JP2011155531A - Antenna and portable radio terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna maintaining superior radio communication performance without being greatly affected by an electric conductor existing near the antenna. <P>SOLUTION: An antenna plate 3 and a conductive outer plate 15 which are arranged opposite to each other across an interval are connected together by a metal wall 20, thereby a U-shaped cross-sectional shape having a gap part inside is formed, and a frequency adjustment member 36 for adjusting a resonance frequency of the antenna 30 is arranged near the end of an U-shaped opening. As a result, even though the electric conductor comes close to the vicinity of the antenna 30, the resonance path of the antenna 30 is little affected by the electric conductor and superior radio communication performance can be maintained. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an antenna used for high-frequency wireless communication and a portable wireless terminal equipped with the antenna. In particular, the present invention relates to an antenna and a portable wireless terminal equipped with the antenna, which can maintain a wireless communication function both when the casing configured to be opened and closed is opened and closed.

  In recent years, in order to maintain the rigidity and strength of a portable wireless terminal while promoting the downsizing and thinning of the portable wireless terminal, a portable wireless terminal using a metal as a housing material has been provided.

  On the other hand, an antenna for wireless communication mounted on a portable wireless terminal has been built into the apparatus in order to prevent design damage and damage to the antenna during carrying. When the casing of the portable wireless terminal is made entirely of metal, the antenna built in the metal casing cannot transmit and receive radio waves in a good state and does not function as an antenna. For this reason, some techniques are disclosed in which the periphery of the antenna is formed of a non-conductive resin.

  For example, FIG. 1 of Patent Document 1 discloses an invention in which two inverted F-type antennas for wireless communication are projected from the top of a display housing formed of a metal bezel. According to the electronic device described in Patent Document 1, antenna performance can be improved by installing the antenna on a metal bezel.

  Furthermore, in the 0023 paragraph of Patent Document 1, as a modification of the embodiment shown in FIG. 1 of the same document, when a structure in which the metal bezel is housed in a synthetic resin housing is adopted, the reverse F There is a description that a mold antenna can be provided inside a casing made of synthetic resin.

  Further, in Patent Document 2, the antenna peripheral portion of the display housing formed to be openable and closable with respect to the main body housing is formed of a non-electric conductor, and the antenna is in a state where the display housing and the main body housing are closed. There is disclosed an electronic device in which a portion of a main body casing that will be close to is formed of a non-electric conductor insulator member.

  FIG. 20 shows the electronic device shown in FIG. An electronic device 900 illustrated in FIG. 20 is configured such that a display housing 920 and a main body housing 910 can be opened and closed via a hinge portion 930, and an antenna 922 for a wireless LAN is mounted on an upper portion of the display housing 920. It is a notebook computer.

  A key input unit 911 is disposed on the upper surface of the main body casing 910 of the electronic device 900, and various input / output devices and a power source for the CPU and its peripheral circuit groups and wireless communication circuits are provided in the main body casing 910. Etc. are built-in.

  In the display housing 920, a display portion 921 using a liquid crystal display panel or the like is disposed. Further, a Bluetooth or wireless LAN antenna 922 is built in the distal end portion of the display housing 920.

  The material of the display housing 920 is constituted by an electric conductor member 920a such as magnesium alloy except for the periphery of the mounting portion of the antenna 922. This maintains the strength of the housing and prevents leakage of electromagnetic waves and strong electromagnetic waves entering from the outside to cause the electronic device 900 to malfunction.

  In the electronic device 900 described in Patent Document 2, in order to reduce the loss of the antenna 922, the casing portion around the mounting portion of the antenna 922 is covered with an insulator member 920b such as a non-electric conductor plastic that transmits electromagnetic waves. It is configured.

  Further, even when the display housing 920 and the main body housing 910 of the electronic device 900 are closed, the display housing 920 and the main body housing 910 are closed in order to prevent the loss of the antenna 922 from increasing. In FIG. 5, a part of the main body housing 910 that the antenna 922 and the insulator member 920b approach is configured by an insulator member 910b such as non-electrically conductive plastic. The material of the main body housing 910 is constituted by an electric conductor member 910a such as a magnesium alloy except for the insulator member 910b and the key input portion 911.

