MDA middle frame antenna assembly for 5G mobile terminal

Abstract

The utility model provides an MDA middle frame antenna assembly used for a 5G mobile terminal. The MDA middle frame antenna assembly comprises an NR main transmitting antenna, a medium-high frequency receiving antenna and a WIFI 5Gamp. An NR receiving antenna and a WIFI 2.4 Gamp; the GPS antenna is directly integrated into the middle frame of the 5G mobile terminal by adopting an MDA technology and is matched with the middle frame of the 5G mobile terminal, namely WIFI 2.4 Gamp; a GPS (Global Positioning System) antenna and a WIFI (Wireless Fidelity) 5Gamp; the NR receiving antennas are located between the NR main transmitting antenna and the medium-high frequency receiving antenna, and WIFI5Gamp; the NR receiving antenna is connected with the WIFI 2.4 Gamp; the GPS antenna shares a receiving antenna ground point, the NR main transmitting antenna is provided with a main transmitting antenna ground point and a main transmitting antenna feeding point, the distance between the main transmitting antenna feeding point and the main transmitting antenna ground point is d1, and d1 is larger than or equal to 3mm and smaller than or equal to 10mm. The beneficial effects of the utility model are that the antenna performance index requirement can be satisfied and the mutual interference of the antenna can be reduced at the same time.

Description

An MDA mid-frame antenna assembly for 5G mobile terminals Technical Field

[0001] This utility model relates to the field of communication technology, specifically to an MDA mid-frame antenna assembly for 5G mobile terminals. Background Technology

[0002] MDA (Mold Direct Assembly) is an advanced manufacturing technology that allows for the creation of specific layouts within a mold. It enables the assembly of multiple components within the mold itself, thereby improving production efficiency and product quality. This technology is widely used in the automotive, electronics, and consumer goods manufacturing industries.

[0003] With the widespread adoption and commercialization of 5G mobile communication technology, communication technology in mobile terminals has also developed rapidly. The vast majority of mobile terminals on the market are now equipped with 5G technology, which can significantly improve network download speeds and data transmission speeds. Currently, a report released by the GSMA think tank shows that the number of global 5G connections has reached 1.6 billion. Faced with such a huge customer base, every smart terminal manufacturer wants to capture as many customers as possible. How to make their products stand out is a complex issue. However, regardless of the ranking of factors contributing to the popularity of 5G smart terminals, their communication capabilities are exceptionally important.

[0004] Because current 5G mobile terminal devices are primarily defined by their thinness and lightness and high screen-to-body ratio, the space for antenna design has been significantly reduced. These factors are fatal to antenna design; a reasonable antenna layout is crucial to meeting antenna performance requirements (including total radiation efficiency and return loss). Many existing antenna solutions suffer from poor total radiation efficiency and mutual interference between multiple antennas, which significantly impacts the user experience. Summary of the Invention

[0005] To address the problems in existing technologies, this utility model provides an MDA mid-frame antenna assembly for 5G mobile terminals. By setting up a cooperative NR main transmitting antenna, a mid-to-high frequency receiving antenna, a WIFI 5G & NR receiving antenna, and a WIFI 2.4G & GPS antenna within the 5G mobile terminal, it can ensure that the total radiation efficiency meets people's comprehensive needs without causing mutual interference between adjacent antennas. This solves the problems of poor total radiation efficiency and mutual interference between multiple antennas in many existing antenna solutions.

[0006] This utility model provides an MDA mid-frame antenna assembly for a 5G mobile terminal, including an NR main transmitting antenna, a mid-to-high frequency receiving antenna, a WIFI 5G & NR receiving antenna, and a WIFI 2.4G & GPS antenna. The NR main transmitting antenna, the mid-to-high frequency receiving antenna, the WIFI 5G & NR receiving antenna, and the WIFI 2.4G & GPS antenna are directly integrated into the mid-frame of the 5G mobile terminal using MDA technology and cooperate with each other. The NR main transmitting antenna, the mid-to-high frequency receiving antenna, the WIFI 5G & NR receiving antenna, and the WIFI 2.4G & GPS antenna are electrically connected to the main control circuit board inside the 5G mobile terminal. The NR main transmitting antenna is located on the inner top of the metal frame of the 5G mobile terminal, and the mid-to-high frequency receiving antenna is located on the inner top of the metal frame of the 5G mobile terminal. On the inner side of the metal frame of the terminal, the WIFI 2.4G & GPS antenna is located between the NR main transmitting antenna and the mid-to-high frequency receiving antenna, and the WIFI 5G & NR receiving antenna is located between the WIFI 2.4G & GPS antenna and the mid-to-high frequency receiving antenna. A receiving antenna return point is provided between the WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna. The WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna are fixedly connected at the receiving antenna return point. The NR main transmitting antenna has a main transmitting antenna return point and a main transmitting antenna feed point for signal extraction. The distance between the main transmitting antenna feed point and the main transmitting antenna return point is d1, and the value of d1 is in the range of 3mm ≤ d1 ≤ 10mm.

