JP3480821B2 - Portable electronic information equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electronic information device for wirelessly performing data communication, and more particularly to the configuration of an antenna used for communication.

[0002]

Data communication such as electronic mail, personal computer communication, and facsimile communication via a public telephone network by combining a portable electronic information device such as a notebook personal computer with a communication terminal such as a mobile telephone terminal or a PHS terminal. It has already been put to practical use and has become popular. In this case, the communication terminal is connected to the portable electronic information device via the connection cable and the communication modem or PC card type communication modem built in the portable electronic information device.

Further, P, which is a kind of portable electronic information equipment,
A model in which a DA has a function of a mobile phone or PHS has also appeared. In such a portable electronic information device, not only the wireless transmission / reception circuit but also the antenna is integrated with the main body.

On the other hand, as a type of mobile phone that can be folded when being carried, there is proposed a mobile phone having an antenna structure that operates as a built-in dipole antenna when used and as a loop antenna when folded (Japanese Patent Laid-Open No. 5-14230). .

[0005]

When performing data communication by combining a portable electronic information device with a communication terminal such as a mobile phone terminal or a PHS terminal, the communication terminal incorporates or is connected to the portable electronic information device. There is a problem that the operation is complicated because it requires a work of connecting with a modem for use with a cable and a communication terminal and a portable electronic information device.

On the other hand, mobile phones and PHs in standby mode
In the portable electronic information device connected to the S terminal, when a call is received from the center, the power is automatically turned on and the corresponding application is launched to receive e-mails, etc. A function is being implemented in which the user is instructed to send data when it is necessary to send the data and the data is automatically sent when the user enters the area. In order to realize this function efficiently, it is considered important to be able to perform good transmission / reception in the standby state, but the conventional technology cannot sufficiently meet such a demand.

[0007] Further, in the future, not only smaller and lighter weight, but also higher performance portable wireless devices will be required, and more than the PDA type without a keyboard part,
It is expected that portable communication information devices equipped with both a display and a keyboard will become mainstream. Small mobile devices
As a method for realizing weight reduction, it is advantageous to adopt a configuration in which it is folded when it is carried. Particularly, the method for configuring the built-in loop antenna in the folded state as disclosed in Japanese Patent Laid-Open No. 5-14230 is as described above. It is also considered useful for communication information equipment.

However, when data communication requiring a high gain, that is, when the portable communication information equipment is used in the expanded state, a method of operating the antenna as the built-in dipole antenna in the expanded state as in JP-A-5-14230. Then, since the built-in dipole antenna cannot obtain sufficient gain, good communication cannot be performed.

The present invention solves the above problems,
An object of the present invention is to provide a portable electronic information device that can obtain good characteristics with respect to antenna gain and the like in both the unfolded state and the folded state in a configuration that is in the unfolded state during normal use and the folded state during standby.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a developed state in which a display housing is rotatably connected to the main housing and the display housing is opened with respect to the main housing. In a portable electronic information device configured so that the main body housing and the display housing are opposed to each other to be able to selectively assume a closed folded state, the portable electronic information device is configured to be expandable and contractable disposed on a side surface portion of the display housing. First
Of the antenna and a second antenna built in the main body housing, and the first antenna is extended to operate as a monopole antenna in the unfolded state, and the first antenna in the folded state.
The antenna is contracted and is connected to the second antenna to form a loop antenna by the first and second antennas.

As described above, according to the present invention, the monopole antenna is formed in the unfolded state, that is, the normal use, and the loop antenna is formed in the folded state, for example, in the standby state, so that high gain can be obtained in any case.

In the present invention, when the first antenna is extended and contracted, the first feeding point of the first antenna is placed at the first feeding point.
By connecting the wireless transmission / reception circuit and the second wireless transmission / reception circuit, separate wireless transmission / reception circuits may be used for expansion and contraction.

The first and second power feeding terminals are connected to the power feeding points of the first antenna when the first antenna is extended and contracted, and one end is connected to the first and second power feeding terminals. First having a half wavelength length at the used frequency
And a second power feeding line and a radio transmitting / receiving circuit commonly connected to the other ends of the first and second power feeding lines, even if one radio transmitting / receiving circuit is shared during expansion and contraction. Good. This can contribute to simplification of the circuit and reduction in size and weight.

