JP2017038153A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device which allows a band to be made wider even in a narrow antenna occupation area and further allows complex resonance so that sufficient antenna performance can be secured.SOLUTION: The antenna device comprises a substrate main body 2, and a ground surface GND pattern-formed on the main body and a first element 3. The first element is provided adjacent to a side 2a of the substrate main body and formed in an antenna occupation area AOA. The first element has: a first extending portion E1 in which is provided a power feed point FP; a second extending portion E2 connected to the first extending portion and extended in a direction toward the side; a third extending portion E3, connected to the second extending portion E2, which extends in a direction along the side, toward a side separating from the power supply point, a tip of which is connected to the ground surface S adjacent thereto through a first passive element P1; and a fourth extending portion E4, connected to the first extending portion, which extends in a direction toward the side, a tip of which is connected to the ground surface adjacent thereto through a second passive element P2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna device capable of widening the bandwidth and further capable of achieving multiple resonances.

2. Description of the Related Art Conventionally, various miniaturized antenna devices have been proposed for communication equipment. For example, in Patent Document 1, an antenna element of a dielectric antenna in which an electrode portion at one end is connected to a tip portion of a power feeding pattern extending in an antenna occupation region and is installed along one side of a substrate body, and the antenna element A passive element connected between the electrode portion at the other end and the adjacent ground surface, and a ground connection pattern having an inductance component by connecting the tip portion of the feeding pattern and the ground surface on the opposite side of the antenna element. An antenna device has been proposed.
In this antenna device, high-frequency current to the ground surface can be suppressed, and high antenna performance is obtained even in a small antenna occupation region.

  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 2 discloses an antenna device including an insulating substrate body, and a ground surface, a first element, a second element, and a third element that are 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.

JP 2012-119932 A JP 2012-89956 A

However, the following problems remain in the above-described conventional technology.
In the antenna device described in Patent Document 1, high antenna performance is obtained even in a small antenna occupation region, but higher antenna performance, in particular, wider bandwidth is demanded.
Further, the antenna device described in Patent Document 1 is a single-band antenna device having one resonance frequency, but an antenna device that is double-resonated in a limited antenna occupation region as in Patent Document 1 described above. It is requested. However, due to the double resonance, the pattern arrangement of the antenna elements in the antenna device described in Patent Document 2 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-mentioned problems, and can achieve a wide band even in a limited narrow antenna occupying region, and further can have multiple resonances, thereby ensuring sufficient antenna performance. An object is to provide an apparatus.

  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, and at least one of a front surface and a back surface of the substrate body, each having a ground surface and a first element patterned with a metal foil, The first element is provided in contact with one side of the substrate body as a region where the ground surface is not formed, and is formed in an antenna occupation region in contact with the ground surface except for a portion in contact with the one side, A first extending portion that is disposed in the vicinity of the portion of the ground surface facing the one side and that extends in a direction along the one side and is provided with a feeding point; and one end of the first extending portion. A second extending portion having an end connected and extending in a direction toward the one side; a base end connected to a distal end of the second extending portion; a direction along the one side and a side away from the feeding point Extended And a third extending portion whose tip is connected to the adjacent ground plane via the first passive element, and a base end connected to the other end of the first extending portion and extending in a direction toward the one side. And a fourth extending portion whose tip is connected to the adjacent ground plane via a second passive element.

In the antenna device of the present invention, the first element has a base end connected to the other end of the first extending portion and extends in the direction toward the one side, and the tip is on the ground plane adjacent via the second passive element. Since it has the 4th extension part connected, since a high frequency current flows into a ground plane via the 4th extension part extended toward the one side, it can be broadened by making high impedance. . That is, the stray capacitance generated between the fourth extension portion and the other extension portion, the stray capacitance generated between the fourth extension portion and the ground plane, and the inductance of the fourth extension portion itself To increase the impedance and to widen the band at the resonance frequency.
In addition, the third extending portion is connected to the adjacent ground surface via the first passive element, so that the first extending portion, the second extending portion, the third extending portion, and the inner edge portion of the ground surface A loop shape is formed. Furthermore, a loop shape is formed by the 1st extension part, the 4th extension part, and the inner edge part of a ground surface by connecting a 4th extension part to the adjacent ground surface via a 2nd passive element. The As a result, the high-frequency current flows in the two loop shapes described above, so that the two flows of the high-frequency current spreading from the third extension portion and the fourth extension portion to the ground surface are suppressed, and the limited antenna occupying region is efficiently used. Can be used effectively to obtain high antenna performance. In addition, it is possible to reduce the influence of peripheral components during mounting.

