Antenna module

Abstract

An antenna module is proposed, in which an additional slit and a through hole for grounding are formed in a single radiating portion, so that the antenna module resonates in two frequency bands or expands the bandwidth near a reference resonant frequency. The proposed antenna module includes a radiating portion having a first slit, the radiating portion being divided into a first region and a second region with respect to the first slit, wherein a plurality of first through holes and a second slit are formed in the first region, a second through hole is formed in the second region, and an energy feeding pattern is connected to a region between the first slit and the second slit in the first region.

Description

Technical Field

[0001] The present disclosure relates to an antenna module. Background Art

[0002] Generally, a dual-frequency antenna that resonates in two frequency bands is configured to include two radiating portions. In other words, the dual-frequency antenna includes an antenna that resonates with one radiating portion in a first frequency band and an antenna that resonates with another radiating portion in a second frequency band.

[0003] However, there are problems in that since the dual-band antenna requires two radiating parts, the installation space increases, and due to interference between the two radiating parts, it is difficult to expand the bandwidth greater than a certain level. Summary of the invention

[0004] The present disclosure is proposed to solve the above-mentioned conventional problems, and an object of the present disclosure is to provide an antenna module which additionally forms a slit and a through hole for grounding in a radiation portion to resonate in two frequency bands or to extend a bandwidth near a reference resonance frequency.

[0005] In order to achieve the purpose, according to an embodiment of the present disclosure, an antenna module is provided, including: a base substrate, a radiating portion arranged on the upper surface of the base substrate, a first through hole and a second through hole, the first through hole being formed by passing through the base substrate and the radiating portion, and being arranged to be adjacent to the first side of the radiating portion, the second through hole being formed by passing through the base substrate and the radiating portion, and being arranged to be adjacent to the second side of the radiating portion facing the first side, wherein the radiating portion is formed with a first slit, the first slit extending from a third side of the radiating portion into the radiating portion, the third side being adjacent to the first side and the second side.

[0006] At this time, the radiation portion may be divided into a first region and a second region, the first region being a region between a first side of the radiation portion and the first slit, and the second region being a region between a second side of the radiation portion and the first slit.

[0007] The radiation portion may be further formed with a second slit disposed between the first side of the radiation portion and the first slit, the second slit may be formed to extend into the radiation portion starting from a third side of the radiation portion, and the second slit may be spaced apart from the first slit and disposed in the first region.

[0008] Meanwhile, the antenna module may further include an energy feeding pattern disposed on the base substrate and connected to the first region of the radiation portion. The energy feeding pattern may be connected to a region between the first slit and the second slit in the first region of the radiation portion.

[0009] A plurality of first through holes may be arranged in parallel to the first side of the radiation portion in the first region and connected to a ground pattern formed on the lower surface of the base substrate, and a second through hole may be arranged in the second region of the base substrate and connected to the ground pattern formed on the lower surface of the base substrate.

[0010] The first area of ​​the radiation portion can receive signals of a first frequency band, and the second area of ​​the radiation portion can receive signals of a second frequency band.

[0011] The length of the first slit may have different lengths corresponding to a frequency interval between the reference resonant frequency and the additional resonant frequency, and the first slit may have different lengths corresponding to a bandwidth of the resonant frequency.

[0012] According to the present disclosure, the antenna module can expand the bandwidth of the reference resonant frequency or form a dual band by forming two resonant frequencies within the proposed area (ie, the radiation portion).

[0013] In addition, the antenna module may change the length of the first slit formed in the radiation portion to adjust the interval between the reference resonant frequency and the additional resonant frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of an antenna module according to an embodiment of the present disclosure;

[0015] Figure 2 is a top view of an antenna module according to an embodiment of the present disclosure;

[0016] Figure 3 is a bottom view of an antenna module according to an embodiment of the present disclosure;

[0017] Figure 4 for Figure 2 A magnified view of area B in the middle, used to show Figure 1 Energy feeding pattern in ;

[0018] Figure 5 For description Figure 1 View of the energy feed pattern in . DETAILED DESCRIPTION

[0019] Hereinafter, in order to specifically describe the embodiments, the most preferred embodiments of the present disclosure will be described with reference to the accompanying drawings, so that those skilled in the art to which the present disclosure belongs can easily implement the technical spirit of the present disclosure. First, when adding reference numerals to the components of each figure, it should be noted that even if the same components are shown in different figures, the same components have the same reference numerals as much as possible. In addition, when describing the present disclosure, when it is determined that the detailed description of the relevant known configuration or function may make the main idea of ​​the present disclosure not prominent, its detailed description will be omitted here.

