CN112510351B - Antenna device for wireless earphone and wireless earphone - Google Patents
Antenna device for wireless earphone and wireless earphone Download PDFInfo
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- CN112510351B CN112510351B CN202011061969.1A CN202011061969A CN112510351B CN 112510351 B CN112510351 B CN 112510351B CN 202011061969 A CN202011061969 A CN 202011061969A CN 112510351 B CN112510351 B CN 112510351B
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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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- 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
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- 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
- H04R1/1016—Earpieces of the intra-aural type
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- 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
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- 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 an antenna device for a wireless earphone and the wireless earphone, wherein the antenna device comprises a first resonant antenna and a second resonant antenna, the first resonant antenna comprises a radiation unit connected with a main board in the wireless earphone, the second resonant antenna comprises a non-closed cavity and a slot structure which are formed by surrounding a rod metal shell of the wireless earphone, the first resonant antenna is an energy radiation source of the antenna device, and the first resonant antenna excites the second resonant antenna to generate radiation energy. According to the antenna device for the wireless earphone and the wireless earphone, the slot antenna is constructed by the exciting antenna and the rod metal cavity, so that the slot antenna can be realized in the wireless earphone.
Description
Technical Field
The invention relates to the technical field of earphones, in particular to an antenna device for a wireless earphone and the wireless earphone.
Background
With the rapid development of the earphone industry, wireless earphones are widely used. For the current wireless earphone equipment, the all-metal shell has the advantages of attractive appearance, high structural strength, excellent heat-conducting property and the like. The wireless headset device generally performs electromagnetic signal transmission through the antenna device, however, the antenna device is easily shielded and interfered by the metal housing during signal receiving and transmitting, and thus it is difficult for the existing wireless headset to implement an antenna design under a metal appearance.
In particular, the metal shield absorbs and reflects signals that affect antenna performance and directivity. For a conventional antenna design, the rigid requirement and the height requirement on clearance are difficult to realize the antenna design under the appearance of all metal or most of metal; the conventional slot antenna also has the requirement of clearance and large ground plane, so that the antenna design under the product with a metal appearance is difficult to realize.
Disclosure of Invention
The present invention has been made to solve at least one of the above problems. According to an aspect of the present invention, there is provided an antenna device for a wireless headset, the antenna device including a first resonant antenna and a second resonant antenna, wherein the first resonant antenna includes a radiating element connected to a main board in the wireless headset, the second resonant antenna includes a non-closed cavity and a slot structure surrounded by a rod metal housing of the wireless headset, the first resonant antenna is an energy radiation source of the antenna device, and the first resonant antenna excites the second resonant antenna to generate radiation energy.
In one embodiment of the present invention, the slot structure is a U-shaped slot structure, and the radiation unit is a radiation unit of a U-shaped structure.
In one embodiment of the invention, the U-shaped slot structure is located at the end of the stem portion.
In one embodiment of the invention, the slot structure is an I-type slot structure.
In an embodiment of the present invention, the housing of the wireless headset is made of metal, the antenna apparatus further includes a third resonant antenna, the third resonant antenna includes the housing of the wireless headset, and the radiated energy generated by the first resonant antenna and the second resonant antenna is excited by the first resonant antenna and is mirrored to the housing to form the third resonant antenna.
In one embodiment of the present invention, when the resonance arm length of the third resonance antenna is greater than or equal to the resonance arm length of the second resonance antenna, the respective resonance frequencies of the third resonance antenna and the second resonance antenna are the same.
In one embodiment of the present invention, when the resonating arm length of the third resonating antenna is shorter than the resonating arm length of the second resonating antenna, the respective resonating frequencies of the third resonating antenna and the second resonating antenna are different.
In one embodiment of the present invention, the third resonant antenna has an approximately irregular spherical shape.
In one embodiment of the invention, the third resonant antenna and the second resonant antenna form a set of dual pair dipole array antennas.
According to another aspect of the present invention, a wireless headset is provided, where a main board, a battery, a speaker assembly, and a microphone assembly are accommodated inside a housing of the wireless headset, the wireless headset includes an antenna device, and the antenna device includes a first resonant antenna and a second resonant antenna, where the first resonant antenna includes a radiating element connected to the main board, the second resonant antenna includes a non-closed cavity and a slot structure surrounded by a rod metal housing of the wireless headset, the first resonant antenna is an energy radiation source of the antenna device, and the first resonant antenna excites the second resonant antenna to generate radiation energy.
According to the antenna device for the wireless earphone and the wireless earphone, the slot antenna is constructed by the exciting antenna and the rod metal cavity, so that the slot antenna can be realized in the wireless earphone.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 shows an exemplary structural diagram of an antenna device for a wireless headset according to one embodiment of the present invention.
Fig. 2 shows a schematic view of a first resonator antenna of an antenna arrangement for a wireless headset according to an embodiment of the invention.
Fig. 3 shows a schematic view of a bottom slot of an antenna arrangement for a wireless headset according to an embodiment of the invention.
Fig. 4 shows an equivalent diagram of an antenna system of an antenna device for a wireless headset according to an embodiment of the present invention.