An antenna device according to a second invention includes, in the first invention, a second element patterned with metal foil on at least one of the front surface and the back surface of the substrate body, and the second element occupies the antenna. It has a 5th extension part which is formed in a field and has a base end connected in the middle of the 1st extension part, and extends in the direction which goes to the one side.
That is, 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 that are each patterned with metal foil, It is possible to make multiple resonances by effectively using each stray capacitance between them.
In particular, since the second element has a fifth extending portion whose base end is connected in the middle of the first extending portion and extends in the direction toward the one side, the fifth extending portion is the second extending portion. By extending between the extension part and the fourth extension part, between the fifth extension part and the second extension part and between the fifth extension part and the fourth extension part. Each can generate stray capacitance.

The antenna device according to a third aspect of the present invention is the antenna device according to the second aspect, wherein the second element has a proximal end connected to a distal end of the fifth extending portion and a direction along the third extending portion and the second extending portion. It has the 6th extension part extended toward the side away from a passive element, It is characterized by the above-mentioned.
That is, in this antenna device, the second element extends in the direction along the third extension portion and toward the side away from the second passive element with the base end connected to the tip end of the fifth extension portion. Since there are six extending portions, stray capacitance is also generated between the sixth extending portion and the third extending portion, and the resonance frequency and impedance can be adjusted.

An antenna device according to a fourth invention is the antenna device according to the second or third invention, wherein the second element has a base end connected to one end side of the first extension portion and extends along the third extension portion. And it has the 7th extension part extended toward the side spaced apart from the said electric power feeding point, It is characterized by the above-mentioned.
That is, in this antenna device, the second element is connected to the one end side of the first extension portion, and the seventh element extends in the direction along the third extension portion and the side away from the feeding point. Since the extension portion is included, stray capacitances are generated between the seventh extension portion and the third extension portion and between the seventh extension portion and the ground plane, respectively, and the resonance frequency and impedance are further increased. Can be adjusted.

An antenna device according to a fifth invention is characterized in that, in any one of the second to fourth inventions, a third passive element is connected to the fifth extending portion.
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 antenna device according to a sixth aspect of the present invention is the antenna device according to any one of the second to fifth aspects, wherein the antenna occupying region is disposed on a surface side region disposed on a surface of the substrate body and on a back surface of the substrate body. And a rear surface region opposite to the front surface region, the first element is formed in the front surface region, the second element is formed in the rear surface region, the first element and the The second elements are connected by through holes.
That is, in this antenna device, the second element is formed in the back surface region, and the first element and the second element are connected by a through hole, so that the first element and the ground surface are surrounded by the front surface region. The opening area of the selected region can be widened, and it is possible to widen the band at the resonance frequency obtained mainly by the first element.

An antenna device according to a seventh invention is characterized in that, in any one of the first to sixth inventions, an antenna element of a dielectric antenna is connected to the third 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 third extending portion, series resonance is constituted by the antenna element and the first passive element, and the high-frequency current is formed in the loop shape via the third extending portion. Efficiently flows, it is possible to further suppress the flow of a high-frequency current spreading from the third extending portion to the ground surface.

