WO2012160820A1

WO2012160820A1 - Portable wireless device

Info

Publication number: WO2012160820A1
Application number: PCT/JP2012/003380
Authority: WO
Inventors: 真悟角; 中西　英夫; 弘准菊地; 鈴木　雄一郎; 金崎　善宏
Original assignee: パナソニック株式会社
Priority date: 2011-05-25
Filing date: 2012-05-24
Publication date: 2012-11-29
Also published as: JP2012248947A

Abstract

A portable wireless device (100) comprises: a display unit (120) which is disposed to be visible from a first face of a casing (110); a first antenna (150) which is positioned below the display unit (120) on the first face side of the casing (110); and a grounding line (160) which is positioned below the display unit (120) on the side opposite the first antenna in the width direction of the display unit (120). The portable wireless device (100) further comprises: a circuit substrate (130); a reactance element (161) which is disposed between the grounding line (160) and the circuit substrate (130); and a passive element (170) which is positioned below the display unit (120) on a second face which is opposite the first face of the casing (110).

Description

Portable wireless device

The present invention relates to a portable radio apparatus such as a mobile phone, and more particularly to a portable radio apparatus including a single housing such as a bar structure (straight structure) or a card type.

Mobile wireless devices such as cellular phones are becoming smaller and more multifunctional, and as one of the recent multifunctional functions, antennas are being built in to improve design.

In addition, portable wireless devices such as mobile phones prevent deterioration of antenna sensitivity by increasing the distance between the antenna and the human body.

In a portable wireless device having a bar structure such as a smart phone, it is a mainstream to arrange a cellular antenna at the bottom portion in order to secure a distance from a human head and a mounting volume during a call.

Also, in the clamshell slide structure, when antenna elements are placed on the hinge, changes in the structure around the hinge (hinge conductor shape, upper and lower board connection lines, etc.) greatly affect antenna performance. An antenna may be arranged.

Patent Document 1 describes a wireless device including a touch panel including a display device and a touch sensor. In the wireless device described in Patent Document 1, the third antenna element is disposed on the opposite side of the touch sensor in a cross-sectional view at a position that is not hidden by the touch sensor at the bottom of the housing. This suppresses the influence of a touch sensor and tries to ensure antenna characteristics.

In Patent Document 2, the first and second antenna portions arranged in the casing are switched and used according to the communication mode during communication, and the antenna sensitivity is reduced by increasing the distance between the antenna and the human body. A portable radio that ensures good communication is described.

JP 2010-239211 A JP 2003-163958 A

In a terminal having a bar structure equipped with a large display unit typified by such a smart phone, the antenna is generally provided at the lower end of the housing from the viewpoint of the influence from the human head during the call and the mounting volume. It is preferable to arrange.

However, since the lower end of the casing is the position that is most easily held by hand, regardless of the usage form, securing antenna performance when holding the casing by hand becomes a problem.

In the wireless device described in Patent Document 1, the influence of the hand is not assumed, and when the periphery of the antenna placement portion is held by hand, the antenna characteristics cannot be ensured.

The portable wireless device described in Patent Document 2 ignores the possibility that the lower end is covered with a hand during a call, and the antenna characteristics cannot be ensured when the periphery of the antenna placement portion is held by hand.

An object of the present invention is to provide a portable wireless device that can obtain good antenna characteristics even in a state where the periphery of the antenna placement portion is held by hand.

The portable wireless device of the present invention includes a housing, a display unit provided so as to be visible from the first surface of the housing, the first surface side of the housing, and below the display unit. And a first antenna arranged.

The portable wireless device of the present invention includes a housing, a display unit provided so as to be visible from the first surface of the housing, a receiver that outputs sound, and the first surface side of the housing. And the 1st antenna arrange | positioned on the opposite side with respect to the said receiver of the said display part is taken.

According to the present invention, good antenna characteristics can be obtained even when the periphery of the antenna placement portion is held by hand.