[0007] In a further improvement to this invention, the distance d1 between the main transmitting antenna feed point and the main transmitting antenna return point is set to 4mm.

[0008] This utility model is further improved in that the NR main transmitting antenna has the properties of an inverted F antenna and its length is selected as 18mm.

[0009] This utility model is further improved, and the operating frequency band of the NR main transmitting antenna includes N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz and N79: 4.4GHz-5GHz.

[0010] This utility model is further improved in that the medium-high frequency receiving antenna is a slotted loop antenna, and the operating frequency band of the medium-high frequency receiving antenna includes B / N1: 1.92GHz-2.17GHz, B / N3: 1.71GHz-1.88GHz, B / N40: 2.3GHz-2.4GHz and B / N41: 2.496GHz-2.690GHz.

[0011] This utility model is further improved in that the WIFI 5G & NR receiving antenna is a loop antenna with a circumference of 9mm. The operating frequency bands of the WIFI 5G & NR receiving antenna include N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz, N79: 4.4GHz-5GHz and 5GHz WIFI: 5.15GHz-5.8GHz.

[0012] This utility model is further improved in that the WIFI 2.4G & GPS antenna is a slotted loop antenna, and the operating frequency band of the WIFI 2.4G & GPS antenna includes 2.4GHz WIFI: 2.4GHz-2.48GHz, GPS L1: 1575.42MHz.

[0013] The present invention is further improved in that the main transmitting antenna feed point is located on the inner side of the top of the metal frame of the 5G mobile terminal and extends into the interior of the 5G mobile terminal, and the main transmitting antenna return point extends from the inner side of the top of the metal frame of the 5G mobile terminal into the interior of the 5G mobile terminal and is electrically connected to the grounding shell of the 5G mobile terminal.

[0014] In a further improvement of this utility model, the receiving antenna return point extends from the connection point of the WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna into the interior of the 5G mobile terminal and is electrically connected to the main control circuit board inside the 5G mobile terminal.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an MDA mid-frame antenna assembly for 5G mobile terminals. By setting up mutually cooperating NR main transmitting antenna, mid-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna within the 5G mobile terminal, and using MDA technology to directly integrate the NR main transmitting antenna, mid-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna into the mid-frame of the 5G mobile terminal, while separating antennas of the same frequency and band, it can ensure that the total radiation efficiency of the MDA mid-frame antenna assembly for 5G mobile terminals meets people's comprehensive needs without causing mutual interference between adjacent antennas. This solves the problems of poor total radiation efficiency and mutual interference between multiple antennas in many existing antenna solutions. Attached Figure Description

[0016] To more clearly illustrate the solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 is a structural diagram of the MDA mid-frame antenna assembly for a 5G mobile terminal according to this utility model;

[0018] Figure 2 shows the return loss diagram of the NR main transmitter antenna of this utility model;

[0019] Figure 3 shows the total radiation efficiency of the NR main transmitting antenna of this utility model.

[0020] Figure 4 shows the return loss diagram of the high-frequency receiving antenna of this utility model.

[0021] Figure 5 shows the total radiation efficiency of the high-frequency receiving antenna of this utility model.

[0022] Figure 6 shows the far-field radiation pattern of the high-frequency receiving antenna of this utility model;

[0023] Figure 7 shows the return loss diagram of the WIFI 5G & NR receiving antenna of this utility model.

[0024] Figure 8 shows the total radiation efficiency of the WIFI 5G & NR receiving antenna of this utility model.

[0025] Figure 9 shows the return loss diagram of the inductor-capacitor oscillation circuit of the WIFI 2.4G & GPS antenna of this utility model.

