WO2020053935A1

WO2020053935A1 - Antenna device

Info

Publication number: WO2020053935A1
Application number: PCT/JP2018/033460
Authority: WO
Inventors: 準後藤; 丸山　貴史; 重雄宇田川; 深沢　徹
Original assignee: 三菱電機株式会社
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2020-03-19
Also published as: JPWO2020053935A1; JP6861901B2

Abstract

An antenna device (100) provided with a microstrip array antenna unit (9) having: a first radiating element group including a plurality of first radiating elements (3) arranged in a first direction; first power supply lines (4) electrically connected between mutually adjacent first radiating elements (3) in the first radiating element group; and a second power supply line (5) electrically connected to any of the first radiating elements (3) excluding the first radiating elements (3) disposed at both ends of the first radiating element group.

Description

Antenna device

The present invention relates to an antenna device.

Conventionally, an antenna device using a so-called “microstrip array antenna” has been developed (for example, see Patent Document 1).

JP 2016-225935 A

中央 In the central feeding array antenna (C) described in Patent Document 1, a central feeding portion (5) is provided between a pair of array antennas (A) (see FIG. 3 and the like in Patent Document 1). That is, the individual array antennas (A) are of the end feeding type, whereas the entire center feeding array antenna (C) is of the central feeding type.

中央 In the central feeding array antenna (C) described in Patent Document 1, so-called “blocking” occurs because the central feeding unit (5) is provided between the pair of array antennas (A). Due to this blocking, there is a problem that the radiation characteristics are reduced. Specifically, for example, there is a problem that the level of a so-called “side lobe” increases.

In the central feeding array antenna (C) described in Patent Document 1, a plurality of crank-shaped transmission lines for phase adjustment are provided in each array antenna (A) (see FIG. 1 and the like in Patent Document 1). ). Due to these crank-shaped transmission lines, there has been a problem that power supply loss increases.

The present invention has been made to solve the above-described problem, and has as its object to suppress occurrence of blocking and reduce power supply loss in an antenna device using a microstrip array antenna.

An antenna device according to the present invention is electrically connected between a first radiating element group including a plurality of first radiating elements arranged in a first direction and adjacent first radiating elements in the first radiating element group. And a second feed line electrically connected to any of the first radiating elements except for the first radiating elements disposed at both ends of the first radiating element group. It has a strip array antenna unit.

According to the present invention, since the configuration is as described above, in the antenna device using the microstrip array antenna, it is possible to suppress the occurrence of the blocking and reduce the feeding loss.

FIG. 3 is a plan view showing a main part of the antenna device according to the first embodiment. FIG. 3 is a plan view showing a main part of an antenna device for comparison with the antenna device according to the first embodiment. FIG. 5 is a plan view showing a main part of another antenna device for comparison with the antenna device according to the first embodiment. FIG. 9 is a plan view illustrating a main part of the antenna device according to the second embodiment. FIG. 14 is an explanatory diagram showing an electromagnetic field simulation result of a radiation pattern by the antenna device according to Embodiment 2. FIG. 13 is a plan view illustrating a main part of the antenna device according to the third embodiment. FIG. 14 is a plan view illustrating a main part of the antenna device according to the fourth embodiment. FIG. 14 is a plan view showing a main part of another antenna device according to Embodiment 4. FIG. 14 is a plan view showing a main part of another antenna device according to Embodiment 4.

Hereafter, in order to explain this invention in greater detail, the preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 is a plan view showing a main part of the antenna device according to the first embodiment. The antenna device 100 according to the first embodiment will be described with reference to FIG.

In the figure, reference numeral 1 denotes a dielectric substrate. A ground conductor pattern (not shown) is provided on the back surface of the dielectric substrate 1, and a pair of conductor patterns 2 are provided on the front surface of the dielectric substrate 1. One of the conductive traces 2 ₁ of the pair of the conductor pattern 2, N number of radiating elements (hereinafter referred to as "first radiation element".) Portion corresponding to the 3, M-number of the feed line (hereinafter, "first feed line 4) and a portion corresponding to another power supply line (hereinafter referred to as “second power supply line”) 5. Other conductor patterns 2 ₂ of the pair of the conductor pattern 2, N number of radiating elements (hereinafter "second radiating element" hereinafter.) Portions corresponding to 6, M number of feed lines (hereinafter "third feed line 7) and a portion corresponding to another power supply line (hereinafter, referred to as a “fourth power supply line”) 8. Thus, the microstrip array antenna section 9 is configured.

放射 Hereinafter, a radiating element group including the N first radiating elements 3 is referred to as a “first radiating element group”. A radiating element group formed by the N second radiating elements 6 is referred to as a “second radiating element group”.

Here, N is an arbitrary integer of 3 or more, and N = 5 in the example shown in FIG. That is, in the example shown in FIG. 1, a microstrip array antenna unit 9 has a first radiating element ₃ _{1-3 5} and five second radiating element ₆ _{1-6 5} five. Further, M is an integer of N−1, and M = 4 in the example shown in FIG. That is, in the example shown in FIG. 1, a microstrip array antenna unit 9 has a first feed line ₄ _{1-4 4} and four third feed line ₇ _{1-7 4} 4.

In the microstrip array antenna section 9, N first radiating elements 3 are arranged in a line, and N second radiating elements 6 are also arranged in a line. More specifically, the arrangement direction of the N first radiating elements 3 and the arrangement direction of the N second radiating elements 6 are the same as each other, and these radiating elements 3 and 6 are linear, that is, primary They are arranged in an original array. Hereinafter, the arrangement direction of these radiating elements 3 and 6 is referred to as a “first direction”. In the example shown in FIG. 1, each first radiating element 3 is rectangular, and each second radiating element 6 is also rectangular.

Ｘ The X axis in the figure is a virtual axis along the first direction. In the figure, the Y axis is a virtual axis along a direction orthogonal to the first direction and parallel to the plate surface of the dielectric substrate 1. In the figure, the Z axis is a virtual axis that is a direction orthogonal to the first direction and is orthogonal to the plate surface of the dielectric substrate 1. That is, the X axis, the Y axis, and the Z axis are orthogonal to each other.

Hereinafter, a virtual plane that is parallel to the X axis and the Z axis and passes through the center of each of the first radiating elements 3 and the center of each of the second radiating elements 6 is referred to as an “XZ plane”. A virtual plane that is parallel to the Y axis and the Z axis and passes through the center of the microstrip array antenna unit 9 (that is, passes through the center axis A) is referred to as “YZ plane”.

Each first feed line 4 is provided between each two adjacent first radiating elements 3 and is electrically connected to the two first radiating elements 3. In the example shown in FIG. 1, the first feed line _{4 1} is provided, the first feed line _{4 2} between the first radiating element ₃ 2, _{3 3} provided between the first radiating element ₃ 1, _{3 2} is and has first feed line _{4 3} is provided between the first radiating element ₃ 3, _{3 4,} the first feed line _{4 4} is provided between the first radiating element ₃ 4, _{3 5.} Each of the first power supply lines 4 is configured by a straight line along the first direction.

