Antenna, middle frame assembly and electronic equipment
By setting a gap between the radiator and the suspended parasitic branch, and adjusting the inductance and capacitance values using an adjustment circuit, cross-coupling of electromagnetic parasites is achieved, thus solving the problem of the impact of antenna spatial design on radiation efficiency and improving the overall performance of the antenna.
Patent Information
- Application Number
- CN202410565890.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-11-11
AI Technical Summary
Existing antennas suffer from reduced radiation efficiency due to space design requirements, which affects antenna performance, especially mid-to-high frequency (MHB) antennas.
By setting a gap between the radiator and the suspended parasitic branch, and adjusting the inductance value using the first adjustment circuit and the capacitance value using the second adjustment circuit, cross-coupling of electrical parasitic and magnetic parasitic is achieved, thereby increasing the radiation efficiency of the antenna.
Without increasing the space occupied by the antenna, the radiation efficiency and performance of the antenna are significantly improved, especially the efficiency improvement of 1.7dB in the mid-to-high frequency band.
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Figure CN120933650A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of antenna technology, and more particularly to an antenna, a mid-frame assembly, and an electronic device. Background Technology
[0002] With the continuous development of electronic devices, the performance requirements for antennas are becoming increasingly stringent. However, in order to meet spatial design requirements, antennas in related technologies often compromise radiation efficiency, leading to reduced radiation efficiency and consequently affecting antenna performance. Summary of the Invention
[0003] The purpose of this disclosure is to provide an antenna, a mid-frame assembly, and an electronic device to solve the problems in the aforementioned related technologies.
[0004] To achieve the above objectives, one aspect of this disclosure provides an antenna including a radiator and a suspended parasitic branch;
[0005] The radiator and the suspended parasitic branch are spaced apart by a gap;
[0006] The radiator is provided with a power feed point and a grounding point. The power feed point is connected to a power feed line. The suspended parasitic branch is connected to a first adjustment line and a second adjustment line.
[0007] The first adjustment circuit is configured to adjust the inductance value, and the second adjustment circuit is configured to adjust the capacitance value.
[0008] Optionally, the first adjustment line and the second adjustment line are respectively located near the two ends of the suspended parasitic branch, the middle of the suspended parasitic branch has an equilibrium point, and the first adjustment line and the second adjustment line are respectively located on both sides of the equilibrium point.
[0009] Optionally, the first adjustment circuit includes at least two first inductors, which are connected in parallel, each of which is grounded, and each of which may be selectively connected to the suspended parasitic branch.
[0010] Optionally, the first adjustment circuit further includes at least two first switches, each of which corresponds to a first inductor. Each first switch is connected in series with the corresponding first inductor, and the inductance value is adjusted by controlling the opening and closing of the first switch to control the corresponding first inductor.
[0011] Optionally, the second adjustment circuit includes at least two first capacitors connected in parallel, each of the first capacitors being grounded, and the first capacitors being selectively connected to the suspended parasitic branch.
[0012] Optionally, the second adjustment circuit further includes at least two second switches, each of which corresponds to one of the first capacitors. Each second switch is connected in series with the corresponding first capacitor, and the opening and closing of the second switch controls the corresponding first capacitor to adjust the capacitance value.
[0013] Optionally, the radiator includes a first radiator and a second radiator, the first radiator being provided with the feed line, the second radiator being provided with the grounding point, and the fracture includes a first fracture and a second fracture, the first radiator being spaced apart from the suspended parasitic branch through the first fracture, and the second radiator being spaced apart from the suspended parasitic branch through the second fracture.
[0014] Optionally, the first radiator and the second radiator are disposed on both sides of the suspended parasitic branch, with the first adjustment line close to the first fracture and the second adjustment line close to the second fracture.
[0015] Optionally, the first radiator and / or the second radiator are formed as IFA antennas, and the first radiator and / or the second radiator are provided with ribs, wherein the distance between the rib of the first radiator and the first gap and / or the distance between the rib of the second radiator and the second gap is one-quarter of the wavelength of the radiated wave.