[0026] Figure 10 is a circuit diagram of the antenna inductor-capacitor oscillation circuit of the WIFI 2.4G & GPS antenna of this utility model;

[0027] Figure 11 shows the return loss diagram after the WIFI 2.4G & GPS antenna of this utility model has been debugged;

[0028] Figure 12 shows the total radiation efficiency of the WIFI 2.4G & GPS antenna after debugging.

[0029] In the diagram, 1-NR main transmitting antenna, 11-main transmitting antenna return point, 12-main transmitting antenna feed point, 2-medium-high frequency receiving antenna, 3-WIFI 5G & NR receiving antenna, 4-WIFI 2.4G & GPS antenna, and 5-receiving antenna return point. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0033] As shown in Figures 1-12, this utility model provides an MDA mid-frame antenna assembly for a 5G mobile terminal, including an NR main transmitting antenna 1, a mid-to-high frequency receiving antenna 2, a WIFI 5G & NR receiving antenna 3, and a WIFI 2.4G & GPS antenna 4. The NR main transmitting antenna 1, mid-to-high frequency receiving antenna 2, WIFI 5G & NR receiving antenna 3, and WIFI 2.4G & GPS antenna 4 are directly integrated into the mid-frame of the 5G mobile terminal using MDA technology and cooperate with each other. The NR main transmitting antenna 1, mid-to-high frequency receiving antenna 2, WIFI 5G & NR receiving antenna 3, and WIFI 2.4G & GPS antenna 4 are electrically connected to the main control circuit board inside the 5G mobile terminal. The NR main transmitting antenna 1 is located on the inner top of the metal frame of the 5G mobile terminal, and the mid-to-high frequency receiving antenna 2 is located on... Inside the metal frame of the 5G mobile terminal, the WIFI 2.4G & GPS antenna 4 is located between the NR main transmitting antenna 1 and the mid-to-high frequency receiving antenna 2. The WIFI 5G & NR receiving antenna 3 is located between the WIFI 2.4G & GPS antenna 4 and the mid-to-high frequency receiving antenna 2. A receiving antenna return point 5 is provided between the WIFI 5G & NR receiving antenna 3 and the WIFI 2.4G & GPS antenna 4. The WIFI 5G & NR receiving antenna 3 and the WIFI 2.4G & GPS antenna 4 are fixedly connected at the receiving antenna return point 5. The NR main transmitting antenna 1 is provided with a main transmitting antenna return point 11 and a main transmitting antenna feed point 12 for signal extraction. The distance between the main transmitting antenna feed point 12 and the main transmitting antenna return point 11 is d1, and the value of d1 is in the range of 3mm≤d1≤10mm. In this embodiment, the distance d1 between the feed point and return point of the main transmitting antenna is 4mm. The NR main transmitting antenna and the WIFI 5G & NR receiving antenna are separated by the WIFI 2.4G & GPS antenna, and the mid-high frequency receiving antenna and the WIFI 2.4G & GPS antenna are separated by the WIFI 5G & NR receiving antenna. This reduces mutual interference within the entire MDA mid-frame antenna assembly. By using MDA technology to directly integrate the NR main transmitting antenna, mid-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna into the mid-frame of the 5G mobile terminal, and separating antennas of the same frequency and band, the overall radiation efficiency of the MDA mid-frame antenna assembly used in the 5G mobile terminal can be guaranteed to meet people's comprehensive needs without generating mutual interference between adjacent antennas. The main control circuit board inside the 5G mobile terminal is equipped with antenna springs, and the NR main transmitting antenna, mid-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna are connected to the radio frequency circuit on the main control circuit board through the antenna springs.

