CN113690578A - Wearable device - Google Patents
Wearable device Download PDFInfo
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- CN113690578A CN113690578A CN202111015477.3A CN202111015477A CN113690578A CN 113690578 A CN113690578 A CN 113690578A CN 202111015477 A CN202111015477 A CN 202111015477A CN 113690578 A CN113690578 A CN 113690578A
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- 230000001939 inductive effect Effects 0.000 claims description 11
- 230000003071 parasitic effect Effects 0.000 description 44
- 230000005855 radiation Effects 0.000 description 31
- 238000010586 diagram Methods 0.000 description 9
- 230000005404 monopole Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003954 pattern orientation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—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
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application discloses wearing equipment includes: a loop active antenna and a loop passive antenna, wherein: the annular active antenna and the annular passive antenna are arranged in the thickness direction of the wearable device at intervals, a connecting line of the circle center of the annular active antenna and the circle center of the annular passive antenna is perpendicular to the plane where the annular active antenna is located and the plane where the annular passive antenna is located, a first distance is arranged between the annular active antenna and the annular passive antenna, and the radius of the annular passive antenna is larger than that of the annular active antenna.
Description
Technical Field
The application relates to the field of terminal equipment, in particular to wearable equipment.
Background
In the 5G era, the smart watch should have one or more functions of reminding, navigation, calibration, monitoring, interaction, and the like, in addition to indicating time. The wireless communication system is the most critical ring that the smart watch wants to implement the interactive function with other devices, and the antenna is a very important component for the wireless communication system.
The smart watches in the market at present have the characteristics of compact structure, miniaturization and the like, but the characteristics mean that clearance environment is deteriorated for antenna design, the area of the antenna wiring is reduced, the deterioration of the clearance environment can cause the smart watches to be in different use scenes, the directional diagram of a Global Positioning System (GPS) antenna is unstable, the performance of the antenna is influenced, and further the user experience is influenced.
Disclosure of Invention
The application discloses wearing equipment has solved under being in the use scene of difference, and the directional diagram of antenna is unstable, influences the antenna performance, and then influences user experience's problem.
In order to solve the above problems, the following technical solutions are adopted in the present application:
the embodiment of the application discloses wearing equipment includes: a loop active antenna and a loop passive antenna, wherein: the annular active antenna and the annular passive antenna are arranged in the thickness direction of the wearable device at intervals, a connecting line of the circle center of the annular active antenna and the circle center of the annular passive antenna is perpendicular to the plane where the annular active antenna is located and the plane where the annular passive antenna is located, a first distance is arranged between the annular active antenna and the annular passive antenna, and the radius of the annular passive antenna is larger than that of the annular active antenna.
The technical scheme adopted by the application can achieve the following beneficial effects:
the application provides a wearing equipment includes: a loop active antenna and a loop passive antenna, wherein: the annular active antenna and the annular passive antenna are arranged in the thickness direction of the wearable device at intervals, a connecting line of the circle center of the annular active antenna and the circle center of the annular passive antenna is perpendicular to a plane where the annular active antenna is and a plane where the annular passive antenna is, a first distance is arranged between the annular active antenna and the annular passive antenna, and the radius of the annular passive antenna is larger than that of the annular active antenna. Annular passive antenna is introduced to this application, sets up annular active antenna and annular passive antenna interval, and the radius through setting up annular passive antenna is greater than annular active antenna's radius to and adjust the spacing distance between annular active antenna and the annular passive antenna, realize the adjustment to the radiation pattern of annular passive antenna and annular active antenna array, the performance of reinforcing antenna, and then promote user experience.
