Antenna and antenna device
The antenna design addresses 5G NR bandwidth and isolation challenges by generating multiple resonant frequency bands, reducing complexity and cost, and ensuring effective radiation coverage.
Patent Information
- Application Number
- JP2024006792
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2023-02-10
- Filing Date
- 2024-01-19
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2044-01-19
AI Technical Summary
Conventional antennas struggle to meet the high bandwidth and isolation requirements of 5G new radio (5G NR) standards, necessitating complex designs that increase size and cost, while maintaining effective radiation field coverage.
An antenna design comprising a substrate with a ground conductor and an antenna unit featuring a feeder, radiator, and short-circuit conductor, which generates multiple resonant frequency bands through specific length adjustments and resonances, allowing operation in ultra-wide bands without additional components.
The design achieves wide frequency bands (3.1-5.5 GHz) suitable for 5G wireless communication, reduces complexity and cost, and maintains high radiation field coverage (>80%) across key frequency bands.
Smart Images
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Abstract
Description
[Technical Field]
[0001] The present disclosure relates to an antenna and an antenna device. [Background technology]
[0002] Generally, to meet the high demands of the 5G new radio (5G NR) standard in the sub-7 GHz frequency band, antennas must be further designed to handle high operating bandwidths and high isolation between antennas, enabling high data rates and high throughput for multi-input, multi-output (MIMO) systems. In systems prior to the 5G new radio standard, the antenna operating frequency band is relatively small. To meet these bandwidth requirements, conventional antenna designs are sufficient. For example, a typical inverted-F antenna is sufficient. However, achieving the multi-band capabilities of 5G new radio typically requires the design of additional components (e.g., a three-dimensional metal plate structure), which significantly increases overall size and cost. Summary of the Invention
[0003] The present disclosure provides an antenna comprising: a substrate including a first surface and a second surface opposite to the first surface; a ground conductor provided on the first surface and including a ground conductor branch; and an antenna unit provided on the second surface and including a feeder, a radiator, and a short-circuit conductor, wherein the feeder is used to receive a feed-in signal, and a portion of the feeder is projected onto the first surface and overlaps the ground conductor; the radiator includes a first radiating portion and a second radiating portion connected to the first radiating portion; the feeder is connected between the first radiating portion and the second radiating portion, the first radiating portion and the second radiating portion have equal lengths and are both parallel to the ground conductor branch; the short-circuit conductor is connected to the second radiating portion and is connected to the ground conductor via a through hole; the ground conductor branch resonates with the feed-in signal to generate a first frequency band; the first radiating portion and the second radiating portion resonate with the feed-in signal to generate a second frequency band; and the first radiating portion resonates with the feed-in signal to generate a third frequency band.
[0004] The present disclosure relates to a case including a metal plane and a case edge, and a first antenna disposed perpendicular to the metal plane and adjacent to the case edge, the first antenna including a substrate having a first surface and a second surface opposite to the first surface, a ground conductor disposed on the first surface and including a ground conductor branch, and an antenna unit disposed on the second surface and including a feeder, a radiator, and a short-circuit conductor, the feeder being used to receive a feed-in signal and having a portion of the feeder projected onto the first surface overlapping the ground conductor, the radiator including a first radiating portion and a second radiating portion connected to the first radiating portion, the feeder being connected between the first radiating portion and the second radiating portion, the first radiating portion and the second radiating portion having equal lengths and both parallel to the ground conductor branch, the short-circuit conductor being connected to the second radiating portion and connected to the ground conductor via a through hole, and the antenna The present invention further provides an antenna device in which, when the distance between the antenna unit and the metal plane is equal to a predetermined distance, the ground conductor branch resonates with the feed-in signal to generate a first frequency band, the first radiating section and the second radiating section resonate with the feed-in signal