The present invention has the following effects.
That is, according to the antenna device of the present invention, the first element has a proximal end connected to the other end of the first extending portion and extends in the direction toward the one side, and the distal end is adjacent to the first passive element via the second passive element. Since it has the 4th extension part connected to the ground plane which carries out, it can be made high impedance by the 4th extension part extended toward the above-mentioned one side, and a broad band is possible.
Further, by providing the second element, stray capacitance is generated between each element and between the ground plane and the like, and multiple resonance can be achieved in a limited antenna occupation region.
Therefore, the antenna device of the present invention can achieve a wide band even in a limited narrow antenna occupying region, and further can have multiple resonances, thereby ensuring sufficient antenna performance.

1 is a plan view showing a first embodiment of an antenna device according to the present invention. In 1st Embodiment, it is a wiring diagram which shows the main area | regions which contribute to each resonance frequency. FIG. 3 is a wiring diagram showing stray capacitance generated in the antenna device in the first embodiment. In a 1st embodiment, it is a figure showing a typical equivalent circuit. In 1st Embodiment, it is a perspective view (a), a top view (b), a front view (c), a bottom view (d), and a side view (e) showing an antenna element. In 1st Embodiment, it is a graph which shows the measurement result of the VSWR characteristic (voltage standing wave ratio). In 1st Embodiment, it is a graph which shows the measurement result of radiation efficiency. It is a top view which shows 2nd Embodiment of the antenna device which concerns on this invention. In 2nd Embodiment, it is a reverse view which shows an antenna device.

  Hereinafter, a first 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 one side 2a of the substrate body 2 as a region where the ground surface GND is not formed, and portions other than the part in contact with the one side 2a are provided on the ground surface GND. It is formed in the antenna occupation area AOA in contact.

  The first element 3 is disposed in the vicinity of a portion of the ground plane GND facing the one side 2a, and extends in a direction along the one side 2a, and is provided with a first extending portion E1 provided with a feeding point FP. A base end is connected to one end of the first extending portion E1 and the second extending portion E2 extends in a direction toward the one side 2a, and a base end is connected to the tip of the second extending portion E2 and the one side 2a. A third extending portion E3 extending in a direction along the direction and away from the feeding point FP and having a tip connected to the adjacent ground plane GND via the first passive element P1, and a first extending A fourth extending portion E4 having a proximal end connected to the other end of the portion E1 and extending in a direction toward the one side 2a and having a distal end connected to the adjacent ground plane GND via the second passive element P2. doing.

The first extending portion E1 has a protruding portion E0 that protrudes from the middle toward the adjacent ground surface GND, and a feeding point FP is provided at the tip thereof. Note that the feeding point FP may be provided at the other end of the first extending portion E1.
The second element 4 has a base end connected to the middle of the first extending portion E1, a fifth extending portion E5 extending in the direction toward the one side 2a, and a base end at the tip of the fifth extending portion E5. Is connected and extends in the direction along the third extending portion E3 and toward the side away from the second passive element P2, and the base end is on one end side of the first extending portion E1. And a seventh extending portion E7 that is connected and extends toward the side along the third extending portion E3 and away from the feeding point FP.

A third passive element P3 is connected to the base end of the fifth extending portion E5. If the required antenna performance can be obtained by providing the seventh extending portion E7, the third passive element P3 can be deleted.
An antenna element AT of a dielectric antenna is connected to the third extending portion E3 in the middle thereof.
A fourth passive element P4 is connected to the second extending portion E2 on the base end side with respect to the antenna element AT. Note that the fourth passive element P4 is not necessary if sufficient antenna characteristics can be obtained with only the first passive element P1.

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 ends of the conductor pattern 122 are connected to opposite ends of the divided part of the third extending part E3 for mounting, so that the antenna element AT becomes a part of the third extending part E3.
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. 5, 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 stray capacitance Ca between the fourth extending portion E4 and the ground plane GND, the stray capacitance Cb between the fourth extending portion E4 and the fifth extending portion E5, The stray capacitance Cc between the fifth extending portion E5 and the second extending portion E2, the stray capacitance Cd between the third extending portion E3 and the antenna element AT and the sixth extending portion E6, and the third The stray capacitance Ce between the extending portion E3 and the antenna element AT and the seventh extending portion E7, the stray capacitance Cf between the first extending portion E1 and the ground plane GND, the seventh extending portion E7, A stray capacitance Cg between the ground plane GND and the ground plane GND can be generated.

