CN108539380A - Radio-frequency antenna, matching network, wireless communication device and bluetooth headset - Google Patents
Radio-frequency antenna, matching network, wireless communication device and bluetooth headset Download PDFInfo
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- CN108539380A CN108539380A CN201810410850.7A CN201810410850A CN108539380A CN 108539380 A CN108539380 A CN 108539380A CN 201810410850 A CN201810410850 A CN 201810410850A CN 108539380 A CN108539380 A CN 108539380A
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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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
Abstract
This application involves a kind of radio-frequency antenna, inverse-F antenna, matching network, wireless communication device and bluetooth headsets.Radio-frequency antenna includes inverse-F antenna and the first impedance unit, inverse-F antenna includes radiating element, vertical cell and ground unit, radiating element includes first level unit and the second horizontal cell, one end of first level unit is connect with ground unit and vertical cell, and the other end of first level unit is connect by the first impedance unit with the second horizontal cell.In the radiating element of the first impedance unit insertion inverse-F antenna in said radio-frequency antenna, the frequency point of radio-frequency antenna resonance point can be reduced, the length of radio-frequency antenna is reduced.
Description
Technical field
This application involves radio-frequency antenna technical fields, are filled more particularly to a kind of radio-frequency antenna, matching network, wireless communication
It sets and bluetooth headset.
Background technology
Currently, in order to meet the needs of user is convenient for carrying, there is small ruler in the terminal device with wireless communication function
The trend of very littleization, being dimensioned for terminal device are smaller and smaller.
Terminal device with wireless communication function needs to carry out the transmitting-receiving of wireless signal by antenna, and antenna length is general
The a quarter for reaching communication frequency corresponding wavelength is needed, therefore there are limit ranges for the size of antenna and size.
Currently, radio-frequency antenna is difficult to put the smaller and smaller terminal device of size into, the size of antenna cannot be satisfied end
The smaller and smaller size requirements of end equipment, in order to meet the requirement of communication frequency, the size of antenna suffers from communication frequency
The limitation of rate corresponding wavelength, therefore there is limitation in the antenna length of radio-frequency antenna.
Invention content
Based on this, it is necessary to there are problems that limitation for the antenna length of radio-frequency antenna, provide a kind of radio-frequency antenna,
F antennas, matching network, wireless communication device and bluetooth headset.
A kind of radio-frequency antenna, including inverse-F antenna and the first impedance unit, inverse-F antenna include radiating element, vertical cell and
Ground unit, radiating element include first level unit and the second horizontal cell, one end of first level unit and ground unit
It is connected with vertical cell, the other end of first level unit is connect by the first impedance unit with the second horizontal cell.
In the radiating element of the first impedance unit insertion inverse-F antenna in said radio-frequency antenna, radio-frequency antenna can be reduced
The frequency point of resonance point reduces the length of radio-frequency antenna.
In one embodiment, radio-frequency antenna further includes the second impedance unit, and the second impedance unit is connect with ground wire, ground connection
Unit is connect by the second impedance unit with ground wire.
Said radio-frequency antenna, first, radiofrequency signal can be transmitted to ground unit by vertical cell, pass through the second impedance
Unit is transmitted to earth point, relative to matching way over the ground on the transmission line, radiofrequency signal is directly transferred on the ground, radio frequency
Signal significantly have passed through radiant loop, is effectively utilized the energy for being stored in the second impedance unit, that is, partial loss is utilized
Radiation energy, improve the radiation efficiency of radiating element；Secondly, impedance is formed by the second impedance unit and radio-frequency antenna
Match, eliminates the reactive component in radio-frequency antenna input impedance, make characteristic impedance of the resistive component close to feeder line, so as to
Reach optimal use situation in radio-frequency antenna；Moreover, by the ratio of impedance between the second impedance unit and the first impedance unit,
The resonance frequency point of radio-frequency antenna can be finely tuned.
A kind of radio-frequency antenna, including inverse-F antenna and the second impedance unit, the second impedance unit are connect with ground wire, and ground connection is single
Member is connect by the second impedance unit with ground wire.
The ground unit of inverse-F antenna is accessed ground wire by the second impedance unit in said radio-frequency antenna, can reduce radio frequency
The frequency point of antenna resonance point reduces the length of radio-frequency antenna.
A kind of radio-frequency antenna, including monopole antenna and the first impedance unit, monopole antenna include radiating element and hang down
Straight unit, radiating element include first level unit and the second horizontal cell, and one end and the vertical cell of first level unit connect
It connects, the other end of first level unit is connect by the first impedance unit with the second horizontal cell.