Each of the third feeder lines 7 is provided between two adjacent second radiating elements 6 and is electrically connected to the two second radiating elements 6. In the example shown in FIG. 1, a third feed line ₇₁ is provided on the second radiating element ₆ 1, ₆ between the _two, a third feed line _{7 2} provided between the second radiating element ₆ 2, _{6 3} is and has third feed line _{7 3} is provided between the second radiating element ₆ 3, _{6 4,} third feeding line _{7 4} is provided between the second radiating element ₆ 4, _{6 5.} Each of the third power supply lines 7 is configured by a linear line along the first direction.

One end of the second feed line 5 (hereinafter, referred to as “first end”) is one or more first radiations excluding the two first radiation elements 3 arranged at both ends in the first radiation element group. One of the elements 3 is electrically connected to the first radiating element 3. In the example shown in FIG. 1, one of the first first radiating element 3 ₁ 2 arranged on both ends in the radiation element _group, 3 of 3 except for the ₅ first radiating element 3 _2-3 ₄ the first end of the second feed line 5 is electrically connected to the number of first radiating element 3 _2.

The second power supply line 5 is configured by a straight line that extends in a direction orthogonal to the first direction and parallel to the plate surface of the dielectric substrate 1. That is, the second feeding line 5 extends from one first radiating element 3 (the first radiating element 3 _{2 in} the example shown in FIG. 1) to which the second feeding line 5 is connected in a direction along the Y axis. It has a given shape. In the example shown in FIG. 1, the extension direction of the second feed line 5 to the first radiating element 3 ₂ is -Y direction.

One end of the fourth feed line 8 (hereinafter, referred to as “first end”) is provided with one or more second radiations except for the two second radiation elements 6 arranged at both ends in the second radiation element group. Any one of the elements 6 is electrically connected to the second radiating element 6. In the example shown in FIG. 1, one of the second second radiation elements 6 ₁ of two disposed at opposite ends of the radiating element _group, 6 of three except the ₅ second radiating element 6 _2-6 ₄ the first end of the fourth feed line 8 is electrically connected to the number of second radiating element 6 _2.

The fourth power supply line 8 is configured by a straight line that extends in a direction orthogonal to the first direction and parallel to the plate surface of the dielectric substrate 1. That is, the fourth feed line 8, (in the example shown in FIG. 1 the second radiating element 6 ₂₎ fourth one second radiating element 6 is a target for connection of the feed line 8 extending in the direction along the Y axis from the It has a given shape. In the example shown in FIG. 1, the stretching direction of the fourth feed line 8 to the second radiating element 6 ₂ is -Y direction.

The other end of the second feed line 5 (hereinafter referred to as "second end".) It is electrically connected to the feeding portion 10 _1. Feeding unit 10 _1, when the antenna device 100 is used to transmit antenna, and supplies high-frequency power (more specifically, an electromagnetic wave) to the second end of the second feed line 5. Power supply to the second end of the second feed line 5 by the feeding unit 10 _1, for example, those using RF (Radio Frequency) connector.

The other end of the fourth feed line 8 (hereinafter referred to as "second end".) It is electrically connected to the feeding portion 10 _2. Feeding portion 10 _2, when the antenna device 100 is used for transmitting antennas (more specifically, an electromagnetic wave) high-frequency power to the second end of the fourth feed line 8 and supplies the. Feeding by the feeding unit 10 ₂ for the second end of the fourth feed line 8, for example, those using a RF connector.

In the example shown in FIG. 1, it has an axial symmetrical shape with each other and the conductor pattern 2 ₁ and the conductor pattern 2 _2. That, and five of the first radiating element ₃ _{1-3 5} and five second radiating elements ₆ 1 to _{6 5} are arranged in axial symmetry to each other and four first feed line ₄ 1 4 ₄ and 4 and the third feed line 7 _1-7 ₄ are arranged axially symmetrically to one another, and a second feed line 5 and the fourth feeding line 8 is disposed axially symmetrically. Sites second feed line 5 of the first radiating element 3 ₂ is connected (hereinafter referred to as "connecting portions".), The end of the first radiating element 3 ₂ in the + X side (the "right end".) Are located in In contrast, the site where the fourth feeding line 8 in the second radiating element 6 ₂ is connected (hereinafter referred to as "connecting portions".) Is, the -X side end of the second radiating element 6 ₂ (hereinafter " At the left end). A in the figure indicates the central axis of the axial symmetry.

要 The main part of the antenna device 100 is thus configured.

Next, the operation of the antenna device 100 will be described. More specifically, a description will be given focusing on an example in which the antenna device 100 operates as a traveling wave antenna when the antenna device 100 is used as a transmission antenna.

First, the power supply unit 10 ₁ supplies power to the second end of the second feed line 5. The supplied power can propagate in the + Y direction along the second feed line 5 is input to the first radiating element 3 _2. The portion of the power of the input power is radiated into space outside the antenna apparatus 100 by the first radiating element 3 ₂ as an electromagnetic wave. Further, another part of the power of the input power propagates in the + X direction along the first feed line 4 _1, space outside the antenna device 100 as an electromagnetic wave by the first radiating element 3 ₁ Is radiated. Further, another part of the power of the electric power the input is propagated in the -X direction along the first feed line 4 _2-4 _4, the electromagnetic wave by the first radiating element 3 _{3 to} 3 ₅ Is radiated to the space outside the antenna device 100.

Similarly, supplies power to the feeding portion 10 ₂ and the second end of the fourth feed line 8. The supplied power is fourth propagates in the + Y direction along the feeding line 8, is input to the second radiating element 6 _2. The portion of the power of the input power is radiated as a second electromagnetic wave by radiating element 6 ₂ in the space outside the antenna device 100. Also, the other part of the power that is the input power is propagated in the -X direction along the third feeding line _71, the antenna device 100 outside of the second electromagnetic wave by radiating element 6 ₁ Radiated into space. Further, another part of the power of the electric power the input is propagated to the third feeding line 7 _2-7 along the ₄ + X direction, as an electromagnetic wave by the second radiating element 6 _3-6 ₅ The radiation is radiated to a space outside the antenna device 100.

Here, each of the first radiating element 3 _2-3 _4, together with those which function to emit electromagnetic waves to space outside the antenna device 100, functions to supply electric power to the first radiating element 3 adjacent Things. In the first radiating element 3 _2-3 ₄ thereof, passing phase is known to vary depending on the radiation dose. Therefore, set by setting the length of each of the first feed line 4 _1-4 ₄ to an appropriate value, i.e. the distance between the two first radiating element 3 adjacent to each other to an appropriate value it is therefore possible to excite all of the first radiating element 3 _1-3 ₅ in phase with each other.