Further, the first antenna connected to the feeding point of the first antenna when the first antenna extends and contracts, respectively.
And a second power supply terminal, a first power supply line whose one end is connected to the first power supply terminal, a wireless transmission / reception circuit connected to the other end of the first power supply line, and a second power supply terminal It is also possible to further increase the gain of the loop antenna by forming the feeding system of the antenna into a folded structure by providing the second feeding line whose other end is grounded.

In the folded state, it is necessary to connect the first and second antennas, but it is desirable to make this connection capacitively.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 4 are views for explaining a portable electronic information device according to a first embodiment of the present invention. FIG. 1 is a developed state and FIG. 2 is a folded state. Shows the outline of. 3A and 3B are schematic diagrams for explaining the operation in the unfolded state and the folded state, and FIG.
Is the first antenna on the display housing 2 side and the main body housing 1
The structure of the antenna interface part which manages connection with the 2nd antenna of the side is shown.

This portable electronic information device is a notebook personal computer type electronic information device having a wireless communication function. The main body housing 1 has a CPU, a semiconductor memory, an external storage device such as a hard disk, various interfaces and A main body portion of an electronic information device including a communication circuit portion and the like is built in, and a keyboard 3 and the like are mounted on the surface portion.

On the other hand, the display housing 2 has an LCD
A display unit 4 such as a (liquid crystal display) is mounted. In addition, a part of the circuit elements forming the electronic information device may be mounted inside the display housing 3.

It is necessary that at least the parts of the main body housing 1 and the display housing 2 on which the antenna is mounted are made of non-metal such as plastic so as not to deteriorate the antenna performance.

The display housing 2 is rotatably connected to the main body housing 1 via a hinge mechanism 5, and the portable electronic information device has the display housing 2 opened with respect to the main body housing 1. 1 and 3 as a so-called spread state.
The unfolded state shown in (a) and the folded state shown in FIGS. 2 and 3 (b) in which the main body housing 1 and the display housing 2 are closed so as to face each other are selectively configured.

Next, the configuration of the antenna for wireless communication in this embodiment will be described. First, the display housing 2
The first antenna 11 is provided on the side surface of the. This first antenna 11 is a rod-shaped antenna having a length of λ / 4, where λ is the wavelength at the operating frequency, and is guided by the first feeding terminal 12A, the conductive guide 13 and the second feeding terminal 12B. It can be expanded and contracted. The tip portion 11 'of the antenna 11 is formed of an insulating material, and this portion does not function as an antenna. Therefore, for the length λ / 4 of the antenna 11, the tip portion 1 made of this insulating material is used.
The 1'length is not included.

The first and second power supply terminals 12A and 12B and the conductive guide 13 are both formed in a cylindrical shape from a conductive material such as metal or conductive rubber, and the first antenna 11 expands and contracts. Sometimes, these power supply terminals 12
A and 12B are guided through the inside of the conductive guide 13 and are in electrical contact with them. First and second wireless transmission / reception circuits 14A and 14B are connected to the first and second power supply terminals 12A and 12B, respectively. The wireless transceiver circuits 14A and 14B are mounted in the display housing 2 in this example.

The conductive guide 13 is electrically connected to a contact portion 15 provided at a position facing the main body casing 1 on the side surface portion of the display casing 2 on which the antenna 11 is provided. The structure of the contact portion 15 will be described later in detail.

On the other hand, on the side surface portion of the main body housing 1, a rod-shaped or linear second antenna 16 is provided so that the tip extends to the side surface portion of the display housing 2 where the first antenna 11 is provided. It is arranged.

The second antenna 16 has a portion 16A parallel to the longitudinal direction of the side surface portion of the main body housing 2, and vertical portions 16B and 16C continuous to both ends of the portion 16A and an extension portion 16.
It consists of D and 16A has a length of λ / 2, 1
The 6D portion has a length of λ / 4. One of the vertical portions 16C is continuous with the extending portion 16D on the side surface of the display housing 2, and the other 16B is the display housing 2.
Is connected to a contact portion 17 provided at a position opposed to. The configuration of the contact portion 17 will be described later in detail.

Next, the operation of the portable electronic information device of this embodiment will be described. [Deployment] As shown in FIGS. 1 and 3A, when the display housing 2 is opened with respect to the main body housing 1,
The first antenna 11 is pulled out from the display housing 2 and extended by the user. At this time, the first antenna 11 operates as a monopole antenna, and transmission / reception is performed in this state.