Fig. 5 illustrates an antenna system standing wave pattern of an antenna apparatus for a wireless headset according to an embodiment of the present invention.
Fig. 6 illustrates an antenna system magnetic field diagram of an antenna apparatus for a wireless headset according to one embodiment of the present invention.
Fig. 7 shows a top view of the magnetic field of an antenna system of an antenna arrangement for a wireless headset according to an embodiment of the invention.
Fig. 8 shows a magnetic field side view of an antenna system of an antenna arrangement for a wireless headset according to an embodiment of the invention.
Fig. 9 illustrates an antenna system electric field diagram of an antenna apparatus for a wireless headset according to an embodiment of the present invention.
Fig. 10 shows a complete radiation far field diagram of an antenna device for a wireless headset according to an embodiment of the present invention.
Fig. 11 shows a side view of an exemplary structural schematic of an antenna arrangement for a wireless headset according to another embodiment of the invention.
Fig. 12 is a top view illustrating an exemplary structural diagram of an antenna device for a wireless headset according to still another embodiment of the present invention.
Fig. 13 illustrates a bottom view of an exemplary structural schematic diagram of an antenna apparatus for a wireless headset according to still another embodiment of the present invention.
Fig. 14 shows a cross-sectional view of an exemplary structural schematic of a wireless headset according to one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the invention and not all embodiments of the invention, with the understanding that the invention is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention described herein without inventive step, shall fall within the scope of protection of the invention.
As described above, the conventional antenna technology (such as bluetooth antenna technology) of the wireless headset uses a conventional independent antenna as a radiation antenna, which has poor radiation efficiency, large absorption in human head space, high requirements for clearance and height due to metal shielding, and metal appearance, and thus cannot achieve metal appearance. The conventional metal slot antenna requires clearance below the slot antenna, requires that a ground plane for constructing the antenna is close to infinity, simultaneously, a feed point and a short-circuit point are respectively arranged at two sides of the tail end of the slot, a straight line is basically ensured as a circuit of the slot antenna, the width of the slot has certain requirements, the length of the slot is longer than 1/2 wavelength, the bandwidth of a slot standing wave is narrow, the slot standing wave cannot be made into a broadband antenna, the anti-interference performance of the Bluetooth antenna is poor, and the design limiting conditions are too many, so that the design of the Bluetooth antenna in an earphone structure is almost difficult to realize.
Based on this, the invention provides a design method which is applied in an earphone structure to skillfully construct a complex antenna system, essentially improves the antenna performance again and can realize the antenna design method of most metal or even all metal, so that the antenna design method can effectively transmit and receive wireless signals (such as bluetooth signals) under the condition that the shell of the antenna is partially metal or all metal. The following detailed description refers to the accompanying drawings.
Fig. 1 shows an exemplary structural diagram of an antenna device 100 for a wireless headset according to one embodiment of the present invention. As shown in fig. 1, an antenna device 100 for a wireless headset includes a first resonant antenna 110 and a second resonant antenna 120, where the first resonant antenna 110 includes a radiating element connected to a main board in the wireless headset, the second resonant antenna 120 includes a non-closed cavity and a slot structure surrounded by a metal housing of a rod portion of the wireless headset, the first resonant antenna 110 is an energy radiation source of the antenna device 100, and the first resonant antenna 110 excites the second resonant antenna 120 to generate radiation energy.
In an embodiment of the present invention, the first resonant antenna 110 includes a radiating element such as a U-shaped excitation body, as shown in fig. 2, which is connected with a rod metal housing of the wireless headset; the second resonant antenna 120 is located at the opening of the slot structure, and the rod metal shell surrounds to form a non-closed cavity, and at least one gap such as a U-shape is formed between the rod metal shells. In general, the second resonant antenna 120 is a non-closed cavity, including the metal four sides and bottom of the rod of the wireless headset, and at least one of them has a structure such as a U-shaped slotted slot as viewed from the whole of the wireless headset. In the embodiment of the present invention, the metal rod of the second resonant antenna 120 may be a rectangular parallelepiped, the slot structure may be a U-shaped slot structure, and the radiation element included in the first resonant antenna 110 may be a radiation element of a U-shaped structure. In this document, the slit structure is mainly described as a U-shaped slit structure. However, it should be understood that in other embodiments, they may be other shapes as well, as will be described further below.
In an embodiment of the present invention, the first resonant antenna 110 is a starting point of radiation energy of the antenna device 100. The second resonant antenna 120 is a first resonant antenna energy excited by coupling, and after the second resonant antenna encounters the U-shaped slot exit after oscillating repeatedly in the rod-shaped metal cavity, a second resonant frequency based on the slot length and the slot mode, which is unique and different from the first resonant frequency, and based on the slot length and the shape mode, where the second resonant frequency is similar to a form of a folded dual antenna, and can also be understood as a half-open slot antenna, assuming a calculation mode that sets a resonant point in the latter mode, a resonant point of the second resonant antenna 120 is a resonant frequency whose arm length L1+ L2+ L3/2 is a quarter of a bluetooth wavelength, where L1 is a transverse slot length, L2 is a longitudinal slot length, and L3 is a length of a bottom slot connecting two left and right dual L-shaped slots, as shown in fig. 1 and 3.
