Laptop antenna module for carrier aggregation technology
By designing low-frequency, excitation, high-frequency, third-harmonic, and second-harmonic sections in the laptop antenna module, and utilizing the switching ground path and coupling mechanism, the problem of resonant mode frequency point offset in carrier aggregation technology was solved, achieving stable efficiency of multi-frequency antennas and meeting the requirements of 5CA carrier aggregation technology.
Patent Information
- Application Number
- CN202211465312.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-22
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2042-11-22
AI Technical Summary
When using carrier aggregation technology, existing laptop antenna modules suffer from frequency offset issues in the resonant modes of the 1.7GHz and 2.2GHz bands, leading to unstable antenna efficiency and making it unsuitable for 5CA carrier aggregation technology.
Design a laptop antenna module for carrier aggregation technology. By setting up a low-frequency section, an excitation section, a high-frequency section, a third harmonic section, and a second harmonic section, the equivalent ground length of the low-frequency section is changed by switching the grounding path. Combined with the coupling of the third harmonic section and the second harmonic section, the resonant mode frequency point is stabilized.
Within the same antenna space, stable efficiency of multi-frequency antennas with 5 carrier aggregation was achieved, covering a frequency band of 617MHz-5925MHz. In particular, the antenna efficiency remained stable in the frequency range of 1710MHz-2690MHz, meeting the requirements of LTE applications.
Smart Images
Figure CN115863956B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an antenna module, and more particularly to a laptop antenna module for carrier aggregation technology. Background Technology
[0002] Common wireless communication technologies used in current portable devices fall under the categories of Wireless Local Area Networks (WLANs) and Wireless Wide Area Networks (WWANs). If a laptop computer possesses both WLAN and WWAN capabilities, it must use multiple antennas or multi-band antennas to accommodate multiple channel specifications. This often results in the antennas occupying a significant amount of internal component space. WLAN is an essential wireless specification for current laptops, while WWANs include 2G, 3G, 4G LTE, and the increasingly prevalent fifth-generation mobile communication (5G).
[0003] On the other hand, for telecommunications operators, starting with fourth-generation mobile communication (4G), a practical method to increase bandwidth is carrier aggregation (CA) technology. Carrier aggregation combines carriers from different frequency bands to improve transmission efficiency and stability. However, if antennas with both wireless LAN and wireless WAN capabilities are introduced into carrier aggregation applications, more limitations are imposed on the specifications of antennas that originally used multiple frequency bands. Whether more antenna space is required is a new challenge for manufacturers. Summary of the Invention
[0004] To address the aforementioned deficiencies in the prior art, the present invention aims to provide a laptop antenna module for carrier aggregation technology, which solves the problem of resonant frequency point shift between the 1.7GHz and 2.2GHz bands when the frequency point of the low-frequency mode of the antenna changes.
[0005] The technical solution of this invention is as follows: A laptop antenna module for carrier aggregation technology is disposed inside the casing above the display screen of a laptop computer, characterized in that the laptop antenna module for carrier aggregation technology includes:
[0006] The low-frequency section, used to generate resonant modes in the frequency range of 617MHz to 960MHz, has a main path and a switching section; wherein, the main path has a first end, a second end, and two ground segments, both of which are connected between the first end and the module ground, and the second end is floating; wherein, the switching section is connected between the main path and the module ground, and the switching section conducts one of a plurality of ground paths to change the equivalent ground length of the low-frequency section;
[0007] The excitation section generates a resonant mode in the 3GHz frequency band, which is directly fed in via a coaxial cable;
[0008] The high-frequency section generates a resonant mode in the 5GHz band and is connected to the excitation section;
[0009] The third harmonic section generates a resonant mode in the 2.2 GHz band, which is connected to the high-frequency section and coupled to the main path of the low-frequency section;
[0010] The second harmonic generation produces a resonant mode in the 1.7 GHz band, connects the module to ground, and couples the main path of the low-frequency section to the third harmonic generation; and
[0011] The carrier, wherein the low-frequency section, the excitation section, the high-frequency section, the third harmonic section and the second harmonic section are disposed on the surface of the carrier;
[0012] The main path of the low-frequency section obtains the electromagnetic energy of the excitation section by coupling the third harmonic section.
