CN104183914B - Wireless headphone and antenna for wireless headphone - Google Patents
Wireless headphone and antenna for wireless headphone Download PDFInfo
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- CN104183914B CN104183914B CN201310190309.7A CN201310190309A CN104183914B CN 104183914 B CN104183914 B CN 104183914B CN 201310190309 A CN201310190309 A CN 201310190309A CN 104183914 B CN104183914 B CN 104183914B
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Abstract
The invention provides a wireless headphone and an antenna for the wireless headphone. The antenna for the wireless headphone comprises a first coaxial cable, a radio frequency coupling capacitor, a first radio frequency choke coil and a second radio frequency choke coil, wherein the first end of the first coaxial cable is coupled with a sound-producing unit; the second end of the first coaxial cable is coupled with an audio amplifier; the first coaxial cable transmits audio signals to the sound-producing unit; the joint, adjacent to the second end, of first conductive shielding of the first coaxial cable is coupled with a radio frequency circuit unit via the radio frequency coupling capacitor; the first conductive shielding serves as a radiation part wirelessly receiving and transmitting radio frequency signals; the radio frequency coupling capacitor enables the radio frequency signals to pass through and stops the audio signals from entering the radio frequency circuit unit; the audio amplifier is coupled with the first coaxial cable via the first radio frequency choke coil and the second radio frequency choke coil; and the first radio frequency choke coil and the second radio frequency choke coil enable the audio signals to pass through and stop the radio frequency signals from entering the audio amplifier.
Description
Technical field
The present invention relates to a kind of antenna, and particularly a kind of antenna and wireless headset for wireless headset.
Background technology
With science and technology progress and consumer demand miniaturization moved towards by miniaturization to product, wireless headset is then by passing
That what is united covers the supra-aural that ear formula is moved towards to be miniaturized.With the progress of material science and technology, science and technology can be provided and meet similar electrical
The material that can and be miniaturized.Quasiconductor, the passive device of miniaturization such as chip package, or even the lithium battery of high-energy-density.
Wherein, although can be miniaturized but cannot keep to have the key element of electric property to be antenna.Miniaturization
Antenna such as ceramic antenna, although which can reach and remain to maintain certain characteristic, such as frequency under conditions of downsizing size
Resonance and low reflection coefficient, but another prior characteristic, i.e. antenna radiation efficiency, but decline to a great extent because of its miniaturization.
In the case of identical communication distance to be kept, must transmission power be improved to compensate the decline of antenna radiation efficiency.However, improving
Transmission power but cause power consumption increase and cause device use time shorten.In application, miniature antenna must still keep one
Fixed surrounding space, otherwise its characterstics of frequency resonance and reflection coefficient can be affected by surrounding component and be deteriorated, and this restriction is made again
Into the difficulty of the miniaturization of products.
The content of the invention
The embodiment of the present invention provides a kind of antenna and wireless headset for wireless headset, and which can be passed by coaxial wire
Defeated audio signal, meanwhile, by the use of coaxial wire conductive shield as transceiving radio frequency signal radiating element of antenna.
The embodiment of the present invention provides a kind of antenna for wireless headset, including the first coaxial wire, RF-coupled electricity
Appearance, the first radio frequency choke coil and the second radio frequency choke coil.First coaxial wire has first end and the second end, and first end is used
To couple pronunciation unit, the sound from audio frequency amplifier is transmitted to couple audio frequency amplifier, the first coaxial wire in the second end
Frequency signal is to pronunciation unit.First coaxial wire includes the first inner wire, the first insulating barrier around the first inner wire and encloses
Around the first conductive shield of the first insulating barrier.The contact at neighbouring second end of the first conductive shield is to couple radio circuit list
Unit, wherein, Department of Radiation of first conductive shield as wireless receiving and dispatching radiofrequency signal.The connecing adjacent to the second end of the first conductive shield
Point by RF-coupled electric capacity couple radio circuit unit, wherein, RF-coupled electric capacity passes through radiofrequency signal, and stop from
The audio signal of audio frequency amplifier enters radio circuit unit.Audio frequency amplifier is by leading in the first radio frequency choke coil coupling first
The contact at neighbouring second end of body.Audio frequency amplifier couples neighbouring second end of the first conductive shield by the second radio frequency choke coil
Contact.First radio frequency choke coil passes through the audio signal of audio frequency amplifier with the second radio frequency choke coil, and stops radio frequency letter
Number enter audio frequency amplifier.