The front view which shows schematic structure of the portable radio | wireless apparatus which concerns on embodiment of this invention The figure which shows the component of the portable radio | wireless apparatus of FIG. The figure which shows the component of the portable radio | wireless apparatus of FIG. The figure explaining the positional relationship of the 1st antenna of the portable radio | wireless apparatus which concerns on the said embodiment. The figure explaining the positional relationship of the 1st antenna of the portable radio | wireless apparatus which concerns on the said embodiment. Schematic diagram illustrating the characteristics of the antenna arrangement of the portable radio apparatus according to the above embodiment Bottom view when the portable wireless device according to the above embodiment is brought close to the hand in the hand Bottom view for explaining arrangement of first antenna of portable radio apparatus according to the above embodiment For the sake of comparison, the configuration of the portable wireless device according to the above embodiment is described. The figure explaining the structure in the case of having the ground wire of the portable radio | wireless apparatus which concerns on the said embodiment. The bottom view explaining the open end part of the 1st antenna of the portable radio | wireless apparatus which concerns on the said embodiment. The figure explaining the structure which has a parasitic element of the portable radio | wireless apparatus which concerns on the said embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 is a front view showing a schematic configuration of a portable radio apparatus according to an embodiment of the present invention. 2 and 3 are diagrams showing components of the portable radio apparatus of FIG. 2 (a) is a front view thereof, FIG. 2 (b) is a right side view thereof, FIG. 2 (c) is a top view thereof, FIG. 3 (a) is a rear view thereof, and FIG. Is a left side view thereof, and FIG. 3C is a bottom view thereof.

Hereinafter, the portable wireless device according to the present invention is embodied by a portable information terminal such as a PDA (Personal Digital Assistant). Further, the mobile radio apparatus according to the present invention may be applied to a mobile communication terminal of a mobile phone with camera / PHS (Personal Handy-Phone System).

The mounting volume of the portable wireless device 100 is reduced to increase the screen size of the display unit 120. The portable wireless device 100 is highly likely to hold the lower end portion 110a of the housing with the hand 1 regardless of the usage state such as a call or data communication.

As shown in FIGS. 1 to 3, the mobile wireless device 100 is installed in a housing 110, a display unit 120, a receiver 122, a circuit board 130, and a housing lower end part 110 a, and a power feeding point is provided to the circuit board 130. The first antenna 150, the ground line 160, and the parasitic element 170 connected via 140 are provided.

[Case 110]
The housing 110 has a bar-type structure. A microphone signal line and a microphone (not shown) connected to the circuit board 130 are installed at the lower end portion 110a of the housing. A sound absorption hole of a microphone (not shown) is opened at the bottom of the housing lower end 110a. Note that when the mobile wireless device 100 is a foldable mobile phone, the housing 110 is a main body side housing.

[Display unit 120]
The display unit 120 is provided so as to be visible from the first surface of the housing 110. The display unit 120 is a large display that covers substantially the entire surface of the housing 110. The display unit 120 is configured by an LCD display, an organic EL (Organic Electro-Luminescence) display, or the like, and displays contents of received information, contents, and the like. The display unit 120 is provided with a touch panel (not shown). Thus, the display unit 120 also has the function of an input unit.

[Receiver 122]
The receiver 122 is provided so as to be visible from the first surface of the housing 110 in the same manner as the display unit 120. In addition, the receiver 122 is provided on the first surface of the housing 110. More specifically, the sound emission hole of the receiver 122 is provided in the upper part of the first surface of the housing 110. The receiver 122 is a device that outputs sound. For example, when there is an incoming call, the receiver 122 sounds a ringtone or outputs the other party's voice.

[Circuit board 130]
The circuit board 130 is a printed board on which circuit components (not shown) that realize various functions of the mobile wireless device 100 are mounted. A feeding point 140 for connecting the first antenna 150 is formed at the lower end of the circuit board 130.

[First antenna 150]
The first antenna 150 is disposed on the first surface side of the housing 110. The first antenna 150 is disposed below the display unit 120. That is, the first antenna 150 is arranged on the opposite side of the display unit 120 with respect to the receiver 122. The first antenna 150 is connected to the feeding point 140 at the lower end of the circuit board 130. For the metal frame constituting the first antenna 150, a metal having high conductivity, light weight and high strength, for example, a magnesium alloy is used. The first antenna 150 extends in the width direction of the housing 110 from the feeding point 140 connected to the lower end of the circuit board 130 at the housing lower end portion 110a.

The first antenna 150 corresponds to the 2 GHz band, is disposed at the lower end of the housing 110 in a front view, and is disposed on the display unit 120 side in a cross-sectional view.