[0034] As shown in Figures 1-3, the NR main transmitting antenna 1 has the characteristics of an inverted-F antenna, with a length of 18mm. The operating frequency bands of the NR main transmitting antenna include N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz, and N79: 4.4GHz-5GHz. The main transmitting antenna feed point 12 is located on the inner side of the top of the metal frame of the 5G mobile terminal and extends into the interior of the 5G mobile terminal. The main transmitting antenna return point 11 extends from the inner side of the top of the metal frame of the 5G mobile terminal into the interior of the 5G mobile terminal and is electrically connected to the grounding shell of the 5G mobile terminal. In this embodiment, the NR main transmitting antenna is essentially an inverted-F antenna with a frequency of approximately 3.9GHz. Its transmission and reception conform to the basic characteristics of an inverted-F antenna receiving a fundamental wave with a wavelength approximately four to eight times its own. Taking the NR main transmitting antenna as an example, c = 2.97 * 10^8, λ 1小 =4*18mm=0.072m, λ 2大 =8*18mm=0.144m, λ3=c / f1≈0.076m, the distance d1 between the feed point and return point of the main transmitting antenna is 4mm. After multiple antenna simulations, it is found that the antenna performance is best when the distance between the feed point and return point of the main transmitting antenna is kept between 3-10mm. The return loss diagram of the NR main transmitting antenna is shown in Figure 2, and the total radiation efficiency diagram of the NR main transmitting antenna is shown in Figure 3. The total radiation efficiency in the frequency band is about -3dB, which is 3dB higher than the industry average of -6dB.

[0035] As shown in Figures 4-6, the mid-to-high frequency (MTBF) receiving antenna 2 is a slotted loop antenna. The operating frequency bands of the MTBF receiving antenna 2 include B / N1: 1.92GHz-2.17GHz, B / N3: 1.71GHz-1.88GHz, B / N40: 2.3GHz-2.4GHz, and B / N41: 2.496GHz-2.690GHz. In this embodiment, the MTBF receiving antenna is essentially a slotted loop antenna, which is an antenna combining a loop structure with slot radiation characteristics. The return loss diagram of the MTBF receiving antenna is shown in Figure 4, the total radiation efficiency diagram is shown in Figure 5, and the far-field radiation pattern is shown in Figure 6. Figures 5 and 6 demonstrate the wideband performance of this type of antenna. The far-field radiation pattern in Figure 6 is relatively full, reflecting the omnidirectional radiation characteristics of this antenna type.

[0036] As shown in Figure 7-12, the WIFI 5G & NR receiving antenna 3 is a loop antenna with a circumference of 9mm. The operating frequency bands of the WIFI 5G & NR receiving antenna 3 include N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz, N79: 4.4GHz-5GHz and 5GHz WIFI: 5.15GHz-5.8GHz. The WIFI 2.4G & GPS antenna 4 is a slotted loop antenna. The operating frequency bands of the WIFI 2.4G & GPS antenna 4 include 2.4GHz WIFI: 2.4GHz-2.48GHz and GPSL1: 1575.42MHz. The receiving antenna return point 5 extends from the connection point of the WIFI 5G & NR receiving antenna 3 and the WIFI 2.4G & GPS antenna 4 into the interior of the 5G mobile terminal and is electrically connected to the main control circuit board inside the 5G mobile terminal. In this embodiment, the receiving antenna return point is electrically connected to the antenna spring, forming an RF path extending into the main control circuit board inside the 5G mobile terminal. The WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna share a common loop ground, namely the receiving antenna return point. This utilizes the characteristics that the frequency bands are different and the radiators are far apart, and the mutual influence of the main circuit RC inductance matching and tuning is small. Sharing the receiving antenna return point reduces the cost of antenna segmentation. The WIFI 5G & NR receiving antenna is essentially a loop antenna. The return loss diagram of the WIFI 5G & NR receiving antenna is shown in Figure 7. The perimeter formed by the inner feed point and the receiving antenna return point is about 9mm, and the deepest resonant point is about 3.2GHz. λ=c / f1≈9.2mmm, which conforms to the characteristic that the perimeter of a loop antenna is approximately equal to the wavelength. The total radiation efficiency diagram of the WIFI 5G & NR receiving antenna is shown in Figure 8. The total radiation efficiency of the 5G WIFI band is -4dB, and the total radiation efficiency of the NR band is -6.5dB, which is about 2dB higher than that of general projects. The WIFI 2.4G & GPS antenna is essentially a slotted loop antenna. During debugging, an inductor-capacitor oscillation circuit is used to form a dual resonance at the desired frequency band position, as shown in Figure 9. The circuit diagram of the WIFI 2.4G & GPS antenna inductor-capacitor oscillation circuit is shown in Figure 10. Then, the antenna resonance is tuned to the specified position of the desired frequency band by utilizing the different effects of inductors and capacitors on different frequency bands. The return loss diagram of the WIFI 2.4G & GPS antenna after debugging is shown in Figure 11, and the total radiation efficiency diagram of the WIFI 2.4G & GPS antenna after debugging is shown in Figure 12. The efficiency at the GPS frequency point is -3.4dB, and the efficiency at the WIFI 2.4 frequency band is -4.4dB, which is about 1-2dB higher than that of general projects.