In the radiating element of the first impedance unit insertion monopole antenna in said radio-frequency antenna, radio frequency day can be reduced
The frequency point of line resonance point reduces the length of radio-frequency antenna.
In one embodiment, radio-frequency antenna, further includes the second impedance unit, and one end and the ground wire of the second impedance unit connect
It connects, the other end of the second impedance unit is connect with antenna node, wherein antenna node is the connection of radiating element and vertical cell
Point.
Said radio-frequency antenna, said radio-frequency antenna, first, radiofrequency signal can be transmitted to the second impedance by vertical cell
Unit is transmitted to earth point by the second impedance unit, relative to matching way over the ground on the transmission line, radiofrequency signal is straight
It connecing and is transmitted on the ground, radiofrequency signal significantly have passed through radiant loop, be effectively utilized the energy for being stored in the second impedance unit,
The radiation energy of partial loss is utilized, improves the radiation efficiency of radiating element；Secondly, pass through the second impedance unit and radio frequency
Antenna forms impedance matching, eliminates the reactive component in radio-frequency antenna input impedance, makes resistive component close to feeder line
Characteristic impedance, in order to which radio-frequency antenna reaches optimal use situation；Moreover, passing through the second impedance unit and the first impedance unit
Ratio, the resonance frequency point of radio-frequency antenna can be finely tuned.
A kind of radio-frequency antenna, including monopole antenna and the second impedance unit, one end and the ground wire of the second impedance unit connect
It connects, the other end of the second impedance unit is connect with antenna node, wherein antenna node is the connection of radiating element and vertical cell
Point, monopole antenna include radiating element and vertical cell.
Antenna node is connect by the second impedance unit in said radio-frequency antenna with ground wire, can reduce radio-frequency antenna resonance
The frequency point of point, reduces the length of radio-frequency antenna.
A kind of matching network, including the first impedance unit and the second impedance unit；
The first level unit of one end of first impedance unit and the radiating element of radio-frequency antenna connects, the first impedance unit
The other end and the second horizontal cell of radiating element connect, wherein radio-frequency antenna includes radiating element and vertical cell, radiation
Unit includes first level unit and the second horizontal cell, and first level unit is connect with vertical cell；
The antenna node of one end access radio-frequency antenna of second impedance unit, the other end and the ground wire of the second impedance unit connect
It connects, wherein antenna node is the tie point of radiating element and vertical cell.
Above-mentioned matching network forms impedance matching by the second impedance unit and radio-frequency antenna, eliminates radio-frequency antenna first
Reactive component in input impedance makes characteristic impedance of the resistive component close to feeder line, in order to which radio-frequency antenna reaches
Optimal use situation；Secondly, by the ratio of the second impedance unit and the first impedance unit, the resonance of radio-frequency antenna can be finely tuned
Frequency point.
In one embodiment, radio-frequency antenna is accessed in one end of the second impedance unit by the ground unit of radio-frequency antenna
Antenna node, wherein radio-frequency antenna further includes ground unit.
Above-mentioned matching network so that radio-frequency antenna increases earth-return circuit, can effectively improve the anti-quiet of radio-frequency antenna
Electrical property.
A kind of wireless communication device, including radio-frequency antenna or matching network.
The size of above-mentioned wireless communication device, radio-frequency antenna can be adjusted according to pcb board material, shell or the size of assembly
Section, flexibly is adapted in the wireless communication device product of small size, by reducing the size of radio-frequency antenna, can reduce wireless
The size of communication device.
A kind of bluetooth headset, including radio-frequency antenna or matching network.
The size of above-mentioned bluetooth headset, radio-frequency antenna can be adjusted according to pcb board material, shell or the size of assembly,
It flexibly is adapted in the bluetooth headset product of small size, by reducing the size of radio-frequency antenna, radio communication mold can be reduced
The size of block, in order to reduce the size of bluetooth headset.
