A 5G antenna for use in a mobile communication terminal and a mobile communication terminal

Abstract

This invention discloses a 5G antenna for a mobile communication terminal and a mobile communication terminal. The 5G antenna includes a main radiating element and a parasitic element. The main radiating element includes a feed point, a feed point connecting segment connected to the feed point, and a first antenna stub and a second antenna stub respectively connected to both ends of the feed point connecting segment. The parasitic element is separated from the second antenna stub by a first isolation region. In this invention, by setting the first antenna stub and the second antenna stub separately in the main radiating element to adapt to the mid-high frequency band and low frequency band of 5G communication respectively, the antenna frequency band can be better distinguished for structural design, avoiding the problem of difficulty in balancing various frequency bands, thereby significantly improving antenna performance.

Description

Technical Field

[0001] This utility model belongs to the field of mobile communications, and in particular relates to a 5G antenna for use in mobile communication terminals and a mobile communication terminal. Background Technology

[0002] 5G mobile communication terminals typically require multiple antennas. For example, a 5G smartphone usually has seven antennas. The Ant0 antenna, located at the bottom of the smartphone, presents the greatest design challenge and requires adaptation to the most frequency bands. Due to the complex environment at the bottom of a 5G smartphone, containing numerous structures such as the screen, sound cavity, motor, USB port, and headphone jack, it's difficult to design an Ant0 antenna effectively within the limited space. Existing Ant0 antennas lack proper antenna branching, resulting in overly simplistic branching and frequency band distribution, failing to meet design requirements. Therefore, it's necessary to improve the Ant0 antenna structure, rationally designing and distributing its branches within the limited space at the bottom of a 5G smartphone to enhance antenna performance and ensure that all frequency bands of the Ant0 antenna meet design requirements. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a 5G antenna for use in a mobile communication terminal and a mobile communication terminal.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A 5G antenna for use in a mobile communication terminal includes a main radiating element and a parasitic element. The main radiating element includes a feed point, a feed point connecting segment connected to the feed point, and a first antenna stub and a second antenna stub respectively connected to both ends of the feed point connecting segment. The parasitic element is separated from the second antenna stub by a first isolation region.

[0006] Furthermore, the end of the feed point connection segment facing the parasitic element is its first end, and the end facing away from the parasitic element is its second end; the first antenna stub includes a first transition segment and a first horizontal segment, the first end of the first transition segment is connected to the second end of the feed point connection segment, and the second end of the first transition segment is connected to the first end of the first horizontal segment.

[0007] Furthermore, the second antenna stub includes a first extending structure connected to the first end of the feed point connection segment and extending towards the parasitic element, a looping structure connected to one end of the first extending structure and looping back to the top of the first transition segment, and a second extending structure connected to one end of the looping structure and extending away from the parasitic element.

[0008] Furthermore, the first protruding structure is defined as a second horizontal segment, the second end of the second horizontal segment is connected to the first end of the feed point connection segment, and the first end of the second horizontal segment extends to the adjacent parasitic unit;

[0009] The loopback structure includes a first vertical segment, a third horizontal segment, and a second vertical segment. A first end of the first vertical segment is connected to a first end of the second horizontal segment, and a second end of the first vertical segment extends upwards to a height higher than the feed point. A first end of the third horizontal segment is connected to a second end of the first vertical segment, and a second end of the third horizontal segment extends above the feed point and beyond the area directly above it. A first end of the second vertical segment is connected to a second end of the third horizontal segment, and a second end of the second vertical segment extends downwards to a height adjacent to a first transition segment. The upper end of the feed point is separated from the third horizontal segment by a second isolation region, and the second end of the feed point is separated from the second vertical segment by a third isolation region.

[0010] The second protruding structure includes a second transition section, a fifth horizontal section, a third transition section, a sixth horizontal section, and a first arc-shaped section. The second transition section is located between the second vertical section and the first transition section. The first end of the second transition section is connected to the second end of the second vertical section. The second transition section and the first transition section are separated by a fourth isolation area. The second end of the second transition section is connected to the first end of the first arc-shaped section in sequence through the fifth horizontal section, the third transition section, and the sixth horizontal section.

