JP5970131B2 - Window frame - Google Patents

Description

  The present invention relates to a window frame attached to a vehicle such as an automobile.

  When installing an antenna in a vehicle, it is preferable to install the antenna at a position as high as possible in the vehicle from the viewpoint of improving the antenna transmission / reception efficiency. From this, a roof top, a window glass, etc. are mentioned as a candidate of the installation place of a vehicle antenna.

  For example, a shark fin type antenna device is known as an antenna disposed on a roof portion of a vehicle body.

  Further, for example, glass antennas described in Patent Documents 1 and 2 below are known as antennas disposed on a window glass of a vehicle.

  The following Patent Document 1 discloses a high-frequency glass antenna for an automobile in which an antenna conductor and a power feeding portion are provided between a vehicle inner side (which has the same meaning as the cabin side) glass plate and a vehicle outer side glass plate. . According to this glass antenna, even when the antenna conductor and the power feeding portion are arranged at positions away from the metal body of the vehicle and the desired broadcast frequency band is a broadband broadcast frequency band, good antenna characteristics (high antenna gain and High F / B ratio) can be obtained.

  Patent Document 2 below discloses a window glass antenna in which a hot-side antenna wire is disposed in a horizontal direction so as to be electromagnetically coupled to an upper horizontal side of a metal window frame. According to this antenna, it is said that even a vertically polarized antenna can be disposed in the horizontal direction without substantially reducing the reception sensitivity.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2008-22538” (released on January 31, 2008) ” Japanese Patent Publication “JP 7-46016 A” (published February 14, 1995)

  However, when a shark fin type antenna device is installed on the roof portion of the vehicle, the antenna device protrudes from the roof surface, which greatly affects the design and aerodynamic characteristics of the automobile.

  In addition, the glass antennas described in Patent Documents 1 and 2 are arranged on a transparent window glass and are visible from both inside and outside the vehicle. Therefore, the appearance of the vehicle and the visibility from the vehicle are not limited. Will be affected.

  Thus, conventionally, it has been difficult to install an antenna for a vehicle so that the influence on the appearance of the vehicle can be suppressed and good antenna characteristics can be obtained at the same time.

  The inventors of the present application have invented a window frame in which an antenna is incorporated in a resin panel as a vehicle antenna device capable of obtaining good antenna characteristics while suppressing the influence on the appearance of the vehicle. The applicant of the present application has applied for this invention as Japanese Patent Application No. 2013-116430 (filed on May 31, 2013). However, in the invention according to the above-mentioned application, in order to obtain good antenna characteristics, restrictions are imposed on the arrangement of the power feeding unit provided in the antenna built in the resin panel. That is, there remains a problem that the degree of freedom of the shape or arrangement of the antenna built in the resin panel is limited.

  Therefore, the inventors of the present application provide a degree of freedom in the arrangement of the power feeding section by configuring the window guide fitted to the edge of the resin panel using a resin having a low dielectric loss tangent (0.67 or less). Invented a window frame in which an antenna is incorporated in a resin panel as an antenna device for a vehicle. In addition, the applicant of the present application has applied for this invention as Japanese Patent Application No. 2014-058845 (filed on March 20, 2014).

  However, when installing an antenna in a window frame, even if a window guide with a low dielectric loss tangent is used as in the above application, it is difficult to obtain good antenna characteristics because the distance from the metal is small. The problem remains.

  The present invention has been made in view of the above problems, and an object of the present invention is to realize a vehicular antenna device capable of obtaining good antenna characteristics while suppressing the influence on the appearance of the vehicle.

  In order to solve the above problems, a window frame according to the present invention includes a resin panel attached to the outside of a metal frame in which an opening for arranging a window is formed, and an antenna built in the resin panel. In the window frame, the metal frame includes a first flat portion located on the outer peripheral side of the opening and a first flat portion located on the inner peripheral side of the opening and positioned closer to the vehicle compartment than the first flat portion. The antenna has a first conductor pattern provided with a first feeding point and a second conductor pattern provided with a second feeding point, and When the antenna is divided into a first part and a second part by a straight line passing through one feeding point and the second feeding point, the points belonging to the first part in the first conductor pattern The longest electrical length from the first feeding point is the longest And the electrical length to the point where the electrical length from the second feeding point is the longest among the points belonging to the first portion in the second conductor pattern. The electrical length up to the point where the electrical length from the first feeding point becomes the longest among the points belonging to the second portion in the first conductor pattern, rather than the total value, and the second Of the points belonging to the second portion in the conductor pattern, the total value of the electrical length from the second feeding point to the point where the electrical length is the longest is small, and the direction of the antenna is It is characterized in that one portion is oriented closer to the second plane portion than the second portion.

  ADVANTAGE OF THE INVENTION According to this invention, the antenna apparatus for vehicles which can acquire a favorable antenna characteristic can be implement | achieved, suppressing the influence on the external appearance of a vehicle.

It is a perspective view showing the appearance of the window frame and vehicle concerning one embodiment of the present invention. It is a three-view figure which shows the structure of the window frame which concerns on one Embodiment of this invention. The external appearance of the rear door in the state where the window frame shown in FIG. 2 was attached is shown. (A) is sectional drawing of a part (part cut | disconnected by the CC cut line) of the rear door 30 shown in FIG. (B) is an enlarged view of a part of the rear door 30 shown in FIG. 3 (part cut by a BB cutting line and a CC cutting line). The 1st modification of the film antenna which concerns on this embodiment is shown. The 2nd modification of the film antenna which concerns on this embodiment is shown. The 3rd modification of the film antenna which concerns on this embodiment is shown. The 4th modification of the film antenna which concerns on this embodiment is shown. The 5th modification of the film antenna which concerns on this embodiment is shown. The 6th modification of the film antenna which concerns on this embodiment is shown. The 7th modification of the film antenna which concerns on this embodiment is shown. The 8th modification of the film antenna which concerns on this embodiment is shown. The 9th modification of the film antenna which concerns on this embodiment is shown. The 10th modification of the film antenna which concerns on this embodiment is shown.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, a direction (X-axis direction in the figure) corresponding to the front-rear direction of the vehicle 20 is referred to as “front-rear direction”, and a direction (Y-axis direction in the figure) corresponding to the left-right direction of the vehicle 20 is The direction corresponding to the vertical direction of the vehicle 20 (the Z-axis direction in the figure) is referred to as the “vertical direction”.

[Outline of window frame 10]
FIG. 1 is a perspective view showing the appearance of a window frame 10 and a vehicle 20 according to an embodiment of the present invention. A window frame 10 shown in FIG. 1 is a thin plate-like component having a substantially rectangular shape in the vertical direction (Z-axis direction in the figure), and is a door frame of the rear door 30 of the vehicle 20 (around the window 32 of the rear door 30). It is a part attached to the frame part of the front door and the window of the front door.