Similarly, each of the second radiating element 6 _2-6 _4, together with those which function to emit electromagnetic waves to space outside the antenna device 100, performs a function of supplying electric power to the second radiating element 6 adjacent Things. In the second radiating element 6 _2-6 ₄ thereof, passing phase is known to vary depending on the radiation dose. Therefore, set by setting the length of each of the third feed line 7 _1-7 ₄ to an appropriate value, i.e. the distance between the two second radiating elements 6 adjacent to each other to an appropriate value it is therefore possible to excite all of the second radiation element 6 _1-6 ₅ in phase with each other.

The field generated in the right end portion of the first radiating element 3 ₂ (i.e. + X side end) direction and the left end portion of the first radiating element 3 ₂ of the electric field generated by (or end of the -X side) It is known that the directions are opposite to each other. More specifically, it is known that when one electric field is in the + Z direction, the other electric field is in the −Z direction. Likewise, generated by the second right end of the radiating element 6 ₂ (i.e. + end of X side) direction and a second left end of the radiating element 6 ₂ of the electric field generated by (or end of the -X side) It is known that the directions of the electric fields are opposite to each other. More specifically, it is known that when one electric field is in the + Z direction, the other electric field is in the −Z direction.

As described above, in the example shown in FIG. 1, the connecting portion of the second feed line 5 of the first radiating element 3 ₂ is disposed at the right end portion of the first radiating element 3 _2, and the second radiating element 6 connection of the fourth power supply line 8 is disposed at the left end portion of the second radiating element 6 ₂ in _2. Therefore, by setting the opposite phase to the feeding and the feeding by the feeding unit 10 ₁ by the power supply unit 10 _2, i.e., by setting the phase difference between these power supply to 180 °, the first radiating element 3 _{it can} be ₂ to excite by the second radiating element 6 ₂ and the phase with one another.

Next, effects of the antenna device 100 will be described.

FIG. 2 shows an antenna device 100 ′ for comparison with the antenna device 100 of the first embodiment. As shown in FIG. 2, the dielectric substrate 1 'ground conductor pattern on the back surface portion (not shown) is provided, the dielectric substrate 1' a pair of conductor patterns 2 ₁ to the surface of ', 2 _2' provided Have been. One conductor pattern 2 ₁ ′ has a portion corresponding to the _five first radiating elements 3 ₁ ′ to 3 ₅ ′, a portion corresponding to the four first feeder lines 4 ₁ ′ to 4 ₄ ′, and the second It has a portion corresponding to the feed line 5 '. The other conductor pattern 2 ₂ ′ has a portion corresponding to _five second radiating elements 6 ₁ ′ to 6 ₅ ′, a portion corresponding to four third feeder lines 7 ₁ ′ to 7 ₄ ′, and a fourth portion. It has a portion corresponding to the feed line 8 '. A first radiating element group is composed of _five first radiating elements 3 ₁ ′ to 3 ₅ ′, and a second radiating element group is composed of five second radiating elements 6 ₁ ′ to 6 ₅ ′. I have. Thus, the microstrip array antenna section 9 'is configured. In the figure, A 'indicates an axially symmetric center axis of the microstrip array antenna section 9'.

Here, the first end of the second feed line 5 ′ is electrically connected to the first radiating element 3 ₁ ′, and the second end of the second feed line 5 ′ is electrically connected to the feed unit 10 ₁ ′. Connected. The first end of the fourth feed line 8 'is electrically connected to the second radiating element 6 ₁ ', and the second end of the fourth feed line 8 'is electrically connected to the feed unit 10 ₂ '. Have been. Each of the second power supply line 5 ′ and the fourth power supply line 8 ′ is configured by a linear line along the first direction. Thereby, the feeding units 10 ₁ ′ and 10 ₂ ′ are arranged between the first radiating element 3 ₁ ′ and the second radiating element 6 ₁ ′.

The power supply unit 10 ₁ ′ supplies high-frequency power (more specifically, electromagnetic waves) to the second end of the second power supply line 5 ′. The supplied power propagates in the −X direction along the second power supply line 5 ′, and is input to the first radiating element 3 ₁ ′. The portion of the power of the input power is radiated out of the space _'antenna device 100 as an electromagnetic wave by the' first radiating element 3 _1. Another part of the input power propagates in the −X direction along the first feed lines 4 ₁ ′ to 4 ₄ ′, and the first radiating elements 3 ₂ ′ to 3 _The electromagnetic wave is radiated to the space outside the antenna device 100 ′ by ₅ ′.

Feeding portion 10 2 _', fourth feeding line 8' and supplies the high-frequency power (more specifically, an electromagnetic wave) to the second end of the. The supplied power propagates in the + X direction along the fourth power supply line 8 ′ and is input to the second radiating element 6 ₁ ′. Part of the input power is radiated by the second radiating element 6 ₁ ′ as electromagnetic waves to the space outside the antenna device 100 ′. Another part of the input power propagates in the + X direction along the third power supply lines 7 ₁ ′ to 7 ₄ ′, and the second radiating elements 6 ₂ ′ to 6 ₅ And is radiated as electromagnetic waves to the space outside the antenna device 100 '.

That is, the first radiating element group in the antenna device 100 'is of the edge feeding type, and the second radiating element group of the antenna device 100' is also of the edge feeding type. On the other hand, the entire microstrip array antenna section 9 'is of the central feeding type.

Here, the actual power supply units 10 ₁ ′ and 10 ₂ ′ are structures having a physical size. Therefore, particularly in a high frequency band, the distance D2 (see FIG. 2) between the center of the first radiating element 3 ₁ ′ and the center of the second radiating element 6 ₁ ′ in the antenna apparatus 100 ′ is determined by It becomes larger than the distance between the first radiating element 3 _first center and the second center portion of the radiating element 6 ₁ D1 (see FIG. 1) in the. The antenna device 100 'has a problem that the radiation characteristics are deteriorated because blocking occurs due to the large interval D2. Specifically, for example, there is a problem that the side lobe level becomes large.

On the other hand, in the antenna device 100 of the first embodiment, the second feed line 5 is connected to one first radiating element 3 disposed inside the first radiating element group, and the one in the example shown in the feeding direction is non-parallel to the first direction (FIG. 1 for the first radiating element 3, the feeding direction with respect to the first radiating element 3 ₂ is the + Y direction, the feeding direction is a first direction Orthogonal to.). Further, the fourth feed line 8 is connected to one second radiating element 6 disposed inside the second radiating element group, and the feeding direction to the one second radiating element 6 is in the first direction. it is not parallel for (in the example shown in FIG. 1, the feeding direction with respect to the second radiating element 6 ₂ is the + Y direction, the feeding direction is orthogonal to the first direction.). Hereinafter, such a power supply method is referred to as a “side power supply method”.

