An antenna applied in a foldable electronic device

Abstract

The application provides an antenna applied to a foldable electronic device, which comprises a first antenna substrate, a second antenna substrate hinged to the first antenna substrate through a hinge, the first antenna substrate and the second antenna substrate can rotate around the hinge and switch between a folded state and an unfolded state, and in the folded state, the first antenna substrate, the hinge and the second antenna substrate form a rectangular resonant cavity structure; the first antenna substrate is provided with a first antenna, and the second antenna substrate is provided with a second antenna coupled with the first antenna. Through the second antenna as a parasitic branch, the radiation aperture is expanded, the radiation efficiency and the total system efficiency of the antenna are effectively improved, the S parameter performance is improved, and in the unfolded state, the parasitic branch does not cause too much influence. Through the synergistic effect of electromagnetic coupling and a matching circuit, the total system efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to an antenna used in foldable electronic devices. Background Technology

[0002] With the development of technology, foldable electronic devices are becoming increasingly popular, especially smartphones and tablets. The biggest advantage of these devices is that they can easily transform from large screens into compact, portable forms, meeting diverse user needs. However, traditional antenna designs often cannot adapt well to this foldable form factor because they may experience performance degradation during folding, as the antenna's radiation pattern and efficiency are affected by the device's folding shape.

[0003] In foldable electronic devices, antennas typically need to operate across multiple frequency bands within a limited space, while also considering electromagnetic compatibility under different device configurations. Furthermore, as users demand higher device performance, antennas must maintain efficient and stable signal transmission capabilities under varying usage conditions.

[0004] In existing foldable electronic devices, the performance of the entire device in its fully folded state is affected by the following three factors:

[0005] (1) For the LB band of mobile phone antenna, the metal ground plane is an important component of the antenna radiator. However, from the fully unfolded state to the fully folded state, the metal ground plane that directly participates in radiation is reduced by half, thus reducing the radiation efficiency.

[0006] (2) When fully folded, the metal ground part of the second antenna will partially block the first antenna radiator, thus affecting the antenna's radiating aperture.

[0007] (3) In the fully folded state, the metal ground part of the first antenna and the second antenna and the intermediate hinge will form a rectangular resonant cavity structure. Taking the LB band as an example, the resonant cavity TE(0.500) mode is formed in the frequency band, which will interfere with the S-parameter (i.e. scattering parameter), radiation efficiency and system efficiency. Taking the MHB band as an example, the resonant cavity TE(200), TE(210) and other higher-order modes are formed in the frequency band, which will also interfere with its various performance indicators. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an antenna for use in foldable electronic devices, which solves the problem of performance degradation in traditional antenna designs in the prior art.

[0009] To achieve the above and other related objectives, the present invention provides the following technical solution:

[0010] An antenna for use in foldable electronic devices includes a first antenna substrate and a second antenna substrate hinged to the first antenna substrate. Both the first antenna substrate and the second antenna substrate can rotate around the hinge and switch between folded and unfolded states. In the folded state, the first antenna substrate, the hinge, and the second antenna substrate form a rectangular resonant cavity structure. A first antenna is provided on the first antenna substrate, and a second antenna coupled to the first antenna is provided on the second antenna substrate.

[0011] To achieve the above technical solution, the antenna system of the present invention consists of a first antenna substrate and a second antenna substrate, which are connected by a hinge, allowing the two substrates to rotate around the hinge to adapt to the folded and unfolded states of the device. In the folded state, the second antenna, as a parasitic branch of the first antenna, interacts with the first antenna through electromagnetic coupling and participates in the antenna's radiation process. By utilizing the second antenna as a parasitic branch in the folded state, the radiation aperture is expanded. In the fully folded state, the design of the second antenna effectively improves the antenna's radiation efficiency and the overall system efficiency, and improves the S-parameter performance. Furthermore, in the unfolded state, these parasitic branches do not cause significant impact. The present invention achieves an improvement in the overall system efficiency through the synergistic effect of electromagnetic coupling and matching circuitry.

[0012] In one embodiment of the present invention, the first antenna substrate includes a first base plate and a first side plate perpendicularly disposed in the circumferential direction of the first base plate, and the second antenna substrate includes a second base plate and a second side plate perpendicularly disposed in the circumferential direction of the second base plate; the outer sides of the first base plate and the second base plate are covered with a metal ground plate, and the outer sides of the first side plate, the second side plate and the hinge are covered with metal patches, and the metal patches and the metal ground plate are always electrically connected.