  The rear door 30 is configured to include a metal door frame 34 (see FIG. 3) having an opening for arranging the rear window 32, and the window frame 10 constitutes a B pillar portion in the door frame 34. It is attached to the surface of the part (surface outside the car). For this reason, the window frame 10 may be called a “B pillar cover”.

  The window frame 10 includes a resin panel 100 and a film antenna 200, and employs a configuration in which the film antenna 200 is built in the resin panel 100.

  The resin panel 100 is a resin (non-metallic) member that shapes the appearance of the window frame 10. The resin panel 100 is a thin plate and has a rectangular shape that is long in the vertical direction (Z-axis direction in the drawing). The width (width in the X-axis direction in the drawing) gradually increases toward the middle Z-axis negative direction).

  As described above, the film antenna 200 is built in the resin panel 100. The film antenna 200 is for receiving radio waves in a target frequency band. Specifically, an internal space 112 (see FIG. 2) is formed in the resin panel 100, and the film antenna 200 is exposed to the outside of the vehicle so as not to impair the appearance of the vehicle. Is placed inside.

  In the present embodiment, the film antenna 200 is preferably a DAB antenna or a 3G / LTE antenna. Not limited to this, the film antenna 200 may be an antenna other than the above. However, since the film antenna 200 is installed in the vehicle 20 in a posture substantially perpendicular to the ground plane, it is vertical like a DAB antenna, 3G / LTE antenna, FM / AM broadcast antenna, or the like. An antenna for receiving polarized waves is preferable from the viewpoint of increasing reception sensitivity.

  In the present embodiment, an example in which the film antenna 200 is provided on the window frame 10 of the rear window 32 on the left side (Y axis positive side in the drawing) of the vehicle 20 will be described, but the film is applied to other window frames. An antenna 200 may be provided. In this case, the window frame provided with the film antenna 200 may be a window frame of a window that can be opened or closed, or may be a window frame of a window that cannot be opened or closed. For example, the film antenna 200 may be provided on the window frame of the rear window on the right side (Y-axis negative side in the drawing) of the vehicle 20. Further, the film antenna 200 may be provided to the window frame of the front window on the left side of the vehicle 20 or the window frame of the front window on the right side of the vehicle 20.

[Configuration of window frame 10]
Next, the configuration of the window frame 10 will be described with reference to FIGS. FIG. 2 is a three-view diagram illustrating the configuration of the window frame 10 according to an embodiment of the present invention. FIG. 2A is a side view of the window frame 10 according to the embodiment of the present invention. FIG. 2B is a plan view of the window frame 10 according to the embodiment of the present invention. FIG.2 (c) is AA sectional drawing of the window frame 10 shown in FIG.2 (b).

  As shown in FIG. 2, the resin panel 100 of the window frame 10 includes a main part 110, a door frame support part 120 formed on the back side (inner side) and front side of the main part 110, and a rear side (vehicle side) of the main part 110. And a holding part 130 formed on the inner side and the rear side. The holding portion 130 is formed with an extending portion 140 that extends below the main portion 110.

(Main part 110)
The main part 110 is a thin plate-like part that forms the surface of the resin panel 100 (surface on the vehicle exterior side) and is long in the vertical direction (Z-axis direction in the figure). As shown in FIG. 2, an internal space 112 is formed in the main portion 110, and the film antenna 200 can be accommodated in the internal space 112. For example, the main part 110 is configured to be split into two in the thickness direction (Y-axis direction) with the internal space 112 as a boundary. In this case, the film antenna can be disposed in the internal space 112 by dividing the main part 110 into two parts and exposing the internal space 112. At this time, the film antenna 200 is preferably fixed in the internal space 112 by some fixing means (for example, an adhesive, an adhesive tape, etc.). Then, by assembling the divided main part 110, the resin panel 100 is in a state where the internal space 112 is closed again and the film antenna 200 is accommodated in the internal space 112. Thus, by arranging the film antenna 200 in the internal space 112, the film antenna 200 can be installed on the vehicle 20 integrally with the window frame 10 without being exposed to the outside of the vehicle.

(Door frame support 120)
In order to support the edge of the door frame 34, the door frame support part 120 is an edge of the front side (X-axis positive side in the figure) of the main part 110 on the back side (Y-axis negative side in the figure) of the main part 110. Is a portion extending in the vertical direction (Z-axis direction in the figure). As shown in FIG. 2C, the door frame support portion 120 includes a first wall portion 120 </ b> A perpendicular to the back surface of the main portion 110 and a second wall portion parallel to the back surface of the main portion 110. 120B is combined with each other in an L shape. Thereby, the door frame support part 120 forms an insertion opening that opens rearward on the back side of the main part 110. The edge of the door frame 34 can be inserted into the insertion port.

(Holding unit 130)
In order to hold the edge part of the rear window 32, the holding part 130 is on the rear side of the main part 110 (Y-axis negative side in the figure) on the edge on the rear side (X-axis negative side in the figure). A portion extending along the vertical direction (Z-axis direction in the drawing) along the line. As shown in FIG. 2C, the holding unit 130 includes a first wall portion 130 </ b> A perpendicular to the back surface of the main portion 110, and a second wall portion 130 </ b> B parallel to the back surface of the main portion 110. Are combined in an L-shape. Thereby, the holding part 130 forms the insertion opening opened rearward on the back side of the main part 110. A window guide 36 is attached to the insertion port, and the edge of the rear window 32 can be inserted.

(Extended part 140)
The extending part 140 is a part in which the holding part 130 extends downward (Z-axis negative direction in the figure) from the lower end part (end part on the Z-axis negative side in the figure) of the main part 110. For example, when the window frame 10 is attached to the door frame 34, the extending portion 140 is inserted into a gap located below the attachment position. Thus, for example, even when the rear window 32 is fully open, the edge of the rear window 32 is held by the extension 140.

[Configuration of the rear door 30]
Next, the configuration of the rear door 30 including the window frame 10 shown in FIG. 2 will be described with reference to FIGS. 3 and 4. FIG. 3 shows an appearance of the rear door 30 with the window frame 10 shown in FIG. 2 attached.

  As shown in FIG. 3, the window frame 10 is attached to the vehicle exterior side of the portion of the door frame 34 that surrounds the rear window 32 that forms the B pillar of the rear door 30. At this time, the extending portion 140 of the window frame 10 is inserted into the gap of the rear door 30 located below the B pillar portion. Specifically, the rear door 30 is inserted into a gap provided in the door body 31 that constitutes the door frame 34. The door body 31 is configured integrally with the door frame 34, or is configured by a door body on the passenger compartment side and a door body on the outside of the vehicle, and holds the lower end portion of the door frame 34 therebetween. It is provided in such a manner. By attaching the window frame 10 in this way, the film antenna 200 built in the window frame 10 is installed in the B pillar portion in a posture substantially perpendicular to the ground plane.