  In the electronic device 900 described in Patent Document 2, by forming the peripheral portion of the antenna 922 with the insulator member 920b, the distance between the antenna 922 and the electric conductor member 920a can be separated by a certain distance or more. It is said that stable antenna characteristics can always be maintained.

  In addition, when the display housing 920 and the main body housing 910 of the electronic device 900 are closed, a portion where the antenna 922 becomes close is formed by the insulator member 910b, whereby the antenna 922 and the electric conductor member 910a are formed. It is said that the distance can be more than a certain distance, and stable antenna characteristics can always be maintained.

  Patent Document 3 discloses an invention for improving the mounting of a planar antenna built in a portable wireless device. In the portable wireless device described in Patent Document 3, the planar antenna is composed of a radiating conductor, a dielectric substrate, and a grounding conductor, and the radiating conductor and the grounding conductor are short-circuited by a through-hole, and the planar antenna installation conductor is A configuration is adopted in which a metal casing of a portable wireless device is placed in close contact with and electrically connected.

  In the portable wireless device described in Patent Document 3, since it is not necessary to solder the feeder line to the radiation conductor, the degree of freedom in the plane production process is increased, and the portable wireless device can be miniaturized. There are advantages.

JP 2006-303911 A Japanese Patent Laid-Open No. 2002-232220 JP-A-6-303163

  In the electronic device described in Patent Literature 1, when the display housing and the main body housing are closed, the antenna approaches the main body housing. Then, there is a problem that the antenna characteristics fluctuate due to the influence of the parts constituting the main body casing of the electronic device.

  In particular, when the main body casing is made of a metal material, when the display casing and the main body casing are closed, the antenna and the metal main body casing are in close proximity, which is very large in terms of antenna characteristics. Due to the influence, the frequency band operating as an antenna is greatly shifted, and there arises a problem that the wireless function cannot be used.

  Further, in the electronic device 900 described in Patent Document 2, the peripheral portion of the antenna 922 in the display housing 920 and the portion of the main body housing 910 that the antenna comes close to when the display housing is closed, It is necessary to form the insulating members 920b and 910b with low strength such as non-electrically conductive plastic. This becomes a factor that hinders the robustness of the electronic device 900.

  Further, as a measure against EMI / EMC (Electro Magnetic Interference / Electro Magnetic Compatibility), it is necessary to separately provide an electromagnetic shielding wall inside the insulator members 920b and 910b. It becomes a factor that inhibits conversion.

  In addition, in the planar antenna described in Patent Document 3, it is necessary to perform an operation of soldering the power supply line to a predetermined position, and a space for arranging the power supply line is required. There was a problem that man-hours increased.

  The present invention has been made in view of the above problems, and its object is to maintain good wireless communication performance without disposing an insulator member formed of a non-electric conductor in the vicinity of an antenna. An object of the present invention is to provide an antenna that can be used. Another object of the present invention is to provide a portable wireless terminal including an antenna capable of maintaining good wireless communication performance in both the opened state and the closed state of the display housing and the body housing. It is in.

  An antenna according to the present invention for solving the above-mentioned problems is an antenna used for high-frequency wireless communication, and by connecting an antenna plate and a conductive outer plate that are arranged to face each other with a gap therebetween, by a metal wall, A U-shaped cross-sectional shape having a gap inside is formed, and a frequency adjusting member for adjusting the resonance frequency of the antenna is arranged in the vicinity of the U-shaped opening end.

  In the antenna according to the present invention, the frequency adjusting member is made of a rod-shaped metal material, and is connected to the antenna plate in the entire area near the U-shaped opening end.

  A portable wireless terminal according to the present invention for solving the above-described problems is a portable wireless terminal in which a display housing and a main body housing are configured to be openable and closable via a hinge portion, and mounted with the antenna. In the display housing, a display unit held by an exterior top plate having conductivity and the antenna are juxtaposed, and the exterior top plate functions as a conductive outer plate of the antenna.

  In the portable wireless terminal according to the present invention, the hinge portion is configured to be able to open from a state in which the display housing and the main body housing are closed to a state in which the display housing and the main body housing are reversed 360 degrees.

  In the portable wireless terminal according to the present invention, a plurality of the antennas are juxtaposed at least at two or more of the left side, the right side, or the upper part of the display unit.

