CN115020959A - Bluetooth headset antenna, Bluetooth headset and control method thereof - Google Patents

Bluetooth headset antenna, Bluetooth headset and control method thereof Download PDF

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Publication number
CN115020959A
CN115020959A CN202210203387.5A CN202210203387A CN115020959A CN 115020959 A CN115020959 A CN 115020959A CN 202210203387 A CN202210203387 A CN 202210203387A CN 115020959 A CN115020959 A CN 115020959A
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CN
China
Prior art keywords
antenna
switch
bluetooth headset
link
frequency
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Pending
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CN202210203387.5A
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Chinese (zh)
Inventor
陈诚
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Anker Innovations Co Ltd
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Anker Innovations Co Ltd
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Priority to CN202210203387.5A priority Critical patent/CN115020959A/en
Publication of CN115020959A publication Critical patent/CN115020959A/en
Pending legal-status Critical Current

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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
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • 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
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • 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
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • 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
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups

Abstract

The invention provides a Bluetooth headset antenna, a Bluetooth headset and a control method thereof, wherein the Bluetooth headset antenna comprises an antenna and an antenna switch assembly connected with the antenna, the antenna switch assembly at least comprises a first switch link and a second switch link which are connected in parallel, the antenna height of the antenna is less than 2.5mm, the first switch link comprises a first switch and a first capacitance-resistance device which are connected in series, the second switch link comprises a second switch and a second capacitance-resistance device which are connected in series, and the antenna switch assembly receives a control signal and controls the conduction of at least one switch so as to tune the antenna into different resonance modes. The antenna switch component controls the conduction of at least one switch based on a control signal from the controller so as to tune the antenna into different resonance modes, widen the antenna frequency band and effectively improve the radiation performance of the whole frequency band.