The embodiment of the present invention provides a kind of wireless headset, including control device, pronunciation unit, the first coaxial wire, penetrates
Frequency coupled capacitor, the first radio frequency choke coil and the second radio frequency choke coil.Control device includes radio circuit unit and Audio Processing
Unit, audio treatment unit have audio frequency amplifier.First coaxial wire has first end and the second end, first end coupling
Pronunciation unit, the second end coupling audio frequency amplifier.The transmission of first coaxial wire is extremely sent out from the audio signal of audio frequency amplifier
Sound unit.First coaxial wire includes the first inner wire, the first insulating barrier around the first inner wire and insulate around first
First conductive shield of layer.The contact coupling radio circuit unit at neighbouring second end of the first conductive shield.First conductive shield
As the Department of Radiation of wireless receiving and dispatching radiofrequency signal.The contact at neighbouring second end of the first conductive shield passes through RF-coupled electric capacity coupling
Connect radio circuit unit.RF-coupled electric capacity passes through radiofrequency signal, and stops that the audio signal from audio frequency amplifier is entered
Radio circuit unit.Audio frequency amplifier couples the contact at neighbouring second end of the first inner wire by the first radio frequency choke coil.Sound
Audio amplifier couples the contact at neighbouring second end of the first conductive shield by the second radio frequency choke coil.First radio frequency choke coil with
Second radio frequency choke coil passes through the audio signal of audio frequency amplifier, and stops that radiofrequency signal enters audio frequency amplifier.
In sum, the embodiment of the present invention provides a kind of antenna and its wireless headset for wireless headset, and this is used for nothing
The antenna and its wireless headset of line earphone can transmit audio signal by coaxial wire, while using the conduction of coaxial wire
Shield the radiating element of antenna as transceiving radio frequency signal.
To enable the feature and technology contents that are further understood that the present invention, refer to below in connection with the present invention specifically
Bright and accompanying drawing, but these explanations are only used for illustrating the present invention with institute's accompanying drawings, rather than scope of the presently claimed invention is made
Any restriction.
Description of the drawings
Fig. 1 is the schematic appearance of wireless headset provided in an embodiment of the present invention.
Fig. 2 is the circuit block diagram of wireless headset provided in an embodiment of the present invention.
Fig. 3 is the schematic diagram of the impedance matching of adjustment earphone antenna provided in an embodiment of the present invention.
Fig. 4 is the schematic diagram of the first coaxial wire of wireless headset provided in an embodiment of the present invention.
Fig. 5 is the schematic diagram of the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided.
Fig. 6 is the schematic diagram of the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided.
Fig. 7 is the schematic diagram of the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided.
Fig. 8 is the schematic diagram of the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided.
Fig. 9 is the schematic diagram of the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided.
Figure 10 be another embodiment of the present invention provide the first coaxial wire of wireless headset, the second coaxial wire with
The schematic diagram of the annexation of triaxial cable line.
【Symbol description】
1：Wireless headset
11：Pronunciation unit
12：Control device
13、13’：First coaxial wire
13a：First end
13b、P1：Second end
131、131’：First inner wire
132、132’：First insulating barrier
133、133’：First conductive shield
121、RF：Radio circuit unit
121a：RF IC
121b：Radio frequency matching circuit
122：Audio treatment unit
122a、Amp1：Audio frequency amplifier
123、C2：RF-coupled electric capacity
124：First radio frequency choke coil
125：Second radio frequency choke coil
14：Second coaxial wire
141：Second inner wire
142：Second insulating barrier
143：Second conductive shield
15：Triaxial cable line
151：3rd inner wire
152：3rd insulating barrier
153：3rd conductive shield
P2、P3：End points
SP1：Earphone
CA1、CA2、CA2’、CA3：Coaxial wire
L1、L2、L3：Length
A：Node
M1：Match circuit
Specific embodiment
(embodiment of the antenna and its wireless headset of wireless headset)
Prior art is low because of operating frequency（Between tens of～hundreds of MHz）Its wavelength is between 0.5 meter（Corresponding to 600MHz）With 3
Rice（Corresponding to 100MHz）Between.Therefore the earphone cord of general several tens cm length, equivalent between 1/2 wavelength to 1/10 wavelength it
Between, it is easy to match antenna and be used.