By employing the lateral feeding system, as shown in FIG. 1, it is possible to prevent the power supply unit 10 _1, 10 ₂ is disposed in the first radiating element 3 ₁ and the second between radiating element _61. Thereby, the interval D1 can be made smaller than the interval D2, so that the occurrence of blocking can be suppressed. As a result, the radiation characteristics can be improved as compared with the antenna device 100 '. Specifically, for example, the side lobe level can be reduced.

Fig. 3 shows another antenna device 100 "for comparison with the antenna device 100 of the first embodiment. As shown in Fig. 3, a ground conductor pattern (not shown) is provided on the back surface of the dielectric substrate 1". A pair of conductor patterns 2 ₁ ″ and 2 ₂ ″ is provided on the surface of the dielectric substrate 1 ″. One conductor pattern 2 ₁ ″ has five first radiating elements 3 ₁ ″. To 3 ₅ ″, four first feed lines 4 ₁ ″ to 4 ₄ ″, and a portion corresponding to the second feed line 5 ″. The other conductor pattern 2 ₂ ″ is a portion corresponding to the _five second radiating elements 6 ₁ ″ to 6 ₅ ″, a portion corresponding to the four third feeding lines 7 ₁ ″ to 7 ₄ ″, and a fourth feeding line 8 ″ The first radiating element group includes _five first radiating elements 3 ₁ ″ to 3 ₅ ″. And a second radiating element group is constituted by the _five second radiating elements 6 ₁ ″ to 6 ₅ ″. In this manner, the microstrip array antenna section 9 ″ is formed. A ″ in the figure indicates an axially symmetric center axis of the microstrip array antenna unit 9 ″.

A first end of the second feed line 5 ″ is electrically connected to the first radiating element 3 ₁ ″, and a second end of the second feed line 5 ″ is electrically connected to the feed unit 10 ₁ ″. Have been. The power supply unit 10 ₁ ″ supplies high-frequency power (more specifically, electromagnetic waves) to the second end of the second power supply line 5 ″. The supplied power propagates along the second feed line 5 ″ and is input to the first radiating element 3 ₁ ″. Part of the input power is radiated to the space outside the antenna device 100 ″ as electromagnetic waves by the first radiating element 3 ₁ ″. Another part of the input power propagates in the -X direction along the first feed lines 4 ₁ ″ to 4 ₄ ″, and the first radiating elements 3 ₂ ″ to 3 ′ ₅ "radiates as electromagnetic waves to the space outside the antenna device 100".

The first end of the fourth feed line 8 "is electrically connected to the second radiating element 6 ₁ ", and the second end of the fourth feed line 8 "is electrically connected to the feed unit 10 ₂ ". Have been. The power supply unit 10 ₂ ″ supplies high-frequency power (more specifically, electromagnetic waves) to the second end of the fourth power supply line 8 ″. The supplied power propagates along the fourth power supply line 8 ″ and is input to the second radiating element 6 ₁ ″. Part of the input power is radiated by the second radiating element 6 ₁ ″ as electromagnetic waves to the space outside the antenna device 100 ″. Another part of the input power propagates in the + X direction along the third power supply lines 7 ₁ ″ to 7 ₄ ″, and the second radiating elements 6 ₂ ″ to 6 ₅ As a result, electromagnetic waves are radiated as electromagnetic waves into a space outside the antenna device 100 ''.

Here, in the antenna device 100 ″, each of the second feed line 5 ″ and the fourth feed line 8 ″ is constituted by a substantially crank-shaped line. That is, the second feed line 5 ″ and the fourth feed line 8 "has a plurality of bent portions, whereby the feeding portions 10 ₁ " and 10 ₂ "are arranged between the first radiating element 3 ₁ " and the second radiating element 6 ₁ ". Can be avoided, the distance D3 (see FIG. 3) between the center of the first radiating element 3 ₁ ″ and the center of the second radiating element 6 ₁ ″ is compared with the distance D2 (see FIG. 2). As a result, the occurrence of blocking can be suppressed.

However, in general, when a discontinuous portion (a bent portion, a branch portion, or the like) is provided in a microstrip line, unnecessary electromagnetic wave radiation is generated by the discontinuous portion, and it is known that power supply loss increases. ing. The antenna device 100 "has a problem in that the feed loss increases due to the plurality of bent portions provided on each of the second feed line 5" and the fourth feed line 8 ".

On the other hand, the antenna device 100 of the first embodiment employs the side feeding method as described above. Thus, by using the second power supply line 5 straight, the feeding portion 10 ₁ can be prevented from being disposed in the first radiating element 3 ₁ and the second between radiating element _61. Further, it is possible to use a fourth feed line 8 straight, to prevent the power supply unit 10 ₂ is disposed in the first radiating element 3 ₁ and the second between radiating element _61. As a result, it is possible to reduce the power supply loss as compared with the antenna device 100 ″ while suppressing the occurrence of the blocking.

The antenna device 100 may operate as a standing wave antenna.

アンテナ The antenna device 100 may be used for a receiving antenna.

Further, the connection portion of the second feed line 5 in one first radiating element 3 (the first radiating element 3 ₂ in the example shown in FIG. 1) to which the second feed line 5 is connected is the one first radiating element 3. One of the second radiating elements 6 (in the example shown in FIG. 1, the second radiating element 6 ₂ ) which is arranged at the right end of the one radiating element 3 and to which the fourth feed line 8 is connected. The connection part of the four feed lines 8 may be arranged at the right end of the one second radiating element 6. Alternatively, the connection part of the second feed line 5 in the one first radiating element 3 is disposed at the left end of the one first radiating element 3 and the one second radiating element 6 May be arranged at the left end of the one second radiating element 6. In this case, by setting the phase with each other and a power supply and the power supply by the power supply unit 10 ₁ by the power supply unit 10 _2, i.e., by setting the phase difference between these power supply to 0 °, the first one the of The radiating element 3 and the one second radiating element 6 can be excited in the same phase.

The antenna device 100 may have a ground conductor plate instead of the ground conductor pattern, and may have a pair of conductor plates instead of the pair of conductor patterns 2. One of the conductive plates of the pair of conductor plates are those having the same shape as the conductor pattern 2 _1, other conductor plate of the pair of conductor plates are those having the same shape as the conductor pattern 2 ₂ is there. In this case, a spacer may be provided between the ground conductor plate and the pair of conductor plates instead of the dielectric substrate 1.

形状 Also, the shape of each first radiating element 3 is not limited to a rectangular shape. Each first radiating element 3 may have, for example, an elliptical shape or a polygonal shape. Similarly, the shape of each second radiating element 6 is not limited to a rectangular shape. Each of the second radiating elements 6 may have, for example, an elliptical shape or a polygonal shape.

In addition, each of the first radiating elements 3 is provided with a pair of notches, and each of the second radiating elements 6 is provided with a pair of notches. It may operate as an antenna. Alternatively, the antenna device 100 may operate as a circularly polarized antenna because the polarizer is arranged to face the surface of the dielectric substrate 1.

