Electronic devices
The electronic device integrates a multi-loop antenna module with multiple frequency bands by using a ground plane and recessed antenna structure, addressing the need for compact and efficient antenna performance across different frequency bands.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PEGATRON
- Filing Date
- 2025-10-08
- Publication Date
- 2026-06-02
AI Technical Summary
Existing electronic devices lack an efficient antenna module capable of supporting multiple frequency bands within a compact design.
The electronic device incorporates a ground plane with a recess housing an antenna module comprising multiple radiators and electronic components forming interconnected loops that resonate at different frequency bands, allowing for a multi-loop and multi-frequency band antenna module.
The design achieves a compact, planar, and efficient multi-frequency band antenna module with reduced hand effect, suitable for various device shapes and improved user experience, while maintaining high antenna efficiency and VSWR performance.
Smart Images
Figure 2026090193000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an electronic device, and particularly to an electronic device having an antenna module with multiple loops and multiple frequency bands.
Background Art
[0002] With the progress of science and technology, the transmission and reception of wireless signals using antennas are extremely common. How to provide an antenna with multiple frequency bands is a research direction in this field.
Summary of the Invention
Problems to be Solved by the Invention
[0003] The present invention provides an electronic device having an antenna module with multiple loops and multiple frequency bands.
Means for Solving the Problems
[0004] The electronic device of the present invention includes a ground plane and an antenna module. The ground plane has a recess, and the antenna module is installed in the recess and includes a first radiator, a first electronic member, a second radiator, a second electronic member, a third electronic member, a third radiator, a fourth electronic member, a fourth radiator, and a fifth electronic member. The first radiator includes a feed end. The first electronic member connects the feed end and the ground plane. The second electronic member connects the first radiator and the second radiator. The third electronic member connects the second radiator and the ground plane. The first electronic member, the first radiator, the second electronic member, the second radiator, and the third electronic member form a first loop, and the first loop resonates at a first frequency band. The third radiator is connected to the first radiator. The fourth electronic member connects the third radiator and the ground plane. The first electronic member, the first radiator, the third radiator, and the fourth electronic member form a second loop, and the second loop resonates at a second frequency band. The fourth radiator is connected to the feed end. The fifth electronic member connects the fourth radiator and the ground plane. The first electronic member, the feed end, the fourth radiator, and the fifth electronic member form a third loop, and the third loop resonates at a third frequency band.
[0005] In one embodiment of the present invention, the recess includes a first edge, a second edge, and a third edge, the first electronic member is connected to the second edge, and the first edge is closer to the first electronic member than the third edge.
[0006] In one embodiment of the present invention, the second edge includes a first end and a second end, the first end is connected to the first edge, the second end is connected to the third edge, and the distance between the first electronic member and the first end is 0.4 to 0.6 times the distance between the first electronic member and the second end.
[0007] In one embodiment of the present invention, the third electronic component is connected to the third edge, the fourth electronic component is connected to the first edge, and the fifth electronic component is connected to the second edge.
[0008] In one embodiment of the present invention, the length of the first loop is 1 / 8 the wavelength of the first frequency band, the length of the second loop is 1 / 8 the wavelength of the second frequency band, and the length of the third loop is 1 / 8 the wavelength of the third frequency band.
[0009] In one embodiment of the present invention, the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5000MHz and 6500MHz, and the third frequency band is between 6500MHz and 8000MHz.
[0010] In one embodiment of the present invention, the first electronic component includes an inductance, and each of the second, third, fourth, and fifth electronic components includes a capacitance.
[0011] In one embodiment of the present invention, the electronic device further includes a fifth radiator and a sixth electronic component. The fifth radiator is connected to the first radiator. The sixth electronic component is connected to the fifth radiator and to the ground surface.
[0012] In one embodiment of the present invention, the electronic device further includes a sixth radiator and a seventh electronic component. The sixth radiator is connected to the first radiator. The seventh electronic component is connected to the sixth radiator and to the ground surface.