[0020] Reference Figures 1 to 3 , the antenna module according to the embodiment of the present disclosure is configured to include a base substrate 100 , a radiation portion 200 , a first through hole 300 , a second through hole 400 , and a power feeding pattern 500 .

[0021] The base substrate 100 is a plate-shaped substrate having flexibility. The base substrate 100 is made of polyimide generally used in a flexible printed circuit board (FPCB). For example, the base substrate 100 is formed in a rectangular shape.

[0022] The lower surface of the base substrate 100 is configured as a ground terminal GND. In other words, for example, a ground layer made of a copper material is formed on the lower surface of the base substrate 100. At this time, the ground terminal GND is formed on the entire lower surface of the base substrate 100. Of course, the ground terminal GND may also be formed on a portion of the lower surface of the base substrate 100, and may be formed to have an area overlapping at least the plurality of first through holes 300 and the plurality of second through holes 400.

[0023] The radiation portion 200 is disposed on the upper surface of the base substrate 100. For example, the radiation portion 200 is formed in a rectangular shape having first, second, third and fourth sides S1, S2, S3 and S4, and may be formed in various shapes such as semicircular and elliptical.

[0024] The radiation portion 200 has a first slit 220 and a second slit 240 formed therein. The radiation portion 200 is divided into a first area A1 between the first side S1 and the first slit 220 and a second area A2 between the second side S2 and the first slit 220.

[0025] The first slit 220 is formed to extend into the radiating portion 200 starting from the third side S3 of the radiating portion 200 adjacent to the first and second sides S1 and S2 of the radiating portion 200. The first slit 220 has an opening in a portion contacting the third side S3 of the radiating portion 200.

[0026] The second slit 240 is formed to extend from the third side S3 of the radiating portion 200 into the radiating portion 200 and is disposed between the first side S1 of the radiating portion 200 and the first slit 220. The second slit 240 is spaced apart from the first slit 220 and disposed in the first area A1 of the radiating portion 200, and has an opening in a portion contacting the third side S3 of the radiating portion 200.

[0027] The first through hole 300 is formed by passing through the base substrate 100 and the radiation portion 200. The first through hole 300 is connected to a ground pattern formed on the lower surface of the base substrate 100. At this time, the first through hole 300 is arranged adjacent to the first side S1 of the radiation portion 200 and arranged in the first area A1 of the radiation portion 200. In the first area A1, a plurality of first through holes 300 are configured and arranged in parallel with the first side S1 of the radiation portion 200.

[0028] The second through hole 400 is formed by passing through the base substrate 100 and the radiation portion 200. The second through hole 400 is connected to a ground pattern formed on the lower surface of the base substrate 100. At this time, the second through hole 400 is arranged adjacent to a second side S2 of the radiation portion 200 opposite to the first side S1 of the radiation portion 200, and is arranged in a second area A2 of the radiation portion 200.

[0029] The energy feeding pattern 500 is arranged on the base substrate 100 and connected to the radiation portion 200. The energy feeding pattern 500 is a pattern for connecting the radiation portion 200 to an energy feeding source (not shown), and is electrically connected to the radiation portion 200. The energy feeding pattern 500 is connected to the first area A1 of the radiation portion 200. At this time, referring to Figure 4 , the energy feeding pattern 500 is connected to a region between the first slit 220 and the second slit 240 in the first area A1 of the radiation portion 200 .

[0030] At the same time, refer to Figure 5 , the energy feeding pattern 500 may be configured to include a first energy feeding pattern 520 electrically connected to an energy feeding source, and a second energy feeding pattern 540 electrically connected to the first energy feeding pattern 520 and the radiation portion 200 .