[0013] Furthermore, the distance between the switching unit and the first end is less than the distance between the switching unit and the second end.
[0014] Furthermore, the equivalent grounding length of the low-frequency section is determined by the total path length from the second end through one of the plurality of grounding paths to the module grounding.
[0015] Furthermore, when the equivalent ground length of the low-frequency section increases, the center frequency of the resonant mode generated by the low-frequency section shifts towards 617MHz; when the equivalent ground length of the low-frequency section decreases, the center frequency of the resonant mode generated by the low-frequency section shifts towards 960MHz.
[0016] Furthermore, the resonant mode of the 1.7GHz band is the second harmonic of the resonant mode from 617MHz to 960MHz, and the resonant mode of the 2.2GHz band is the third harmonic of the resonant mode from 617MHz to 960MHz.
[0017] Furthermore, when the equivalent ground length of the low-frequency section changes, the variation amplitude of the higher-order mode frequency point of the resonant mode of the low-frequency section is reduced by the coupling of the third harmonic section and the second harmonic section, so as to stabilize the antenna efficiency in the frequency range of 1710MHz to 2690MHz, so as to meet the use of 5CA carrier aggregation technology in the frequency range of 1710MHz to 2690MHz.
[0018] Furthermore, the module ground is located on the lower surface of the laptop antenna module used for carrier aggregation technology.
[0019] Furthermore, the carrier has a long side, a wide side, and a high side. The long side is parallel to the X-axis, the wide side is parallel to the Y-axis, and the high side is parallel to the Z-axis. The high-frequency section and the excitation section extend in the same direction parallel to the X-axis, wherein the extension direction of the third harmonic section is opposite to the extension direction of the high-frequency section.
[0020] Furthermore, it includes a signal grounding portion adjacent to the excitation portion, the excitation portion being connected to the center conductor of the coaxial cable, and the signal grounding portion being connected to the outer conductor of the coaxial cable.
[0021] Furthermore, the carrier has a long side, a wide side, and a high side. The long side is parallel to the X-axis, the wide side is parallel to the Y-axis, the high side is parallel to the Z-axis, the main path is parallel to the X-axis, and the two grounding segments are parallel to the Y-axis. The two grounding segments are located on opposite sides of the carrier, and the projections of the two grounding segments on the XY plane overlap. The lengths of the long side, the wide side, and the high side are 69 mm, 7 mm, and 3 mm, respectively.
[0022] The advantages of this invention compared to the prior art are:
[0023] This invention utilizes switching the grounding path to change the shortest grounding path in the low-frequency section, thereby altering the equivalent grounding length of the low-frequency section. When the equivalent grounding length of the low-frequency section changes, it reduces the resonant frequency shift of the resonant modes in the 1.7GHz and 2.2GHz bands, maintaining stable antenna efficiency from 1710MHz to 2690MHz. This ensures that the antenna meets the requirements for 5CA carrier aggregation technology within the 1710MHz to 2690MHz frequency range. Compared to traditional antennas, this invention provides a multi-frequency antenna capable of achieving 5 carrier aggregation within the same antenna space. The available frequency bands also comply with LTE applications, specifically including 617MHz-960MHz and 1710MHz to 5925MHz. Particularly in the second and third harmonics range of 1710MHz-2690MHz, the antenna efficiency remains remarkably stable under different switching states, demonstrating significant industrial application value. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of a laptop computer provided in an embodiment of the present invention.
[0025] Figure 2 This is a front view of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0026] Figure 3 This is a three-dimensional schematic diagram of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0027] Figure 4This is another perspective view of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0028] Figure 5 This is a graph of the S11 parameters of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0029] Figure 6 This is a top view of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0030] Figure 7 This is a bottom view of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0031] Figure 8 This is a rear view of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention.
[0032] Figure 9 This is an antenna efficiency diagram of a laptop antenna module for carrier aggregation technology provided in an embodiment of the present invention across the entire frequency band.
[0033] Figure 10 This is a graph showing the antenna efficiency of a laptop antenna module for carrier aggregation technology provided in this embodiment of the invention in the local frequency range of 617MHz to 960MHz.