Drawings
Fig. 1a is a top view of an antenna system structure of a wearable device disclosed in an embodiment of the present application;
fig. 1b is a side view of an antenna system structure of a wearable device according to an embodiment of the present disclosure;
fig. 2a is a schematic structural diagram of an antenna system of a wearable device disclosed in an embodiment of the present application;
FIG. 2b is a schematic diagram of the radiation pattern corresponding to FIG. 2 a;
fig. 3a is a schematic structural diagram of an antenna system of another wearable device disclosed in the embodiments of the present application;
FIG. 3b is a schematic diagram of the radiation pattern corresponding to FIG. 3 a;
fig. 4 is a side view of an antenna system structure of another wearable device disclosed in an embodiment of the present application;
fig. 5a is a schematic structural diagram of an antenna system of another wearable device disclosed in the embodiments of the present application;
fig. 5b is a schematic diagram of the radiation pattern corresponding to fig. 5 a.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The application discloses wearing equipment, fig. 1a is a top view of an antenna system structure of wearing equipment disclosed in the embodiment of the application, and fig. 1b is a side view of the antenna system structure of wearing equipment disclosed in the embodiment of the application.
As shown in fig. 1a and 1b, the wearing device disclosed in the present application includes: a loop active antenna 110 and a loop passive antenna 120, wherein: the annular active antenna 110 and the annular passive antenna 120 are arranged at intervals in the thickness direction of the wearable device, a connection line between the circle center of the annular active antenna 110 and the circle center of the annular passive antenna 120 is perpendicular to a plane where the annular active antenna 110 is located and a plane where the annular passive antenna 120 is located, a first distance is arranged between the annular active antenna 110 and the annular passive antenna 120, and the radius of the annular passive antenna 120 is larger than that of the annular active antenna 110.
The loop parasitic antenna 120 forms an induced current by inducing an electromagnetic field of the loop active antenna 110, and assuming that the antenna is in the form of a dipole antenna, the loop active antenna 110 has a current of I1The induced current of the loop parasitic antenna 120 is I2The first distance between the loop-shaped active antenna 110 and the loop-shaped passive antenna 120 is H, and the element currents are distributed in a sine manner, and the directional diagram function of the binary array can be obtained through approximate calculation: f2(θ)＝1+mej(kH*cosθ+ξ)Where m denotes a current amplitude ratio | I of the two antennas2|/|I1And l, calculating by using an impedance equation of the coupled oscillator to obtain:
ξ＝π+arctanX21/R21-arctanX22/R22wherein R and X represent resistance and reactance, respectively, R21Resistance part, X, representing the mutual impedance of the loop parasitic antenna 12021Representing the loop parasitic antenna 120 mutual impedanceReactive part of, R22Resistance part, X, representing the self-impedance of the loop parasitic antenna 12022Representing the reactive part of the self-impedance of the loop passive antenna 120. The mutual impedance and the self impedance affect the amplitude and the phase of the induced field of the loop parasitic antenna 120, and it can be known from the above relation that the directional pattern of the binary array can be changed by changing the self impedance and the mutual impedance of the loop parasitic antenna 120, further, the mutual impedance can be changed by changing the spatial relation between the loop parasitic antenna 120 and the loop active antenna 110, and the self impedance can be changed by changing the self structure of the loop parasitic antenna 120.
Regarding changing the mutual impedance by changing the spatial relationship between the loop-shaped passive antenna 120 and the loop-shaped active antenna 110, specifically, the mutual impedance between the loop-shaped passive antenna 120 and the loop-shaped active antenna 110 can be changed by changing the first distance between the loop-shaped passive antenna 120 and the loop-shaped active antenna 110, so as to adjust the radiation patterns of the array of the loop-shaped passive antenna 120 and the loop-shaped active antenna 110, enhance the performance of the antenna, and further enhance the user experience.
In the embodiment of the present application, the radius of the loop passive antenna 120 is larger than that of the loop active antenna 110. By adjusting the radius difference between the annular passive antenna 120 and the annular active antenna 110, the mutual impedance between the annular passive antenna 120 and the annular active antenna 110 can be changed, the amplitude of the induced current of the annular passive antenna 120 is adjusted, the radiation pattern of the array of the annular passive antenna 120 and the annular active antenna 110 is adjusted, the performance of the antenna is enhanced, and the user experience is further improved.