In general, in the embodiment of the present invention, the first resonant antenna 110 performs an antenna excitation function, and electromagnetic waves generated by the antenna excitation function are radiated into the cavity of the metal rod housing of the wireless headset (i.e., the non-closed cavity included in the second resonant antenna 120), and after the electromagnetic waves oscillate, a part of electromagnetic energy is radiated outwards through the slot (i.e., the slot structure included in the second resonant antenna 120), wherein a part of the electromagnetic energy is electromagnetically transformed at the slot, and a high-frequency current change with electric characteristics flowing around the slot is established at the slot due to the difference between the metal and the slot medium, which is the root cause of the generation of the slot antenna, i.e., the second resonant antenna 120. Wherein different slot excitation and slot position shapes may result in different slot antennas and differences in resonant wavelength. Based on this, the antenna device 100 for a wireless headset according to the embodiment of the present invention skillfully uses the excitation antenna and the cavity to construct a slot antenna, so that the slot antenna can be implemented in the wireless headset, and the technical problem that the conventional slot antenna cannot be implemented due to a narrow space of the conventional wireless headset is solved.
In a further embodiment of the present invention, when the other housing parts of the wireless headset except the rod metal housing are also metal housings, that is, the wireless headset is an all-metal housing, the antenna device 100 may further include a third resonant antenna 130, as shown in fig. 1, where the third resonant antenna 130 includes an all-metal housing of the wireless headset, and the radiation energy generated by the second resonant antenna 120 excited by the third resonant antenna 130 is mirrored to the all-metal housing to form the third resonant antenna 130. In this embodiment, an all metal housing for a wireless headset may be implemented.
In an embodiment of the present invention, third resonant antenna 130 comprises the metal housing head of the wireless headset and the appearance structure metal piece of the stem surface, i.e. the integral metal appearance. That is, the third resonant antenna 130 includes all of the metal housing of the wireless headset, wherein the metal housing may include an upper case, a lower case, and an internal device such as an internal motherboard battery, all of which are made of metal. Specifically, the third resonant antenna 130 is a non-closed cavity, and includes an upper metal shell, a lower metal shell, and a non-closed cavity surrounded by a part of the main board battery inside the upper metal shell and the lower metal shell. In one embodiment of the present invention, the third resonant antenna 130 may be approximately irregular spherical in shape. This is merely exemplary and in other embodiments, the third resonant antenna 130 may be other shapes.
In the embodiment of the present invention, the resonant frequencies of third resonant antenna 130 and second resonant antenna 120 may be the same or different. Specifically, when the arm length of third resonant antenna 130 is greater than or equal to the arm length of second resonant antenna 120, the respective resonant frequencies of third resonant antenna 130 and second resonant antenna 120 are the same; when the resonating arm length of third resonating antenna 130 is shorter than the resonating arm length of second resonating antenna 120, the respective resonating frequencies of third resonating antenna 130 and second resonating antenna 120 are different. Wherein the resonant frequencies of third resonant antenna 130 and second resonant antenna 120 are the same, which is indicative of enhanced co-frequency antenna performance and bandwidth. When the equivalent arm length of the metal on the surface of the third resonant antenna 130 is slightly greater than or equal to the arm length L1+ L2+ L3/2 of the second resonant antenna (as shown in fig. 1 and 3, L1 is the length of the transverse slot, L2 is the length of the longitudinal slot, and L3 is the length of a bottom slot connecting the left and right paired-matrix L-shaped slots), the two resonant frequency radiation resonant points are unified into a frequency; the third resonant frequency radiation resonance point of the third resonant antenna 130 shows its own surface metal equivalent arm length resonance when its own surface metal equivalent arm length is smaller than the arm length L1+ L2+ L3/2 of the second resonant antenna or when its shape is subjected to a discontinuous edge change, the equivalent arm length is a quarter wavelength of the third resonant frequency, and the above two cases are simultaneously influenced by a certain dielectric constant of the metal used for the metal housing.
The operation principle of the antenna device 100 for a wireless headset according to the above-described embodiment of the present invention will now be described with reference to fig. 4 to 10. Wherein, fig. 4 shows an equivalent diagram of an antenna system of an antenna device for a wireless headset according to an embodiment of the present invention; fig. 5 shows a standing wave diagram of an antenna system of an antenna arrangement for a wireless headset according to an embodiment of the invention; fig. 6 illustrates an antenna system magnetic field diagram of an antenna apparatus for a wireless headset according to one embodiment of the present invention; fig. 7 shows a top view of the antenna system magnetic field of an antenna arrangement for a wireless headset according to an embodiment of the invention; fig. 8 shows a side view of the antenna system magnetic field of an antenna arrangement for a wireless headset according to an embodiment of the invention; fig. 9 illustrates an antenna system electric field diagram of an antenna apparatus for a wireless headset according to an embodiment of the present invention; fig. 10 shows a complete radiation far field pattern of an antenna device for a wireless headset according to an embodiment of the present invention.