Description

Bluetooth headset antenna, Bluetooth headset and control method thereof
Technical Field
The invention relates to the field of Bluetooth headsets, in particular to a Bluetooth headset antenna, a Bluetooth headset and a control method of the Bluetooth headset.
Background
The antenna is an important part required by various electronic devices, and for the Bluetooth headset, the Bluetooth antenna is used for transmitting voice and music data in a wireless transmitting/receiving mode, so that the appearance of the Bluetooth headset is more attractive, and the using mode is more flexible and convenient.
At present, the TWS earphone is used as an indispensable accessory of a mobile phone, and is convenient to wear, simple and easy to use compared with a wired earphone especially in sports and daily outdoor activities. Along with the increasing requirement of people on the appearance of the TWS, the miniaturization is advocated by more and more designers, the height of an antenna from a PCB main board is gradually reduced to 2mm or even 1mm from the initial 3.5mm, the challenge on the antenna design is great, the conventional design antenna with low net height has large Q value and narrow bandwidth, and cannot meet the basic performance of the antenna, wherein Q is a quality factor, the larger Q value is the narrow passband, and the smaller Q value is the wide passband.
Therefore, it is necessary to provide an ultra-thin bluetooth headset antenna with a small antenna height, a bluetooth headset and a control method thereof to solve the above problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Aiming at the defects of the prior art, the invention provides a Bluetooth headset antenna which comprises an antenna and an antenna switch assembly connected with the antenna, wherein the antenna switch assembly at least comprises a first switch link and a second switch link which are connected in parallel, the antenna height of the antenna is smaller than 2.5mm, the first switch link comprises a first switch and a first capacitance-resistance device which are connected in series, the second switch link comprises a second switch and a second capacitance-resistance device which are connected in series, and the antenna switch assembly receives a control signal and controls the conduction of at least one switch so as to tune the antenna into different resonance modes.
Optionally, the antenna switch assembly further comprises a third switch link connected in parallel with both the first switch link and the second switch link, the third switch link comprising a third switch and a third inductance-capacitance device connected in series.
Optionally, one of the first inductance-capacitance device and the second inductance-capacitance device is a first inductor, and the inductance value of the first inductor is 0-30 nH, and the first inductor is used for antenna radiation with the frequency of 2.402-2.430 GHz.
Optionally, the other of the first resistance-capacitance sensing device and the second resistance-capacitance sensing device is a first resistor, the resistance value of the first resistor is 0 Ω, and the first resistor is used for antenna radiation with the frequency of 2.431-2.450 GHz.
Optionally, the third capacitance-resistance sensing device is a first capacitor, and the capacitance value of the first capacitor is 0-10 pF, and the third capacitance-resistance sensing device is used for antenna radiation with the frequency of 2.451-2.480 GHz.
Optionally, the antenna switch assembly further comprises a fourth switch link connected in parallel with the first switch link, the second switch link, and the third switch link, the fourth switch link comprising a fourth switch and a second capacitor connected in series, the fourth switch link serving as a backup switch link.
Optionally, the antenna is an inverted F antenna or a loop antenna.
A Bluetooth headset is provided with the Bluetooth headset antenna.
A Bluetooth headset control method is used for controlling the Bluetooth headset and comprises the following steps:
the Bluetooth headset is connected with the audio equipment;
the Bluetooth headset performs frequency hopping in a pseudo-random code mode, wherein frequency ranges of frequency points corresponding to the pseudo-random codes correspond to channels one by one;
and the controller of the Bluetooth headset sends the antenna switch logic corresponding to the channel to the antenna switch assembly through the universal input/output port so as to conduct the switch corresponding to the antenna switch logic, thereby enabling the switch link corresponding to the switch to work.
Optionally, when the frequency range of the frequency point corresponding to the pseudo random code is 2.402 to 2.430GHz, the corresponding channel is CH0 to CH28, and after the first switch is turned on, the first switch link works; when the frequency range of the frequency point corresponding to the pseudo-random code is 2.431-2.450 GHz, the corresponding channel is CH 29-CH 48, and after the second switch is switched on, the second switch link works; when the frequency range of the frequency point corresponding to the pseudo-random code is 2.451-2.480 GHz, the corresponding channel is CH 49-CH 78, and after the third switch is turned on, the third switch link works.
According to the Bluetooth headset antenna, the Bluetooth headset and the control method thereof, the antenna switch assembly is introduced into the Bluetooth headset, different resonance modes of the antenna are tuned through the switch assembly, and the channel number corresponds to the switch state in an actual frequency modulation mechanism, so that the wireless performance and the user experience of the Bluetooth headset when the antenna is small in thickness can be greatly improved.
Drawings
The following drawings of the present invention are included to provide a further understanding of the invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles and apparatus of the invention. In the drawings, there is shown in the drawings,