The application provides a wearing equipment includes: a loop active antenna 110 and a loop passive antenna 120, wherein: the annular active antenna 110 and the annular passive antenna 120 are arranged at intervals in the thickness direction of the wearable device, a connection line between the circle center of the annular active antenna 110 and the circle center of the annular passive antenna 120 is perpendicular to a plane where the annular active antenna 110 is located and a plane where the annular passive antenna 120 is located, a first distance is arranged between the annular active antenna 110 and the annular passive antenna 120, and the radius of the annular passive antenna 120 is larger than that of the annular active antenna 110. Annular passive antenna 120 is introduced to this application, set up annular active antenna 110 and annular passive antenna 120 interval, the radius through setting up annular passive antenna 120 is greater than annular active antenna 110's radius, and adjust the spacing distance between annular active antenna 110 and the annular passive antenna 120, realize the adjustment to the radiation pattern of annular passive antenna 120 and the annular active antenna 110 group battle array, the performance of reinforcing antenna, and then promote user experience.
In a possible implementation manner, the radiation patterns of the array of the loop parasitic antenna 120 and the loop active antenna 110 may be adjusted by switching the electrical length of the loop parasitic antenna 120 to change the self-impedance. Specifically, as shown in fig. 2a, the wearable device further includes a first control switch, wherein: the feeding point 420 of the loop active antenna 110 is disposed at a first position of the loop active antenna 110, and the first control switch is configured to control at least one of a second position, a third position, and a fourth position of the loop active antenna 110 to be connected to or disconnected from ground, where a first connection line between the first position and the third position passes through a center of the loop active antenna, a second connection line between the second position and the fourth position passes through the center of the loop active antenna, and the first connection line is perpendicular to the second connection line.
Taking the smart watch as an example, the first position and the third position are positions far away from the hand of the person in the smart watch. By placing the feed point 420 at a first location away from the human hand, the effect of the human body on the antenna performance can be reduced. In the case where the first control switch controls the ground position of the loop active antenna 110 to be different, the loop active antenna 110 may excite different modes and radiation pattern orientations. For example, in the case that the first control switch controls the second position, the third position and the fourth position of the loop active antenna 110 to be disconnected from the ground, the main antenna form of the loop active antenna 110 is a Monopole, and a Monopole (Monopole) mode is excited; under the condition that the first control switch controls the second position or the fourth position of the Loop active antenna 110 to be conducted with the ground, the main antenna form of the Loop active antenna 110 is a Loop antenna, a Loop (Loop) mode is excited, and at the moment, the Loop active antenna 110 forms two radiation paths, specifically, a small Loop from the feeding point 420 to the second position and the rest LoopThe working frequencies of the large ring formed by the residual radiation arms are respectively f1And f2(f1＞f2) Meanwhile, the first control switch controls the second position or the fourth position of the annular active antenna 110 to be conducted with the ground, and a radiation pattern corresponding to the annular active antenna 110 is a mirror image about the X axis; under the condition that the first control switch controls the third position of the Loop active antenna 110 to be conducted with the ground, the main antenna form of the Loop active antenna 110 is a Loop antenna, a Loop (Loop) mode is excited, the Loop active antenna comprises two radiation arms with equal length, and the corresponding working frequency is f3(f1＞f3＞f2)。
Of course, the grounding position of the loop active antenna 110 is not limited to the second position, the third position or the fourth position, and the grounding position of the loop active antenna 110 may be adjusted according to a specific design, which is not specifically limited in this application.
In the embodiment of the present application, as shown in fig. 2a, the wearable device further includes a second control switch 410, wherein: a fifth position of the loop parasitic antenna 120 is provided with a first break 430, and the second control switch 410 is configured to control the first break 430 to be turned on or off, and control at least one of a sixth position, a seventh position and an eighth position of the loop parasitic antenna 120 to be turned on or off with ground, where the fifth position corresponds to the first position, the sixth position corresponds to the second position, the seventh position corresponds to the third position, and the eighth position corresponds to the fourth position.
