JP2006222528A - Mobile wireless apparatus and antenna system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of reducing deterioration in an antenna characteristic by preventing a finger or the like of a user from approaching a short-circuit conductor and a feeding conductor. <P>SOLUTION: An antenna housing 32 of an antenna system 15 includes a first plane on which a radiation conductor 38 is arranged, a second plane on which a ground conductor 35 is arranged, and a third plane on which the short-circuit conductor 36 and the feed conductor 37 are arranged, in a way of being nestled close to a concaved part 40 that is concaved inwardly. The antenna system 15 is arranged inside the housing 31 of a mobile phone terminal 1 and at one end of the housing 31 in the length direction. When a user 20 uses the mobile phone terminal 1 for the purpose of calls or the like, even if a finger 22 of the user 20 touches an end of the housing 31, the distance between the finger 22 and the short-circuit conductor 36 and the ground conductor 35 of the antenna system 15 is maintained to be located by some distance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable wireless device such as a cellular phone terminal provided with an antenna formed by attaching a conductor to a flexible dielectric, for example, and the antenna device.

  An example of a portable wireless device including a conventional antenna device 115 configured by attaching a conductor to a flexible dielectric is shown in FIGS. Here, a mobile phone terminal 130 is cited as an example of a mobile wireless device including the antenna device 115, and FIG. 16 shows an outline of the mobile phone terminal 130 in a state in which the user 120 is using a phone call or the like. 17 to 19 show schematic external views of a part of the antenna device 115 and the circuit board 133 provided in the mobile phone terminal 130, and FIG. 20 shows the antenna device. The figure which expanded the principal part of 115 is shown. However, in FIG. 16 to FIG. 20, illustration of each component included in a general mobile phone terminal such as a display device and a key device is omitted.

  As shown in FIG. 20, the antenna device 115 includes a ground conductor 135, a short-circuit conductor 136, and a feed conductor 137 on a sheet-shaped dielectric 139 made of a flexible resin such as polyethylene terephthalate (PET). , And a flexible antenna in which a conductive portion such as a radiating conductor 138 is formed by a copper foil pattern, for example, and an antenna housing 132 formed by a resin such as acrylonitrile butadiene styrene (ABS) as shown in FIGS. It is configured. The antenna housing 132 has, for example, a three-dimensional shape in which one surface is, for example, arcuate and the remaining five surfaces are planar. The flexible antenna is formed on the arcuate surface portion of the antenna housing 132. The short-circuit conductor 136 and the power supply conductor 137 are positioned, the ground conductor 135 is positioned on one side of two rectangular surface portions parallel to each other with the arc-shaped surface portion interposed therebetween, and the radiation conductor 138 is positioned on the other side. The antenna housing 132 is attached with, for example, a double-sided tape.

  In the antenna device 115, as shown in FIG. 20, the feeding conductor 137 is connected to a communication circuit (not shown) on the circuit board 133 via the center conductor 143 of the coaxial line 141, and the ground conductor 135 is connected to the coaxial line. The circuit board 133 is electrically connected to the ground 134 of the circuit board 133 or a shield case (not shown) through the outer conductor 144 of the terminal 141 at a high frequency.

  In Japanese Patent Laid-Open No. 7-94930 (Patent Document 1), a flexible antenna is used in which a flexible printed board having excellent flexibility is used and an element having a split line disposed thereon is coated with a coating member. There is disclosed a mobile phone equipped with the above. According to this flexible antenna, since the split line is a bent line, the antenna can be bent and reduced in size.

Japanese Patent Laid-Open No. 7-94930 (FIG. 1)

  By the way, when the antenna device 115 is mounted on the cellular phone terminal 130 or the like, as shown in FIG. 20, the ground conductor 135 is electrically connected to the ground 134 of the circuit board 133, the shield case, or the like at high frequency to In general, the antenna characteristic is improved by increasing as much as possible, and the desired antenna characteristic is obtained by setting the distance between the radiation conductor 138 and the ground conductor 135 to a predetermined distance. Further, when the antenna device 115 is disposed in the housing 131 of the mobile phone terminal 130, the antenna device 115 is disposed near one end in the longitudinal direction of the housing 131 as shown in FIG. Is generally arranged.

