surface. One longitudinal end of the vibrator is close to the first side of the dielectric substrate for feeding power, and the first side of the dielectric substrate is fixed to the metal floor;

The resonant rod is arranged on the first surface, the resonant rod includes a first resonant rod and a second resonant rod, and the first resonant rod and the second resonant rod are respectively arranged on lateral sides of the vibrator and opposite to the vibrator The longitudinal axis of the symmetry;

The ground portion is in the shape of an "m" and is disposed on the second surface, and one longitudinal end of the ground portion is in contact with the first side of the dielectric substrate. the

Further, the vibrator includes a first radiating part and a second radiating part, the first radiating part and the second radiating part are rectangular and coaxially coupled in the longitudinal direction, and the lateral width of the first radiating part is larger than that of the second radiating part. The lateral width of the radiating portion, the end of the second radiating portion not coupled to the first radiating portion is close to the first side of the dielectric substrate. the

Further, the longitudinal length of the first radiating part is equal to the longitudinal length of the second radiating part, and the value of the longitudinal length of the vibrator corresponds to a half wavelength of the first frequency. the

Further, the first resonant rod and the second resonant rod are bar-shaped and arranged parallel to the longitudinal axis of the vibrator, and the midpoint of the line connecting the midpoints of the first resonant rod and the second resonant rod is close to the The geometric center of the vibrator. the

Further, the lateral distance between the first resonant rod and the second resonant rod and the first radiating part is 1-3 mm, and the lateral distance between the first resonant rod and the second resonant rod and the second radiating part The distance is 5-7 mm. the

Further, the longitudinal lengths of the first resonant rod and the second resonant rod are equal and correspond to a quarter wavelength of the second frequency. the

Further, the longitudinal axis of the ground portion is on the same plane as the longitudinal axis of the vibrator. the

Further, the side of the ground portion opposite to the first side of the dielectric substrate is the first side, the side where the first radiating part and the second radiating part are coupled is the second side, and the first A projection of the sideline perpendicular to the first surface coincides with the second sideline. the

Further, the grounding portion includes a rectangular connecting portion, a first right-angle bend arm and a second right-angle bend arm;

Both the first right-angled arm and the second right-angled arm include a first side and a second side perpendicular to each other, one end of the connecting portion is in contact with the first side of the dielectric substrate, and the connecting portion The other end is respectively coupled with the first side of the first right-angled arm and the first side of the second right-angled arm, the second side of the first right-angled arm, the second right-angled arm The second side of the second side is symmetrical with respect to the connection part and parallel to each other. the

Further, the expanded lengths of the first right-angled arm and the second right-angled arm are equal, and correspond to a quarter wavelength of the first frequency band. the

The above-mentioned dual-frequency single-feed antenna can feed power to the resonant rod working in the frequency band and the second frequency band through the end of the vibrator close to the metal base plate. The dual-frequency single-feed antenna is arranged on the same dielectric substrate and has a simple structure. Production brings convenience, improves production efficiency, and improves wireless coverage performance at the same time. the

In addition, a dual-frequency MiMo antenna is also provided, which includes a metal base plate and a dielectric substrate standing on the metal base plate, the above-mentioned dual-frequency single-feed antenna is provided on the dielectric substrate, and the block, a plurality of dielectric substrates provided with the dual-frequency single-feed antenna are vertically arranged on the metal base plate, the edges connecting the plurality of the dielectric substrates and the metal base plate are connecting edges, and all the connecting edges The intersection points of the extension lines are at the same point, and the included angles of the extension lines of adjacent connecting sides are equal. the

The above-mentioned dual-frequency MiMo antenna surrounds the base plate with the base plate provided with the above-mentioned dual-frequency single-feed antenna uniformly and circularly, and does not need another base plate as the interval between the antennas of the same polarization, and also reduces the radiation of the base plate to the antenna. The impact of energy improves the performance of the MiMo antenna. In addition, the end of the vibrator close to the metal base plate can feed the vibrator working at the first frequency and the resonant rod working at the second frequency. The dual-frequency single-feed antenna is laid On the same dielectric substrate, the structure is simple, which brings convenience to production and improves production efficiency. the