That is, in the first antenna 11, the feeding point at the base end thereof is connected to the first feeding terminal 12A, and the first wireless transmission / reception circuit 14A connected to this feeding terminal 12A.
The radio transmission / reception circuit 14 transmits or receives the high frequency signal by supplying the high frequency signal from the wireless transmission / reception circuit 14.
Supply to A.

Since the main body housing 1 and the display housing 2 have a large number of electrically conductive parts mounted therein, they can be regarded as substantially conductors in terms of high frequency, and therefore can be used as the ground of the monopole antenna. Operate. Therefore, the magnetic or electrostatic shield effect of the main body housing 1 and the display housing 2 can suppress the influence of a base or the like on which the portable electronic information device is placed as a ground, and stable transmission / reception can be performed.

Further, in this state, since the first antenna 11 which is a monopole antenna is in a vertical state, that is, in a state substantially vertical to the ground, the antenna directivity becomes omnidirectional in the horizontal plane, and an incoming wave is transmitted at the time of transmission. Can be received from any direction, and can efficiently receive an incoming wave of vertically polarized waves transmitted by a mobile phone or a PHS base station.

[Folding] As shown in FIGS. 2 and 3B, when the display housing 2 is folded so as to face the main body housing 1, the first antenna 11 becomes an obstacle when carrying. In order to prevent damage and to prevent damage due to dropping, the user is contracted and stored in the side surface portion of the display housing 2, and the whole is positioned on the side surface portion of the display housing 2. At this time, the first and second antennas 11 and 16 form a loop antenna as a whole,
Since transmission and reception can be performed in this state, it is possible to perform a standby operation or the like.

That is, the first antenna 11 is electrically cut off when the insulating tip portion 11 'is located at the first power supply terminal 12A, and receives a signal from the first wireless transmission / reception circuit 14A. At the same time, the feeding point at the base end is connected to the second feeding terminal 12B, and the high-frequency signal is received from or received by the second wireless transmission / reception circuit 14B connected to the feeding terminal 12B. Is supplied to the wireless transmission / reception circuit 14B.

At this time, the tip of the conductive portion of the first antenna 11 is electrically connected to the conductive guide 13, and the contact portion 15 connected to the conductive guide 13 is located on the main body casing 1 side. As will be described later, the contact portion 17 is preferably capacitively connected, and these contact portions 15 and 17 form an antenna interface portion 20. Therefore, the antennas 11 and 16 form a loop antenna having a length of λ as a whole via the antenna interface unit 20.

In such a folded state, it is expected that the first antenna 11 is generally placed horizontally with respect to the ground. In this case, it is desirable that the antenna be of a magnetic field coupling type. If the antenna is a dipole antenna, if the portable electronic information device is placed on a metal base or the thigh of a person who can be regarded as a good conductor, the electric field coupling type antenna such as the dipole antenna is caused by these boundary conditions. The electric field component due to is significantly reduced.

On the other hand, in a magnetic field coupling type antenna such as a loop antenna, the magnetic field component increases by nearly 3 dB, and in such a case, the loop antenna can obtain better antenna characteristics than the dipole antenna. .

4A and 4B are views showing a concrete example of the antenna interface section 20, in which FIG. 4A shows a state when unfolded and FIG. 4B shows a state when folded. The contact portion 15 on the display housing 2 side is made of a rectangular or circular metal plate,
It is connected to the conductive guide 13 via a metal spring 21.

The contact portion 17 on the main body housing 1 side is also made of a rectangular or circular metal plate. The contact portion 17 is embedded in the main body casing 1, for example,
A relatively thin non-metallic spacer 22 is arranged thereon. The surface of the non-metal spacer 22 is located on the same plane as the surface of the main body housing 1, or slightly protrudes from the surface of the main body housing 1.

At the time of unfolding, as shown in FIG. 4A, the contact portion 15 on the display housing 2 side is separated from the contact portion 17 on the main body housing 1 side. Therefore, the second antenna 16 does not work as an antenna because the feeding point is not connected to the first antenna 11 connected to the high frequency transmitting / receiving circuit 14A.

On the other hand, at the time of folding, as shown in FIG. 4 (b), the metal spring 21 is compressed to contact the contact portion 1.
5 approaches the contact portion 17 via the non-metal spacer 22. As a result, a capacitor is formed by the contact portion 15, the non-metal spacer 22 and the contact portion 17, so that the first antenna 11 and the second antenna 16 are capacitively connected by the antenna interface portion 20. Therefore, the second antenna 16 also operates as an antenna by being connected to the high frequency transmitting / receiving circuit 14B via the first antenna 11, and the antennas 11 and 16 are provided.
It will function as a loop antenna as a whole.