FIG. 1 is a schematic diagram of a circuit connection between a Bluetooth headset antenna and a controller according to the present invention;
FIG. 2 is a schematic circuit diagram of a Bluetooth headset antenna having three switches in accordance with the present invention;
FIG. 3 is a schematic circuit diagram of a Bluetooth headset antenna having four switches in accordance with the present invention;
fig. 4(a) is a schematic diagram of the position of an antenna switch assembly of an inverted-F antenna (IFA) according to the present invention;
FIG. 4(b) is a schematic diagram of the antenna switch assembly position of a LOOP antenna (LOOP) according to the present invention;
fig. 5 is a return loss graph of a LOOP antenna of a bluetooth headset according to the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent that the invention may be practiced without limitation to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The invention provides a Bluetooth headset antenna, which comprises an antenna and an antenna switch assembly connected with the antenna, wherein the antenna switch assembly at least comprises a first switch link and a second switch link which are connected in parallel, the antenna height of the antenna is less than 2.5mm, for example, the antenna height is 1mm, or the antenna height is 1.5mm or 2mm, at the moment, the Bluetooth headset can be called an ultrathin Bluetooth headset, the first switch link comprises a first switch and a first capacitance-resistance sensing device which are connected in series, the second switch link comprises a second switch and a second capacitance-resistance sensing device which are connected in series, the antenna switch assembly receives a control signal and controls the conduction of at least one switch, so that the antenna is tuned into different resonance modes, the radiation performance of the whole frequency band can be effectively improved by adding the antenna switch assembly, and the antenna frequency band is widened.
In at least one embodiment, the antenna switch component may further include a third switch link connected in parallel to both the first switch link and the second switch link, where the third switch link includes a third switch and a third capacitance-resistance device connected in series, and the plurality of switches may perform fine switching, further improve radiation performance of the entire frequency band, and widen the antenna frequency band.
In at least one embodiment, one of the first inductance-capacitance device and the second inductance-capacitance device is a first inductor, and the inductance value of the first inductor is 0-30 nH, such as 1nH or 10nH, 20nH, etc., for antenna radiation with a frequency of 2.402-2.430 GHz, where the frequency range is not limiting and can be adjusted as needed.
In at least one embodiment, the other of the first resistance-capacitance sensing device or the second resistance-capacitance sensing device is a first resistor, the resistance value of the first resistor is 0 Ω, i.e. short-circuit or through-circuit, for antenna radiation with frequency of 2.431-2.450 GHz, where the frequency range is not limiting and can be adjusted as desired.
In at least one embodiment, the third capacitive-capacitive sensing device is a first capacitor having a capacitance of 0-10 pF, such as 2pF or 6pF, for antenna radiation at a frequency of 2.451-2.480 GHz, where the frequency range is not limiting and can be adjusted as desired.
In at least one embodiment, the antenna switch assembly further includes a fourth switch link connected in parallel with each of the first switch link, the second switch link, and the third switch link, the fourth switch link including a fourth switch and a second capacitor connected in series, and the fourth switch link is used as a backup switch link to further broaden the antenna band, refine the switching, or replace a failed switch link when any one of the first switch link, the second switch link, and the third switch link fails.
In at least one embodiment, the antenna is an inverted-F antenna or a loop antenna in the field of antennas.
Another aspect of the present invention further provides a bluetooth headset having the bluetooth headset antenna in any of the above embodiments.
Another aspect of the present invention further provides a bluetooth headset controlling method, configured to control a bluetooth headset in any of the above embodiments, where the method includes the following steps:
the Bluetooth headset and the audio equipment are in communication connection through Bluetooth;
the Bluetooth headset performs frequency hopping in a pseudo-random code mode, wherein frequency ranges of frequency points corresponding to the pseudo-random codes correspond to preset channels one by one;
and the controller of the Bluetooth headset sends the antenna switch logic corresponding to the channel to the antenna switch assembly through the universal input/output port so as to conduct the switch corresponding to the antenna switch logic, thereby enabling the switch link corresponding to the switch to work.
In at least one embodiment, when the frequency point corresponding to the pseudo random code is in the frequency range of 2.402 to 2.430GHz, the corresponding channel is CH0 to CH28, and after the first switch is turned on, the first switch link works; when the frequency range of the frequency point corresponding to the pseudo-random code is 2.431-2.450 GHz, the corresponding channel is CH 29-CH 48, and after the second switch is switched on, the second switch link works; when the frequency range of the frequency point corresponding to the pseudo-random code is 2.451-2.480 GHz, the corresponding channel is CH 49-CH 78, and after the third switch is turned on, the third switch link works. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a bluetooth headset antenna comprising an antenna switch assembly comprising at least three switch chains connected in parallel. Here, the number of the parallel switch links is three, which is only schematic, and two or more parallel switch links may also implement the solution of the present invention. Wherein the first switch link comprises a first switch S1 and a first inductor connected in series, the second switch link comprises a second switch S2 and a first resistor connected in series, the third switch link comprises a third switch S3 and a first capacitor connected in series, the antenna switch assembly controls conduction of at least one switch based on a control signal from the controller to tune the antenna to different resonant modes. The above specific compositions of the links are also exemplary, and in some embodiments, appropriate capacitance, inductance or resistance elements may be selected according to specific requirements to form corresponding switch links in series with the switch elements.
