WO2024043241A1

WO2024043241A1 - Antenna module

Info

Publication number: WO2024043241A1
Application number: PCT/JP2023/030196
Authority: WO
Inventors: 雄大内田; 俊洋岩田; 友貴大森
Original assignee: 原田工業株式会社
Priority date: 2022-08-22
Filing date: 2023-08-22
Publication date: 2024-02-29

Abstract

An antenna module (1) according to the present invention comprises: a circuit board (30) that is a conductive member; an antenna element (10) that is disposed on the circuit board (30); and a holder (20) that is disposed between the circuit board (30) and the antenna element (10). The antenna element (10) has a top plate (11), an electrostatic capacitance part (12) that forms electrostatic capacitance with the circuit board (30), and a connection part (13) that connects the top plate (11) and the electrostatic capacitance part (12). The holder (20) has a base part (21) that is disposed between the electrostatic capacitance part (12) and the circuit board (30). When the holder (20) is rotated, the circuit board (30) and the antenna element (10) are fixed with the base part (21) therebetween. Thus, the antenna module can suppress an increase in number of components and antenna performance deterioration caused by distortion of the antenna element, and can exhibit high assemblability during manufacturing of an antenna device.

Description

antenna module

The present invention relates to an antenna module capable of receiving radio wave signals.

Antenna modules that receive various radio signals are miniaturized and mounted on vehicles. Such an antenna module includes an antenna element and a circuit board as a conductive member, and has an air layer between the antenna element and the conductive member to form a capacitance (for example, , see Patent Document 1).

Further, for example, in the antenna module described in Patent Document 1, two or more capacitors are provided in parallel on the legs of the antenna element, and the additional capacitance is set accurately while electrically connecting the antenna element and the capacitor. . Further, in the antenna module described in Patent Document 2, the distance between the patch antenna element on the circuit board and the parasitic element is kept constant, and the parasitic element is fixed with a locking claw.

Japanese Patent Application Publication No. 2018-191111 JP 2021-057839 Publication

However, in the antenna module described in Patent Document 1, since it is necessary to provide two or more capacitors in the legs of the antenna element, the cost increases due to an increase in the number of parts and an increase in the number of work steps due to soldering work. Further, there are also restrictions on the size and shape of the shield case provided on the back surface of the circuit board. On the other hand, if an antenna element to be fed with power is fixed with a structure in which an external force is applied from above and below, such as the locking claw described in Patent Document 2, the antenna element may be distorted and the antenna performance may deteriorate.

Therefore, the present invention has been made in view of the above problems, and provides an antenna module that suppresses the deterioration of antenna performance due to an increase in the number of parts and distortion of the antenna element, and has good assemblability when manufacturing an antenna device. This is what I am trying to do.

(1) One aspect of the present invention includes a conductive member, an antenna element disposed on the conductive member, and a holder disposed between the conductive member and the antenna element. An antenna module comprising: a capacitance portion that forms capacitance between a top plate portion and the conductive member; and a capacitance portion that connects the top plate portion and the capacitance portion. a connecting portion, the holder has a base portion disposed between the capacitance portion and the conductive member, and when the holder is rotated, the conductive member and the antenna The element is fixed via the base portion.
(2) In the aspect of (1) above, the holder may have a body portion disposed between the top plate portion and the capacitance portion.
(3) In the aspect of (2) above, a rotation restriction mechanism may be provided that restricts rotation of the holder beyond the lock position.
(4) In the aspect of (3) above, a reverse rotation restriction mechanism may be provided that restricts reverse rotation of the holder to the unlocked position.
(5) In the aspect of (4) above, the reverse rotation regulating mechanism has an engaging portion on the holder and extends from the first end to the second end on the top plate portion of the antenna element. a connecting groove portion, the shape of the groove portion on the second end side in the reverse rotation direction of the holder does not match the rotation locus of the engaging portion in the reverse rotation direction of the holder; The engaging portion may be able to abut on the second end side of the groove portion so as to restrict reverse rotation of the holder.
(6) In the aspect of (4) above, the reverse rotation regulating mechanism has an engagement recess in the holder, and an engagement piece in the top plate portion of the antenna element, and the Reverse rotation of the holder may be restricted by engagement between the recess and the engagement piece.
(7) In any one of the above aspects (3) to (6), the rotation restriction mechanism has an engaging portion on the holder, and a first portion on the top plate portion of the antenna element. It has a groove that connects from an end to a second end, and the engaging part can come into contact with the first end of the groove in the direction of rotation of the holder so as to restrict rotation of the holder. It may be.
(8) In any one of the aspects (3) to (7) above, the rotation restriction mechanism has an abutment portion on the holder and is covered with the capacitance portion of the antenna element. The holder may include an abutting portion, and the abutting portion may be able to abut the abutted portion so as to restrict rotation of the holder.
(9) In the aspect of any one of (3) to (8) above, the rotation regulating mechanism has a convex portion on the base portion of the holder, and the electrostatic capacitance portion of the antenna element. The holder may have an opening, and the protrusion may be inserted into the opening so as to restrict rotation of the holder.
(10) In the aspect of any one of (1) to (9) above, the holder includes a tip portion that protrudes beyond the top plate portion of the antenna element, and the tip portion extends beyond the top plate portion. The base portion may be fixed so as to be biased toward the base portion.
(11) In the aspect of any one of (1) to (10) above, the holder has a body portion disposed between the top plate portion and the capacitance portion, and the capacitance portion The portion may include a bent portion that is bent toward the top plate portion, and the bent portion may contact the body portion so as to bias the base portion toward the top plate portion. .
(12) In any one of the above aspects (1) to (11), the conductive member may be a flat circuit board on which a receiving circuit capable of receiving radio wave signals is formed.
(13) In the aspect of (12) above, another antenna may be placed on the top plate portion of the antenna element.

According to the present invention, it is possible to provide an antenna module that suppresses deterioration of antenna performance due to an increase in the number of parts and distortion of the antenna element, and has good assemblability during manufacturing of the antenna device.