  Next, each resonance frequency in the antenna device of the present embodiment will be described with reference to FIGS.

  In the antenna device 1 of the present embodiment, as shown in FIGS. 6 and 7, 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 can be set and adjusted by the first element 3 including the antenna element AT and the stray capacitances Ca, Cb, Cc, Cd, Ce, Cf, Cg.
Further, the impedance adjustment of the first resonance frequency f1 can be performed by setting each of the stray capacitances Ca, Cb, Cc, Cd, Ce, Cf, and Cg.
Furthermore, the final frequency adjustment can be flexibly performed by selecting the first passive element P1.
The final impedance adjustment can be flexibly performed by selecting the second passive element P2.
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, the first element 3, and the stray capacitances Ca, Cb, Cc, Cd, Ce, Cf, Cg.
The impedance adjustment of the second resonance frequency f2 can be performed by setting each of the stray capacitances Ca, Cb, Cc, Cd, Ce, Cf, Cg.
Furthermore, the final frequency adjustment can be flexibly performed by selecting the third passive element P3.
The final impedance adjustment can be flexibly performed by selecting the second passive element P2.
In this way, the second resonance frequency f2 is adjusted mainly at the portion of the two-dot chain line A2 in FIG.

In the antenna device 1 of the present embodiment, as shown in the schematic equivalent circuit of FIG. 4, loop-shaped current paths are formed around the periphery of the two openings.
That is, the loop-shaped current path that flows along the periphery of the opening between the first element 3 and the ground plane GND has an inductance component L (AT) of the antenna element AT and a capacitance C (P1) of the first passive element P1. The series resonance by is constituted.
In addition, the loop-shaped current path that flows along the periphery of the opening between the fourth extending portion E4 and the ground plane GND has an inductance component L (4) of the second element 4 itself and a capacitance C of the second passive element P2. The series resonance by (P2) and the parallel resonance by the inductance component L (4) of the second element 4 itself and the stray capacitance generated between the second element 4 and the surroundings are configured.

  As described above, in the antenna device 1 of the present embodiment, the first element 3 has the proximal end connected to the other end of the first extending portion E1 and extends in the direction toward the one side 2a, and the distal end is the second passive element. Since it has the 4th extension part E4 connected to the adjacent ground surface GND via P2, a high frequency current is passed through the 4th extension part E4 extended toward the one side 2a. Therefore, the bandwidth can be increased by increasing the impedance. That is, the stray capacitance generated between the fourth extending portion E4 and the other extending portion, the stray capacitance generated between the fourth extending portion E4 and the ground plane GND, and the fourth extending portion E4. The impedance is increased by its own inductance, and the bandwidth is increased at the resonance frequency.

  Further, the third extending portion E3 is connected to the adjacent ground plane GND via the first passive element P1, so that the first extending portion E1, the second extending portion E2, the third extending portion E3, A loop shape is formed with the inner edge of the ground surface GND. Further, the fourth extending portion E4 is connected to the adjacent ground surface GND via the second passive element P2, so that the first extending portion E1, the fourth extending portion E4, and the inner edge portion of the ground surface GND A loop shape is formed. As a result, the high-frequency current flows in the two loop shapes described above, thereby suppressing the two flows of the high-frequency current spreading from the third extending portion E3 and the fourth extending portion E4 to the ground plane GND, and the limited antenna occupation High antenna performance can be obtained by efficiently using the area AOA. In addition, it is possible to reduce the influence of peripheral components during mounting.