[0037] As can be seen from the above, this utility model provides an MDA mid-frame antenna assembly for 5G mobile terminals. By setting up mutually cooperating NR main transmitting antenna, mid-to-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna within the 5G mobile terminal, and using MDA technology to directly integrate the NR main transmitting antenna, mid-to-high frequency receiving antenna, WIFI 5G & NR receiving antenna, and WIFI 2.4G & GPS antenna into the mid-frame of the 5G mobile terminal, while separating antennas of the same frequency and band, it can ensure that the total radiation efficiency of the MDA mid-frame antenna assembly for 5G mobile terminals meets people's comprehensive needs without causing mutual interference between adjacent antennas. This solves the problems of poor total radiation efficiency and mutual interference between multiple antennas in many existing antenna solutions.

[0038] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. An MDA mid-frame antenna assembly for a 5G mobile terminal, characterized in that: The device includes an NR main transmitting antenna, a mid-to-high frequency receiving antenna, a 5G & NR WIFI receiving antenna, and a 2.4G & GPS WIFI antenna. These antennas are directly integrated into the mid-frame of the 5G mobile terminal using MDA technology and work together. They are electrically connected to the main control circuit board within the 5G mobile terminal. The NR main transmitting antenna is located on the inner top of the metal frame of the 5G mobile terminal, and the mid-to-high frequency receiving antenna is located on the inner side of the side of the metal frame. The WIFI 2.4G & GPS antenna is located between the NR main transmitting antenna and the mid-to-high frequency receiving antenna. The WIFI 5G & NR receiving antenna is located between the WIFI 2.4G & GPS antenna and the mid-to-high frequency receiving antenna. A receiving antenna return point is provided between the WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna. The WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna are fixedly connected at the receiving antenna return point. The NR main transmitting antenna has a main transmitting antenna return point and a main transmitting antenna feed point for signal extraction. The distance between the main transmitting antenna feed point and the main transmitting antenna return point is d1, and the value of d1 is in the range of 3mm ≤ d1 ≤ 10mm.

2. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 1, characterized in that: The distance d1 between the main transmitting antenna feed point and the main transmitting antenna return point is 4mm.

3. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 2, characterized in that: The NR main transmitting antenna has the characteristics of an inverted F antenna and its length is selected as 18mm.

4. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 3, characterized in that: The operating frequency bands of the NR main transmitting antenna include N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz and N79: 4.4GHz-5GHz.

5. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 4, characterized in that: The mid-to-high frequency receiving antenna is a slotted loop antenna, and the operating frequency bands of the mid-to-high frequency receiving antenna include B / N1: 1.92GHz-2.17GHz, B / N3: 1.71GHz-1.88GHz, B / N40: 2.3GHz-2.4GHz and B / N41: 2.496GHz-2.690GHz.

6. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 5, characterized in that: The WIFI 5G & NR receiving antenna is a loop antenna with a circumference of 9mm. The operating frequency bands of the WIFI 5G & NR receiving antenna include N77: 3.3GHz-4.2GHz, N78: 3.3GHz-3.8GHz, N79: 4.4GHz-5GHz and 5GHzWIFI: 5.15GHz-5.8GHz.

7. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 6, characterized in that: The WIFI 2.4G & GPS antenna is a slotted loop antenna, and the operating frequency band of the WIFI 2.4G & GPS antenna includes 2.4GHz WIFI: 2.4GHz-2.48GHz, GPS L1: 1575.42MHz.

8. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 7, characterized in that: The main transmitting antenna feed point is located on the inner side of the top of the metal frame of the 5G mobile terminal and extends into the interior of the 5G mobile terminal. The main transmitting antenna return point extends from the inner side of the top of the metal frame of the 5G mobile terminal into the interior of the 5G mobile terminal and is electrically connected to the grounding shell of the 5G mobile terminal.

9. The MDA mid-frame antenna assembly for a 5G mobile terminal according to claim 8, characterized in that: The receiving antenna return point extends from the connection point of the WIFI 5G & NR receiving antenna and the WIFI 2.4G & GPS antenna into the interior of the 5G mobile terminal and is electrically connected to the main control circuit board inside the 5G mobile terminal.

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