The first antenna 150 is formed with an open end 150a (see FIG. 7) that is substantially perpendicular to the rear case of the housing 110.

[Ground line 160]
The ground line 160 is disposed on the first surface side of the housing 110. The ground line 160 is disposed at the lower part of the display unit 120. That is, the ground line 160 is disposed on the opposite side to the receiver 122 of the display unit 120. The ground line 160 is disposed on the opposite side of the first antenna 150 in the width direction of the display unit 120 (the left-right direction in FIG. 2A).

The ground wire 160 is provided in addition to the first antenna 150 in the vicinity of the lower end of the surface on the display unit 120 side (that is, the surface on the receiver side, a position away from the hand). The first antenna 150 and the ground wire 160 are disposed on the opposite sides on the left and right. The ground line 160 and the conductive portion of the first antenna 150 are arranged so as to be substantially aligned on the same line.

The ground wire 160 is disposed at the lower end of the housing 110 in a front view and is disposed on the display unit 120 side in a cross-sectional view. The ground wire 160 is configured to be grounded to the ground point 162 via the reactance element 161 and to resonate in a predetermined band. Specifically, the ground wire 160 is configured to resonate in both the 800 MHz peripheral band and the 2 GHz band by adjusting the reactance element 161 or the like. The grounding point 162 is configured to be away from the feeding point 140 of the first antenna 150 in the lateral direction of the housing 110.

Note that the ground line 160 may be configured to resonate in either the 800 MHz peripheral band or the 2 GHz band instead of being configured to resonate in both the 800 MHz peripheral band and the 2 GHz band. For example, the ground line 160 can be adjusted so as to resonate within a frequency range lower by about 5 to 25% from the 800 MHz use band.

The ground wire 160 is formed with an open end 160a (see FIG. 6) that is substantially perpendicular to the rear case of the housing 110.

Thus, the open end 150a of the first antenna 150 and the open end 160a of the ground wire 160 are both substantially perpendicular to the first surface of the housing 110.

[Reactance element 161]
The reactance element 161 is provided between the ground wire 160 and the circuit board 130. Further, as described above, by adjusting the reactance element 161 or the like, the ground wire 160 can be configured to resonate in a predetermined band such as both the 00 MHz peripheral band and the 2 GHz band.

The reactance element 161 is preferably adjusted so that the resonance frequency of the ground wire 160 is in the 800 MHz band when the housing 110 is held by hand.

[Non-feed element 170]
The parasitic element 170 is provided in the casing 110 near the lower end of the surface on the display unit 120 side, on the surface opposite to the display unit 120.

The parasitic element 170 is a conductor having an electrical length of about λ / 2 with respect to the 2 GHz band.

[Second antenna 270]
The second antenna 270 is disposed on the second surface opposite to the first surface of the housing 110. In addition, the second antenna 270 is disposed below the display unit 120. That is, the second antenna 270 is arranged on the opposite side of the display unit 120 with respect to the receiver 122. Moreover, the 2nd antenna 270 respond | corresponds to 800 MHz band, is arrange | positioned at the lower end of the housing | casing 110 by front view, and is arrange | positioned by the other side of the display part 120 by cross-sectional view. The second antenna 270 is fed from the vicinity of the feeding point 140 of the first antenna 150 of the housing 110. The second antenna 270 is disposed at a position close to the hand on the opposite side to the display unit 120 side.

In the present embodiment, the second antenna 270 is a parasitic element 170 connected to the feeding point 140 of the first antenna 150 via a cutoff circuit (reactance element 171).

[Reactance element 171]
The reactance element 171 is a cutoff circuit of 1.5 GHz band to 2 GHz band disposed at the feeding point 140 of the second antenna 270. The reactance element 171 is a cutoff circuit that is disposed between the second antenna 270 and the feeding point 140 from the 1.5 GHz band to the 2 GHz band.

4 and 5 are diagrams for explaining the positional relationship of the first antenna 150, FIG. 4 is an enlarged view of a main part of FIG. 3B, and FIG. 5 is a bottom view thereof.

As shown in FIGS. 4 and 5, the first antenna 150A has a different cross-sectional shape from that of the first antenna 150 of FIG. 3C in order to explain dimensions and thickness. As with the first antenna 150, the first antenna 150A corresponds to 2 GHz, is disposed at the lower end of the housing 110 in a front view, and is disposed on the display unit 120 side in a cross-sectional view.