  In the portable wireless terminal according to the present invention, the plurality of arranged antennas are set to the same frequency band.

  In the portable wireless terminal according to the present invention, the plurality of arranged antennas are set to different frequency bands.

  According to the antenna for high-frequency wireless communication according to the present invention, the antenna resonance path can be formed in the gap inside the antenna by connecting the antenna plate and the conductive outer plate with the metal wall. Thereby, even when an electric conductor such as a metal member is close to the outside of the antenna, the influence of the metal member on the resonance path of the antenna can be reduced. Therefore, good wireless communication performance can be maintained regardless of the situation outside the antenna.

  Further, according to the antenna, the frequency adjusting member is made of a rod-shaped metal material and connected to the antenna plate in the entire area near the open end of the U-shape, so that the resonance path formed in the gap inside the antenna Since the added capacitance increases, the resonance frequency can be lowered while the antenna is small.

  According to the portable wireless terminal according to the present invention, the antenna according to the present invention is applied to a portable wireless terminal in which the display casing and the main body casing are configured to be openable and closable via the hinge portion. Good wireless communication performance can be maintained both when the body and the main body housing are opened and closed. In addition, by making the exterior top plate of the portable wireless terminal function as the conductive outer plate of the antenna, the portable wireless terminal can be reduced in size while maintaining good wireless communication performance.

  In addition, according to the portable wireless terminal, even when the hinge portion that can be opened from the closed state of the display housing and the main body housing to the state of being inverted 360 degrees is adopted, Good wireless communication performance can be maintained regardless of the open / closed state with the housing.

  Further, according to the portable wireless terminal, a plurality of antennas can be juxtaposed in at least two places on the left side, the right side, or the upper part of the display unit of the portable wireless terminal, thereby supporting a plurality of wireless communication applications. it can.

  In addition, according to the portable radio terminal, by setting a plurality of arranged antennas in the same frequency band, MIMO (Multiple Input Multiple Output) compatible and diversity compatible, faster wireless communication and more reliable wireless Communication can be performed.

  Moreover, according to the said portable radio | wireless terminal, it can respond to a some radio | wireless communication application by setting the several antenna arrange | positioned to a respectively different frequency band.

It is a perspective view of the portable radio | wireless terminal carrying the antenna which concerns on this invention. It is A-A 'sectional drawing of the display housing | casing shown in FIG. It is a figure explaining the process of attaching a frequency adjustment member to the edge part of an antenna board. It is a figure explaining the process of attaching a feed terminal to an antenna board. It is a figure explaining the process of attaching an antenna board to a metal wall. It is a figure explaining the frequency characteristic of the reflection loss (S11) of the antenna in the state which opened the display housing | casing to 90 degree | times. It is a figure explaining the frequency characteristic of the reflection loss (S11) of the antenna in the state which closed the display housing | casing and the main body housing | casing. It is a figure showing the radiation pattern of the electromagnetic wave in the state which opened the display housing | casing at 90 degree | times. It is sectional drawing of the antenna which shows the state which set the thickness of the frequency adjustment member thin to ta (mm). It is sectional drawing of the antenna which shows the state which set the thickness of the frequency adjustment member to tb (mm). It is sectional drawing of the antenna which shows the state which set the thickness of the frequency adjustment member thick to tc (mm). It is a figure explaining the relationship between the thickness t of a frequency adjustment member, and the resonant frequency of an antenna. It is sectional drawing which shows the state which attached the frequency adjustment member to the opening end (position of da) of an antenna. It is sectional drawing which shows the state which attached the frequency adjustment member in db (mm) back from the opening end of the antenna. It is sectional drawing which shows the state which attached the frequency adjustment member to dc (mm) back from the opening end of the antenna. It is a figure explaining the relationship between the attachment position of a frequency adjustment member, and the resonant frequency of an antenna. It is a figure explaining embodiment with which a plurality of antennas were carried in a portable radio terminal. FIG. 18 is a B-B ′ cross-sectional view of the display housing illustrated in FIG. 17. It is a figure explaining embodiment which mounted the antenna in the mobile telephone. It is an external appearance perspective view of the electronic device carrying the conventional antenna.

  The configuration and operation of an antenna according to the present invention and a portable radio terminal equipped with the antenna will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.