Description of the drawings
Fig. 1 is the structural schematic diagram of radio-frequency antenna in one embodiment；
Fig. 2 is that the first impedance unit of radio-frequency antenna in one embodiment includes the structural schematic diagram of inductance；
Fig. 3 is the structural schematic diagram of the second impedance unit of radio-frequency antenna in one embodiment；
Fig. 4 is the structural schematic diagram that the second impedance unit includes inductance in one embodiment；
Fig. 5 is the structural schematic diagram that the second impedance unit includes capacitance in one embodiment；
Fig. 6 is the structural schematic diagram of radio-frequency antenna in one embodiment；
Fig. 7 is that the second impedance unit of radio-frequency antenna in one embodiment includes the structural schematic diagram of inductance；
Fig. 8 is the structural schematic diagram of radio-frequency antenna in one embodiment；
Fig. 9 is that the first impedance unit of radio-frequency antenna in one embodiment includes the structural schematic diagram of inductance；
Figure 10 is the structural schematic diagram of the second impedance unit of radio-frequency antenna in one embodiment；
Figure 11 is the structural schematic diagram that the second impedance unit includes inductance in one embodiment；
Figure 12 is the structural schematic diagram that the second impedance unit includes capacitance in one embodiment；
Figure 13 is the structural schematic diagram of radio-frequency antenna in one embodiment；
Figure 14 is that the second impedance unit of radio-frequency antenna in one embodiment includes the structural schematic diagram of inductance；
Figure 15 is the structural schematic diagram of matching network in one embodiment；
Figure 16 is the structural schematic diagram that matching network is grounded in one embodiment；
Figure 17 is the structural schematic diagram of radio-frequency antenna in another embodiment.
Specific implementation mode
It is with reference to the accompanying drawings and embodiments, right in order to make the object, technical solution and advantage of the application be more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
In one embodiment, as shown in FIG. 1, FIG. 1 is the structural schematic diagram of radio-frequency antenna in one embodiment, this implementations
Radio-frequency antenna includes inverse-F antenna and the first impedance unit 20 in example, and inverse-F antenna includes radiating element 110,120 and of vertical cell
Ground unit 130, radiating element 110 include first level unit 111 and the second horizontal cell 112, first level unit 111
One end is connect with ground unit and vertical cell 120, and the other end of first level unit 111 passes through the first impedance unit 20 and
Two horizontal cells 112 connect.
In the radiating element 110 of the first impedance unit 20 insertion inverse-F antenna in said radio-frequency antenna, radio frequency can be reduced
The frequency point of antenna resonance point reduces the length of radio-frequency antenna.
For example, when being limited by very small size of PCB, in proportion by after inverse-F antenna size reduction, after diminution
Not default enough the resonance frequency point of radio-frequency antenna length corresponds to quarter-wave length, the resonance frequency point of the inverse-F antenna after diminution
The resonance frequency point of full size inverse-F antenna can be higher than；When the radiating element that the first impedance unit 20 is embedded in inverse-F antenna after reducing
In 110 and radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency point.It is equivalent to, to humorous
The radio-frequency antenna that the frequency point that shakes determines is embedded in the radiating element 110 of inverse-F antenna by the first impedance unit 20, can reduce radio frequency
The size of antenna.
In one embodiment, the first impedance unit 20 includes resistance, capacitance, inductance or the device with impedance operator.
For example, the first impedance unit 20 can be inductance, as shown in Fig. 2, Fig. 2 is the of radio-frequency antenna in one embodiment
One impedance unit includes the structural schematic diagram of inductance, and radio-frequency antenna includes inverse-F antenna and inductance 21, inverse-F antenna in the present embodiment
Including radiating element 110, vertical cell 120 and ground unit 130, radiating element 110 includes first level unit 111 and second
One end of horizontal cell 112, first level unit 111 is connect with ground unit and vertical cell 120, first level unit 111
The other end connect with the second horizontal cell 112 by inductance 21.
Inductance 21 in said radio-frequency antenna is embedded in the radiating element 110 of inverse-F antenna, can reduce radio-frequency antenna resonance
The frequency point of point, reduces the length of radio-frequency antenna.When being limited by very small size of PCB, in proportion by inverse-F antenna size
After diminution, not default enough the resonance frequency point of radio-frequency antenna length after diminution corresponds to quarter-wave length, the inverted f after diminution
The resonance frequency point of antenna can be higher than the resonance frequency point of full size inverse-F antenna；When the spoke that inductance 21 is embedded in inverse-F antenna after reducing
Radio-frequency antenna is penetrated in unit 110 and formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency point.Quite
In, to resonance frequency point determine radio-frequency antenna, by inductance 21 be embedded in inverse-F antenna radiating element 110, radio frequency day can be reduced
The size of line.
In one embodiment, as shown in figure 3, Fig. 3 is the knot of the second impedance unit of radio-frequency antenna in one embodiment
Structure schematic diagram, radio-frequency antenna further include the second impedance unit 30, and the second impedance unit 30 is connect with ground wire, and ground unit passes through
Two impedance units 30 are connect with ground wire.