to generate a second frequency band, and the first radiating section resonates with the feed-in signal to generate a third frequency band, the first frequency band, the second frequency band, and the third frequency band have first radiation field coverage, second radiation field coverage, and third radiation field coverage, respectively, when the distance between the antenna unit and the metal plane is smaller than the predetermined distance, the first frequency band has a fourth radiation field coverage greater than the first radiation field coverage, and when the distance between the antenna unit and the metal plane is greater than the predetermined distance, the third frequency band has a fifth radiation field coverage greater than the third radiation field coverage. [Brief explanation of the drawings]
[0005] [Figure 1] FIG. 1 is a top perspective view of an antenna according to some embodiments of the present disclosure. [Figure 2] FIG. 1 is a side view of an antenna according to some embodiments of the present disclosure. [Figure 3] FIG. 1 is a top view of an antenna according to some embodiments of the present disclosure. [Figure 4] FIG. 2 is a bottom view of an antenna according to some embodiments of the present disclosure. [Figure 5]FIG. 1 is a top perspective view of an antenna according to some embodiments of the present disclosure. [Figure 6] 1 is a schematic diagram of the operating frequency band (reflection coefficient vs. frequency) of return loss of an antenna according to some embodiments of the present disclosure. [Figure 7] 1 is a schematic diagram of an antenna device according to some embodiments of the present disclosure. [Figure 8] 1 is a schematic diagram of a radiation field generated by an antenna device according to some embodiments of the present disclosure. [Figure 9] FIG. 1 is a schematic diagram of spacing according to some embodiments of the present disclosure. [Figure 10] 1 is a schematic diagram of the location of two antennas in a case according to some embodiments of the present disclosure. [Figure 11] FIG. 10 is a schematic diagram of the location of two antennas in a case according to another embodiment of the present disclosure. [Figure 12] FIG. 10 is a schematic diagram of the location of two antennas in a case according to another embodiment of the present disclosure. [Figure 13] 1 is a schematic diagram of the location of four antennas in a case according to some embodiments of the present disclosure. [Figure 14] 1 is a schematic diagram of the location of eight antennas in a case according to some embodiments of the present disclosure. [Figure 15] 1 is a schematic diagram of distances between four antennas according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION
[0006] Please refer to FIG. 1. FIG. 1 is a top perspective view of an antenna 100 according to some embodiments of the present disclosure, and FIG. 2 is a side view of the antenna 100 according to some embodiments of the present disclosure. As shown in FIG. 1, the antenna 100 includes an antenna unit 110, a substrate 120, and a ground conductor 130. Both the antenna unit 110 and the ground conductor 130 are provided on the substrate 120. In some embodiments, the antenna unit 110 and the ground conductor 130 may be made of a metal material such as copper foil. In some embodiments, the material of the substrate 120 may be a common material used for manufacturing PCBs, such as Teflon (PTFE) or epoxy resin (FR4).
[0007] 2, in this embodiment, the substrate 120 has a first surface S1 and a second surface S2 opposite to the first surface S1. The ground conductor 130 is provided on the first surface S1. The antenna unit 110 is provided on the second surface S2. The antenna unit 110 is connected to the ground conductor 130 via the substrate 120 by a through hole VIA.
[0008] Please also refer to FIG. 3 , which is a top view of the antenna 100 according to some embodiments of the present disclosure. As shown in FIG. 3 , when the antenna 100 is viewed in a plan view in the y direction, the antenna unit 110 on the second surface S2 includes a radiator RB, a feed body FIB, and a shorting conductor SCP. The radiator RB includes a first radiating portion RP1 and a second radiating portion RP2 connected to the first radiating portion RP1. The feed body FIB is connected between the first radiating portion RP1 and the second radiating portion RP2, and the first radiating portion RP1 and the second radiating portion RP2 have equal lengths. The feed body FIB is used to receive a feed-in signal (i.e., the feed-in signal is a received radio signal). The shorting conductor SCP is connected to the second radiating portion RP2. In some embodiments, the feed body FIB may include a feed-in point FP available for receiving the feed-in signal. In some embodiments, the shorting conductor SCP may include a via hole VIA and be connected to the ground conductor 130 via the substrate 120 by the via hole VIA. In other words, the antenna unit 110 has an inverted-F antenna structure.