[0034] Figure 11 This is a graph showing the antenna efficiency of a laptop antenna module for carrier aggregation technology provided in this embodiment of the invention in the local frequency range of 1710MHz to 2690MHz. Detailed Implementation
[0035] The present invention will be further described below with reference to embodiments, but these are not intended to limit the scope of the invention.
[0036] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a laptop computer. The laptop antenna module 1, used for carrier aggregation technology, is located within the casing 210 above the display screen 21 of the laptop computer 2. Please refer to... Figure 2 , Figure 3 and Figure 4This module includes a low-frequency section 11, an excitation section 12, a high-frequency section 13, a third harmonic section 14, a second harmonic section 15, and a carrier 10. The low-frequency section 11, excitation section 12, high-frequency section 13, third harmonic section 14, and second harmonic section 15 are disposed on the surface of the carrier 10, which can be a laser-engraved insulating substrate. The aforementioned low-frequency section 11, excitation section 12, high-frequency section 13, third harmonic section 14, and second harmonic section 15 are laser-engraved onto the carrier 10. The low-frequency section 11 is used to generate resonant modes in the frequency range of 617MHz to 960MHz and has a main path 111 and a switching section 112. The 617MHz to 960MHz resonant modes are the fundamental resonant modes of the low-frequency section 11, which will be explained later. (Refer to...) Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 The main path 111 is distributed on the front, top, and back surfaces, with the portion on the front visible. Figure 2 and Figure 3 The upper surface portion is visible in Figure 4 3D diagram and Figure 6 The top view image; for the rear view, please see... Figure 8 The main path 111 has a first end 111a, a second end 111b, and two grounding sections 111c and 111d. The portion from the first end 111a to the second end 111b is roughly elongated. When this elongated portion is connected to grounding section 111c or 111d, it roughly forms an L-shape (or an inverted L-shape). Grounding section 111c is on the front side, see... Figure 2 Grounding section 111d is on the back side and can be seen in Figure 8 Both grounding sections 111c and 111d are connected between the first terminal 111a and the module grounding G, while the second terminal 111b is floating. Furthermore, the switching unit 112 is another grounding structure, which will be described later.
[0037] In practical applications, the module ground G is typically located on the lower surface of the laptop antenna module used for carrier aggregation technology, as shown in the reference. Figure 3 3D diagram and Figure 7 The bottom view shows that the module ground G is located on the lower surface. To connect the module ground G to the system ground of the system circuit board and achieve common ground, a grounding copper foil is used to connect the module ground G. The grounding copper foil can be glued or soldered to the module ground G, and then the grounding copper foil is fixed to the system circuit board (or its surrounding grounding metal) by soldering or metal fasteners. This also helps to stabilize the grounding characteristics after assembly.
[0038] Reference Figure 2 and Figure 3The switching unit 112 is connected between the main path 111 and the module ground G. The switching unit 112 conducts one of the plurality of grounding paths to change the equivalent grounding length of the low-frequency section 11. The equivalent grounding length of the low-frequency section 11 is determined by the total path length from the second end 111b through one of the plurality of grounding paths to the module ground G. In this embodiment, four different grounding paths P1, P2, P3, and P4 are used as examples. The grounding paths can be conductors of different lengths or grounding paths connected to different positions on the main path 111, as long as any grounding path can cause a different grounding length when short-circuited. This will result in different equivalent grounding lengths, causing the center frequency of the fundamental resonant mode of the low-frequency section 11 to change. Preferably, the distance between the switching unit 112 and the first end 111a is smaller than the distance between the switching unit 112 and the second end 111b.
[0039] Furthermore, the fundamental resonant mode generated by the low-frequency section 11 covers a frequency band from 617MHz to 960MHz. Since this frequency band requires a large bandwidth, conventionally large antennas would occupy a considerable amount of space. Later, many switching designs were developed as improved alternatives, allowing the antenna's resonant mode to vary within the 617MHz to 960MHz range. No single mode needs to cover the entire frequency range; all modes only need to collectively cover the entire frequency range. Then, the frequency points of the modes only need to be changed according to the usage conditions, thus significantly reducing the antenna size. However, this also results in significant changes to the frequency points of the higher-order modes of the low-frequency antenna (corresponding to the low-frequency section of this invention). Such conventional techniques are difficult to use in carrier aggregation technology. This invention further improves upon conventional techniques, and the significant differences between this invention and conventional techniques will be explained later.