Said radio-frequency antenna, first, radiofrequency signal can be transmitted to ground unit by vertical cell 120, pass through second
Impedance unit 30 is transmitted to earth point, relative to matching way over the ground on the transmission line, is directly transferred to ground by radiofrequency signal
On, radiofrequency signal significantly have passed through radiant loop, is effectively utilized the energy for being stored in the second impedance unit 30, that is, is utilized
The radiation energy of partial loss improves the radiation efficiency of radiating element 110；Secondly, pass through the second impedance unit 30 and radio frequency day
Line forms impedance matching, eliminates the reactive component in radio-frequency antenna input impedance, makes resistive component close to feeder line
Characteristic impedance, in order to which radio-frequency antenna reaches optimal use situation；Moreover, passing through the second impedance unit 30 and the first impedance unit
The ratio of impedance between 20 can finely tune the resonance frequency point of radio-frequency antenna.
In one embodiment, the second impedance unit 30 includes resistance, capacitance, inductance or the device with impedance operator.
Said radio-frequency antenna according to the characteristic of the reactive component of radio-frequency antenna input impedance, accesses matched electricity first
Resistance, capacitance, inductance or device with impedance operator eliminate reactive component；Secondly, in the case where completing impedance matching function, significantly
Save the cost of matching network；And earth-return circuit is also added, the antistatic property of radio-frequency antenna can be effectively improved；Separately
Outside, impedance unit 30 can be the impedance circuit for having impedance operator, and impedance circuit can also make the resistive component of radio-frequency antenna
Close to the characteristic impedance of feeder line, in order to reduce the difficulty of feeder line design, the transmission of standard can also be directly used
Line, need not be in the Resistor-Capacitor Unit of matching radio-frequency antenna.
For example, regarding first level unit 111, the first impedance unit 20 and the second horizontal cell 112 as radiating element
110, the impedance of radiating element 110 is measured by network analysis, when the impedance of radiating element 110 is in capacitive, can use packet
The second impedance unit 31 of inductance is included to eliminate reactive component, as shown in figure 4, Fig. 4 is the second impedance list in one embodiment
Member includes the structural schematic diagram of inductance；When the impedance of radiating element 110 is in perception, the second resistance for including capacitance can be used
Anti- unit 32 eliminates reactive component, as shown in figure 5, Fig. 5 is the structure that second impedance unit includes capacitance in one embodiment
Schematic diagram.In addition, when using the second impedance unit 30 reactive component can not be completely eliminated, the first impedance unit can also be adjusted
20 amount of resistance forms the pair net of a resonance by the first impedance unit and the second impedance unit, to completely eliminate electricity
Anti- component.
In one embodiment, as shown in fig. 6, Fig. 6 is the structural schematic diagram of radio-frequency antenna in one embodiment, this implementation
Radio-frequency antenna includes inverse-F antenna and the second impedance unit 30 in example, and the second impedance unit 30 is connect with ground wire, ground unit 130
It is connect with ground wire by the second impedance unit 30.Inverse-F antenna includes radiating element 110, vertical cell 120 and ground unit 130.
The ground unit 130 of inverse-F antenna is accessed ground wire by the second impedance unit 30 in said radio-frequency antenna, can be reduced
The frequency point of radio-frequency antenna resonance point reduces the length of radio-frequency antenna.
For example, when being limited by very small size of PCB, in proportion by after inverse-F antenna size reduction, after diminution
Not default enough the resonance frequency point of radio-frequency antenna length corresponds to quarter-wave length, the resonance frequency point of the inverse-F antenna after diminution
The resonance frequency point of full size inverse-F antenna can be higher than；When the ground unit 130 of inverse-F antenna is accessed ground wire by the second impedance unit 30
And radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency point.It is equivalent to, to resonance frequency point
The ground unit 130 of inverse-F antenna is accessed ground wire by the second impedance unit 30, can reduce radio frequency by determining radio-frequency antenna
The size of antenna.
In one embodiment, the second impedance unit 30 includes resistance, capacitance, inductance or the device with impedance operator.
For example, the second impedance unit 30 can be inductance, as shown in fig. 7, Fig. 7 is the of radio-frequency antenna in one embodiment
Two impedance units include the structural schematic diagram of inductance, and radio-frequency antenna includes inverse-F antenna and inductance 31 in the present embodiment, inductance 31 with
Ground wire connects, and ground unit 130 is connect by inductance 31 with ground wire.
The ground unit 130 of inverse-F antenna is accessed ground wire by the inductance 31 in said radio-frequency antenna, can reduce radio-frequency antenna
Size.