The capacitive reactance value of the antenna interface section 20 can be adjusted by forming the non-metal spacer 22 with a dielectric material and appropriately selecting the dielectric constant and the film thickness thereof. This makes it possible to adjust the characteristics of the loop antenna.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention.
It is a figure which shows the structure of the portable electronic information device which concerns on embodiment of this, Comprising: Similar to FIG. 3, (a) is the unfolded state, (b) has shown the outline of a folding state, respectively.

1 to 4, the same parts as those in FIGS. 1 to 4 are designated by the same reference numerals, and different points from the first embodiment will be mainly described. To be able to use. That is,
The first and second power supply terminals 12A and 12B are respectively the first
And the common high-frequency transmission / reception circuit 14 via the second power supply lines 23A and 23B. Here, the power supply line 23
The length of A and 23B is λ / 2.

At the time of expansion, as shown in FIG. 5A, the feeding point of the first antenna 11 is connected to the radio transmitting / receiving circuit 14 via the first feeding terminal 12A and the first feeding line 23A. At this time, since the length of the second feeding line 23B not connected to the feeding point of the first antenna 11 is λ / 2, the wireless transmission / reception circuit 14 causes the feeding line 23 to move.
Since the impedance viewed from the B side is equivalent to an open circuit, only the first power supply terminal 12A is supplied with power via the first power supply line 23A.

Similarly, when folded, the feeding point of the first antenna 11 is the second feeding terminal 1 as shown in FIG. 5 (b).
It is connected to the wireless transmission / reception circuit 14 via 2B and the second feeding line 23B. At this time, the length of the first feeding line 23A not connected to the feeding point of the first antenna 11 is λ /
Since the impedance as viewed from the wireless transmission / reception circuit 14 to the side of the power feeding line 23A is equivalent to being open because it is 2, the second power feeding terminal 12 is connected via the second power feeding line 23B.
Only B is powered.

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained, and the wireless transmission / reception circuit is shared by the time of unfolding and the time of folding so that only one circuit is required. The size can be reduced, and the structure is advantageous due to the reduction in size and weight.

(Third Embodiment) FIG. 6 shows a third embodiment of the present invention.
It is a figure which shows the structure of the portable electronic information device which concerns on embodiment of this. Like FIG.3 and FIG.5, (a) is a deployment state, (b).
Shows the outline in the folded state, respectively.

In this embodiment, as in the second embodiment, the high-frequency transmitting / receiving circuit 14 that is common to both the unfolded state and the folded state is used, and the folded structure is adopted in the feeding system of the antenna.

First, on the display housing 2 side, the first and second power supply terminals 12A and 12B are respectively connected to the first
And, it is connected to each one end of the second power supply lines 31A and 31B. The other end of the first power supply line 31A has the wireless transmission / reception circuit 14
And the other end of the second feed line 31B is grounded.

The first and second conductive guides 1 are provided at positions outside the first and second power supply terminals 12A and 12B as viewed in the longitudinal direction of the side surface of the display housing 2.
3A and 13B are provided, and these conductive guides 13
Contact portions 15A and 15B are connected to A and 13B, respectively.

On the other hand, on the side of the main body housing 1, the second antenna 16 has a λ parallel to the longitudinal direction of the side surface of the main body housing 1.
It consists of a portion 16A having a length of / 2 and vertical portions 16B and 16C which are continuous with both ends of the parallel portion 16A. The end portions of the portions 16B and 16C opposite to the portion 16A are contact portions. 17A and 17B, respectively.

At the time of development, as shown in FIG. 6A, the feeding point of the first antenna 11 is connected to the radio transmitting / receiving circuit 14 via the first feeding terminal 12A and the first feeding line 31A. At this time, the first antenna 11 has a length of λ / 4.
Operates as a monopole antenna.

When folded, the feeding point of the first antenna 11 is connected to the second feeding terminal 12B as shown in FIG. 6 (b). At this time, the first antenna 11 is
And the second conductive guides 13A, 13B are electrically connected, and the contact portions 15A, 15B respectively connected to the conductive guides 13A, 13B are connected to the contact portions 17A, 17B on the main body casing 1 side. The antenna interface units 20A and 20B are formed.