[0009] In some embodiments, the substrate 120 may include a first substrate edge SED1, a second substrate edge SED2, a third substrate edge SED3, and a fourth substrate edge SED4. The first substrate edge SED1 may be perpendicular to the second substrate edge SED2 and the third substrate edge SED3, and the first substrate edge SED1 may be parallel to the fourth substrate edge SED4.
[0010] In some embodiments, the distance between the radiator RB and the first substrate edge SED1 is much smaller than the distance between the radiator RB and the fourth substrate edge SED4. In other words, the radiator RB may be close to the first substrate edge SED1. In some embodiments, the distance between the shorting conductor SCP and the second substrate edge SED2 is much smaller than the distance between the shorting conductor SCP and the third substrate edge SED3. In other words, the shorting conductor SCP may be close to the second substrate edge SED2.
[0011] In some embodiments, the installation direction of the radiator RB may be parallel to the first substrate edge SED1 and the fourth substrate edge SED4, and may be perpendicular to the second substrate edge SED2 and the third substrate edge SED3. In some embodiments, the installation direction of the shorting conductor SCP may be parallel to the second substrate edge SED2 and the third substrate edge SED3, and may be perpendicular to the first substrate edge SED1 and the fourth substrate edge SED4.
[0012] In some embodiments, the power source FIB may include a first feed-in portion FIP1 and a second feed-in portion FIP2, where the first feed-in portion FIP1 is connected to the second feed-in portion FIP2 and the second feed-in portion FIP2 is connected between the first radiating portion RP1 and the second radiating portion RP2, and the first feed-in portion FIP1 and the second feed-in portion FIP2 are perpendicular to each other. In some embodiments, the first feed-in portion FIP1 may include a feed-in point FP and receive a feed-in signal through the feed-in point FP. In some embodiments, the installation direction of the first feed-in portion FIP1 may be parallel to the first substrate edge portion SED1 and the fourth substrate edge portion SED4 and perpendicular to the second substrate edge portion SED2 and the third substrate edge portion SED3. In some embodiments, the installation direction of the second feed-in part FIP2 may be parallel to the second substrate edge SED2 and the third substrate edge SED3, and may be perpendicular to the first substrate edge SED1 and the fourth substrate edge SED4.
[0013] Please also refer to FIG. 4 , which is a bottom view of the antenna 100 according to some embodiments of the present disclosure. As shown in FIG. 4 , when the antenna 100 is viewed from the bottom in the −y direction, the ground conductor 130 on the first surface S1 includes a ground conductor branch GBP (i.e., the ground conductor branch GBP is part of the strip-shaped portion of the ground conductor 130). In some embodiments, the ground conductor 130 may include a slot hole SL. In some embodiments, the distance between the end of the ground conductor branch GBP and the second substrate edge SED2 is much greater than the distance between the end of the ground conductor branch GBP and the third substrate edge SED3. In other words, the ground conductor branch GBP may be close to the third substrate edge SED3. In some embodiments, the installation direction of the ground conductor branch GBP may be parallel to the first substrate edge SED1 and the fourth substrate edge SED4, and perpendicular to the second substrate edge SED2 and the third substrate edge SED3.
[0014] Please also refer to FIG. 5 , which is a top perspective view of the antenna 100 according to some embodiments of the present disclosure. As shown in FIG. 5 , a projection of the feed body FIB onto the first surface S1 overlaps the ground conductor 130 (i.e., a portion of the feed body FIB is located in the Y-axis direction of the ground conductor 130). In some embodiments, a projection of the first feed-in portion FIP1 of the feed body FIB onto the first surface S1 may overlap the ground conductor 130, and a projection of a portion of the second feed-in portion FIP2 of the feed body FIB onto the first surface S1 may overlap the ground conductor 130. In some embodiments, a projection of a portion of the short-circuit conductor SCP onto the first surface S1 may overlap the ground conductor 130.