In addition, the phases of the excitation in the N first radiating elements 3 (that is, the phases of the power supply to the N first radiating elements 3) can be individually set freely, and the excitation in the N second radiating elements 6 can be set. The phase (that is, the phase of power supply to the N second radiating elements 6) may be individually settable. Thereby, the antenna device 100 may operate as a so-called “phased array antenna”.

As described above, the antenna device 100 according to the first embodiment includes the first radiating element group including the plurality of first radiating elements 3 arranged in the first direction and the first radiating element group adjacent to each other in the first radiating element group. The first feeder line 4 electrically connected between the radiating elements 3 and one of the first radiating elements 3 except for the first radiating elements 3 arranged at both ends of the first radiating element group are electrically connected. And a second feed line 5 connected to the microstrip array antenna unit 9. This makes it possible to realize a side power feeding system. Therefore, when the microstrip array antenna unit 9 has another radiating element group similar to the first radiating element group (that is, the second radiating element group), the distance between the first radiating element group and the second radiating element group is increased. The arrangement of the

power supply units

10 ₁ and 10 ₂ can be avoided. As a result, the occurrence of blocking can be suppressed. Further, at this time, a discontinuous portion in the feed line between the first radiating elements 3 adjacent to each other (that is, the first feed line 4) can be unnecessary, and the power supply between the second radiating elements 6 adjacent to each other can be eliminated. line (i.e., third feeding line 7) that the course of the discontinuity can be eliminated in, not in the feed line between the power supply portion 10 ₁ and the first radiating element 3 (i.e. the second feed line 5) the continuous portion can be eliminated, and a discontinuous portion and the feeding portion 10 ₂ in the feed line between the second radiating element 6 (i.e. the fourth feeding line 8) can be eliminated. As a result, power supply loss can be reduced. Further, at this time, the operating gain of the antenna device 100 can be increased by improving the radiation characteristics and reducing the feed loss. As a result, it is possible to efficiently radiate electromagnetic waves in the so-called “broadside direction”.

Further, the microstrip array antenna unit 9 is provided between a second radiating element group including a plurality of second radiating elements 6 arranged in the first direction and the second radiating elements 6 adjacent to each other in the second radiating element group. The third power supply line 7 electrically connected to the second radiating element 6 except for the second radiating elements 6 arranged at both ends of the second radiating element group. A plurality of first radiating elements 3 and a plurality of second radiating elements 6 are arranged in a one-dimensional array in the microstrip array antenna section 9. Thereby, as shown in FIG. 1, a so-called “linear array antenna” can be realized.

Further, in the microstrip array antenna section 9, the plurality of first radiating elements 3 and the plurality of second radiating elements 6 are arranged axially symmetric with each other, and the plurality of first feeding lines 4 and the plurality of The third power supply lines 7 are arranged axially symmetrically with each other, and the second power supply line 5 and the fourth power supply line 8 are axially symmetrically arranged with each other. Thereby, the shape of the radiation pattern by the antenna device 100 can be made substantially axially symmetric. In particular, the shape of the radiation pattern on the XZ plane can be made substantially axially symmetric.

{Circle around (1)} Each of the first power supply lines 4 is configured by a linear line along the first direction, and each of the third power supply lines 7 is configured by a linear line along the first direction. Since these feeder lines are linear, it is possible to avoid generation of unnecessary radiation of electromagnetic waves due to discontinuous portions.

Further, the second power supply line 5 is configured by a linear line along the direction orthogonal to the first direction, and the fourth power supply line 8 is configured by a linear line along the direction orthogonal to the first direction. I have. Since these feeder lines are linear, it is possible to avoid generation of unnecessary radiation of electromagnetic waves due to discontinuous portions.

Note that the meaning of the term “axial symmetry” described in the claims of the present application is not limited to a completely axially symmetric mode, but includes a substantially axially symmetric mode. Further, the meaning of the term “linear” described in the claims of the present application is not limited to a completely linear mode, but includes a substantially linear mode. Further, the meaning of the term "orthogonal direction" described in the claims of the present application is not limited to a perfect orthogonal direction, but encompasses a substantially orthogonal direction.

Embodiment 2 FIG.
FIG. 4 is a plan view showing a main part of the antenna device according to the second embodiment. An antenna device 100a according to the second embodiment will be described with reference to FIG. In FIG. 4, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 4, the first radiating element 3 _1, has a recess 21 ₁ pair of notch-like arranged on both sides with respect to the first feed line 4 ₁ in the first feed line 4 _first connecting portion I have. First radiating element 3 ₂ has a recess 21 ₂ a pair of notch-like arranged on both sides with respect to the first feed line 4 ₁ in the first feed line 4 _first connection portion. First radiating element 3 ₂ includes a first feed line 4 ₂ of the first feed line 4 _second recess 21 ₃ pair of notch-like arranged on both sides with respect to the connecting portion. First radiating element 3 ₃ includes a first feed line 4 ₂ of the first feed line 4 ₂ pair of notch-like recesses 21 ₄ arranged on opposite sides with respect to the connecting portion. First radiating element 3 ₃ has a recess 21 ₅ pair of notch-like arranged on both sides with respect to the first feed line 4 ₃ at the connecting portion of the first feed line 4 _3. First radiating element 3 ₄ has a first feed line 4 first feed line 4 ₃ recesses 21 ₆ pair of notch-like arranged on both sides for the connection of _3. First radiating element 3 ₄ has a first feed line 4 ₄ of the first feed line 4 a pair of notch-like recesses 21 ₇ disposed on opposite sides with respect to ₄ at a connection. First radiating element ₃₅ has a first feed line 4 ₄ of the first feed line 4 a pair of notch-like recesses 21 ₈ arranged on opposite sides with respect to ₄ at a connection.

Similarly, the second radiating element ₆₁ has a third feed line ₇₁ of the recess 22 ₁ a pair of notch-like arranged on opposite sides with respect to the third feed line ₇₁ at the connection portion. The second radiating element 6 ₂ comprises a third feed line ₇₁ of the pair of notch-like recesses 22 ₂ disposed on opposite sides with respect to the third feed line ₇₁ at the connection portion. The second radiating element 6 ₂ comprises a third feed line 7 at the _second connection portion third feeding line 7 ₂ recesses 22 ₃ pair of notch-like arranged on both sides against. The second radiating element 6 ₃ has a third feed line 7 ₂ of the third feeding line 7 ₂ pair of notch-like recesses 22 ₄ arranged on opposite sides with respect to the connecting portion. The second radiating element 6 ₃ has a third feed line 7 third feed line 7 recesses 22 ₅ of the pair of notched arranged on opposite sides with respect to ₃ at a connection of the _3. The second radiating element 6 ₄ has a third feed line 7 third feed line 7 recesses 22 ₆ of the pair of notched arranged on opposite sides with respect to ₃ at a connection of the _3. The second radiating element 6 ₄ has a third feed line 7 ₄ third feed line 7 pair of notch-like recesses 22 ₇ disposed on opposite sides with respect to ₄ at a connection. The second radiating element 6 _5, and a third feed line 7 ₄ third feed line 7 pair of notch-like recesses 22 ₈ arranged on opposite sides with respect to ₄ at a connection.