[0040] Regarding the mode switching section, taking the use of six modes covering a frequency range of 617-960MHz (with S11 specifications defined as -5dB) as an example, please refer to... Figure 5The S11 parameter curve shows that the low-frequency section 11 is a coupled antenna, with energy derived from the coupling of the third harmonic section 14 and the second harmonic section 15 (its excitation energy originates from the excitation section 12). The mode varying between 617MHz and 960MHz is the fundamental resonant mode of the low-frequency section 11. The length of the main path 111 is approximately 63 mm, and the length of the grounding section is approximately 7 mm (the length of each grounding segment 111c or 111d from the main path 111 to the module grounding G). The sum of these two lengths indicates that the total length of the low-frequency section 11 is slightly shorter than a quarter wavelength of the center frequency corresponding to the fundamental mode. This grounding structure design helps to shorten the antenna size, but it still belongs to quarter-wavelength resonance. When the equivalent grounding length of the low-frequency section 11 increases, the center frequency of the resonant mode generated by the low-frequency section 11 shifts towards 617MHz. When the equivalent grounding length of the low-frequency section 11 decreases, the center frequency of the resonant mode generated by the low-frequency section 11 shifts towards 960MHz.
[0041] Refer to Figure 3 The excitation section 12 is used not only to connect the input signal but also to generate a resonant mode in the 3GHz band due to the input signal. The excitation section 12 is directly fed into the coaxial cable CB. Preferably, because of the coaxial cable CB feeding method, this module also includes a signal ground section SG adjacent to the excitation section 12. The excitation section 12 is connected to the center conductor C1 of the coaxial cable CB, and the signal ground section SG is connected to the outer conductor R1 of the coaxial cable CB. In actual products, the signal ground section SG is also connected to a grounding copper foil to share a common ground with the module ground G.
[0042] Continue to refer to Figure 2 , Figure 3 and Figure 4 The high-frequency section 13 generates a resonant mode in the 5GHz band, with an operating frequency range up to 5925MHz, and is connected to the excitation section 12. The third harmonic section 14 generates a resonant mode in the 2.2GHz band, and is connected to the high-frequency section 13, coupling the main path 111 of the low-frequency section 11 (see reference). Figure 4 The second harmonic section 15 generates a resonant mode in the 1.7 GHz band, and the second harmonic section 15 is connected to the ground module G, coupling the main path 111 of the low-frequency section 11 to the third harmonic section 14 (see reference). Figure 4 In detail, the second harmonic section 15 has a ground terminal 151 and a coupling terminal 152. The coupling terminal 152 couples the main path 111 of the third harmonic section 14 and the low-frequency section 11. The main path 111 of the low-frequency section 11 obtains the electromagnetic energy of the excitation section 12 by coupling the third harmonic section 14. The second harmonic section 15 obtains the electromagnetic energy of the excitation section 12 by coupling the main path 111 and the third harmonic section 14. Both the third harmonic section 14 and the second harmonic section 15 generate their own resonant modes, and each has a significant influence on the higher-order modes of the low-frequency section 11, which will be explained later.
[0043] Continue to refer to Figure 3 and Figure 4 A 3D diagram, with reference Figure 2 Front view, Figure 6 The image above, Figure 7 The image below, Figure 8 The diagram shows the back of the carrier 10. As can be seen, the low-frequency section 11 is located on the front, back, and top surface of the carrier 10. The main path 111 is distributed not only on the front and back but also on the top surface. The switching section 112 is mainly on the front, the grounding section 111c is on the front, and the grounding section 111d is on the back. The excitation section 12, the high-frequency section 13, the third harmonic section 14, and the second harmonic section 15 are located on the front of the carrier 10. Depending on the actual product design, the front of the carrier 10 is a non-planar surface with irregularities to increase the flexibility of component assembly and antenna design. The other surfaces of the carrier 10 can also be non-planar, similarly to increase the flexibility of component assembly and antenna design.