Description of drawings

Fig. 1 is the schematic diagram of the first surface structure of the dual-frequency single-feed antenna provided by the embodiment of the utility model;

Fig. 2 is the schematic diagram of the second surface structure of the dual-frequency single-feed antenna provided by the embodiment of the utility model;

Fig. 3 is the 2.4GHz VSWR simulation diagram of the dual-frequency single-feed antenna provided by the embodiment of the utility model;

Fig. 4 is the 2.45GHz pattern of the dual-frequency single-feed antenna that the utility model embodiment provides;

Fig. 5 is the 5.8GHz VSWR simulation diagram of the dual-frequency single-feed antenna provided by the embodiment of the present invention;

Fig. 6 is the 5.8GHz pattern of the dual-frequency single-feed antenna that the utility model embodiment provides;

Fig. 7 is the structural representation of the dual-band MiMo antenna that the utility model embodiment provides;

Fig. 8 is the 2.4GHz VSWR simulation diagram of the dual-band MiMo antenna provided by the embodiment of the present invention;

Fig. 9 is the 5.8GHz VSWR simulation diagram of the dual-frequency MiMo antenna provided by the embodiment of the utility model;

Fig. 10 is the dual frequency MiMo antenna 2.45GHz pattern that the utility model embodiment provides;

Fig. 11 is a 5.8 GHz pattern of the dual-band MiMo antenna provided by the embodiment of the present invention. the

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the belt embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

Fig. 1 and Fig. 2 respectively show a schematic diagram of the first surface structure and a schematic diagram of the second surface of a dielectric substrate provided with a dual-frequency single-feed antenna provided by a preferred embodiment. Hereinafter, specific embodiments will be described by taking the frequency of the first frequency band of the dual-frequency single-feed antenna as 2.4 GHz-2.5 GHz and the frequency of the second frequency band as 5.725 GHz-5.85 GHz as an example. the

The dual-frequency single-feed antenna is disposed on a dielectric substrate 10, and the dielectric substrate 10 stands on a metal base plate 20. The dielectric substrate 10 includes a first surface and a second surface opposite to the first surface. The dual-frequency single-feed antenna includes a vibrator 110 , a resonant rod 120 , and a grounding part 130 . the

Referring to FIG. 1, the vibrator 110 is in the shape of a "T" and is arranged on the first surface of the dielectric substrate 10. One longitudinal end of the vibrator 110 is close to the first side 12 of the dielectric substrate 10 for feeding power, and the first side of the dielectric substrate 10 12 is fixed on the metal base plate 20, and the longitudinal end of the vibrator 110, that is, the bottom of the vibrator 110 shown in FIG. More specifically, the dielectric substrate 10 provided with the dual-frequency single-feed antenna is erected behind the metal base plate 20 , and the “T”-shaped bottom end of the vibrator 110 is opposite to the metal base plate 20 and separated by a gap. In line with the design and principle of the antenna, the feeding point of the antenna is separated from the ground, the impedance matching of the antenna can be adjusted, the standing wave of the antenna is better, and the radiation performance of the antenna is improved. the

Further, in one embodiment, the vibrator 110 includes a first radiating portion 112 and a second radiating portion 114, the first radiating portion 112 and the second radiating portion 114 are rectangular and coaxially coupled longitudinally, the first radiating portion 112 The lateral width of is greater than the lateral width of the second radiation portion 114 . The end of the second radiating portion 114 not coupled to the first radiating portion 112 is used as the above-mentioned feeding point, that is, the end of the second radiating portion 114 away from the first radiating portion 112 is close to the first side 12 of the dielectric substrate 10 . The second radiating part 114 feeds power to the first radiating part 112 to realize the directional radiation design of the antenna at the first radiation frequency and improve the radiation performance of the antenna at the first radiation frequency. the

