CN113178696A - Antenna and antenna equipment - Google Patents
Antenna and antenna equipment Download PDFInfo
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- CN113178696A CN113178696A CN202110341060.XA CN202110341060A CN113178696A CN 113178696 A CN113178696 A CN 113178696A CN 202110341060 A CN202110341060 A CN 202110341060A CN 113178696 A CN113178696 A CN 113178696A
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- 230000005404 monopole Effects 0.000 claims abstract description 95
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 230000007547 defect Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 19
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
Abstract
The invention discloses an antenna and antenna equipment, wherein the antenna comprises a dielectric substrate, a first monopole antenna, a second monopole antenna and a reconfigurable switch; the front side and the back side of the medium substrate are both grounded; the first monopole antenna and the second monopole antenna are both arranged on the front surface of the dielectric substrate; the ground plane of the dielectric substrate is also provided with a defect ground structure, and the reconfigurable switch is arranged in the defect ground structure; the defected ground structure comprises a first group of grooves and a second group of grooves, wherein the first group of grooves is close to the first monopole antenna, and the second group of grooves is close to the second monopole antenna. The invention can realize the switching of the antenna radiation on the horizontal plane and the inclination angle and meet the wireless coverage of a multi-storey building. In an actual application scene, when the positions of the left antenna and the right antenna are not symmetrically distributed any more, the adjustment of the radiation direction of the antenna can be realized by adjusting the shape of the copper sheet and the position of the slot line, and the omni-directionality of the antenna is ensured.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to an antenna and an antenna apparatus.
Background
With the construction of intelligent cities, the implementation of Internet of things engineering and the continuous updating and upgrading of mobile communication terminals, the wireless communication technology is rapidly developed. In a wireless communication system, an antenna is one of essential key components. In order to satisfy wireless communication coverage of a multi-storey large-dwelling building, same-storey coverage and cross-storey coverage need to be considered. However, the maximum radiation direction of the antennas on the market is in the horizontal plane, so that the antennas only have good same-layer coverage capability, and the cross-layer coverage capability is weak.
Although the directional diagram can be reconstructed by changing the structure of the parasitic unit, the antenna directional diagram can only be changed on the horizontal plane, and the switching of the directional diagram on the horizontal plane and the up-down inclination angle cannot be realized, so that the coverage of wireless signals on the horizontal plane and the up-down inclination angle cannot be met.
Disclosure of Invention
The invention aims to provide an antenna and antenna equipment, wherein a defected ground structure is arranged on a ground plate, and a reconfigurable switch is added to realize on-off, so that a directional diagram of the antenna can be switched between a horizontal plane and an inclined angle, and the wireless communication coverage of a multi-story building is met.
In order to achieve the above object, an embodiment of the present invention provides an antenna, including a dielectric substrate, a first monopole antenna, a second monopole antenna, and a reconfigurable switch; the front side and the back side of the medium substrate are both grounded; the first monopole antenna and the second monopole antenna are both arranged on the front surface of the dielectric substrate; the ground plane of the dielectric substrate is also provided with a defect ground structure, and the reconfigurable switch is arranged in the defect ground structure; the defected ground structure comprises a first group of grooves and a second group of grooves, wherein the first group of grooves is close to the first monopole antenna, and the second group of grooves is close to the second monopole antenna.
Preferably, the front surface of the dielectric substrate is divided into two sides, the first monopole antenna is located on one side, and the second monopole antenna is located on the other side.
Preferably, the first monopole antenna and the second monopole antenna each include a first branch, a second branch, and a third branch; the first branch node is provided with a feed point, and the first branch node further comprises a first rectangular block, a trapezoidal block and a second rectangular block which are sequentially connected from the feed point to the extending direction of the first branch node and have gradually increased widths; the second branch knot and the third branch knot are rectangular blocks, the short side of the second branch knot is connected with the short side of the second rectangular block, the second branch knot is connected with the second rectangular block on the same straight line, the third branch knot is connected with the long side of the second branch knot perpendicularly, and the third branch knot is connected with the feed point on the same side.
Preferably, the first group of grooves includes a first groove and a second groove, the first groove is close to the feeding point of the first monopole antenna, the second groove is close to the second stub of the first monopole antenna, and the second groove has a section of groove parallel to the third stub of the first monopole antenna;
the second group of grooves comprises a third groove and a fourth groove, the third groove is close to the feed point of the second monopole antenna, the fourth groove is close to the second branch of the second monopole antenna, and the fourth groove is provided with a section of groove which is parallel to the third branch of the second monopole antenna.
