JP2016134772A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device capable of achieving double resonance even in a limited antenna occupation area and of securing sufficient antenna performance.SOLUTION: An antenna device comprises a substrate main body 2, and a ground surface GND, a first element 3 and a second element 4 that are pattern-formed on the substrate main body 2. The first and second elements are provided so as to be contacted with one side 2a of the substrate main body, and are formed in an antenna occupation area AOA. The first element has first to fourth extension parts E1-E4. A base end of the fourth extension part is connected with a ground surface adjacent via a first passive element P1, and a front end of the fourth extension part is connected with the ground surface adjacent via a second passive element P2. The second element 4 has: a fifth extension part E5 that extends from a front end of the first extension part in an opposite direction to the second extension part; and a sixth extension part E6 that extends from a front end of the fifth extension part in a direction toward the one side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna device capable of achieving multiple resonances.

  2. Description of the Related Art Conventionally, in a communication device, one of antenna elements mounted on a wireless circuit board is a surface mount antenna using a dielectric, so-called dielectric antenna. In this dielectric antenna, a radiation electrode for performing an antenna operation is provided on a dielectric substrate. Conventionally, an open antenna type such as a monopole antenna or an inverted F antenna using the dielectric antenna has been mainly used.

  Usually, in the case of an open type antenna such as a monopole type or an inverted F type, since the impedance of the open end is high, it is necessary to secure the distance between the mounted antenna element and the ground as long as possible. Therefore, in order to sufficiently secure the antenna performance, it is necessary to remove the ground around the mounted antenna element and separate the antenna element from the ground plane on the substrate on which the ground plane is formed. However, in fact, when a dielectric antenna is mounted on a substrate as an antenna element, the space that can be used as an antenna (antenna occupying area) is often limited in consideration of downsizing of the device, and the influence of the ground around the antenna element As a result, the antenna performance cannot be fully exhibited. Therefore, in order to reduce the influence of the ground as much as possible, the position where the antenna element is mounted is often mounted on the edge of the substrate or the like.

  For this reason, conventionally, for example, in Patent Document 1, a capacitive power supply type radiation electrode that performs an antenna operation is provided on a base body, and the base body is mounted in a non-ground region of the circuit board. An antenna structure has been proposed in which a grounding line for electrically connecting the radiation electrode is provided. The grounding line of this antenna structure has a shape having a folded portion. Patent Document 2 includes a surface-mount antenna in which a radiation electrode for performing antenna operation is formed on a base, a ground region in which a ground electrode is formed, and a non-ground region in which no ground electrode is formed. There is described an antenna structure having a substrate and one end side of the radiation electrode being a ground connection portion grounded to the ground electrode.

  However, the technique described in Patent Document 1 has a problem that the antenna performance largely depends on the folded portion of the grounding line, so that the antenna performance is deteriorated and unstable elements are increased depending on the folded portion. . That is, since it is necessary to secure the length of the folded portion and increase the antenna occupation area, sufficient antenna performance cannot be obtained when the antenna occupation area is limited.

  As an antenna device corresponding to such an antenna occupation region, for example, an antenna device described in Patent Document 3 has been developed. In this antenna device, an antenna element of a dielectric antenna that is connected along one side of a substrate body with an electrode part of one end connected to the tip part of a feeding pattern extending in the antenna occupation area, and the other end of the antenna element A second passive element connected between the electrode section and the adjacent ground plane; and a ground connection pattern having an inductance component connecting the tip of the power feeding pattern and the ground plane on the opposite side of the antenna element. . As a result, high-frequency current to the ground plane can be suppressed, and high antenna performance can be obtained even in a small antenna occupation region. Therefore, according to this antenna device, the maximum antenna performance can be realized even in a small space, and a high degree of installation freedom can be obtained.

  On the other hand, it is desired to perform various communications at a plurality of resonance frequencies in one antenna device, and the antenna device is made to have multiple resonances. For example, Patent Document 4 discloses an antenna device including an insulating substrate body, and a ground surface, a first element, a second element, and a third element each formed by patterning a metal foil on the surface of the substrate body. Have been described. In this antenna device, the first element extends at a distance from the stray capacitance between the second element and the third element and the stray capacitance between the first element and the ground plane so as to be generated. Thus, double resonance is realized.