In addition, since the ground surface GND, the first element 3 and the second element 4 are formed on the surface of the substrate body 2 with a metal foil, the stray capacitance between the elements and between the ground surfaces GND is provided. Can be made to be double resonance.
In particular, since the second element 4 has a fifth extending portion E5 whose base end is connected in the middle of the first extending portion E1 and extends in the direction toward the one side 2a, the fifth extending portion. Since E5 extends between the second extending portion E2 and the fourth extending portion E4, the fifth extending portion E5 is provided between the fifth extending portion E5 and the second extending portion E2. And stray capacitances can be generated between the first extension portion E4 and the fourth extension portion E4.

In addition, the second element 4 has a base end connected to one end of the first extending portion E1, and extends in a direction along the third extending portion E3 and toward the side away from the feeding point FP. Since the portion E7 is included, stray capacitance is generated between the seventh extending portion E7 and the third extending portion E3 and between the seventh extending portion E7 and the ground plane GND, and further resonance occurs. The frequency and impedance can be adjusted.
Also, 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.

Furthermore, the antenna element AT, which is a loading element that does not self-resonate at the desired resonance frequency, enables shortening of the element length, high impedance, and increase of stray capacitance, facilitating adjustment of double resonance, and miniaturization. It is possible to improve the antenna characteristics.
In particular, since the antenna element AT of the dielectric antenna is connected to the third extending part E3, the antenna element AT and the first passive element P1 constitute a series resonance, and the above-mentioned via the third extending part E3. Since the high-frequency current efficiently flows in the loop shape, the flow of the high-frequency current spreading from the third extending portion E3 to the ground plane GND can be further suppressed.

  Next, a second embodiment of the antenna device according to the present invention will be described below with reference to FIGS. Note that, in the following description of the embodiment, the same components described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The difference between the second embodiment and the first embodiment is that, in the first embodiment, both the first element 3 and the second element 4 are formed in the antenna occupation area AOA provided on the surface of the substrate body 2. On the other hand, in the antenna device 21 of the second embodiment, as shown in FIGS. 7 and 8, as the antenna occupying region, the surface side area AOA1 disposed on the surface of the substrate body 2 and the back surface of the substrate body 2 And a rear surface area AOA2 facing the front surface area AOA1 is provided, the first element 3 is formed in the front surface area AOA1, and the second element 24 is formed in the rear surface area AOA2. It is.

  In the second embodiment, the first element 3 and the second element 24 are connected by a through hole H. The through hole H is provided by connecting the base end portion of the fifth extending portion E5 and the first extending portion E1 facing each other. The seventh extending portion E7 has a proximal end connected to the proximal end portion of the fifth extending portion E5 and is connected to one end side of the first extending portion E1 through the through hole H.

In the second embodiment, since the second element 24 is arranged on the back surface side, a space is created in the front surface side area AOA1, the third extending portion E3 is brought closer to the one side 2a, and the first element 3 and the ground plane GND. The opening area of the area surrounded by is expanded.
In addition, by arranging the second element 24 on the back surface side and widening the opening area of the region surrounded by the first element 3 and the ground plane GND, sufficient antenna performance can be obtained without the fourth passive element P4. Therefore, in the second embodiment, the fourth passive element P4 is omitted.

  Thus, in the antenna device 21 of the second embodiment, the second element 24 is formed in the back surface area AOA2, and the first element 3 and the second element 24 are connected by the through hole H. In the region AOA1, the opening area of the region surrounded by the first element 3 and the ground plane GND can be widened, and the bandwidth can be broadened at the first resonance frequency f1 obtained mainly by the first element 3. Become.

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

In these measurements, the following passive elements were used.
First passive element P1: 0.5 pF capacitor Second passive element P2: 4.5 pF capacitor Third passive element P3: 1.2 nH inductor Fourth passive element P4: Jumper wire (0Ω resistance wire)
The size of the antenna occupation area AOA was set to 8.0 mm × 5.0 mm. The evaluation substrate body size was set to 100.0 mm × 50.0 mm.