  For this reason, when the antenna device 115 is provided in the housing 131 of the mobile phone terminal 130, the feeding conductor 137 and the short-circuit conductor 136 of the antenna device 115 are portable as shown in FIG. It will be close to one end in the longitudinal direction of the casing 131 of the telephone terminal 130. Then, in an actual use state where the user 120 places the mobile phone terminal 130 on the ear 121 and makes a call or the like, for example, the finger 122 of the user 120 is placed on the longitudinal end of the casing 131 of the mobile phone terminal 130. In this case, the finger 122 of the user 120 and the short-circuit conductor 136 and the feed conductor 137 of the antenna device 115 are very close to each other.

  On the other hand, in the case of a planar antenna in which conductive patterns such as the ground conductor 135, the short-circuit conductor 136, the feed conductor 137, and the radiation conductor 138 are formed on the sheet-shaped dielectric 139 as in the antenna device 115 described above, the feed conductor 137. In addition, high-frequency current tends to concentrate on the short-circuit conductor 136 portion.

  Therefore, in the actual use state where the user 120 makes a call or the like with the user 120 putting the mobile phone terminal 130 on the ear 121, for example, the finger 122 of the user 120 is placed at the longitudinal end of the casing 131 of the mobile phone terminal 130. As a result, when the finger 122 is close to the power supply conductor 137 and the short-circuit conductor 136, the antenna characteristics are more deteriorated than when the finger 122 is close to the radiation conductor 138 having a relatively large area.

  The present invention has been proposed in view of such circumstances, and a portable radio capable of preventing a user's finger or the like from approaching a short-circuit conductor or a power supply conductor and reducing deterioration of antenna characteristics. An object is to provide a device and an antenna device.

  The portable radio apparatus according to the present invention includes a radiation conductor disposed on a first plane, a ground conductor disposed on a second plane parallel to the first plane at a predetermined distance, and a first conductor Provided on the third surface in contact with the plane and the second plane and disposed along the concave portion recessed toward the inside, and connected to the short-circuit conductor connecting the radiation conductor and the ground conductor, and along the concave portion on the third surface Antenna means having a power supply conductor for supplying power to the radiation conductor, a circuit board having a ground which is electrically connected to the ground conductor of the antenna means in high frequency, and the antenna means and the circuit board are housed inside In addition, the above-described problem is solved by having a housing in which the antenna means is arranged on one end side in the longitudinal direction.

  In addition, the antenna device of the present invention includes a radiating conductor arranged on the first plane, a ground conductor arranged on a second plane parallel to the first plane at a predetermined distance, Provided on the third surface in contact with the second plane and the second plane and disposed along the concave portion recessed toward the inner side, along with the short-circuit conductor connecting the radiation conductor and the ground conductor, and along the concave portion on the third surface The above-described problem is solved by having a power supply conductor for supplying power to the radiation conductor.

  In other words, according to the present invention, the antenna device is configured to route the short-circuit conductor and the power supply conductor where current concentrates along the concave portion recessed toward the inside, so that the antenna device is housed inside the housing. For example, even when the user holds the portable radio terminal in his / her hand, the distance between the finger of the user's hand and the feeding conductor and the short-circuit conductor can be sufficiently secured.

  In the present invention, since the antenna device configured to route the short-circuit conductor and the feed conductor where current is concentrated along the concave portion recessed toward the inside is used, the user's finger or the like is used as the short-circuit conductor or the feed conductor. Proximity can be prevented and deterioration of antenna characteristics can be reduced.

  Hereinafter, a cellular phone terminal will be described as an example of the portable wireless device and the antenna device of the present invention with reference to the drawings. In the present embodiment, a mobile phone terminal is taken as an example, but it goes without saying that the contents described here are merely examples, and the present invention is not limited to this example.

[Schematic configuration of mobile phone terminal]
FIG. 1 shows a schematic external configuration example of the mobile phone terminal 1 of the present embodiment.

  The cellular phone terminal 1 of the present embodiment includes, for example, a display 3 constituted by a liquid crystal device, a speaker 5 for reception, a numeric keypad (12 keys) 4 that is a key button for inputting a telephone number, characters, and the like, an utterance key, Cross key device 8 having a clear key, each key such as a call end / power key, a determination button 9 pressed when a menu is operated, and instruction keys 11 provided on the upper, lower, left, and right of the button 9, for transmission Microphone 7 or the like. Although not shown, the camera unit on the back side of the casing of the mobile phone terminal 1 of the present embodiment (the back side with respect to the liquid crystal display 3 side) A photographing auxiliary light that emits auxiliary light is provided.

