antenna module
By forming through-holes in the adjacent radiating patterns in the antenna module and connecting them to the ground, the problem of interference between radiating patterns in small electronic devices is solved, and the isolation characteristics are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AMOTECH CO LTD
- Filing Date
- 2020-10-19
- Publication Date
- 2026-07-21
AI Technical Summary
In small electronic devices, it is difficult to maintain sufficient spacing between the radiation patterns of antennas due to the reduced size, leading to interference and reduced isolation characteristics.
By forming through holes on two adjacent radiating patterns and connecting them to the grounding part, a grounding wall is formed to reduce interference between the radiating patterns.
This maximizes the isolation between radiation patterns and reduces interference.
Smart Images
Figure CN114651375B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to an antenna module. Background Technology
[0002] Typically, an antenna resonating in two frequency bands is configured to include two radiation patterns. In this case, the two radiation patterns are arranged with a certain or greater distance between them to prevent mutual interference.
[0003] However, when electronic devices equipped with antennas are small, it becomes difficult to maintain the spacing between radiation patterns due to the reduced antenna size. Therefore, a problem with conventional antennas is that interference occurs between antenna patterns, thereby reducing isolation characteristics. Summary of the Invention
[0004] Technical issues
[0005] This disclosure has been made to address the aforementioned conventional problems, and the purpose of this disclosure is to provide an antenna module that forms a grounding wall through vias on two radiating patterns arranged adjacent to each other, thereby maximizing the isolation characteristics between the radiating patterns.
[0006] Technical solution
[0007] To achieve this objective, an antenna module according to an embodiment of the present disclosure includes: a base substrate on which a grounding portion is formed; a first radiating pattern disposed on an upper surface of the base substrate; a second radiating pattern disposed on the upper surface of the base substrate and spaced apart from the first radiating pattern; a plurality of first through-holes penetrating the base substrate and the first radiating pattern and arranged parallel to a side of the first radiating pattern facing the second radiating pattern; and a plurality of second through-holes penetrating the base substrate and the second radiating pattern and arranged parallel to a side of the second radiating pattern facing the first radiating pattern. In this case, the area of the first radiating pattern is smaller than the area of the second radiating pattern.
[0008] Multiple first through holes electrically connect the first radiating pattern to the grounding part, and multiple second through holes electrically connect the second radiating pattern to the grounding part.
[0009] The antenna module according to embodiments of the present disclosure may further include a feed pattern disposed on the upper surface of the base substrate and electrically connected to a first radiating pattern and a second radiating pattern.
[0010] The feed pattern may include a first feed pattern electrically connected to a first radiation pattern, a second feed pattern electrically connected to a second radiation pattern, and a third feed pattern electrically connected to the first feed pattern and the second feed pattern.
[0011] At this time, the base substrate may include: a first base substrate, on the upper surface of which a first radiation pattern and a second radiation pattern are formed; a second base substrate disposed on the lower surface of the first base substrate, and the feed pattern may further include: a first connection pattern disposed on the second base substrate to electrically connect the first radiation pattern and the first feed pattern; a second connection pattern disposed on the second base substrate to electrically connect the second radiation pattern and the second feed pattern; and a third connection pattern disposed on the second base substrate to electrically connect the first feed pattern and the second feed pattern. Here, the base substrate may further include a third base substrate disposed on the lower surface of the second base substrate and having a ground portion disposed on the lower surface.
[0012] Meanwhile, the feeding pattern may also include a base portion, a first branch portion and a second branch portion, wherein the first branch portion branches from the base portion and is electrically connected to the first radiating pattern, and the second branch portion branches from the base portion and is electrically connected to the second radiating pattern.
[0013] Advantages of the invention
[0014] According to this disclosure, the antenna module can form a grounding wall through vias on two radiating patterns arranged adjacent to each other, thereby minimizing interference between the radiating patterns and maximizing isolation characteristics. Attached Figure Description
[0015] Figures 1 to 3 This is a schematic diagram used to describe an antenna module according to an embodiment of the present disclosure.