Further, the longitudinal length of the first radiating part 112 is equal to the longitudinal length of the second radiating part 114, the value of the longitudinal length of the vibrator 110 corresponds to half the wavelength of the first frequency, and the vibrator 110 is a monopole. the

The vibrator 110 serves as a radiation antenna body of the first frequency, and can provide wireless signals in the range of 2.4GHz-2.5GHz. FIG. 3 shows that the vibrator 110 can form a good match with the external circuit, and the energy of the external circuit can be transmitted to the antenna most effectively. Figure 4 shows the energy pattern radiated by the antenna of the present invention to the surrounding space. Due to the influence of the environment, the directivity of the antenna will be affected to a certain extent, but overall it is relatively omnidirectional. the

Referring to FIG. 1 , the resonant rod 120 is arranged on the first surface, the resonant rod 120 includes a first resonant rod 122 and a second resonant rod 124, and the first resonant rod 122 and the second resonant rod 124 are respectively arranged on lateral sides of the vibrator 110 and It is symmetrical with respect to the longitudinal axis of the vibrator 110 . Further, the first resonant rod 122 and the second resonant rod 124 are strip-shaped and arranged parallel to the longitudinal axis of the vibrator 110, and the midpoint of the line connecting the midpoints of the first resonant rod 122 and the second resonant rod 124 is close to the vibrator 110 Preferably, the midpoint of the line connecting the midpoints of the first resonant rod 122 and the second resonant rod 124 coincides with the geometric center of the vibrator 110 . The first resonant rod 122 and the second resonant rod 124 make the radiation directivity of the resonant frequency of the two resonant rods consistent. the

Specifically, the lateral distance between the first resonant rod 122 and the second resonant rod 124 and the first radiating part 112 is 1-3 mm, preferably 2 mm; The lateral distance of 114 is 5-7 mm, preferably 4 mm. The purpose of impedance matching can be achieved, the return loss of the antenna is smaller, and the radiation performance of the antenna is improved. the

More specifically, the longitudinal lengths of the first resonant rod 122 and the second resonant rod 124 are equal and correspond to a quarter wavelength of the second frequency. The resonant rod 120 serves as a radiation antenna body of the second frequency, and can provide wireless signals in the range of 5.725GHz-5.85GHz. FIG. 5 shows that the vibrator 110 can form a good match with the external circuit, and the energy of the external circuit can be transmitted to the antenna most effectively. Figure 6 shows the energy pattern radiated by the antenna of the present invention to the surrounding space. Due to environmental influences, the directivity of the antenna will be affected to a certain extent, but overall it is relatively omnidirectional. the

Referring to FIG. 2 , the grounding portion 130 is in the shape of an “m”, and the grounding portion 130 is arranged on the second surface of the dielectric substrate 10. One longitudinal end of the grounding portion 130 is in contact with the first side 12 of the dielectric substrate 10. In this embodiment, that is, as shown in FIG. The bottom of the "m"-shaped grounding part 130 shown in 2 is one longitudinal end, which can make the grounding part 130 and the metal base plate 20 realize electrical connection. In one embodiment, the longitudinal axis of the ground portion 130 is on the same plane as the longitudinal axis of the vibrator 110 , especially, the plane is perpendicular to the dielectric substrate 10 . the

Further, the side of the ground portion 130 opposite to the first side 12 of the dielectric substrate 10 is the first side, and the side where the first radiating portion 112 and the second radiating portion 114 are coupled is the second side, and the first side is at The projection perpendicular to the first surface coincides with the second edge. In this embodiment, that is, the side of the "m"-shaped grounding portion 130 shown in FIG. 2 that is away from the metal base plate 20 and the side of the first radiation portion 112 shown in FIG. 1 that is close to the metal base plate 20 are on the same plane, so that the impedance Better matching improves the radiation performance of the antenna. the