[0031] At this time, it can be imagined that the antenna module is composed of a stacked antenna in which the first base substrate 120, the second base substrate 140 and the third base substrate 160 are stacked, and the first energy feeding pattern 520 is arranged on the upper surface of the first base substrate 120 and electrically connected to the energy feeding source.

[0032] The second energy feeding pattern 540 is arranged on the upper surface of the first base substrate 120. One end of the second energy feeding pattern 540 is electrically connected to the first energy feeding pattern 520 through a through hole (not shown). The other end of the second energy feeding pattern 540 is electrically connected to the radiation portion 200 through a through hole (not shown). At this time, the other end of the second energy feeding pattern 540 is electrically connected to the region between the first slit 220 and the second slit 240 in the first area A1 of the radiation portion 200.

[0033] According to the above structure, the radiation portion 200 may be electrically connected to the energy feeding pattern 500 and the plurality of first through holes 300 to configure the antenna as a planar inverted F antenna (PIFA) that resonates within a reference frequency band.

[0034] Furthermore, the radiation portion 200 may be connected to the energy feeding pattern 500 and the second via 400 to configure the antenna as a PIFA antenna that resonates within an additional frequency band.

[0035] As described above, the antenna module according to an embodiment of the present disclosure adds a second through hole 400 connected to the first slot 220 and the ground terminal to a radiation portion (the radiation portion is connected to the ground terminal through multiple first through holes 300 to have a reference resonant frequency), thereby causing a change in the current path to have an additional resonant frequency.

[0036] Therefore, the antenna module according to the embodiment of the present disclosure may operate as a dual-frequency antenna having a reference resonant frequency and an additional resonant frequency, or increase a bandwidth of a reference resonant frequency through the reference resonant frequency and the additional resonant frequency.

[0037] At the same time, refer to Figure 5 The antenna module according to the embodiment of the present disclosure can be formed to change the length of the first slit 220 according to the required interval between the reference resonant frequency and the additional resonant frequency. At this time, adjusting the interval between the reference resonant frequency and the additional resonant frequency can also be understood as adjusting the bandwidth of the reference resonant frequency.

[0038] In addition, the antenna module according to an embodiment of the present disclosure may match the impedance between the reference resonant frequency and the additional resonant frequency by adjusting the length of the second slit 240 .

[0039] As described above, the antenna module according to the embodiment of the present disclosure may expand the bandwidth of the reference resonant frequency or form a dual band by forming two resonant frequencies within a suggested area (ie, the radiation portion 200 ).

[0040] 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 modified examples and changed examples without departing from the scope of the claims of the present disclosure.

Claims

1. An antenna module, comprising: base substrate; a radiation portion disposed on an upper surface of the base substrate; a plurality of first through holes formed by passing through the base substrate and the radiating portion and arranged adjacent to a first side of the radiating portion; and a second through hole formed by passing through the base substrate and the radiating portion and arranged adjacent to a second side of the radiating portion facing the first side, The radiation portion is formed with a first slit and a second slit, the first slit is formed to extend from a third side of the radiation portion adjacent to the first side and the second side to the radiation portion, and the second slit is formed to extend from the third side of the radiation portion to the radiation portion, so that the second slit is arranged between the first side of the radiation portion and the first slit. The radiation portion is divided into a first area and a second area, the first area is located between a first side of the radiation portion and the first slit, and the second area is located between a second side of the radiation portion and the first slit, The plurality of first through holes are arranged in the first region in parallel with a first side of the radiating portion.

2. The antenna module according to claim 1, in, The second slit is spaced apart from the first slit and is arranged in the first region.

3. The antenna module according to claim 2, Also included is an energy feeding pattern disposed on the base substrate and connected to the first region of the radiation portion.

4. The antenna module according to claim 3, in, The energy feeding pattern is connected to a region between the first slit and the second slit in the first region of the radiation portion.

5. The antenna module according to claim 1, in, The plurality of first vias are connected to a ground pattern formed on a lower surface of the base substrate.

6. The antenna module according to claim 1, in, The second through hole is arranged in the second region of the base substrate and is connected to a ground pattern formed on a lower surface of the base substrate.

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