[0015] In this embodiment, the first radiating portion RP1 and the second radiating portion RP2 are parallel to the ground conductor branch GBP. In some embodiments, the projections of the first radiating portion RP1 and the second radiating portion RP2 onto the first surface S1 may not overlap the ground conductor 130, the projections of another portion of the second feed-in portion FIP2 onto the first surface S1 may not overlap the ground conductor 130, and the projections of another portion of the short-circuiting conductor SCP onto the first surface S1 may not overlap the ground conductor 130. In some embodiments, the projections of a portion of the first feed-in portion FIP1 onto the first surface S1 may overlap a slot hole SL in the ground conductor 130, and the width of the portion of the first feed-in portion FIP1 may be smaller than the width of the other portion of the first feed-in portion FIP1. This arrangement can be considered a matching circuit, with the antenna impedance approaching 50 ohms at the feed-in point.
[0016] In this embodiment, the ground conductor branch GBP resonates with the feed-in signal to generate a first frequency band, the first radiating portion RP1 and the second radiating portion RP2 resonate with the feed-in signal to generate a second frequency band, and the first radiating portion RP1 resonates with the feed-in signal to generate a third frequency band. In some embodiments, the third frequency band is greater than the second frequency band, and the second frequency band is greater than the first frequency band. In other words, the resonance of the ground conductor branch GBP allows the antenna 100 to operate in a low frequency band, the resonance of the first radiating portion RP1 and the second radiating portion RP2 allows the antenna 100 to operate in a medium frequency band, and the resonance of the first radiating portion RP1 allows the antenna 100 to operate in a high frequency band (e.g., the center frequency of the low frequency band (i.e., the first frequency band) may be 3.3 GHz, the center frequency of the medium frequency band (i.e., the second frequency band) may be 4.2 GHz, and the center frequency of the high frequency band (i.e., the third frequency band) may be 5 GHz). In other words, such a structure generates an ultra-wideband (for example, 3.2 GHz to 5.5 GHz) through resonance.
[0017] In some embodiments, the length P of the ground conductor branch GBP may be one-quarter of the wavelength of the first frequency band. In some embodiments, the length M of the first radiating portion RP1 and the length M of the second radiating portion RP2 are both one-eighth of the wavelength of the second frequency band. In some embodiments, there is a minimum distance N between the projection of the first radiating portion RP1 onto the first surface S1 and the ground conductor branch GBP (i.e., there is a minimum distance N in the Z-axis direction between the first radiating portion RP1 and the ground conductor branch GBP), and the length of the minimum distance N is the difference between one-quarter of the wavelength of the third frequency band and one-eighth of the wavelength of the second frequency band. In other words, depending on the needs of the antenna's operating frequency band, the length P of the ground conductor branch GBP, the length M of the first radiating portion RP1, the length M of the second radiating portion RP2, and the minimum distance N may be adjusted so that the antenna 100 can operate in the desired frequency band.
[0018] It should be noted that in some embodiments, if the existing distance is less than the minimum distance N, the antenna will not be able to achieve the need to operate in the desired frequency band.
[0019] Please also refer to FIG. 6, which is a schematic diagram of the operating frequency band (reflection coefficient (s-parameter) vs. frequency) of the return loss of antenna 100 according to some embodiments of the present disclosure. As shown in FIG. 6, with a baseline BL of -10 dB, the operating frequency band generated by the above-described configuration of antenna 100 through resonance is 3.1 to 5.5 GHz. In other words, antenna 100 can generate an ultra-wideband through resonance that meets the operating frequency band requirements of antennas in the fifth generation wireless communication technology.
[0020] According to the antenna 100, three resonant frequency bands can be generated by the resonance of the inverted-F antenna 100 and the ground conductor 130 with the ground conductor branch GBP. This significantly increases the operating frequency band of the antenna 100, thereby solving the problem of the limited operating frequency band of conventional antennas for fifth-generation wireless communication technology. Furthermore, by adjusting the length P of the ground conductor branch GBP, the length M of the first radiating portion RP1, the length M of the second radiating portion, and the minimum distance N according to the operating frequency band needs, the requirement that the antenna operate in the required frequency band can be easily and quickly achieved.