  FIG. 1 is a perspective view showing an embodiment of a portable wireless terminal equipped with an antenna according to the present invention. A portable wireless terminal 10 shown in FIG. 1 is configured such that a display housing 14 and a main body housing 12 can be opened and closed via a hinge portion 18, and an antenna 30 for wireless communication is mounted on a part of the display housing 14. It is a notebook computer. The antenna 30 according to the present invention is not only applied to the notebook personal computer type portable wireless terminal 10 as shown in FIG. 1, but can also be applied to a small wireless communication terminal such as a mobile phone. .

  A key input unit 13 for a user to input characters, commands, and the like is disposed on the upper surface of the main body housing 12 in the mobile wireless terminal 10 shown in FIG. Inside the main body housing 12, various input / output devices such as a power source, a CPU and its peripheral circuit group, and a wireless communication circuit (not shown) are incorporated. The exterior of the main body housing 12 and the display housing 14 is preferably made of a magnesium alloy, an aluminum alloy, or other metal in order to ensure strength during carrying and to prevent EMI / EMC.

  In the display housing 14 of the portable wireless terminal 10 shown in FIG. 1, a display unit 16 that displays characters and images using a liquid crystal display panel or the like and an antenna 30 for performing wireless communication are juxtaposed. An antenna 30 shown in FIG. 1 is used for high-frequency wireless communication such as Bluetooth (registered trademark), wireless USB, and wireless LAN. In the embodiment shown in FIG. 1, the antenna 30 is juxtaposed on the right side of the display unit 16, but it can also be juxtaposed on the left side or upper part of the display unit 16. The configuration of the antenna 30 will be described with reference to FIG.

  FIG. 2 is a cross-sectional view of the display housing 14 shown in FIG. As shown in FIG. 2, the antenna 30 is configured by standing a metal wall 20 on a metal conductive outer plate 15 in parallel with the display unit 16 and connecting an antenna plate 32 to the metal wall 20. ing. In this way, the conductive outer plate 15, the metal wall 20, and the antenna plate 32 form a U-shaped cross-sectional shape, and the gap surrounded by the conductive outer plate 15, the metal wall 20, and the antenna plate 32. A part (cavity) is formed. A cover body 17 is arranged on the left side of the display unit 16.

  In the embodiment shown in FIG. 2, the metal exterior top plate (conductive outer plate 15) of the display housing 14 holds the display unit 16 and the antenna 30. The metal exterior top plate of the display housing 14 is caused to function as the conductive outer plate 15 of the antenna 30. Further, as shown in FIG. 2, a power feeding terminal 34 is projected from the antenna plate 32 toward the conductive outer plate 15 inside the gap. The power supply terminal 34 is a terminal for supplying power to the antenna plate 32 from the wireless communication circuit.

  The antenna 30 shown in FIG. 2 has a gap formed inside the U-shaped cross-sectional shape, so that the conductive property is obtained from the U-shaped opening end of the antenna plate 32 via the metal wall 20. A resonance path is formed by a path called an opening end of the outer plate 15. The resonance frequency at this time is a frequency in which the distance between the opening end of the gap and the metal wall 20 is ¼ wavelength.

  Further, as shown in FIG. 2, by arranging a frequency adjusting member 36 for adjusting the resonance frequency of the antenna 30 in the vicinity of the U-shaped opening end of the antenna 30, a capacitance is added to the resonance path. The resonance path can be shifted by changing the electrical length of the resonance path. That is, by changing the size and arrangement of the frequency adjusting member 36, it is possible to adjust the capacitance value to be added, and the resonance frequency can be adjusted. For example, the larger the capacitance value added to the resonant circuit, the longer the electrical length of the resonant circuit and the lower the resonant frequency.

  As the frequency adjusting member 36, a metal protrusion having conductivity or a metal rod-shaped member having a square cross section can be used. The frequency adjusting member 36 can be disposed in a part near the U-shaped opening end, or can be connected to the antenna plate 32 in the entire area near the U-shaped opening end. Since the resonance path of the antenna 30 according to the present invention is formed in the gap, even when a metal member is close to the antenna 30, the influence of the proximity of the metal member on the resonance path is small. That's it.