[0013] In one embodiment of the present invention, each of the sixth electronic component and the seventh electronic component includes capacitance. [Effects of the Invention]
[0014] Based on the above, the first electronic component of the electronic device of the present invention is connected to the feed end of the first radiator and the ground plane. The second electronic component is connected to the first radiator and the second radiator. The third electronic component is connected to the second radiator and the ground plane. The first electronic component, the first radiator, the second electronic component, the second radiator, and the third electronic component form a first loop, and the first loop resonates in the first frequency band. The third radiator is connected to the first radiator. The fourth electronic component is connected to the third radiator and the ground plane. The first electronic component, the first radiator, the third radiator, and the fourth electronic component form a second loop, and the second loop resonates in the second frequency band. The fourth radiator is connected to the feed end. The fifth electronic component is connected to the fourth radiator and the ground plane. The first electronic component, the feed end, the fourth radiator, and the fifth electronic component form a third loop, and the third loop resonates in the third frequency band. The electronic device of the present invention, with the above design, can form a multi-loop and multi-frequency band antenna module. [Brief explanation of the drawing]
[0015] [Figure 1] This is a schematic diagram of an electronic device according to one embodiment of the present invention. [Figure 2] This is a close-up view of a specific area shown in Figure 1. [Figure 3A] Figure 1 is a schematic diagram of the first loop. [Figure 3B] Figure 1 is a schematic diagram of the second loop. [Figure 3C] Figure 1 is a schematic diagram of the third loop. [Figure 4] Figure 1 shows the relationship between frequency and VSWR of the electronic device. [Figure 5] Figure 1 shows the relationship between frequency and antenna efficiency of the electronic device. [Figure 6] This is a schematic diagram of an electronic device based on another embodiment of the present invention. [Modes for carrying out the invention]
[0016] Figure 1 is a schematic diagram of an electronic device based on one embodiment of the present invention. Figure 2 is a close-up view of Figure 1. Referring to Figures 1 and 2, the electronic device 10 of this embodiment is, for example, a stylus pen, and Figure 1 shows, for example, a circuit board structure inside the stylus pen, but the type of electronic device 10 is not limited thereto. The electronic device 10 includes a grounding surface 20 and an antenna module 100. The grounding surface 20 is, for example, the grounding layer of the circuit board, and in another embodiment, the grounding surface 20 may be a metal frame or the like, and is not limited thereto.
[0017] The antenna module 100 is installed in a recess 30 of the ground surface 20, the recess 30 including a first edge 31 (positions G5, G4 in Figure 2), a second edge 32 (positions G4, G1, G6, G2 in Figure 2), and a third edge 35 (positions G2, G3 in Figure 2). In this embodiment, the length L1 of the ground surface 20 is, for example, 58.4 millimeters, the width L2 of the ground surface 20 is, for example, 8.9 millimeters, the length L3 of the recess 30 is, for example, 12.5 millimeters, and the width L4 of the recess 30 is, for example, 3 millimeters, but these values are not limited thereto.
[0018] As shown in Figure 2, the antenna module 100 includes a first radiator 110 (positions A1, A2), a first electronic component 171, a second radiator 120 (positions B1, B2), a second electronic component 172, a third electronic component 173, a third radiator 130 (positions A2, A3), a fourth electronic component 174, a fourth radiator 140 (positions A1, A4), and a fifth electronic component 175.
[0019] Figures 3A to 3C are schematic diagrams of the first loop to the third loop in FIG. 1. First, referring to FIG. 3A, the first radiator 110 includes a feed end (position A1). The feed end of the antenna module 100 is electrically connected to the positive terminal of the signal source in order to receive the signal of the chip 40. Further, the negative terminal of the signal source is connected to the system ground plane 20 at positions G1, G3, G5, and G6 of the antenna module 100.
[0020] The first electronic member 171 connects the feed end and the ground plane 20. In the present embodiment, the first electronic member 171 is connected to the second edge 32 of the recess 30, and the first edge 31 is closer to the first electronic member 171 than the third edge 35.
[0021] More specifically, the second edge 32 includes a first end 33 and a second end 34. The first end 33 is connected to the first edge 31, the second end 34 is connected to the third edge 35, and the distance between the first electronic member 171 and the first end 33 is 0.4 to 0.6 times the distance between the first electronic member 171 and the second end 34.
[0022] The second electronic member 172 connects the first radiator 110 and the second radiator 120. The third electronic member 173 connects the second radiator 120 and the third edge 35 of the ground plane 20.
[0023] In the present embodiment, the first electronic member 171 includes an inductance, and each of the second electronic member 172 and the third electronic member 173 includes a capacitance. The inductance value of the first electronic member 171 is between 1 and 1.5 nH, for example, 1.2 nH, but is not limited thereto. The capacitance value of the second electronic member 172 is, for example, 180 pF, but is not limited thereto. The capacitance value of the third electronic member 173 is, for example, between 0.2 and 0.4 pF, for example, 0.3 pF, but is not limited thereto.
[0024] In this embodiment, the first electronic component 171, the first radiator 110, the second electronic component 172, the second radiator 120, and the third electronic component 173 form a first loop, and the first loop resonates in the first frequency band.
[0025] Specifically, in this embodiment, the first frequency band is between 2400 MHz and 2500 MHz, and the length of the first loop is 1 / 8 the wavelength of the first frequency band. Of course, the range of the first frequency band and the length of the first loop are not limited to these values.