[0021] Please also refer to FIG. 7. FIG. 7 is a schematic diagram of an antenna device 200 according to some embodiments of the present disclosure. As shown in FIG. 7, the antenna device 200 includes an antenna 100 and a case CS. The case CS includes a metal plane MP and a case edge EF. The antenna 100 is disposed perpendicular to the metal plane MP, and the antenna 100 is adjacent to the case edge EF. In other words, the entire plane of the antenna unit 110, the substrate 120, and the ground conductor 130 (i.e., the normal direction ANL is the x-direction) is perpendicular to the entire metal plane MP (i.e., the normal direction MNL is the z-direction), the antenna unit 110, the substrate 120, and the ground conductor 130 are adjacent to the case edge EF, and the substrate 120 is fixed to the metal plane MP. In some embodiments, the substrate 120 may be directly fixed to the metal plane MP using a fixture FT. In some embodiments, the case CS may be made of any metallic material. The antenna 100 provided in the case CS has the same structure as the antenna 100 shown in FIGS. 1 to 5, and therefore a description thereof will be omitted here.
[0022] Please also refer to FIG. 8. FIG. 8 is a schematic diagram of a radiation field RP generated by an antenna device 200 according to some embodiments of the present disclosure. As shown in FIG. 8, the normal direction of the metal plane MP of the case CS is the z direction, and the antenna 100 generates a radiation field RP that approximates a hemisphere in the z direction. With the +Z direction as the reference (i.e., 0 degrees), the radiation field RP is concentrated at a planar angle of 82.5 degrees to -82.5 degrees. In other words, the coverage area of the radiation field generated by the antenna device 200 is between ±82.5 degrees. This shows that the antenna device 200 not only has an extremely wide operating frequency band but also maintains an extremely good radiation field coverage. For example, the radiation field coverage area of the region of interest, i.e., between ±82.5 degrees, with a directivity of >0 dBi, reaches 80% or more.
[0023] Please also refer to Figure 9, which is a schematic diagram of the gap Z according to some embodiments of the present disclosure. As shown in Figure 9, the ground conductor 130 in the antenna 100 has a ground edge GED close to the case CS, and there is a gap Z between the ground edge GED and the case CS. In other words, the minimum distance between the ground edge GED and the case CS is the gap Z.
[0024] In this embodiment, when the spacing Z is equal to the predetermined distance, the ground conductor branch GBP resonates with the feed-in signal to generate a first frequency band, the first radiating portion RP1 and the second radiating portion RP2 resonate with the feed-in signal to generate a second frequency band, and the first radiating portion RP1 resonates with the feed-in signal to generate a third frequency band. When the spacing Z is equal to the predetermined distance, a good radiation field coverage (i.e., greater than 80%) is achieved for the 3.3-5 GHz frequency band. Furthermore, the first, second, and third frequency bands all have radiation field coverages greater than 80%. The first, second, and third frequency bands have first, second, and third radiation field coverages, respectively, and all of the first, second, and third radiation field coverages are greater than 80%. When the spacing Z is smaller than the predetermined distance, an optimized radiation field coverage (i.e., a high radiation field coverage) is achieved for the n78 frequency band (first frequency band). Furthermore, the first frequency band has a fourth radiation field coverage that is greater than the first radiation field coverage. When the spacing Z is greater than the predetermined distance, the n79 frequency band (third frequency band) has an optimized radiation field coverage (i.e., a high radiation field coverage). Furthermore, the third frequency band has a fifth radiation field coverage that is greater than the third radiation field coverage.
[0025] For example, assuming that the predetermined distance is preset to 8.1 mm, the antenna 100 in the antenna device 200 can resonate to generate a first frequency band of 3.3 GHz, a second frequency band of 4.2 GHz, and a third frequency band of 5 GHz, thereby meeting the requirements of the n78 (or n77) and n79 frequency bands of the fifth generation wireless communication technology, with an angle between ±82.5 degrees, and each frequency band also has good radiation field coverage (about 80%).