[0011] Furthermore, the first horizontal segment and the fifth horizontal segment are arranged opposite to each other. A first notch is formed on the side of the first horizontal segment facing the fifth horizontal segment, and a second notch is formed on the side of the fifth horizontal segment facing the first horizontal segment. The first notch and the second notch are combined to form a hollow area. The shape of the hollow area is adapted to the shape of the USB interface of the mobile communication terminal.

[0012] The first transition section and the second transition section are located on one side of the excavated area. The width of the first transition section gradually narrows along the first direction, and the width of the second transition section gradually widens along the first direction, thereby forming an inclined fourth isolation area between the first transition section and the second transition section. The fourth isolation area is connected to the excavated area.

[0013] A first through hole is formed near the first end of the second horizontal segment, and the shape of the first through hole is adapted to the shape of the headphone jack of the mobile communication terminal; a plurality of second through holes are provided on the sixth horizontal segment, and the shape of the second through holes is adapted to the shape of the acoustic cavity hole of the mobile communication terminal.

[0014] Furthermore, the main radiating unit also includes a switching point and a fourth horizontal segment for connecting the switching point. The first end of the fourth horizontal segment is connected to the second vertical segment, the second end of the fourth horizontal segment is connected to the switching point, and the fourth horizontal segment and the fifth horizontal segment are separated by a fifth isolation region.

[0015] Furthermore, the width of the first isolation area is 0.7mm to 1mm; the widths of the second, third, fourth, and fifth isolation areas are greater than or equal to 0.3mm.

[0016] Furthermore, the feed point and the feed point connecting segment form a 90° angle; the first vertical segment and the second horizontal segment form a 90° angle; the second vertical segment and the fifth horizontal segment form a 90° angle.

[0017] Furthermore, the parasitic unit includes a parasitic point disposed on one side of the second antenna stub of the main radiating unit, a parasitic point connecting segment connected to the parasitic point, and a third antenna stub connected to the parasitic point connecting segment; the parasitic point and the parasitic point connecting segment form a 90° angle.

[0018] A mobile communication terminal includes a housing having a plastic frame, on which a 5G antenna as described in any of the preceding claims is disposed.

[0019] In this invention, by setting a first antenna stub and a second antenna stub respectively in the main radiating unit to adapt to the mid-high frequency band and low frequency band of 5G communication, the antenna frequency band can be better distinguished for structural design, avoiding the problem of difficulty in balancing various frequency bands. The optimized design significantly increases the electrical length of the second antenna stub, thus providing better support for the 5G low frequency band; in addition, by setting a first antenna stub with a shorter electrical length, it can better adapt to the 5G high frequency band. Therefore, by combining the first and second antenna stubs, the 5G antenna can meet the design requirements in all frequency bands, significantly improving antenna performance. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the casing of a mobile communication terminal in the prior art.

[0022] Figure 2 A schematic diagram of the structure of an ANT0 antenna in the prior art.

[0023] Figure 3This is a schematic diagram of an embodiment of a 5G antenna applied to a mobile communication terminal according to the present invention.

[0024] Figure 4 This is a schematic diagram of the main radiating unit.

[0025] Figure 5 The image shows the resonance and matching curves of the 5G antenna structure in this embodiment.

[0026] Figure 6 for Figure 2 Resonance and matching curves of existing 5G antenna structures.

[0027] Figure 7 This is a schematic diagram of the outer shell of a mobile communication terminal according to an embodiment of the present invention.