  The configuration of the B pillar portion of the door frame 34 and the state in which the window frame 10 is attached to the B pillar portion of the door frame 34 are shown in more detail in FIG. FIG. 4A is a cross-sectional view of a part of the rear door 30 shown in FIG. 3 (part cut along the CC cutting line). FIG. 4B is an enlarged view of a part of the rear door 30 shown in FIG. 3 (a part corresponding to a part cut along a BB cutting line and a CC cutting line).

[Configuration of door frame 34]
As shown in FIG. 4A, the door frame 34 (B pillar portion) includes a first flat portion 34A located on the front side (X-axis positive side in the drawing) and the rear side (X-axis negative side in the drawing). And a second planar portion 34B located at the center. The second plane portion 34B is located closer to the passenger compartment side (Y-axis negative side in the figure) than the first plane portion 34A. That is, there is a height difference between the first plane portion 34A and the second plane portion 34B. The reason is that in order to accommodate the rear window 32 in the door frame 34, the second plane portion 34B, which overlaps with the edge of the rear window 32, has a vehicle position relative to the first plane portion 34A. This is because it is recessed inward (Y-axis negative side in the figure). In the door frame 34, the first flat portion 34A and the second flat portion 34B are connected to each other by an inclined surface 34C provided therebetween.

[Attaching the window frame 10]
As shown in FIG. 4A, the edge portion of the first flat portion 34 </ b> A of the door frame 34 is inserted into the insertion port of the door frame support portion 120 included in the window frame 10. Further, a rubber window guide 36 (also referred to as a glass run channel) in which a groove is formed along the edge of the rear window 32 is attached to the insertion opening of the holding portion 130 provided in the window frame 10, Further, the edge of the rear window 32 is inserted into the groove formed in the window guide 36. As a result, the window frame 10 is attached to the B pillar portion of the door frame 34, and the edge portion of the rear window 32 is held. The window frame 10 may be more firmly fixed to the door frame 34 by still another fixing means (for example, an adhesive tape, an adhesive, a screw, a rivet, a pin, etc.).

  In this embodiment, EPDM (ethylene propylene diene rubber), which is excellent in weather resistance, cold resistance, ozone resistance, aging resistance, solvent resistance, and the like, is used as the material of the wind guide 36. In the present embodiment, the material of the window guide 36 mainly contains carbon black for the purpose of increasing the strength of the window guide 36.

[Configuration of Film Antenna 200]
As shown in FIG. 4, the film antenna 200 is disposed in the internal space 112 formed in the resin panel 100 of the window frame 10. The film antenna 200 includes a flexible substrate 202 and an antenna pattern formed on the surface of the flexible substrate 202. The flexible substrate 202 is a thin plate member having flexibility. For example, a dielectric film (for example, a polyimide film) is used as a material of the flexible substrate 202. The antenna pattern has a shape for receiving radio waves in a target frequency band, and includes, for example, a ground plane, a radiating element, a power feeding unit, a short circuit unit, and the like. The film antenna 200 is classified into a loop antenna, a monopole antenna, an inverted F antenna, and the like according to an antenna pattern. A thin plate-like conductor foil (for example, copper foil) is used for the material of the antenna pattern.

  As shown in FIG. 4B, the film antenna 200 of this embodiment includes a flexible substrate 202, a first conductor film 210 (first conductor pattern) functioning as a first radiating element, and a second The dipole antenna includes a second conductor film 220 (second conductor pattern) that functions as a radiating element, and a first feeding point P1 and a second feeding point P2. In FIG. 4B, the film antenna 200 is indicated by a solid line in order to make the arrangement and configuration of the film antenna 200 easier to understand. In fact, it is clear from FIG. 4A and the like that the film antenna 200 is disposed in the internal space 112 of the resin panel 100.

(First conductor film 210, second conductor film 220)
In the example shown in FIG. 4B, the first conductor film 210 and the second conductor film 220 are arranged side by side in the vertical direction (Z-axis direction in the figure) with the feeding points P1 and P2 facing each other. ing. The first conductor film 210 includes a main part having a vertically long rectangular shape, and a protruding part that protrudes downward from the lower left corner of the main part toward the second conductor film 220. Yes. The second conductor film 220 includes a main part having a vertically long rectangular shape and a protruding part protruding upward from the upper left corner of the main part toward the first conductor film 210. Has been. A first feeding point P <b> 1 is provided at the lower end of the protruding portion of the first conductor film 210. A second feeding point P <b> 2 is provided at the lower end of the protruding portion of the second conductor film 220.

  An inner conductor at the tip of the coaxial cable (not shown) is connected to the first feeding point P1, and an outer conductor at the tip of the coaxial cable is connected to the second feeding P2. The end portion of the coaxial cable is connected to a supply destination (for example, an amplifier circuit, various communication devices, etc.) of an electric signal generated by the film antenna 200.

  Here, in the main portion 110 of the resin panel 100, when the main portion 110 is viewed in plan from the vehicle outer side (Y-axis positive side in the figure), the region does not overlap with either the window guide 36 or the first flat portion 34A. Is defined as “non-overlapping region 110A” (see FIGS. 4A and 4B). In the window frame 10 of the present embodiment, the first feeding point P1 and the second feeding point P2 of the film antenna 200 are arranged in the non-overlapping region 110A as shown in FIG. In the following description, the first feeding point P1 and the second feeding point P2 may be referred to as a feeding unit). That is, the feeding portion of the film antenna 200 is disposed in the internal space 112 at a position that does not overlap with either the window guide 36 or the first flat surface portion 34A.

  It is preferable from the viewpoint of improving the radiation efficiency that the portion where the current contributing to radiation is concentrated, such as the power feeding portion, is not brought close to the rubber window guide 36. That is, when the film antenna 200 is built in the window frame 10, it is possible to suppress a reduction in the radiation efficiency of the film antenna 200 by arranging the power feeding unit so as not to overlap the rubber window guide 36. In particular, when EPDM is used as the material of the window guide 36 and when carbon black is included in the material of the window guide 36, the effectiveness of the configuration in which the power feeding portion is not overlapped with the window guide 36 is more effective. Rise. These materials are generally widely used as wind guide materials, but have a relatively large dielectric loss tangent indicating the degree of loss of electrical energy. Therefore, the window frame 10 of the present embodiment employs a configuration in which the power feeding portion does not overlap the window guide 36, and as a result, a vehicle antenna device capable of obtaining good antenna characteristics is realized. .