Preferably, the reconfigurable switches include a first reconfigurable switch, a second reconfigurable switch, a third reconfigurable switch and a fourth reconfigurable switch, the first reconfigurable switch is disposed in the first trench, the second reconfigurable switch is disposed in the second trench, the third reconfigurable switch is disposed in the third trench, and the fourth reconfigurable switch is disposed in the fourth trench.
Preferably, one end of each of the first trench, the second trench, the third trench and the fourth trench is communicated with the edge of the dielectric substrate.
Preferably, the reconfigurable switch is of the type comprising a radio frequency switch, a PIN diode or a variable capacitance.
Preferably, when the reconfigurable switch is a radio frequency switch, the reconfigurable switch includes six pins, two of the six pins are used for connecting to a CPU and receiving a control signal of the CPU to control a working state of the radio frequency switch, and one pin is connected to one side of the trench and serves as a signal input end; one pin is connected with the other side of the groove and used as a signal output end; one pin is suspended; one pin is grounded.
Preferably, the grooves are all L-shaped grooves.
Another embodiment of the invention provides an antenna arrangement comprising an antenna as claimed in any of the preceding claims.
Compared with the prior art, the antenna and the antenna equipment provided by the embodiment of the invention have the advantages that the defected ground structure is arranged on the ground plate, the four L-shaped grooves are added, and the reconfigurable switch is added in the grooves to realize on-off, so that the directional diagram of the antenna can realize three radiation modes of upward inclination, horizontal inclination and downward inclination, the antenna radiation can be switched between the horizontal plane and the vertical plane, signals of an upper floor and a lower floor are taken into consideration, and the application requirements of wireless communication coverage of a multi-storey building are met. The antenna is a monopole dual-frequency antenna, and the dual-frequency antenna function is realized by utilizing one antenna structure, so that the antenna is small in size and easy to miniaturize; meanwhile, the antenna is low in cost, does not have high-cost devices, and is easy to apply to household products.
Drawings
Fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a monopole antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating changes of radiation patterns of an antenna before and after being slotted according to an embodiment of the present invention;
fig. 4 is a radiation pattern of a vertical section of an antenna corresponding to the first reconfigurable switch, the third reconfigurable switch, and the four reconfigurable switches, respectively, when the first reconfigurable switch and the third reconfigurable switch are turned on and when the four reconfigurable switches are turned off, according to an embodiment of the present invention;
fig. 5 is a radiation pattern of a vertical section of an antenna corresponding to the second reconfigurable switch, the fourth reconfigurable switch, and the four reconfigurable switches, respectively, when the second reconfigurable switch and the fourth reconfigurable switch are turned on and when the four reconfigurable switches are turned off, according to an embodiment of the present invention;
fig. 6 is a radiation pattern of a vertical section corresponding to the antenna according to an embodiment of the present invention when four reconfigurable switches are turned on and when four reconfigurable switches are turned off;
fig. 7 is a schematic circuit diagram of an rf switch according to an embodiment of the present invention;
fig. 8 is a simplified block diagram of a switch pin of an rf switch according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of an antenna provided in this embodiment of the present invention, the antenna includes a dielectric substrate 5, a first monopole antenna 1, a second monopole antenna 2, and a reconfigurable switch; wherein, the front and back sides of the dielectric substrate 5 are grounded; the first monopole antenna 1 and the second monopole antenna 2 are both arranged on the front surface of the dielectric substrate 5; the ground plane of the dielectric substrate 5 is also provided with a defect ground structure, and the reconfigurable switch is arranged in the defect ground structure; the defected ground structure comprises a first group of grooves and a second group of grooves, wherein the first group of grooves is close to the first monopole antenna 1, and the second group of grooves is close to the second monopole antenna 2.