[0016] Optionally, the power supply line includes a third inductor, a third capacitor, a fourth inductor, a fifth inductor, and a fourth capacitor;
[0017] The third inductor is grounded;
[0018] The third capacitor and the fourth inductor are connected in series to form a first circuit, and the first circuit is connected in parallel with the third inductor.
[0019] The fifth inductor and the fourth capacitor are connected in parallel and grounded to form a second circuit, which is connected in series with the first circuit.
[0020] A second aspect of this disclosure also provides a mid-frame assembly including the aforementioned antenna.
[0021] A third aspect of this disclosure also provides an electronic device including the antenna described above, or the mid-frame assembly described above.
[0022] In the above technical solution, the antenna adjusts the inductance value through a first adjustment circuit, thereby changing the current path through electrical parasitism. At the same time, it adjusts the capacitance value through a second adjustment circuit, thereby changing the magnetic field path through a combination of magnetic parasitism. Both the first and second adjustment circuits are located on suspended parasitic stubs. Thus, through the mutual cross-coupling of electrical and magnetic parasitism, the antenna's radiation efficiency is increased and its performance is improved without affecting the space occupied by the antenna.
[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0025] Figure 1 This is a schematic diagram of the structure of an antenna according to one embodiment of the present disclosure;
[0026] Figure 2 This is a schematic diagram of an antenna according to one embodiment of the present disclosure.
[0027] Explanation of reference numerals in the attached figures
[0028] 1. Radiator; 11. First radiator; 12. Second radiator; 13. Rib position;
[0029] 2. Suspended parasitic branch; 21. First regulating circuit; 211. First inductor; 212. First switch; 22. Second regulating circuit; 221. First capacitor; 222. Second switch;
[0030] 31. First fracture; 32. Second fracture;
[0031] 4. Feeder line; 41. Third inductor; 42. Third capacitor; 43. Fourth inductor; 44. Fifth inductor; 45. Fourth capacitor.
[0032] 5. Grounding point. Detailed Implementation
[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0034] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are generally used to define the orientation of the accompanying drawings, and "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0036] With the continuous development of electronic devices, they are moving towards larger screen ratios and thinner profiles. This results in increasingly limited internal design space for electronic devices, smaller design space for antennas, and increasingly higher performance requirements for antennas. For example, users have a stronger demand for multi-band antennas that can cover multiple antenna bands and improve the performance of each band.
[0037] In order to meet space design requirements, antennas in related technologies often compromise radiation efficiency, leading to reduced radiation efficiency and consequently affecting antenna performance. This is especially true for mid-to-high frequency (MHB) antennas, where the single-fed induction antenna (IFA) scheme is commonly used in mobile electronic devices.
[0038] Therefore, such as Figure 1 and Figure 2 As shown, one aspect of this disclosure provides an antenna including a radiator 1 and a suspended parasitic branch 2.
[0039] The radiator 1 and the suspended parasitic branch 2 are separated by a gap.
[0040] The radiator 1 is provided with a power supply point and a grounding point. The power supply point is connected to a power supply line 4, and the suspended parasitic branch 2 is connected to a first regulating line 21 and a second regulating line 22.
[0041] The first adjustment circuit 21 is configured to adjust the inductance value, and the second adjustment circuit 22 is configured to adjust the capacitance value.
[0042] The suspended parasitic branch 2 can be equipped with a first connection point and a second connection point. A first adjustment line 21 is connected to the first connection point, and a second adjustment line 22 is connected to the second connection point. The first adjustment line 21 is used to change the inductance value. When the inductance value changes, the current changes, which in turn changes the corresponding magnetic field. This changing magnetic field generates an electric field, causing a change in the current path—this is electroparasitism. The second adjustment line 22 is used to change the capacitance value. When the capacitance value changes, the corresponding electric field changes, which in turn generates a magnetic field, causing a change in the magnetic field path—this is magnetic parasitism.