International Publication No. WO2006 / 120762 International Publication No. WO2008 / 035526 JP 2012-119932 A JP 2012-89956 A

  The technique described in Patent Document 3 is a single-band antenna device having one resonance frequency, but there is a demand for an antenna device that has multiple resonances in the limited antenna occupation region as described above. However, due to the multiple resonance, the pattern arrangement of the antenna element in the antenna device described in Patent Document 4 cannot be applied as it is to the antenna occupation region, and it is difficult to obtain sufficient antenna performance.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an antenna device that can achieve multiple resonances even in a limited antenna occupation region and can ensure sufficient antenna performance.

  The present invention employs the following configuration in order to solve the above problems. That is, an antenna device according to a first invention includes an insulating substrate body, a ground surface patterned with metal foil on at least one of a front surface and a back surface of the substrate body, a first element, and a second element, respectively. The first element and the second element are provided in contact with one side of the substrate body as a region where the ground surface is not formed, and a portion other than the portion in contact with the one side is in contact with the ground surface. The first element is formed in the antenna occupying region, and the first element extends in a direction toward the one side with a feeding point provided on a base end side close to a portion of the ground plane facing the one side. A second extending portion extending in a direction orthogonal to the first extending portion, the base end being connected to the distal end of the first extending portion, and extending from the second extending portion toward the one side A third extension extending in the direction, and a fourth extension extending along the second extension from the tip of the third extension, and the fourth extension A base end is connected to the adjacent ground plane via a first passive element, and a tip end of the fourth extending portion is connected to the adjacent ground plane via a second passive element, and the second element Is a fifth extension extending from the tip of the first extension in the opposite direction to the second extension, and a second extension extending from the tip of the fifth extension toward the one side. It has 6 extending parts.

In this antenna device, since at least one of the front surface and the back surface of the substrate main body is provided with the ground surface, the first element, and the second element, each of which is patterned with a metal foil, between each element and the ground surface It is possible to make multiple resonances by effectively using each stray capacitance between them.
In particular, the second element extends in the direction from the tip of the first extension to the side extending from the tip of the first extension to the one side from the tip of the fifth extension. Since the sixth extending portion is provided, the multiple resonance can be realized by utilizing the opening region below the fourth extending portion. In the second element, the stray capacitance is generated between the sixth extending portion and the fourth extending portion, so that the gain does not decrease even if the sixth extending portion is short, and multiple resonance can be achieved.
Further, both ends of the fourth extending portion are connected to the adjacent ground plane via the first passive element and the second passive element, so that the left and right loop shapes are formed between the first element and the inner edge of the ground plane. It is formed. As a result, the high-frequency current flows through the two loop shapes, so that the flow of the high-frequency current spreading from both ends of the fourth extending portion to the ground surface is suppressed, and the limited antenna occupying region is efficiently used and is high. Antenna performance can be obtained. In addition, it is possible to reduce the influence of peripheral components during mounting.

The antenna device according to a second aspect of the present invention is the antenna device according to the first aspect, wherein the first element extends in a direction from the tip of the fourth extension portion toward the one side, and the seventh extension. And an eighth extending portion extending from the distal end of the extending portion along the fourth extending portion and connected to the adjacent ground plane via the third passive element. Features.
That is, in this antenna device, the first element extends from the distal end of the fourth extending portion to the seventh extending portion extending in the direction toward the one side, and from the distal end of the seventh extending portion to the fourth extending portion. And an eighth extending portion whose tip is connected to the adjacent ground plane via the third passive element, so that the high-frequency current flowing to the second element is in the second to fourth lengths. The resonance frequency obtained mainly by the second element by flowing to the ground surface through the existing portion and the seventh and eighth extending portions can be adjusted. In addition, since the seventh extending portion and the eighth extending portion are arranged outside the fourth extending portion, it is possible to ensure a wide opening region below the fourth extending portion.

An antenna device according to a third invention is the antenna device according to the first or second invention, wherein an antenna element of a dielectric antenna is connected to the fourth extending portion.
That is, in this antenna device, the element length of the loading element that does not self-resonate at a desired resonance frequency can be shortened, the impedance can be increased, and the stray capacitance can be increased. In addition, the size and the antenna characteristics can be improved.
In particular, since the antenna element of the dielectric antenna is connected to the fourth extending portion, the antenna element and the second passive element form a series resonance, and high-frequency current efficiently flows through the two loop shapes. Thus, the flow of high-frequency current spreading from both ends of the fourth extending portion to the ground surface can be further suppressed.