Specifically, the antenna comprises a dielectric substrate 5, a first monopole antenna 1, a second monopole antenna 2 and a reconfigurable switch; wherein, the front and back sides of the medium substrate 5 are both grounded, and the front and back sides are both coated with copper. The first monopole antenna 1 and the second monopole antenna 2 are both arranged on the front surface of the dielectric substrate 5. As shown in fig. 1, a dielectric substrate 5 is formed by leaving a space on each of the left and right sides of the front surface thereof without a copper sheet for placing the first monopole antenna 1 and the second monopole antenna 2. The Ground plane of the dielectric substrate 5 is further provided with a Defected Ground Structure (DGS), the reconfigurable switch is arranged in the Defected Ground structure, and when the reconfigurable switch is arranged in a certain groove, connection or disconnection of two sides of the groove can be realized through connection and disconnection of the reconfigurable switch, so that an antenna radiation pattern is changed. The defected ground structure comprises a first set of grooves close to the first monopole antenna 1 and a second set of grooves close to the second monopole antenna 2. The first group of grooves is combined with the reconfigurable switch in the first group of grooves and is used for controlling the inclination angle of a directional diagram of the first monopole antenna 1; the second set of grooves and the reconfigurable switches in the second set of grooves combine to control the tilt of the pattern of the second monopole antenna 2. The invention can also realize the controllability of the integral directional diagram of the antenna by adjusting the position of the groove and the opening and closing of different reconfigurable switches, thereby meeting different communication requirements.
According to the antenna provided by the embodiment of the invention, the defected ground structure is added in the dielectric substrate 5, and the reconfigurable switch is added to realize on-off, so that the directional diagram of the antenna can be switched between a horizontal plane and an upper and lower inclined angle, and the wireless communication coverage of a multi-story building is met.
As an improvement of the above scheme, the front surface of the dielectric substrate 5 is divided into two sides, the first monopole antenna 1 is located on one side, and the second monopole antenna 2 is located on the other side.
Specifically, the front surface of the dielectric substrate 5 is divided into two sides, the first monopole antenna 1 is located on one side, and the second monopole antenna 2 is located on the other side. As shown in fig. 1, the first monopole antenna 1 is located on the left side of the front surface, and the second monopole antenna 2 is located on the right side of the front surface.
The positions of the first monopole antenna 1 and the second monopole antenna 2 may be left-right symmetrical or asymmetrical, depending on the actual usage scenario. When the first monopole antenna 1 and the second monopole antenna 2 are arranged to be symmetrical left and right, the central line is a bisector of a connecting line between the feeding point of the first monopole antenna 1 and the feeding point of the second monopole antenna 2. In an actual application scene, when the positions of the left antenna and the right antenna are not symmetrically distributed any more, the adjustment of the radiation direction of the antennas can be realized by adjusting the shape of the copper sheet and the position of the slot line.
As an improvement of the above scheme, the first monopole antenna 1 and the second monopole antenna 2 each include a first branch, a second branch, and a third branch; the first branch node is provided with a feed point, and the first branch node further comprises a first rectangular block, a trapezoidal block and a second rectangular block which are sequentially connected from the feed point to the extending direction of the first branch node and have gradually increased widths; the second branch knot and the third branch knot are rectangles, the short side of the second branch knot is connected with the short side of the second rectangular block, the second branch knot is connected with the second rectangular block on the same straight line, the third branch knot is connected with the long side of the second branch knot perpendicularly, and the third branch knot is connected with the feed point on the same side.
Specifically, referring to fig. 2, which is a schematic structural diagram of a monopole antenna according to the embodiment of the present invention, as can be seen from fig. 2, each of the first monopole antenna 1 and the second monopole antenna 2 includes a first branch, a second branch, and a third branch; the first branch node is provided with a feed point, and also comprises a first rectangular block, a trapezoidal block and a second rectangular block which are sequentially connected from the feed point to the extending direction of the first branch node and have gradually increased widths; the second branch knot and the third branch knot are both rectangles, the short side of the second branch knot is connected with the short side of the second rectangular block, the second branch knot and the second rectangular block are on the same straight line, the third branch knot is vertically connected with the long side of the second branch knot, and the third branch knot and the feed point are on the same side. The other long edge of the second branch section is aligned with the long edge of the second rectangular block far away from the trapezoidal block.
In addition, as shown in fig. 2, the left side is a monopole antenna used in the present invention, which is equivalent to two antenna elements on the right side, the first antenna element on the right side is used to form 2.4GHz resonance, and the second antenna element on the right side is used to form 5GHz resonance. Therefore, the monopole antenna is a dual-frequency antenna, namely, the dual-frequency antenna function is realized through one antenna structure, and compared with a single-frequency antenna, the number of the antennas is reduced by half, so that the layout space is saved to a certain extent, and the miniaturization effect is realized.