As shown in fig. 4 to 5, firstly, the rf signal is fed to the U-shaped radiator, i.e. the first resonant antenna 110, through the feeding network, to generate a first resonant frequency signal in the spatial energy radiation, because the radiation energy repeatedly oscillates in the rod-shaped metal cavity, and there is only one energy field radiation exit for the oscillation signal at the slot of the second resonant antenna 120, at this time, the energy of the first resonant frequency signal generates a change in current formed by different media with different dielectric constants at the slot to walk around the edge of the slot, resulting in the energy of the first resonant frequency being converted into an energy reference for radiation of the second resonant frequency, where the conversion of the resonant frequency is also completed based on an energy conversion mode, where the conversion of the resonant frequency refers to an electrical length of current walking at the boundary of two different media, and can be regarded as the same formation of current principle of a folded dipole antenna, or can be formed by current of a slotted antenna, which will be described later herein.
The excited second resonant U-shaped slot is mainly a change in the electric field and magnetic field around the U-shaped slot caused by a change in the electric field and magnetic field at the U-shaped radiator as seen from the slot antenna from the U-shaped radiator to the second radiating resonance, as shown in fig. 6 to 9. As mentioned above, the radiating bodies and the slots may not be U-shaped, but the mutual association of the electromagnetic field transformation is essentially not left, and the relationship can be generally regarded as a radiating body, and the slot antenna exciting two slot-shaped slots simultaneously conforms to the theoretical law of change on the excitation slot antenna.
In the embodiment of the present invention, the third resonant frequency is formed by the radiation energy of the second resonance, and because the metal generating the third resonant forms the extension of the physical metal surface under the effect of the internal cavity, the energy mirror image forms the third resonant frequency antenna because the second resonant antenna 120 radiates on the metal body of the third resonant carrier, and the frequency point of the third resonant frequency is mainly the mirror image of the resonance point of the second resonant and is also the same frequency, and also includes some other resonances which are caused by the structure of the secondary and special design shapes and result in the current change transformation, wherein the complete mirror image antenna in this case is also the original one, and it is expected that the resonance of the mirror image antenna is the same as that of the original antenna and is mutually enhanced, and the antenna can be combined in an array.
The second radiation resonance causes part of it to radiate in the mirror image of the metal in the rod part, in addition to the slot radiation caused by the U-shaped slot, which makes full use of the benefit of the metal cavity.
In general, the third and second radiation resonances reinforce and assist each other, and as shown in fig. 10, it can be considered that the radiation-forming system is simplified to a group of binary-pair dipole array antennas.
In further embodiments of the invention, the slot structure comprised by the second resonator antenna in the antenna arrangement for a wireless headset may also be of other shapes or structures, as described hereinbefore. Described below with reference to fig. 11 to 13.
As shown in fig. 11, the second resonant antenna 120 in the antenna device for a wireless headset according to the embodiment of the present invention may include a slot structure that is an I-shaped structure, i.e., a structure with a slot in the middle, and forms an I-shaped strip antenna instead of a U-shaped antenna. In this example, the benefit of the intermediate slot is that the slot itself can be made simpler and the antenna slot radiates away from the human head. In this example, the antenna system may be constructed using a first resonant frequency as a radiating body, where the first resonant antenna is shaped as an I-band antenna with cross orthogonal slots instead of a U-shaped antenna.
As shown in fig. 12 to 13, in the antenna device for a wireless headset according to the embodiment of the present invention, the slot structure included in the second resonant antenna 120 may be formed at the end of the rod, for example, a U-shaped slot is formed at the end of the rod. The U-shaped gap is opened at the tail part, and the advantages are that: the structure is attractive, the phase difference between the second antenna resonance and the third antenna resonance is 180 degrees, the design is a self-contained circular polarization or ellipse plan, and a power divider with 90-degree one-input-two-output phase difference is not required to be added at the circuit end. Meanwhile, in the feed network, if a power divider network designed by using a quarter wavelength difference in microstrip line length or other power dividers is used to output two paths of output phase difference signals with a phase difference of 180, the U-shaped radiator is divided into two independent parts, and then the U-shaped slot is divided into two parts, so that the second radiation resonance is an antenna with circular polarization or elliptical planned polarization, which is the content that can be achieved by the antenna device provided by the invention.
Generally, the antenna device for the wireless earphone according to the embodiment of the invention is arranged in the metal shell of the earphone, and the radiation excitation slot radiates through the radiation body, and the special application is that under the metal structure of the earphone, the antenna device is combined together to form an antenna radiation system based on the radiation principle, the coupling excitation principle, the excitation slot radiation principle, the mirror image principle and the array principle.