In the first antenna 150 </ b> A, the distance A between the surface of the first antenna 150 </ b> A and the display surface of the display unit 120 in the thickness direction of the housing 110 has the following relationship with respect to the total thickness T of the portable wireless device 100. Is set to

A ≦ 0.5 × T, preferably A ≦ 0.3 × T.

For example, from the above relational expression, when the total thickness T of the portable wireless device 100 is 14 mm, the distance A from the display surface is set to 4.2 mm or less.

According to the actual measurement example of the inventors, it has been found that the interval B between the back surface of the first antenna 150A and the back surface of the portable wireless device 100 is not important as long as the above-described condition of the interval A is satisfied.

As shown in FIG. 5, when the shape of the first antenna 150A is not constant in the thickness direction of the housing 110, the distance A is considered based on the location closest to the display surface 120 of the first antenna 150A. Shall.

Hereinafter, the operation of the mobile radio apparatus 100 configured as described above will be described.

6 and 7 are schematic diagrams for explaining the characteristics of the antenna arrangement of the portable radio apparatus 100. FIG. 6 (a) is a front view thereof, FIG. 6 (b) is a right side view thereof, and FIG. 6 (c) is a left side view thereof. FIG. 7 is a bottom view when the portable wireless device 100 is held in the hand 1 and brought close to the head 2.

[Configuration with Ground Line 160]
As shown in FIGS. 6A and 6C, the portable wireless device 100 has a ground line 160.

[First antenna 150: arrangement away from hand]
Figure 7a. 1, the first antenna 150 is disposed at a position away from the hand 1, that is, at the lower end of the housing 110 in front view, and is disposed on the display unit 120 side in sectional view.

[Ground line 160: Place away from hand]
As shown in FIGS. 6A and 6C, the ground line 160 is disposed at a position away from the hand 1, that is, at the lower end of the housing 110 in a front view, and is disposed on the display unit 120 side in a cross-sectional view. Here, the lower end of the housing 110 in a front view is the opposite side to the receiver 122 of the display unit 120. That is, the ground line 160 is disposed on the opposite side to the receiver 122 of the display unit 120.

[Ground wire 160: Grounded via reactance element 161]
As shown in FIGS. 6A and 6C, the ground wire 160 is grounded to the ground point 162 via the reactance element 161. The ground point 162 is formed at a position away from the feeding point 140 of the first antenna 150 in the short direction of the housing 110. The ground wire 160 is preferably configured to resonate within the 2 GHz use band by being grounded to the ground point 162 via the reactance element 161.

Also, the reactance element 161 preferably resonates the ground wire 160 within a frequency range that is about 5 to 25% lower than the 800 MHz band. In this way, when the reactance element 161 is configured to resonate the ground line 160 within a frequency range lower by about 5 to 25% than the 800 MHz use band, the reactance element 161 is held by the hand 1 as shown in FIG. Furthermore, the resonance frequency of the ground wire 160 can be configured to be in the 800 MHz use band. The reactance element 161 is preferably configured such that the ground wire 160 resonates in both the 800 MHz peripheral band and the 2 GHz band.

[First antenna 150: Open end 150a vertical configuration]
As shown in FIG. 7, the open end 150 a of the first antenna 150 on the side opposite to the feeding point 140 is formed so as to be substantially perpendicular to the rear case of the housing 110.

[Ground line 160: Open end 160a vertical configuration]
As shown in FIG. 6C, the open end 160 a of the ground wire 160 opposite to the ground point 162 is formed so as to be substantially perpendicular to the rear case of the housing 110.

[Configuration with Parasitic Element 170]
As shown in FIGS. 6 and 7, the portable wireless device 100 includes a parasitic element 170. The parasitic element 170 is a conductor having an electrical length of about λ / 2 with respect to the 2 GHz band, and is provided near the lower end of the surface on the display unit 120 side and on the surface opposite to the display unit 120. The parasitic element 170 operates as a reflective element of the first antenna 150.