That is, the notch-shaped concave portion 21 is formed at the connection portion of the first feed line 4 in each of the first radiating elements 3. In addition, a notch-shaped concave portion 22 is formed at a connection portion of the third feed line 7 in each of the second radiation elements 6.

マイクロ The microstrip array antenna 9a is thus configured.

Next, the operation of the antenna device 100a will be described. More specifically, a description will be given focusing on an example in which the antenna device 100a operates as a traveling wave antenna when the antenna device 100a is used as a transmission antenna.

First, the power supply unit 10 ₁ supplies power to the second end of the second feed line 5. The supplied power can propagate in the + Y direction along the second feed line 5 is input to the first radiating element 3 _2. The portion of the power of the input power is radiated into space outside the antenna device 100a by the first radiating element 3 ₂ as an electromagnetic wave. Also, the other part of the power of the input power propagates in the + X direction along the first feed line 4 _1, space outside the antenna device 100a as a first electromagnetic wave by radiating element 3 ₁ Is radiated. Further, another part of the power of the electric power the input is propagated in the -X direction along the first feed line 4 _2-4 _4, the electromagnetic wave by the first radiating element 3 _{3 to} 3 ₅ Is radiated to the space outside the antenna device 100a.

Similarly, supplies power to the feeding portion 10 ₂ and the second end of the fourth feed line 8. The supplied power is fourth propagates in the + Y direction along the feeding line 8, is input to the second radiating element 6 _2. The portion of the power of the input power is radiated into space outside the antenna device 100a as the second electromagnetic wave by radiating element 6 _2. Also, the other part of the power that is the input power is propagated in the -X direction along the third feeding line _71, outside the antenna device 100a as the second electromagnetic wave by radiating element 6 ₁ Radiated into space. Further, another part of the power of the electric power the input is propagated to the third feeding line 7 _2-7 along the ₄ + X direction, as an electromagnetic wave by the second radiating element 6 _3-6 ₅ It is radiated to the space outside the antenna device 100a.

Here, assuming the case where the concave portion 21 to each of the first radiation element 3 is not formed, a portion of the power to be radiated to the space outside the antenna device 100a as a first electromagnetic wave by radiating element 3 ₁ is first radiation without being radiated to the space outside the antenna device 100a as an electromagnetic wave by the element 3 _1, it may be reflected by the first radiating element 3 _1. Some of the power of the reflected power, the first feed line 4 _1, and the first radiating element 3 ₂ and a second feed line 5 is sequentially passed, return to the feeding section 10 ₁ (i.e., so-called " A reflected wave is generated.) Further, another part of the power of the reflected power, the first feed line 4 _1, the first radiating element 3 ₂ and the first feed line 4 ₂ sequentially passes through the first radiating element 3 ₃ is radiated to the space outside the antenna device 100a as an electromagnetic wave by 1-3 ₅ (i.e., the so-called "unnecessary radiation wave" occurs.).

Further, if the case where the concave portion 21 to each of the first radiation element 3 is not formed, a portion of the power to be radiated to the space outside the antenna device 100a by the first radiating element 3 _{3 to} 3 ₅ as an electromagnetic wave is, the without being radiated to the space outside the antenna device 100a as the electromagnetic wave by the first radiating element ₃ 3 to _{3 5,} it may be reflected by the first radiating element ₃ 3 to _{3 5.} Some of the power of the reflected power, the first power supply line 4 _2, and the first radiating element 3 ₂ and a second feed line 5 is sequentially passed, return to the feeding section 10 ₁ (i.e., the reflected wave Occurs.) Further, another part of the power of the reflected power, the first power supply line 4 _2, and the first radiating element 3 ₂ and the first feed line 4 ₁ sequentially passes through the first radiating element 3 ₁ As a result, it is radiated as electromagnetic waves to the space outside the antenna device 100a (that is, unnecessary radiation waves are generated).

On the other hand, the formation of the concave portion 21 in each of the first radiating elements 3 makes it possible to suppress the generation of reflected waves and unnecessary radiation waves in the first radiating element group. As a result, the power supply loss can be further reduced, and the radiation characteristics can be further improved.

Similarly, if the case where the concave portion 22 to the respective second radiating element 6 is not formed, a portion of the power to be radiated to the space outside the antenna device 100a as the second electromagnetic wave by radiating element ₆₁ is a second radiation without being radiated to the space outside the antenna device 100a as an electromagnetic wave by an element 6 _1, which may be reflected by the second radiating element _61. Some of the power of the reflected power, the third feed line _71, and a second radiating element 6 _second and fourth feed lines 8 sequentially passes through, back to the feeding portion 10 ₂ (i.e., the reflected wave Occurs.) Further, another part of the power of the reflected power, the third feed line _71, a second radiating element 6, _second and third feed line 7 ₂ sequentially passes through the second radiating element 6 ₃ is radiated to the space outside the antenna device 100a as an electromagnetic wave by 1-6 ₅ (i.e., unnecessary radiation wave is generated.).

Further, if the case where the concave portion 22 to the respective second radiating element 6 is not formed, a portion of the power to be radiated to the space outside the antenna device 100a by the second radiating element 6 _3-6 ₅ as an electromagnetic wave is, the the second radiation element ₆ _{3-6 5} without being radiated to the space outside the antenna device 100a as an electromagnetic wave, may be reflected by the second radiating element ₆ _{3-6 5.} Some of the power of the reflected power, the third feed line 7 _2, and the second radiating element 6 _second and fourth feed lines 8 sequentially passes through, back to the feeding portion 10 ₂ (i.e., the reflected wave Occurs.) Further, another part of the power of the reflected power, the third feed line 7 _2, the second radiation element 6, _second and third successively passes through the feed line _71, the second radiating element 6 ₁ As a result, electromagnetic waves are radiated to the space outside the antenna device 100a (that is, unnecessary radiation waves are generated).

On the other hand, the formation of the concave portion 22 in each of the second radiating elements 6 can suppress the generation of reflected waves and unnecessary radiation waves in the second radiating element group. As a result, the power supply loss can be further reduced, and the radiation characteristics can be further improved.

Next, the effects of the antenna device 100a will be described.

FIG. 5 shows an electromagnetic field simulation result of a radiation pattern by the antenna device 100a. In the figure, I corresponds to the main polarization in the XZ plane, and II in the figure corresponds to the main polarization in the YZ plane. Also, θ = 0 ° in FIG. 5 corresponds to the + Z direction in FIG. As shown in FIG. 5, the radiation pattern by the antenna device 100a has directivity in the broadside direction and has a low sidelobe level. By using the antenna device 100a of the side feeding system, such a good radiation pattern can be obtained.