  The circuit configuration normally provided in the mobile phone terminal according to the present embodiment and other configurations are not shown and described.

[Antenna Device of First Embodiment]
2 to 6 show a schematic configuration of the antenna device 15 according to the first embodiment of the present invention incorporated in the mobile phone terminal 1 of FIG.

  2 shows a schematic cross section of the cellular phone terminal 1 in use by the user 20, and FIGS. 3 to 5 show the antenna device 15 provided in the cellular phone terminal 1. A schematic external view of a part of the circuit board 33 is shown, and FIG. 6 is a developed view of the main part of the antenna device 15. However, in FIG. 2 to FIG. 6, illustrations of other components included in a general mobile phone terminal such as a display device and a key device are omitted.

  As shown in FIG. 6, the antenna device 15 according to the first embodiment of the present invention has a ground conductor 35 on a sheet-shaped dielectric 39 made of a flexible resin such as polyethylene terephthalate (PET). , A short-circuit conductor 36, a feeding conductor 37, a radiating conductor 38, and the like, and a flexible antenna having a copper foil pattern, for example, and a resin such as acrylonitrile butadiene styrene (ABS) as shown in FIGS. The antenna housing 32 is formed.

  As shown in FIGS. 2 to 5, the antenna housing 32 has, for example, a three-dimensional shape in which one surface is a concave shape 40 and the remaining five surfaces are flat. The short-circuit conductor 36 and the power feeding conductor 37 are positioned on the surface portion of the concave shape 40 of the antenna housing 32, and the ground conductor 35 is positioned on one side of two rectangular surface portions parallel to each other with the surface portion of the concave shape 40 interposed therebetween. The radiation conductor 38 is positioned on the other side, and is attached to the antenna housing 32 with, for example, a double-sided tape.

  In addition, since the antenna housing 32 of this embodiment is what a flexible antenna is affixed to, the surface part of the said concave shape 40 and the said ground conductor 35, so that the copper foil part of the said flexible antenna may not bend. A predetermined curvature (so-called R) is provided at a connection portion with the both surface portions where the radiation conductor 38 is disposed.

  As shown in FIG. 6, the antenna device 15 includes a feeder conductor 37 connected to a communication circuit (not shown) on the circuit board 33 through a central conductor 43 of the coaxial line 41, and a ground conductor 35 having a coaxial line. The circuit board 33 is electrically connected to the ground 34 of the circuit board 33 and a shield case (not shown) through the outer conductor 44 of the circuit 41 at a high frequency.

  In the present embodiment, as shown in FIG. 6, the ground conductor 35 is electrically connected to the ground 34 of the circuit board 33, the shield case, and the like at high frequency to increase the antenna ground conductor area as much as possible. In addition to the improvement, a desired antenna characteristic is obtained by setting the distance between the radiating conductor 38 and the ground conductor 35 to a predetermined distance. Further, as shown in FIG. 2, the antenna device 15 is disposed in the vicinity of one end in the longitudinal direction of the casing 31 of the mobile phone terminal 1. For this reason, in the housing 31 of the mobile phone terminal 1, the antenna device 15 according to the present embodiment includes a power supply conductor 37 and a short-circuit conductor 36 as shown in FIG. 2. It is distribute | arranged so that it may be located in the vicinity of one edge part of the longitudinal direction.

  Here, in the actual use state in which the user 20 puts the mobile phone terminal 1 having such a configuration on the ear 21 and makes a call or the like, for example, the finger 22 of the user 20 extends in the longitudinal direction of the casing 31 of the mobile phone terminal 1. When placed at the end, the finger 22 of the user 20 is in close proximity to the short-circuit conductor 36 and the feed conductor 37 of the antenna device 15. Further, as in the antenna device 15 described above, in the case of a planar antenna in which conductive patterns such as the ground conductor 35, the short-circuit conductor 36, the feed conductor 37, and the radiation conductor 38 are formed on the dielectric sheet, the feed conductor 37 and the short-circuit conductor 36 are used. There is a tendency that high-frequency current tends to concentrate on the portion. Therefore, when the finger 22 is close to this portion, for example, the antenna characteristics are deteriorated as compared with the case where the finger 22 is close to the radiation conductor 38 having a relatively large area. .