With technological progress, main flow operating frequency is promoted to 2.4GHz, only 12.5 centimetres of its wavelength, causes general tens of lis
2 times to 3 times wavelength of the earphone cord of meter Chang Du equivalent to 2.4GHz, make which be difficult to match as 2.4GHz frequencies because its wavelength is oversize
Section antenna is used.
To solve to be lifted because of operating frequency, cause earphone line length that the problem for matching is difficult more than operating frequency wavelength,
Therefore it is the implementation of antenna that the present invention provides a kind of new paragon by earphone cord application, herein proposes and is existed with solving earphone cord
2.4GHz working frequency range, the oversize problem for being difficult to match of its effective wavelength.
In order to solve problem of the prior art, the embodiment of the present invention proposes a kind of antenna and wireless ear for wireless headset
Machine.
It is the schematic appearance of wireless headset provided in an embodiment of the present invention referring to Fig. 1 and Fig. 2, Fig. 1, Fig. 2 is
The circuit block diagram of wireless headset provided in an embodiment of the present invention.Wireless headset 1 include control device 12, pronunciation unit 11,
One coaxial wire 13, RF-coupled electric capacity 123, the first radio frequency choke coil 124 and the second radio frequency choke coil 125.Control device
12 include radio circuit unit 121 and audio treatment unit 122, and audio treatment unit 122 has audio frequency amplifier 122a.Radio frequency
Circuit unit 121 includes RF IC 121a and radio frequency matching circuit 121b, but the present invention does not limit radio circuit list
The implementation of unit 121.As shown in figure 1, the sheet of control device 12 can house RF-coupled electric capacity 123, the first radio frequency in vivo resisting
Stream the 124, second radio frequency choke coil 125 of circle, radio circuit unit 121 and audio treatment unit 122.Wireless headset 1 can be ear
Hanging type wireless earphone or ear type wireless headset, the present invention do not limit the surface structure and shape of pronunciation unit 11.
Fig. 2 is referred again to, the first coaxial wire 13 has first end 13a and the second end 13b, and the coupling of first end 13a is sent out
Sound unit 11, the second end 13b couple the audio frequency amplifier 122a of audio treatment unit 122.The transmission of first coaxial wire 13 comes
Audio signal from audio frequency amplifier 122a is to pronunciation unit 11.First coaxial wire 13 includes the first inner wire 131, surrounds
First insulating barrier 132 of the first inner wire 131, with the first conductive shield 133 around the first insulating barrier 132.In addition, generally existing
The appearance meeting coated insulation layer of the first conductive shield 133 of the first coaxial wire 13, the insulating barrier are not showed that in Fig. 2
In.
Fig. 2 is referred again to, the contact of the neighbouring second end 13b of the first conductive shield 133 couples radio circuit unit 121, its
In, Department of Radiation of first conductive shield 133 as wireless receiving and dispatching radiofrequency signal.In more detail, the neighbour of the first conductive shield 133
The contact of nearly second end 13b couples radio circuit unit 121 by RF-coupled electric capacity 123, wherein, RF-coupled electric capacity 123
Pass through radiofrequency signal, and stop that the audio signal from audio frequency amplifier 122a enters radio circuit unit.Audio frequency amplifier
122a couples the contact of the neighbouring second end 13b of the first inner wire 131 by the first radio frequency choke coil 124.Audio frequency amplifier
122a couples the contact of the neighbouring second end 13b of the first conductive shield 133 by the second radio frequency choke coil 125.First radio frequency resists
Stream circle 124 passes through the audio signal of audio frequency amplifier 122a with the second radio frequency choke coil 125, and stops that radiofrequency signal enters sound
Audio amplifier 122a.