In the antenna device according to a fourth invention, in any one of the first to third inventions, a fourth passive element is connected to the third extending portion, and a fifth passive element is connected to the fifth extending portion. It is characterized by being.
That is, in this antenna device, each resonance frequency can be flexibly adjusted by selecting each passive element, and an antenna device capable of making multiple resonances according to design conditions can be obtained. Thus, since each resonance frequency can be flexibly adjusted in terms of the antenna configuration, the resonance frequency can be switched, and the adjustment location by a passive element or the like can be changed according to the application or device.

The present invention has the following effects.
That is, according to the antenna device of the present invention, each element is provided with the above-described ground plane, the first element, and the second element that are patterned with metal foil on at least one of the front surface and the back surface of the substrate body. A stray capacitance is generated between the ground and the ground surface, and multiple resonances can be achieved in a limited antenna occupation region.
In particular, the fifth element is formed below the fourth extension, and extends from the tip of the first extension in the direction opposite to the second extension, and the fifth extension. Since it has the 6th extension part extended in the direction which goes to the said one side from the front-end | tip of this, a double resonance is attained. In the second element, the stray capacitance is generated between the sixth extending portion and the fourth extending portion, so that the gain does not decrease even if the sixth extending portion is short, and multiple resonance can be achieved.
Further, both ends of the fourth extending portion are connected to the adjacent ground plane via the first passive element and the second passive element, so that the flow of high-frequency current spreading from both ends of the fourth extending section to the ground plane is achieved. It is possible to obtain high antenna performance by efficiently using the limited antenna occupation area.
Therefore, the antenna device of the present invention can achieve multiple resonances even in a space-saving manner, achieve high antenna performance, and obtain a high degree of installation freedom.

It is a top view which shows one Embodiment of the antenna device which concerns on this invention. In this embodiment, it is a wiring diagram which shows the main area | regions which contribute to each resonance frequency. In this embodiment, it is a wiring diagram which shows the stray capacitance produced with an antenna apparatus. In this embodiment, they are a perspective view (a), a plan view (b), a front view (c), a bottom view (d), and a side view (e) showing an antenna element. In this embodiment, it is a graph which shows the measurement result of VSWR characteristic (voltage standing wave ratio). In this embodiment, it is a graph which shows the measurement result of radiation efficiency.

  Hereinafter, an embodiment of an antenna device according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, the antenna device 1 according to the present embodiment includes an insulating substrate body 2 and a ground plane that is patterned with a metal foil such as a copper foil on at least one of the front and back surfaces of the substrate body 2. A GND, a first element 3 and a second element 4 are provided.
The first element 3 and the second element 4 are provided in contact with the one side 2a of the substrate body 2 as regions where the ground surface GND is not formed, and the portions other than the part in contact with the one side 2a are in contact with the ground surface GND. The antenna occupying area AOA is formed.

  The first element 3 includes a first extending portion E1 that is provided with a feeding point FP on the base end side adjacent to the portion facing the one side 2a of the ground surface GND and extends in a direction toward the one side 2a, A base end is connected to the distal end of the first extending portion E1, a second extending portion E2 extending in a direction perpendicular to the first extending portion E1, and a second extending portion E2 extending in a direction toward the one side 2a. It has the 3rd extension part E3 which exists, and the 4th extension part E4 extended along the 2nd extension part E2 from the front-end | tip of the 3rd extension part E3.

The base end of the fourth extension E4 is connected to the adjacent ground plane GND via the first passive element P1, and the tip of the fourth extension E4 is adjacent via the second passive element P2. Connected to the ground plane GND.
The second element 4 includes a fifth extending portion E5 extending in the direction opposite to the second extending portion E2 from the front end of the first extending portion E1, and a side 2a from the front end of the fifth extending portion E5. It has the 6th extension part E6 extended in the direction to go.