  However, in the case of the antenna device 15 of this embodiment, as shown in FIGS. 2 to 5, the short-circuit conductor 36 and the feed conductor 37 of the flexible antenna are attached so as to follow the concave shape 40 of the antenna housing 32. Therefore, the distance between the finger 22 and the short-circuit conductor 36 and the power supply conductor 37 is farther than that of the above-described example of FIG. That is, according to the antenna device 15 of the present embodiment, the feeding conductor 37 and the short-circuit conductor 36 where current is concentrated can be separated from the finger 22 of the user 20, and the influence of the human body on the antenna characteristics can be reduced. Thus, it is possible to suppress the deterioration amount of the antenna characteristics as compared with the case of the conventional antenna apparatus shown in the example of FIG.

  Furthermore, according to the present embodiment, the antenna device 15 can be configured only by being attached to the antenna housing 32 without adding any processing to the flexible antenna, so that the workability at the time of manufacturing the antenna device may be impaired. Absent.

[Antenna Device of Second Embodiment]
7 to 10 show a schematic configuration of the antenna device 16 according to the second embodiment of the present invention built in the mobile phone terminal 1 of FIG.

  8 to 9 show schematic external views of a part of the antenna device 16 and the circuit board 33 provided in the mobile phone terminal 1, and FIG. 10 shows the antenna of the second embodiment. The figure which expanded the principal part of the apparatus 16 is shown. In the second embodiment, a schematic cross-sectional view in a state where the user 20 is using the mobile phone terminal 1 of the present embodiment is omitted. In FIG. 7 to FIG. 10, illustrations of other components included in a general mobile phone terminal such as a display device and a key device are omitted.

  In the second embodiment, the basic parts such as the material of the flexible antenna of the antenna device 16 and the conductor patterns are the same as those in the first embodiment, and the common parts are the same as those in the first embodiment. The description is omitted by using the same reference numerals as the respective instruction codes, and only the differences will be described here.

  In the antenna device 15 according to the second embodiment of the present invention, as shown in FIGS. 7 to 9, the antenna housing 50 has, for example, one surface having arc shapes 52 and 53 and a part thereof having a concave shape 51, and the rest. It has a three-dimensional shape with five sides made flat.

  On the other hand, as shown in FIG. 10, the flexible antenna is provided at a position sandwiching the short-circuit conductor 36 and the power supply conductor 37, and at the same time, has a notch having substantially the same length as the length of the short-circuit conductor 36 and the power supply conductor 37 in the longitudinal direction. The portions 46 and 47 are provided, and the short-circuit conductor 36 and the power supply conductor 37 are separated from the dielectric portions on both sides by the cut portions 46 and 47.

  In the flexible antenna, the short-circuit conductor 36 and the power supply conductor 37 are attached so as to follow the surface portion of the concave shape 51 of the antenna housing 32, and dielectrics on both sides of the short-circuit conductor 36 and the power supply conductor 37 are attached. The ground conductor 35 is pasted on one side of two rectangular surface portions parallel to each other with the surface portions of the arc shapes 52 and 53 and the concave shape 51 sandwiched between the arc portions 52 and 53 and the surface portions of the concave shapes 51. The radiation conductor 38 is attached to the other side.

  In addition, since the antenna housing 50 of this embodiment is what a flexible antenna is affixed to, the surface part of the said circular arc shape 52,53 and the concave shape 51 so that the copper foil part of the said flexible antenna may not bend. A predetermined curvature (so-called R) is provided at a connection portion between the ground conductor 35 and the radiation conductor 38 and both surface portions where the radiation conductor 38 is disposed.

  In the case of the present embodiment, the short-circuit conductor 36 and the power supply conductor 37 and the dielectric portions on both sides of the short-circuit conductor 36 and the power supply conductor 37 are separated by the cut portions 46 and 47. 36 and the feeding conductor 37 are pasted along the concave 51 portion, and the dielectric portions on both sides thereof are pasted along the circular arc 52 and 53 portions. The housing 50 is formed so that the developed length of the arcs 52 and 53 and the developed length of the concave shape 51 are the same.

  Also in the antenna device 16 of the second embodiment, as in the case of the first embodiment described above, the flexible antenna short-circuit conductor 36 and the feeding conductor 37 are attached so as to follow the concave shape 51 of the antenna housing 50. Since there is no conductor in the arc-shaped portions 52 and 53 of the antenna housing 50, when the mobile phone terminal is actually used, the finger 22 of the user 20, the short-circuit conductor 36, and the power feed The distance from the conductor 37 is farther than the example shown in FIG.