[0043] In the above technical solution, the antenna adjusts the inductance value through the first adjustment line 21, thereby changing the current path through electrical parasitism. At the same time, it adjusts the capacitance value through the second adjustment line 22, thereby changing the magnetic field path through a combination of magnetic parasitism. Both the first adjustment line 21 and the second adjustment line 22 are on the suspended parasitic stub 2. Thus, through the mutual cross-coupling of electrical parasitism and magnetic parasitism, the antenna's radiation efficiency is increased and the antenna's performance is improved without affecting the space occupied by the antenna.
[0044] Optionally, in one embodiment of this disclosure, the first adjustment line 21 and the second adjustment line 22 are respectively located near the two ends of the suspended parasitic branch 2, and the suspended parasitic branch 2 has a balance point in the middle. The first adjustment line 21 and the second adjustment line 22 are located on both sides of the balance point. This arrangement facilitates the combination of electroparasitism and magnetic parasitism.
[0045] The equilibrium point is a virtual point, which can be the center point of the suspended parasitic branch 2. That is to say, the equilibrium point is not a physical structure. It is set to separate the first adjustment line 21 and the second adjustment line 22, and they are not on the same side of the suspended parasitic branch 2.
[0046] Optionally, in one embodiment of this disclosure, the first adjustment circuit 21 includes at least two first inductors 211, which are connected in parallel. Each first inductor 211 is grounded, and each first inductor 211 can be selectively connected to the suspended parasitic branch 2. By connecting multiple first inductors 211 in parallel, the inductance value can be changed by adjusting the electrical conduction between different numbers of first inductors 211 and the suspended parasitic branch 2.
[0047] Optionally, the inductance values of at least two first inductors 211 are different, thereby allowing multiple first inductors 211 to work together to achieve a wider adjustment range, enabling the transmission of electromagnetic waves in more frequency bands, providing more options, and further improving the performance of the antenna.
[0048] In some examples, the number of first inductors 211 is four, connected in parallel. The inductance value can be adjusted by individually connecting each of the four first inductors 211 to the suspended parasitic branch 2 or by pairing the four first inductors 211 together. Of course, it should be noted that the number of first inductors 211 can be designed according to the actual situation, and no further restrictions are imposed here.
[0049] Optionally, in one embodiment of this disclosure, the first adjustment circuit 21 further includes at least two first switches 212, each corresponding to a first inductor 211. Each first switch 212 is connected in series with its corresponding first inductor 211, and the inductance value is adjusted by controlling the opening and closing of the first switch 212 to control the corresponding first inductor 211. The first switches 212 provide convenient control over the corresponding first inductor 211 and facilitate adjustment of the inductance value.
[0050] In this circuit, a first switch 212 and a first inductor 211 are connected in series to form a first branch. Multiple first branches are connected in parallel. The opening and closing of the first switch 212 in each first branch controls whether the corresponding first inductor 211 is electrically conductive, thereby adjusting the inductance value. In some examples, there are also four first switches 212, thus forming four first branches.
[0051] In some examples, the inductance can be adjusted to 33nH by the cooperation of multiple first inductors 211 in the first adjustment line 21, thereby generating state B1, while when the inductance is adjusted to 5nH, state B40 can be generated.
[0052] Optionally, in one embodiment of this disclosure, the second adjustment circuit 22 includes at least two first capacitors 221 connected in parallel, each first capacitor 221 being grounded, and the first capacitors 221 being selectively connected to the suspended parasitic branch 2. By connecting multiple first capacitors 221 in parallel, the capacitance value can be changed by adjusting the electrical conduction of different numbers of first capacitors 221 with the suspended parasitic branch 2.
[0053] Optionally, at least two of the first capacitors 221 have different capacitance values, thereby allowing multiple first capacitors 221 to work together to achieve a wider adjustment range, enabling the transmission of electromagnetic waves in more frequency bands, providing more options, and further improving the performance of the antenna.
[0054] In some examples, the number of first capacitors 221 is four, connected in parallel. The capacitance value can be adjusted by individually connecting each of the four first capacitors 221 to the suspended parasitic branch 2 or by pairing the four first capacitors 221 together. Of course, it should be noted that the number of first capacitors 221 can be designed according to the actual situation, and no further restrictions are imposed here.