In this application, the first position, the second position, the third position, and the fourth position are positions on the active loop antenna 110, where a first connection line between the first position and the third position passes through a center of the active loop antenna 110, a second connection line between the second position and the fourth position passes through a center of the active loop antenna 110, and the first connection line is perpendicular to the second connection line. The fifth position, the sixth position, the seventh position, and the eighth position are positions on the loop parasitic antenna 120, and the fifth position corresponds to the first position, the sixth position corresponds to the second position, the seventh position corresponds to the third position, and the eighth position corresponds to the fourth position, for example, if the first position is a "12 o 'clock" position on the loop active antenna 110, the fifth position is a "12 o' clock" position on the loop parasitic antenna 120; if the second position is a "3 o 'clock" position on the loop active antenna 110, the sixth position is a "3 o' clock" position on the loop passive antenna 120; if the third position is the "6 o 'clock" position on the loop active antenna 110, the seventh position is the "6 o' clock" position on the loop passive antenna 120; if the fourth position is a "9 o 'clock" position on the loop active antenna 110, then the eighth position is a "9 o' clock" position on the loop passive antenna 120.
In the case that the second control switch 410 controls the first break 430 arranged at the fifth position of the loop-shaped passive antenna 120 to be disconnected, and the second control switch 410 controls the sixth position, the seventh position and the eighth position of the loop-shaped passive antenna 120 to be disconnected from the ground, the antenna of the loop-shaped passive antenna 120 is in the form of a suspended parasitic antenna, and in this state, the radiation pattern is more towards the normal direction, corresponding to 301 of fig. 2 b; when the sixth position of the loop parasitic antenna 120 is controlled by the second control switch 410 to be conducted to the ground, the phase of the induced current on the loop parasitic antenna 120 is advanced with respect to the loop active antenna 110, so that the maximum radiation pattern is biased to the side of the loop active antenna 110, corresponding to 302 of fig. 2b, and at this time, the loop parasitic antenna 120 mainly functions as a reflector; when the seventh position of the loop parasitic antenna 120 is controlled by the second control switch 410 to be conducted to the ground, the loop parasitic antenna 120 is in a monopole form (T mode), and the length of the radiating arm is reduced at this time, and the phase of the induced current on the loop parasitic antenna 120 lags behind that of the loop active antenna 110, so that the maximum radiation pattern is biased toward the loop parasitic antenna 120, corresponding to 304 in fig. 2 b.
According to the embodiment of the application, the second control switch 410 is used for controlling the switching of the grounding position of the annular passive antenna 120, on the basis that the structural strength is not damaged, the self impedance of the annular passive antenna 120 is changed, the relative phase of the induced current of the annular passive antenna 120 and the annular active antenna 110 is controlled, the regulation and control of the radiation pattern of the array of the annular passive antenna 120 and the annular active antenna 110 are realized, and the user experience is improved.
In another possible implementation manner, as shown in fig. 3a, the feeding point 420 of the loop active antenna 110 is disposed at a first position of the loop active antenna 110, and a third position of the loop active antenna 110 is grounded, wherein a third connection line between the first position and the third position passes through a center of the loop active antenna 110.
In the case where the feeding point 420 of the Loop active antenna 110 is disposed at the first position of the Loop active antenna 110 and the third position of the Loop active antenna 110 is grounded, the Loop active antenna 110 is in the form of a Loop antenna, and a Loop (Loop) mode is excited, and the directional pattern of the antenna is mainly directed at both sides. At this time, the electrical length of the loop parasitic antenna 120 is greater than the electrical length of the loop active antenna 110, the phase of the current of the loop parasitic antenna 120 is ahead of the phase of the current of the loop active antenna 110, the radiation pattern is biased toward the loop active antenna 110, the loop parasitic antenna 120 mainly functions as a reflector, and the sidewall 310 disposed around the loop parasitic antenna 120 can enhance the reflection of the loop parasitic antenna 120 on the loop active antenna 110.