  Therefore, according to the antenna device 16 of the second embodiment, the current-concentrated feeding conductor 37 and the short-circuit conductor 36 can be separated from the finger 22 of the user 20, and the influence of the human body on the antenna characteristics can be reduced. It is possible to suppress the deterioration amount of the antenna characteristics as compared with the conventional antenna device shown in the example of FIG.

  Further, in the case of the antenna device 16 of the second embodiment, both sides of the concave shape 51 portion of the antenna housing 50 are the arc shapes 52 and 53, and the arc shapes 52 and 53 are the housings of the mobile phone terminal 1. The shape of the inner wall surface of the body 31 substantially coincides with and substantially in contact with the inner wall surface, and the arcs 52 and 53 are configured to support the casing 31 of the mobile phone terminal 1 from the inside. Therefore, for example, it is possible to achieve a high impact strength against a drop impact of the mobile phone terminal 1 and to have an advantage of suppressing the occurrence of the housing damage.

[Antenna Device of Third Embodiment]
The first and second antenna devices described above are exemplified by so-called inverted F antennas, but the antenna device of the present invention can also be applied to loop antennas as shown in FIGS. 11 to 13 below. . In the examples of FIGS. 11 to 13, the same components as those in FIG. 6 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 11 shows an example of a flexible antenna having a so-called single-band loop antenna configuration. In the flexible antenna shown in FIG. 11, conductive portions such as a ground conductor 35, a short-circuit conductor 36, a feed conductor 37, and a loop-shaped radiation conductor 61 are formed on the dielectric 39 by, for example, a copper foil pattern.

  FIG. 12 shows an example of a flexible antenna having a single-band loop antenna configuration. The flexible antenna shown in FIG. 12 is an example in which the loop length of the radiating conductor portion is made longer than that in FIG. 11. A conductive portion such as the radiation conductor 62 is formed by a copper foil pattern, for example.

  FIG. 13 shows an example of a flexible antenna having a so-called dual-band loop antenna configuration. In the flexible antenna shown in FIG. 13, conductive portions such as a ground conductor 35, a short-circuit conductor 36, a feed conductor 37, and a loop-shaped radiation conductor 63 are formed on a dielectric 39 by, for example, a copper foil pattern.

  The flexible antennas shown in FIGS. 11 to 13 are attached to the antenna housing 32 of the first embodiment, for example, in the same manner as described above. Also in these third embodiment examples, similarly to the first embodiment described above, the antenna device can be configured only by being attached to the antenna housing 32 without adding any processing to the flexible antenna. Therefore, workability at the time of manufacturing the antenna device is not impaired. Of course, similarly to the example of the second embodiment described above, the notches 46 and 47 are provided so as to sandwich the short-circuit conductor 36 and the power supply conductor 37, and are attached to the antenna housing 50 of the second embodiment in the same manner as described above. You may make it.

[Comparison between concave shape variation and antenna characteristics]
Hereinafter, the relationship between the depth of the concave shape (variation amount V) and the deterioration amount of the antenna characteristics in the antenna devices of the first and second embodiments of the present invention will be described with reference to FIGS.

  FIG. 14 shows a state in which the finger 22 is brought close to a general inverted F antenna (FIG. 14A) and the antenna 22 described in this embodiment of the present invention (FIG. 14B). FIG. 15 schematically shows the depth of the concave shape (variation amount V, that is, the distance between the finger 22 and the antenna) and antenna characteristics in the antenna device of the embodiment of the present invention. It shows the relationship with the amount of degradation.

  Here, when the antenna length A is, for example, 100 mm, the distance B between the ground conductor and the radiation conductor is, for example, 15 mm, and the used frequency band is 1 GHz, the above-described variation amount V is approximately 0 mm. When the finger 22 and the antenna are substantially in contact with each other as shown in FIG. 14 (a), the degradation amount of the antenna characteristic is 0.7 dB as shown in FIG.

  On the other hand, when the amount of variation V (depth of the concave shape) is, for example, 1 mm, that is, when the finger 22 and the antenna are separated by, for example, 1 mm in FIG. Thus, the degradation amount of the antenna characteristic is 0.3 dB. Similarly, if the variation amount V is 2 mm, for example, that is, if the distance between the finger 22 and the antenna is 2 mm in FIG. 14B, for example, the degradation amount of the antenna characteristic is as shown in FIG. It becomes about 0.25 dB. Further, when the variation amount V is, for example, 3 mm, that is, when the finger 22 and the antenna are separated by, for example, 3 mm in FIG. 14B, the degradation amount of the antenna characteristics is 0 as shown in FIG. .2 dB.

