阅读说明：本技术 天线装置和包括其的显示装置 (Antenna device and display device including the same ) 是由 许润镐 金钟敏 柳汉燮 洪源斌 于 2020-04-02 设计创作，主要内容包括：一种根据本发明的实施方案的天线元件,包括：介电层；天线图案,其设置在所述介电层的顶部表面上并且包括辐射电极和连接至所述辐射电极的传输线；虚设电极,其与所述介电层的所述顶部表面上的所述天线图案分离并且至少部分地包围所述天线图案；以及阻挡图案,其在所述天线图案的附近布置在所述虚设电极内。通过所述阻挡图案可防止所述虚设电极的辐射干扰,从而改善辐射可靠性。(An antenna element according to an embodiment of the present invention, comprising: a dielectric layer; an antenna pattern disposed on a top surface of the dielectric layer and including a radiation electrode and a transmission line connected to the radiation electrode; a dummy electrode separated from and at least partially surrounding the antenna pattern on the top surface of the dielectric layer; and a blocking pattern disposed within the dummy electrode in the vicinity of the antenna pattern. Radiation interference of the dummy electrode can be prevented by the blocking pattern, thereby improving radiation reliability.)

1. An antenna device, comprising:

a dielectric layer;

an antenna pattern disposed on a top surface of the dielectric layer, the antenna pattern including a radiating electrode and a transmission line connected to the radiating electrode;

a dummy electrode separated from the antenna pattern on the top surface of the dielectric layer, the dummy electrode at least partially surrounding the antenna pattern; and

a blocking pattern disposed in the dummy electrode around the antenna pattern.

2. The antenna device of claim 1, wherein each of the antenna pattern and the dummy electrode comprises a mesh structure.

3. The antenna device according to claim 2, wherein the blocking pattern comprises the same mesh structure as the mesh structure comprised in the dummy electrode.

4. The antenna device according to claim 1, wherein the blocking pattern has an island shape separated in the dummy electrode.

5. The antenna device according to claim 4, wherein a plurality of the blocking patterns are arranged along a periphery of the antenna pattern.

6. The antenna device according to claim 1, wherein a plurality of the radiation electrodes are arranged on the top surface of the dielectric layer.

7. The antenna device according to claim 6, further comprising a pad electrode provided independently for each of the radiation electrodes.

8. The antenna device according to claim 6, wherein the radiation electrode includes a first radiation electrode and a second radiation electrode adjacent to each other, and

the first and second radiation electrodes are coupled by the transmission line to form a radiation electrode group.

9. The antenna device according to claim 8, wherein the barrier pattern is provided between the first radiation electrode and the second radiation electrode.

10. The antenna device of claim 8, wherein a plurality of the radiating electrode groups are disposed on the top surface of the dielectric layer.

11. The antenna device according to claim 10, further comprising a pad electrode provided independently for each of the radiation electrode groups.

12. The antenna device of claim 1, further comprising a ground layer disposed on a bottom surface of the dielectric layer.

13. The antenna device according to claim 1, wherein a ratio of an area of the blocking pattern to an area of the radiation electrode is 0.4 to 0.85.

14. The antenna device according to claim 1, wherein a separation distance between the radiation electrode and the dummy electrode is 2 μm to 10 μm.

15. The antenna device of claim 1, wherein the antenna pattern, the dummy electrode, and the blocking pattern comprise at least one selected from the group consisting of: silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), molybdenum (Mo), calcium (Ca), and alloys thereof.

16. A display device comprising the antenna device according to claim 1.

Technical Field

The invention relates to an antenna device and a display device including the same. More particularly, the present invention relates to an antenna device including an electrode pattern and a display device including the same.

Background

With the development of information technology, wireless communication technologies such as Wi-Fi, bluetooth, etc. are combined with display devices (e.g., in the form of smart phones). In this case, the antenna may be combined with the display device to provide a communication function.

With the rapid development of mobile communication technology, antennas capable of high-frequency or ultra-high-frequency communication are required in display devices. In addition, with the recent development of thin display devices having high transparency and high resolution, such as transparent displays and flexible displays, antennas have been developed in the form of, for example, films or patches including thin film electrodes.

The antenna includes a radiation electrode, and the radiation electrode may be formed in, for example, a mesh shape to improve transparency of the antenna. In this case, the radiation electrodes include electrode lines that cross each other, and the electrode lines are visually recognized by a user of the image display device.