[0028] The diagrams in the instruction manual are labeled as follows:

[0029] Main radiating element -100; Feed point -101; Feed point connecting section -102;

[0030] First antenna stub-110; First transition section-111; First horizontal section-112;

[0031] Second antenna stub - 120; Second horizontal segment - 121; First vertical segment - 122; Third horizontal segment - 123; Second vertical segment - 124; Second transition segment - 125; Fifth horizontal segment - 126; Third transition segment - 127; Sixth horizontal segment - 128; First arc segment - 129;

[0032] Fourth horizontal segment -131; Switch point -132;

[0033] Parasitic element-200; Parasitic point-201; Parasitic point connecting segment-202; Third antenna stub-210;

[0034] First Isolation Zone - 301; Second Isolation Zone - 302; Third Isolation Zone - 303; Fourth Isolation Zone - 304; Fifth Isolation Zone - 305; Sixth Isolation Zone - 306;

[0035] Excavated area -310; First through hole -321; Second through hole -322;

[0036] Bottom -710; Right side -720; Bottom side -730; Left side -740; Top side -750;

[0037] ANT1 antenna - 801; ANT2 antenna - 802; ANT3 antenna - 803; ANT4 antenna - 804; ANT5 antenna - 805; ANT6 antenna - 806; ANT0 antenna - 810;

[0038] Outer shell - 900; USB port - 901; Headphone jack - 902; Sound chamber port - 903. Detailed Implementation

[0039] The following specific examples illustrate the implementation of this utility model. The illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] Please see Figure 1 and Figure 2 In existing technology, the ANT0 antenna 810 installed at the bottom of a 5G smartphone includes a main radiating element 100 and a parasitic element 200. The main radiating element 100 is provided with a feed point 101 and a switching point 132, and the parasitic element 200 is provided with a parasitic point 201. Due to the complex bottom structure of 5G smartphones, which includes a screen, sound cavity, motor, USB interface, headphone jack, and other structures, and the space constraints of the installation environment, the main radiating element 100 is a single structure without separate antenna stubs for different frequency bands. This results in extremely poor performance of the ANT0 antenna 810 in the low-frequency band of 5G and relatively poor performance in the mid-to-high-frequency band of 5G, making it difficult to meet design requirements.

[0041] Please see Figure 3 , Figure 3 This is a schematic diagram of a 5G antenna according to an embodiment of the present invention, applied to a mobile communication terminal. The 5G antenna of this embodiment includes a main radiating element 100 and a parasitic element 200. The main radiating element 100 includes a feed point 101, a feed point connecting segment 102 connected to the feed point 101, and a first antenna stub 110 and a second antenna stub 120 respectively connected to both ends of the feed point connecting segment 102. The first antenna stub 110 is used to adapt to the mid-to-high frequency band of 5G communication, and the second antenna stub 120 is used to adapt to the low frequency band of 5G communication.

[0042] The parasitic unit 200 is separated from the second antenna stub 120 by a first isolation region 301. In this embodiment, the parasitic unit 200 includes a parasitic point 201 disposed on one side of the second antenna stub 120 of the main radiating unit 100, a parasitic point connecting segment 202 connected to the parasitic point 201, and a third antenna stub 210 connected to the parasitic point connecting segment 202. The third antenna stub 210 is used to adapt to the mid-frequency band of 5G communication. The parasitic point connecting segment 202 is separated from the second antenna stub 120 by the first isolation region 301, the width of which is 0.7mm to 1mm, to achieve mutual coupling between the main radiating unit 100 and the parasitic unit 200.

[0043] Please see Figure 4 The end of the feed point connection segment 102 facing the parasitic unit 200 is its first end, and the end facing away from the parasitic unit 200 is its second end. The first antenna stub 110 includes a first transition segment 111 and a first horizontal segment 112. The first end of the first transition segment 111 is connected to the second end of the feed point connection segment 102, and the second end of the first transition segment 111 is connected to the first end of the first horizontal segment 112.

[0044] The first antenna stub 110 has a relatively short electrical length and is mainly used for mid-to-high frequency band communication in 5G communication, such as the N7, N38, N39, N40, and N41 bands. In this embodiment, the electrical length from the feed point 101 to the end of the first antenna stub 110 (i.e., the second end of the first horizontal segment 112) is adapted to the antenna requirements of the 1880MHz to 2700MHz frequency band.