[0013] To achieve the above technical solution, the vertical arrangement of the first base plate and the first side plate, and the second base plate and the second side plate forms a structural support. The outer sides of the first base plate and the second base plate are covered with a metal floor, while the outer sides of the side plates and the hinges are covered with metal patches. These metal components provide the radiation and reflection surfaces required by the antenna. An electrical connection is maintained between the metal patches and the metal floor, ensuring a continuous electromagnetic field distribution for the antenna in both unfolded and folded states.

[0014] In one embodiment of the present invention, the first antenna includes an IFA antenna and a T antenna, with a slot between the IFA antenna and the T antenna. The T antenna is connected to a first transmission line for power feeding, and an inductor connected in parallel to the metal ground plane is connected to the first transmission line. The IFA antenna is powered through a second transmission line connected to the metal ground plane. Matching elements are connected in series or in parallel on both the first and second transmission lines. A capacitor probe is connected to the matching element of the second transmission line. A plurality of switching elements are provided at the slot, and a voltage probe is connected to the switching elements.

[0015] To achieve the above technical solution, the IFA antenna and T antenna are separated by a slit to reduce mutual interference and optimize performance. The T antenna is fed through a first transmission line, which has an inductor connected in parallel to a metal ground plane. This configuration helps adjust the antenna's resonant frequency and impedance matching. The IFA antenna is fed through a second transmission line connected to the metal ground plane. This design allows the IFA antenna to utilize the metal ground plane as a reflector, enhancing signal radiation efficiency. Matching elements are connected in series or parallel on both the first and second transmission lines. These elements are used to adjust the antenna's impedance to ensure effective signal transmission. Capacitor probes are connected to the matching elements on the second transmission line, allowing for fine impedance adjustment and frequency tuning. Several switching elements are located at the slit. These switching elements are used to control the signal transmission path or switch modes to adapt to different communication needs. Voltage probes are located on the switching elements to monitor and control their operating status, ensuring the stability and performance of the antenna system under different operating conditions. The unique design of the switching elements and voltage probes allows the antenna to maintain good signal transmission capability even in a folded state, enhancing the device's portability and practicality.

[0016] In one embodiment of the present invention, the second antenna includes a first parasitic antenna coupled to the T antenna and a second parasitic antenna coupled to the IFA antenna. A gap is provided between the first parasitic antenna and the second parasitic antenna, and the first parasitic antenna and the second parasitic antenna are respectively grounded.

[0017] To achieve the above technical solution, the radiation performance of the main antenna can be enhanced by coupling the first and second parasitic antennas with the main antenna (T antenna and IFA antenna). This coupling effect can improve the antenna's gain and directivity, thereby improving communication quality. A gap is provided between the first and second parasitic antennas, a design that helps reduce mutual interference between the two parasitic antennas and adjusts the antenna's resonant frequency. The first and second parasitic antennas are grounded separately, which helps improve the antenna's radiation efficiency and reduce signal loss. The presence of the parasitic antennas can change the resonant frequency of the entire antenna system. By adjusting the length, position, and shape of the parasitic antennas, the antenna's operating frequency can be precisely controlled to meet the needs of multi-band communication.

[0018] In one embodiment of the present invention, both the T-antenna and the first parasitic antenna are L-shaped structures.

[0019] To achieve the above technical solution, the L-shaped structure can effectively utilize space, especially in foldable electronic devices. This design helps to realize antenna functionality within a limited space. The resonant frequency of the L-shaped antenna can be controlled by adjusting the lengths of the two conductive parts. This adjustment helps the antenna operate within a specific frequency range to meet communication requirements.

[0020] In one embodiment of the present invention, both the first antenna substrate and the second antenna substrate are FR-4 dielectric substrates with a dielectric constant of 4.3.

[0021] To achieve the above technical solution, the FR-4 dielectric substrate with a dielectric constant of 4.3 has good mechanical properties and its electrical properties remain stable over a wide temperature range. This is very important for the performance stability of foldable electronic devices in different environments. The dielectric constant has a significant impact on the size and performance of the antenna because it determines the propagation speed of electrical signals in the medium, thereby affecting the resonant frequency and impedance matching of the antenna.