FIG. 1 is a perspective view showing an antenna module according to an embodiment of the present invention. FIG. 2 is a top view showing an antenna module according to an embodiment of the present invention. It is a front view showing an antenna module of an embodiment concerning the present invention. It is a side view showing an antenna module of an embodiment concerning the present invention. It is a bottom view showing an antenna module of an embodiment concerning the present invention. FIG. 1C is a cross-sectional perspective view showing a cross section taken along line BB in FIG. 1C. FIG. 1 is an exploded perspective view showing an exploded antenna module according to an embodiment of the present invention. FIG. 3 is a perspective view showing an antenna element. FIG. 3 is a top view showing the antenna element. It is a front view showing an antenna element. FIG. 3 is a side view showing an antenna element. FIG. 3 is a bottom view showing the antenna element. It is a perspective view showing a holder. FIG. 3 is a top view showing the holder. It is a front view showing a holder. FIG. 3 is a side view showing the holder. It is a bottom view showing a holder. FIG. 6 is an enlarged top view showing the state of the first rotation restriction mechanism in the unlocked position. FIG. 6 is an enlarged top view showing the state of the first rotation restriction mechanism at the lock position. FIG. 7 is an enlarged cross-sectional view showing the second rotation restriction mechanism in an unlocked position. FIG. 7 is an enlarged sectional view showing the state of the second rotation restriction mechanism at the lock position. FIG. 3 is an enlarged cross-sectional view showing the first biasing mechanism. FIG. 7 is an enlarged cross-sectional view showing the second biasing mechanism. FIG. 3 is a perspective view showing a modified antenna module according to the present invention. FIG. 6 is a front view showing a modified antenna module according to the present invention. It is a partial perspective view which shows the antenna module containing the 1st rotation restriction mechanism and the reverse rotation restriction mechanism in 2nd Embodiment based on this invention. It is a partial perspective view which shows the antenna element in 2nd Embodiment based on this invention. It is a partial perspective view which shows the holder in 2nd Embodiment based on this invention. FIG. 7 is a partial perspective view showing the state of the first rotation restriction mechanism in the unlocked position in the second embodiment of the present invention. FIG. 7 is a partial perspective view showing the state of the first rotation restriction mechanism in the lock position in the second embodiment of the present invention. FIG. 7 is a partial cross-sectional view showing a state of the first rotation restriction mechanism in a second embodiment according to the present invention in a preparatory stage for assembly. FIG. 7 is a partial cross-sectional view showing a state of the first rotation restriction mechanism in the middle of rotation in the second embodiment of the present invention. FIG. 7 is a partial cross-sectional view showing the state of the first rotation restriction mechanism in the lock position in the second embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In addition, in the embodiment of this specification, the same code|symbol is attached|subjected to the same member throughout.

1 shows an antenna module 1 according to an embodiment of the present invention, in which FIG. 1A is a perspective view, FIG. 1B is a top view, FIG. 1C is a front view, FIG. 1D is a side view, and FIG. 1E is a bottom view. 1F is a cross-sectional perspective view showing a cross section taken along the line BB in FIG. 1C. FIG. 2 is an exploded perspective view showing the antenna module 1 of the embodiment according to the present invention.

The antenna module 1 is an in-vehicle antenna device that receives various radio signals such as, for example, GNSS signals of satellite positioning systems, GSM signals of mobile communication systems, DSRC signals used for ETC services, AM waves, and FM waves.

This antenna module 1 includes an antenna element 10, a holder 20, and a circuit board 30, as shown in FIGS. 1A and 2.

First, the circuit board 30 forms a capacitance as a dielectric between it and the antenna element 10, although the details will be described later. Circuits, power supply circuits, etc. are formed. The radio signal extracted from the antenna element 10 is then used by various external devices connected to the circuit formed on the circuit board 30 via wiring cables.

This circuit board 30 is a rigid board made of, for example, a glass epoxy board, a paper phenol board, a paper epoxy board, etc., and is formed into a flat plate shape. The circuit board 30 may have the above-described circuit formed on one side, both sides, or multiple layers, and may transmit and receive radio signals from the antenna element 10 via a transmitting circuit.

Next, the antenna element 10 has a top plate section 11 , a capacitance section 12 , a connection section 13 , and a power feeding section 14 .
3 shows the antenna element 10, FIG. 3A is a perspective view, FIG. 3B is a top view, FIG. 3C is a front view, FIG. 3D is a side view, and FIG. 3E is a bottom view.

The antenna element 10 is made of a highly conductive metal (or alloy) material such as copper (Cu) or aluminum (Al), and its surface is coated with tin (Zn) plating, nickel (Ni) plating, etc. Sometimes it is administered.

The top plate portion 11 is a portion of the antenna element 10 that receives radio signals, and has a generally rectangular shape when viewed from above (see FIG. 3B). The top plate portion 11 is preferably about 25 mm x 25 mm, for example.

Furthermore, the top plate portion 11 is provided with a through hole 11c in the center.

The capacitance section 12 is placed apart from the circuit board 30 to form a capacitance (capacitor) as a dielectric between them. The capacitance section 12 has a generally rectangular outer shape when viewed from the bottom, and is arranged in parallel with a certain distance (interval) so as to face the top plate section 11 (see FIGS. 3C and 3D). ).

Further, the capacitance section 12 is divided into four regions 12A, 12B, 12C, and 12D, and cross-shaped openings 16a, 16b, 16c, and 16d are formed between them (Fig. 3E reference). Note that the regions 12A, 12B, 12C, and 12D may be partially connected to each other, for example, or the regions 12C and 12D, and the number of regions that divide the capacitance section 12 may also be changed. The number is not limited to the above four, but may be two, three, or five or more.

The regions 12A, 12B, 12C, and 12D are all located on the same plane parallel to the top plate portion 11. Furthermore, the corners of the regions 12A, 12B, 12C, and 12D on the center side are formed as bent portions 15A, 15B, 15C, and 15D.

The bent portions 15A, 15B, 15C, and 15D have a substantially triangular shape when viewed from above, except for the base end portions that connect to the regions 12A, 12B, 12C, and 12D, and have an arrow-like shape as a whole. ing. Note that the proximal end portions connected to the regions 12A, 12B, 12C, and 12D do not affect the strong electric fields formed at the tips of the bent portions 15A, 15B, 15C, and 15D on the regions 12A, 12B, 12C, and 12D. It is set up like this.

Furthermore, the bent portions 15A, 15B, 15C, and 15D are bent toward the top plate portion 11 (see FIG. 7), so that when an external force is applied from the top plate portion 11 side, the bending portions 15A, 15B, 15C, and 15D bend by themselves as a reaction. tries to return to its original position with its elastic (restoring) force. As a result, the top plate portion 11 is pressed against a holder 20, which will be described later, and absorbs looseness due to gaps due to assembly tolerances, variations in processing tolerances, and the like. Note that the ratio of the area occupied by the bent portions 15A, 15B, 15C, and 15D to the regions 12A, 12B, 12C, and 12D is preferably about 20% or less. By providing the bent portions 15A, 15B, 15C, and 15D with such positions and sizes in the capacitance portion 12, the influence on the resonant frequency of the antenna can be reduced.