When electrodes similar to a mesh pattern are arranged around the radiation electrode to prevent the electrode line from being visually recognized, power and radiation through the radiation electrode may be disturbed or reduced.

For example, korean laid-open patent application No. 2013-0095451 discloses an antenna integrated into a display panel, but does not consider visual recognition and radiation efficiency of an electrode included in the antenna.

Disclosure of Invention

Technical object

According to an aspect of the present invention, there is provided an antenna device having improved visual characteristics and radiation reliability.

According to an aspect of the present invention, there is provided a display device including an antenna device having improved visual characteristics and radiation reliability.

Means for solving the problems

(1) An antenna device, comprising: a dielectric layer; an antenna pattern disposed on a top surface of the dielectric layer, the antenna pattern including a radiation electrode and a transmission line connected to the radiation electrode; a dummy electrode separated from the antenna pattern on the top surface of the dielectric layer, the dummy electrode at least partially surrounding the antenna pattern; and a blocking pattern disposed in the dummy electrode around the antenna pattern.

(2) The antenna device as described in (1) above, wherein each of the antenna pattern and the dummy electrode includes a mesh structure.

(3) The antenna device as described in (2) above, wherein the blocking pattern includes the same mesh structure as the mesh structure included in the dummy electrode.

(4) The antenna device as described in the above (1), wherein the blocking pattern has an island shape separated in the dummy electrode.

(5) The antenna device according to the above (4), wherein the plurality of barrier patterns are arranged along a periphery of the antenna pattern.

(6) The antenna device as described in (1) above, wherein the plurality of radiation electrodes are arranged on the top surface of the dielectric layer.

(7) The antenna device as described in (6) above, further comprising a pad electrode provided independently for each of the radiation electrodes.

(8) The antenna device according to the above (6), wherein the radiation electrode includes a first radiation electrode and a second radiation electrode adjacent to each other, and the first radiation electrode and the second radiation electrode are coupled by a transmission line to form a radiation electrode group.

(9) The antenna device according to the above (8), wherein the barrier pattern is provided between the first radiation electrode and the second radiation electrode.

(10) The antenna device according to the above (8), wherein a plurality of radiation electrode groups are arranged on a top surface of the dielectric layer.

(11) The antenna device as described in (10) above, further comprising a pad electrode provided independently for each of the radiation electrode groups.

(12) The antenna device according to the above (1), further comprising a ground layer provided on a bottom surface of the dielectric layer.

(13) The antenna device as described in the above (1), wherein a ratio of an area of the barrier pattern to an area of the radiation electrode is 0.4 to 0.85.

(14) The antenna device as described in the above (1), wherein the spacing distance between the radiation electrode and the dummy electrode is 2 μm to 10 μm.

(15) The antenna device as described in (1) above, wherein the antenna pattern, the dummy electrode, and the blocking pattern include at least one selected from the group consisting of: silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), molybdenum (Mo), calcium (Ca), and alloys thereof.

(16) A display device comprising an antenna device according to embodiments as described above.

Effects of the invention

The antenna device according to an embodiment of the present invention may include a radiation electrode including a mesh structure and a dummy electrode including a mesh structure surrounding the radiation electrode. The radiation electrode and the dummy electrode may be formed in similar patterns to improve uniformity of electrode patterns, thereby preventing the electrodes from being recognized by a user.

In an exemplary embodiment, an island-shaped barrier pattern may be included in the dummy electrode. Radiation absorption and fringe field generation in the dummy electrode may be blocked by the blocking pattern. Thus, enhanced optical characteristics can be achieved while maintaining the gain and directivity of the antenna device.

Drawings

Fig. 1 and 2 are a schematic cross-sectional view and a top plan view, respectively, illustrating an antenna device according to an exemplary embodiment.

Fig. 3 is a schematic top plan view for explaining radiation characteristics in the antenna device according to the comparative example.

Fig. 4 is a schematic top plan view illustrating an antenna apparatus according to some example embodiments.

Fig. 5 is a schematic top plan view illustrating an antenna apparatus according to some example embodiments.

Fig. 6 is a schematic top plan view illustrating a display device according to an exemplary embodiment.