[0022] In one embodiment of the present invention, the thickness of the first base plate, the second base plate and the hinge is 0.8 mm; the thickness of the first side plate and the second side plate is 0.5 mm; and the thickness of the metal floor and the metal patch is 0.02 mm.

[0023] To achieve the above technical solution, by specifying the precise thickness of each component, the antenna design ensures structural stability and reliability in the foldable device. This is crucial for maintaining antenna performance and the overall durability of the device. The thinness of the metal ground plane and metal patch helps to provide good electromagnetic compatibility, reduce interference between internal components, and also provides a certain degree of protection against external electromagnetic interference.

[0024] In one embodiment of the present invention, the IFA antenna is an IFA antenna in the LB band, and the T antenna is a T antenna in the MHB band.

[0025] To achieve the above technical solution, the IFA antenna is designated as an IFA antenna in the LB band, while the T antenna is designated as a T antenna in the MHB band. This design allows the antennas to cover different frequency bands to adapt to different communication needs.

[0026] As described above, an antenna of the present invention, applied in a foldable electronic device, has the following beneficial effects:

[0027] 1. The antenna design of this invention, by combining an IFA antenna and a T antenna, achieves coverage of the LB and MHB frequency bands, meeting the needs of modern electronic devices for multi-band communication.

[0028] 2. The antenna design allows for good performance in both folded and unfolded states, enabling foldable electronic devices to provide stable communication capabilities in different usage states.

[0029] 3. By designing a parasitic antenna and using switching elements, the radiation aperture is expanded, effectively improving the antenna's radiation efficiency and the overall system efficiency, enhancing the performance of S-parameters, and further improving communication quality.

[0030] 4. Through precise transmission line design and the application of matching components, impedance matching of the antenna is achieved, ensuring effective signal transmission and minimal reflection, thereby improving the overall system efficiency.

[0031] 5. A second antenna radiator that does not require power feeding is designed in the second antenna substrate area, which effectively solves the problem of the deterioration of various antenna performance indicators in the fully folded state, so that the device can achieve good performance in both the unfolded and fully folded states. Attached Figure Description

[0032] Figure 1 The diagram shows the structure of the present invention in its unfolded state.

[0033] Figure 2 This is another structural schematic diagram showing the invention in its unfolded state.

[0034] Figure 3 Displayed as Figure 1 A magnified view of a portion of point A in the middle.

[0035] Figure 4 The diagram shows a schematic of the antenna structure of a foldable electronic device in the prior art.

[0036] Figure 5 This is a schematic diagram of another antenna structure for foldable electronic devices in the prior art.

[0037] Figure 6 For the present invention in Figure 1 A schematic diagram of S-parameters in the state.

[0038] Figure 7 For the present invention in Figure 1 Schematic diagram of radiation efficiency and system efficiency under certain conditions.

[0039] Figure 8 For the present invention in Figure 1 Comparison when fully folded Figure 4 Schematic diagram of S-parameters when fully folded.

[0040] Figure 9 For the present invention in Figure 1 Comparison when fully folded Figure 4 Schematic diagram of LB band radiation efficiency and system efficiency when fully folded.

[0041] Figure 10 For the present invention in Figure 1 Comparison when fully folded Figure 4 Schematic diagram of MHB band radiation efficiency and system efficiency when fully folded.

[0042] Component designation explanation

[0043] 1. Hinge; 2. First base plate; 3. First side plate; 4. Second base plate; 5. Second side plate; 6. IFA antenna; 7. T antenna; 8. First transmission line; 9. Inductor; 10. Second transmission line; 11. Matching element; 12. Capacitor probe; 13. Switching element; 14. Voltage probe; 15. First parasitic antenna; 16. Second parasitic antenna; 17. Notch. Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0045] Please see Figures 1 to 3 The present invention provides an antenna for use in foldable electronic devices, including a first antenna substrate and a second antenna substrate hinged to the first antenna substrate by a hinge 1. Both the first antenna substrate and the second antenna substrate can rotate around the hinge 1 and switch between folded and unfolded states. In the folded state, the first antenna substrate, the hinge 1 and the second antenna substrate form a rectangular resonant cavity structure. The first antenna substrate is provided with a first antenna, and the second antenna substrate is provided with a second antenna coupled to the first antenna.