Note that the antenna device 100a can employ various modifications similar to those described in Embodiment 1, that is, various modifications similar to the antenna device 100.

As described above, in the antenna device 100a of the second embodiment, the notch-shaped concave portion 21 is formed at the connection portion of the first feed line 4 in each of the first radiating elements 3, and the individual second radiating element 6, a notch-shaped concave portion 22 is formed at a connection portion of the third power supply line 7. Thereby, generation of reflected waves and unnecessary radiation waves in each radiation element group can be suppressed. As a result, the power supply loss can be further reduced, and the radiation characteristics can be further improved.

Embodiment 3 FIG.
FIG. 6 is a plan view showing a main part of the antenna device according to the third embodiment. Third Embodiment An antenna device 100b according to a third embodiment will be described with reference to FIG. In FIG. 6, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

導波 As shown in FIG. 6, a waveguide 31 is provided on the back surface of the dielectric substrate 1. In the example shown in FIG. 6, the waveguide 31 is constituted by a rectangular waveguide. The waveguide 31 is provided so that its tube axis is orthogonal to the plate surface of the dielectric substrate 1.

(4) A rectangular through-hole (hereinafter referred to as a “coupling hole”) 32 is formed at a position corresponding to the center of the waveguide 31 in the ground conductor pattern. A rectangular conductor pattern 33 is provided at a position corresponding to the center of the waveguide 31 on the surface of the dielectric substrate 1. The waveguide 31, the coupling hole 32, and the conductor pattern 33 form a power supply unit 10 b.

Conductor pattern 2 ₁ has a portion corresponding to the second feed line provided between the end portion (hereinafter referred to as "fifth feed line".) 34 of the power supply portion 10b and the second feed line 5 . That is, one end (hereinafter, referred to as “first end”) of the fifth power supply line 34 is electrically connected to the second end of the second power supply line 5, and the other end of the fifth power supply line 34. (Hereinafter, referred to as “second end”) is electrically connected to the waveguide 31 via the conductor pattern 33 and the coupling hole 32. The fifth power supply line 34 is configured by a linear line along the first direction.

Conductor patterns 2 ₂ has a portion corresponding to the feeding part 10b and the fourth feeder feeding line provided between the second end of the line 8 (hereinafter referred to as "sixth feed line".) 35 . That is, one end (hereinafter, referred to as “first end”) of the sixth power supply line 35 is electrically connected to the second end of the fourth power supply line 8, and the other end of the sixth power supply line 35. (Hereinafter, referred to as “second end”) is electrically connected to the waveguide 31 via the conductor pattern 33 and the coupling hole 32. The sixth power supply line 35 is configured by a linear line along the first direction.

マイクロ The microstrip array antenna 9b is thus configured.

In the example shown in FIG. 6, the power supply unit 10b is disposed on the central axis A. Thus, in the microstrip array antenna section 9b, the fifth feed line 34 and the sixth feed line 35 are arranged axially symmetric with each other. That is, the conductor pattern 2 ₁ and the conductor pattern 2 ₂ has an axial symmetrical shape.

The conductor pattern 33 is provided for impedance matching between the waveguide 31 and the coupling hole 32 and the fifth power supply line 34 and the sixth power supply line 35. The coupling between the waveguide 31 and the fifth power supply line 34 and the sixth power supply line 35 is determined by the size of the coupling hole 32 (more specifically, the size in the direction along the X axis and the size in the direction along the Y axis). The amount can be adjusted. The dimension of the conductor pattern 33 (more specifically, the dimension in the direction along the X-axis and the dimension in the direction along the Y-axis) causes the gap between the waveguide 31 and the fifth feed line 34 and the sixth feed line 35. Can be adjusted.

Next, the operation of the antenna device 100b will be described. More specifically, description will be made focusing on an example in which the antenna device 100b operates as a traveling wave antenna when the antenna device 100b is used as a transmission antenna.

First, the power supply unit 10b supplies high-frequency power (more specifically, electromagnetic waves) to the second end of the fifth power supply line 34. The supplied power is propagated along the fifth feed line 34 and a second feed line 5 is input to the first radiating element 3 _2. The behavior of the input power is the same as that described in the first embodiment, and a description thereof will not be repeated.

Further, the power supply unit 10b supplies high-frequency power (more specifically, electromagnetic waves) to the second end of the sixth power supply line 35. The supplied power is propagated along the sixth feed line 35 and the fourth feeding line 8, is input to the second radiating element 6 _2. The behavior of the input power is the same as that described in the first embodiment, and a description thereof will not be repeated.

Note that the antenna device 100b can employ various modifications similar to those described in Embodiment 1, that is, various modifications similar to the antenna device 100.

{Circle around (1)} The individual first radiating elements 3 in the antenna device 100b may have the same concave portions 21 as the individual first radiating elements 3 in the antenna device 100a. Each of the second radiating elements 6 in the antenna device 100b may have the same concave portion 22 as each of the second radiating elements 6 in the antenna device 100a.

形状 Also, the shape of the coupling hole 32 is not limited to a rectangular shape. The coupling hole 32 may have, for example, an elliptical shape or a polygonal shape.

(4) When a gap is formed between the back surface of the dielectric substrate 1 and the waveguide 31, a leakage current is generated. In this case, the waveguide 31 may have a so-called “choke structure”. Thereby, the leakage current can be cut off.

As described above, the antenna device 100b of the third embodiment includes the feeder 10b using the waveguide 31, and the microstrip array antenna 9b is electrically connected between the second feeder line 5 and the feeder 10b. It has a fifth power supply line 34 connected thereto, and a sixth power supply line 35 electrically connected between the fourth power supply line 8 and the power supply unit 10b. Thereby, similarly to the antenna device 100 of the first embodiment, the side feeding method can be realized. As a result, the occurrence of blocking can be suppressed, and the power supply loss can be reduced.

{Circle around (5)} The fifth power supply line 34 is configured by a linear line along the first direction, and the sixth power supply line 35 is configured by a linear line along the first direction. Since these feed lines are linear, the number of bent portions in the feed lines between the feed unit 10b and the first radiating element 3 (that is, the second feed line 5 and the fifth feed line 34) is reduced to one. In addition, the number of bent portions in the feed line between the feed unit 10b and the second radiating element 6 (that is, the fourth feed line 8 and the sixth feed line 35) can be reduced to one. As a result, generation of unnecessary electromagnetic wave radiation due to the discontinuous portion can be suppressed as compared with the antenna device 100 ″.

Embodiment 4 FIG.
FIG. 7 is a plan view showing a main part of the antenna device according to the fourth embodiment. FIG. 8 is a plan view showing a main part of another antenna device according to the fourth embodiment. FIG. 9 is a plan view showing a main part of another antenna device according to the fourth embodiment. Fourth Embodiment An

antenna device

100c, 100d, or 100e according to a fourth embodiment will be described with reference to FIGS.