In the embodiment of the present application, as shown in fig. 3a, the wearable device further includes a third control switch 510, wherein: a first break 430 is arranged at a fifth position of the loop-shaped passive antenna 120, a second break 520 is arranged at a seventh position of the loop-shaped passive antenna 120, and a third control switch 510 is used for controlling at least one of a sixth position and an eighth position of the loop-shaped passive antenna 120 to be connected with or disconnected from the ground, wherein a fourth connecting line of the fifth position and the seventh position passes through the center of the loop-shaped passive antenna, a fifth connecting line of the sixth position and the eighth position passes through the center of the loop-shaped passive antenna, the fourth connecting line is perpendicular to the fifth connecting line, the first position corresponds to the fifth position, and the third position corresponds to the seventh position.
In the case where the sixth position and the eighth position of the loop-shaped passive antenna 120 are both controlled to be disconnected from ground by the third control switch 510, the loop-shaped passive antenna 120 is in the form of a floating parasitic antenna, and the radiation pattern is more oriented to the normal direction at this time, which corresponds to 401 of fig. 3 b; when the sixth position of the loop parasitic antenna 120 is controlled by the third control switch 510 to be conducted to ground, the electrical length of the loop parasitic antenna 120 is greater than the electrical length of the loop active antenna 110, the phase of the current of the loop parasitic antenna 120 is advanced with respect to the loop active antenna 110, and the radiation pattern is biased toward the active antenna, which corresponds to 402 of fig. 3 b; when the sixth position of the loop parasitic antenna 120 is controlled to be conducted to ground by the third control switch 510, the electrical length of the loop parasitic antenna 120 is greater than the electrical length of the loop active antenna 110, the phase of the current of the loop parasitic antenna 120 is advanced with respect to the loop active antenna 110, and the radiation pattern is biased toward the active antenna, which corresponds to 403 in fig. 3 b. By using the switching of scenes, left and right switching of radiation patterns can be realized.
In a further technical solution, the wearable device may further include a capacitive element, one end of the capacitive element is electrically connected to the sixth location, and the other end of the capacitive element is electrically connected to ground, and/or one end of the capacitive element is electrically connected to the eighth location, and the other end of the capacitive element is electrically connected to ground. As for the above-mentioned loop-shaped passive antenna 120, a capacitance element may be connected in series between the sixth position and the ground and/or between the eighth position and the ground, which is equivalent to that the size of the loop-shaped passive antenna 120 is shortened, so that more combination states may be generated, and the purpose of controlling the radiation directivity of the antenna is achieved. Specifically, the smaller the capacitance of the series-connected capacitive element, the shorter the size of the loop parasitic antenna 120.
In another possible implementation manner, the wearable device may further include an inductive element, one end of the inductive element is electrically connected to the sixth location, and the other end of the inductive element is electrically connected to ground, and/or one end of the inductive element is electrically connected to the eighth location, and the other end of the inductive element is electrically connected to ground. For the above-mentioned loop parasitic antenna 120, an inductance element may be connected in series between the sixth position and the ground and/or between the eighth position and the ground, which is equivalent to the size of the loop parasitic antenna 120 being longer, so that more combination states may be generated, and the purpose of controlling the radiation directivity of the antenna may be achieved. Specifically, the larger the inductance of the series inductance element, the longer the equivalent size of the loop passive antenna 120.
In this embodiment of the application, the first position mentioned above overlaps with the projection of the wearing piece of the wearing device on the plane perpendicular to the plane where the annular active antenna 110 is located, as shown in fig. 2a, taking the wearing device as an example of a smart watch, the wearing piece of the wearing device is a connecting piece connecting the watch plate and the watch band on the smart watch, and the feeding point 420 is disposed at the first position on the annular active antenna 110 away from the human hand, that is, the feeding point 420 is disposed at the position of the connecting piece connecting the watch plate and the watch band, so as to reduce the influence of the human body on the antenna performance.