[0046] The antenna system of this invention consists of a first antenna substrate and a second antenna substrate, which are connected by a hinge 1, allowing the two substrates to rotate around the hinge 1 to accommodate the folded and unfolded states of the device. In the folded state, the second antenna, as a parasitic branch of the first antenna, interacts with the first antenna through electromagnetic coupling and participates in the antenna's radiation process. By utilizing the second antenna as a parasitic branch in the folded state, the radiation aperture is expanded. In the fully folded state, the design of the second antenna effectively improves the antenna's radiation efficiency and the overall system efficiency, and improves the S-parameter performance. Furthermore, in the unfolded state, these parasitic branches do not cause significant impact. This invention achieves an improvement in the overall system efficiency through the synergistic effect of electromagnetic coupling and matching circuitry.

[0047] The first antenna substrate includes a first base plate 2 and a first side plate 3 vertically disposed around the first base plate 2. The second antenna substrate includes a second base plate 4 and a second side plate 5 vertically disposed around the second base plate 4. The outer sides of the first base plate 2 and the second base plate 4 are covered with a metal ground plate. The outer sides of the first side plate 3, the second side plate 5 and the hinge 1 are covered with metal patches, and the metal patches and the metal ground plate are always electrically connected.

[0048] The vertical arrangement of the first base plate 2 and the first side plate 3, the second base plate 4 and the second side plate 5 forms a structural support. The outer sides of the first base plate 2 and the second base plate 4 are covered with a metal floor, while the outer sides of the side plates and the hinge 1 are covered with metal patches. These metal components provide the radiation and reflection surfaces required by the antenna. The metal patches and the metal floor are always electrically connected to ensure that the antenna maintains a continuous electromagnetic field distribution in both unfolded and folded states.

[0049] The first antenna includes an IFA antenna 6 and a T antenna 7, with a slit between them. The T antenna 7 is connected to a first transmission line 8 for power feeding, and an inductor 9 connected in parallel to the metal ground plane is connected to the first transmission line 8. The IFA antenna 6 is fed through a second transmission line 10 connected to the metal ground plane. Matching elements 11 are connected in series or in parallel on both the first transmission line 8 and the second transmission line 10. A capacitance probe 12 is connected to the matching element 11 of the second transmission line 10. Several switching elements 13 are provided at the slit, and voltage probes 14 are connected to the switching elements 13.

[0050] IFA antenna 6 and T antenna 7 are separated by a slot to reduce mutual interference and optimize performance. T antenna 7 is fed through a first transmission line 8, which has an inductor 9 connected in parallel to a metal ground plane. This configuration helps to adjust the antenna's resonant frequency and impedance matching. IFA antenna 6 is fed through a second transmission line 10 connected to a metal ground plane. This design allows IFA antenna 6 to use the metal ground plane as a reflector, enhancing signal radiation efficiency. Matching elements 11 are connected in series or in parallel on both the first transmission line 8 and the second transmission line 10. These elements are used to adjust the antenna's impedance to ensure effective signal transmission. A capacitor probe 12 is connected to the matching element 11 of the second transmission line 10, which allows for fine impedance adjustment and frequency tuning. Several switching elements 13 are provided at the slit. These switching elements 13 are used to control the signal transmission path or switch modes to adapt to different communication needs. Voltage probes 14 are provided on the switching elements 13 to monitor and control the working state of the switching elements 13, ensuring the stability and performance of the antenna system under different operating conditions. The unique design of the switching elements 13 and voltage probes 14 enables the antenna to maintain good signal transmission capability even in a folded state, enhancing the portability and practicality of the device.

[0051] The second antenna includes a first parasitic antenna 15 coupled to the T antenna 7 and a second parasitic antenna 16 coupled to the IFA antenna 6. A gap 17 is provided between the first parasitic antenna 15 and the second parasitic antenna 16, and the first parasitic antenna 15 and the second parasitic antenna 16 are respectively grounded. The coupling of the first parasitic antenna 15 and the second parasitic antenna 16 with the main antenna (T antenna 7 and IFA antenna 6) enhances the radiation performance of the main antenna. This coupling effect improves the antenna's gain and directivity, thereby improving communication quality. The gap 17 between the first parasitic antenna 15 and the second parasitic antenna 16 helps reduce mutual interference between the two parasitic antennas and adjusts the antenna's resonant frequency. The separate grounding of the first parasitic antenna 15 and the second parasitic antenna 16 helps improve the antenna's radiation efficiency and reduce signal loss. The presence of the parasitic antennas can change the resonant frequency of the entire antenna system. By adjusting the length, position, and shape of the parasitic antennas, the antenna's operating frequency can be precisely controlled to meet the needs of multi-band communication.