[Non-feed element 170: Connected to feed point 140 via reactance element 171]
As shown in FIGS. 6 and 7, the parasitic element 170 is connected to the feeding point 140 via the reactance element 171. The reactance element 171 is a cut-off circuit that cuts off the 1.5 GHz band to the 2 GHz band. The parasitic element 170 operates as the second antenna 270 by being connected to the feeding point 140 via the reactance element 171. That is, the parasitic element 170 operates as a reflecting element of the first antenna 150, and is connected to the feeding point 140 via a 1.5 GHz to 2 GHz cutoff circuit (reactance element 171), so that the 800 MHz band first element is operated. It operates as a two-antenna 270.

[Configuration with second antenna 270]
As shown in FIGS. 6 and 7, the second antenna 270 is configured by connecting a parasitic element 170 to a feeding point 140 via a reactance element 171. The second antenna 270 is fed from the vicinity of the feeding point 140 of the first antenna 150 of the housing 110. The second antenna 270 corresponds to the 800 MHz band. Since the second antenna 270 is also the parasitic element 170 itself, the second antenna 270 is disposed at the same position as the parasitic element 170, that is, at the lower end of the housing 110 in a front view, and on the opposite side of the display unit 120 in a sectional view. Yes.

Figure 7b. 2, the second antenna 270 is disposed at a position close to the hand on the opposite side of the display unit 120 of the housing 110. The second antenna 270 is provided on the opposite side of the first surface of the housing 110 and below the center of the display unit 120 in the vertical direction in FIG.

The characteristics of the antenna arrangement will be described in more detail.

FIG. 8 is a bottom view for explaining the arrangement of the first antenna 150 of the mobile radio apparatus 100.

Figure 8a. 1, the first antenna 150 is disposed at a position away from the hand 1, that is, at the lower end of the housing 110 in a front view, and is disposed on the display unit 120 side in a cross-sectional view. Although not shown, the ground line 160 is disposed at a position away from the hand 1, that is, at the lower end of the housing 110 in a front view, and is disposed on the display unit 120 side in a cross-sectional view.

This antenna arrangement allows the first antenna 150 to be separated from the palm, thereby reducing the influence of the hand 1. In addition, the influence of the human body can be suppressed and high antenna performance can be obtained.

9 and 10 are diagrams illustrating a configuration having the ground line 160 of the portable wireless device 100. FIG. FIG. 9A is a plan view when the ground line 160 is not present for comparison, and FIG. 9B is a right side view thereof. 10A is a front view of a configuration having a ground wire 160, FIG. 10B is a right side view thereof, and FIG. 10C is a left side view thereof.

As shown in FIG. 9, when there is no ground wire 160, the antenna current from the first antenna 150 flows to the circuit board 130 through the feeding point 140. Since the antenna current without the ground wire 160 flows through the circuit board 130, the antenna characteristics may not be secured due to the influence of the hand 1.

As shown in FIG. 10, the portable wireless device 100 adopts a configuration in which the ground wire 160 is disposed at a position away from the hand 1, that is, the lower end of the housing 110 in a front view and the display unit 120 side in a cross-sectional view. The ground wire 160 is grounded to the ground point 162 via the reactance element 161 and is configured to resonate within the 2 GHz use band. The ground point 162 is formed at a position away from the feeding point 140 of the first antenna 150 in the short direction of the housing 110.

By providing the ground wire 160, the antenna current (2 GHz current) from the first antenna 150 rides (circulates) the ground wire 160 as shown in FIG. When the antenna current is on the ground line 160 away from the palm, the influence of the hand 1 can be reduced. In addition, the influence of the human body can be suppressed and high antenna performance can be obtained.

Here, as described above with reference to FIG. 6C, the ground wire 160 is formed so that the open end portion 160 a opposite to the ground contact point 162 is substantially perpendicular to the rear case of the housing 110. Thus, the palm and the open end 160a are orthogonal to each other, and the influence of the hand 1 can be further reduced.

FIG. 11 is a bottom view for explaining the open end 150a of the first antenna 150 of the portable radio apparatus 100. FIG.

As shown in FIG. 11, the first antenna 150 is formed such that the open end 150 a on the opposite side of the feeding point 140 is substantially perpendicular to the rear case of the housing 110. Thereby, the influence of the hand 1 can be further reduced by making the palm and the open end 160a orthogonal to each other and making the sensitive part with high impedance vertical.