The connection portion 13 connects (connects) the top plate portion 11 and the capacitance portion 12, and is formed as four pillars extending from the top plate portion 11 toward the capacitance portion 12. (See Figures 3C and 3D).

The power feeding section 14 electrically connects the antenna element 10 and the circuit board 30, and is formed as rod-shaped terminals 14a and 14b extending from the top plate section 11 toward the capacitance section 12. (See Figures 3C and 3D).

The terminals 14a and 14b are formed in lengths extending from the bottoms of the cutouts 11a and 11b of the top plate portion 11 toward the circuit board 30 so as to exceed the capacitance portion 12. The power feeding section 14 is inserted into through holes 30a and 30b formed in the circuit board 30. Note that the notches 11a, 11b and the terminals 14a, 14b may be arranged not only on two adjacent sides as shown in FIG. 3A, but also on two opposing sides.

Here, the above-mentioned top plate part 11, capacitance part 12, connection part 13, power supply part 14, and bending parts 15A, 15B, 15C, and 15D have the same thickness of about 0.5 mm to 1.0 mm ( It is formed by bending a single metal plate. In other words, the power feeding section 14 is formed by bending rod-shaped portions provided so as to protrude from the bottoms of the cutouts 11a and 11b of the top plate section 11 at 90 degrees.

On the other hand, the capacitive part 12 and the connecting part 13 are formed by bending the extending portions from the outer edges of the two opposing sides of the top plate part 11 at 90 degrees at the boundary with the top plate part 11. It is formed by bending at 90 degrees at the boundary between and the connecting portion 13. In order to facilitate these bending processes, a plurality of notches 12n are formed near the bending boundaries.

Note that the connecting portions 13 are not only arranged two on each side facing each other as shown in FIG. 3A, but also one connecting portion 13 may be arranged on all four sides. It is not limited to the four corners of 12, but may be any position on each side.

The holder 20 has a base portion 21, a body portion 22, and a wing portion 23.
4 shows the holder 20, FIG. 4A is a perspective view, FIG. 4B is a top view, FIG. 4C is a front view, FIG. 4D is a side view, and FIG. 4E is a bottom view.

The base portion 21 is a plate-shaped (e.g., disk-shaped or rectangular) sandwiched between the capacitance portion 12 of the antenna element 10 and the circuit board 30, and forms a capacitance as a capacitor. In order to do this, the distance between the capacitance section 12 and the circuit board 30 is kept constant (see FIGS. 1C and 1D). Therefore, the base portion 21 is formed to have a uniform thickness that forms a predetermined capacitance. In addition, in this embodiment, the base part 21 will be explained below assuming that it is disk-shaped. The disk-shaped base portion 21 does not come into contact with the four corners of the capacitance portion 12, and an air layer is formed between the antenna element 10 and the circuit board 30, thereby reducing the influence on variations in dielectric constant. This is a preferable shape in that it can be suppressed.

In addition, the base portion 21 is formed with a number of hollow portions 21a penetrating through it so that the wavelength shortening effect when radio waves pass does not affect the received frequency (see FIGS. 4B and 4E). . The hollowed out portion 21a is formed as four L-shaped or claw-shaped through openings, each consisting of a trapezoidal portion extending diametrically from the center and an arcuate portion extending 45 degrees in the circumferential direction. .

Next, the body part 22 is a columnar part that stands up on the base part 21, and extends between the top plate part 11 and the capacitance part 12 of the antenna element 10 (FIG. 1F, 4C and FIG. 4D).

The blade portion 23 is provided to protrude outward from the body portion 22 (above the base portion 21), and is formed between the top plate portion 11 and the capacitance portion 12 of the antenna element 10. It is formed at a height that fits in the space (see FIGS. 4C and 4D). That is, the blade portion 23 is provided with its lower end surface offset toward the top plate portion 11 by the thickness of the capacitance portion 12 from the upper surface of the base portion 21, and the blade portion 23 is provided with a holder attached to the antenna element 10. 20 is attached, its upper end surface supports the lower surface (inner surface) of the top plate portion 11.

The four blade portions 23 are provided in a cross shape at equal angles of 90 degrees. Although the details will be described later, the blade portion 23 maintains a constant distance between the top plate portion 11 and the capacitance portion 12, and acts like a support, so it does not affect the dimensional accuracy of the antenna element 10. As long as the strength is sufficient, at least one, preferably two, is sufficient. Note that the blade portion 23 and the diametrical portion of the hollowed out portion 21a are arranged so as to overlap when viewed from the bottom.

A cylindrical tip portion 24 is formed at the tip of the body portion 22 (see FIGS. 4C and 4D), and is inserted or fitted into the through hole 11c of the top plate portion 11 (see FIG. 1F). Furthermore, after the tip portion 24 is attached to the antenna element 10, it is welded by heat welding, ultrasonic welding, or the like. In addition, the welding process of this front end part 24 will be described later together with the next rear end part 25.

Further, a cylindrical rear end portion 25 is formed on the back side of the base portion 21 (see FIGS. 4C and 4D), and is inserted or fitted into a through hole 30c formed in the circuit board 30. (See Figure 1E). Note that the rear end portion 25 is also welded by heat welding, ultrasonic welding, or the like after being attached to the antenna element 10.

The holder 20 described above is preferably molded as an insulating member from a resin material such as polypropylene (PP) or polyoxymethylene (POM).

Next, the fixing structure for fixing the antenna element 10 and holder 20 to each other will be explained while explaining the procedure for assembling the antenna module 1.

First, the posture is maintained so that the cross-shaped blade portion 23 of the holder 20 and the cross-shaped openings 16a, 16b, 16c, and 16d of the antenna element 10 are aligned, and the tip portion 24 is inserted into the through hole 11c. (In some cases, this initial position is referred to as the unlock position. See FIG. 6A.)

At this time, the power supply part 14 is inserted near the corner of the L-shaped hollowed out part 21a.

Next, the holder 20 is rotated clockwise around the axis of the tip portion 24 (or rear end portion 25) when viewed from the base portion 21 side. At this point, the postures (angles) of the cross-shaped blade portion 23 and the cross-shaped openings 16a, 16b, 16c, and 16d do not match, and the blade portion 23 passes through the openings 16a, 16b, 16c, and 16d. Therefore, the antenna element 10 and the holder 20 are connected to each other to such an extent that they cannot easily fall off.