[0052] Both the T-antenna 7 and the first parasitic antenna 15 are L-shaped structures. The L-shaped structure effectively utilizes space, especially in foldable electronic devices. This design helps achieve antenna functionality within a limited space. The resonant frequency of the L-shaped antenna can be controlled by adjusting the lengths of the two conductive parts. This adjustment helps the antenna operate within a specific frequency range to meet communication requirements.

[0053] Both the first and second antenna substrates are FR-4 dielectric substrates with a dielectric constant of 4.3. FR-4 dielectric substrates with a dielectric constant of 4.3 have good mechanical properties and stable electrical properties over a wide temperature range, which is very important for the performance stability of foldable electronic devices in different environments. The dielectric constant has a significant impact on the size and performance of the antenna because it determines the propagation speed of electrical signals in the medium, thereby affecting the resonant frequency and impedance matching of the antenna.

[0054] The thickness of the first base plate 2, the second base plate 4, and the hinge 1 is 0.8 mm; the thickness of the first side plate 3 and the second side plate 5 is 0.5 mm; and the thickness of the metal floor and the metal patch is 0.02 mm. By specifying the precise thickness of each component, the antenna design ensures structural stability and reliability in the foldable device, which is crucial for maintaining antenna performance and the overall durability of the device. The thinness of the metal floor and the metal patch helps provide good electromagnetic compatibility, reduces interference between internal components, and also provides a certain degree of protection against external electromagnetic interference.

[0055] The IFA antenna 6 is an IFA antenna 6 in the LB band, and the T antenna 7 is a T antenna 7 in the MHB band. The IFA antenna 6 is designated as an IFA antenna 6 in the LB band, while the T antenna 7 is designated as a T antenna 7 in the MHB band. This design allows the antennas to cover different frequency bands to adapt to different communication needs.

[0056] Please see Figure 4-5 The diagram shows the antenna structure of a foldable electronic device in the prior art. In the fully folded state, the metal ground part of the second antenna partially blocks the first antenna radiator, thereby affecting the antenna's radiation aperture and thus interfering with the antenna's various performance indicators.

[0057] Figure 1 contrast Figure 4 This is the implementation method of the technical solution of the present invention: The antenna of the present invention overcomes the pain point that the performance parameters of foldable devices are affected when they are fully folded (especially in the LB band). The parasitic antenna of the first antenna, namely the second antenna of the present invention, is designed. It not only utilizes the method of parasitic antenna participating in radiation through the energy coupling of electric field and magnetic field, but also cleverly expands the radiation aperture of the first antenna in terms of physical structure, thereby further improving efficiency.

[0058] Please see Figure 6-10 ,by Figure 1 The structure of the present invention shown has the following S-parameters in the unfolded state: Figure 6 As shown, its impedance bandwidth of S11 < -6dB is: 704MHz-961MHz, 1.58GHz-2.89GHz, namely the LB band and the MHB band.

[0059] like Figure 7 As shown is Figure 1 The diagram shows the system radiation efficiency and overall system efficiency of the structure of the present invention in its unfolded state. Within a bandwidth of 704MHz-961MHz, the average radiation efficiency reaches -4.43dB, and the average overall system efficiency reaches -5.09dB; within the 1.58GHz-2.89GHz frequency band, the average radiation efficiency reaches -1.71dB, and the average overall system efficiency reaches -2.47dB. In this case, the antenna design for foldable electronic devices is similar to the design of antennas for traditional candybar phones.