  In the window frame 10 of the present embodiment, the first feeding point P1 and the second feeding point P2 (feeding part) do not overlap with the first plane portion 34A of the door frame. Thereby, as for the film antenna 200 of this embodiment, the electric power feeding part is also spaced apart from the metal plate, and thus the effect of reducing the radiation characteristics is further suppressed. Note that the power feeding portion of the film antenna 200 only needs to be disposed at a position that does not overlap at least the window guide 36, and therefore may overlap the first planar portion 34 </ b> A. In addition, from the viewpoint that the power feeding unit is separated from the metal plate, the power feeding unit may be further arranged at a position that does not overlap with the inclined surface 34C.

  Moreover, materials other than EPDM (ethylene propylene diene rubber) may be used for the wind guide 36. Further, as the material of the window guide 36, a material that does not contain carbon black may be used. In any case, since a material having a relatively large dielectric loss tangent indicating the degree of loss of electric energy can be used, the configuration of the present embodiment in which the power feeding unit is arranged at a position not overlapping the wind guide 36 is adopted. Thus, it is possible to obtain the effect of suppressing the reduction in radiation efficiency.

  However, this invention may be the structure arrange | positioned so that the electric power feeding part of a film antenna may overlap with a wind guide when the principal part of a resin panel is planarly viewed from the vehicle outer side. This aspect will be described in an eleventh modification described later.

  Moreover, as shown in FIG.4 (b), the film antenna 200 of this embodiment is divided into the 1st part and the 2nd part by the straight line S which passes along the 1st feeding point P1 and the 2nd feeding point P2. When divided, the “first portion” to which the first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 belong is the first b portion 210b of the first conductor film 210. The second conductor film 220 is disposed in a direction closer to the second plane portion 34B than the “second portion” to which the second b portion 220b of the second conductor film 220 belongs.

  Here, among the first a portions 210a belonging to the “first portion”, the electric length from the first feeding point P1 to the point a1 where the electric length is the longest, and the first length belonging to the “first portion”. The total value of the 2a portion 220a and the electrical length up to the point b1 where the electrical length from the second feeding point P2 is the longest is the first value among the first b portions 210b belonging to the “second portion”. The electrical length from the second feeding point P2 to the point a2 where the electrical length from the feeding point P1 becomes the longest and the second b portion 220b belonging to the “second part” become the longest. It is larger than the total value with the electric length up to the point b2. That is, in the film antenna 200 of the present embodiment, the “first portion” is a portion that radiates a lower frequency in the use frequency band of the film antenna 200. Of the used frequency band, the portion that radiates a lower frequency has a shorter effective distance from the metal. Therefore, in the present embodiment, the first portion is the second flat portion provided in the metal frame 34 at a position farther from the resin panel 100 than the first flat portion 34A than the second portion. The film antenna 200 is arranged in a direction close to 34B.

  4A and 4B, a region facing the second planar portion 34B in the film antenna 200 is appropriately illustrated as “region 110B”. In the film antenna 200 of the present embodiment, when the first conductor film 210 and the second conductor film 220 arranged vertically are divided into right and left by a straight line S, a portion that radiates low frequency is configured on the right side. The right side faces the region 110B.

  Thus, according to the film antenna 200 of the present embodiment, an electromagnetic wave having a frequency lower than that of the “second portion” is emitted (that is, the effective distance from the metal frame 34 tends to be close). ”Is provided at a position farther away from the metal frame 34 than the“ second portion ”, and thus is less affected by the metal frame 34 and good antenna characteristics can be obtained.

[Modification]
Hereinafter, with reference to FIGS. 5 to 14, modifications of the film antenna 200 included in the window frame 10 of the present embodiment will be described. The window frame 10 of the present embodiment is not limited to the above-described embodiment even if the type, pattern shape, or position of the power feeding unit of the film antenna 200 is different from that shown in the above-described embodiment (FIG. 4B). The same effect can be obtained. In addition, the film antenna 200 shown in FIGS. 5-14 is an illustration to the last, and does not limit the film antenna of this embodiment.

[First Modification]
FIG. 5 shows a first modification of the film antenna 200 according to this embodiment. The film antenna 200 of the first modification example is similar to the film antenna 200 of the above-described embodiment (FIG. 4B), and includes a flexible substrate 202, a first conductor film 210 that functions as a first radiating element, The dipole antenna includes a second conductive film 220 that functions as a second radiating element, and a first feeding point P1 and a second feeding point P2.

  In the film antenna 200 of the first modification shown in FIG. 5, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) so as to face each other with the power feeding portion interposed therebetween. ) Are arranged side by side. The first conductor film 210 has a rectangular shape whose lateral width is smaller than that of the second conductor film 220. The second conductor film 220 includes a main portion having a substantially square shape, and a protrusion protruding upward from the upper left corner of the main portion toward the left side of the first conductor film 210. Has been. The first feeding point P1 provided on the lower side of the first conductor film 210 and the second feeding point P2 provided on the upper side of the main part of the second conductor film 220 are opposed to each other.

  Also in the film antenna 200 (dipole antenna) of the first modified example, the power feeding unit is disposed in the non-overlapping region 110A. Further, when the first conductor film 210 and the second conductor film 220 arranged in the vertical direction are divided on the right and left by a straight line S passing through the first feeding point P1 and the second feeding point P2, they are located on the right side of the straight line S. The first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 are formed on the left side of the straight line S. The part which radiates | emits a low frequency rather than the 2b part 220b of the 2nd conductor film 220 is comprised. The direction of the film antenna 200 is such that the first conductor film 210 is configured such that the first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 are arranged on the left side of the straight line S. It is in a direction closer to the second planar portion 34B than the first b portion 210b and the second b portion 220b of the second conductor film 220. As a result, the film antenna 200 radiates electromagnetic waves having a frequency lower than that of the “second portion” (that is, the effective distance from the metal frame 34 tends to be close) as in the above-described embodiment. ”Is provided at a position farther away from the metal frame 34 than the“ second portion ”, and thus is less affected by the metal frame 34 and good antenna characteristics can be obtained.

[Second to Fourth Modifications]
FIGS. 6-8 shows the 2nd-4th modification of the film antenna 200 which concerns on this embodiment. The film antenna 200 according to the second to fourth modifications includes a first conductor film 210 that functions as a radiating element, a second conductor film 220 that functions as a ground plane, and a power feeding unit (first feeding point P1 and second feeding film). And a feeding point P2), and an inverted-F antenna that includes a short-circuit portion 240 that short-circuits the first conductor film 210 and the second conductor film 220.