[0055] Optionally, in one embodiment of this disclosure, the second adjustment circuit 22 further includes at least two second switches 222, each corresponding to a first capacitor 221. Each second switch 222 is connected in series with a corresponding first capacitor 221, and the opening and closing of the second switches 222 controls the corresponding first capacitor 221 to adjust its capacitance value. The second switches 222 provide convenient control over the corresponding first capacitor 221, facilitating easy adjustment of its capacitance value.
[0056] In this circuit, a second switch 222 is connected in series with a first capacitor 221 to form a second branch. Multiple second branches are connected in parallel. The opening and closing of the second switch 222 in each second branch controls whether the corresponding first capacitor 221 is electrically conductive, thereby adjusting the capacitance value. In some examples, there are also four second switches 222, thus forming four second branches.
[0057] Optionally, in one embodiment of this disclosure, the radiator 1 includes a first radiator 11 and a second radiator 12. The first radiator 11 is provided with a feed line 4, and the second radiator 12 is provided with a grounding point 5. The gap includes a first gap 31 and a second gap 32. The first radiator 11 is spaced apart from the suspended parasitic branch 2 through the first gap 31, and the second radiator 12 is spaced apart from the suspended parasitic branch 2 through the second gap 32. This arrangement improves the radiation efficiency of the suspended parasitic branch 2 on the electromagnetic waves radiated by the first radiator 11 and the second radiator 12, thereby improving the overall antenna performance.
[0058] Optionally, in one embodiment of this disclosure, the first radiator 11 and the second radiator 12 are disposed on both sides of the suspended parasitic branch 2, the first adjustment line 21 is close to the first fracture 31, and the second adjustment line 22 is close to the second fracture 32.
[0059] The suspended parasitic branch 2 is located between the first radiator 11 and the second radiator 12. The first radiator 11 and the second radiator 12 can be symmetrically arranged with respect to the suspended parasitic branch 2. There are no further restrictions here. The first slit 31 and the second slit 32 are located at both ends of the suspended parasitic branch 2. By bringing the first adjustment line 21 close to the first slit 31, electroparasitism can be generated better. By bringing the second adjustment line 22 close to the second slit 32, magnetic parasitism can be generated better.
[0060] Optionally, in one embodiment of this disclosure, the first radiator 11 and / or the second radiator 12 are formed as an IFA antenna. The first radiator 11 and / or the second radiator 12 are provided with ribs 13. The distance between the rib 13 of the first radiator 11 and the first gap 31, and / or the distance between the rib 13 of the second radiator 12 and the second gap 32, is one-quarter of the wavelength of the radiated wave. This arrangement enables the radiation of high-frequency electromagnetic waves. Furthermore, by combining the first adjustment circuit 21 and the second adjustment circuit 22, different frequency bands can be achieved, such as B1 / B3 / B40 and other mid-to-high frequencies.
[0061] The rib 13 is located at one end of the first radiator 11 and / or the second radiator 12 away from the corresponding first fracture 31 and second fracture 32.
[0062] Optionally, in one embodiment of this disclosure, the feed line 4 includes a third inductor 41, a third capacitor 42, a fourth inductor 43, a fifth inductor 44, and a fourth capacitor 45. The third inductor 41 is grounded. The third capacitor 42 and the fourth inductor 43 are connected in series to form a first line, which is connected in parallel with the third inductor 41. The fifth inductor 44 and the fourth capacitor 45 are connected in parallel and grounded to form a second line, which is connected in series with the first line. This arrangement enables the first radiator 11 to be formed as an IFA antenna. It should be noted that the feed line 4 shown here is one structural form, but other structural forms are also possible, and no further limitations are imposed here.