[0060] Figure 1 and Figure 4 The S-parameters, radiation efficiency, and system efficiency of the structure shown are as follows when it is in a fully folded state: Figure 8-10 As shown, Figure 4 In the folded state, the S-parameters completely fail to meet the bandwidth requirements. The impedance bandwidth of S11 < -6dB in the LB band is: 738MHz-812MHz, 823MHz-890MHz, 899MHz-956MHz, with average radiative efficiency and average total system efficiency decreasing to -5.78dB and -6.79dB, respectively. In the MHB band, the impedance bandwidth of S11 < -6dB is: 2.25GHz-2.67GHz, with average radiative efficiency and average total system efficiency decreasing to -2.45dB and -3.96dB, respectively. Adding a second antenna (i.e....) Figure 1 When the structure shown is in the folded state, its impedance bandwidth of S11 < -6dB in the LB band is 698MHz-960MHz, with average radiation efficiency and average total system efficiency improved to -3.36dB and -3.76dB, respectively; the impedance bandwidth of S11 < -6dB in the MHB band is 2.25GHz-2.67GHz, with average radiation efficiency and average total system efficiency improved to -1.93dB and -2.54dB, respectively; compared with the absence of the second antenna, its LB band system radiation efficiency and total system efficiency are improved by 2.42dB and 3.03dB, respectively; and its MHB band system radiation efficiency and total system efficiency are improved by 0.52dB and 1.42dB, respectively.

[0061] The technical solution of the present invention is not limited to the specific examples mentioned above. The present invention is a mobile phone antenna that operates in the LB and MHB frequency bands. By changing the size or matching element parameters, it can be used in other frequency bands. All technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

[0062] This invention provides a solution to improve the efficiency of mobile phone antennas in a fully folded state by utilizing methods such as expanding the radiation aperture and electromagnetic energy coupling. The technical solution is not limited by frequency band limitations (4G, 5G, and millimeter-wave bands, etc.), size limitations of this example, matching network limitations, switching network limitations, or the types of capacitors, inductors, and switching components. Modifications to the matching network parameters, antenna size, and switching network parameters can make it applicable to other frequency bands. All technical modifications made according to the technical solution of this invention fall within the protection scope of this invention.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. An antenna used in a foldable electronic device, comprising a first antenna substrate and a second antenna substrate hinged to the first antenna substrate, characterized in that: Both the first antenna substrate and the second antenna substrate can rotate around the hinge and switch between folded and unfolded states. In the folded state, the first antenna substrate, the hinge, and the second antenna substrate form a rectangular resonant cavity structure. The first antenna substrate is provided with a first antenna, and the second antenna substrate is provided with a second antenna coupled to the first antenna; The first antenna substrate includes a first base plate and a first side plate perpendicularly disposed around the circumference of the first base plate; the second antenna substrate includes a second base plate and a second side plate perpendicularly disposed around the circumference of the second base plate. The outer sides of the first base plate and the second base plate are covered with metal flooring, and the outer sides of the first side plate, the second side plate and the hinge are covered with metal patches, and the metal patches and the metal flooring are always electrically connected. The first antenna includes an IFA antenna and a T antenna, with a slot between the IFA antenna and the T antenna. The T antenna is connected to a first transmission line for power feeding, and an inductor connected in parallel to the metal ground plane is connected to the first transmission line. The IFA antenna is fed through a second transmission line connected to the metal ground plane. Matching elements are connected in series or in parallel on both the first and second transmission lines. A capacitor probe is connected to the matching element of the second transmission line. Several switching elements are provided at the slit, and a voltage probe is connected to the switching element.

2. The antenna used in a foldable electronic device according to claim 1, characterized in that: The second antenna includes a first parasitic antenna coupled to the T antenna and a second parasitic antenna coupled to the IFA antenna. A gap is provided between the first parasitic antenna and the second parasitic antenna, and the first parasitic antenna and the second parasitic antenna are respectively grounded.

3. An antenna for use in a foldable electronic device according to claim 2, characterized in that: Both the T-antenna and the first parasitic antenna are L-shaped structures.

4. An antenna for use in a foldable electronic device according to claim 1, characterized in that: Both the first antenna substrate and the second antenna substrate are FR-4 dielectric substrates with a dielectric constant of 4.

3.

5. An antenna for use in a foldable electronic device according to claim 2, characterized in that: The thickness of the first base plate, the second base plate, and the hinge is 0.8 mm. The thickness of both the first and second side plates is 0.5 mm; The thickness of the metal floor and metal patch is 0.02 mm.

6. An antenna for use in a foldable electronic device according to claim 3, characterized in that: The IFA antenna is an IFA antenna in the LB band, and the T antenna is a T antenna in the MHB band.

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