  In the film antenna 200 of the second modification shown in FIG. 6, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) so as to face each other with the power feeding portion interposed therebetween. ) Are arranged side by side. The first conductor film 210 includes a main part having a vertically long rectangular shape, and an enlarged part that is an area enlarged from the lower left corner of the main part toward the first feeding point P1. Has been. The second conductor film 220 includes a main portion having a vertically long rectangular shape, and an enlarged portion that is an area enlarged from the upper left corner of the main portion toward the second feeding point P2. Configured. In the film antenna 200 of the second modification, a power feeding part is provided between the enlarged part of the first conductor film 210 and the enlarged part of the second conductor film 220. Furthermore, in the film antenna 200 of the second modification, the enlarged portion of the first conductor film 210 and the enlarged portion of the second conductor film 220 are short-circuited by the strip-like short-circuit portion 240.

  In the film antenna 200 of the third modified example shown in FIG. 7, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) so as to face each other with the power feeding portion interposed therebetween. ) Are arranged side by side. The first conductor film 210 includes a main part having a vertically long rectangular shape, and an enlarged part that is an area enlarged from the lower left corner of the main part toward the first feeding point P1. Has been. The second conductor film 220 includes a main part having a substantially square shape and a protruding part that protrudes from the upper center of the main part toward the second feeding point P2. In the film antenna 200 of the third modified example, the feeding portion is provided between the enlarged portion of the first conductor film 210 and the protruding portion of the second conductor film 220. Furthermore, in the film antenna 200 of the third modification, the lower right corner of the main portion of the first conductor film 210 and the upper right corner of the main portion of the second conductor film 220 are formed by the strip-shaped short-circuit portion 240. It is short-circuited.

  In the film antenna 200 of the fourth modified example shown in FIG. 8, the first conductor film 210 has a strip-shaped first portion extending in the longitudinal direction and a strip-shaped strip extending in the left direction from an intermediate portion of the first portion. The second portion is configured. On the other hand, the second conductor film 220 has a generally vertically long rectangular shape. In the film antenna 200 of the fourth modified example, the second portion of the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (in the figure so that they face each other with the power feeding portion interposed therebetween). Are arranged side by side in the Z-axis direction). That is, in the film antenna 200 of the fourth modified example, the power feeding unit is provided between the second portion of the first conductor film 210 and the upper portion of the second conductor film 220. Furthermore, in the film antenna 200 of the fourth modified example, the left end of the second portion of the first conductor film 210 and the upper left corner of the second conductor film 220 are short-circuited by the strip-shaped short circuit portion 240. ing.

  In any of the film antennas 200 (inverted F antennas) of the second to fourth modifications, the power feeding unit is disposed in the non-overlapping region 110A. Further, when the first conductor film 210 and the second conductor film 220 arranged in the vertical direction are divided on the right and left by a straight line S passing through the first feeding point P1 and the second feeding point P2, they are located on the right side of the straight line S. The first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 are formed on the left side of the straight line S. The part which radiates | emits a low frequency rather than the 2b part 220b of the 2nd conductor film 220 is comprised. The direction of the film antenna 200 is such that the first conductor film 210 is configured such that the first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 are arranged on the left side of the straight line S. It is in a direction closer to the second planar portion 34B than the first b portion 210b and the second b portion 220b of the second conductor film 220. As a result, the film antenna 200 radiates electromagnetic waves having a frequency lower than that of the “second portion” (that is, the effective distance from the metal frame 34 tends to be close) as in the above-described embodiment. ”Is provided at a position farther away from the metal frame 34 than the“ second portion ”, and thus is less affected by the metal frame 34 and good antenna characteristics can be obtained.

[Fifth to sixth modifications]
9 to 10 show fifth to sixth modifications of the film antenna 200 according to the present embodiment. The film antenna 200 according to the fifth to sixth modifications includes an annular conductor film 250 that functions as a radiating element, and a feeding portion (first feeding point P1 and second feeding point) provided between the starting point and the ending point of the annular conductor film 250. The feeding point P2) is a loop antenna.

  In the film antenna 200 of the fifth modified example shown in FIG. 9, the annular conductor film 250 has a vertically long shape that starts from the first feeding point P1 and ends at the second feeding point P2, and surrounds the feeding unit constituted by these. It is stretched to draw a rectangular shape. Specifically, the annular conductor film 250 includes a first straight line portion extending leftward from the first feeding point P1, and a second straight line extending upward from the left end portion of the first straight line portion. A portion, a third straight portion extending rightward from the upper end portion of the second straight portion, a fourth straight portion extending downward from the right end portion of the third straight portion, and the fourth straight portion A fifth straight portion extending leftward from the lower end of the straight portion, a sixth straight portion extending upward from the left end of the fifth straight portion, and a fifth straight portion extending from the upper end of the sixth straight portion. And a seventh straight portion extending rightward with the second feeding point P2 as an end point.

  In the film antenna 200 of the sixth modified example shown in FIG. 10, the annular conductor film 250 has a portion extending in a meander shape with the first feeding point P <b> 1 as a starting point, the second feeding point P <b> 2 as an end point. While having, it is extended | stretched so that the vertically long rectangular shape surrounding the electric power feeding part (1st electric power feeding point P1 and 2nd electric power feeding point P2) may be drawn. Specifically, the annular conductor film 250 includes a meander portion extending in a meander shape upward (starting from the first feeding point P1) and extending rightward from the upper end portion of the meander portion. A first straight portion that extends, a second straight portion that extends downward from the right end portion of the first straight portion, and a third straight portion that extends leftward from the lower end portion of the second straight portion. A fourth linear portion extending upward from the left end portion of the third linear portion, and a fifth extending rightward from the upper end portion of the fourth linear portion with the second feeding point P2 as an end point And a straight portion.

  In any one of the film antennas 200 (loop antennas) of the fifth to sixth modifications, the power feeding unit is disposed in the non-overlapping region 110A.

  Further, in any of the film antennas 200 (loop antennas) of the fifth to sixth modifications, it is assumed that the annular conductor film 250 is divided into left and right by a straight line S passing through the first feeding point P1 and the second feeding point P2. In the annular conductor film 250, a portion (first portion) configured on the right side of the straight line S emits a lower frequency than a portion (second portion) configured on the left side of the straight line S. The film antenna 200 is configured such that the portion (first portion) configured on the right side of the straight line S is second than the portion (second portion) configured on the left side of the straight line S. It is arranged in a direction close to the plane portion 34B. As a result, the film antenna 200 radiates electromagnetic waves having a frequency lower than that of the “second portion” (that is, the effective distance from the metal frame 34 tends to be close) as in the above-described embodiment. ”Is provided at a position farther away from the metal frame 34 than the“ second portion ”, and thus is less affected by the metal frame 34 and good antenna characteristics can be obtained.