As shown in FIG. 7, an antenna device 100c according to the fourth embodiment has a plurality of microstrip array antenna units 9 arranged in a direction different from the first direction (hereinafter, referred to as a "second direction"). . Each microstrip array antenna section 9 is the same as that described in the first embodiment. In the plurality of microstrip array antenna sections 9, a plurality of first radiating elements 3 and a plurality of second radiating elements 6 are arranged in a plane, that is, in a two-dimensional array. In the example shown in FIG. 7, the second direction is set to a direction along the Y axis, that is, a direction orthogonal to the first direction. In FIG. 7, reference numerals of respective portions in the individual conductor patterns 2 are not shown.

Alternatively, as shown in FIG. 8, the antenna device 100d according to the fourth embodiment has a plurality of microstrip array antenna units 9a arranged in the second direction. Each microstrip array antenna section 9a is the same as that described in the second embodiment. In the plurality of microstrip array antenna sections 9a, a plurality of first radiating elements 3 and a plurality of second radiating elements 6 are arranged in a plane, that is, in a two-dimensional array. In the example shown in FIG. 8, the second direction is set to a direction along the Y axis, that is, a direction orthogonal to the first direction. In FIG. 8, the reference numerals of the respective portions, the reference numerals of the individual concave portions 21, and the reference numerals of the individual concave portions 22 in the individual conductor patterns 2 are omitted.

Or, as shown in FIG. 9, the antenna device 100e according to the fourth embodiment has a plurality of microstrip array antenna units 9b arranged in the second direction. Each microstrip array antenna section 9b is the same as that described in the third embodiment. In the plurality of microstrip array antenna sections 9b, a plurality of first radiating elements 3 and a plurality of second radiating elements 6 are arranged in a plane, that is, in a two-dimensional array. In the example shown in FIG. 9, the second direction is set to a direction along the Y axis, that is, a direction orthogonal to the first direction. In FIG. 9, the reference numerals of the respective portions in the individual conductor patterns 2 and the reference numerals of the respective portions in the individual power supply portions 10b are omitted.

The second direction is not limited to a direction orthogonal to the first direction. The second direction may be a direction oblique to the first direction.

The individual microstrip array antenna units 9 in the antenna device 100c can employ various modifications similar to those described in the first embodiment.

The individual microstrip array antenna sections 9a in the antenna device 100d can employ various modifications similar to those described in the second embodiment.

The individual microstrip array antenna portions 9b in the antenna device 100e can employ various modifications similar to those described in the third embodiment. For example, in the antenna device 100e, each of the first radiating elements 3 may have the concave portion 21 and each of the second radiating elements 6 may have the concave portion 22.

給電 Various modifications similar to those described in the third embodiment can be employed for the individual power supply units 10b in the antenna device 100e.

As described above, the antenna device 100c according to the fourth embodiment includes the plurality of microstrip array antenna units 9 arranged in the second direction different from the first direction. A plurality of first radiating elements 3 and a plurality of second radiating elements 6 are arranged in a two-dimensional array. As a result, a so-called “planar array antenna” can be realized as shown in FIG.

The antenna device 100d according to the fourth embodiment includes a plurality of microstrip array antennas 9a arranged in a second direction different from the first direction. The first radiating element 3 and the plurality of second radiating elements 6 are arranged in a two-dimensional array. As a result, as shown in FIG. 8, a planar array antenna can be realized.

Further, the antenna device 100e according to the fourth embodiment includes a plurality of microstrip array antenna units 9b arranged in a second direction different from the first direction. The first radiating element 3 and the plurality of second radiating elements 6 are arranged in a two-dimensional array. As a result, as shown in FIG. 9, a planar array antenna can be realized.

In the present invention, any combination of the embodiments, a modification of an arbitrary component of each embodiment, or an omission of an arbitrary component in each embodiment is possible within the scope of the invention. .

アンテナ The antenna device of the present invention can be used for, for example, a radar device.

1 dielectric substrate, 2 conductor pattern, 3 radiation element (first radiation element), 4 radiation line (first radiation line), 5 radiation line (second radiation line), 6 radiation element (second radiation element), 7 Feed line (third feed line), 8 ° feed line (fourth feed line), 9, 9a, 9b microstrip array antenna section, 10, 10b feed section, 21 concave section, 22 concave section, 31 waveguide, 32 coupling hole , 33 ° conductor pattern, 34 ° feed line (fifth feed line), 35 ° feed line (sixth feed line), 100, 100a, 100b, 100c, 100d, 100e antenna device.

Claims

A first radiating element group including a plurality of first radiating elements arranged in a first direction, and a first feed line electrically connected between the adjacent first radiating elements in the first radiating element group And a second feed line electrically connected to any of the first radiating elements except for the first radiating elements disposed at both ends of the first radiating element group. An antenna device including an antenna unit.
The microstrip array antenna unit is configured to electrically connect a second radiating element group including a plurality of second radiating elements arranged in the first direction and a second radiating element adjacent to each other in the second radiating element group. And a fourth feed line electrically connected to any of the second radiating elements except for the second radiating elements disposed at both ends of the second radiating element group. And a feed line,
The antenna device according to claim 1, wherein a plurality of the first radiating elements and a plurality of the second radiating elements are arranged in a one-dimensional array in the microstrip array antenna unit.
In the microstrip array antenna section, a plurality of the first radiating elements and a plurality of the second radiating elements are arranged axially symmetric with each other, and a plurality of the first feed lines and a plurality of the first feed lines are arranged. 3. The antenna according to claim 2, wherein the third power supply line and the fourth power supply line are disposed axially symmetrically with respect to each other, and the second power supply line and the fourth power supply line are disposed axially symmetrically with each other. 4. apparatus.
A power supply unit using a waveguide is provided,
The microstrip array antenna unit includes a fifth feed line electrically connected between the second feed line and the feed unit, and a sixth feed line electrically connected between the fourth feed line and the feed unit. The antenna device according to claim 2, further comprising: a feed line.
Each of the first power supply lines is configured by a linear line along the first direction,
The antenna device according to claim 2, wherein each of the third feeder lines is configured by a straight line along the first direction.
The second power supply line is configured by a straight line along a direction orthogonal to the first direction,
The antenna device according to claim 2, wherein the fourth feed line is configured by a straight line extending along a direction orthogonal to the first direction.
The fifth power supply line is configured by a linear line along the first direction,
The antenna device according to claim 4, wherein the sixth feed line is configured by a linear line along the first direction.
A notch-like concave portion is formed at a connection portion of the first feed line in each of the first radiation elements;
The antenna device according to claim 2, wherein a notch-shaped concave portion is formed at a connection portion of each of the second radiating elements to the third feed line.
A plurality of the microstrip array antenna units arranged in a second direction different from the first direction;
9. The plurality of microstrip array antenna sections, wherein a plurality of the first radiating elements and a plurality of the second radiating elements are arranged in a two-dimensional array. The antenna device according to claim 1.