[0044] Refer again Figure 5 In this embodiment, the low-frequency section 11 has usable higher-order modes at frequencies around 1.7 GHz (second harmonic) and 2.2 GHz (third harmonic). Simply put, the resonant mode in the 1.7 GHz band is the second harmonic of the resonant mode in the 617 MHz to 960 MHz range, and the resonant mode in the 2.2 GHz band is the third harmonic of the resonant mode in the 617 MHz to 960 MHz range. When the switching section 112 changes the frequency point (center frequency) of the fundamental mode of the resonant mode of the low-frequency section 11, it can be seen that the frequency points of the higher-order modes at 1.7 GHz and 2.2 GHz do not change significantly with the impedance matching. The reason and principle for this are explained below. Compared to conventional designs, the embodiment of this invention generally uses direct excitation of the low-frequency section 11 (directly fed in using a coaxial cable as the feed line). In conventional designs, the higher-order modes change frequency with the fundamental mode, and the frequency point changes of the higher-order modes are greater than those of the fundamental mode. This is the difference between conventional designs and this invention, and it is also the part of this invention that produces specific and beneficial effects. Furthermore, if a traditional design is used (using coaxial cable for direct feeding to excite the low-frequency section), when switching low frequencies (617MHz to 960MHz), in each switching state, only a few frequency bands within the 1710MHz to 2690MHz frequency range where the higher-order modes are located can be used at any given time (depending on the frequency shift of the higher-order modes). Therefore, with traditional technology, not all frequency bands within the 1710MHz to 2690MHz range can be used simultaneously in any low-frequency switching state (the impedance matching degree of each band is significantly different, resulting in large differences in antenna efficiency), making it impossible to use multiple frequency bands for carrier aggregation.
[0045] Compared to the characteristics of traditionally designed antennas, the present invention... Figure 5The S11 curve clearly shows that regardless of the low-frequency switching, the frequency points of the 1.7GHz and 2.2GHz modes remain essentially unchanged, and the impedance matching degree within the frequency range of 1710MHz to 2690MHz is basically the same (taking S11 meeting the -5dB specification as an example). Further reference can be made to the subsequent antenna efficiency curve (…). Figure 11 It can be observed that the antenna efficiency is roughly the same from 1710MHz to 2690MHz. The design principle of this embodiment is that when the equivalent grounding length of the low-frequency section 11 changes, the frequency variation amplitude of the higher-order mode of the low-frequency resonant mode of the low-frequency section 11 is reduced by the coupling of the third harmonic section 14 and the second harmonic section 15. The coupling of the second harmonic section 15 (coupling main path 111) reduces the frequency variation amplitude of the second harmonic of the higher-order mode (at 1.7GHz). The coupling of the third harmonic section 14 (coupling main path 111) reduces the frequency variation amplitude of the third harmonic of the higher-order mode (at 2.2GHz). Furthermore, both the third harmonic section 14 and the second harmonic section 15 generate their own resonant modes; the third harmonic section 14 generates a resonant mode near 2.2GHz, and the second harmonic section 15 generates a resonant mode near 1.7GHz. In detail, the second harmonic section 15 and the third harmonic section 14 are parallel and close to the main path 111, resulting in strong coupling. When the switching section 112 changes the length of the ground path, the degree of change in the current mode of the second and third harmonics on the main path 111 is significantly reduced due to the strong coupling, thus stabilizing the antenna efficiency in the frequency range of 1710MHz to 2690MHz, so as to meet the requirements of 5CA carrier aggregation technology in the frequency range of 1710MHz to 2690MHz. On a similar principle, due to the strong coupling, the resonant modes generated by the third harmonic section 14 and the second harmonic section 15 (which are also around 2.2GHz and 1.7GHz, respectively) are not affected by the switching, maintaining a stable frequency point and antenna efficiency. Furthermore, the frequency of the resonant mode of the third harmonic section 14 is quite close to the frequency of the third harmonic higher-order mode of the low-frequency section 11 (2.2 GHz), and the frequency of the resonant mode of the second harmonic section 15 is quite close to the frequency of the second harmonic higher-order mode of the low-frequency section 11 (1.7 GHz). Therefore, overall, the antenna efficiency is stabilized in the frequency range of 1710 MHz to 2690 MHz.