[Seventh to tenth modifications]
FIGS. 11-14 shows the 7th-10th modification of the film antenna 200 which concerns on this embodiment. The film antenna 200 of the seventh to tenth modifications is similar to the film antenna 200 of the above-described embodiment (FIG. 4B), and includes a flexible substrate 202 and a first conductor film 210 that functions as a first radiating element. A second conductor film 220 functioning as a second radiating element, a feeding portion (first feeding point P1 and second feeding point P2), a first conductor film 210, and a second conductor film 220. It is the antenna comprised including the short circuit part 240 which short-circuits.

  In the film antenna 200 of the seventh modification shown in FIG. 11, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) with their respective feeding points P1 and P2 facing each other. They are arranged side by side. At the upper end of the first conductive film 210, a protruding portion (branching portion) extending in a comb shape toward the upper side (Z-axis positive direction in the drawing) is provided. In addition, the second conductive film 220 is provided with a protruding portion (branching portion) extending in a comb shape downward (Z-axis negative direction in the drawing). The five comb-like protrusions of the first conductive film 210 are arranged in parallel, and the length of the protrusions is gradually increased from the left side to the right side (in the negative X-axis direction in the figure). Yes. A protruding portion that protrudes toward the second conductive film 220 is provided at the central portion of the lower end of the first conductive film 210, and the first feeding point P1 is provided in the protruding portion.

  Two comb-like protrusions of the second conductive film 220 are arranged in parallel, and the right protrusion is longer than the left protrusion. The left protrusion has a step at the tip, and the left end is the most convex, and the protrusion length gradually decreases toward the right end. The upper end of the second conductive film 220 is provided along the lower end of the first conductive film 210, and the upper end of the second conductive film 220 is provided at the lower end of the first conductive film 210. A recess having a shape into which the projected portion is fitted is formed, and a second feeding point P2 is provided at the bottom of the recess.

  Furthermore, in the film antenna 200 of the seventh modification, the band-like short-circuit portion 240 causes the left end portion of the tip portion of the leftmost protrusion portion of the comb-like protrusion portions of the first conductor film 210, and the second Of the comb-like projections of the conductor film 220, the left side of the tip of the projection located on the left is short-circuited.

  In the film antenna 200 of the eighth modification shown in FIG. 12, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) with their respective feeding points P1 and P2 facing each other. They are arranged side by side. The first conductive film 210 is provided with a protruding portion (branching portion) extending in a comb-tooth shape upward (Z-axis positive direction in the drawing). Three comb-like protrusions are provided, and the left protrusion is formed with a step at the tip, and the right end is the most convex, and the protrusion length gradually increases toward the left end. It is getting shorter. The most convex tip is higher than the central protrusion and lower than the right protrusion. The width of each protrusion (the length in the X-axis direction in the drawing) is wider in the order of the center protrusion, the right protrusion, and the left protrusion.

  The lower end of the first conductor film 210 has a protruding portion that protrudes toward the upper end (downward) of the second conductor film 220 at the center thereof, and the first feeding point P1 is formed in the protruding portion. Is provided. Further, the portion adjacent to the left side of the protruding portion protrudes toward the upper end (downward) of the second conductor film 220 from the portion adjacent to the right side of the protruding portion, and is between the strip-shaped short-circuit portion 240. A notch is formed at.

  At the lower end of the second conductor film 220, there are provided three steps having a downward protruding length that gradually increases from left to right. The rightmost protruding portion of the step portion is formed immediately below the right protruding portion of the comb-like protruding portions of the first conductor film 210, and in the protruding portion. A region adjacent to the first conductor film 210 is cut away. The width of the notched region in the X-axis direction in the drawing is smaller than the width of the right protrusion of the first conductor film 210 in the X-axis direction in the drawing. The upper end of the second conductor film 220 is formed with a recess shaped to fit the protrusion provided at the lower end of the first conductor film 210, and the second feeding point P2 is formed at the bottom of the recess. Is provided. A notch is provided downward between the concave portion and the convex portion on the left side. The convex portion on the right side of the concave portion protrudes upward from the convex portion on the left side of the concave portion. The left side portion of the convex portion on the left side of the concave portion is along the strip-shaped short-circuit portion 240, but the left-hand portion of the strip-shaped short-circuit portion 240 and the step portion provided on the lower side of the second conductor film 220 On the side where the step is connected, there is a portion that slightly protrudes toward the strip-shaped short-circuit portion 240 side (left side) and narrows the distance from the strip-shaped short-circuit portion 240.

  The strip-shaped short-circuit portion 240 includes a lower left end portion of the left protrusion portion of the first conductive film 210 and a left side portion of the left step among the step portions provided on the lower side of the second conductive film 220. Are connected.

  In the film antenna 200 of the ninth modification shown in FIG. 13, the first conductor film 210 and the second conductor film 220 are arranged in the vertical direction (Z-axis direction in the figure) with their respective feeding points P1 and P2 facing each other. They are arranged side by side. The first conductive film 210 is provided with a protruding portion (branching portion) extending in a comb-tooth shape upward (Z-axis positive direction in the drawing). There are four comb-shaped protrusions, and the second protrusion from the left has a step at the tip, and the right end is the most convex and the protrusion length toward the left end Is shorter. The most convex tip is the highest among the four comb-like protrusions. The protrusion length of each protrusion is the same for the rightmost protrusion and the second rightmost protrusion, the longest next to the most convex tip, and the leftmost protrusion. The width of each protrusion (the length in the X-axis direction in the figure) is such that the second protrusion from the left where the step is provided is the widest, followed by the rightmost protrusion, the leftmost protrusion, The width decreases in the order of the second protrusion from the right. The region at the lower end of the rightmost protrusion is cut away. The width of the cutout region in the X-axis direction in the drawing is smaller than the width of the rightmost protrusion in the X-axis direction in the drawing. Except for this notch region, the lower end of the first conductor film 210 extends linearly along the X-axis direction in the figure, and the first feeding point P1 is provided at the center of the lower end. . A strip-shaped short-circuit portion 240 is connected to the left end portion of the lower end of the first conductor film 210.

  The strip-shaped short circuit portion 240 short-circuits the left end portion of the lower end of the first conductor film 210 and the left end portion of the left end of the step portions provided at the lower end of the second conductor film 220. Yes.

  The upper end of the second conductor film 220 extends linearly along the lower end of the first conductor film 210 except for the right end, and the second feeding point P2 is provided at the center of the lower end. . At the right end of the upper end of the second conductor film 220, a protrusion located in a notch region provided at the right end of the lower end of the first conductor film 210 is formed, and the protrusion protrudes upward. . The left end of the upper end of the second conductor film 220 is along the strip-shaped short-circuit portion 240. A step portion is provided at the lower end of the second conductor film 220. The step is provided with a rightmost convex, a concave on the left side, a convex on the left side, and a concave with the left end cut out on the left side. The convex on the right is protruding downward. A rectangular through hole having a longitudinal direction in the vertical direction is provided above the concave on the left side of the rightmost convex.