In other words, wireless headset 1 includes the antenna for wireless headset, and the antenna includes the first coaxial wire
13rd, RF-coupled electric capacity 123, the first radio frequency choke coil 124 and the second radio frequency choke coil 125.First coaxial wire 13 has
First end 13a and the second end 13b, to couple pronunciation unit 11, the second end 13b is to couple audio frequency amplification for first end 13a
Device 122a, the first coaxial wire 13 transmit audio signal from audio frequency amplifier 122a to pronunciation unit 11.First is coaxial
Cable 13 includes the first inner wire 131, the first insulating barrier 132 around the first inner wire 131 and surrounds the first insulating barrier 132
The first conductive shield 133.The contact of the neighbouring second end 13b of the first conductive shield 133 is to couple radio circuit unit
121, wherein, Department of Radiation of first conductive shield 133 as wireless receiving and dispatching radiofrequency signal.Neighbouring the of first conductive shield 133
The contact of two end 13b couples radio circuit unit 121 by RF-coupled electric capacity 123, wherein, RF-coupled electric capacity 123 makes to penetrate
Frequency signal passes through, and stops that the audio signal from audio frequency amplifier 122a enters radio circuit unit 121.Audio frequency amplifier
122a couples the contact of the neighbouring second end 13b of the first inner wire 131 by the first radio frequency choke coil 124.Audio frequency amplifier
122a couples the contact of the neighbouring second end 13b of the first conductive shield 133 also by the second radio frequency choke coil 125.First radio frequency
Choke coil 124 passes through the audio signal of audio frequency amplifier 122a with the second radio frequency choke coil 125, and stops that radiofrequency signal is entered
Audio frequency amplifier 122a.
From the foregoing, the Department of Radiation of the antenna of wireless headset 1 is with the first conductive shield of the first coaxial wire 13
133 realize.For the radiofrequency signal of radio circuit unit 121, the first inner wire 13 of the first coaxial wire 13 can be considered
Ground connection, the ground connection of the first inner wire 13 can be by the shared ground connection of audio frequency amplifier 122a and radio circuit unit 121 come real
It is existing, for example：The ground connection of radio circuit unit 121 and audio frequency amplifier 122a can be connected to the shared ground plane of circuit board.Penetrate
Frequency signal is by 123 the first conductive shield of feed-in 133 of RF-coupled electric capacity, the radio band of the 2.4GHz with regard to commonly using（Including indigo plant
The frequency band of tooth and wireless network）For, the first conductive shield 133 by the length that the second end 13b is started at can be between 6 centimetres extremely
Between 8 centimetres, now Department of Radiation of first conductive shield 133 as antenna, which is operated under the resonant frequency of 1/4 wavelength.Change
Sentence is talked about, the length of the first coaxial wire 13（That is the length of the first conductive shield 133）Can be between the operation frequency of antenna
Between 0.5 times of corresponding wavelength and 0.65 times.It is noted that the first coaxial wire 13 is to transmit audio frequency simultaneously
Signal and radiofrequency signal.First inner wire 131 and first conductive shield 133 quilt of the audio signal by the first coaxial wire 13
It is transferred to pronunciation unit 11.Specifically, radiofrequency signal is by 133 wireless receiving and dispatching of the first conductive shield.
It is noted that the first conductive shield 133 can be formed with netted braiding with a plurality of wire, or to manage
Shape conductor（Such as copper pipe）Realize.The present invention does not limit the implementation of the first conductive shield 133.Typically, this area
Technical staff can be readily understood by, and common coaxial wire is with pliability.Using with flexual first coaxial electrical
Cable 13, can allow the user of wireless headset easily to wear pronunciation unit 11.