  For example, when the display housing 14 is closed to a position where the display housing 14 and the main body housing 12 overlap each other, the metal conductive outer plate constituting the main body housing 12 is close to the antenna 30. However, the difference between the resonance frequency of the antenna 30 when the display housing 14 and the main body housing 12 are opened is small. Therefore, good communication can be performed in both forms.

  According to the present invention, unlike the prior art, it is not necessary to form the housing adjacent to the antenna or the housing that will be close to the antenna with a non-electric conductor or an insulator member that easily transmits electromagnetic waves. Therefore, it is possible to use a metal outer plate that is excellent in strength and effective for EMI / EMC countermeasures.

  Next, an example of an assembly procedure of the antenna 30 will be described with reference to FIGS. First, as shown in FIG. 3, a metallic rod-shaped frequency adjusting member 36 is attached to the end of an antenna plate 32 formed of a metal plate by screwing or spot welding. The interval between screw stop and spot welding is preferably equal to or less than 1/10 wavelength of the frequency used in wireless communication.

  Next, as shown in FIG. 4, the power supply terminal 34 is attached to a predetermined position of the antenna plate 32. The power supply terminal 34 is made of an elastic metal part such as a spring or a leaf spring. The power supply terminal 34 is electrically connected to a radio circuit (not shown) via a coaxial cable (not shown). By supplying power to the antenna plate 32 using the power supply terminal 34, assembly work and repair work can be easily performed. Furthermore, there is no need for a separate space for soldering or the like.

  Next, as shown in FIG. 5, the antenna plate 32 to which the frequency adjusting member 36 and the feeding terminal 34 are attached is screwed or attached to the metal wall 20 erected from the conductive outer plate 15 of the display housing 14. Install by spot welding. In this manner, the antenna 30 can be assembled to the display housing 14 as shown in the cross-sectional view of FIG.

  Next, the frequency characteristics of the antenna 30 according to the present invention will be described with reference to FIGS. FIG. 6 shows the frequency of the antenna reflection loss (S11) viewed from the radio circuit side with the display housing 14 and the main body housing 12 opened to 90 degrees with the hinge portion 18 of the portable wireless terminal 10 as the center. It represents a characteristic. FIG. 7 shows the frequency characteristics of the antenna reflection loss (S11) as seen from the radio circuit side in a state where the display housing 14 and the main body housing 12 of the portable wireless terminal 10 are closed.

  As shown in FIG. 6, when the display housing 14 and the main body housing 12 are opened, the reflection loss of the antenna 30 is about 2.54 GHz and a minimum value of −13 dB is obtained. On the other hand, when the display housing 14 and the main body housing 12 are closed, a minimum value of −23 dB is obtained at 2.9 GHz as shown in FIG.

  As shown in FIGS. 6 and 7, in the antenna 30 according to the present invention, the resonance frequency is substantially the same in the opened state and the closed state of the display housing 14 and the main body housing 12. The wireless communication can be performed in both the opened state and the closed state of the display housing 14 and the main body housing 12. In general, if the reflection loss of the antenna 30 is −10 dB or less, the practicality as an antenna for wireless communication is sufficient. Therefore, when the frequency characteristics of the reflection loss shown in FIG. 6 and FIG. The frequency band of 2.5 to 2.8 GHz can be used.

  Next, the directivity when the antenna 30 is applied to the portable wireless terminal 10 will be described with reference to FIG. FIG. 8 is a diagram showing a radiation pattern in the XY plane shown in FIG. 8 with the main body housing 12 placed on a table with the display housing 14 of the portable wireless terminal 10 opened at 90 degrees. is there.

  As shown in FIG. 8, the antenna 30 has good omnidirectionality in the XY plane without being affected by the display unit 16 and the conductive outer plate 15.

  Next, the relationship between the dimension of the frequency adjusting member 36 disposed near the U-shaped opening end of the antenna 30 and the resonance frequency of the antenna 30 will be described with reference to FIGS.

  FIG. 9 is a cross-sectional view of the antenna 30 in a state where the thickness of the frequency adjusting member 36 is set as thin as ta (mm). FIG. 10 is a cross-sectional view of the antenna 30 in a state where the thickness of the frequency adjusting member 36 is set to tb (mm) thicker than ta (mm). FIG. 11 is a cross-sectional view of the antenna 30 in a state where the thickness of the frequency adjusting member 36 is set to tc (mm) that is thicker than tb (mm).