In one embodiment, as shown in figure 8, Fig. 8 is the structural schematic diagram of radio-frequency antenna in one embodiment, this implementation
Radio-frequency antenna includes monopole antenna and the first impedance unit 20 in example, and monopole antenna includes radiating element 110 and vertical list
Member 120, radiating element 110 include first level unit 111 and the second horizontal cell 112, one end of first level unit 111 with
Vertical cell 120 connects, and the other end of first level unit 111 is connected by the first impedance unit 20 and the second horizontal cell 112
It connects.
In the radiating element 110 of the first impedance unit 20 insertion monopole antenna in said radio-frequency antenna, it can reduce
The frequency point of radio-frequency antenna resonance point reduces the length of radio-frequency antenna.
For example, when being limited by very small size of PCB, in proportion by after monopole antenna size reduction, reduce
Not default enough the resonance frequency point of radio-frequency antenna length afterwards corresponds to quarter-wave length, the monopole antenna after diminution it is humorous
The frequency point that shakes can be higher than the resonance frequency point of full size monopole antenna；Monopole day after the first impedance unit 20 is embedded in diminution
In the radiating element 110 of line and radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency point.
It is equivalent to, to the radio-frequency antenna that resonance frequency point determines, the radiating element of monopole antenna is embedded in by the first impedance unit 20
110, the size of radio-frequency antenna can be reduced.
In one embodiment, the first impedance unit 20 includes resistance, capacitance, inductance or the device with impedance operator.
For example, the first impedance unit 20 can be inductance, as shown in figure 9, Fig. 9 is the of radio-frequency antenna in one embodiment
One impedance unit includes the structural schematic diagram of inductance, and radio-frequency antenna includes monopole antenna and inductance 21, monopole in the present embodiment
Sub-antenna includes radiating element 110 and vertical cell 120, and radiating element 110 includes that first level unit 111 and second are horizontal single
Member 112, one end of first level unit 111 is connect with vertical cell 120, and the other end of first level unit 111 passes through inductance
21 connect with the second horizontal cell 112.
Inductance 21 in said radio-frequency antenna is embedded in the radiating element 110 of monopole antenna, can reduce radio-frequency antenna
The frequency point of resonance point reduces the length of radio-frequency antenna.When being limited by very small size of PCB, in proportion by monopole
After antenna size reduction, not default enough the resonance frequency point of radio-frequency antenna length after diminution corresponds to quarter-wave length, contracts
The resonance frequency point of monopole antenna after small can be higher than the resonance frequency point of full size monopole antenna；It is reduced when inductance 21 to be embedded in
In the radiating element 110 of monopole antenna afterwards and radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and is reached
Default resonance frequency point.It is equivalent to, to the radio-frequency antenna that resonance frequency point determines, the radiation list of monopole antenna is embedded in by inductance 21
Member 110, can reduce the size of radio-frequency antenna.
In one embodiment, as shown in Figure 10, Figure 10 is the second impedance unit of radio-frequency antenna in one embodiment
Structural schematic diagram, radio-frequency antenna further include the second impedance unit 30, and one end of impedance unit 30 is connect with ground wire, the second impedance list
The other end of member 30 is connect with antenna node, wherein antenna node is the tie point of radiating element 110 and vertical cell 120.
Said radio-frequency antenna, said radio-frequency antenna, first, radiofrequency signal can be transmitted to second by vertical cell 120
Impedance unit 30 is transmitted to earth point by the second impedance unit 30, relative to matching way over the ground on the transmission line, will penetrate
Frequency signal is directly transferred on the ground, and radiofrequency signal significantly have passed through radiant loop, be effectively utilized and be stored in the second impedance list
The radiation energy of partial loss is utilized in the energy of member 30, improve the radiation efficiency of radiating element 110；Secondly, pass through second
Impedance unit 30 forms impedance matching with radio-frequency antenna, eliminates the reactive component in radio-frequency antenna input impedance, makes resistive component
Close to the characteristic impedance of feeder line, in order to which radio-frequency antenna reaches optimal use situation；Moreover, passing through the second impedance list
The ratio of member 30 and the first impedance unit 20, can finely tune the resonance frequency point of radio-frequency antenna.
In addition, said radio-frequency antenna further includes the second impedance unit 30, one end of the second impedance unit 30 is connect with ground wire,
The other end of second impedance unit 30 is connect with antenna node, and the radio-frequency antenna of formation constitutes novel inverse-F antenna.
In one embodiment, the second impedance unit 30 includes resistance, capacitance, inductance or the device with impedance operator.