[0046] The 5CA (Five-Carrier Aggregation) refers to the aggregation of five carriers, each using a different frequency band. This allows for aggregation of five frequency bands, ensuring stable antenna efficiency across the five bands used simultaneously, unaffected by low-frequency handover. These five frequency bands can be any five intervals within the 1710MHz to 2690MHz frequency range. These intervals are typically government-licensed frequency bands held by different telecommunications operators based on commercial market practices. If a single telecommunications operator holds five frequency bands, they can aggregate these five bands to improve the quality of telecommunications services. In contrast, traditional technologies cannot achieve the five-carrier aggregation effect when the carriers in each frequency band containing higher-order modes are significantly affected by low-frequency handover. Therefore, this invention demonstrates a significant advantage.
[0047] In terms of the detailed structure of this module embodiment, the carrier 10 has a long side L, a wide side W, and a high side D. The long side L is parallel to the X-axis, the wide side W is parallel to the Y-axis, and the high side D is parallel to the Z-axis. Figure 3 The length of the carrier 10 is longer than the indicated L because there is space on both sides of the carrier 10 without antenna patterns to facilitate assembly and avoid contact with the antenna during assembly. This reserved space is solely for assembly and does not belong to the antenna's space requirements. In other words, the structural portion of the carrier 10 that exceeds the longer side L is only for assembly purposes and its size is variable, unrelated to the antenna size limitations of the antenna design. The high-frequency section 13 and the excitation section 12 extend in the same direction parallel to the X-axis, while the third harmonic section 14 extends in the opposite direction to the high-frequency section 13. Furthermore, the main path 111 is parallel to the X-axis, and the two grounding segments 111c and 111d are parallel to the Y-axis. The two grounding segments 111c and 111d are located on opposite sides (front and back) of the carrier 10, and the projections of the two grounding segments 111c and 111d in the XY plane overlap. For example, the grounding segment 111c on the front falls into the projection of the grounding segment 111d on the back. Preferably, when the long side L, wide side W, and high side D are defined based on the surface of the carrier 10 occupied by the antenna pattern, the lengths of the long side L, wide side W, and high side D only need to be 69 mm, 7 mm, and 3 mm, respectively. In terms of antenna size, compared with conventional technologies that provide the same bandwidth function, the embodiments of the present invention can achieve a smaller size.
[0048] Reference Figures 9 to 11 Taking the comparison of product specifications using three switching modes as an example, the thick solid line represents the product specifications defined by a certain laptop brand manufacturer (labeled as: Specifications), and the other three lines represent the antenna efficiency of the three switching modes (labeled as: Mode 1, Mode 2, and Mode 3, respectively). The trend of antenna efficiency shifts with the change of the center frequency point, and the frequency point with the highest antenna efficiency also shifts with the shift of the center frequency. Figure 9This refers to the antenna efficiency of the antenna module across the entire frequency band. Figure 10 It is evident that the antenna efficiency of the low-frequency resonant mode varies significantly across different switching modes of the switching unit 112, compared to... Figure 10 The switching result Figure 11 It is evident that regardless of how the switching unit 112 switches, the antenna efficiency in the frequency range of 1710MHz to 2690MHz still largely meets the product specifications. More importantly, the antenna efficiency varies considerably between different switching states, which is sufficient to be applicable to carrier aggregation technology and can at least meet the requirements of 5CA.
[0049] In summary, the laptop antenna module for carrier aggregation technology provided by this invention utilizes switching the grounding path to change the shortest grounding path in the low-frequency section, thereby altering the equivalent grounding length of the low-frequency section. When the equivalent grounding length of the low-frequency section changes, the resonant frequency shift of the resonant modes in the 1.7GHz and 2.2GHz bands is reduced, maintaining stable antenna efficiency from 1710MHz to 2690MHz. This ensures that the frequency range of 1710MHz to 2690MHz meets the requirements for 5CA carrier aggregation technology. Compared to traditional antennas, within the same antenna space, this invention provides a multi-frequency antenna capable of achieving 5 carrier aggregations, and the available frequency bands simultaneously comply with LTE applications. Detailed available frequency bands include 617MHz-960MHz and 1710MHz to 5925MHz. Particularly in the second and third harmonics range of 1710MHz-2690MHz, the antenna efficiency remains remarkably stable under different switching states, demonstrating high industrial application value.