[0063] Furthermore, this disclosure compares the radiation efficiency of this antenna with that of a technical solution without electrical and magnetic parasitic effects, and the specific results are as follows:
[0064] Frequency band / efficiency Antennas without electrical and magnetic parasitic features The antenna disclosed herein Efficiency improvement difference B3 -3.3 / -4.5 -2.3 / -2.9 1 / 1.7 B1 -2.9 / -4.6 -2.6 / -3.5 0.3 / 0.9 B40 -3 / -3.4 -2.3 / -2.6 0.7 / 0.8 B41 -2.9 / -3.4 -2.3 / -2.8 0.6 / 0.6
[0065] As can be seen from the table above, the antenna disclosed herein achieves a maximum efficiency improvement of 1.7 dB and a minimum average in-band efficiency improvement of 0.6 dB compared to antennas without electrical and magnetic parasitic effects.
[0066] A second aspect of this disclosure also provides a mid-frame assembly including the aforementioned antenna. The antenna may be part of the mid-frame assembly, while the feed line 4, the first adjustment line 21, and the second adjustment line 22 may be disposed on a circuit board.
[0067] A third aspect of this disclosure also provides an electronic device including the antenna described above, or the mid-frame assembly described above.
[0068] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0069] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0070] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. An antenna, characterized in that, Including radiators and suspended parasitic branches; The radiator and the suspended parasitic branch are spaced apart by a gap; The radiator is provided with a power feed point and a grounding point. The power feed point is connected to a power feed line. The suspended parasitic branch is connected to a first adjustment line and a second adjustment line. The first adjustment circuit is configured to adjust the inductance value, and the second adjustment circuit is configured to adjust the capacitance value.
2. The antenna according to claim 1, characterized in that, The first adjustment line and the second adjustment line are respectively close to the two ends of the suspended parasitic branch, and the middle part of the suspended parasitic branch has an equilibrium point. The first adjustment line and the second adjustment line are respectively located on both sides of the equilibrium point.
3. The antenna according to claim 1, characterized in that, The first adjustment circuit includes at least two first inductors, which are connected in parallel. Each first inductor is grounded and can be selectively connected to the suspended parasitic branch.
4. The antenna according to claim 3, characterized in that, The first adjustment circuit also includes at least two first switches, each of which corresponds to a first inductor. Each first switch is connected in series with the corresponding first inductor, and the inductance value is adjusted by controlling the opening and closing of the first switch to control the corresponding first inductor.
5. The antenna according to claim 1, characterized in that, The second adjustment circuit includes at least two first capacitors connected in parallel, each of which is grounded, and the first capacitors can be selectively connected to the suspended parasitic branch.
6. The antenna according to claim 5, characterized in that, The second adjustment circuit also includes at least two second switches, each of which corresponds to one of the first capacitors. Each second switch is connected in series with the corresponding first capacitor, and the opening and closing of the second switch controls the corresponding first capacitor to adjust the capacitance value.
7. The antenna according to claim 1, characterized in that, The radiator includes a first radiator and a second radiator. The first radiator is provided with the feed line, and the second radiator is provided with the grounding point. The fracture includes a first fracture and a second fracture. The first radiator is separated from the suspended parasitic branch by the first fracture, and the second radiator is separated from the suspended parasitic branch by the second fracture.
8. The antenna according to claim 7, characterized in that, The first radiator and the second radiator are disposed on both sides of the suspended parasitic branch, with the first adjustment line close to the first fracture and the second adjustment line close to the second fracture.
9. The antenna according to claim 7, characterized in that, The first radiator and / or the second radiator are formed as an IFA antenna. The first radiator and / or the second radiator are provided with ribs. The distance between the rib of the first radiator and the first gap and / or the distance between the rib of the second radiator and the second gap is one-quarter of the wavelength of the radiated wave.
10. The antenna according to any one of claims 1-9, characterized in that, The power supply line includes a third inductor, a third capacitor, a fourth inductor, a fifth inductor, and a fourth capacitor; The third inductor is grounded; The third capacitor and the fourth inductor are connected in series to form a first circuit, and the first circuit is connected in parallel with the third inductor. The fifth inductor and the fourth capacitor are connected in parallel and grounded to form a second circuit, which is connected in series with the first circuit.
11. A mid-frame assembly, characterized in that, Includes the antenna as described in any one of claims 1-10.
12. An electronic device, characterized in that, Includes the antenna as described in any one of claims 1-10, or the mid-frame assembly as described in claim 11.