Furthermore, the grounding portion 130 includes a rectangular connecting portion 131 , a first right-angle bent arm 132 and a second right-angle bent arm 133 . Specifically, the expanded lengths of the first right-angle bent arm 132 and the second right-angle bent arm 133 are equal and correspond to a quarter wavelength of the first frequency band. the

The first right-angled arm 132 and the second right-angled arm 133 both include a first side and a second side perpendicular to each other, and one end of the connecting part 131 is in contact with the first side 12 of the dielectric substrate 10, that is, as shown in FIG. The bottom of the "m"-shaped grounding part 130 can be electrically connected to the metal substrate; the other end of the connecting part 131 is respectively coupled to the first side of the first right-angled arm 132 and the first side of the second right-angled arm 133. In the embodiment, the second side of the first right-angled arm 132 and the second side of the second right-angled arm 133 are symmetrical and parallel to the connecting part 131, and the return loss is smaller, so that the impedance is matched better and the antenna is improved. radiation performance. the

The above-mentioned dual-frequency single-feed antenna can feed the resonant rod 120 working in the frequency band and the second frequency band through the end of the vibrator 110 close to the metal base plate 30. The dual-frequency single-feed antenna is arranged on the same dielectric substrate 10, The structure is simple, which brings convenience to production, improves production efficiency, and improves wireless coverage performance at the same time. the

As shown in Figure 7, it is a dual-frequency MiMo antenna in an embodiment. The dual-frequency MiMo antenna provided by the utility model includes a metal base plate 30 and a dielectric substrate 10 standing on the metal base plate 30. The dielectric substrate 10 is provided with the above-mentioned Dual-frequency single-feed antenna, at least two dielectric substrates 10, a plurality of dielectric substrates 10 provided with dual-frequency single-feed antennas are vertically arranged on the metal base 30, more specifically, the dielectric substrate 10 is surrounded by the metal base 30 in a circular shape , the side connecting multiple dielectric substrates 10 and the metal base plate 30 is the connecting side, the intersection point of the extension lines of all the connecting sides is at the same point, that is, the center O of the circle, and the angle between the extension lines of the adjacent connecting sides is The angles are equal. the

As shown in FIG. 7 , three dielectric substrates 10 are arranged on the metal base plate 30 , and the included angles of the extension lines of the connecting sides of the three dielectric substrates 10 are all 120 degrees. the

Figure 8 and Figure 9 respectively show that the dual-band MiMo antenna can form a good match with the external circuit, and the energy of the external circuit can be transmitted to the antenna most effectively. Figure 10 and Figure 11 show the energy pattern radiated by the dual-band MiMo antenna of the present invention to the surrounding space. Due to the influence of the environment, the directivity of the antenna will be affected to a certain extent, but the overall direction is relatively omnidirectional. the

The above-mentioned dual-frequency MiMo antenna surrounds the base plate with the base plate provided with the above-mentioned dual-frequency single-feed antenna uniformly and circularly, and does not need another base plate as the interval between the antennas of the same polarization, and also reduces the radiation of the base plate to the antenna. The impact of energy improves the performance of the MiMo antenna. In addition, the end of the vibrator 110 close to the metal base plate 30 can feed the vibrator 110 working at the first frequency and the resonant rod 120 working at the second frequency. The dual-frequency single The feeder antenna is arranged on the same dielectric substrate 10, and has a simple structure, which brings convenience to production and improves production efficiency. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (11)