  As can be seen from these facts, as the distance between the finger 22 and the antenna (variation amount V) increases, the deterioration amount of the antenna characteristics decreases. Therefore, in the antenna device of the above-described embodiment of the present invention as shown in FIG. 14B, compared with the general antenna shown in FIG. It can be seen that it can be reduced.

  The above description of the embodiment is an example of the present invention. Therefore, the present invention is not limited to the above-described embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea according to the present invention. .

  In the above-described embodiment, the inverted F antenna and the loop antenna have been described as examples. However, the present invention can be applied to a so-called monopole antenna or the like, and the type of antenna is not limited in the present invention.

  The antenna housing can be made of various materials such as not only ABS resin but also resin such as polycarbonate (PC) or ceramic material, and any material can be used in the present invention. Similarly, the dielectric on which the copper foil conductor pattern is formed is not limited to PET resin, and for example, polyimide resin can be used. In the present invention, any material can be used.

  Moreover, although the example which connects a coaxial line with respect to an electric power feeding conductor was shown in the said embodiment, you may make it connect a split line, for example.

  Furthermore, the ground conductor of the antenna device may not be integrated with the flexible antenna as in the above-described embodiment, and may be directly connected to the ground or shield case of the circuit board.

  In the above-described embodiment, a straight type mobile phone terminal has been described as an example, but a so-called folding type, rotary open type, and slide type mobile phone terminal may be used.

  Furthermore, the mobile wireless device in which the antenna device of the embodiment of the present invention is built is not limited to the mobile phone terminal, and may be another wireless terminal.

1 is a schematic external view of a mobile phone terminal according to an embodiment. It is a schematic sectional drawing of the mobile telephone terminal of this embodiment in the state currently used by the user. 1 is a schematic perspective view of an antenna device and a part of a circuit board provided in a mobile phone terminal according to a first embodiment when viewed from the side surface side. It is the schematic perspective view which looked at the antenna apparatus and a part of circuit board with which it was equipped in the mobile telephone terminal of 1st Embodiment from the top | upper surface side. It is a schematic side view of a part of an antenna device and a circuit board provided in the mobile phone terminal of the first embodiment. It is the figure which expanded the principal part of the antenna device of 1st Embodiment. It is the schematic perspective view which looked at the antenna apparatus and a part of circuit board with which it was equipped in the mobile telephone terminal of 2nd Embodiment from the side surface side. It is the schematic perspective view which looked at the antenna apparatus and a part of circuit board with which it was equipped in the mobile telephone terminal of 2nd Embodiment from the top | upper surface side. It is a schematic side view of a part of an antenna device and a circuit board provided in the mobile phone terminal of the second embodiment. It is the figure which expanded the principal part of the antenna device of 2nd Embodiment. It is the figure which expand | deployed the principal part of the antenna device made into the single band loop antenna structure in 3rd Embodiment. In 3rd Embodiment, it is the figure which expand | deployed the principal part of the antenna apparatus which is a single band loop antenna and has a long loop length. It is the figure which expand | deployed the principal part of the antenna device made into the dual band loop antenna structure in 3rd Embodiment. It is a figure showing typically the state where a finger was brought close to a general inverted F antenna, and a state where a finger was brought close to an antenna device of an embodiment of the present invention. It is a figure which shows the relationship between the depth (variation amount) of the concave shape of the antenna apparatus of this invention embodiment, and the degradation amount of an antenna characteristic. It is a schematic sectional drawing of the conventional mobile telephone terminal of the state used by the user. It is the schematic perspective view which looked at the antenna apparatus with which the conventional mobile telephone terminal was equipped, and a part of circuit board from the side surface side. It is the schematic perspective view which looked at the antenna apparatus with which the conventional mobile telephone terminal was equipped, and a part of circuit board from the top | upper surface side. It is a schematic side view of a part of an antenna device and a circuit board provided in a conventional mobile phone terminal. It is the figure which expanded the principal part of the conventional antenna device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Cellular phone terminal, 3 Liquid crystal display, 4 Numeric keypad, 5 Speaker, 7 Microphone, 8 Cross key device, 9 Decision button, 11 Instruction key, 15 Antenna apparatus of 1st Embodiment, 16 Antenna apparatus of 2nd Embodiment , 20 users, 21 ears, 22 fingers, 31 housing, 32, 50 antenna housing, 33 circuit board, 34 ground, 35 ground conductor, 36 short-circuit conductor, 37 feeding conductor, 38, 61, 62, 63 radiation conductor, 39 , 49 Dielectric, 40, 51 Concave, 41 Coaxial line, 43 Center conductor, 44 Outer conductor, 46, 47 Notch, 52, 53 Arc shape