As can be seen from FIG. 6, the first and second resonance frequencies f1, f2 are obtained with good bandwidth. In particular, the first resonance frequency f1 has a wide bandwidth.
The first resonance frequency f1 was 2477.5 MHz, and the bandwidth was 275.7 MHz (VSWR ≦ 3.0). The second resonance frequency f2 was 5215.0 MHz, and the bandwidth was 180.3 MHz (VSWR ≦ 3.0).

FIG. 7 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 -1.6 dB at the first resonance frequency f1 and -4.2 dB at the second resonance frequency f2.

  The present invention is not limited to the above embodiments and examples, and various modifications can be made without departing from the spirit of the present invention.

For example, in each of the above-described embodiments, the antenna element is provided in the third extending portion. However, the antenna element may be provided in another extending portion to shorten the element, thereby reducing the size of the entire apparatus. Absent. For example, an antenna element may be provided in the sixth extending portion.
In addition, as described above, it is preferable to connect the antenna element to be a part of the element, but the third extending portion that is extended only by a metal foil such as a copper foil may be used without connecting the antenna element. . At this time, in order to increase the impedance, at least a part of the third extending part is formed into a narrow pattern narrower than the other parts, or a meander pattern extending in a certain 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 1,21 ... Antenna apparatus, 2 ... Board | substrate main body, 2a ... One side of board | substrate main body, 3 ... 1st element, 4,24 ... 2nd element, AOA ... Antenna occupation area | region, AOA1 ... Front side area | region, AOA2 ... Back side area | region , AT ... antenna element, E1 ... first extension, E2 ... second extension, E3 ... third extension, E4 ... fourth extension, E5 ... fifth extension, E6 ... sixth Extension part, E7 ... Seventh extension part, E8 ... Eighth extension part, FP ... Feeding point, GND ... Ground plane, H ... Through hole, P1 ... First passive element, P2 ... Second passive element, P3 ... 3rd passive element, P4 ... 4th passive element

Claims (7)

An insulating substrate body;
A ground surface and a first element patterned with metal foil on at least one of the front surface and the back surface of the substrate body,
The first element is provided in contact with one side of the substrate body as a region where the ground surface is not formed, and is formed in an antenna occupation region where the part other than the portion in contact with the one side is in contact with the ground surface. ,
A first extending portion that is arranged in the vicinity of a portion of the ground surface facing the one side and extends in a direction along the one side and is provided with a feeding point;
A second extension portion connected to one end of the first extension portion and extending in a direction toward the one side;
A proximal end is connected to the distal end of the second extending portion, and extends toward a direction along the one side and away from the feeding point, and the distal end is adjacent to the ground plane via the first passive element. A connected third extension;
A fourth extending portion having a proximal end connected to the other end of the first extending portion and extending in a direction toward the one side and having a distal end connected to the adjacent ground plane via a second passive element; An antenna device comprising the antenna device. The antenna device according to claim 1,
A second element patterned with a metal foil is provided on at least one of the front and back surfaces of the substrate body,
The second element is formed in the antenna occupation region;
An antenna device comprising: a fifth extending portion that is connected to a base end in the middle of the first extending portion and extends in a direction toward the one side. The antenna device according to claim 2, wherein
A sixth extension in which the second element has a base end connected to the tip of the fifth extension part and extends in a direction along the third extension part and away from the second passive element. An antenna device comprising a portion. In the antenna device according to claim 2 or 3,
A seventh extension part in which the base end is connected to one end side of the first extension part, and the second element extends in a direction along the third extension part and a side away from the feeding point. An antenna device comprising: In the antenna device according to any one of claims 2 to 4,
An antenna device, wherein a third passive element is connected to the fifth extending portion. In the antenna device according to any one of claims 2 to 5,
As the antenna occupying region, a surface side region disposed on the surface of the substrate body, and a back surface region disposed on the back surface of the substrate body and facing the surface side region are provided,
The first element is formed in the surface side region;
The second element is formed in the back side region;
The antenna device, wherein the first element and the second element are connected by a through hole. In the antenna device according to any one of claims 1 to 6,
An antenna device, wherein an antenna element of a dielectric antenna is connected to the third extending portion.