[0045] The second antenna stub 120 includes a first extending structure connected to the first end of the feed connection section 102 and extending towards the parasitic element 200, a looping structure connected to one end of the first extending structure and looping back to above the first transition section 111, and a looping structure connected to one end of the looping structure and extending away from the parasitic element 200 (i.e., Figure 4 A second protruding structure extending in the negative direction of the x-axis. In this embodiment, the first protruding structure is defined as a second horizontal segment 121, the second end of which is connected to the first end of the feed point connection segment 102, and the first end of which extends to the adjacent parasitic unit 200. By setting a loopback structure, the electrical length of the second antenna stub 120 can be significantly increased within a predetermined space, thereby better adapting to the low-frequency band in 5G communication.

[0046] The loopback structure may include a first vertical segment 122, a third horizontal segment 123, and a second vertical segment 124. A first end of the first vertical segment 122 is connected to a first end of the second horizontal segment 121, and a second end of the first vertical segment 122 extends upwards to a height higher than the feed point 101 (i.e., the first vertical segment 122 is at...). Figure 4 The highest point in the z-axis direction is 101 points higher than the feed point. Figure 4The highest point in the z-axis direction). The first end of the third horizontal segment 123 is connected to the second end of the first vertical segment 122, and the second end of the third horizontal segment 123 extends above the feed point 101 and across the area directly above the feed point 101. The first end of the second vertical segment 124 is connected to the second end of the third horizontal segment 123, and the second end of the second vertical segment 124 extends downward to the vicinity of the first transition segment 111. The upper end of the feed point 101 is separated from the third horizontal segment 123 by the second isolation region 302, and the second end of the feed point 101 is separated from the second vertical segment 124 by the third isolation region 303; the width of the second isolation region 302 and the third isolation region 303 is generally greater than or equal to 0.3mm, and the specific width can be determined according to the actual space available for setting the antenna in the bottom structure of the 5G smartphone. In this embodiment, due to the limitation of design space, the width of the second isolation region 302 and the third isolation region 303 is generally between 0.3mm and 0.7mm.

[0047] The second protruding structure includes a second transition segment 125, a fifth horizontal segment 126, a third transition segment 127, a sixth horizontal segment 128, and a first arc-shaped segment 129. The second transition segment 125 is located between the second vertical segment 124 and the first transition segment 111. The first end of the second transition segment 125 is connected to the second end of the second vertical segment 124, and the second transition segment 125 and the first transition segment 111 are separated by a fourth isolation region 304. The width of the fourth isolation region 304 is generally greater than or equal to 0.3 mm; for example, the width of the fourth isolation region 304 can be between 0.3 mm and 0.7 mm. The second end of the second transition segment 125 is connected to the first end of the first arc-shaped segment 129 sequentially through the fifth horizontal segment 126, the third transition segment 127, and the sixth horizontal segment 128.

[0048] In this embodiment, the main radiating unit 100 further includes a switching point 132 and a fourth horizontal segment 131 for connecting the switching point 132. The first end of the fourth horizontal segment 131 is connected to the second vertical segment 124, and the second end of the fourth horizontal segment 131 is connected to the switching point 132. The fourth horizontal segment 131 and the fifth horizontal segment 126 are separated by a fifth isolation region 305. The width of the fifth isolation region 305 is generally greater than or equal to 0.3 mm; for example, the width of the fifth isolation region 305 can be between 0.3 mm and 0.7 mm.

[0049] The second antenna stub 120 has a relatively long electrical length and is mainly used for communication in low-frequency bands such as N5, N8, N20, and N28 in 5G communication. In this embodiment, the electrical length from the feed point 101 to the end of the second antenna stub 120 (i.e., the second end of the first arc segment 129) is adapted to the antenna requirements of the 700MHz to 960MHz frequency band.

[0050] To facilitate adaptation to the bottom structure of 5G smartphones, in this embodiment, the first horizontal segment 112 and the fifth horizontal segment 126 are arranged opposite to each other. A first notch is formed on the side of the first horizontal segment 112 facing the fifth horizontal segment 126, and a second notch is formed on the side of the fifth horizontal segment 126 facing the first horizontal segment 112. The first notch and the second notch combine to form a cutout area 310. The shape of the cutout area 310 is adapted to the shape of the USB through-hole 901 (e.g., the through-hole of the Type-C interface) of the mobile communication terminal, so that the USB interface of the mobile communication terminal can pass through the 5G antenna.