FIG. 12 is a diagram for explaining a configuration having the parasitic element 170 of the portable wireless device 100. FIG. 12A is a front view thereof, and FIG. 12B is a right side view thereof.

As shown in FIG. 12, the mobile radio apparatus 100 includes a parasitic element 170 that is disposed substantially in parallel with the first antenna 150. The parasitic element 170 is a contactless terminal having a length of about λ / 2 with respect to 2 GHz, and is provided near the lower end of the surface on the display unit 120 side and on the surface opposite to the display unit 120. . The parasitic element 170 operates as a reflective element of the first antenna 150. Since the parasitic element 170 operates as a reflective element, the influence of the hand 1 can be further reduced.

As described above in detail, the mobile wireless device 100 of the present embodiment is provided on the side of the display unit 120 provided so as to be visible from the first surface of the housing 110 and the first surface of the housing 110. A first antenna 150 disposed below the display unit 120, and a ground line 160 disposed below the display unit 120 on the side opposite to the first antenna 150 in the width direction of the display unit 120. I have. The first antenna 150 has an open end 150a that is substantially perpendicular to the first surface, and the ground wire 160 has an open end 160a that is substantially perpendicular to the first surface.

The portable wireless device 100 includes a circuit board 130 and a reactance element 161 provided between the ground wire 160 and the circuit board 130. The reactance element 161 is adjusted so as to resonate within a frequency range lower by about 5 to 25% from the 800 MHz use band. The reactance element 161 adjusts the resonance frequency of the ground wire 160 to the 800 MHz band when holding the casing 110 by hand. In addition, the reactance element 161 adjusts the resonance frequency of the ground line 160 so as to resonate in both the 800 MHz peripheral band and the 2 GHz band.

Further, the portable wireless device 100 includes a parasitic element 170 disposed on the second surface opposite to the first surface of the housing 110 and below the display unit 120. The parasitic element 170 is a parasitic element having a length of about λ / 2 with respect to the 2 GHz band.

Further, the mobile wireless device 100 includes a second antenna 270 disposed on the lower surface of the display unit 120 on the second surface opposite to the first surface of the housing 110. The second antenna 270 is a parasitic element 170 connected to the feeding point 140 of the first antenna 150 via a cutoff circuit (reactance element 171).

With the above configuration, the first antenna 150 can be separated from the palm, and the influence of the hand can be reduced. Moreover, the influence of the hand can be further reduced by placing a 2 GHz current on the ground wire 160 away from the palm. The palm and the first antenna 150 and the open end of the ground wire 160 are orthogonal to each other, so that the influence of the hand can be further reduced.

<Effect of the hand can be further reduced by the parasitic element 170 operating as a reflective element.

Here, in the 800 MHz band, since the case 110 current is dominant due to the size of the case 110, the effect of releasing from the hand is small. Therefore, in order to suppress interference with the 2 GHz band, it is configured to be separated from the first antenna 150 in the thickness direction of the housing 110 (arranged on the opposite side of the display unit 120 in a sectional view).

The reason why the reactance element 161 is adjusted to resonate within a frequency range lower by about 5 to 25% from the 800 MHz use band is as follows.

Due to mounting restrictions, the ground line 160 has to be small for the 800 MHz band. If too much current is applied to the ground wire 160, the fundamental radiation efficiency will deteriorate. Therefore, in the present embodiment, the ground line 160 is resonated at a frequency slightly lower than the 800 MHz use band, and the current is distributed to the ground line 160 contact side away from the power supply of the ground line 160 and the casing 110, thereby the 800 MHz band. Reduces the effects of hands on

The reactance element 161 can further reduce the influence of the hand by adjusting the resonance frequency of the ground wire 160 to the 800 MHz band when the casing 110 is held by hand.

The reactance element 161 adjusts the resonance frequency of the ground line 160 so as to resonate in both the 800 MHz peripheral band and the 2 GHz band, thereby obtaining the effect of the ground line 160 described above at both 800 MHz and 2 GHz. it can.

The parasitic element 170 can be operated as the second antenna 270 by connecting the parasitic element 170 to the feeding point 140 of the first antenna 150 via a cutoff circuit (reactance element 171). Can be shared with the parasitic element 170.