In the present application, when the electrical length of the loop parasitic antenna 120 is greater than the electrical length of the loop active antenna 110, the phase of the current of the loop parasitic antenna 120 leads the phase of the current of the loop active antenna 110, and the radiation pattern is biased toward the loop active antenna 110, and the loop parasitic antenna 120 mainly functions as a reflector. Further, as shown in fig. 4, the periphery of the loop-shaped passive antenna 120 is provided with a sidewall 310. The peripherally disposed sidewalls 310 of the loop parasitic antenna 120 may enhance the reflection of the loop active antenna 110 by the loop parasitic antenna 120.
In one possible implementation, as shown in fig. 5a, the loop-shaped passive antenna 120 may be connected with a rear cover 810 of the wearable device. Specifically, the loop-shaped passive antenna 120 and the rear cover 810 of the wearable device can be connected to increase the sensing area of the passive antenna as a whole by connecting the loop-shaped passive antenna 120 and the rear cover 810 of the wearable device, and the control of the radiation directivity of the antenna can be realized by changing the phase of the induced current of the passive antenna formed by the loop-shaped passive antenna 120 and the rear cover 810 of the wearable device.
In a further technical solution, the wearable device may further include a fourth control switch 910, the loop passive antenna 120 and the rear cover 810 are divided into a plurality of independent passive sub-areas, and the fourth control switch 910 is configured to control connection or disconnection between the plurality of passive sub-areas. Specifically, the passive antenna composed of the loop passive antenna 120 and the rear cover 810 may be divided into N passive subregions independent from each other, and the fourth control switch 910 controls connection or disconnection between the plurality of passive subregions, so as to switch the electrical length of the passive antenna composed of the loop passive antenna 120 and the rear cover 810, and further change the phase of the induced current of the passive antenna composed of the loop passive antenna 120 and the rear cover 810.
As shown in fig. 5a, for example, the passive antenna composed of the loop passive antenna 120 and the rear cover 810 can be divided into four independent passive sub-areas, and the fourth control switch 910 controls connection or disconnection between the four independent passive sub-areas. Under the condition that the fourth control switch 910 controls the four independent passive sub-areas to be disconnected, at this time, the passive antenna composed of the loop passive antenna 120 and the rear cover 810 is in a suspended parasitic form, and the radiation pattern of the antenna is in the normal direction, which corresponds to 501 in fig. 5 b; in the case where the fourth control switch 910 controls the first area 901, the second area 902 and the third area 903 as shown in fig. 5a to be connected into a whole, the electrical length thereof is significantly greater than the electrical length of the loop active antenna 110, the induced current phase of the passive antenna leads the loop active antenna 110, the radiation pattern of the passive antenna is directed toward the loop active antenna 110 side to function as a reflector, meanwhile, the electrical length of the fourth area 904 as shown in fig. 5a is shorter than the electrical length of the loop active antenna 110, the induced current phase lags the loop active antenna 110, the radiation pattern is deflected toward the fourth area 904 side to function as a director, and when the two effects of the passive antenna are added, the radiation pattern of the antenna is deflected toward the fourth area 904 side to function as 502 of fig. 5 b.
By controlling the connection or disconnection between the passive subregions by the fourth control switch 910, the radiation pattern can be switched 502/503/504/505 as shown in fig. 5b, resulting in a beam-like scanning effect. Further, the more passive antenna composed of the loop passive antenna 120 and the rear cover 810 includes passive subregions, the higher the accuracy of beam scanning.
In addition, for an antenna having a high gain requirement, such as a Global Positioning System (GPS) antenna, a reflector and a director may be added in the Z-axis direction by a stacked design, so as to improve the gain of the antenna and improve the user experience.