  In the film antenna 200 of the tenth modified example shown in FIG. 14, the first conductor film 210 and the second conductor film 220 are generally in the vertical direction (Z-axis direction in the figure) with the feeding points P1 and P2 facing each other. Are arranged side by side. The first conductive film 210 is provided with a protruding portion (branching portion) extending in a comb-tooth shape upward (Z-axis positive direction in the drawing). Three comb-like projections are provided, and at the tip of each projection, the right projection is the uppermost, and the center projection and the left projection continue in this order. A belt-like short-circuit portion 240 is connected to the lower right portion of the right protrusion. The first conductor film 210 is cut out at the left end of the lower end, and the first feeding point P1 is provided above the cutout portion. A right end of the lower end of the first conductive film 210 forms a notch that is elongated in the upward direction between the strip-shaped short-circuit portion 240.

  A belt-like short-circuit portion 240 connected to the lower right portion of the right protrusion provided at the upper end of the first conductor film 210 is connected to the lower right portion of the second conductor film 220 and is short-circuited.

  The upper end of the second conductive film 220 is provided with a convex portion at the center so as to fit into a notch provided at the left end of the lower end of the first conductive film 210, and at the tip of the convex portion. A second feeding point P2 is provided. On the left side of the convex portion, another convex portion is provided with a notch extending downward, and the other convex portion projects upward from the central convex portion, and the right end thereof. The side is along the right end side of the first conductor film 210. Further, the left end side of the other convex portion is provided with a taper so as to widen the width along the X-axis direction of the second conductor film 220 in the drawing, and the taper shape is the same as that of the second conductor film 220. It terminates at the lower left corner. On the other hand, the right side of the central convex portion is along the lower end of the first conductor film 210, and the right end of the upper end of the second conductor film 220 is elongated downward from the belt-like short-circuit portion 240. An extended notch is formed. The lower end of the second conductor film 220 is bifurcated, and the right portion of the bifurcated portion projects downward from the left portion. In addition, the width of the right portion of the forked portion along the X-axis direction in the drawing is larger than the width of the first conductor film 210 along the X-axis direction in the drawing.

  Also in the film antennas 200 of the seventh to tenth modified examples, the first conductor film 210 and the second conductor film 220 arranged vertically are straight lines passing through the first feeding point P1 and the second feeding point P2. When divided into left and right by S, the first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220 configured on the right side of the straight line S are configured on the left side of the straight line S. A portion that radiates a lower frequency than the first b portion 210 b of the first conductor film 210 and the second b portion 220 b of the second conductor film 220 is configured. In the film antenna 200, the first conductor film 210 includes the first a portion 210a of the first conductor film 210 and the second conductor film 220 of the second conductor portion 220a. The portion 210b and the second conductor film 220 are disposed in a direction closer to the second planar portion 34B than the second b portion 220b of the second conductor film 220. As a result, the film antenna 200 radiates electromagnetic waves having a frequency lower than that of the “second portion” (that is, the effective distance from the metal frame 34 tends to be close) as in the above-described embodiment. ”Is provided at a position farther away from the metal frame 34 than the“ second portion ”, and thus is less affected by the metal frame 34 and good antenna characteristics can be obtained.

  In particular, in the film antenna 200 of the seventh to tenth modified examples, each protrusion including the point a1 and the point b1 constitutes a portion that radiates the lowest frequency in the use frequency band, and includes each of the points a2 and b2. The protrusion constitutes a portion that radiates the highest frequency in the use frequency band. As an example, each protrusion including the points a1 and b1 is a protrusion corresponding to the 800 MHz band, and each protrusion including the points a2 and b2 is a protrusion corresponding to the 2 GHz band. When the projection 110 including the point a1 and the point b1 is viewed in plan from the vehicle exterior side (Y axis positive side in the drawing) of the main portion 110 of the resin panel 100, the window guide 36 and the second plane portion 34B. Are disposed at positions overlapping with both of them (area overlapping the wind guide 36 in the area 110B). This can improve the lowest frequency radiation that needs to be further away from the metal due to the longer wavelength.

  In addition, in the film antenna 200 of the seventh to tenth modified examples, it can be regarded as an inverted F antenna having the short-circuit portion 240, but the first feeding point P1 is the starting point, and the second feeding point P2 is the ending point. The first conductive film 210, the short-circuit portion 240, and the second conductive film 210 can be regarded as a loop antenna formed by forming a loop.

[Eleventh Modification]
In the embodiment and each modification described above, the power feeding portion of the main portion 110 of the resin panel 100 is the window guide 36 when the main portion 110 is viewed from the outside of the vehicle (the Y axis positive side in the drawing). And in the region “non-overlapping region 110 </ b> A” that does not overlap any of the first planar portion 34 </ b> A. However, the essence of the present invention is the arrangement (orientation) of the conductor film of the antenna. Therefore, the arrangement position of the power feeding unit is not limited to the above-described aspect. Below, the aspect which does not ask | require the arrangement position of an electric power feeding part is demonstrated as an 11th modification.

  In the eleventh modification, a resin having a small dielectric loss tangent, specifically, a resin having a dielectric loss tangent of 0.67 or less is used as the material of the window guide 36 shown in FIG. Examples of a resin material having a dielectric loss tangent of 0.67 or less suitable for a window guide include TPE (Thermoplastic Elastomers) and EPDM (Ethylene Propylene Diene Monomer) having a sufficiently low carbon black content.

  As described above, by limiting the material of the window guide, even if the feeding portion of the film antenna is arranged so as to overlap the window guide, the gain of the film antenna 200 is not significantly reduced. In short, by limiting the material of the window guide as described above, it is possible to realize a film antenna having good antenna characteristics without limiting the position of the feeding portion.

  Also in the eleventh modification, as in the embodiment shown in FIG. 4, if the portion that radiates a low frequency in the used frequency band is arranged so as to be close to the second plane portion 34 </ b> B of the metal frame, the above-described case is achieved. Similar to the embodiment, good antenna characteristics can be exhibited.