Fig. 3 is refer to, Fig. 3 is the schematic diagram of the impedance matching of adjustment earphone antenna provided in an embodiment of the present invention.In Fig. 3
Earphone SP1 be pronunciation unit 11 in Fig. 2.Below for 2.4GHz antenna for example illustrating, but the present invention is not
Therefore limit.Coaxial wire C1 is connected into earphone SP1（Earphone horn）When, because of pronunciation unit SP1, which presents in 2.4GHz and hinders
Anti- Z is R+X, wherein, R is real part, the imaginary part that X is impedance of impedance, makes its impedance using coaxial wire C1 adjustment length L1
For R1, X is equal to 0 to Z1, thereby reaches appropriate impedance matching.Principle explanation by more than, refer to the further of following Fig. 4
Illustrate.
It is the first coaxial wire of wireless headset provided in an embodiment of the present invention referring to Fig. 2 and Fig. 4, Fig. 4
Schematic diagram.For radio circuit unit, with 50 ohm（Ω）Under conditions of impedance matching, the impedance of pronunciation unit 11
It is not necessarily 50 ohm（E.g.：16 ohm or 32 ohm）.Now, in order that the impedance seen into by the second end 13b is close to 50
Ohm, can pass through to finely tune the length of the first coaxial wire 13（The length of the first conductive shield 133）To make by the second end 13b
The impedance seen into is close to 50 ohm.Or, can also pass through to adjust the resistance value of radio frequency matching circuit 121b, so that by radio frequency collection
50 ohm are close to toward the impedance that radio frequency matching circuit 121b is looked over into circuit 121a.Radio frequency matching circuit 121b can include electricity
The passive devices such as sense, resistance or electric capacity.
(another embodiment of the antenna and its wireless headset of wireless headset)
In previous embodiment, connect pronunciation unit and radio frequency matching circuit merely with a coaxial wire, relatively,
The connected mode of the coaxial wire using more than two is provided in the present embodiment.
It is the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided referring to Fig. 3 and Fig. 5, Fig. 5
Schematic diagram.Coaxial wire CA2 of the utilization level impedance for Zo, length L2 of coaxial wire is operating frequency 2.4GHz
1/4 wavelength（λg/4）, the present embodiment is illustrated so that operating frequency is as 2.4GHz as an example, but therefore the present invention does not limit.By Fig. 3
Middle reached impedance R1 matchings are Z2（Equal to 50 Ω）, wherein, coaxial wire CA2'sIt is noted that when the coaxial wire of following more than two is connected to each other,
The inner wire of adjacent coaxial wire is connected interlaced with each otherly with conductive shield.The explanation of detailed connected mode, Ke Yican
According to the narration with regard to Figure 10, the principle of impedance matching is next first illustrated.
It is the impedance matching of the adjustment earphone antenna that another embodiment of the present invention is provided referring to Fig. 5 and Fig. 6, Fig. 6
Schematic diagram.As the impedance Z 2 reached in Fig. 2 has been matched as 50 Ω, therefore the coaxial wire of any additional random length L3
CA3 is accordingly to be regarded as identical coaxial wire, and its length does not affect antenna（Include coaxial wire CA1 and coaxial wire
CA2, two line lengths and be L1+L2）Matching properties, therefore can be random length, namely total length（Including coaxial wire CA1,
Coaxial wire CA2 and coaxial wire CA3, length and L1+L2+L3）The resonance of antenna can not be affected for random length.
Fig. 7 is refer to, Fig. 7 is the schematic diagram of the element annexation of the wireless headset that another embodiment of the present invention is provided.
On the implementation, audio frequency amplifier Amp1（That is the audio frequency amplifier 122a of Fig. 2）By radio frequency choke coil 124,125 coupled to coaxial
Audio signal is sent to earphone SP1 by cable CA1, CA2, CA3.And radio circuit unit R F（That is the radio circuit unit of Fig. 2
121）Then it is connected with coaxial wire CA3 by RF-coupled electric capacity 123, then by earphone SP1, coaxial wire CA1, CA2
The antenna for being constituted is transmitted or receives radiofrequency signal.In addition, the node A of coaxial wire CA3 is also audio signal feed-in
Point, it is impossible to be directly grounded, therefore node A is used as radio frequency ground connection by RF-coupled electric capacity C2.