The wearing equipment disclosed in the embodiment of the application can be wearable equipment such as a smart watch, and the embodiment of the application does not limit the specific type of the wearing equipment.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (11)
1. A wearable device, comprising: a loop active antenna and a loop passive antenna, wherein:
the annular active antenna and the annular passive antenna are arranged in the thickness direction of the wearable device at intervals, a connecting line of the circle center of the annular active antenna and the circle center of the annular passive antenna is perpendicular to the plane where the annular active antenna is located and the plane where the annular passive antenna is located, a first distance is arranged between the annular active antenna and the annular passive antenna, and the radius of the annular passive antenna is larger than that of the annular active antenna.
2. The wearable device of claim 1, further comprising a first control switch, wherein:
the feeding point of the annular active antenna is arranged at a first position of the annular active antenna, the first control switch is used for controlling at least one of a second position, a third position and a fourth position of the annular active antenna to be connected with or disconnected from the ground, wherein a first connecting line of the first position and the third position penetrates through the circle center of the annular active antenna, a second connecting line of the second position and the fourth position penetrates through the circle center of the annular active antenna, and the first connecting line is perpendicular to the second connecting line.
3. The wearable device of claim 2, further comprising a second control switch, wherein:
the loop-shaped passive antenna is characterized in that a fifth position of the loop-shaped passive antenna is provided with a first fracture, the second control switch is used for controlling the connection or disconnection of the first fracture and controlling at least one of a sixth position, a seventh position and an eighth position of the loop-shaped passive antenna to be connected or disconnected with the ground, wherein the fifth position corresponds to the first position, the sixth position corresponds to the second position, the seventh position corresponds to the third position, and the eighth position corresponds to the fourth position.
4. The wearable device according to claim 1, wherein a feed point of the loop active antenna is disposed at a first position of the loop active antenna, and a third position of the loop active antenna is grounded, wherein a third connection line between the first position and the third position passes through a center of the loop active antenna.
5. The wearable device of claim 4, further comprising a third control switch, wherein:
the loop-shaped passive antenna is characterized in that a first fracture is arranged at a fifth position of the loop-shaped passive antenna, a second fracture is arranged at a seventh position of the loop-shaped passive antenna, the third control switch is used for controlling at least one of a sixth position and an eighth position of the loop-shaped passive antenna to be connected with or disconnected from the ground, a fourth connecting line of the fifth position and the seventh position penetrates through the circle center of the loop-shaped passive antenna, a fifth connecting line of the sixth position and the eighth position penetrates through the circle center of the loop-shaped passive antenna, the fourth connecting line is perpendicular to the fifth connecting line, the first position corresponds to the fifth position, and the third position corresponds to the seventh position.
6. The wearable device according to claim 5, further comprising a capacitive element, one end of the capacitive element being electrically connected to the sixth location and the other end of the capacitive element being grounded, and/or one end of the capacitive element being electrically connected to the eighth location and the other end of the capacitive element being grounded.
7. The wearable device according to claim 5, further comprising an inductive element, one end of the inductive element being electrically connected to the sixth location and the other end of the inductive element being electrically connected to ground, and/or one end of the inductive element being electrically connected to the eighth location and the other end of the inductive element being electrically connected to ground.
8. Wearing device according to one of claims 2 to 7, wherein said first position overlaps a projection of a wearing piece of said wearing device on a plane perpendicular to the plane of said annular active antenna.
9. The wearable device according to any of claims 1 to 7, wherein the perimeter of the loop-shaped passive antenna is provided with a sidewall.
10. The wearable device according to claim 2 or 4, wherein the loop-shaped passive antenna is connected with a back cover of the wearable device.
11. The wearable device according to claim 10, further comprising a fourth control switch, wherein the loop passive antenna and the back cover are divided into a plurality of independent passive sub-areas, and the fourth control switch is configured to control connection or disconnection between the plurality of passive sub-areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| EP4336652A1 (en) * | 2022-08-29 | 2024-03-13 | TE Connectivity Solutions GmbH | Antenna for wearable devices |
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