1. A dual-frequency single-feed antenna is arranged on a dielectric substrate, and the dielectric substrate is erected on a metal base plate, and the dielectric substrate includes a first surface and a second surface opposite to the first surface, characterized in that , the dual-frequency single-feed antenna includes: The vibrator is in a "T" shape and is arranged on the first surface. One longitudinal end of the vibrator is close to the first side of the dielectric substrate for feeding power, and the first side of the dielectric substrate is fixed to the metal floor; The resonant rod is arranged on the first surface, the resonant rod includes a first resonant rod and a second resonant rod, and the first resonant rod and the second resonant rod are respectively arranged on lateral sides of the vibrator and opposite to the vibrator The longitudinal axis of the symmetry; The ground portion is in the shape of an "m" and is disposed on the second surface, and one longitudinal end of the ground portion is in contact with the first side of the dielectric substrate. the 2. The dual-frequency single-feed antenna according to claim 1, wherein the vibrator includes a first radiating portion and a second radiating portion, and the first radiating portion and the second radiating portion are rectangular and longitudinally coaxial Coupled with each other, the lateral width of the first radiating portion is greater than the lateral width of the second radiating portion, and an end of the second radiating portion not coupled to the first radiating portion is close to the first side of the dielectric substrate. the 3. The dual-frequency single-feed antenna according to claim 2, wherein the longitudinal length of the first radiating part is equal to the longitudinal length of the second radiating part, and the longitudinal length value of the vibrator corresponds to the first half the wavelength of the frequency. the 4. The dual-frequency single-feed antenna according to claim 1, 2 or 3, wherein the first resonant rod and the second resonant rod are strip-shaped and arranged parallel to the longitudinal axis of the vibrator, so The midpoint of the line connecting the midpoints of the first resonant rod and the second resonant rod is close to the geometric center of the vibrator. the 5. The dual-frequency single-feed antenna according to claim 2 or 3, wherein the lateral distance between the first resonant rod and the second resonant rod and the first radiating part is 1 to 3 millimeters, and the The lateral distance between the first resonant rod and the second resonant rod and the second radiating part is 5-7 millimeters. the 6. The dual-frequency single-fed antenna according to claim 1 or 2, wherein the longitudinal lengths of the first resonant rod and the second resonant rod are equal and correspond to a quarter wavelength of the second frequency. the 7 . The dual-frequency single-feed antenna according to claim 1 , wherein the longitudinal axis of the ground part is on the same plane as the longitudinal axis of the vibrator. the 8. The dual-frequency single-feed antenna according to claim 2, wherein the side of the ground portion opposite to the first side of the dielectric substrate is a first side line, and the first radiating part and the second side The side to which the radiating part is coupled is the second side, and the projection of the first side perpendicular to the first surface coincides with the second side. the 9. The dual-frequency single-feed antenna as claimed in claim 1, 7 or 8, wherein the grounding portion includes a rectangular connecting portion, a first right-angle bent arm and a second right-angle bent arm; Both the first right-angled arm and the second right-angled arm include a first side and a second side perpendicular to each other, one end of the connecting portion is in contact with the first side of the dielectric substrate, and the connecting portion The other end is respectively coupled with the first side of the first right-angled arm and the first side of the second right-angled arm, the second side of the first right-angled arm, the second right-angled arm The second side of the second side is symmetrical with respect to the connection part and parallel to each other. the 10 . The dual-frequency single-feed antenna according to claim 9 , wherein the expanded lengths of the first right-angle curved arm and the second right-angle curved arm are equal and correspond to a quarter wavelength of the first frequency band. 11 . the 11. A dual-frequency MiMo antenna, comprising a metal base plate and a dielectric substrate standing on the metal base plate, characterized in that the dual-frequency single-feed antenna according to any one of claims 1 to 10 is provided on the dielectric substrate An antenna, the dielectric substrate is at least two, a plurality of dielectric substrates provided with the dual-frequency single-feed antenna are vertically arranged on the metal base plate, and the edges connecting the plurality of the dielectric substrates and the metal base plate are connected The intersection points of the extension lines of all the connecting sides are at the same point, and the included angles of the extension lines of adjacent connecting sides are equal. the

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