These antenna interface units 20
If A and 20B have the same structure as in FIG. 4, for example, the contact portions 15A and 15B and the contact portions 17A and 17B are capacitively connected. Therefore, the antenna 1
1, 16 form a loop antenna having a length of λ as a whole via the antenna interface unit 20.

As described above, since the main body housing 1 and the display housing 2 have a large number of conductive parts mounted therein, they can be regarded as substantially conductors at high frequencies.
Generally, when an antenna (a loop antenna in the example of FIG. 7) is close to a metal housing as shown in FIGS. 7A and 7B, an image current is generated on the metal housing. Since the loop surface of the loop antenna and the surface of the metal casing are parallel to each other, the image current is generated so as to cancel the current on the antenna. Therefore, the amount of radiation of the antenna is reduced and the resistance component of the antenna is reduced, so that the impedance is reduced.

According to the present embodiment, in order to avoid the decrease of the antenna impedance due to the influence of such an image current, the antenna feeding system has a folded structure 30 as shown in FIG. 6B. is doing.

The folded structure 30 will be described in more detail with reference to FIG. The folded structure 30 of FIG. 8 has the same principle as a known folded dipole antenna.
That is, in the folded state, the first antenna 11 and the second antenna 11
The loop antenna 32 is formed by the antenna 16 and the loop antenna 32, and the folded structure 30 is formed by the feed lines 31A and 31B so that a part of the loop antenna 32 is short-circuited at high frequency.

In this case, the length L of the folded structure 30 in the figure affects the capacitive reactance, and the length d affects the inductive reactance. Therefore, by adjusting the lengths of L and d so as to cancel both reactances, the feed line 31
If the impedance of A and 31B is only pure resistance,
A matching circuit for increasing the impedance at the feeding point of the loop antenna 30 can be formed. That is, the loop structure 30 can increase the gain of the loop antenna by matching the impedance of the feed lines 31A and 31B (usually 50Ω).

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained, and since only one radio transmitting / receiving circuit is required as in the second embodiment, the circuit scale can be reduced. It is possible to reduce the antenna gain when operating as a loop antenna in the folded state due to the influence of the image current by adopting a folded structure in the antenna feeding system, in addition to the advantageous configuration due to the reduction in size and weight. High antenna gain can be obtained by suppressing.

(Fourth Embodiment) FIG. 9 shows a fourth embodiment of the present invention.
The portable electronic information device according to the embodiment, wherein the first antennas 11A and 11B are provided on both side surfaces of the display housing 2.
Are arranged respectively. The second antenna may also be arranged on both side surfaces of the main body housing 1. Further, the antennas may be arranged not only in one system or two systems but also in three systems or more.

By arranging the antennas of a plurality of systems as described above, a technique for maintaining a good transmission / reception state according to the radio wave propagation environment by using the antennas of a plurality of systems, for example, an antenna switching diversity system, By adopting an adaptive antenna system or the like in which the main beam of the antenna is directed in the direction of arrival of the desired wave and the null of the antenna beam is formed in the direction of arrival of unnecessary waves such as interference waves, better transmission and reception becomes possible.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, although the wireless transmission / reception circuits 14A, 14B, 14 are mounted in the display housing 2 in the above embodiment, they may be mounted in the main body housing 1.

In the above embodiment, the power supply terminals 12A,
12B and the conductive guides 13, 13A, 13B and the like in the portion connected to the contact portion 15 of the first antenna 11 also serve as the guide member of the first antenna 11, but the feeding terminal and the guide member are separately provided. It may be provided.

Further, although the cylindrical power supply terminal and the conductive guide are used for the guide of the first antenna, various other configurations can be adopted for the guide mechanism.

Furthermore, in the figure, the antennas 11, 11A, 1
1, 16, power supply terminals 12A, 12B and conductive guide 1
Although the parts 3, 13A, 13B, etc. are exposed, it is desirable to cover them with a cover or arrange them inside the side surface of the housing.

[0064]

As described above, according to the present invention, the configuration method of the antenna is changed in consideration of the influence of the surroundings due to the change in the usage state of the portable electronic information device, so that the portable telephone and the PHS system are always operated. Etc. can communicate with the base station.

Specifically, when the portable electronic information device is developed, the first antenna on the display casing side is operated as a monopole antenna, and when folding the portable electronic information device, the first antenna on the display casing side and the main body casing are used. By forming the loop antenna as a whole by connecting the second antenna incorporated in the body, a high antenna gain can be ensured both at the time of unfolding and at the time of folding, and good transmission / reception becomes possible.