Detailed Description

According to an exemplary embodiment of the present invention, an antenna device including a radiation electrode and a dummy electrode having improved radiation reliability by using a blocking pattern formed in the dummy electrode is provided.

The antenna device may be a microstrip patch antenna, for example manufactured in the form of a transparent film. The antenna device is applicable to a communication device for mobile communication of a high frequency band or an ultra high frequency band (e.g., 3G, 4G, 5G, or higher).

According to an exemplary embodiment of the present invention, there is also provided a display device including the antenna device. The application of the antenna device is not limited to the display device, and the antenna device may be applied to various objects or structures such as vehicles, home appliances, buildings, and the like.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, those skilled in the art will appreciate that such embodiments described with reference to the accompanying drawings are provided for further understanding of the spirit of the invention and do not limit the claimed subject matter as disclosed in the detailed description and the appended claims.

Fig. 1 and 2 are a schematic cross-sectional view and a top plan view, respectively, illustrating an antenna device according to an exemplary embodiment.

Referring to fig. 1 and 2, an antenna device according to an exemplary embodiment may include a dielectric layer 100, a first electrode layer 110 disposed on a top surface of the dielectric layer 100, and a second electrode layer 90 disposed on a bottom surface of the dielectric layer 100.

The dielectric layer 100 may include an insulating material having a predetermined dielectric constant. The dielectric layer 100 may include, for example, an inorganic insulating material such as glass, silicon oxide, silicon nitride, or metal oxide, or an organic insulating material such as epoxy resin, acrylic resin, or imide-based resin. The dielectric layer 100 may be used as a film substrate of an antenna device on which the first electrode layer 110 is formed.

For example, a transparent film may be used as the dielectric layer 90. For example, the transparent film may include polyester-based resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, and polybutylene terephthalate; cellulose-based resins such as diacetylcellulose and triacetylcellulose; a polycarbonate-based resin; acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; styrene-based resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin-based resins such as polyethylene, polypropylene, cyclic olefin or polyolefin having a norbornene structure and ethylene-propylene copolymer; a vinyl chloride-based resin; amide-based resins such as nylon and aramid; an imide-based resin; a polyether sulfone-based resin; a sulfone-based resin; polyether ether ketone-based resin; polyphenylene sulfide resin; a vinyl alcohol-based resin; vinylidene chloride-based resins; a vinyl butyral based resin; an acrylate-based resin; a polyoxymethylene-based resin; an epoxy-based resin; urethane or acrylic urethane based resins; silicone, and the like. These may be used alone or in combination of two or more thereof.

In some embodiments, an adhesive film, such as transparent optical adhesive (OCA), Optically Clear Resin (OCR), etc., may be included in the dielectric layer 100.

In some embodiments, the dielectric constant of the dielectric layer 100 may be adjusted in the range of about 1.5 to about 12. When the dielectric constant exceeds about 12, the driving frequency may be excessively lowered, and driving in a desired high frequency band may not be achieved.

As shown in fig. 2, the first electrode layer 110 may include an antenna pattern including a radiation electrode 112 and a transmission line 114.

In some embodiments, the first electrode layer 110 may further include a dummy electrode 130 disposed around the antenna pattern.

In some example embodiments, the first electrode layer 110 may include silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), molybdenum (Mo), calcium (Ca), or an alloy thereof. These may be used alone or in combination.

In an embodiment, the first electrode layer 110 may include silver (Ag) or a silver alloy to achieve low impedance, and may include, for example, a silver palladium copper (APC) alloy.

In an embodiment, the first electrode layer 110 may include copper (Cu) or a copper alloy to achieve a low resistance and a fine line width pattern. For example, the first electrode layer 110 may include a copper-calcium (Cu — Ca) alloy.

In some embodiments, the first electrode layer 110 may include a transparent conductive oxide such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Indium Tin Zinc Oxide (ITZO), zinc oxide (ZnOx), or the like.

For example, the first electrode layer 110 may have a multi-layered structure including at least one metal layer or alloy layer and a transparent metal oxide layer.

In an exemplary embodiment, the antenna pattern or the radiation electrode 112 may include a mesh structure (a first mesh structure). Therefore, the transmittance of the radiation electrode 112 can be increased, and the flexibility of the antenna device can be improved. Therefore, the antenna device can be effectively applied to a flexible display device.