Based on the above description, the antenna device for a wireless headset according to the embodiment of the present invention constructs a slot antenna by the excitation antenna and the rod metal cavity, so that the slot antenna can be implemented in the wireless headset, and at least a part of the metal appearance of the wireless headset can be implemented. In addition, according to the antenna device for the wireless earphone provided by the embodiment of the invention, the mutually enhanced and mutually assisted array antennas are formed by different parts of the non-closed cavity formed by the metal shell of the wireless earphone, so that the antenna device can effectively transmit and receive wireless signals under the condition that the shell is made of all metal, the antenna design of the wireless earphone under the appearance of all metal or most metal is realized, the radiation efficiency and the performance exceed those of a conventional antenna, the gain of a free space is high, the directivity is good, the structural strength is enhanced, and the antenna design space is reduced.
The antenna device for a wireless headset according to an embodiment of the present invention is exemplarily described above. A wireless headset according to another aspect of the present invention, which may include the antenna apparatus for a wireless headset as described above, is described below with reference to fig. 14.
Fig. 14 shows a cross-sectional view of an exemplary structural schematic of the wireless headset 10 according to one embodiment of the present invention. As shown in fig. 14, a main board 140, a battery 150, a speaker assembly 160, and a microphone assembly 170 are accommodated inside a housing of the wireless headset 10, at least a rod of the housing of the wireless headset 10 is a metal housing, the wireless headset 10 includes an antenna device, the antenna device includes a first resonant antenna 110 and a second resonant antenna 120, wherein the first resonant antenna 110 includes a radiating element connected to the main board 140, the second resonant antenna 120 includes a non-closed cavity and a slot structure surrounded by the metal housing of the rod of the wireless headset, the first resonant antenna 110 is an energy source of the antenna device 100, and the first resonant antenna 110 excites the second resonant antenna 120 to generate radiation energy.
In an embodiment of the present invention, the first resonant antenna 110 comprises a radiating element such as a U-shaped excitation body, which is connected to the metal housing of the stem of the wireless headset 10, as described above in connection with fig. 2; the second resonant antenna 120 is located at the opening of the slot structure, and the rod metal shell surrounds to form a non-closed cavity, and at least one gap such as a U-shape is formed between the rod metal shells. In general, the second resonant antenna 120 is a non-closed cavity, and includes four sides and a bottom of the metal rod of the wireless headset 10 (e.g., the inner surface 120 (1) of the upper shell of the metal rod and the inner surface 120 (2) of the bottom of the inner shell of the metal rod as shown in fig. 14), and at least one of them has a structure such as a U-shaped slotted slot as viewed from the whole of the wireless headset 10. In the embodiment of the present invention, the metal rod of the second resonant antenna 120 may be a rectangular parallelepiped, the slot structure may be a U-shaped slot structure, and the radiation element included in the first resonant antenna 110 may be a radiation element of a U-shaped structure. In this document, the slit structure is mainly described as a U-shaped slit structure. However, it should be understood that they may be other shapes in other embodiments.
For example, as described above with reference to fig. 11, the slot structure included in the second resonant antenna 120 may also be an I-type structure, i.e., a structure with a slot in the middle, to form an I-type strip antenna, instead of a U-type antenna. In this example, the benefit of the intermediate slot is that the slot itself can be made simpler and the antenna slot radiates away from the human head. In this example, the antenna system may be constructed using a first resonant frequency as a radiating body, where the first resonant antenna is shaped as an I-band antenna with cross orthogonal slots instead of a U-shaped antenna.
As another example, as described above with reference to fig. 12 and 13, the slot structure included in the second resonant antenna 120 may be formed at the end of the rod, for example, a U-shaped slot is formed at the end of the rod. The U-shaped gap is opened at the tail part, and the advantages are that: the structure is attractive, the phase difference between the second antenna resonance and the third antenna resonance is 180 degrees, the design is a self-contained circular polarization or ellipse plan, and a power divider with 90-degree one-input-two-output phase difference is not required to be added at the circuit end. Meanwhile, in the above-mentioned feed network, if a power divider network designed by using a quarter wavelength difference in microstrip length or other power dividers is used to realize output of two paths of output phase difference signals with a phase difference of 180, the U-shaped radiator is divided into two independent parts, and then the U-shaped slot is also divided into two parts, so that the second radiation resonance is an antenna with circularly polarized or elliptically planned polarization properties, which is also the content that can be realized by the antenna design of the wireless earphone 10 provided by the present invention.
In an embodiment of the present invention, the first resonant antenna 110 is a starting point of radiation energy of the antenna device of the wireless headset 10. The second resonant antenna 120 is a first resonant antenna energy excited by coupling, and after the second resonant antenna encounters the U-shaped slot exit after repeated oscillation in the rod-shaped metal cavity, the second resonant frequency based on the slot length and the slot mode, which is unique and different from the first resonant frequency, and based on the slot length and the shape mode, where the second resonant frequency is similar to a form of a folded dual antenna, and can also be understood as a half-open slot antenna, assuming a calculation mode that sets a resonant point in the latter mode, a resonant point of the second resonant antenna 120 is a resonant frequency with an arm length L1+ L2+ L3/2 of a quarter bluetooth wavelength, where L1 is a transverse slot length, L2 is a longitudinal slot length, and L3 is a length of a bottom slot connecting two left and right dual-array L-shaped slots, as shown in fig. 1 and fig. 3.