Embodiments of the invention are the foregoing is only, which simultaneously is not used to limit to scope of the presently claimed invention.For example, may be used
Antenna gain is improved to increase antenna length with the number for increasing coaxial wire.As shown in figure 8, Fig. 8 is that the present invention is another
The schematic diagram of the impedance matching of the adjustment earphone antenna that embodiment is provided.Coaxial wire CA2 ' by three difference length be L2A,
The coaxial wire of L2B, L2C is constituted.Furthermore, because of coaxial wire CA3（Length is L3）Its effect is only coaxial wire,
Do not have matching effect, therefore which can be random length, even length is 0.
Also or, as shown in figure 9, Fig. 9 is showing for the impedance matching of the adjustment earphone antenna of another embodiment of the present invention offer
It is intended to.The coaxial wire CA2 ' of Fig. 8 though be characteristic impedanceAnd the matching antenna of length=1/4 wavelength
（Earphone SP1 adds coaxial wire CA1）For the matching element of 50 Ω, it is alternatively by the entities such as inductance, electric capacity unit on the implementation
The match circuit M1 constituted by part is replaced.
Next Figure 10 is refer to, Figure 10 is the first coaxial cable of the wireless headset that another embodiment of the present invention is provided
The schematic diagram of the annexation of line, the second coaxial wire and triaxial cable line.In the present embodiment, with file antenna
（collinear antenna）Form the first coaxial wire 13 of previous embodiment is connected at least one or more coaxial
Cable, lifts the gain of antenna.As shown in fig. 7, the first coaxial wire 13 of previous embodiment could alternatively be file
First coaxial wire 13 ' and the second coaxial wire 14 of form connection, or the first coaxial electrical of file form connection
Cable 13 ', the second coaxial wire 14 and triaxial cable line 15.First coaxial wire 13 and the first coaxial wire
13 ' is roughly the same, and its difference is only that the length of the first coaxial wire 13 and the first coaxial wire 13 ' may not phase
Together.Second coaxial wire 14 has the second inner wire 141, the second insulating barrier 142 and the second conductive shield 143.3rd is same
Shaft cable line 15 has the 3rd inner wire 151, the 3rd insulating barrier 152 and the 3rd conductive shield 153.
So-called file form connection, details are as follows.When the first coaxial wire 13 replaces with the of file form connection
When one coaxial wire 13 ' and the second coaxial wire 14, the second coaxial wire 14 is coupled to the first coaxial wire 13 '
Between second end P1 and audio frequency amplifier 122a.In more detail, the contact of the neighbouring second end P1 of the first conductive shield 133 '
RF-coupled electric capacity 123 and the second radio frequency choke coil 125 are coupled by the second inner wire 141.First inner wire 131 ' is adjacent
The contact of nearly second end P1 couples the first radio frequency choke coil 124 by the second conductive shield 133.
When the first coaxial wire 13 replaces with the first coaxial wire 13 ', second coaxial cable of file form connection
When line 14 and triaxial cable line 15, triaxial cable line 15 is coupled to the second coaxial wire 14 and audio frequency amplifier
Between 122a.In more detail, the second inner wire 141 couples the 3rd conductive shield 153, the coupling of the second conductive shield 143 the 3rd
Inner wire 151.3rd conductive shield 153 couples RF-coupled electric capacity 123 and the second radio frequency choke coil 125, the 3rd inner wire
153 the first radio frequency choke coils 124 of coupling.In terms of resistance value, the length of triaxial cable line 15 can be according to wireless headset
Product design and adjust, the length of triaxial cable line 15 has no effect on impedance matching.
(the possibility effect of embodiment)
According to embodiments of the present invention, above-mentioned antenna and its wireless headset for wireless headset, this is used for wireless headset
Antenna and its wireless headset can by coaxial wire transmit audio signal, while using coaxial wire conductive shield make
For the radiating element of antenna of transceiving radio frequency signal.In addition, a plurality of coaxial wire can be with file antenna（collinear
antenn）Form concatenation, to lift the gain of antenna.