[0026] Referring to Figure 3B, the third radiator 130 is connected to the first radiator 110. The fourth electronic component 174 connects the third radiator 130 to the first edge 31 of the ground surface 20. In this embodiment, the fourth electronic component 174 includes capacitance. The capacitance value of the fourth electronic component 174 is between 0.05 and 0.15 pF, for example, 0.1 pF, but is not limited to this.
[0027] The first electronic component 171, the first radiator 110, the third radiator 130, and the fourth electronic component 174 form a second loop, which resonates in a second frequency band. In this embodiment, the second frequency band is between 5000 MHz and 6500 MHz, and the length of the second loop is 1 / 8 the wavelength of the second frequency band. Of course, the range of the second frequency band and the length of the second loop are not limited thereto. The effect of the second electronic component 172 is to prevent the second loop from being affected by the first loop.
[0028] Referring to Figure 3C, the fourth radiator 140 is connected to the feed end. The fifth electronic component 175 connects the fourth radiator 140 to the second edge 32 of the ground surface 20. In this embodiment, the fifth electronic component 175 includes capacitance. The capacitance value of the fifth electronic component 175 is, for example, between 0.1 and 0.3 pF, and is not limited to, for example, 0.2 pF.
[0029] The first electronic component 171, the feed end, the fourth radiator 140, and the fifth electronic component 175 form a third loop, which resonates in the third frequency band. In this embodiment, the third frequency band is between 6500 MHz and 8000 MHz, and the length of the third loop is 1 / 8 the wavelength of the third frequency band. Of course, the range of the third frequency band and the length of the third loop are not limited thereto.
[0030] The electronic device 10 of this embodiment integrates the first, second, and third loops described above to form a multi-loop antenna structure, possesses the characteristics of a planar, compact, multi-frequency band antenna design, and is applicable to any external design including cylindrical, thin and flat, or prismatic shapes. It is applicable not only to stylus pens but also to other wireless communication products and devices (e.g., tablet computers, laptop computers, etc.).
[0031] Figure 4 is a frequency-VSWR relationship diagram of the electronic device in Figure 1. Referring to Figure 4, in this embodiment, the electronic device 10 has good performance, with a VSWR of 4 or less for both the low-frequency band WiFi 2.4G and the high-frequency band WiFi 5G / 6E / 7, despite the limited dimensions of the recess 30 width L4 being only 3 millimeters.
[0032] Figure 5 is a diagram showing the frequency-antenna efficiency relationship of the electronic device in Figure 1. Referring to Figure 5, in this embodiment, the electronic device 10 has good antenna performance, with an antenna efficiency of -4.6 to -5.7 dBi for low-frequency band WiFi 2.4 G and an antenna efficiency of -3.0 to -4.8 dBi for high-frequency band WiFi 5 G / 6 E / 7. In other words, the electronic device 10 can have broadband and good antenna efficiency characteristics within the space of the extremely small recess 30.
[0033] Furthermore, the electronic device 10 of this embodiment can be fitted with a MIMO multi-antenna structure. The antenna module 100 shown in Figure 2 can be placed as the main antenna near the tip of the stylus, and another antenna module 100 shown in Figure 2 can be placed separately as an auxiliary antenna near the tip of the stylus. Because the volume of the antenna module 100 is small, the effect of holding the device in the hand (body effect) can be reduced, satisfying the need for multi-antenna performance and improving the user experience.
[0034] Figure 6 is a schematic diagram of an electronic device according to another embodiment of the present invention. Referring to Figure 6, the main difference between the electronic device 10a in Figure 6 and the electronic device 10 in Figure 2 is that in this embodiment, the electronic device 10a further includes a fifth radiator 150, a sixth electronic component 176, a sixth radiator 160, and a seventh electronic component 177.
[0035] The fifth radiator 150 is connected to the first radiator 110. The sixth electronic component 176 is connected to the fifth radiator 150 and the second edge 32 of the ground surface 20. The sixth radiator 160 is connected to the first radiator 110. The seventh electronic component 177 is connected to the sixth radiator 160 and the second edge 32 of the ground surface 20. In this embodiment, the sixth electronic component 176 and the seventh electronic component 177 each include capacitance, but are not limited to this.
[0036] In this embodiment, such a design can increase the antenna resonant frequency band and is applicable to 4G / 5G antenna structures. The frequency of a 4G / 5G antenna is approximately 800MHz (frequency band 698~960MHz), and its third harmonic is WiFi 2.4GHz, so the size of the antenna is, for example, three times that of WiFi 2.4GHz. That is, the length and width of the recess 30 need to be increased by approximately three times, with the length of the recess 30 being 37.5 mm and the width 9 mm, and by arranging the path shown in Figure 6, the 4G / 5G frequency band can be made to resonate. Of course, if other frequency bands are to be made to resonate, the number of radiators and electronic components can be adjusted, and the figure is not limited.