Said radio-frequency antenna according to the characteristic of the reactive component of radio-frequency antenna input impedance, accesses matched electricity first
Resistance, capacitance, inductance or device with impedance operator eliminate reactive component；Secondly, in the case where completing impedance matching function, significantly
Save the cost of matching network；And earth-return circuit is also added, the antistatic property of radio-frequency antenna can be effectively improved；Separately
Outside, impedance unit 30 can be the impedance circuit for having impedance operator, and impedance circuit can also make the resistive component of radio-frequency antenna
Close to the characteristic impedance of feeder line, in order to reduce the difficulty of feeder line design, the transmission of standard can also be directly used
Line, need not be in the Resistor-Capacitor Unit of matching radio-frequency antenna.
For example, regarding first level unit 111, the first impedance unit 20 and the second horizontal cell 112 as radiating element
110, the impedance of radiating element 110 is measured by network analysis, when the impedance of radiating element 110 is in capacitive, can use packet
The second impedance unit 31 of inductance is included to eliminate reactive component, as shown in figure 11, Figure 11 is the second impedance in one embodiment
Unit includes the structural schematic diagram of inductance；When the impedance of radiating element 110 is in perception, it includes the second of capacitance that can use
Impedance unit 32 eliminates reactive component, and as shown in figure 12, Figure 12 is that the second impedance unit includes capacitance in one embodiment
Structural schematic diagram.In addition, when using the second impedance unit 30 reactive component can not be completely eliminated, the first impedance can also be adjusted
The amount of resistance of unit 20 forms the pair net of a resonance by the first impedance unit and the second impedance unit, to disappear completely
Except reactive component.
In one embodiment, as shown in figure 13, Figure 13 is the structural schematic diagram of radio-frequency antenna in one embodiment, this reality
It includes monopole antenna and the second impedance unit 30 to apply radio-frequency antenna in example, and one end of the second impedance unit 30 is connect with ground wire,
The other end of second impedance unit 30 is connect with antenna node, wherein antenna node is radiating element 110 and vertical cell 120
Tie point, monopole antenna includes radiating element 110 and vertical cell 120.
Antenna node is connect by the second impedance unit 30 in said radio-frequency antenna with ground wire, and it is humorous can to reduce radio-frequency antenna
The frequency point to shake a little reduces the length of radio-frequency antenna.
For example, when being limited by very small size of PCB, in proportion by after monopole antenna size reduction, reduce
Not default enough the resonance frequency point of radio-frequency antenna length afterwards corresponds to quarter-wave length, the monopole antenna after diminution it is humorous
The frequency point that shakes can be higher than the resonance frequency point of full size monopole antenna；In antenna node is connect by the second impedance unit 30 with ground wire
And radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency point.It is equivalent to, to resonance frequency point
Antenna node is connect with ground wire by the second impedance unit 30, can reduce the size of radio-frequency antenna by determining radio-frequency antenna.
In one embodiment, the second impedance unit 30 includes resistance, capacitance, inductance or the device with impedance operator.
For example, the second impedance unit 30 can be inductance, as shown in figure 14, Figure 14 is radio-frequency antenna in one embodiment
Second impedance unit includes the structural schematic diagram of inductance, and radio-frequency antenna includes monopole antenna and inductance 31, electricity in the present embodiment
One end of sense 31 is connect with ground wire, and the other end of inductance 31 is connect with antenna node, wherein antenna node is radiating element 110
With the tie point of vertical cell 120, monopole antenna includes radiating element 110 and vertical cell 120.
The antenna node of monopole antenna is connect by the inductance 31 in said radio-frequency antenna with ground wire, can reduce radio frequency day
The size of line.
In one embodiment, as shown in figure 15, Figure 15 is the structural schematic diagram of matching network in one embodiment, this reality
It includes the first impedance unit 20 and the second impedance unit 30 to apply matching network in example；
The first level unit 111 of one end of first impedance unit 20 and the radiating element 110 of radio-frequency antenna connects, and first
The other end of impedance unit 20 is connect with the second horizontal cell 112 of radiating element 110, wherein radio-frequency antenna includes that radiation is single
Member 110 and vertical cell 120, radiating element 110 include first level unit 111 and the second horizontal cell 112, first level list
Member 111 is connect with vertical cell 120；
The antenna node of one end access radio-frequency antenna of second impedance unit 30, the other end and the ground of the second impedance unit 30
Line connects, wherein antenna node is the tie point of radiating element 110 and vertical cell 120.