In one embodiment, as shown in fig. 2, a LOOP antenna is taken as an example, and the LOOP antenna is used herein as an example, which is not specifically limited by the present invention, and various bluetooth antennas currently on the market and in the future are within the scope of the present invention. The corresponding controller is a Radio Frequency (RF) port of a bluetooth System On Chip (SOC) and then connected to the RF matching circuit, and the control chip here is exemplarily selected from the bluetooth System On Chip (SOC), which is not specifically limited by the present invention. The radio frequency matching circuit is used for impedance change from an RF port to an antenna, the radio frequency matching circuit is connected to antenna feed to excite the antenna, after the antenna is wired, the antenna switch component is connected in series close to a ground end, for example, the antenna switch component between AB in fig. 2 is controlled by a GPIO port provided by SOC, the logic value of the GPIO is changed by selecting a channel, and the optimal resonance state of the antenna is matched to a traversed communication channel, so that the radiation performance of the antenna is maximized.
In one embodiment, the first inductor is 0-30 nH for antenna radiation at frequencies of 2.402-2.430 GHz. Preferably, the first inductor is 1 nH. The first resistor is 0 omega and is used for antenna radiation with the frequency of 2.431-2.450 GHz. This is equivalent to the state of the existing bluetooth headset antenna when the switch assembly is not available. The first capacitor is 0-10 pF and is used for antenna radiation with the frequency of 2.451-2.480 GHz. Preferably, the first capacitance is 6 pF.
In one embodiment, as shown in fig. 3, taking a LOOP antenna as an example, a bluetooth headset antenna comprises an antenna switch assembly including four switch chains connected in parallel, wherein a first switch chain includes a first switch S1 and a first inductor connected in series, a second switch chain includes a second switch S2 and a first resistor connected in series, a third switch chain includes a third switch S3 and a first capacitor connected in series, and a fourth switch chain includes a fourth switch S4 and a second capacitor connected in series, and is used as a backup switch chain. The second capacitance in this case may be 0 to 10pF, preferably 6 pF.
The conventional TWS design is an antenna form such as IFA or LOOP, and capacitive or inductive devices (switch S) can be loaded on the antenna trace, as shown in fig. 4(a) and 4(b), and the switch S is located near the ground. The main board is typically 5mm x 30mm and if it is desired to set the antenna height to only 1mm from the main board, the antenna bandwidth is very narrow for conventional designs without switching components.
Fig. 5 is a return loss curve of the LOOP antenna, and the solid line is a state S2 of 0 ohm, from which it can be seen that the bandwidth of the antenna cannot satisfy 2.4 to 2.48GHz due to insufficient height of the antenna, and the sidebands 2.4 to 2.42GHz and 2.47 to 2.48GHz are poor. When the frequency reaches 2.4GHz, the position of the return loss is at 1 position, and the requirement of-6 dB is not met, and when the first switch S1 is added, namely 1nH, as shown by a left-side line broken line, the position of the return loss is at 3 positions, and the design requirement is met. When the frequency reaches 2.48GHz, the return loss is located at 2, which does not meet the-6 dB requirement, for conventional designs without switching components, and at 6pF, which is after the addition of the third switch S3, the return loss is located at 5, which meets the design requirements, as shown by the dotted line. When the frequency is 2.43 to 2.45GHz, the conventional design is still adopted, namely the second switch S2 is in the working state with the resistance of 0 omega. So in current bluetooth headset's antenna design, this application can be used to establish ties to IFA or the above-mentioned antenna switch subassembly of LOOP antenna through newly-increased to can realize the tuning to the antenna different states in ultra-thin antenna structure, with promote the radiation performance of whole frequency band effectively, widen the antenna band, realize bluetooth headset's miniaturization simultaneously.
In short, after the antenna switch assembly is added, when the switch is switched to the state S3, namely 6pF, the initial resonance position is covered by 2.45-2.48 GHz and can meet the requirement of being less than-6 dB, when the switch is switched to the state S1, namely 1nH, the resonance can shift to a low level by inductive loading, and at this time, the coverage is 2.4-2.43 GHz and can also meet the requirement of being less than-6 dB. The antenna efficiency is shown in table 1.
TABLE 1 antenna efficiency comparison
frequency/GHz Original state After adding a switch component
2.4 20％ 32％
2.44 35％ 35％
2.48 18％ 30％
The bluetooth headset provided by the present application is provided with the bluetooth headset antenna in any of the above embodiments, and is provided with other conventional components in the existing bluetooth headset to implement various functions that can be supported by the existing bluetooth headset, and the like, which are not described herein again.