[0016] Figures 4 to 6 This is a schematic diagram illustrating various modified examples of the first and second radiation patterns of an antenna module according to embodiments of the present disclosure.
[0017] Figures 7 to 9 This is a schematic diagram illustrating the feed pattern of an antenna module according to an embodiment of the present disclosure. Detailed Implementation
[0018] In the following description, for the purpose of detailed description of embodiments, the most preferred embodiments of this disclosure will be described with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily practice the technical spirit of this disclosure. First, when adding reference numerals to components in each drawing, it should be noted that identical components should, as far as possible, have the same reference numerals, even if the same components are shown in different drawings. Furthermore, in describing this disclosure, detailed descriptions of related known configurations or functions will be omitted when it is determined that such detailed descriptions might obscure the essential points of this disclosure.
[0019] Reference Figures 1 to 3According to a first embodiment of the present disclosure, the antenna module is configured to include a base substrate (100), a first radiation pattern (200), a second radiation pattern (300), a plurality of first through holes (400), a plurality of second through holes (500), and a feed pattern (600).
[0020] The base substrate (100) is a flexible, plate-shaped substrate. The base substrate (100) is made of, for example, polyimide, which is commonly used in flexible printed circuit boards (FPCBs). As an example, the base substrate (100) is formed in a rectangular shape and has a first side surface (SS1), a second side surface (SS2), a third side surface (SS3), and a fourth side surface (SS4).
[0021] The lower surface of the base substrate (100) is configured as a grounding portion (GND). In other words, a grounding layer made of, for example, copper material is formed on the lower surface of the base substrate (100). In this case, the grounding portion (GND) is formed on the entire lower surface of the base substrate (100). Of course, the grounding portion (GND) may also be formed on a portion of the lower surface of the base substrate (100) and is formed to have a region that overlaps at least with a plurality of first vias (400) and a plurality of second vias (500).
[0022] The first radiation pattern (200) is formed in a rectangular shape and disposed on the upper surface of the base substrate (100). The first radiation pattern (200) is disposed adjacent to the third side surface (SS3) on the upper surface of the base substrate (100). The area of the first radiation pattern (200) is formed to be smaller than the area of the second radiation pattern (300). Therefore, the first radiation pattern (200) resonates with a signal having a higher frequency band than the second radiation pattern (300).
[0023] The second radiation pattern (300) is formed in a rectangular shape and disposed on the upper surface of the base substrate (100). The second radiation pattern (300) is disposed adjacent to the fourth side surface (SS4) on the upper surface of the base substrate (100). The area of the second radiation pattern (300) is formed to be smaller than the area of the first radiation pattern (200). Therefore, the second radiation pattern (300) resonates with a signal having a higher frequency band than the first radiation pattern (200).
[0024] As an example, the first radiation pattern (200) and the second radiation pattern (300) resonate with signals having a 6Hz frequency band and an 8Hz frequency band, respectively. Of course, as the size of the antenna module increases, the first radiation pattern (200) and the second radiation pattern (300) can also resonate with signals of different frequencies in lower frequency bands.
[0025] At the same time, refer to Figure 4 and Figure 5 The first radiating pattern (200) and the second radiating pattern (300) can be formed in various shapes, such as semicircles and ellipses. The first radiating pattern (200) and the second radiating pattern (300) can have the same shape, but can be formed with different areas.
[0026] Reference Figure 6 The first radiating pattern (200) and the second radiating pattern (300) can also be formed in different shapes. In other words, the first radiating pattern (200) can be formed in a rectangular shape, while the second radiating pattern (300) can be formed in a polygonal shape other than a rectangular shape, such as a semicircle or a circle.
[0027] As described above, since the first radiation pattern (200) and the second radiation pattern (300) are formed in the shape of a wide circle or a polygon, the directionality of the radiation pattern can be maximized.