In general, in the embodiment of the present invention, the first resonant antenna 110 performs an antenna excitation function, and the electromagnetic wave generated by the antenna excitation function is radiated into the cavity of the metal rod housing of the wireless headset 10 (i.e., the non-closed cavity included in the second resonant antenna 120), and after the electromagnetic wave oscillates, a part of the electromagnetic energy is radiated outwards through the slot (i.e., the slot structure included in the second resonant antenna 120), wherein a part of the electromagnetic energy is electromagnetically transformed at the slot, and a high-frequency current variation having an electrical characteristic flowing around the slot is created at the slot due to the difference between the metal and the slot medium, which is the fundamental reason for generating the slot antenna, i.e., the second resonant antenna 120. Wherein different slot excitation and slot position shapes may result in different slot antennas and differences in resonant wavelength. Based on this, the wireless earphone 10 according to the embodiment of the present invention skillfully uses the excitation antenna and the cavity to construct the slot antenna, so that the slot antenna can be implemented in the wireless earphone, and the technical problem that the conventional slot antenna cannot be implemented due to the narrow space of the wireless earphone is solved.
In a further embodiment of the present invention, when the other housing parts of the wireless headset 10 except the rod metal housing are also metal housings, that is, the wireless headset 10 is an all-metal housing, the antenna device of the wireless headset 10 may further include a third resonant antenna 130, where the third resonant antenna 130 includes the all-metal housing of the wireless headset 10, and the radiation energy generated by the second resonant antenna 120 excited by the third resonant antenna 130 is mirrored to the all-metal housing to form the third resonant antenna 130. In this embodiment, an all metal housing of the wireless headset 10 may be implemented.
In an embodiment of the present invention, the third resonant antenna 130 comprises the exterior structural metal pieces of the metal housing head and stem surfaces of the wireless headset 10, i.e., an integral metal appearance. That is, the third resonant antenna 130 includes all of the metal housing of the wireless headset 10, wherein the metal housing may include an upper case, a lower case, and an assembly of internal devices such as the internal main board 140, the battery 150, and the like. Specifically, the third resonant antenna 130 is a non-closed cavity, and includes an upper metal shell, a lower metal shell, and a non-closed cavity surrounded by internal portions of the upper metal shell, the lower metal shell, the main board 140, the battery 150, and the like. In one embodiment of the present invention, the third resonant antenna 130 may be approximately irregular spherical in shape. This is merely exemplary, and in other embodiments, the third resonant antenna 130 may be other shapes.
In the embodiment of the present invention, the resonant frequencies of third resonant antenna 130 and second resonant antenna 120 may be the same or different. Specifically, when the arm length of third resonant antenna 130 is greater than or equal to the arm length of second resonant antenna 120, the respective resonant frequencies of third resonant antenna 130 and second resonant antenna 120 are the same; when the resonating arm length of third resonating antenna 130 is shorter than the resonating arm length of second resonating antenna 120, the respective resonating frequencies of third resonating antenna 130 and second resonating antenna 120 are different. Wherein the resonant frequencies of third resonant antenna 130 and second resonant antenna 120 are the same and appear to enhance co-frequency antenna performance and bandwidth. When the equivalent arm length of the metal on the surface of the third resonant antenna 130 is slightly greater than or equal to the arm length L1+ L2+ L3/2 (as shown in fig. 1 and 2, L1 is the length of the transverse slot, L2 is the length of the longitudinal slot, and L3 is the length of a bottom slot connecting the left and right paired L-shaped slots), the third resonant frequency radiation resonant point of the third resonant antenna 130 and the second resonant antenna are unified into a frequency; the third resonant frequency radiation resonance point of the third resonant antenna 130 shows its own surface metal equivalent arm length resonance when its own surface metal equivalent arm length is smaller than the arm length L1+ L2+ L3/2 of the second resonant antenna or when its shape is subjected to a discontinuous edge change, the equivalent arm length is a quarter wavelength of the third resonant frequency, and the above two cases are simultaneously influenced by a certain dielectric constant of the metal used for the metal housing.
The working principle of the antenna device of the wireless headset 10 according to an embodiment of the present invention may be as follows: as shown in fig. 4 to fig. 5, firstly, the rf signal is fed to the U-shaped radiator, that is, the first resonant antenna 110, through the feeding network, to generate a first resonant frequency signal to radiate in space energy, because the radiated energy repeatedly oscillates in the rod-shaped metal cavity, and only one energy field radiation exit is provided for the oscillating signal at the slot of the second resonant antenna 120, at this time, the energy of the first resonant frequency signal generates a change in current formed by different media with different dielectric constants at the slot to walk around the edge of the slot, resulting in a conversion of the energy of the first resonant frequency into an energy reference for radiation of the second resonant frequency, where the conversion of the resonant frequency is also completed based on an energy conversion manner, where the conversion manner refers to an electrical length of the current walking at the boundary of two different media, and may be regarded as a formation of the same current principle of a folded-pair antenna, or may be regarded as a formation of the current of a slotted slot antenna, which will be described later herein.