The holder 20 is further rotated clockwise to rotate, for example, 45 degrees from the unlocked position before rotation (this rotated position is referred to as the locked position. See FIG. 6B). At this time, further rotation of the holder 20 is restricted by a rotation restriction mechanism, which will be described later, and counterclockwise rotation of the holder 20 to the unlocked position is also restricted by a reverse rotation restriction mechanism, which will also be described later. Then, the antenna element 10 and the holder 20 are in a locked state.

On the other hand, the power supply section 14 is inserted into the arc-shaped portion of the L-shaped hollowed out section 21a. Therefore, the arc-shaped portion of the hollowed-out portion 21 a is formed to include a rotation locus along which the power feeding portion 14 rotates relative to the base portion 21 .

Note that the direction of rotation from the unlocked position to the locked position is clockwise, but it can be made counterclockwise by changing the shape of the hollowed out portion 21a of the base portion 21 in a line-symmetric manner with respect to the diametrical direction. is also possible.

Next, the circuit board 30 is attached to the back surface of the base portion 21 of the holder 20. At this time, the rear end part 25 of the holder 20 is inserted into the through hole 30c of the circuit board 30, and the power feeding part 14 (14a, 14b) of the antenna element 10 is inserted into the through hole 30a, 30b of the circuit board 30, respectively. Ru.

Thereafter, the front end 24 and rear end 25 protruding from the antenna element 10 and circuit board 30 are welded to integrally fix the antenna element 10, holder 20, and circuit board 30. Finally, the power feeding section 14 is soldered to enable electricity to be supplied from the circuit board 30 to the antenna element 10, and the assembly work is completed.

Here, a rotation restriction mechanism and a reverse rotation restriction mechanism that respectively restrict rotation and reverse rotation of the holder 20 will be explained. The antenna module 1 includes a plurality of rotation restriction mechanisms and reverse rotation restriction mechanisms having different structures.

The first rotation restriction mechanism has an engaging portion 221 on the blade portion 23 (or body portion 22) of the holder 20, and also has a groove portion 111 on the top plate portion 11 of the antenna element 10. .
5 shows the first rotation regulating mechanism, FIG. 5A is an enlarged top view showing the state in the unlocked position, and FIG. 5B is an enlarged top view showing the state in the locked position.

The engaging portion 221 is provided so as to protrude from the upper surface of the blade portion 23 (top plate portion 11 side), and also extends in the rotation direction (counterclockwise when viewed from above) when viewed in cross section from the normal direction of the rotation locus. It is formed in a tapered shape so that the front side of the front side is lower (see FIG. 4A). Note that the height of the engaging portion 221 is preferably equal to or greater than the thickness of the top plate portion 11.

On the other hand, the groove part 111 is provided as a groove connected from the first end part 111a to the second end part 111b so as to surround the through hole 11c of the top plate part 11, and between each groove part 111, there are four bridge parts. 112 is formed (see FIG. 3B). That is, the periphery of the central through-hole 11c is formed as an island portion 113 surrounded by a groove portion 111, and is supported by four bridge portions 112. Note that the groove portion 111 does not need to be provided to penetrate the top plate portion 11.

When the holder 20 is attached to the antenna element 10, the engaging part 221 is inserted into the second end 111b side of the groove part 111 in the unlocked position (see FIGS. 1F and 5A). ). Thereafter, when the holder 20 is rotated from the unlocked position to the locked position, the engaging part 221 sinks below the edge of the island part 113 because the front side is lower, and the first end It moves to the side of section 111a. When the locking position is reached by rotating 45 degrees from the unlocking position, the front end of the engaging portion 221 contacts the first end 111a, and the rotation of the holder 20 is restricted (see FIG. 5B).

Although the first rotation restriction mechanism of the present embodiment had four sets of combinations consisting of the engaging portion 221 and the groove portion 111, the rotation restriction function can be sufficiently performed by having at least one set. By increasing the number of parts, the effect can be further enhanced, and the strength and durability of each part can also be improved. Further, by simply having at least one set of the engaging portion 221 and the groove portion 111, the assembly direction of the holder 20 relative to the antenna element 10 can be uniquely determined, and incorrect attachment can be prevented. By providing the island portion 113 as described above on the top plate portion 11, the influence on the resonance frequency of the antenna can be reduced.

Incidentally, even if the holder 20 is attempted to be rotated in the reverse rotation direction from the state where the engaging portion 221 is engaged with the groove portion 111 and is in contact with the first end portion 111a, the engaging portion 221 is Since the holder 20 cannot be moved toward the second end 111b, the holder 20 cannot be reversely rotated to the unlocked position.

Specifically, the shape of the groove portion 111 on the second end 111b side in the reverse rotation direction of the holder 20 does not match the rotation locus of the engaging portion 221 in the reverse rotation direction of the holder 20. This restricts the reverse rotation of the holder 20. That is, since the rotation locus of the engaging portion 221 is arc-shaped, the shape of the groove portion 111 that does not match the rotation locus of the engagement portion 221 may be, for example, an arcuate shape having a radius that does not match the radius of the rotation locus. It is better to include a part that is not arcuate or arc-shaped. Alternatively, the width of the groove may be constant and extend linearly, or the width of the groove may be narrower toward the second end portion 111b and extend linearly or curved.

Even if an attempt is made to reversely rotate the engaging portion 221 to the unlock position with respect to the groove portion 111 having such a shape, the engaging portion 221 contacts and gets caught on the side wall of the groove portion 111 on the second end side 11b side. This will restrict further reverse rotation.

In this way, the first rotation restriction mechanism also acts as the first reverse rotation restriction mechanism, so that the first rotation restriction mechanism has an engaging portion on the blade portion 23 (or body portion 22). 221, and the top plate portion 11 has the groove portion 111.

Next, the second rotation regulating mechanism has a contact portion 232 on the blade portion 23 (or body portion 22), and a contact portion 152 on the capacitance portion 12. .
FIG. 6 shows the second rotation regulating mechanism, FIG. 6A is an enlarged sectional view showing the state at the unlocked position, and FIG. 6B is an enlarged sectional view showing the state at the locked position.

The contact portion 232 is provided so as to protrude from the lower surface (base portion 21 side) of the blade portion 23 (see FIGS. 6A, 6B, and 7). This contact portion 232 is formed as an inclined surface inclined at 45 degrees with respect to the thickness of the blade portion 23.