Above-mentioned matching network forms impedance matching with radio-frequency antenna by the second impedance unit 30, eliminates radio frequency day first
Reactive component in line input impedance makes characteristic impedance of the resistive component close to feeder line, in order to which radio-frequency antenna reaches
To optimal use situation；Secondly, by the ratio of the second impedance unit 30 and the first impedance unit 20, radio-frequency antenna can be finely tuned
Resonance frequency point.
In one embodiment, as shown in figure 16, Figure 16 is the structural schematic diagram that matching network is grounded in one embodiment,
One end of second impedance unit 30 accesses the antenna node of radio-frequency antenna by the ground unit of radio-frequency antenna, wherein radio frequency day
Line further includes ground unit.
Above-mentioned matching network so that radio-frequency antenna increases earth-return circuit, can effectively improve the anti-quiet of radio-frequency antenna
Electrical property.
In one embodiment, the first impedance unit 20 includes resistance, capacitance, inductance or the device with impedance operator,
Second impedance unit 30 includes resistance, capacitance, inductance or the device with impedance operator.
Above-mentioned matching network can be made up of various forms of devices with impedance operator, improve radio-frequency antenna
The scope of application.
In one embodiment, the wireless communication device in the present embodiment includes radio-frequency antenna or matching network.
The size of above-mentioned wireless communication device, radio-frequency antenna can be adjusted according to pcb board material, shell or the size of assembly
Section, flexibly is adapted in the wireless communication device product of small size, by reducing the size of radio-frequency antenna, can reduce wireless
The size of communication device.
In one embodiment, the bluetooth headset in the present embodiment includes radio-frequency antenna or matching network.
The size of above-mentioned bluetooth headset, radio-frequency antenna can be adjusted according to pcb board material, shell or the size of assembly,
It flexibly is adapted in the bluetooth headset product of small size, by reducing the size of radio-frequency antenna, radio communication mold can be reduced
The size of block, in order to reduce the size of bluetooth headset.
In another embodiment, as shown in figure 17, Figure 17 is the structural schematic diagram of radio-frequency antenna in another embodiment,
In the present embodiment, it includes spoke that radio-frequency antenna, which includes inverse-F antenna, the first impedance unit 20 and the second impedance unit 30, inverse-F antenna,
Unit 110, vertical cell 120 and ground unit 130 are penetrated, radiating element 110 includes that first level unit 111 and second are horizontal single
Member 112, one end of first level unit 111 is connect with ground unit and vertical cell 120, first level unit 111 it is another
End is connect by the first impedance unit 20 with the second horizontal cell 112, and the second impedance unit 30 is connect with ground wire, and ground unit is logical
Impedance unit 30 is crossed to connect with ground wire.
When being limited by very small size of PCB, in proportion by after inverse-F antenna size reduction, the radio frequency after diminution
Not default enough the resonance frequency point of antenna length corresponds to quarter-wave length, and the resonance frequency point of the inverse-F antenna after diminution can be high
In the resonance frequency point of full size inverse-F antenna.When the first impedance unit 20 includes inductance 21, falling after the insertion of inductance 21 is reduced
In the radiating element 110 of F antennas and radio-frequency antenna is formed, the resonance frequency point of radio-frequency antenna can be reduced and reaches default resonance frequency
Point.
It, can when the impedance of radiating element 110 is in capacitive when measuring the impedance of radiating element 110 by network analysis
To use, to include the second impedance unit 30 of inductance 31 eliminate reactive component；When the impedance of radiating element 110 is in perception,
Reactive component can be eliminated using including the second impedance unit 30 of capacitance.In addition, when using 30 nothing of the second impedance unit
When method completely eliminates reactive component, the amount of resistance of the first impedance unit 20 can also be adjusted, the first impedance unit and second are passed through
Impedance unit forms the pair net of a resonance, to completely eliminate reactive component.
In said radio-frequency antenna, first, inductance 21 is embedded in the radiating element 110 of inverse-F antenna, can reduce radio-frequency antenna
The frequency point of resonance point reduces the length of radio-frequency antenna.Secondly, it is single can be transmitted to ground connection by vertical cell 120 for radiofrequency signal
Member is transmitted to earth point by impedance unit 30, and relative to matching way over the ground on the transmission line, radiofrequency signal is directly passed
It leads on the ground, radiofrequency signal significantly have passed through radiant loop, be effectively utilized the energy for being stored in impedance unit 30, that is, utilize
The radiation energy of partial loss improves the radiation efficiency of radiating element 110.In addition, passing through impedance unit 30 and radio-frequency antenna
Impedance matching is formed, the reactive component in radio-frequency antenna input impedance is eliminated, makes spy of the resistive component close to feeder line
Property impedance, in order to which radio-frequency antenna reaches optimal use situation.It, can be with moreover, by the ratio of impedance unit 30 and inductance 20
Finely tune the resonance frequency point of radio-frequency antenna.