Here, the power supply side of the first antenna 150 may be formed thick and the open end side may be formed thin. At this time, the thinned open end is shaped as close to the display unit 120 as possible. Further, a parallel resonant circuit that resonates between the 1.5 GHz band and the 2 GHz band is inserted into the power supply pair GND as an antenna matching circuit so as to match the 1.5 GHz band and the 2 GHz band. With this configuration, the first antenna 150 can be made to have two resonances (1.5 GHz band, 2 GHz band) without trap loading in the middle of a general element. In addition to improving the performance of the trap loss, there is an effect that leads to cost reduction.

The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this.

Any portable wireless device having a display unit provided so as to be visible from the first surface of the housing and a first antenna disposed on the first surface side of the housing and below the display unit It is applicable also to such an apparatus. For example, it can be applied not only to portable wireless devices with a bar structure, but also to portable information terminals such as mobile phones / PHS (Personal Handy-Phone System) and PDA (Personal Digital Assistants), and information processing devices such as notebook computers. It is.

In the above embodiment, the name “mobile radio device” is used. However, this is for convenience of explanation, and it goes without saying that a portable radio device, a radio device, or the like may be used.

In addition, the casing, antenna elements, types and number of display units, connection methods, and the like constituting the portable wireless device are not limited to the above-described embodiments.

The disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2011-1117058 filed on May 25, 2011 is incorporated herein by reference.

The portable wireless device according to the present invention can provide a portable wireless device that can obtain good antenna characteristics even when the periphery of the antenna placement portion is held by hand. This is useful for portable wireless devices such as mobile phones having a bar structure.

1 hand 2 100 portable wireless device 110 housing 110a housing lower end 120 display unit 122 receiver 130 circuit board 140

feeding point

150, 150A

first antenna

150a, 160a open end 160 ground 160a

open end

161, 171 reactance Element 162 Ground point 170 Parasitic element 270 Second antenna

Claims

A housing,
A display unit provided so as to be visible from the first surface of the housing;
A first antenna disposed on the first surface side of the housing and below the display unit;
A portable wireless device.
A housing,
A display unit provided so as to be visible from the first surface of the housing;
A receiver that outputs sound,
A first antenna disposed on a side opposite to the receiver of the display unit on the first surface side of the housing;
A portable wireless device.
2. A ground wire disposed on the first surface side of the housing and at a lower portion of the display unit, on the side opposite to the first antenna in the width direction of the display unit. The portable wireless device described in 1.
The portable wireless device according to claim 1, wherein the first antenna has an open end that is substantially perpendicular to the first surface.
The portable radio apparatus according to claim 3, wherein the ground line has an open end portion that is substantially perpendicular to the first surface.
The portable wireless device according to claim 1, further comprising a parasitic element disposed on a second surface opposite to the first surface of the housing and disposed below the display unit.
The portable wireless device according to claim 2, further comprising a parasitic element disposed on a second surface opposite to the first surface of the housing and on the opposite side of the display unit with respect to the receiver.
The portable wireless device according to claim 6, wherein the parasitic element is a contactless element having a length of about λ / 2 with respect to 2 GHz.
The portable wireless device according to claim 1, further comprising: a second antenna disposed on a second surface opposite to the first surface of the housing and disposed below the display unit.
The portable wireless device according to claim 2, further comprising a second antenna disposed on a second surface opposite to the first surface of the housing and on the opposite side of the display unit with respect to the receiver.
A circuit board;
The portable wireless device according to claim 3, further comprising: a reactance element provided between the ground wire and the circuit board.
12. The portable radio apparatus according to claim 11, wherein the reactance element is adjusted so that a resonance frequency of the ground wire is within a frequency range lower by about 5 to 25% than an 800 MHz use band.
The portable wireless device according to claim 11, wherein the reactance element is adjusted so that a resonance frequency of the ground wire is in a band of 800 MHz when the housing is held by hand.
The portable radio device according to claim 11, wherein the reactance element is adjusted so that a resonance frequency of the ground wire is in both an 800 MHz peripheral band and a 2 GHz band.
The portable wireless device according to claim 9, wherein the second antenna is a parasitic element connected to a feeding point of the first antenna via a cutoff circuit.
The portable wireless device according to claim 15, wherein the cutoff circuit is a reactance element that cuts off 1.5 GHz to 2 GHz.