The dummy electrode 130 may further include a mesh structure (a second mesh structure). In some embodiments, the first lattice structure and the second lattice structure may have the same structure. For example, line widths and pitches (pitches) of the electrode lines included in the first and second mesh structures may be substantially the same.

In an embodiment, the first and second lattice structures may be different from each other.

The transmission line 114 may extend from one end portion of the radiation electrode 112. For example, the transmission line 114 may protrude from and extend out of a central portion of the radiation electrode 112.

In an embodiment, the transmission line 114 may include substantially the same conductive material as the radiation electrode 112, and may be formed through substantially the same etching process. In this case, the transmission line 114 may be integrally connected to the radiation electrode 112 to be provided as a substantially single member.

In some embodiments, the transmission line 114 and the radiation electrode 112 may include substantially the same mesh structure (first mesh structure). The dummy electrode 130 including the second mesh structure may be spaced apart from the radiation electrode 112 and the transmission line 114 by a predetermined distance, and may be formed along the circumference of the radiation electrode 112 and the transmission line 114.

In an embodiment, a conductive layer including the above-described metals, alloys, and/or transparent conductive oxides may be formed on the dielectric layer 100, and then the conductive layer may be etched to form a mesh layer. In forming the mesh layer, the conductive layer may be etched along the contours of the radiation electrode 112 and the transmission line 114 to form the first separation region 120 a. The antenna pattern including the radiation electrode 112 and the transmission line 114 and the dummy electrode 130 may be separated from the mesh layer by the first separation area 120 a.

In some embodiments, a separation distance (e.g., a width of the first separation region 120 a) between the antenna pattern and the dummy electrode 130 may be about 2 μm to 10 μm. In the above range, signal interference caused by the dummy electrode 130 may be reduced while preventing the electrode from being visually recognized.

In an embodiment, the electrode lines included in the antenna pattern and the dummy electrode 130 forming the mesh structure may have a line width of about 2 to 10 μm and aboutToIs measured. Within the above rangeThe transmittance of the antenna device can be improved while the impedance of the antenna pattern is reduced.

In an exemplary embodiment, the dummy electrode 130 may include a blocking pattern 135. The barrier patterns 135 may share the second mesh structure included in the dummy electrode 130.

The barrier pattern 135 may have an island shape isolated in the dummy electrode 130. For example, the second separation area 120b may be formed by etching a portion of the mesh layer included in the dummy electrode 130 along the outline of the barrier pattern 135. The island-shaped barrier pattern 135 may be defined by the second separation region 120 b.

In an exemplary embodiment, a plurality of barrier patterns 135 may be arranged along the circumference of the radiation electrode 112. In some embodiments, as shown in fig. 2, the barrier pattern 135 may also be disposed around the transmission line 114.

The blocking pattern 135 may block induced current and self-radiation generated in the dummy electrode 130 caused by a fringe field directed from the radiation electrode 112 to the dummy electrode 130. For example, the blocking pattern 135 may function as a band pass filter or an LC element to block radiation absorption and induced current in the dummy electrode 130.

Therefore, the radiation concentration at the radiation electrode 112 can be increased, and the gain and directivity of the antenna device can also be improved.

In some embodiments, a ratio of an area of each of the barrier patterns 135 with respect to an area of the radiation electrode 112 may be in a range of about 0.4 to 0.85. Within the above range, high frequency or ultra high frequency communication characteristics corresponding to, for example, 3G, 4G, 5G, or higher frequency bands may be substantially achieved while providing filtering by the blocking pattern 135.

The pad electrode 116 may be provided at one end portion of the antenna device. In some embodiments, the pad electrode 116 may include a signal pad 116a and a ground pad 116 b. The signal pad 116a may be electrically connected to the radiation electrode 112 through the transmission line 114, and may electrically connect a driving circuit unit (e.g., an IC chip) to the radiation electrode 112.

For example, a circuit board such as a flexible circuit board (FPCB) may be bonded to the signal pad 116a, and the driving circuit unit may be disposed on the flexible circuit board. Accordingly, signal transmission/reception may be achieved between the antenna pattern and the driving circuit unit. In an embodiment, the driving circuit unit may be directly mounted on a surface of the flexible circuit board.