As a modification of the above scheme, the first group of grooves includes a first groove 41 and a second groove 42, the first groove 41 is close to the feeding point of the first monopole antenna 1, the second groove 42 is close to the second branch of the first monopole antenna 1, and the second groove 42 has a section of groove parallel to the third branch of the first monopole antenna 1;
the second group of grooves includes a third groove 43 and a fourth groove 44, the third groove 43 is close to the feeding point of the second monopole antenna 2, the fourth groove 44 is close to the second stub of the second monopole antenna 2, and the fourth groove 44 has a section of groove parallel to the third stub of the second monopole antenna 2.
It should be noted that, a slot is formed on the ground near the antenna to form a dgs (defected ground structure) structure, so that the surface current distribution of the ground near the antenna can be changed, the electric field distribution is further changed, and the radiation direction of the antenna is finally influenced. Fig. 3 is a schematic diagram of changes of radiation patterns of the antenna before and after the antenna is slotted according to the embodiment of the present invention. As can be seen from FIG. 3, in the 2.4G frequency band, the addition of DGS makes the radiation direction of the antenna more toward the horizontal plane; in the 5G frequency band, the side lobe of the antenna is reduced, and the main lobe gain is improved. Overall, the antenna gain in the horizontal plane in both frequency bands is significantly improved.
Specifically, the first group of grooves includes a first groove 41 and a second groove 42, the first groove 41 is close to the feeding point of the first monopole antenna 1, the second groove 42 is close to the second stub of the first monopole antenna 1, and the second groove 42 has a section of groove parallel to the third stub of the first monopole antenna 1, and the second groove 42 is also close to the third stub. Preferably, as shown in fig. 1, the dielectric substrate 5 is rectangular, the first monopole antenna 1 is printed at the upper left corner of the dielectric substrate 5, the first groove 41 is located at the right side of the first monopole antenna 1 in the horizontal direction, and the second groove 42 is located below the first monopole antenna 1 in the vertical direction.
The second group of grooves comprises a third groove 43 and a fourth groove 44, the third groove 43 is close to the feed point of the second monopole antenna 2, the fourth groove 44 is close to the second stub of the second monopole antenna 2, the fourth groove 44 has a section of groove parallel to the third stub of the second monopole antenna 2, and the fourth groove 44 is also close to the third stub of the second monopole antenna 2. Preferably, as shown in fig. 1, the dielectric substrate 5 is rectangular, the second monopole antenna 2 is printed at the upper right corner of the dielectric substrate 5, the third groove 43 is located at the left side of the second monopole antenna 2 in the horizontal direction, and the fourth groove 44 is located below the second monopole antenna 2 in the vertical direction.
As a modification of the above, the reconfigurable switches include a first reconfigurable switch 31, a second reconfigurable switch 32, a third reconfigurable switch 33, and a fourth reconfigurable switch 34, the first reconfigurable switch 31 is provided in the first trench 41, the second reconfigurable switch 32 is provided in the second trench 42, the third reconfigurable switch 33 is provided in the third trench 43, and the fourth reconfigurable switch 34 is provided in the fourth trench 44.
Specifically, the reconfigurable switches include a first reconfigurable switch 31, a second reconfigurable switch 32, a third reconfigurable switch 33, and a fourth reconfigurable switch 34, the first reconfigurable switch 31 is provided in the first trench 41, the second reconfigurable switch 32 is provided in the second trench 42, the third reconfigurable switch 33 is provided in the third trench 43, and the fourth reconfigurable switch 34 is provided in the fourth trench 44. The reconfigurable switch of each groove is used for controlling the on-off of the corresponding groove. When the reconfigurable switch is switched off, the DGS structure takes effect, and the beam shape of the antenna is changed to enable the maximum beam of the antenna to point to the horizontal plane; when the reconfigurable switch is switched on, the DGS structure is invalid, and the antenna beam shape is recovered.