On the other hand, the abutted portion 152 is formed by the end surfaces of the bent portions 15A, 15B, 15C, and 15D of the capacitive portion 12 (see FIGS. 6A and 6B). The abutted portion 152 is formed to match the end surfaces of the openings 16a, 16b, 16c, and 16d.

When the holder 20 is attached to the antenna element 10, the contact portions 232 are located at the openings 16a, 16b, 16c, and 16d in the unlocked position (see FIG. 6A). Thereafter, when the holder 20 is rotated from the unlocked position to the locked position, the contact portion 232 also rotates. When the lock position is reached by rotating 45 degrees from the unlock position, the contact portion 232 contacts the contact portions 152 of the bent portions 15A, 15B, 15C, and 15D, and the rotation of the holder 20 is restricted. (See FIG. 6B).

Although the second rotation restriction mechanism of the present embodiment had four sets of combinations consisting of the abutting part 232 and the abutted part 152, having at least one set is enough to prevent rotation. By performing a regulating function and increasing the number of parts, the effect can be further enhanced, and the strength and durability of each part can be improved.

Continuing, the third rotation regulating mechanism has a convex portion 213 on the surface of the base portion 21 on the antenna element 10 side (see FIG. 4A), and also has openings 16a, 16b in the capacitive portion 12. , 16c, and 16d (see FIG. 3E).

As described above, the openings 16a, 16b, 16c, and 16d are formed as gaps (for example, about 3 mm) between the regions 12A, 12B, 12C, and 12D, and the opposing sides are provided parallel to each other. ing.

On the other hand, the convex portion 213 has an outer diameter (outer diameter) that is equal to or slightly smaller than the width of the openings 16a, 16b, 16c, and 16d. The convex portion 213 has a dome-like shape like a part of a sphere cut out with a plane, and the outer edge is circular when viewed from the top, but when viewed from the top, the outer edge is a rectangular parallelepiped or hexagonal prism with a rectangular or hexagonal shape. It may be a shape or the like. In addition, in the case of a polygonal prism, it is preferable to adjust the angle of the opposite side so that when it is rotated by 45 degrees, it coincides with the opposite sides of the openings 16a, 16b, 16c, and 16d.

Further, the convex portion 213 is preferably provided at a position such that the phase differs by 45 degrees with respect to the four blade portions 23.

When the holder 20 is attached to the antenna element 10, the convex portion 213 is in contact with the back surface of the regions 12A, 12B, 12C, and 12D of the capacitive portion 12 in the unlocked position. Thereafter, when the holder 20 is rotated from the unlocked position to the locked position, the convex portion 213 moves toward the openings 16a, 16b, 16c, and 16d while contacting the back surface of the capacitive portion 12. Rotate. When the lock position is reached, which is rotated 45 degrees from the unlock position, the protrusions 213 are fitted into the openings 16a, 16b, 16c, and 16d, and the rotation of the holder 20 is restricted (Fig. 1A and (See 1F).

At this time, since the protrusions 213 are fitted into the openings 16a, 16b, 16c, and 16d, they cannot be rotated clockwise or counterclockwise. In other words, this third rotation restriction mechanism also functions as a reverse rotation restriction mechanism.

Although the present embodiment has four convex portions 213, having at least one convex portion sufficiently performs the rotation restriction function and the reverse rotation restriction function, and increasing the number of convex portions 213 can further enhance the effect. The strength and durability of each part can be improved.

By the way, in consideration of assembly workability, it is preferable that the antenna module 1 includes first to third rotation restriction mechanisms and first and third reverse rotation restriction mechanisms as locking means. However, if the power feeding part 14 of the antenna element 10 is soldered to the circuit board 30 while the base part 21 of the holder 20 is sandwiched between the capacitance part 12 of the antenna element 10 and the circuit board 30, In addition to making it possible to feed power to the antenna element 10, since the holder 20 does not rotate naturally due to frictional force acting between each member, at least one of the rotation restriction mechanisms or reverse rotation mechanism described above is used. Sufficient effects can be expected by providing a regulatory mechanism.

Therefore, the rotation regulating mechanism is provided between the top plate portion 11 of the antenna element 10 and the blade portion 23 of the holder 20, between the capacitance portion 12 of the antenna element 10 and the blade portion 23 of the holder 20, and between the antenna element 10 and the blade portion 23 of the holder 20. It is preferable to provide at least one between the capacitance section 12 of the holder 20 and the base section 21 of the holder 20.

Note that the rotation restriction mechanism restricts further rotation of the holder 20 when the holder 20 is rotated clockwise from the unlocked position to the locked position. The rotation angle may be within the range of 15 degrees to 45 degrees, for example. However, since the blade portion 23 is held between the top plate portion 11 and the capacitance portion 12, the angle is preferably 45 degrees in order to evenly distribute the load.

Further, the reverse rotation restriction mechanism restricts the holder 20 from rotating in the reverse direction from the locked position to the unlocked position, and there is no need for the holder 20 to remain immobile in the locked position. For example, if the holder 20 is rotated 45 degrees clockwise from the unlocked position to the locked position, even if the holder 20 is rotated counterclockwise within the range of 20 to 30 degrees (backward), it will not return from the unlocked position. Since the holder 20 is rotated by 15 degrees or more in the direction of the lock position, the holder 20 will not fall off from the antenna element 10. Therefore, in the first and third reverse rotation regulating mechanisms, the size and shape of the engaging portion 221 or the size and shape of the second end 111b side of the groove portion 111, so as to allow a slight reverse rotation. Further, the dimensions and shapes of the convex portion 213 or the dimensions and shapes of the openings 16a, 16b, 16c, and 16d may be changed as appropriate.

Furthermore, as described above, the rotation direction of the holder 20 during assembly work is clockwise when viewed from the mounting direction of the holder 20 (direction from the base portion 21 to the distal end portion 24), but counterclockwise. It may be around. In that case, the reverse rotation direction is a clockwise direction.

Finally, a biasing mechanism that biases the antenna element 10 and holder 20 into close contact will be described.

The biasing mechanism is configured to control each component (especially, Since the antenna element 10 is formed by sheet metal (bending) processing, it is possible to suppress wobbling due to tolerances of the sheet metal (bending) or temperature deformation.
FIG. 7 is an enlarged sectional view showing the first biasing mechanism. FIG. 8 is an enlarged sectional view showing the second biasing mechanism.