In some embodiments, a pair of ground pads 116b may be disposed facing each other while being electrically and physically spaced apart from signal pads 116a with signal pads 116a interposed between ground pads 116 b. Thus, by means of the antenna arrangement, horizontal radiation can be realized together with vertical radiation.

The pad electrode 116 may have a solid structure including the above-described metal or alloy to reduce signal impedance. The pad electrode 116 may be located at the same layer as that of the antenna pattern (e.g., on the top surface of the dielectric layer 100).

Alternatively, the pad electrode 116 may be located at a layer different from that of the antenna pattern. For example, an insulating layer covering the antenna pattern may be formed, and the pad electrode 116 may be formed on the insulating layer. In this case, the signal pad 116a may be electrically connected to the transmission line 114 through a contact penetrating the insulating layer.

The second electrode layer 90 may function as a ground electrode or a ground layer of the antenna pattern. For example, capacitance and inductance may be formed between the radiation electrode 112 and the second electrode layer 90 through the dielectric layer 100 in the thickness direction of the antenna device, so that a frequency band at the drivable antenna pattern may be adjusted. For example, the antenna device may be arranged as a vertical radiating antenna via the second electrode layer 90.

The second electrode layer 90 may include a metal substantially the same as or similar to the metal of the first electrode layer 110. In an embodiment, a conductive member of a display device in which an antenna device is mounted may be used as the second electrode layer 90.

The conductive member may include: included in the display panel are, for example, various wirings such as a gate electrode of a Thin Film Transistor (TFT), a scanning line, or a data line, or various electrodes such as a pixel electrode and a common electrode.

As described above, the transmittance of the antenna device may be improved by forming the antenna pattern including the first mesh structure. In addition, the dummy electrode 130 including the second mesh structure and the blocking pattern 135 therein may be arranged around the antenna pattern. Accordingly, while the self-radiation and the induced current are blocked by the dummy electrode 130, the antenna pattern may be prevented from being visually recognized due to the positional electrode arrangement deviation.

Fig. 3 is a schematic top plan view for explaining radiation characteristics in the antenna device according to the comparative example.

Referring to fig. 3, in a comparative example, a dummy electrode 137 may be formed around the radiation electrode 112, in which a member (such as the blocking pattern 135) serving as a filter according to an embodiment of the present invention is omitted.

In this case, a fringe field may be generated from the radiation electrode 112 to the dummy electrode 137, as indicated by a black thick arrow. Accordingly, as indicated by the dotted arrow, an induced current caused by a fringe field may be generated in the dummy electrode 137.

By the induced current, self-radiation may occur in the dummy electrode 137, and radiation interference may occur in the radiation electrode 112, thereby causing gain and directivity degradation, impedance mismatch, and the like.

However, according to the above-described exemplary embodiment, the blocking pattern 135 may block or filter the fringe field directed to the dummy electrode 130. Therefore, the field concentration between the radiation electrode 112 and the second electrode layer 90 can be improved, and radiation reliability and gain characteristics can be improved.

Fig. 4 is a schematic top plan view illustrating an antenna apparatus according to some example embodiments.

Referring to fig. 4, a plurality of antenna patterns including a radiation electrode 112 and a transmission line 114 may be arranged in an array form. For example, the antenna patterns may be regularly arranged in the row direction. The pad electrode 116 may be provided for each antenna pattern, and feeding and antenna driving control may be independently performed for each antenna pattern through the signal pad 116 a.

The blocking pattern 135 may be disposed along the circumference of each antenna pattern. In some implementations, the blocking patterns 135 may be distributed over substantially the entire area of the dummy electrode 130. Therefore, even in an area relatively distant from the radiation electrode 112, the self-radiation of the dummy electrode 130 can be blocked, thereby improving radiation reliability and efficiency of the radiation electrode 112.

Fig. 5 is a schematic top plan view illustrating an antenna apparatus according to some example embodiments.

Referring to fig. 5, adjacent radiation electrodes may be coupled to form a radiation electrode group 113.

For example, the first and second radiation electrodes 112a and 112b adjacent to each other may be coupled by the transmission line 114 to form the radiation electrode group 113. The pad electrode 116 may be provided for each radiation electrode group 113 so that independent feeding and control can be performed.

Accordingly, a plurality of radiation electrodes may be formed into a group, so that independent antenna driving may be achieved for each radiation electrode group 113 while amplifying the amount of gain by the radiation electrodes.