The excited second resonant U-shaped slot is mainly a change in the magnetic field of the electric field around the U-shaped slot, as seen from the U-shaped radiator to the slot antenna of the second radiating resonance, caused by a change in the magnetic field of the electric field at the U-shaped radiator, as described above in connection with fig. 6 to 9. As mentioned above, the radiating body and the slot may not be U-shaped, but essentially the relationship between them can be regarded as a radiating body, and the slot antenna with two slot-shaped slots excited at the same time is in accordance with the change rule on the theoretical excitation slot antenna.
In an embodiment of the present invention, the third resonant frequency is formed by the radiation energy of the second resonance, and because the metal generating the third resonance forms an extension of the physical metal surface under the action of the internal cavity, the energy mirror image forms the third resonant frequency antenna because the second resonant antenna 120 radiates on the metal body of the third resonant carrier, and the frequency point of the third resonant frequency is mainly the same frequency as the second resonant antenna due to the mirror image of the resonant point, and also includes other resonances that are caused by the structures of the secondary and special design shapes to change the current, wherein in this case, the complete mirror antenna is also the original one, and it is desirable that the mirror antenna and the original antenna resonate identically and mutually enhance, and an array antenna can be combined.
The second radiation resonance causes part of it to radiate in the mirror image of the metal in the rod part, in addition to the slot radiation caused by the U-shaped slot, which makes full use of the benefit of the metal cavity.
In general, the third and second radiating resonances, which are added and assisted by each other, can be considered as a systematic simplification of the final radiating system into a set of dipole array antennas from the whole system, as shown in fig. 10.
Generally, the wireless earphone according to the embodiment of the invention is arranged in the metal shell of the earphone, and the radiation of the excitation slot is radiated through the radiation body, and the special use is that the wireless earphone is combined together to form an antenna radiation system based on the radiation principle, the coupling excitation principle, the excitation slot radiation principle, the mirror image principle and the array principle under the metal structure of the earphone.
Based on the above description, the wireless headset according to the embodiment of the present invention constructs the slot antenna by the excitation antenna and the rod metal cavity, so that the slot antenna can be implemented in the wireless headset, and at least a part of the metal appearance of the wireless headset can be implemented. In addition, according to the wireless earphone provided by the embodiment of the invention, the mutually enhanced and mutually assisted array antennas are formed by different parts of the non-closed cavity formed by the metal shell, so that the wireless earphone can effectively transmit and receive wireless signals under the condition that the shell is made of all metal, the antenna design of the wireless earphone under the appearance of all metal or most metal is realized, the radiation efficiency and the performance of the wireless earphone exceed those of a conventional antenna, the gain of a free space is high, the directivity is good, the structural strength is enhanced, and the antenna design space is reduced.
Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be construed to reflect the intent: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some of the modules according to embodiments of the present invention. The present invention may also be embodied as apparatus programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website, or provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The above description is only for the specific embodiment of the present invention or the description thereof, and the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An antenna device for a wireless earphone, wherein the antenna device comprises a first resonant antenna and a second resonant antenna, wherein the first resonant antenna comprises a radiation unit connected with a main board in the wireless earphone, the second resonant antenna comprises a non-closed cavity and a slot structure which are formed by surrounding of a rod metal shell of the wireless earphone, the first resonant antenna is an energy radiation source of the antenna device, and the first resonant antenna excites the second resonant antenna to generate radiation energy;
electromagnetic waves generated by the first resonant antenna are radiated into the non-closed cavity, and after the electromagnetic waves oscillate in the non-closed cavity, a part of electromagnetic energy is radiated outwards through the gap structure.
2. The antenna device according to claim 1, wherein the slot structure is a U-shaped slot structure, and the radiating element is a U-shaped radiating element.
3. The antenna device according to claim 2, wherein the U-shaped slot structure is located at the distal end of the rod portion.
4. The antenna device according to claim 1, wherein the slot structure is an I-slot structure.
5. The antenna device according to any of claims 1-4, wherein the housing material of the wireless headset is metal, the antenna device further comprising a third resonant antenna comprising the housing of the wireless headset, the radiated energy generated by the first resonant antenna exciting the second resonant antenna being mirrored to the housing to form the third resonant antenna.
6. An antenna device according to claim 5, wherein when the resonating arm length of the third resonating antenna is greater than or equal to the resonating arm length of the second resonating antenna, the respective resonating frequencies of the third resonating antenna and the second resonating antenna are the same.
7. The antenna device according to claim 5, wherein when the resonating arm length of the third resonating antenna is shorter than the resonating arm length of the second resonating antenna, the respective resonating frequencies of the third resonating antenna and the second resonating antenna are different.
8. The antenna device according to claim 5, wherein the third resonator antenna is approximately irregularly spherical in shape.
9. The antenna device of claim 5, wherein the third resonant antenna and the second resonant antenna comprise a set of binary pair dipole array antennas.