[0037] In summary, the first electronic component of the electronic device of the present invention is connected to the feed end of the first radiator and the ground plane. The second electronic component is connected to the first radiator and the second radiator. The third electronic component is connected to the second radiator and the ground plane. The first electronic component, the first radiator, the second electronic component, the second radiator, and the third electronic component form a first loop, which resonates in the first frequency band. The third radiator is connected to the first radiator. The fourth electronic component is connected to the third radiator and the ground plane. The first electronic component, the first radiator, the third radiator, and the fourth electronic component form a second loop, which resonates in the second frequency band. The fourth radiator is connected to the feed end. The fifth electronic component is connected to the fourth radiator and the ground plane. The first electronic component, the feed end, the fourth radiator, and the fifth electronic component form a third loop, which resonates in the third frequency band. With the above design, the electronic device of the present invention can form a multi-loop and multi-frequency band antenna module. [Industrial applicability]
[0038] The present invention provides an electronic device having a multi-loop and multi-frequency band antenna module. [Explanation of Symbols]
[0039] 10 Electronic equipment 10a electronic equipment 20 Ground plane 30 recesses 31 First Edge 32 Second Edge 33 First end 34 Second end 35 Third edge 40 chips 100 Antenna Modules 110 First radiator 120 Second Radiator 130 Third Radiator 140 Fourth radiator 150 Fifth Radiator 160 Sixth Radiator 171 First Electronic Components 172 Second Electronic Component 173 Third Electronic Component 174 Fourth Electronic Component 175 Fifth Electronic Component 176 Sixth Electronic Component 177 Seventh Electronic Component A1~A4, B1~B2, G1~G6 position L1, L3 Length L2, L4 width
Claims
1. A contact surface having a recess, An antenna module installed in the recess, An electronic device including, The aforementioned antenna module is The first radiator, including the feed end, A first electronic component connecting the feed end and the ground surface, The second radiator and, A second electronic component connecting the first radiator and the second radiator, A third electronic component connecting the second radiator and the ground surface, wherein the first electronic component, the first radiator, the second electronic component, the second radiator, and the third electronic component form a first loop, and the third electronic component resonates in a first frequency band with the first loop. A third radiator connected to the first radiator, A fourth electronic component connecting the third radiator and the ground surface, wherein the first electronic component, the first radiator, the third radiator, and the fourth electronic component form a second loop, and the second loop resonates in a second frequency band with the fourth electronic component, A fourth radiator connected to the aforementioned feed end, A fifth electronic component connecting the fourth radiator and the ground surface, wherein the first electronic component, the feed end, the fourth radiator, and the fifth electronic component form a third loop, and the third loop resonates in a third frequency band with the fifth electronic component, Electronic devices including
2. The recess includes a first edge, a second edge, and a third edge. The first electronic component is connected to the second edge, The first edge is closer to the first electronic component than the third edge. The electronic device according to claim 1.
3. The second edge includes the first end and the second end, The first end is connected to the first edge, The second end is connected to the third edge, The distance between the first electronic component and the first end is 0.4 to 0.6 times the distance between the first electronic component and the second end. The electronic device according to claim 2.
4. The third electronic component is connected to the third edge, The fourth electronic component is connected to the first edge, The fifth electronic component is connected to the second edge, The electronic device according to claim 2.
5. The length of the first loop is 1 / 8 the wavelength of the first frequency band. The length of the second loop is 1 / 8 the wavelength of the second frequency band. The length of the third loop is 1 / 8 times the wavelength of the third frequency band. The electronic device according to claim 1.
6. The aforementioned first frequency band is between 2400 MHz and 2500 MHz. The aforementioned second frequency band is between 5000 MHz and 6500 MHz. The aforementioned third frequency band is between 6500 MHz and 8000 MHz. The electronic device according to claim 1.
7. The first electronic component includes an inductance, Each of the second electronic component, the third electronic component, the fourth electronic component, and the fifth electronic component includes capacitance. The electronic device according to claim 1.
8. A fifth radiator connected to the first radiator, The present invention further includes a sixth electronic component connected to the five radiators and the ground surface, The electronic device according to claim 1.
9. A sixth radiator connected to the first radiator, The present invention further includes a seventh electronic member connected to the six radiators and the ground surface, The electronic device according to claim 8.
10. Each of the sixth electronic component and the seventh electronic component includes capacitance. The electronic device according to claim 9.