In addition, the control method of any bluetooth headset provided by the application can be used for controlling the bluetooth headset in any embodiment. Wherein, audio equipment can be for intelligent wearing equipment such as cell-phone, computer, intelligent pad, wrist-watch, bracelet.
As one example shown in table 2 below, the antenna switch component may be set according to specific parameter values in table 2, so that the antenna switch corresponding to the antenna switch logic is turned on, and thus the corresponding switch link works, and the wireless performance of the bluetooth headset is improved. When the frequency is 2.402-2.430 GHz, the channels corresponding to one are CH 0-CH 28, corresponding to the first same switch logic 00, the first switch is turned on, and the first switch link works; when the frequency is 2.431-2.450 GHz, the channels which correspond to one another are CH 29-CH 48 and correspond to the second same switch logic 01, the second switch is turned on, and the second switch link works; when the frequency is 2.451-2.480 GHz, the channels corresponding to each other are CH 49-CH 78, the third switch is turned on corresponding to the third same switch logic 11, and the third switch link works.
TABLE 2 correspondence of switches to different channels
Figure BDA0003530473360000081
The bluetooth headset in this application can be TWS earphone, and the antenna height tends to ultra-thin, and preferred setting is 1mm, and such earphone can be called ultra-thin bluetooth headset, can promote the radiation performance of whole frequency band effectively through increasing the antenna switch subassembly, and the switch can accomplish one to more in quantity, and a plurality of switches can be done and become more meticulous and switch, can promote bluetooth headset's wireless performance and user experience by a wide margin.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or to one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The Bluetooth headset antenna is characterized by comprising an antenna and an antenna switch assembly connected with the antenna, wherein the antenna switch assembly at least comprises a first switch link and a second switch link which are connected in parallel, the antenna height of the antenna is smaller than 2.5mm, the first switch link comprises a first switch and a first capacitance-resistance device which are connected in series, the second switch link comprises a second switch and a second capacitance-resistance device which are connected in series, and the antenna switch assembly receives a control signal and controls the conduction of at least one switch so as to tune the antenna into different resonant modes.
2. The bluetooth headset antenna of claim 1, wherein the antenna switch assembly further comprises a third switch link in parallel with both the first switch link and the second switch link, the third switch link comprising a third switch and a third capacitive-inductive device connected in series.
3. The Bluetooth headset antenna of claim 1 or 2, wherein one of the first and second inductance-capacitance devices is a first inductor having an inductance value of 0-30 nH for antenna radiation at a frequency of 2.402-2.430 GHz.
4. The Bluetooth headset antenna of claim 3, wherein the other of the first resistance-capacitance sensing device or the second resistance-capacitance sensing device is a first resistor having a resistance value of 0 Ω for antenna radiation at a frequency of 2.431-2.450 GHz.
5. The Bluetooth headset antenna of claim 4, wherein the third capacitive sensing device is a first capacitor having a capacitance of 0-10 pF for antenna radiation at a frequency of 2.451-2.480 GHz.
6. The bluetooth headset antenna of claim 2, wherein the antenna switch assembly further comprises a fourth switch link in parallel with the first, second, and third switch links, the fourth switch link comprising a fourth switch and a second capacitor connected in series, the fourth switch link serving as a backup switch link.
7. The bluetooth headset antenna of claim 1, wherein the antenna is an inverted-F antenna or a loop antenna.
8. A Bluetooth headset characterized by having a Bluetooth headset antenna according to any of claims 1-7.
9. A bluetooth headset control method for controlling the bluetooth headset of claim 8, the method comprising the steps of:
the Bluetooth headset is connected with audio equipment;
the Bluetooth headset performs frequency hopping in a pseudo-random code mode, wherein frequency ranges of frequency points corresponding to the pseudo-random codes correspond to channels one by one;
and the controller of the Bluetooth headset sends the antenna switch logic corresponding to the channel to an antenna switch component through a general input/output port so as to conduct the switch corresponding to the antenna switch logic, thereby enabling the switch link corresponding to the switch to work.
10. The method of claim 9, wherein when the frequency point corresponding to the pseudo random code is in the frequency range of 2.402 to 2.430GHz, the corresponding channel is CH0 to CH28, and after the first switch is turned on, the first switch link is operated; and when the frequency point corresponding to the pseudo-random code is in the frequency range of 2.431-2.450 GHz, the corresponding channel is CH 29-CH 48, and after the second switch is switched on, the second switch link works.
CN202210203387.5A 2022-03-03 2022-03-03 Bluetooth headset antenna, Bluetooth headset and control method thereof Pending CN115020959A (en)

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Application Number Priority Date Filing Date Title
CN202210203387.5A CN115020959A (en) 2022-03-03 2022-03-03 Bluetooth headset antenna, Bluetooth headset and control method thereof

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CN115020959A true CN115020959A (en) 2022-09-06

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