When the reconfigurable switches are in different working states, the antennas have different radiation forms, specifically, referring to fig. 4, 5 and 6, fig. 4 is a radiation pattern of a vertical section corresponding to the antenna provided by the embodiment of the present invention when the first reconfigurable switch and the third reconfigurable switch are turned on and when the four reconfigurable switches are all turned off, fig. 5 is a radiation pattern of a vertical section corresponding to the antenna provided by the embodiment of the present invention when the second reconfigurable switch and the fourth reconfigurable switch are turned on and when the four reconfigurable switches are all turned off, and fig. 6 is a radiation pattern of a vertical section corresponding to the antenna provided by the embodiment of the present invention when the four reconfigurable switches are all turned on and when the four reconfigurable switches are all turned off. As can be seen from fig. 4, when the first reconfigurable switch 31 and the third reconfigurable switch 33 are turned on, the 2.4G pattern of the antenna is tilted upward, and the 5G pattern is tilted upward in the opposite direction. As can be seen from fig. 5, when the second reconfigurable switch 32 and the fourth reconfigurable switch 34 are turned on, the 2.4G pattern of the antenna is both down, and the 5G pattern is up. As can be seen from fig. 6, when all the four reconfigurable switches are turned on, the 2.4G beams of the antenna are dispersed, and the influence of the upper slot is relatively large, so that the maximum radiation direction is tilted upward, and the 5G pattern is tilted upward. The final result is shown in table 1, where table 1 shows the antenna performance corresponding to the antenna provided in this embodiment of the present invention in different switch states.
TABLE 1 antenna Performance for antennas in different switch states
As a modification of the above, one end of each of the first groove 41, the second groove 42, the third groove 43, and the fourth groove 44 communicates with the edge of the dielectric substrate 5.
Specifically, the first groove 41, the second groove 42, the third groove 43, and the fourth groove 44 each have one end communicating with the edge of the dielectric substrate 5. When the dielectric substrate 5 is rectangular, one end of each of the first trench 41 and the third trench 43 is communicated with the first edge of the rectangular dielectric substrate 5, one end of the second trench 42 is communicated with the second edge of the rectangular dielectric substrate 5, one end of the fourth trench 44 is communicated with the third edge of the rectangular dielectric substrate 5, the first edge is perpendicular to the second edge and the fourth edge, and the second edge is parallel to the fourth edge.
As an improvement of the scheme, the reconfigurable switch comprises a radio frequency switch, a PIN diode or a variable capacitor.
In particular, the types of reconfigurable switches include radio frequency switches, PIN diodes or variable capacitors. The radio frequency switch and the PIN diode are switched on and off by controlling the on and off of an internal circuit, and the variable capacitor, namely the variable capacitor, is switched on and off by changing the capacitance.
As an improvement of the above scheme, when the reconfigurable switch is a radio frequency switch, the reconfigurable switch includes six pins, two of the six pins are used for connecting with a CPU and receiving a control signal of the CPU to control a working state of the radio frequency switch, and one pin is connected to one side of the trench and used as a signal input end; one pin is connected with the other side of the groove and used as a signal output end; one pin is suspended; one pin is grounded.
Specifically, when the reconfigurable switch is a radio frequency switch, the reconfigurable switch includes six pins. Preferably, the radio frequency switch is model RTC6619 SP. Referring to fig. 7, a schematic circuit diagram of an rf switch according to the embodiment of the present invention is shown, and a simplified structure diagram of a switch pin of the rf switch can be seen in fig. 8. The six pins are respectively VC1, VC2, RFC, RF1, RF2 and GND, wherein two pins VC1 and VC2 are used for connecting a CPU (central processing unit), specifically a GPIO (general purpose input/output) port of a main chip and used for receiving a control signal of the CPU to control the working state of the radio frequency switch. One pin RFC is connected to one side of the trench as a signal input. A pin RF1 is connected to the other side of the trench as a signal output. One pin RF2 is floating, that is, only the RFC-RF1 path is used in the present invention. One pin GND is grounded. The control signal of the CPU includes a high level and a low level. See table 2 for a truth table for the rf switch. As can be seen from table 2, when VC1 is high and VC2 is low, the switch is turned on; when VC1 is low and VC2 is high, the switch is open.
Table 2 truth table of radio frequency switch
| VC1 | VC2 | |
| RFC-RF1 | H | L |
| RFC-RF2 | L | H |
As an improvement of the scheme, the grooves are all L-shaped grooves.
Specifically, the grooves are all L-shaped grooves, that is, the first groove 41, the second groove 42, the third groove 43, and the fourth groove 44 are all L-shaped grooves.
Another embodiment of the present invention further provides an antenna apparatus including the antenna according to any one of the above embodiments. The specific structure of the antenna may refer to the related description of the above embodiments, and is not described herein again.