The first element 3 extends along the fourth extending portion E4 from the distal end of the seventh extending portion E7 and the seventh extending portion E7 extending in the direction from the distal end of the fourth extending portion E4 toward the one side 2a. And an eighth extending portion E8 whose tip is connected to the adjacent ground plane GND via the third passive element P3.
An antenna element AT of a dielectric antenna is connected to the fourth extending portion E4.
Further, a fourth passive element P4 is connected to the third extending part E3, and a fifth passive element P5 is connected to the fifth extending part E5.
Further, a sixth passive element P6 is connected to the seventh extending part E7. In addition, when the 7th extension part E7 is short, 6th passive element P6 itself including the connection part with the 4th extension part E4 and the 8th extension part E8 is made into the 7th extension part E7.

The board body 2 is a general printed board, and in the present embodiment, a printed board made of glass epoxy resin or the like is employed.
The feed point FP is connected to a feed point of a high frequency circuit (not shown). For example, a core wire of a coaxial cable (not shown) connected to a high-frequency circuit is connected to the feed point FP, and the ground wire of the coaxial cable is connected to a nearby ground plane GND. A high frequency circuit is mounted in the area of the ground plane GND.
For example, an inductor, a capacitor, a resistor, or a jumper line is used as each passive element.

The antenna element AT is a loading element that does not self-resonate at a desired resonance frequency, and is a chip antenna in which a conductor pattern 122 such as Ag is formed on the surface of a dielectric 121 such as ceramic as shown in FIG. is there. Both end portions of the conductor pattern 122 are connected to opposite ends of the divided portion of the fourth extending portion E4 for mounting, so that the antenna element AT becomes a part of the fourth extending portion E4.
As the antenna element AT, elements having different lengths, widths, conductor patterns, and the like may be selected according to the setting of the resonance frequency and the like. Depending on the desired frequency, the dielectric 121 used in the antenna element AT may be a magnetic material or a composite material in which a dielectric and a magnetic material are mixed.

Further, the antenna element AT includes not only an inductance component but also a capacitance component, and impedance is determined. The impedance of the antenna element AT is preferably set to a high impedance with respect to the operating frequency.
That is, the antenna element size is selected from the frequency used and the dielectric material used. Further, the number of turns of the conductor pattern 122, the pattern width, etc. are optimized according to the required antenna performance (antenna gain, bandwidth, etc.). For example, in the antenna element AT shown in FIG. 4, the impedance is optimized with respect to the used frequency by setting the impedance value based on the number of turns of the conductor pattern 122 and the capacitance value based on the line width of the conductor pattern 122.

The first element 3 and the second element 4 extend at a distance from each other so as to generate a stray capacitance between them and a stray capacitance between the ground plane GND.
That is, as shown in FIG. 3, the floating capacitance Ca between the second extending portion E2 and the ground plane GND, and the floating between the antenna element AT, the second extending portion E2, and the fifth extending portion E5. The capacitance Cb, the stray capacitance Cc between the antenna element AT and the eighth extension E8, the stray capacitance Cd between the third extension E3 and the ground plane GND, and the base of the eighth extension E8 The stray capacitance Ce between the end portion and the ground plane GND, the stray capacitance Cf between the sixth extension portion E6 and the fourth extension portion E4, and the gap between the sixth extension portion E6 and the ground plane GND. Stray capacitance Cg, stray capacitance Ch between the sixth extending portion E6 and the third extending portion E3, and stray capacitance Ci between the fifth extending portion E5 and the ground plane GND can be generated. is there.

  Next, each resonance frequency in the antenna device of this embodiment will be described with reference to FIGS. 5 and 6.

  In the antenna device 1 according to the present embodiment, as shown in FIGS. 5 and 6, multiple resonances are made in two frequency bands in the order of the first resonance frequency f1 and the second resonance frequency f2 from the lowest frequency. .

Hereinafter, these resonance frequencies will be described in detail.
“About the first resonance frequency f1”
The frequency of the first resonance frequency f1 includes the first extension E1, the second extension E2, the third extension E3, the fourth extension E4 including the antenna element AT, and the stray capacitances Ca and Cb. , Cc, Cd can be set and adjusted.
Further, the impedance adjustment of the first resonance frequency f1 can be performed by setting each of the stray capacitances Ca, Cb, Cc, Cd and the third passive element P3 and the sixth passive element P6.
Further, the final frequency adjustment can be flexibly performed by selecting the first passive element P1 and the second passive element P2.
The final impedance adjustment can be flexibly performed by selecting the fourth passive element P4.
In this way, the first resonance frequency f1 is adjusted mainly at the portion of the one-dot chain line A1 in FIG.