Therefore, by the first impedance unit 20 and the second impedance unit 30, it is possible, firstly, to the parameter of matching network is adjusted,
The resonance point for dynamically adjusting antenna is become with adapting to radio-frequency antenna impedance caused by the hardware environment such as pcb board material, shell, assembly
The problem of change；In addition, the size of radio-frequency antenna can be adjusted according to pcb board material, shell or the size of assembly, neatly fit
In radio frequency products for all types of small sizes；And the matching element of transmission line can also be saved, reduce transmission line or feedback
The design difficulty of line, reduces cost.
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (10)
1. a kind of radio-frequency antenna, which is characterized in that including inverse-F antenna and the first impedance unit, the inverse-F antenna includes that radiation is single
Member, vertical cell and ground unit, the radiating element include first level unit and the second horizontal cell, the first level
One end of unit is connect with ground unit and vertical cell, and the other end of the first level unit passes through the first impedance list
It is first to be connect with second horizontal cell.
2. radio-frequency antenna according to claim 1, which is characterized in that further include the second impedance unit, second impedance
Unit is connect with ground wire, and the ground unit is connect by second impedance unit with the ground wire.
3. a kind of radio-frequency antenna, which is characterized in that including inverse-F antenna and the second impedance unit, second impedance unit and ground
Line connects, and ground unit is connect by second impedance unit with the ground wire.
4. a kind of radio-frequency antenna, which is characterized in that including monopole antenna and the first impedance unit, the monopole antenna includes
Radiating element and vertical cell, the radiating element include first level unit and the second horizontal cell, the first level list
One end of member is connect with vertical cell, and the other end of the first level unit passes through first impedance unit and described second
Horizontal cell connects.
5. to remove the radio-frequency antenna described in 4 according to right, which is characterized in that further include the second impedance unit, second impedance
One end of unit is connect with ground wire, and the other end of second impedance unit is connect with antenna node, wherein the antenna node
For the tie point of the radiating element and the vertical cell.
6. a kind of radio-frequency antenna, which is characterized in that including monopole antenna and the second impedance unit, second impedance unit
One end is connect with ground wire, and the other end of second impedance unit is connect with antenna node, wherein the antenna node is radiation
The tie point of unit and vertical cell, the monopole antenna include the radiating element and the vertical cell.
7. a kind of matching network, which is characterized in that including the first impedance unit and the second impedance unit；
The first level unit of one end of first impedance unit and the radiating element of radio-frequency antenna connects, first impedance
The other end of unit is connect with the second horizontal cell of the radiating element, wherein the radio-frequency antenna includes that the radiation is single
The first and described vertical cell, the radiating element include the first level unit and second horizontal cell, and described first
Horizontal cell is connect with the vertical cell；
The antenna node of the radio-frequency antenna, the other end of second impedance unit are accessed in one end of second impedance unit
It is connect with ground wire, wherein the antenna node is the tie point of the radiating element and the vertical cell.
8. matching network according to claim 7, which is characterized in that one end of second impedance unit is penetrated by described
The antenna node of the ground unit access radio-frequency antenna of frequency antenna, wherein the radio-frequency antenna further includes the ground unit.
9. a kind of wireless communication device, which is characterized in that include radio-frequency antenna as described in claim 1 to 6 any one or
Matching network as described in claim 7 to 8 any one.
10. a kind of bluetooth headset, which is characterized in that include the radio-frequency antenna or such as power as described in claim 1 to 6 any one
Profit requires the matching network described in 7 to 8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810410850.7A CN108539380B (en) | 2018-05-02 | 2018-05-02 | Radio frequency antenna, matching network, wireless communication device and Bluetooth headset |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810410850.7A CN108539380B (en) | 2018-05-02 | 2018-05-02 | Radio frequency antenna, matching network, wireless communication device and Bluetooth headset |
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| CN108539380A true CN108539380A (en) | 2018-09-14 |
| CN108539380B CN108539380B (en) | 2020-12-25 |
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| CN109301466A (en) * | 2018-10-08 | 2019-02-01 | 珠海市杰理科技股份有限公司 | Inverse-F antenna, matching network and bluetooth headset |
| CN110011943A (en) * | 2019-03-20 | 2019-07-12 | 珠海市杰理科技股份有限公司 | The adjustment method and device of electronic product commissioning device |
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Also Published As
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| CN108539380B (en) | 2020-12-25 |
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