[0051] The first transition section 111 and the second transition section 125 are located on one side of the excavated area 310. The first transition section 111 has a trapezoidal structure, and the width of the first transition section 111 is along a first direction (i.e., Figure 4 The width of the second transition section 125 gradually narrows along the positive direction of the x-axis. The second transition section 125 has a triangular structure and its width gradually widens along the first direction, thereby forming an inclined fourth isolation region 304 between the first transition section 111 and the second transition section 125. The fourth isolation region 304 is connected to the hollowed-out region 310.

[0052] The transition between the first transition section 111 and the second transition section 125 reduces the width of the first horizontal section 112 and the fifth horizontal section 126, facilitating the formation of the first horizontal section 112 and the fifth horizontal section 126 respectively within the narrow spaces on both sides of the excavated area 310. The transition between the third transition section 127 increases the width of the sixth horizontal section 128, thereby restoring the sixth horizontal section 128 to its normal width.

[0053] A first through hole 321 is formed near its first end on the second horizontal segment 121. The shape of the first through hole 321 is adapted to the shape of the headphone jack 902 of the mobile communication terminal to facilitate the installation of the headphone jack of the mobile communication terminal. A plurality of second through holes 322 are provided on the sixth horizontal segment 128. The shape of the second through holes 322 is adapted to the shape of the sound cavity hole 903 of the mobile communication terminal to facilitate the sound from the external speaker of the mobile communication terminal to be transmitted through the second through holes 322 and the sound cavity hole 903.

[0054] Please continue reading. Figure 3The parasitic point connection segment 202 has its first end facing the main radiating unit 100 and its second end facing away from the main radiating unit 100. The third antenna stub 210 is defined as a second arc segment, and the first end of the second arc segment is connected to the second end of the parasitic point connection segment 202.

[0055] The third antenna stub 210 has a moderate electrical length and is mainly used for mid-frequency communication in 5G bands such as N1 and N3. Through parasitic point 201 and parasitic point connecting segment 202, it can electromagnetically couple with the first vertical segment 122, thereby improving the communication performance of the mid-frequency band in 5G communication. The electrical length from parasitic point 201 to the end of the third antenna stub 210 (i.e., the second end of the second arc-shaped segment) is compatible with the antenna requirements of the 1710MHz–2170MHz frequency band.

[0056] To accommodate the space at the bottom of the mobile communication terminal, the feed point 101 and the feed point connecting segment 102 form a 90° angle; the first vertical segment 122 and the second horizontal segment 121 form a 90° angle; the second vertical segment 124 and the fifth horizontal segment 126 form a 90° angle; and the parasitic point 201 and the parasitic point connecting segment 202 form a 90° angle. This allows the feed point connection segment 102, the first transition segment 111, the first horizontal segment 112, the second horizontal segment 121, the second transition segment 125, the fifth horizontal segment 126, the third transition segment 127, the sixth horizontal segment 128, the first arc segment 129, the parasitic point connection segment 202, and the second arc segment to be set on the same surface, while the feed point 101, the first vertical segment 122, the third horizontal segment 123, the second vertical segment 124, the switch point 132, the fourth horizontal segment 131, and the parasitic point 201 can be set on another surface, thus dividing the 5G antenna into two parts to adapt to the internal structure of the mobile communication terminal.

[0057] Please see Figure 5 and Figure 6 By comparing the 5G antenna structure of this embodiment with... Figure 2 The resonance and matching curves of existing 5G antenna structures show that the resonance and matching performance of the 5G antenna structure in this embodiment is far superior to that of existing structures. Figure 2 The existing 5G antenna structure is shown in Table 1. Please refer to Table 1 for the 5G antenna structure in this embodiment and... Figure 2 Efficiency comparison table of existing 5G antenna structures:

[0058] Table 1

[0059]

[0060] As can be seen from Table 1, the 5G antenna structure in this embodiment significantly outperforms other antennas in terms of the number of supported frequency bands and antenna efficiency. Figure 2The existing 5G antenna structure in the technology.