  Note that the present invention is not limited to the eleventh modification but also applies to the above-described embodiments and modifications, but the essence of the present invention is the arrangement (direction) of the conductor film of the antenna. That is, as in the above-described embodiment, the first conductor film 210 is divided into the first a portion 210a and the first b portion 210b by the straight line S passing through the first feeding point P1 and the second feeding point P2, and the straight line When the second conductor film 220 is divided into the second a portion 220a and the second b portion 220b by S, the first conductor portion 210a of the first conductor film 210 included on one side across the straight line S is the first conductor portion 210a. The electrical length from the first feeding point P1 to the point a1 where the electrical length becomes the longest and the second feeding point P2 in the second a portion 220a of the second conductor film 220 included on the one side The first feeding point P1 in the first b portion 210b of the first conductor film 210 included on the other side of the straight line S with respect to the total value of the electrical length up to the point b1 where the electrical length is the longest. The point at which the electrical length from And the electrical length to the point b2 where the electrical length from the second feeding point P2 is longest in the second b portion 220b of the second conductor film 220 included on the other side. The total value is small. The direction of the film antenna 200 is such that one side (the first a portion 210a of the first conductor film 210 and the second a portion 220a of the second conductor film 220) sandwiching the straight line S is the other side (first conductor). A characteristic configuration is that the first b portion 210b of the film 210 and the second b portion 220b) of the second conductor film 220 are arranged in a direction closer to the second plane portion.

  Therefore, if this characteristic configuration is provided, the region 110B may have only a part of the conductor region on the right side of the straight line S and no remaining part. In addition, if the above-described characteristic configuration is provided, the region 110B may have a part of the conductor region on the left side of the straight line S.

[Summary]
As described above, the window frame according to the present invention is a window frame including a resin panel attached to the vehicle exterior side of a metal frame in which an opening for arranging a window is formed, and an antenna built in the resin panel. The metal frame includes a first flat surface portion located on the outer peripheral side of the opening and a second flat surface located on the inner peripheral side of the opening and closer to the vehicle compartment side than the first flat portion. And the antenna includes a first conductor pattern provided with a first feeding point and a second conductor pattern provided with a second feeding point, and the first feeding point is provided. When the antenna is divided into the first part and the second part by a straight line passing through the point and the second feeding point, the first of the points belonging to the first part in the first conductor pattern. 1 to the point where the electrical length from the feeding point becomes the longest More than the sum of the electrical length and the electrical length up to the point where the electrical length from the second feeding point is the longest among the points belonging to the first portion in the second conductor pattern. Among the points belonging to the second part in the first conductor pattern, the electrical length to the point where the electrical length from the first feeding point becomes the longest, and the second conductor pattern The total value of the electrical length from the second feeding point to the point where the electrical length from the second feeding point becomes the longest is small, and the direction of the antenna is The orientation is closer to the second planar portion than the second portion.

  According to said structure, since the said 1st part which radiates | emits the electromagnetic wave of a frequency lower than the said 2nd part can be spaced apart from a metal frame, a favorable antenna characteristic can be acquired.

  Further, in one form of the window frame according to the present invention, in addition to the above configuration, the first portion of the antenna is provided with a plurality of branch portions including a branch portion corresponding to the 800 MHz band, The second portion of the antenna may be provided with a plurality of branch portions including a branch portion corresponding to the 2 GHz band.

  According to the above configuration, the branch portion corresponding to the 800 MHz band is arranged farther from the metal frame than the branch portion corresponding to the 2 GHz band, thereby providing an antenna exhibiting good antenna characteristics. A window frame can be provided.

  In addition to the above configuration, one form of the window frame according to the present invention is provided with a plurality of branch portions in the first portion of the antenna, and the window frame is formed of the resin panel. A window guide fitted to the edge, further comprising a window guide for gripping the edge of the window, the window guide being arranged to face at least a part of the second plane portion; The antenna may be arranged such that a branch portion corresponding to the lowest frequency among the plurality of branch portions faces the window guide.

  With the above configuration, it is possible to improve the lowest frequency radiation that needs to be separated from the metal due to its long wavelength.

  In addition to the above configuration, one form of the window frame according to the present invention may be a loop antenna having the first feeding point and the second feeding point as a start point and an end point. .

  Alternatively, in addition to the above configuration, one form of the window frame according to the present invention is an inverted F antenna in which the first conductor pattern and the second conductor pattern are connected by a short-circuit portion. There may be.

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The present invention can be suitably used as a vehicle window frame mounted on a vehicle (mainly an automobile).

10 Window frame 20 Vehicle 30 Rear door 32 Rear window (window)
34 Door frame (metal frame)
34A First plane part 34B Second plane part 34C Inclined surface 36 Wind guide 100 Resin panel (window frame main body)
DESCRIPTION OF SYMBOLS 110 Main part 110A Non-overlapping area | region 110B area | region 112 Internal space 120 Door frame support part 130 Holding | maintenance part 140 Extension part 200 Film antenna (antenna)
210 First conductor film (first conductor pattern)
210a 1a part (first part)
210b 1b part (second part)
220 Second conductor film (second conductor pattern)
220a 2a part (first part)
220b Second part (second part)
240 Short-circuit part 250 Annular conductor film (loop antenna)

Claims (5)

In a window frame comprising a resin panel attached to the outside of a metal frame in which an opening for arranging a window is formed, and an antenna built in the resin panel,
The metal frame includes a first flat portion located on the outer peripheral side of the opening, and a second flat portion located on the inner peripheral side of the opening and closer to the vehicle compartment side than the first flat portion. Have
The antenna has a first conductor pattern provided with a first feeding point, and a second conductor pattern provided with a second feeding point,
When the antenna is divided into a first part and a second part by a straight line passing through the first feeding point and the second feeding point, the first part in the first conductor pattern Of the points belonging to the first feeding point, the electrical length to the point where the electrical length from the first feeding point becomes the longest, and the second feeding among the points belonging to the first part in the second conductor pattern The electrical length from the first feeding point among the points belonging to the second portion in the first conductor pattern, rather than the total value with the electrical length up to the point where the electrical length from the point becomes the longest. The electrical length up to the point where the length becomes the longest and the point up to the point where the electrical length from the second feeding point becomes the longest among the points belonging to the second portion in the second conductor pattern. The total value with the electrical length is small,
The antenna is oriented such that the first portion is closer to the second planar portion than the second portion.
A window frame characterized by that. The first portion of the antenna is provided with a plurality of branch portions including a branch portion corresponding to the 800 MHz band,
The window frame according to claim 1, wherein the second portion of the antenna is provided with a plurality of branch portions including a branch portion corresponding to a 2 GHz band. The first portion of the antenna is provided with a plurality of branches.
The window frame is a window guide fitted to the edge of the resin panel, further comprising a window guide for gripping the edge of the window,
The window guide is arranged to face at least a part of the second plane portion, and the antenna has a branch portion corresponding to the lowest frequency among the plurality of branch portions facing the window guide. The window frame according to claim 1, wherein the window frame is arranged so as to. The window frame according to any one of claims 1 to 3, wherein the antenna is a loop antenna having a first feeding point and a second feeding point as a start point and an end point. The window according to any one of claims 1 to 3, wherein the antenna is an inverted F antenna in which the first conductor pattern and the second conductor pattern are connected by a short-circuit portion. flame.

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