Claims (8)

A radiation conductor disposed on the first plane; a ground conductor disposed on a second plane parallel to the first plane by a predetermined distance; and the first plane and the second plane. And a short-circuit conductor connecting the radiation conductor and the ground conductor, and being arranged along the concave portion of the third surface. Antenna means having a feed conductor for feeding to the radiation conductor;
A circuit board having a ground which is electrically connected to the ground conductor of the antenna means at a high frequency;
A portable radio terminal characterized in that the antenna means and the circuit board are housed inside and a housing in which the antenna means is disposed on one end side in the longitudinal direction. The portable wireless terminal according to claim 1, wherein
The antenna means is in contact with the first plane, a second plane parallel to the first plane at a predetermined distance, and is in contact with the first plane and the second plane and is recessed toward the inside. A non-conductive support member having at least a third surface having a recess, the radiation conductor is disposed on the first plane of the non-conductive support member, and the non-conductive support member A portable radio terminal characterized in that the ground conductor is disposed on two planes, and the short-circuit conductor and the feeding conductor are disposed along a recess on the third surface of the non-conductive support member. The portable wireless terminal according to claim 2, wherein
In the non-conductive support member, the connecting portion between the first plane and the third surface, the connecting portion between the second plane and the third surface, and the concave portion of the third surface each have a curvature. Configured with
The antenna means includes a flexible member in which conductive patterns respectively forming the radiation conductor, the ground conductor, the short-circuit conductor, and the feeding conductor are formed on a flexible dielectric sheet. A portable wireless terminal comprising a conductive support member and an adhesive. The portable wireless terminal according to claim 3, wherein
The non-conductive support member includes an arc portion that bulges to the outside on the third surface and the recess that is recessed to the inside.
The flexible member is provided with notches in the both sides of the short-circuit conductor and the power supply conductor in the same direction as the longitudinal direction of the short-circuit conductor and the power supply conductor and approximately the same length as the length of the short-circuit conductor and the power supply conductor. A portable wireless terminal, wherein at least the short-circuit conductor and the feeding conductor are attached along the concave portion of the non-conductive member. A radiation conductor disposed on the first plane;
A ground conductor disposed on a second plane parallel to the first plane by a predetermined distance;
A short-circuit conductor provided on a third surface in contact with the first plane and the second plane and disposed along a recess recessed toward the inside, and connecting the radiation conductor and the ground conductor;
An antenna device comprising: a power supply conductor for supplying power to the radiation conductor and being arranged along the concave portion of the third surface. The antenna device according to claim 5, wherein
A third plane having a first plane, a second plane parallel to the first plane at a predetermined distance, and a recess in contact with the first plane and the second plane and recessed toward the inner side; A non-conductive support member comprising at least a surface of
The radiation conductor is disposed on the first plane of the non-conductive support member, the ground conductor is disposed on the second plane of the non-conductive support member, and the non-conductive support member The antenna device, wherein the short-circuit conductor and the feeding conductor are arranged along the concave portion on the third surface. The antenna device according to claim 6, wherein
In the non-conductive support member, the connecting portion between the first plane and the third surface, the connecting portion between the second plane and the third surface, and the concave portion of the third surface each have a curvature. Configured with
The conductive pattern that forms the radiation conductor, the ground conductor, the short-circuit conductor, and the feeding conductor, respectively, has a flexible member formed on a flexible dielectric sheet,
An antenna device, wherein the flexible member is configured to be affixed onto the non-conductive support member. The antenna device according to claim 7, wherein
The non-conductive support member includes an arc portion that bulges to the outside on the third surface and the recess that is recessed to the inside.
The flexible member is provided with notches in the both sides of the short-circuit conductor and the power supply conductor in the same direction as the longitudinal direction of the short-circuit conductor and the power supply conductor and approximately the same length as the length of the short-circuit conductor and the power supply conductor. An antenna device, wherein at least the short-circuit conductor and the feeding conductor are attached along the concave portion of the non-conductive member.

Images