[0061] In this embodiment, by setting a first antenna stub 110 and a second antenna stub 120 in the main radiating element 100 to adapt to the mid-high frequency and low frequency bands of 5G communication respectively, the antenna frequency bands can be better distinguished for structural design, avoiding the problem of difficulty in balancing various frequency bands. The optimized design greatly increases the electrical length of the second antenna stub 120, thereby providing better support for the 5G low frequency band; in addition, by setting the first antenna stub 110 with a shorter electrical length, it can better adapt to the 5G high frequency band; thus, the combined effect of the first antenna stub 110 and the second antenna stub 120 significantly improves the antenna performance.

[0062] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a mobile communication terminal according to an embodiment of the present invention. The mobile communication terminal of this embodiment includes a housing 900, which has a plastic frame. A 5G antenna, as described in the above embodiment, is disposed on the plastic frame. The 5G antenna is a metal layer formed on the plastic frame of the housing using a laser engraving and plating process. Of course, the mobile communication terminal also includes other essential components such as a motherboard and a screen, which are existing technologies and will not be described in detail here.

[0063] In this embodiment, the upper part of the plastic frame is provided with ANT1 antenna 801, ANT2 antenna 802, ANT3 antenna 803, ANT4 antenna 804, ANT5 antenna 805, and ANT6 antenna 806, and the bottom of the plastic frame is provided with ANT0 antenna 810. The ANT0 antenna 810 adopts a 5G antenna applied to a mobile communication terminal as described in the above embodiment.

[0064] Because the feed point and feed point connecting segment form a 90° angle, the first vertical segment and the second horizontal segment form a 90° angle, the second vertical segment and the fifth horizontal segment form a 90° angle, and the parasitic point and parasitic point connecting segment form a 90° angle, the ANT0 antenna 810 can be mounted on two different structures of the plastic frame. The plastic frame includes a bottom surface 710 and four sides formed around the bottom surface 710, namely the right side 720, the bottom side 730, the left side 740, and the top side 750. The feed point, the first vertical segment, the third horizontal segment, the second vertical segment, the switch point, the fourth horizontal segment, and the parasitic point are set on the bottom surface 710. The feed point connecting segment, the first transition segment, the first horizontal segment, the second horizontal segment, the second transition segment, the fifth horizontal segment, the third transition segment, the sixth horizontal segment, and the parasitic point connecting segment are set on the bottom side surface 730 of the plastic frame. The first arc-shaped segment is set at the arc-shaped chamfer of the area connecting the bottom side surface 730 and the right side surface 720 of the plastic frame. The second arc-shaped segment is set at the arc-shaped chamfer of the area connecting the bottom side surface 730 and the left side surface 740 of the plastic frame.

[0065] In this embodiment, by rationally designing and allocating antenna branches within the limited space at the bottom of the mobile communication terminal (e.g., a 5G smartphone), and differentiating the antenna frequency bands by designing the structure of the first antenna branch 110 and the second antenna branch 120, the 5G antenna can have a shorter electrical length when the mobile communication terminal operates in the 5G high-frequency band, and a longer electrical length when the mobile communication terminal operates in the 5G low-frequency band. This allows the 5G antenna to meet the design requirements in each frequency band, greatly improving the communication effect of the mobile communication terminal and enhancing the user experience.

[0066] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A 5G antenna applied to a mobile communication terminal, characterized by comprising: It includes a main radiating element and a parasitic element. The main radiating element includes a feed point, a feed point connection segment connected to the feed point, and a first antenna stub and a second antenna stub connected to both ends of the feed point connection segment, respectively. The parasitic element is separated from the second antenna stub by a first isolation region. 2.The 5G antenna applied to a mobile communication terminal of claim 1, wherein: The end of the feed point connection segment facing the parasitic element is its first end, and the end facing away from the parasitic element is its second end; the first antenna stub includes a first transition segment and a first horizontal segment, the first end of the first transition segment is connected to the second end of the feed point connection segment, and the second end of the first transition segment is connected to the first end of the first horizontal segment.