  FIG. 12 is a diagram illustrating a change in the resonance frequency of the antenna 30 when the thickness of the frequency adjusting member 36 is changed to ta, tb, and tc (mm). As shown in FIG. 12, the frequency used in the antenna 30 can be adjusted by changing the thickness of the frequency adjusting member 36.

  In addition, the thickness of the frequency adjustment member 36 shown in FIG. 12 is ta = 0, tb = 1.0, and tc = 1.5 (mm), respectively. Thus, by increasing the thickness of the frequency adjusting member 36, the capacitance added to the resonance circuit increases, and the resonance frequency can be lowered.

  Next, the relationship between the mounting position of the frequency adjusting member 36 disposed near the U-shaped opening end of the antenna 30 and the resonance frequency in the antenna 30 will be described with reference to FIGS.

  FIG. 13 is a cross-sectional view showing a state in which the frequency adjustment member 36 is attached to the U-shaped opening end (the position of da) of the antenna 30. FIG. 14 is a cross-sectional view illustrating a state in which the frequency adjustment member 36 is attached to the back of the antenna 30 from the U-shaped opening end by db (mm). FIG. 15 is a cross-sectional view showing a state in which the frequency adjustment member 36 is attached to the back of dc (mm) from the U-shaped opening end, which is further back than db (mm).

  FIG. 16 is a diagram illustrating a change in the resonance frequency of the antenna 30 when the attachment position of the frequency adjusting member 36 is changed to da, db, dc (mm). As shown in FIG. 16, the frequency used in the antenna 30 can be adjusted by changing the mounting position of the frequency adjusting member 36.

  The thicknesses of the frequency adjusting members 36 shown in FIG. 16 are all set to t = 1.5 (mm), and their mounting positions are da = 0, db = 2.5, dc = 5.0 (mm). This is the case. Thus, by arranging the mounting position of the frequency adjusting member 36 on the back side of the U-shaped opening end of the antenna 30, the capacitance added to the resonance circuit increases and the resonance frequency is lowered. Can do.

  The antenna according to the present invention can be applied to notebook computers, mobile phones, and other portable wireless terminals. In general, a portable terminal is preferred that has a small outer size and a display unit that is somewhat wide. If it does so, it will become difficult to ensure the space which arrange | positions an antenna required for a portable radio | wireless terminal from various restrictions. In particular, when the space that can be used as an antenna is small, a sufficient resonance path length cannot be obtained, and the resonance frequency tends to shift to the high frequency side.

  In the present invention, by arranging the frequency adjusting member 36 in the vicinity of the U-shaped opening end of the antenna 30, it is possible to add capacitance to the resonance path. Thereby, the electrical length of the resonance path can be changed, and the resonance frequency can be shifted in the direction of low frequency. Therefore, the antenna 30 can be reduced in size, and the portable radio terminal 10 equipped with the antenna 30 can be reduced in size.

  Next, an embodiment in which a plurality of antennas are mounted on a portable wireless terminal will be described with reference to FIG. FIG. 17 is a perspective view showing an embodiment in which three antennas 30, 30 </ b> A, and 30 </ b> B are mounted on the display housing 14 of the notebook personal computer type portable wireless terminal 110. In addition, the same code | symbol is attached | subjected about the element same as the structure of the portable radio | wireless terminal 10 demonstrated in FIG. 1, and the description is abbreviate | omitted.

  As shown in FIG. 17, the antennas 30 and 30 </ b> A are juxtaposed on the left and right sides of the display unit 16, and the antenna 30 </ b> B is juxtaposed above the display unit 16. Among these, the resonance frequency of a plurality of antennas can be set to the same value and used for a wireless LAN (2.4 GHz band). In this case, it is possible to support MIMO (Multiple Input Multiple Output) and diversity.

  It is also possible to set the resonance frequencies of a plurality of antennas to the same value, for example, to use the antenna 30 for wireless LAN (2.4 GHz band) and the antenna 30A for Bluetooth (2.4 GHz band). it can. Further, the resonance frequency of the antenna can be set to a different value, such as using the antenna 30B for wireless USB (3.1 to 10.6 GHz band).