“About the second resonance frequency f2”
The frequency of the second resonance frequency f2 can be set and adjusted by the second element 4 and the stray capacitances Cb, Cc, Cd, Ce, Cf, Cg, Ch, and Ci.
Further, the impedance adjustment of the second resonance frequency f2 can be performed by setting each of the stray capacitances Cb, Cc, Cd, Ce, Cf, Cg, Ch, and Ci.
Furthermore, the final frequency adjustment can be flexibly performed by selecting the fifth passive element P5.
The final impedance adjustment can be flexibly performed by selecting the third passive element P3, the fourth passive element P4, and the sixth passive element P6.
In this way, the second resonance frequency f2 is adjusted mainly at the portion of the two-dot chain line A2 in FIG.

As described above, the antenna device 1 according to the present embodiment includes the ground surface GND, the first element 3 and the second element 4 that are patterned with the metal foil on at least one of the front surface and the back surface of the substrate body 2. Therefore, it is possible to make multiple resonances by effectively using each stray capacitance between each element and between the ground plane GND.
In particular, the second element 4 includes a fifth extending portion E5 extending in the direction opposite to the second extending portion E2 from the tip of the first extending portion E1, and the one side 2a from the tip of the fifth extending portion E5. Since it has the 6th extension part E6 extended in the direction which goes to, double resonance becomes possible using the opening area under the 4th extension part E4. In the second element 4, the stray capacitance Cf is generated between the sixth extending portion E6 and the fourth extending portion E4, so that the gain does not decrease even if the sixth extending portion E6 is short, and multiple resonances occur. Can be

  Further, both ends of the fourth extending portion E4 are connected to the adjacent ground plane GND via the first passive element P1 and the second passive element P2, so that the first element 3 and the inner edge of the ground plane GND are connected. Two left and right loop shapes are formed. As a result, the high-frequency current flows in the two loop shapes, thereby suppressing the flow of the high-frequency current spreading from both ends of the fourth extending portion E4 to the ground plane GND, and efficiently using the limited antenna occupation area AOA. Thus, high antenna performance can be obtained. In addition, it is possible to reduce the influence of peripheral components during mounting.

  In addition, the first element 3 has a seventh extending portion E7 extending in the direction from the tip of the fourth extending portion E4 toward the one side 2a, and a fourth extending portion E4 from the tip of the seventh extending portion E7. And an eighth extending portion E8 whose tip is connected to the adjacent ground plane GND via the third passive element P3, so that the high-frequency current flowing to the second element 4 is The resonance frequency mainly obtained by the second element 4 can be adjusted by flowing to the ground plane GND via the second to fourth extending portions E2 to E4 and the seventh and eighth extending portions E7 and E8. In addition, since the seventh extending portion E7 and the eighth extending portion E8 are arranged outside the fourth extending portion E4, it is possible to ensure a wide opening region below the fourth extending portion E4. it can.

In addition, the antenna element AT, which is a loading element that does not self-resonate at a desired resonance frequency, can shorten the element length, increase the impedance, and increase the stray capacitance. It is possible to improve the antenna characteristics.
In particular, since the antenna element AT of the dielectric antenna is connected to the fourth extending portion E4, the antenna element AT and the second passive element P2 form a series resonance, and the high frequency current is efficient in the above two loop shapes. Therefore, the flow of the high-frequency current spreading from both ends of the fourth extending portion E4 to the ground surface GND can be further suppressed.

  Furthermore, by selecting each passive element, each resonance frequency can be adjusted flexibly, and an antenna device capable of making multiple resonances according to design conditions can be obtained. Thus, since each resonance frequency can be flexibly adjusted in terms of the antenna configuration, the resonance frequency can be switched, and the adjustment location by a passive element or the like can be changed according to the application or device.

  Next, the results of measuring the VSWR characteristics (voltage standing wave ratio) of an example in which the antenna device of the above embodiment is actually manufactured will be described with reference to FIG.