[0028] Multiple first vias (400) are formed by penetrating the first radiating pattern (200) and the base substrate (100). The multiple first vias (400) are electrically connected to the first radiating pattern (200) and the grounding portion (GND) formed on the lower surface of the base substrate (100).
[0029] Multiple first through holes (400) are formed on the first radiating pattern (200), but are arranged side by side along one side of the first radiating pattern (200). Multiple first through holes (400) are arranged on one side of the first radiating pattern (200) facing the second radiating pattern (300).
[0030] As an example, the first radiation pattern (200) is formed into a rectangular shape having a first side (S1), a second side (S2), a third side (S3) and a fourth side (S4), and when the first side (S1) is the side facing the second radiation pattern (300), a plurality of first through holes (400) are arranged parallel to the first side (S1).
[0031] Multiple second vias (500) are formed by penetrating the second radiating pattern (300) and the base substrate (100). The multiple second vias (500) are electrically connected to the second radiating pattern (300) and the grounding portion (GND) formed on the lower surface of the base substrate (100).
[0032] Multiple second through holes (500) are formed on the second radiating pattern (300), but are arranged side by side along one side of the second radiating pattern (300). The multiple second through holes (500) are arranged on one side of the second radiating pattern (300) facing the first radiating pattern (200).
[0033] As an example, the second radiation pattern (300) is formed into a rectangular shape having a first side (S1'), a second side (S2'), a third side (S3') and a fourth side (S4'), and when the first side (S1') is the side facing the first radiation pattern (200), a plurality of second through holes (500) are arranged parallel to the first side (S1').
[0034] At the same time, such as Figure 5 As shown, when the first radiating pattern (200) and the second radiating pattern (300) face each other with a circular (arc) shape, it is also possible to form through holes (i.e., the first through hole (400) and the second through hole (500)) only in the part that does not meet the separation distance between the radiating patterns.
[0035] Since the spacing between the first radiation pattern (200) and the second radiation pattern (300) is approximately 1 mm and very narrow, the interference between the two radiation patterns increases, thereby reducing the isolation characteristics.
[0036] According to the antenna module of the embodiments of the present disclosure, since a first through hole (400) and a second through hole (500) are formed on the first radiating pattern (200) and the second radiating pattern (300) respectively, and the first through hole and the second through hole are adjacent to the sides of the first radiating pattern (200) and the second radiating pattern (300) facing each other and arranged closely, a plurality of first through holes (400) and a plurality of second through holes (500) can form a grounding wall (GW; GND wall) between the first radiating pattern (200) and the second radiating pattern (300), thereby maximizing the isolation characteristics between the radiating patterns.
[0037] The feed pattern (600) is used to connect the first radiation pattern (200) and the second radiation pattern (300) to a feed power source (not shown), and the feed pattern is electrically connected to the first radiation pattern (200) and the second radiation pattern (300). When the feed pattern (600) is electrically connected to the first radiation pattern (200) and the second radiation pattern (300) resonating in different frequency bands, a dual-band antenna can be configured having a planar inverted F antenna (PIFA) resonating in both frequency bands.
[0038] The feed pattern (600) may include a first feed pattern (612) electrically connected to the first radiation pattern (200), a second feed pattern (614) electrically connected to the second radiation pattern (300), and a third feed pattern (616) electrically connected to the first feed pattern (612) and the second feed pattern (614).
[0039] At this time, refer to Figure 7Assuming the antenna module is configured as a stacked antenna, in which a first base substrate (120), a second base substrate (140), and a third base substrate (160) are stacked.
[0040] The first feed pattern (612) is electrically connected to the first radiation pattern (200) through a first connection pattern (622) disposed on the upper surface of the second base substrate (140). At this time, the first connection pattern (622) is electrically connected to the first radiation pattern (200) and the first feed pattern (612) through a through hole (not shown) formed through the first base substrate (120).