3. A 5G antenna for use in a mobile communication terminal as described in claim 2, characterized in that: The second antenna stub includes a first extending structure connected to the first end of the feed point connection segment and extending into the parasitic element, a looping structure connected to one end of the first extending structure and looping back to the top of the first transition segment, and a second extending structure connected to one end of the looping structure and extending away from the parasitic element.

4. A 5G antenna for use in a mobile communication terminal as described in claim 3, characterized in that: The first protruding structure is defined as a second horizontal segment, the second end of the second horizontal segment is connected to the first end of the feed point connection segment, and the first end of the second horizontal segment extends to the adjacent parasitic unit. The loopback structure includes a first vertical segment, a third horizontal segment, and a second vertical segment. A first end of the first vertical segment is connected to a first end of the second horizontal segment, and a second end of the first vertical segment extends upwards to a height higher than the feed point. A first end of the third horizontal segment is connected to a second end of the first vertical segment, and a second end of the third horizontal segment extends above the feed point and beyond the area directly above it. A first end of the second vertical segment is connected to a second end of the third horizontal segment, and a second end of the second vertical segment extends downwards to a height adjacent to a first transition segment. The upper end of the feed point is separated from the third horizontal segment by a second isolation region, and the second end of the feed point is separated from the second vertical segment by a third isolation region. The second protruding structure includes a second transition section, a fifth horizontal section, a third transition section, a sixth horizontal section, and a first arc-shaped section. The second transition section is located between the second vertical section and the first transition section. The first end of the second transition section is connected to the second end of the second vertical section. The second transition section and the first transition section are separated by a fourth isolation area. The second end of the second transition section is connected to the first end of the first arc-shaped section in sequence through the fifth horizontal section, the third transition section, and the sixth horizontal section.

5. A 5G antenna for use in a mobile communication terminal as described in claim 4, characterized in that: The first horizontal segment and the fifth horizontal segment are arranged opposite to each other. A first notch is formed on the side of the first horizontal segment facing the fifth horizontal segment, and a second notch is formed on the side of the fifth horizontal segment facing the first horizontal segment. The first notch and the second notch are combined to form a hollow area. The shape of the hollow area is adapted to the shape of the USB interface of the mobile communication terminal. The first transition section and the second transition section are located on one side of the excavated area. The width of the first transition section gradually narrows along the first direction, and the width of the second transition section gradually widens along the first direction, thereby forming an inclined fourth isolation area between the first transition section and the second transition section. The fourth isolation area is connected to the excavated area. A first through hole is formed near the first end of the second horizontal segment, and the shape of the first through hole is adapted to the shape of the headphone jack of the mobile communication terminal; a plurality of second through holes are provided on the sixth horizontal segment, and the shape of the second through holes is adapted to the shape of the acoustic cavity hole of the mobile communication terminal.

6. A 5G antenna for use in a mobile communication terminal as described in claim 4, characterized in that: The main radiating unit also includes a switching point and a fourth horizontal segment for connecting the switching point. The first end of the fourth horizontal segment is connected to the second vertical segment, the second end of the fourth horizontal segment is connected to the switching point, and the fourth horizontal segment and the fifth horizontal segment are separated by a fifth isolation area.

7. A 5G antenna for use in a mobile communication terminal as described in claim 6, characterized in that: The width of the first isolation area is 0.7mm to 1mm; the widths of the second, third, fourth and fifth isolation areas are greater than or equal to 0.3mm.

8. A 5G antenna for use in a mobile communication terminal as described in claim 4, characterized in that: The feed point and the feed point connecting segment form a 90° angle; the first vertical segment and the second horizontal segment form a 90° angle; the second vertical segment and the fifth horizontal segment form a 90° angle.

9. A 5G antenna for use in a mobile communication terminal as described in any one of claims 1 to 8, characterized in that: The parasitic unit includes a parasitic point located on one side of the second antenna stub of the main radiating unit, a parasitic point connecting segment connected to the parasitic point, and a third antenna stub connected to the parasitic point connecting segment; the parasitic point and the parasitic point connecting segment form a 90° angle.

10. A mobile communication terminal, characterized in that: The device includes a housing having a plastic frame on which a 5G antenna for use in a mobile communication terminal as described in any one of claims 1 to 9 is disposed.

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