First, the first biasing mechanism biases the holder 20 in the direction of the top plate portion 11, and is provided in the capacitance portion 12 of the antenna element 10. Specifically, the bending portions 15A, 15B, 15C, and 15D provided in the capacitance portion 12 push the holder 20 through the blade portion 23 (the bottom surface thereof) to the top plate portion 11 due to its elastic restoring force. It performs a biasing function by lifting it toward the direction (see Fig. 7). Therefore, the bent portions 15A, 15B, 15C, and 15D act as part of the second rotation restriction mechanism and the first biasing mechanism.

Next, the second biasing mechanism biases the top plate portion 11 of the antenna element 10 in the direction of the capacitance portion 12, and is provided on the antenna element 10 and the holder 20. Specifically, the bridge portion 112 and the island portion 113 of the top plate portion 11 are formed by being pressed (offset) in the direction opposite to the capacitance portion 12, and the tip portion 24 provided on the body portion 22 is formed. It is welded (including caulking) (see Figure 8).

Then, by welding the tip portion 24 while pressing the top plate portion 11 toward the capacitance portion 12, the island portion 113 between the through hole 11c and the groove portion 111 is bent downward, and the elastic reaction force is It generates and performs an energizing function. Note that instead of fixing the tip portion 24 by welding, fixing by mechanical means such as screws or clips may be used.

Continuing, the third biasing mechanism biases the circuit board 30 in the direction of the base portion 21 of the holder 20, and is provided in the holder 20. Specifically, the biasing function is achieved by welding (including caulking) the rear end portion 25 provided on the base portion 21 (see FIGS. 1E and 7). At this time, it is preferable to weld and fix the circuit board 30 while pressing it toward the base part 21.

Here, in consideration of dimensional stability, it is preferable that the antenna module 1 includes first to third biasing mechanisms. However, if the parallelism accuracy between the top plate part 11 of the antenna element 10 and the capacitance part 12 and the parallelism precision between the capacitance part 12 and the circuit board 30 are sufficiently high, that is, the dimensional error is reduced. If it is small, a sufficient effect can be expected by providing one of the biasing mechanisms.

Further, the processing operation for fixing the front end portion 24 and rear end portion 25 of the second and third biasing mechanisms may be performed in any order.

Finally, a modification (second embodiment) of the first rotation restriction mechanism and the first reverse rotation restriction mechanism will be described. Note that in the second embodiment, the same structure as that of the first embodiment can be adopted for the configurations other than the first rotation restriction mechanism and the reverse rotation restriction mechanism.
FIG. 10A is a partial perspective view showing an antenna module 1 including a first rotation restriction mechanism and a reverse rotation restriction mechanism in a second embodiment of the present invention. FIG. 10B is a partial perspective view showing an antenna element 110 in a second embodiment according to the present invention. FIG. 10C is a partial perspective view showing the holder 120 in the second embodiment of the present invention. 10D to 10H show the first rotation restriction mechanism in the second embodiment of the present invention, FIG. 10D is a partial perspective view showing the state in the unlocked position, and FIG. 10E is a partial perspective view showing the state in the locked position. FIG. 10F is a partial sectional view showing the state in the pre-assembly stage, FIG. 10G is a partial sectional view showing the state in the middle of rotation, and FIG. 10H is the locked position. FIG.

First, the first rotation restriction mechanism in the second embodiment shown in FIG. 10A has an engaging portion 1231 on the blade portion 123 (or body portion 122) of the holder 120 (see FIG. 10C), and The top plate portion 117 of the antenna element 110 has a groove portion 118 (see FIG. 10B).

The engaging portion 1231 is provided to protrude from the upper surface of the blade portion 123 in a boss shape (cylindrical shape).

On the other hand, the groove portion 118 is formed in an arc shape centered on the rotational axis of the holder 120, passing through the top plate portion 117. Furthermore, the groove portion 118 has a first end portion 118a that is on the leading side in the rotation direction when attached to the antenna element 110, and a second end portion 118b that is on the rear end side.

Since only one set of these engaging portions 1231 and groove portions 118 are provided, the positional relationship between the antenna element 110 and the holder 120 (for example, the angle and direction with respect to the power feeding portion 14) is uniquely determined. However, the number of engagement portions 1231 and groove portions 118 is not limited to one set, and a plurality of them may be provided as long as the positional relationship is uniquely determined. For example, two sets may be provided on adjacent blade portions 123 that are not diagonal. I can do it.

Furthermore, the first rotation restriction mechanism has an engaging recess 1232 in the blade part 123 of the holder 120 (see FIG. 10C), and also has an engaging piece 1112 in the top plate part 117 of the antenna element 110. (See Figure 10B).

The four engaging pieces 1112 are provided inside a cross-shaped opening formed at the (diagonal) center of the top plate portion 117, and are tongue-like pieces extending from the outer edge of the opening toward the center. It is formed into a beam-like shape. Further, the engagement piece 1112 is bent or curved to protrude from the back surface of the top plate portion 117 toward the capacitance portion 119 side, and can be elastically deformed toward the top plate portion 117 side. . Note that the number of engagement pieces 1112 is preferably the same as the number of blades 123 of the holder 120, but it is preferable that at least one engagement piece 1112 is provided.

On the other hand, the engagement recess 1232 is formed to be depressed from the upper surface (top surface) of the blade portion 123 and to become deeper toward the rotation axis. The shape of the engagement recess 1232 when viewed from above is the same as or slightly larger than the shape of the engagement piece 1112, so that the engagement piece 1112 and the engagement recess 1232 can engage with each other.

When attaching the holder 120 to these antenna elements 110, the engaging portion 1231 is inserted into the second end 118b side of the groove portion 118 in the unlocked position (see FIG. 10D). At this time, the engaging portion 1231 may be in contact with the second end portion 118b of the groove portion 118 or may be located close to the second end portion 118b. This prevents rotation in the opposite direction, which is not the rotation direction from the unlocked position to the locked position. Further, the distal end portion 124 of the holder 120 is positioned so as to protrude from the center where the four tongue-shaped engagement pieces 1112 face each other (see FIG. 10F).

Next, when the holder 120 is rotated from the unlocked position to the locked position, the engaging portion 1231 moves toward the first end 118a along the arcuate groove 118 (see FIG. 10E). At this time, since the engaging piece 1112 protrudes toward the capacitive part 119 side, it is pushed up toward the top plate part 117 by the upper surface of the blade part 123 (see FIG. 10G), and rotates around the upper surface of the blade part 123. Move.