10. A wireless earphone is characterized in that a main board, a battery, a loudspeaker assembly and a microphone assembly are accommodated in a casing of the wireless earphone, the wireless earphone comprises an antenna device, the antenna device comprises a first resonant antenna and a second resonant antenna, the first resonant antenna comprises a radiating unit connected with the main board, the second resonant antenna comprises a non-closed cavity and a slot structure which are formed by surrounding of a rod metal casing of the wireless earphone, the first resonant antenna is an energy radiation source of the antenna device, and the first resonant antenna excites the second resonant antenna to generate radiation energy;
electromagnetic waves generated by the first resonant antenna are radiated into the non-closed cavity, and after the electromagnetic waves oscillate in the non-closed cavity, a part of electromagnetic energy is radiated outwards through the gap structure.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112911455B (en) * | 2021-04-02 | 2023-02-28 | 北京有竹居网络技术有限公司 | Earphone set |
| CN112911454B (en) * | 2021-04-02 | 2023-04-18 | 北京有竹居网络技术有限公司 | Earphone set |
| CN113410615B (en) * | 2021-05-26 | 2023-01-20 | 潍坊歌尔电子有限公司 | Drive-by-wire bluetooth headset antenna and bluetooth headset |
| CN116417782A (en) * | 2021-12-31 | 2023-07-11 | 荣耀终端有限公司 | Wireless earphone and terminal antenna |
| CN115550795A (en) * | 2022-12-02 | 2022-12-30 | 深圳市晶讯技术股份有限公司 | Wireless earphone |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003101323A (en) * | 2001-07-19 | 2003-04-04 | Matsushita Electric Ind Co Ltd | Card device, electronic equipment, and radio equipment |
| CN1538626A (en) * | 2003-04-14 | 2004-10-20 | ������������ʽ���� | Wireless transmission module |
| CN1843053A (en) * | 2004-07-08 | 2006-10-04 | 索尼株式会社 | Earphone antenna connecting device and portable wireless device |
| CN103515694A (en) * | 2012-06-25 | 2014-01-15 | Gn瑞声达A/S | Antenna system for a wearable computing device |
| CN105449358A (en) * | 2015-11-27 | 2016-03-30 | 歌尔声学股份有限公司 | Antenna system for bluetooth headset and bluetooth headset |
| CN105721999A (en) * | 2014-12-22 | 2016-06-29 | 奥迪康有限公司 | Hearing instrument |
| CN106331928A (en) * | 2016-09-13 | 2017-01-11 | 富士高实业有限公司 | Pure wireless earphone provided with ground reflector |
| CN206658277U (en) * | 2016-01-12 | 2017-11-21 | 苹果公司 | Earplug, wireless earbud and electronic equipment |
| CN107732423A (en) * | 2017-09-01 | 2018-02-23 | 歌尔股份有限公司 | Antenna assembly and line traffic control bluetooth earphone |
| CN110324754A (en) * | 2019-08-01 | 2019-10-11 | 成都必盛科技有限公司 | A kind of wireless headset and electronic equipment |
| CN210137006U (en) * | 2019-08-22 | 2020-03-10 | 潍坊歌尔电子有限公司 | Antenna device and mobile terminal provided with same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11031966B2 (en) * | 2018-05-04 | 2021-06-08 | Microsoft Technology Licensing, Llc | Ultrasonic proximity sensing for SAR mitigation |
-
2020
- 2020-09-30 CN CN202011061969.1A patent/CN112510351B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003101323A (en) * | 2001-07-19 | 2003-04-04 | Matsushita Electric Ind Co Ltd | Card device, electronic equipment, and radio equipment |
| CN1538626A (en) * | 2003-04-14 | 2004-10-20 | ������������ʽ���� | Wireless transmission module |
| CN1843053A (en) * | 2004-07-08 | 2006-10-04 | 索尼株式会社 | Earphone antenna connecting device and portable wireless device |
| CN103515694A (en) * | 2012-06-25 | 2014-01-15 | Gn瑞声达A/S | Antenna system for a wearable computing device |
| CN105721999A (en) * | 2014-12-22 | 2016-06-29 | 奥迪康有限公司 | Hearing instrument |
| CN105449358A (en) * | 2015-11-27 | 2016-03-30 | 歌尔声学股份有限公司 | Antenna system for bluetooth headset and bluetooth headset |
| CN206658277U (en) * | 2016-01-12 | 2017-11-21 | 苹果公司 | Earplug, wireless earbud and electronic equipment |
| CN106331928A (en) * | 2016-09-13 | 2017-01-11 | 富士高实业有限公司 | Pure wireless earphone provided with ground reflector |
| CN107732423A (en) * | 2017-09-01 | 2018-02-23 | 歌尔股份有限公司 | Antenna assembly and line traffic control bluetooth earphone |
| CN110324754A (en) * | 2019-08-01 | 2019-10-11 | 成都必盛科技有限公司 | A kind of wireless headset and electronic equipment |
| CN210137006U (en) * | 2019-08-22 | 2020-03-10 | 潍坊歌尔电子有限公司 | Antenna device and mobile terminal provided with same |
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| Publication number | Publication date |
|---|---|
| CN112510351A (en) | 2021-03-16 |
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