[0026] When the spacing Z is adjusted to 5.1 mm, the antenna 100 in the antenna device 200 can resonate to generate a first frequency band of 3.3 GHz, a second frequency band of 4.2 GHz, and a third frequency band of 5 GHz, which can meet the needs of the n78 and n79 frequency bands of the fifth generation wireless communication technology. For the n78 frequency band, the angle is between ±82.5 degrees and has an optimized radiation field coverage (about 89%).
[0027] When the spacing Z is adjusted to 13.1 mm, the antenna 100 in the antenna device 200 can resonate to generate a first frequency band of 3.3 GHz, a second frequency band of 4.2 GHz, and a third frequency band of 5 GHz, which can meet the needs of the n78 and n79 frequency bands of the fifth generation wireless communication technology. For the n79 frequency band, the angle is between ±82.5 degrees and has an optimized radiation field coverage (about 87%).
[0028] In the above example, one antenna 100 is provided in the case CS, but in actual applications, the case CS may be provided with one or more antennas 100. Below, an example will be described in which multiple antennas 100 are provided in the case CS.
[0029] Please also refer to FIG. 10, which is a schematic diagram of the positions of two antennas 100(1) to 100(2) in a case according to some embodiments of the present disclosure. As shown in FIG. 10, an antenna device 200 includes antennas 100(1) to 100(2) and a case CS. The antennas 100(1) to 100(2) in the antenna device 200 may be arranged parallel to each other on a metal plane MP, and the antennas 100(1) to 100(2) may all be close to a case edge EF. The angle between the normal directions NL1 and NL2 of the planes of the antennas 100(1) to 100(2) is 180 degrees.
[0030] Please also refer to FIG. 11. FIG. 11 is a schematic diagram of the positions of two antennas 100(1) to 100(2) in a case according to another embodiment of the present disclosure. As shown in FIG. 11, an antenna device 200 includes antennas 100(1) to 100(2) and a case CS. The antennas 100(1) to 100(2) in the antenna device 200 may be arranged parallel to each other on a metal plane MP, with the antenna 100(1) being close to the antenna 100(2), and all of the antennas 100(1) to 100(2) being close to the case edge EF. The angle between the normal directions NL1 and NL2 of the planes of the antennas 100(1) to 100(2) is 0 degrees.
[0031] Please also refer to FIG. 12. FIG. 12 is a schematic diagram of the positions of two antennas 100(1) to 100(2) in a case according to another embodiment of the present disclosure. As shown in FIG. 12, an antenna device 200 includes antennas 100(1) to 100(2) and a case CS. The antennas 100(1) to 100(2) in the antenna device 200 may be disposed perpendicular to each other on a metal plane MP, with the antenna 100(1) being close to the antenna 100(2), and all of the antennas 100(1) to 100(2) being close to the case edge EF. The angle between the normal directions NL1 and NL2 of the planes of the antennas 100(1) to 100(2) is 90 degrees.
[0032] Please also refer to FIG. 13. FIG. 13 is a schematic diagram of the positions of four antennas 100(1) to 100(4) in a case according to some embodiments of the present disclosure. As shown in FIG. 13, an antenna device 200 includes antennas 100(1) to 100(4) and a case CS. The antennas 100(1) to 100(2) in the antenna device 200 may be disposed perpendicular to each other on a metal plane MP, with the antenna 100(1) being adjacent to the antenna 100(2), and all of the antennas 100(1) to 100(2) being adjacent to the case edge EF. The angle between the normal directions NL1 to NL2 of the planes of the antennas 100(1) to 100(2) is 90 degrees.
[0033] Furthermore, the antennas 100(2) to 100(3) in the antenna device 200 may be provided parallel to each other on a metal plane MP, with the antenna 100(2) being close to the antenna 100(3), and the antennas 100(2) to 100(3) being close to the case edge EF. The angle between the normal directions NL2 to NL3 of the respective planes of the antennas 100(2) to 100(3) is 0 degrees.