Claims
1. A laptop antenna module for carrier aggregation technology, disposed within the casing above the laptop screen, characterized in that, The laptop antenna module for carrier aggregation technology includes: The low-frequency section, used to generate resonant modes in the frequency range of 617MHz to 960MHz, has a main path and a switching section; wherein, the main path has a first end, a second end, and two ground segments, both of which are connected between the first end and the module ground, and the second end is floating; wherein, the switching section is connected between the main path and the module ground, and the switching section conducts one of a plurality of ground paths to change the equivalent ground length of the low-frequency section; The excitation section generates a resonant mode in the 3GHz frequency band, which is directly fed in via a coaxial cable. The high-frequency section generates a resonant mode in the 5GHz band and is connected to the excitation section; The third harmonic section generates a resonant mode in the 2.2 GHz band, which is connected to the high-frequency section and coupled to the main path of the low-frequency section; The second harmonic generation produces a resonant mode in the 1.7 GHz band, connects the module to ground, and couples the main path of the low-frequency section to the third harmonic generation; and The carrier, wherein the low-frequency section, the excitation section, the high-frequency section, the third harmonic section and the second harmonic section are disposed on the surface of the carrier; The main path of the low-frequency section obtains the electromagnetic energy of the excitation section by coupling the third harmonic section.
2. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The distance between the switching part and the first end is less than the distance between the switching part and the second end.
3. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The equivalent grounding length of the low-frequency section is determined by the total path length from the second end through one of the plurality of grounding paths to the ground of the module.
4. The laptop antenna module for carrier aggregation technology according to claim 3, characterized in that, When the equivalent ground length of the low-frequency section increases, the center frequency of the resonant mode generated by the low-frequency section shifts towards 617MHz; when the equivalent ground length of the low-frequency section decreases, the center frequency of the resonant mode generated by the low-frequency section shifts towards 960MHz.
5. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The resonant mode of the 1.7 GHz band is the second harmonic of the resonant mode from 617 MHz to 960 MHz, and the resonant mode of the 2.2 GHz band is the third harmonic of the resonant mode from 617 MHz to 960 MHz.
6. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, When the equivalent ground length of the low-frequency section changes, the variation amplitude of the higher-order mode frequency point of the resonant mode of the low-frequency section is reduced by the coupling of the third harmonic section and the second harmonic section, so as to stabilize the antenna efficiency in the frequency range of 1710MHz to 2690MHz, so as to meet the use of 5CA carrier aggregation technology in the frequency range of 1710MHz to 2690MHz.
7. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The module ground is located on the lower surface of the laptop antenna module used for carrier aggregation technology.
8. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The carrier has a long side, a wide side, and a high side. The long side is parallel to the X-axis, the wide side is parallel to the Y-axis, and the high side is parallel to the Z-axis. The high-frequency section and the excitation section extend in the same direction parallel to the X-axis, wherein the extension direction of the third harmonic section is opposite to the extension direction of the high-frequency section.
9. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, It includes a signal grounding portion adjacent to the excitation portion, the excitation portion being connected to the center conductor of the coaxial cable, and the signal grounding portion being connected to the outer conductor of the coaxial cable.
10. The laptop antenna module for carrier aggregation technology according to claim 1, characterized in that, The carrier has a long side, a wide side, and a high side. The long side is parallel to the X-axis, the wide side is parallel to the Y-axis, the high side is parallel to the Z-axis, the main path is parallel to the X-axis, and the two grounding segments are parallel to the Y-axis. The two grounding segments are located on opposite sides of the carrier, and the projections of the two grounding segments on the XY plane overlap. The lengths of the long side, the wide side, and the high side are 69 mm, 7 mm, and 3 mm, respectively.
Citation Information
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