In these measurements, the following passive elements were used.
First passive element P1: 0.6 pF capacitor Second passive element P2: 0.9 pF capacitor Third passive element P3: 0.5 pF capacitor Fourth passive element P4: 1.8 nH inductor Fifth passive element P5: 1.5 nH inductor sixth passive element P1: 0.3 pF capacitor The size of the antenna occupation area AOA was 6 mm × 6 mm.

As can be seen from FIG. 5, the first and second resonance frequencies f1, f2 are obtained with good bandwidth.
The first resonance frequency f1 was 2514.0 MHz, and the bandwidth was 133.1 MHz (VSWR ≦ 3.0). The second resonance frequency f2 was 5462.50 MHz, and the bandwidth was 512.9 MHz (VSWR ≦ 3.0).

FIG. 6 shows the result of measuring the radiation efficiency characteristics of the antenna device according to the example.
As can be seen from this measurement result, the total radiation efficiency was -1.9 dB at the first resonance frequency f1 and -2.2 dB at the second resonance frequency f2.

  In addition, this invention is not limited to the said embodiment and said Example, A various change can be added in the range which does not deviate from the meaning of this invention.

For example, in the above-described embodiment, the antenna element is provided in the fourth extension part. However, the antenna element may be provided in another extension part to shorten the element, thereby reducing the size of the entire apparatus. . For example, an antenna element may be provided in the eighth extension portion.
In addition, as described above, it is preferable to connect the antenna element to be a part of the element. However, the antenna element may not be connected, and may be a fourth extending portion that is extended only by a metal foil such as a copper foil. . At this time, in order to increase the impedance, at least a part of the fourth extending part is formed into a narrow pattern narrower than the other parts, or a meander pattern extending in a fixed direction as a whole while zigzag is folded back. It is preferable.
Furthermore, when there is a margin in the substrate size, a part of the element may be replaced with a pattern in which a linear or plate-like metal is folded. Moreover, you may make it the pattern swirled in shapes, such as a spiral shape, using a through hole with respect to the front and back of the same board | substrate body.

  DESCRIPTION OF SYMBOLS 1 ... Antenna apparatus, 2 ... Board | substrate main body, 2a ... One side of board | substrate main body, 3 ... 1st element, 4 ... 2nd element, AOA ... Antenna occupied area, AT ... Antenna element, E1 ... 1st extension part, E2 ... 2nd extension part, E3 ... 3rd extension part, E4 ... 4th extension part, E5 ... 5th extension part, E6 ... 6th extension part, E7 ... 7th extension part, E8 ... 8th Extension part, FP ... feed point, GND ... ground plane, H ... through hole, P1 ... first passive element, P2 ... second passive element, P3 ... third passive element, P4 ... fourth passive element, P5 ... first 5 passive elements, P6 ... 6th passive element

Claims (4)

An insulating substrate body;
At least one of the front surface and the back surface of the substrate body includes a ground surface patterned with a metal foil, a first element, and a second element,
The antenna in which the first element and the second element are provided in contact with one side of the substrate body as a region where the ground surface is not formed, and a part other than the part in contact with the one side is in contact with the ground surface Formed in the occupied area,
The first element is provided with a feeding point on a base end side close to a portion facing the one side of the ground surface, and extends in a direction toward the one side, and the first extension portion. A second extending portion extending in a direction orthogonal to the first extending portion and a third extending portion extending in a direction from the second extending portion toward the one side. And a fourth extension part extending along the second extension part from the tip of the third extension part,
The base end of the fourth extending portion is connected to the adjacent ground plane via a first passive element, and the tip end of the fourth extending portion is connected to the adjacent ground plane via a second passive element. Connected,
The second element extends in a direction from the tip of the first extension portion in the direction opposite to the second extension portion, and from the tip of the fifth extension portion toward the one side. An antenna device comprising: an extended sixth extending portion. The antenna device according to claim 1,
The first element extends along the fourth extending portion from the distal end of the seventh extending portion, and a seventh extending portion extending in a direction from the distal end of the fourth extending portion toward the one side. An antenna device comprising: an eighth extending portion having a distal end connected to the adjacent ground surface through a third passive element. In the antenna device according to claim 1 or 2,
An antenna device, wherein an antenna element of a dielectric antenna is connected to the fourth extending portion. In the antenna device according to any one of claims 1 to 3,
A fourth passive element is connected to the third extension;
An antenna device, wherein a fifth passive element is connected to the fifth extending portion.