[0041] The second feed pattern (614) is electrically connected to the second radiation pattern (300) through a second connection pattern (624) disposed on the upper surface of the second base substrate (140). At this time, the second connection pattern (624) is electrically connected to the second radiation pattern (300) and the second feed pattern (614) through a through hole (not shown) formed through the first base substrate (120).
[0042] The third feed pattern (616) is electrically connected to the first feed pattern (612) and the second feed pattern (614) through a third connection pattern (626) disposed on the upper surface of the second base substrate (140). At this time, the third feed pattern (616) is electrically connected to the first feed pattern (612) and the second feed pattern (614) through a through-hole (not shown) formed through the first base substrate (120).
[0043] Reference Figure 8 and Figure 9 When the antenna module consists of only one base substrate (100), the feed pattern (600) consists of a base portion (632), a first branch portion (634), and a second branch portion (636). The base portion is connected to a power supply (not shown), the first branch portion branches from the base portion (632) and is electrically connected to the first radiating pattern (200), and the second branch portion branches from the base portion (632) and is electrically connected to the second radiating pattern (300). In this case, the base portion (632), the first branch portion (634), and the second branch portion (636) can be integrally formed.
[0044] Although preferred embodiments of the present disclosure have been described above, it should be understood that the present disclosure can be modified in various forms, and those skilled in the art can practice various examples of modifications and alterations without departing from the scope of the claims of the present disclosure.
Claims
1. An antenna module, the antenna module comprising: A base substrate, wherein a grounding portion is formed on the lower surface of the base substrate; A first radiating pattern is disposed on the upper surface of the base substrate; A second radiation pattern is disposed on the upper surface of the base substrate and spaced apart from the first radiation pattern. A plurality of first through-holes penetrate the base substrate and the first radiating pattern, and are arranged parallel to one side of the first radiating pattern facing the second radiating pattern; a plurality of second through-holes penetrate the base substrate and the second radiating pattern, and are arranged parallel to one side of the second radiating pattern facing the first radiating pattern. Wherein, the plurality of first through holes and the plurality of second through holes form a grounding wall between the first radiation pattern and the second radiation pattern; and A feed pattern is disposed on the upper surface of the base substrate and electrically connected to the first radiation pattern and the second radiation pattern. The feeding pattern includes: Base portion; A first branch portion, which branches off from the base portion and is electrically connected to the first radiating pattern; and The second branch portion branches off from the base portion and is electrically connected to the second radiating pattern.
2. The antenna module according to claim 1, in, The area of the first radiating pattern is smaller than the area of the second radiating pattern.
3. The antenna module according to claim 1, in, The plurality of first through holes electrically connect the first radiation pattern to the grounding portion.
4. The antenna module according to claim 1, in, The plurality of second through holes electrically connect the second radiation pattern to the grounding portion.
5. The antenna module according to claim 1, in, The power supply pattern includes: A first feed pattern, wherein the first feed pattern is electrically connected to the first radiation pattern; A second feed pattern, electrically connected to the second radiation pattern; and A third feed pattern is electrically connected to the first feed pattern and the second feed pattern.
6. The antenna module according to claim 5, in, The base substrate includes: A first base substrate, wherein the first radiation pattern and the second radiation pattern are formed on the upper surface of the first base substrate; and A second base substrate is disposed on the lower surface of the first base substrate.
7. The antenna module according to claim 6, in, The power supply pattern further includes: A first connection pattern is disposed on the second base substrate to electrically connect the first radiation pattern and the first feed pattern. A second connection pattern is disposed on the second base substrate to electrically connect the second radiation pattern and the second feed pattern; and A third connection pattern is arranged on the second base substrate to electrically connect the first feed pattern and the second feed pattern.
8. The antenna module according to claim 6, in, The base substrate further includes: A third base substrate is disposed on the lower surface of the second base substrate and has a grounding portion disposed on the lower surface.