The barrier patterns 135 may be arranged along the circumference of the radiation electrode group 113. In addition, the barrier pattern 135 may be disposed between the first and second radiation electrodes 112a and 112b included in the radiation electrode group 113. Accordingly, induced current and self-radiation generated in a portion of the dummy electrode 130 between the first and second radiation electrodes 112a and 112b may be blocked.

Fig. 6 is a schematic top plan view illustrating a display device according to an exemplary embodiment. For example, fig. 6 illustrates an outer shape of a window including a display device.

Referring to fig. 6, the display device 200 may include a display area 210 and a peripheral area 220. The peripheral region 220 may be disposed at both lateral portions and/or both end portions of the display region 210.

In some embodiments, the antenna device may be inserted into the peripheral region 220 of the display device 200 in the form of a patch or a film. In some embodiments, the radiation electrode 112 of the above-described film antenna may be disposed to at least partially correspond to the display region 210 of the display device 200, and the pad electrode 116 of the display device 200 may be disposed to correspond to the peripheral region 220.

The peripheral region 220 may correspond to, for example, a light shielding portion or a frame portion of the image display device. In addition, a driving circuit unit (such as an IC chip) of the display device 200 and/or the antenna device may be disposed in the peripheral area 220.

The pad electrode 116 of the antenna device may be adjacent to the driving circuit, so that a signal transmission/reception path may be shortened and signal loss is suppressed.

In some implementations, the dummy electrode 130 of the antenna device can be disposed in the display area 210. The second electrode layer 90 of the antenna device may also be arranged in the display area 210. The dummy electrode 130 may be added such that the electrode line included in the antenna pattern is prevented from being visually recognized, and the blocking pattern 135 may be distributed within the dummy electrode 130 to suppress radiation interference caused by the dummy electrode 130. In addition, operational reliability within a display panel included in the display device 200 may also be improved by suppressing induced current in the dummy electrode 130.

Hereinafter, preferred embodiments are set forth to more particularly describe the present invention. However, the following examples are given only to illustrate the present invention, and it will be apparent to those skilled in the relevant art that various changes and modifications are possible within the scope and spirit of the present invention. Such changes and modifications are formally included in the appended claims.

Examples of the invention

First and second electrode layers having a mesh structure are formed on upper and lower surfaces of a glass (0.7T) dielectric layer using an Alloy (APC) of silver (Ag), palladium (Pd), and copper (Cu), respectively. The line width of the electrode lines included in the mesh structure was 3 μm, and the electrode thickness (or height) was

The first electrode layer was etched to form first separation regions (width 3 μm) to form a dummy electrode and a radiation electrode. The size of the radiation electrode was 1.86mm × 2.17mm (4.03 mm)²)。

The dummy electrode is partially etched to form a second separation region to form a blocking pattern around the radiation electrode. While changing the size (area) of each barrier pattern, an antenna device sample was prepared.

Comparative example

An antenna device sample was prepared by the same method as in the example except that the formation of the blocking pattern in the dummy electrode was omitted.

Experimental examples

(1) Evaluation of antenna drive characteristics

To the direction ofExamples of the inventionAnd comparingExamples of the inventionProvides a feed and measures S-parameters (S21) and resonance frequency using a vector network analyzer (manufacturer: Anritsu, model name MS 4644B). Specifically, a measurement port was connected to the radiation electrode and the barrier pattern (in comparison)Examples of the inventionMiddle dummy electrode), and the ratio is evaluated by calculating the current supplied to the radiation electrode that is transmitted or absorbed into the barrier pattern (or dummy electrode) by the following equation 1.

[ equation 1]

S21(dB) — 10log [ (power in barrier pattern or dummy electrode)/(power input of radiation electrode) ]

The evaluation results are shown in table 1 below.

[ Table 1]

Referring to table 1, when the dummy electrode includes the blocking pattern, radiation loss is significantly reduced.

In the comparative example, the current supplied to the radiation electrode is excessively absorbed by the dummy electrode, and the radiation loss is significantly increased.

In examples 3 to 5, the driving characteristics in which the radiation loss in the dummy electrode or the barrier pattern is suppressed are realized in a frequency range of, for example, a 5G band (about 26GHz to 35 GHz).