Then, when the holder 120 is rotated 45 degrees with respect to the antenna element 110 and reaches the locked position from the unlocked position (see FIG. 10E), that is, when the engaging portion 1231 reaches the first end 118a, the blade The engagement piece 1112, which had been lifted toward the top plate section 117 on the upper surface of the section 123, returns to the capacitance section 119 side by its own elastic force, and falls into the engagement recess 1232 (see FIG. 10H). When the engaging piece 1112 is inserted, a clicking feeling (sound) is generated, so that the operator can be informed that the rotation of the holder 120 with respect to the antenna element 110 has been completed (fixed).

Furthermore, when the engagement piece 1112 fits into the engagement recess 1232, rotation of the holder 120 relative to the antenna element 110 in either the forward or reverse direction is restricted. On the other hand, when the engaging portion 1231 comes into contact with the first end 118a, the rotation of the holder 120 in the rotation direction is restricted (see FIG. 10E). Therefore, a part of the first rotation restriction mechanism also functions as the first reverse rotation restriction mechanism.

In this way, even with the first rotation restriction mechanism and the reverse rotation restriction mechanism in the second embodiment, rotation of the holder 120 relative to the antenna element 110 in the forward direction or the reverse direction can be restricted. Note that the tip portion 124 is welded after assembly is completed in the same manner as in the first embodiment.

As explained above, the antenna module of the embodiment according to the present invention includes the circuit board 30 which is a conductive member, the antenna elements 10 and 110 disposed on the circuit board 30, the circuit board 30 and the antenna element 10, 110, the antenna element 10, 120 forms a capacitance between the top plate part 11, 117 and the circuit board 30. The holder 20, 120 has a capacitive part 12, 119 that connects the capacitive part 12, 119, and a connecting part 13 that connects the top plate part 11, 117 and the capacitive part 12, 119. and a circuit board 30, and when the holder 20, 120 is rotated, the circuit board 30 and the antenna element 10, 120 are fixed via the base part 21. . As a result, the antenna elements 10, 110 and the holders 20, 120 can be assembled by simply rotating the antenna elements 10, 110 and the holders 20, 120 relative to each other without using nail fixing or soldering work. , 120 can be easily fixed. Further, the distance between the antenna elements 10, 110 and the circuit board 30 can be kept constant, and a capacitance can be formed between them. Therefore, the chip capacitor seen in Patent Document 1 can be made unnecessary.

The holders 20, 120 of the embodiment have body parts 22, 122 arranged between the top plate parts 11, 117 and the capacitance parts 12, 119. Thereby, the top plate portions 11, 117 and the capacitive portions 12, 119 can be maintained (supported) at a constant distance.

The antenna module 1 of the embodiment includes a rotation restriction mechanism that restricts rotation of the holders 20 and 120 beyond the lock position. This restricts the rotation of the holders 20, 120 at the lock position, and prevents the holders 20, 120 from continuing to rotate and reach the unlock position.

The antenna module 1 of the embodiment includes a reverse rotation restriction mechanism that restricts the reverse rotation of the holders 20 and 120 to the unlock position. Thereby, it is possible to prevent the holders 20, 120 from returning to the unlocked position.

The reverse rotation restriction mechanism of the embodiment has an engaging portion 221 on the holder 20 and a groove portion 111 on the top plate portion 11 of the antenna element 10, and the groove portion 111 is configured to prevent the holder 20 from rotating in the reverse rotation direction. The shape of the second end portion 111b side does not match the rotation locus of the engaging portion 221 in the reverse rotation direction of the holder 20, and the engaging portion 221 is designed to restrict the reverse rotation of the holder 20. , can come into contact with the second end 111b of the groove 111 in the rotational direction of the holder 20. Thereby, reverse rotation of the holder 20 can be restricted on the top plate portion 11 side of the antenna element 10.

The reverse rotation restriction mechanism of the (second) embodiment has an engagement recess 1232 in the holder 120 and an engagement piece 1112 in the top plate portion 117 of the antenna element 110, which engages with the engagement recess 1232. By engaging with the coupling piece 1112, reverse rotation of the holder 120 is restricted. Thereby, reverse rotation of the holder 120 can be restricted on the top plate portion 117 side of the antenna element 110. Furthermore, by providing the engagement recess 1232 in the holder 120, the engagement area can be increased compared to the case where the engagement part 221 is provided in the holder 20 in a protruding manner. can be increased. Furthermore, the urging force generated by the elastic deformation of the engagement piece 1112 can increase the adhesion force and adhesion (less wobbling) between the antenna element 110 and the holder 120.

The rotation regulating mechanism of the embodiment has engaging parts 221, 1231 in the holders 20, 120, groove parts 111, 118 in the top plate parts 11, 117 of the antenna element 10, and 1231 can come into contact with the first ends 111a, 118a in the rotational direction of the holders 20, 120 in the grooves 111, 118 so as to restrict the rotation of the holders 20, 120. Thereby, rotation of the holders 20, 120 can be restricted on the side of the top plate portions 11, 117 of the antenna elements 10, 110. Further, by having at least one set of engaging portions 221, 1231 and groove portions 111, 118, the assembly direction of holder 120 relative to antenna element 110 can be uniquely determined, and incorrect attachment can be prevented.

The rotation regulating mechanism of the embodiment has a contact portion 232 on the holder 20 and a contact portion 152 on the capacitance portion 12 of the antenna element 10 , and the contact portion 232 has a contact portion 232 on the holder 20 . It can abut against the abutted portion 152 so as to restrict rotation. Thereby, reverse rotation of the holder 20 can be restricted on the side of the capacitance section 12 of the antenna element 10.

The rotation regulating mechanism of the embodiment has a convex portion 213 on the base portion 21 of the holder 20, openings 16a, 16b, 16c, and 16d on the capacitance portion 12 of the antenna element 10, and the convex portion 213 is inserted into the openings 16a, 16b, 16c, and 16d so as to restrict rotation of the holder 20. Thereby, reverse rotation of the holder 20 can be restricted by a plurality of different structures on the side of the capacitance section 12 of the antenna element 10.

The holders 20 , 120 of the embodiment include tip portions 24 , 124 that protrude beyond the top plate portions 11 , 117 of the antenna elements 10 , 110 . It is fixed so that it is biased in the direction of. This makes it possible to maintain (support) the top plate parts 11, 117 and the capacitive parts 12, 119 at a constant distance, and even if there are dimensional errors in each part, the capacitive parts 12 and the base The portion 21 can be brought into close contact with the portion 21.