[0034] Furthermore, the antennas 100(3) to 100(4) in the antenna device 200 may be provided perpendicular to each other on the metal plane MP, with the antenna 100(3) being close to the antenna 100(4), and the antennas 100(3) to 100(4) being close to the case edge EF. The angle between the normal directions NL3 to NL4 of the respective planes of the antennas 100(3) to 100(4) is 90 degrees.
[0035] Furthermore, the antennas 100(1) and 100(4) in the antenna device 200 may be provided parallel to each other on a metal plane MP, and both the antennas 100(1) and 100(4) may be close to the case edge EF. The angle between the normal directions NL1 to NL4 of the respective planes of the antennas 100(1) and 100(4) is 180 degrees.
[0036] Please also refer to FIG. 14. FIG. 14 is a schematic diagram of the positions of eight antennas 100(1) to 100(8) in a case according to some embodiments of the present disclosure. As shown in FIG. 14, an antenna device 200 includes antennas 100(1) to 100(8) and a case CS. The installation method of the antennas 100(1) to 100(4) is the same as the installation method of the antennas 100(1) to 100(4) in FIG. 13. Furthermore, with respect to the line segment LN as a reference, the antennas 100(8) to 100(5) are installed as mirror images based on the installation method of the antennas 100(1) to 100(4).
[0037] The distance between the antennas will be described below using an example. Please also refer to FIG. 15. FIG. 15 is a schematic diagram of the distances A and B between four antennas 100(1) to 100(4) according to some embodiments of the present disclosure. As shown in FIG. 15, the distance A between the feed-in point FP(1) of antenna 100(1) and the feed-in point FP(2) of antenna 100(2) is 53.49 mm, the distance B between the feed-in point FP(2) of antenna 100(2) and the feed-in point FP(3) of antenna 100(3) is 133.5 mm, and the distance A between the feed-in point FP(3) of antenna 100(3) and the feed-in point FP(4) of antenna 100(4) is 53.49 mm.
[0038] All of the above antenna installation methods can satisfy the requirement that the isolation be greater than 20 dB.
[0039] In summary, the antenna and antenna device disclosed herein can generate a wide frequency band through resonance to match the operating frequency band of fifth-generation wireless communication technology. Furthermore, the antenna and antenna device disclosed herein can match the operating frequency band of fifth-generation wireless communication technology using only a simple inverted-F antenna, eliminating the need for a complex antenna, which significantly reduces antenna costs. Furthermore, the required operating frequency band can be adjusted by adjusting the length of the antenna's radiator or the length of the ground conductor branch of the ground conductor, which significantly improves the convenience of antenna design. Furthermore, the antenna and antenna device disclosed herein can optimize the radiation field coverage of the main radiation area for the frequency band of interest.
[0040] Although the present disclosure has been disclosed above based on the examples, the examples do not limit the present disclosure, and a person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure is based on that defined in the appended claims. [Explanation of symbols]
[0041] 100, 100(1)~100(8) Antenna 200 Antenna device 110 Antenna Unit 120 boards 130 Grounding Conductor S1 1st surface S2 2nd surface VIA through hole SED1 First board edge SED2 Second board edge SED3 Third board edge SED4 4th board edge RP1 1st radiation part RP2 Second Radiation Section RB emitter FIP1 First Feed-in Section FIP2 2nd feed-in section FIB feeder FP Feed-in Point SCP Shorting Conductor SL slot hole GBP Ground Conductor Branch M, P length N minimum distance Z spacing CS Case EF Case edge MP metal plane FT jig ANL, MNL, NL1~NL4 Normal direction RP radiation field LN Line A, B distance BL Baseline GED Ground Edge
Claims
1. a substrate including a first surface and a second surface opposite the first surface; a ground conductor provided on the first surface and including a ground conductor branch; an antenna unit provided on the second surface, the antenna unit including a feeder, a radiator, and a short-circuit conductor; Equipped with the power feeder is used to receive a feed-in signal, and a part of the power feeder is located in a Y-axis direction perpendicular to the ground conductor; the radiator includes a first radiating portion and a second radiating portion connected to the first radiating portion, the feeder is connected between the first radiating portion and the second radiating portion, the first radiating portion and the second radiating portion have the same length and are both parallel to the ground conductor branch, the short-circuit conductor is connected to the second radiating portion and is connected to the ground conductor via a through hole; an antenna, wherein the ground conductor branch resonates with the feed-in signal to generate a first frequency band, the first radiating portion and the second radiating portion resonate with the feed-in signal to generate a second frequency band, and the first radiating portion resonates with the feed-in signal to generate a third frequency band, and the short-circuit conductor is connected to a portion of the ground conductor other than the ground conductor branch.