Embodiments of the invention are the foregoing is only, which simultaneously is not used to limit to scope of the presently claimed invention.
Claims (10)
1. a kind of antenna for wireless headset, it is characterised in that the antenna for wireless headset includes：
One first coaxial wire, first coaxial wire have a first end and one second end, and the first end is used
To couple a pronunciation unit, to couple an audio frequency amplifier, first coaxial wire will be from described at second end
The audio signal of audio frequency amplifier is transferred to the pronunciation unit, and first coaxial wire includes：
One first inner wire；
One first insulating barrier, first insulating barrier surround first inner wire；And
One first conductive shield, first conductive shield surround first insulating barrier, first conductive shield it is neighbouring
The contact at second end to couple a radio circuit unit, wherein, first conductive shield is used as wireless receiving and dispatching radio frequency
The Department of Radiation of signal；
One RF-coupled electric capacity, the contact at neighbouring described second end of first conductive shield pass through the RF-coupled electric capacity
The radio circuit unit is coupled, wherein, the RF-coupled electric capacity passes through the radiofrequency signal, and stops from the sound
The audio signal of audio amplifier enters the radio circuit unit；
One first radio frequency choke coil, the audio frequency amplifier couple first inner wire by the first radio frequency choke coil
The contact at neighbouring second end；And
One second radio frequency choke coil, the audio frequency amplifier couple first conductive shield by the second radio frequency choke coil
Neighbouring described second end contact；
Wherein, the first radio frequency choke coil and the second radio frequency choke coil make the audio frequency letter of the audio frequency amplifier
Number pass through, and stop that the radiofrequency signal enters the audio frequency amplifier.
2. the antenna for wireless headset according to claim 1, it is characterised in that frequency band of the antenna in 2.4GHz
Lower operation, the length of first coaxial wire is between 6 centimetres to 8 centimetres.
3. the antenna for wireless headset according to claim 1, it is characterised in that the length of first coaxial wire
Between 0.5 times and 0.65 times of wavelength corresponding to operation frequency of the degree between the antenna.
4. the antenna for wireless headset according to claim 1, the antenna for wireless headset also include：
One second coaxial wire, second coaxial wire have one second inner wire, one second insulating barrier and one the
Two conductive shields, second coaxial wire are coupled to second end of first coaxial wire and are put with the audio frequency
Between big device, wherein, the contact at neighbouring described second end of first conductive shield is coupled by second inner wire
The RF-coupled electric capacity and the second radio frequency choke coil, the contact at neighbouring described second end of first inner wire lead to
Cross second conductive shield and couple the first radio frequency choke coil.
5. the antenna for wireless headset according to claim 4, the antenna for wireless headset also include：
One triaxial cable line, the triaxial cable line have one the 3rd inner wire, one the 3rd insulating barrier and one the
Three conductive shields, the triaxial cable line are coupled between second coaxial wire and the audio frequency amplifier, institute
State the second inner wire and couple the 3rd conductive shield, second conductive shield couples the 3rd inner wire, wherein, it is described
3rd conductive shield couples the RF-coupled electric capacity and the second radio frequency choke coil, and the 3rd inner wire coupling is described
First radio frequency choke coil.