Further, since it is possible to realize the proper use of the antennas with a single antenna configuration, it is possible to further reduce the size and weight of the portable electronic information device, as compared with the configuration in which different antennas are used for each usage state. Can be planned.

Further, if a folded structure is adopted in the feeding system of the antenna so as to achieve impedance matching between the low impedance loop antenna and the feeding line which is usually 50Ω, the line transmission / reception circuit is made one, and The influence of the power supply line can be reduced and the length of the power supply line can be shortened, and the structure can be further simplified and the size and weight can be reduced.

As described above, according to the present invention, it is possible to provide a compact and lightweight portable electronic information device with an integrated antenna, which can realize data communication wirelessly via a public telephone line network or the like with high reliability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a portable electronic information device according to a first embodiment of the present invention in a developed state.

FIG. 2 is a perspective view showing a schematic configuration of the portable electronic information device according to the embodiment in a folded state.

FIG. 3 is a side view schematically showing the configuration of the portable electronic information device according to the embodiment in an unfolded state and a folded state.

FIG. 4 is a diagram showing a configuration of an antenna interface portion between a main body housing and a display housing when the antenna interface portion is expanded and folded.

FIG. 5 is a side view schematically showing a configuration of a portable electronic information device according to a second embodiment of the present invention in an unfolded state and a folded state.

FIG. 6 is a side view schematically showing a configuration of a portable electronic information device according to a third embodiment of the present invention in a developed state and a folded state.

FIG. 7 is a diagram for explaining the influence of an image current for explaining the third embodiment of the present invention.

FIG. 8 is a diagram illustrating a folded structure according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a schematic configuration of a portable electronic information device according to a fourth embodiment of the present invention in a folded state.

[Explanation of symbols]

1 ... Main body housing 2 ... Display housing 3 ... Keyboard 4 ... Display section 5 ... Hinge mechanism 11, 11A, 11B ... First antenna 12A, 12B ... Power supply terminals 13A, 13B, 13 ... Conductive guide member 14A, 14B, 14 ... High-frequency transmitting / receiving circuit 15 ... Contact part 16 ... Second antenna 17 ... Contact part 20 ... Antenna interface section 21 ... Metal spring 22 ... Non-metallic spacer 23A, 23B ... Feed line 30 ... Folded structure 31A, 31B ... Feed line

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-18220 (JP, A) JP-A-9-18216 (JP, A) JP-A-11-163620 (JP, A) JP-A-9- 93030 (JP, A) JP 5-14230 (JP, A) JP 9-238015 (JP, A) JP 6-216621 (JP, A) JP 6-12850 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01Q 1/12 H01Q 1/24 G06F 1/00

Claims (4)

(57) [Claims] 1. A display housing is rotatably connected to the main body housing, and the display housing is opened with respect to the main body housing in an expanded state, and the main body housing and the display housing are opposed to each other and closed. In a portable electronic information device configured to selectively take a folded state, a λ / 4 (where λ is a wavelength at a use frequency) extensible on a side surface of the display casing is provided. First of length
Antenna, first and second power supply terminals provided on the display housing and connected to power supply points of the first antenna when the first antenna extends and contracts, respectively, the main body housing A first portion having a length of λ / 2 and a second portion having a length of λ / 4 extending from one end of the first portion to a side surface of the display housing. The first antenna, the first contact portion electrically connected to the first antenna when the first antenna contracts, and the other end of the first portion electrically connected to each other in the folded state. A first contact part and a second contact part connected to the first contact part, wherein the first antenna is extended and the first antenna operates as a monopole antenna in the unfolded state, and the second contact part is in the folded state. The first antenna Portable electronic information characterized in that the first and second antennas form a loop antenna by being contracted and connected to the second antenna via the first and second contact portions. machine. 2. The portable electronic information device according to claim 1, further comprising first and second wireless transmission / reception circuits connected to the first and second power supply terminals, respectively. 3. A first and a second feeding line each having one end connected to the first and the second feeding terminal and having a length of λ / 2, and the first and the second feeding line. The wireless transmission / reception circuit commonly connected to the other end.
The described portable electronic information device. 4. The portable electronic information device according to claim 1, wherein the first contact portion and the second contact portion are capacitively connected to each other.