The holder 20 of the embodiment has a body part 22 disposed between the top plate part 11 and the capacitance part 12, and the capacitance part 12 is a folding body part 22 that is bent toward the top plate part 11. The bent portions 15A, 15B, 15C, and 15D contact the body portion 22 so as to bias the base portion 21 toward the top plate portion 11. Thereby, the top plate part 11 and the capacitive part 12 can be maintained (supported) at a constant distance, and even if there is a dimensional error in each part, the capacitive part 12 and the base part 21 can be maintained (supported) at a constant distance. Can be placed in close contact.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and variations can be made within the scope of the gist of the present invention as described in the claims. Changes are possible.

(Modified example)
In the above embodiment, the capacitance is formed by maintaining a constant distance between the capacitance portion 12 of the antenna element 10 and the circuit board 30, but a conductive member 40 is provided instead of the circuit board 30. In this way, the antenna module 1' may be configured such that the capacitance section 12 of the antenna element 10 and the conductive member 40 form a capacitance.
FIG. 9 shows a modified antenna module 1' according to the present invention, with FIG. 9A being a perspective view and FIG. 9B being a front view.

For example, the top plate portion 11 of the antenna module 1 may be used as the conductive member 40 of the antenna module 1', and the antenna module 1' may be placed on top of the antenna module 1. At this time, the antenna element 10' (the power feeding section 14') of the antenna module 1' is also electrically connected to the circuit board 30. Note that the antenna module 1 and the antenna module 1' may be fixed using fixing means provided on the holder 20'.

In addition, instead of the antenna module 1' described above, an antenna of a different type or structure such as a patch antenna or a ceramic antenna may be placed on the top plate part 11 of the antenna module 1, and these may be combined to form a three-layer antenna. The above structure may also be used.

In the above embodiment, the power feeding part 14 (terminals 14a, 14b) is integrally molded with the antenna element 10 (the top plate part 11 thereof). Power may be supplied by electrically connecting the circuit board 30.

Further, although the power feeding unit 14 is a two-point power feeding formed by two terminals 14a and 14b, it may be a one-point power feeding. In this case, the rotation angle from the unlocked position to the locked position by the first to third rotation restriction mechanisms described above can be set to a large angle such as 45 degrees or more, 60 degrees, or even 90 degrees or more. . Furthermore, the angle may be an appropriate angle depending on the number of regions into which the capacitance section 12 is divided.

1 Antenna module 10 Antenna element 11 Top plate part, 11a, 11b Notch part, 11c Through hole, 111 Groove part, 111a First end part, 111b Second end part, 112 Bridge part, 113 Island part 12 Capacitance part, 12A , 12B, 12C, 12D region, 12n notch, 15A, 15B, 15C, 15D bent portion, 152 abutted portion, 16a, 16b, 16c, 16d opening portion 13 connection portion 14 power feeding portion, 14a, 14b terminal 20 holder 21 base part, 21a lightening part, 213 convex part 22 body part, 221 engaging part 23 wing part, 232 contact part 24 tip part 25 rear end part 30 circuit board (conductive member), 30a, 30b through hole, 30c through hole 40 conductive member 110 antenna element 117 top plate portion, 118 groove portion, 118a first end portion, 118b second end portion, 1112 engaging piece, 119 capacitance portion 120 holder 122 body portion, 123 blade portion, 1231 Engagement part, 1232 Engagement recess, 124 Tip part

Claims

a conductive member;
an antenna element disposed on the conductive member;
An antenna module comprising: a holder disposed between the conductive member and the antenna element;
The antenna element includes a top plate portion, a capacitance portion that forms a capacitance between the conductive member, and a connection portion that connects the top plate portion and the capacitance portion. death,
The holder has a base portion disposed between the capacitance portion and the conductive member,
When the holder is rotated, the conductive member and the antenna element are fixed via the base portion.
An antenna module characterized by:
The holder has a body portion disposed between the top plate portion and the capacitance portion.
The antenna module according to claim 1, characterized in that:
comprising a rotation restriction mechanism that restricts rotation of the holder beyond a lock position;
The antenna module according to claim 2, characterized in that:
comprising a reverse rotation restriction mechanism that restricts reverse rotation of the holder to an unlock position;
The antenna module according to claim 3, characterized in that:
The reverse rotation regulating mechanism has an engaging part in the holder, and a groove part in the top plate part of the antenna element that connects from a first end to a second end;
The shape of the groove portion on the second end side in the reverse rotation direction of the holder does not match the rotation locus of the engaging portion in the reverse rotation direction of the holder,
The engaging portion is capable of abutting against a second end side of the groove portion so as to restrict reverse rotation of the holder.
The antenna module according to claim 4, characterized in that:
The reverse rotation restriction mechanism has an engagement recess in the holder and an engagement piece in the top plate portion of the antenna element,
Reverse rotation of the holder is restricted by the engagement of the engagement recess and the engagement piece;
The antenna module according to claim 4, characterized in that:
The rotation restriction mechanism has an engaging part in the holder, and has a groove part in the top plate part of the antenna element that connects from a first end to a second end,
The engaging portion is capable of abutting against a first end of the groove in a rotational direction of the holder so as to restrict rotation of the holder.
The antenna module according to any one of claims 3 to 6.
The rotation restriction mechanism has an abutting portion on the holder and an abutting portion on the capacitance portion of the antenna element,
The abutting portion is capable of abutting the abutted portion so as to restrict rotation of the holder;
The antenna module according to any one of claims 3 to 6.
The rotation restriction mechanism has a convex portion on the base portion of the holder, and has an opening portion on the capacitance portion of the antenna element,
the convex portion is inserted into the opening so as to restrict rotation of the holder;
The antenna module according to any one of claims 3 to 6.
The holder includes a tip portion that protrudes beyond the top plate portion of the antenna element,
The tip portion is fixed so as to urge the top plate portion toward the base portion.
The antenna module according to claim 1, characterized in that:
The holder has a body section disposed between the top plate section and the capacitance section,
The capacitance part includes a bent part bent toward the top plate part,
The bent portion contacts the body portion so as to bias the base portion toward the top plate portion.
The antenna module according to claim 1 or 10, characterized in that:
The conductive member is a flat circuit board on which a transmitting and receiving circuit capable of transmitting and receiving radio wave signals is formed.
The antenna module according to claim 1, characterized in that:
another antenna is placed on the top plate portion of the antenna element;
The antenna module according to claim 12.