To sum up, according to the antenna and the antenna device provided by the embodiments of the present invention, the ground plate is provided with the defected ground structure, the four L-shaped grooves are added, and the reconfigurable switch is added in the grooves to implement on-off, so that the directional diagram of the antenna can implement three radiation modes of upward tilting, horizontal tilting, and downward tilting, thereby implementing the switching of antenna radiation in the horizontal plane and the tilt angle, and simultaneously considering signals of upper and lower floors, and meeting the application requirements of wireless communication coverage of a multi-story building. The antenna is a monopole dual-frequency antenna, and the dual-frequency antenna function is realized by utilizing one antenna structure, so that the antenna is small in size and easy to miniaturize; meanwhile, the antenna is low in cost, does not have high-cost devices, and is easy to apply to household products.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An antenna is characterized by comprising a dielectric substrate, a first monopole antenna, a second monopole antenna and a reconfigurable switch; the front side and the back side of the medium substrate are both grounded; the first monopole antenna and the second monopole antenna are both arranged on the front surface of the dielectric substrate; the ground plane of the dielectric substrate is also provided with a defect ground structure, and the reconfigurable switch is arranged in the defect ground structure; the defected ground structure comprises a first group of grooves and a second group of grooves, wherein the first group of grooves is close to the first monopole antenna, and the second group of grooves is close to the second monopole antenna.
2. The antenna of claim 1, wherein the front surface of the dielectric substrate is divided into two sides, the first monopole antenna being located on one side and the second monopole antenna being located on the other side.
3. The antenna of claim 1, wherein the first monopole antenna and the second monopole antenna each include a first leg, a second leg, and a third leg; the first branch node is provided with a feed point, and the first branch node further comprises a first rectangular block, a trapezoidal block and a second rectangular block which are sequentially connected from the feed point to the extending direction of the first branch node and have gradually increased widths; the second branch knot and the third branch knot are rectangular blocks, the short side of the second branch knot is connected with the short side of the second rectangular block, the second branch knot is connected with the second rectangular block on the same straight line, the third branch knot is connected with the long side of the second branch knot perpendicularly, and the third branch knot is connected with the feed point on the same side.
4. The antenna of claim 3, wherein the first set of slots includes a first slot and a second slot, the first slot being proximate the feed point of the first monopole antenna, the second slot being proximate the second leg of the first monopole antenna, and the second slot having a length of slot parallel to the third leg of the first monopole antenna;
the second group of grooves comprises a third groove and a fourth groove, the third groove is close to the feed point of the second monopole antenna, the fourth groove is close to the second branch of the second monopole antenna, and the fourth groove is provided with a section of groove which is parallel to the third branch of the second monopole antenna.
5. The antenna of claim 4, wherein the reconfigurable switches include a first reconfigurable switch, a second reconfigurable switch, a third reconfigurable switch, and a fourth reconfigurable switch, the first reconfigurable switch disposed within the first trench, the second reconfigurable switch disposed within the second trench, the third reconfigurable switch disposed within the third trench, and the fourth reconfigurable switch disposed within the fourth trench.
6. The antenna of claim 4, wherein the first trench, the second trench, the third trench, and the fourth trench each have one end in communication with an edge of the dielectric substrate.
7. The antenna of claim 1, wherein the types of reconfigurable switches include radio frequency switches, PIN diodes, or variable capacitors.
8. The antenna of claim 1, wherein when the reconfigurable switch is a radio frequency switch, the reconfigurable switch comprises six pins, two of the six pins are used for connecting to a CPU and receiving a control signal of the CPU to control the operating state of the radio frequency switch, and one pin is connected to one side of the trench and used as a signal input end; one pin is connected with the other side of the groove and used as a signal output end; one pin is suspended; one pin is grounded.
9. The antenna of any of claims 1-8, wherein the grooves are all L-shaped slots.
10. An antenna arrangement, characterized in that it comprises an antenna according to any of claims 1-9.
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| CN202110341060.XA CN113178696A (en) | 2021-03-30 | 2021-03-30 | Antenna and antenna equipment |
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| CN202110341060.XA CN113178696A (en) | 2021-03-30 | 2021-03-30 | Antenna and antenna equipment |
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| CN (1) | CN113178696A (en) |
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| CN114094325A (en) * | 2021-11-02 | 2022-02-25 | 禾邦电子(苏州)有限公司 | UWB dual-antenna structure |
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| CN114094325B (en) * | 2021-11-02 | 2023-08-29 | 禾邦电子(苏州)有限公司 | UWB double-antenna structure |
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