  18 is a B-B ′ cross-sectional view of the display housing 14 shown in FIG. 17. In addition, the same code | symbol is attached | subjected about the element same as the structure of the portable radio | wireless terminal 10 demonstrated in FIG. 2, and the description is abbreviate | omitted.

  As shown in FIG. 18, the antenna 30 </ b> A has the same configuration as the antenna 30. When the resonance frequency of the antenna 30A is set to a value different from the resonance frequency of the antenna 30, the thickness and the mounting position of the frequency adjustment member 36 of the antenna 30A are changed as shown in FIGS. You can also

  Next, an embodiment in which the antenna according to the present invention is mounted on a portable wireless terminal 210 such as a cellular phone will be described with reference to FIG. A portable wireless terminal 210 shown in FIG. 19 is configured such that a display housing 214 and a body housing 212 can be opened and closed 360 degrees via a hinge portion 218, and an antenna 230 for wireless communication is provided on a part of the display housing 214. It is an on-board mobile phone.

  A key input unit 213 for a user to input numbers, characters, commands, and the like is disposed on the upper surface of the main body housing 212 in the portable wireless terminal 210 shown in FIG. Inside the main body housing 212, a power supply, a CPU and its peripheral circuit group, and various input / output devices such as a wireless communication circuit (not shown) are incorporated. The exteriors of the main body housing 212 and the display housing 214 are preferably made of a magnesium alloy, an aluminum alloy, or other metal for securing strength during carrying and taking measures against EMI / EMC.

  In a display housing 214 of the portable wireless terminal 210 shown in FIG. 19, a display unit 216 that displays characters and images using a liquid crystal display panel or the like and an antenna 230 for performing wireless communication are juxtaposed. The antenna 230 illustrated in FIG. 19 is used for high-frequency wireless communication such as Bluetooth (registered trademark), wireless USB, and wireless LAN. In the example shown in FIG. 19, the antenna 230 is juxtaposed on the upper part of the display unit 216, but can be juxtaposed on the right side or the left side of the display unit 216. It is also possible to arrange a plurality of antennas 230. The configuration of the antenna 230 is the same as that shown in FIG. Therefore, the description is omitted.

  The antenna according to the present invention can be applied to the above-described notebook personal computer and mobile phone, as well as a keyboard, a tablet, a mouse, a trackball having a wireless communication function, an audio device, a visual device, a medical device, and other wireless devices. It can be applied to a device that performs communication.

DESCRIPTION OF SYMBOLS 10,210 Portable radio | wireless terminal 12,212,910 Main body housing | casing 13,213,911 Key input part 14,214,920 Display housing | casing 15 Conductive outer plate 16,216,921 Display part 17 Cover body 18,218,930 Hinge part 20 Metal wall 30, 30A, 30B, 230, 922 Antenna 32 Antenna plate 34 Feeding terminal 36 Frequency adjusting member 900 Electronic device 910a, 920a Electrical conductor member 910b, 920b Insulator member (non-electric conductor member)

Claims (7)

  An antenna used for high-frequency wireless communication, and a U-shaped cross-sectional shape having a gap inside by connecting a conductive outer plate and an antenna plate arranged facing each other with a gap therebetween And a frequency adjusting member for adjusting the resonance frequency of the antenna is disposed in the vicinity of the U-shaped opening end.   2. The antenna according to claim 1, wherein the frequency adjusting member is made of a rod-shaped metal material and is connected to the antenna plate in the entire area near the U-shaped opening end. A display housing and a main body housing are configured to be openable and closable via a hinge portion, and are portable wireless terminals equipped with the antenna according to claim 1 or 2,
A portable radio characterized in that a display unit held by an exterior top plate having conductivity and the antenna are juxtaposed in the display casing, and the exterior top plate functions as a conductive outer plate of the antenna. Terminal.   The portable wireless terminal according to claim 3, wherein the hinge portion can be opened from a state in which the display housing and the main body housing are closed to a state in which the display housing is inverted 360 degrees.   5. The portable wireless terminal according to claim 3, wherein a plurality of the antennas are juxtaposed in at least two or more of a left side, a right side, or an upper part of the display unit.   The portable radio terminal according to claim 5, wherein the plurality of arranged antennas are respectively set to the same frequency band.   The portable radio terminal according to claim 5, wherein the plurality of arranged antennas are set to different frequency bands.

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