6. a kind of wireless headset, it is characterised in that the wireless headset includes：
One control device, the control device include a radio circuit unit and an audio treatment unit, the Audio Processing
Unit has an audio frequency amplifier；
One pronunciation unit；
One first coaxial wire, first coaxial wire have a first end and one second end, the first end coupling
The pronunciation unit is connect, second end couples the audio frequency amplifier, and first coaxial wire will be from the audio frequency
The audio signal of amplifier is transferred to the pronunciation unit, and first coaxial wire includes：
One first inner wire；
One first insulating barrier, first insulating barrier surround first inner wire；
And
One first conductive shield, first conductive shield surround first insulating barrier, first conductive shield it is neighbouring
The contact at second end couples the radio circuit unit, wherein, first conductive shield is believed as wireless receiving and dispatching radio frequency
Number Department of Radiation；
One RF-coupled electric capacity, the contact at neighbouring described second end of first conductive shield pass through the RF-coupled electric capacity
The radio circuit unit is coupled, wherein, the RF-coupled electric capacity passes through the radiofrequency signal, and stops from the sound
The audio signal of audio amplifier enters the radio circuit unit；
One first radio frequency choke coil, the audio frequency amplifier couple first inner wire by the first radio frequency choke coil
The contact at neighbouring second end；And
One second radio frequency choke coil, the audio frequency amplifier couple first conductive shield by the second radio frequency choke coil
Neighbouring described second end contact；
Wherein, the first radio frequency choke coil and the second radio frequency choke coil make the audio frequency letter of the audio frequency amplifier
Number pass through, and stop that the radiofrequency signal enters the audio frequency amplifier.
7. wireless headset according to claim 6, it is characterised in that the radiation that the first conducting screen covert is formed
Portion is operated under the frequency band of 2.4GHz, and the length of first coaxial wire is between 6 centimetres to 8 centimetres.
8. wireless headset according to claim 6, it is characterised in that the length of first coaxial wire is between described
Between 0.5 times and 0.65 times of wavelength corresponding to the operation frequency of the Department of Radiation that the first conducting screen covert is formed.
9. wireless headset according to claim 6, the wireless headset also include：
One second coaxial wire, second coaxial wire have one second inner wire, one second insulating barrier and one the
Two conductive shields, second coaxial wire are coupled to second end of first coaxial wire and are put with the audio frequency
Between big device, wherein, the contact at neighbouring described second end of first conductive shield is coupled by second inner wire
The RF-coupled electric capacity and the second radio frequency choke coil, the contact at neighbouring described second end of first inner wire lead to
Cross second conductive shield and couple the first radio frequency choke coil.
10. wireless headset according to claim 9, the wireless headset also include：
One triaxial cable line, the triaxial cable line have one the 3rd inner wire, one the 3rd insulating barrier and one the
Three conductive shields, the triaxial cable line are coupled between second coaxial wire and the audio frequency amplifier, institute
State the second inner wire and couple the 3rd conductive shield, second conductive shield couples the 3rd inner wire, wherein, it is described
3rd conductive shield couples the RF-coupled electric capacity and the second radio frequency choke coil, and the 3rd inner wire coupling is described
First radio frequency choke coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310190309.7A CN104183914B (en) | 2013-05-21 | 2013-05-21 | Wireless headphone and antenna for wireless headphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310190309.7A CN104183914B (en) | 2013-05-21 | 2013-05-21 | Wireless headphone and antenna for wireless headphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104183914A CN104183914A (en) | 2014-12-03 |
| CN104183914B true CN104183914B (en) | 2017-05-10 |
Family
ID=51964784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310190309.7A Expired - Fee Related CN104183914B (en) | 2013-05-21 | 2013-05-21 | Wireless headphone and antenna for wireless headphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104183914B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449358B (en) * | 2015-11-27 | 2019-04-02 | 歌尔股份有限公司 | A kind of antenna system of bluetooth headset and a kind of bluetooth headset |
| TWI773940B (en) * | 2019-11-12 | 2022-08-11 | 美律實業股份有限公司 | Wireless earphone |
| CN114337715A (en) * | 2020-09-30 | 2022-04-12 | 南京矽力微电子(香港)有限公司 | Multi-section type common radiator antenna and wearable device using same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452531C (en) * | 2004-04-19 | 2009-01-14 | 索尼株式会社 | Earphone antenna and portable radio equipment provided with earphone antenna |
| JP4023500B2 (en) * | 2004-08-03 | 2007-12-19 | ソニー株式会社 | Earphone antenna |
| TWM447057U (en) * | 2012-08-24 | 2013-02-11 | Dexin Corp | Integrated antenna earphone device |
-
2013
- 2013-05-21 CN CN201310190309.7A patent/CN104183914B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104183914A (en) | 2014-12-03 |
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