2. 2. The antenna of claim 1, wherein the third frequency band is greater than the second frequency band, and the second frequency band is greater than the first frequency band.
3. 2. The antenna of claim 1, wherein the length of the ground conductor branch is one-quarter of a wavelength of the first frequency band.
4. 2. The antenna according to claim 1, wherein the length of the first radiating portion and the length of the second radiating portion are both one-eighth of a wavelength of the second frequency band.
5. 2. The antenna according to claim 1, wherein a minimum distance exists in the Z-axis direction between the first radiating portion and the ground conductor branch, and the length of the minimum distance is a difference between one-fourth of a wavelength of the third frequency band and one-eighth of a wavelength of the second frequency band.
6. a case including a metal plane and a case edge; a first antenna disposed perpendicular to the metal plane and adjacent to the edge of the case; Equipped with The first antenna is a substrate including a first surface and a second surface opposite the first surface; a ground conductor provided on the first surface, the ground conductor including a ground conductor branch and having a ground edge adjacent to the case, the ground edge being spaced apart from the case; an antenna unit provided on the second surface, the antenna unit including a feeder, a radiator, and a short-circuit conductor; Including, the power feeder is used to receive a feed-in signal, and a part of the power feeder is located in a Y-axis direction perpendicular to the ground conductor; the radiator includes a first radiating portion and a second radiating portion connected to the first radiating portion, the feeder is connected between the first radiating portion and the second radiating portion, the first radiating portion and the second radiating portion have the same length and are both parallel to the ground conductor branch, the short-circuiting conductor is connected to the second radiating portion and to the ground conductor via a through hole, and the short-circuiting conductor is connected to a portion of the ground conductor other than the ground conductor branch. When a distance between the antenna unit and the metal plane is equal to a predetermined distance, the ground conductor branch resonates with the feed-in signal to generate a first frequency band, the first radiating portion and the second radiating portion resonate with the feed-in signal to generate a second frequency band, and the first radiating portion resonates with the feed-in signal to generate a third frequency band, and the first frequency band, the second frequency band, and the third frequency band have a first radiation pattern coverage, a second radiation pattern coverage, and a third radiation pattern coverage, respectively; When the distance between the antenna unit and the metal plane is smaller than the predetermined distance, the first frequency band has a fourth radiation pattern coverage that is greater than the first radiation pattern coverage; An antenna device, wherein the third frequency band has a fifth radiation pattern coverage that is greater than the third radiation pattern coverage when the distance between the antenna unit and the metal plane is greater than the predetermined distance.
7. The antenna device according to claim 6 , wherein the third frequency band is greater than the second frequency band, and the second frequency band is greater than the first frequency band.
8. The antenna device according to claim 6 , further comprising a second antenna having the same structure as the first antenna, wherein the substrate of the first antenna and the substrate of the second antenna are parallel to each other or perpendicular to each other.
9. 9. The antenna device according to claim 8, wherein isolation between the first antenna and the second antenna is greater than 23 dB.
10. 9. The antenna device according to claim 8, wherein the radiation patterns of the first antenna and the second antenna approximate a hemisphere, and the radiation pattern coverage of the first antenna and the second antenna is greater than 80%.
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