WO2002039542A1 - Dispositif d'antenne et terminal portable - Google Patents

Dispositif d'antenne et terminal portable Download PDF

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Publication number
WO2002039542A1
WO2002039542A1 PCT/JP2000/007637 JP0007637W WO0239542A1 WO 2002039542 A1 WO2002039542 A1 WO 2002039542A1 JP 0007637 W JP0007637 W JP 0007637W WO 0239542 A1 WO0239542 A1 WO 0239542A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
mobile phone
antenna device
substrate
plate
Prior art date
Application number
PCT/JP2000/007637
Other languages
English (en)
Japanese (ja)
Inventor
Hideaki Shoji
Yasuhito Imanishi
Toru Fukasawa
Hiroyuki Ohmine
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to CN00818025.3A priority Critical patent/CN1229893C/zh
Priority to EP00970214A priority patent/EP1335448A4/fr
Priority to US10/149,431 priority patent/US6677907B2/en
Priority to JP2002541755A priority patent/JPWO2002039542A1/ja
Priority to PCT/JP2000/007637 priority patent/WO2002039542A1/fr
Publication of WO2002039542A1 publication Critical patent/WO2002039542A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Definitions

  • the present invention relates to an antenna device and a mobile terminal, and more particularly to an antenna device built in a mobile phone and a mobile phone using the antenna device. Background art.
  • an antenna built in a housing of a mobile phone has been known as an antenna for transmission and reception of the mobile phone.
  • These antennas are classified into linear antennas and plate antennas according to their characteristics. '
  • FIG. 20 is a schematic plan view of a mobile phone incorporating a dipole antenna, which is one of the conventional linear antennas.
  • a conventional mobile phone l x has a housing 10 and an antenna device 3X housed in the housing 10.
  • the antenna device 3 x has a substrate 11 and a dipole antenna 12 1 provided on the substrate 11.
  • the dipole antenna 1 2 JL has two meander-shaped antenna portions 1 2 1 a and 1 2 1 b, and the antenna portions 1 2 1 a and 1 2 1 b are connected to the feed point 12, respectively.
  • the electrical length of the dipole antenna 1 2 1 is ⁇ / 2.
  • the direction in which the dipole antenna 121 extends (the direction indicated by the arrow 125) forms an angle of approximately 30 degrees with the vertical direction.
  • the dipole antenna 1221 is known as an antenna capable of reducing the polarization loss of 1 "with respect to the polarization perpendicular to the ground (vertical polarization) during a call.
  • FIG. 21 is a diagram showing a radiation pattern of the conventional dipole antenna shown in FIG. As shown in FIG. 21, when the mobile phone 1X is upright, and particularly when the electrical length of the antenna is ⁇ 2 XA (A is an integer), the solid lines 1 3 1 and 1 3 2 Null points 1 3 4 of the radiation pattern shown by become the horizontal plane. As a result, there was a problem that Ritsubaki became smaller.
  • Figure 22 shows the electrical length of the conventional dipole antenna and the antenna length. 6 is a graph showing a relationship with a current distribution. As shown in FIG. 22, in a dipole antenna having an electric length of 1 to 2, the maximum value of the current distribution exists at a portion where the electric length of the antenna is no. 4, that is, at the center of the antenna. Since this part is easily touched by the hand, there is a problem that the antenna gain is particularly deteriorated when touched by the hand.
  • FIG. 23 is a plan view of a portable telephone having a conventional plate antenna.
  • the mobile phone ly has a housing 10 and an antenna device 3 y housed in the housing 10.
  • the antenna device 3y includes a substrate 11 and a plate-like antenna 122 provided on the substrate 11.
  • the plate antenna 1 2 2 is connected to the feeding point 1 2.
  • Such a plate antenna 122 is an antenna that easily transmits and receives both vertically and horizontally polarized waves with respect to the ground.
  • the current near the feeding point is dispersed, there is an advantage that the amount of gain deterioration when a finger is brought into contact with the antenna is smaller than that of a linear antenna.
  • the plate antenna 122 for example, in the case of a patch antenna, the sum of the lengths of the entire circumference of the antenna is required; about L, so that the antenna size becomes large, and the mobile phone 1y itself becomes large. There was a problem.
  • the present invention has been made to solve the above-described problems, and is an antenna device that can transmit and receive both vertically polarized waves and horizontally polarized waves, is small, and has little deterioration in gain during communication. And mobile terminals. . DISCLOSURE OF THE INVENTION
  • An antenna device includes a substrate, and an antenna provided on the substrate and having an electrical length of approximately ( ⁇ / 2) XA (A is an integer).
  • the antenna includes a plate-like antenna located at a portion where the electrical length from the end is approximately ( ⁇ / 2) ⁇ ( ⁇ is an integer), and a wire-like antenna connected to the plate-like antenna.
  • the linear antenna section mainly transmits and receives either the vertically polarized wave or the horizontally polarized wave
  • the plate antenna section transmits and receives both the horizontally polarized wave and the vertically polarized wave. be able to.
  • vertical and horizontal polarization Can also be transmitted and received, and becomes a gain antenna.
  • the electrical length of the antenna is approximately ( ⁇ ⁇ 2) XA (A is an integer)
  • the electrical length from the end of the antenna is approximately LZ 4 + ( ⁇ / 2) XB (B is an integer).
  • the plate-shaped antenna portion is provided in this portion, the current can be dispersed. Therefore, even when a finger or the like is placed on this portion, deterioration of gain can be reduced.
  • the antenna since the antenna includes the linear antenna portion, the antenna can be downsized as compared with a case where the antenna is configured only with the plate antenna portion.
  • a high gain can be obtained even during a call, the gain can be secured when the terminal is upright, and a small antenna can be provided.
  • the linear antenna section includes at least one selected from the group consisting of a monopole antenna, a zigzag antenna, a meandering antenna and a helical antenna.
  • the substrate has a main surface having conductivity.
  • the antenna further includes a connection connected to the main surface of the substrate. In this case, since the antenna is connected to the main surface having conductivity, an image is formed on the substrate. As a result, the electrical length of the antenna is almost twice the physical length of the antenna, and the physical length of the antenna can be shortened. Therefore, the size of the antenna device can be reduced.
  • the substrate has a main surface and a side surface connected to the main surface, and the antenna is provided on the side surface.
  • the antenna is provided on the side surface.
  • a portable terminal includes a housing and an antenna device built in the housing.
  • the antenna device includes a substrate, and an antenna provided on the substrate and having an electrical length of approximately ( ⁇ / 2) X A (A is an integer).
  • the antenna has a plate-shaped antenna part whose electric length from the end is approximately; 1 + 4 + ( ⁇ / 2) ⁇ ⁇ (where ⁇ is an integer), and a wire connected to the plate-shaped antenna part. Antenna part.
  • the linear antenna unit mainly transmits and receives either the vertical polarization or the horizontal polarization
  • the plate antenna unit transmits and receives both the horizontal polarization and the vertical polarization. it can.
  • both vertical and horizontal polarization The mobile terminal can transmit and receive and has a high-gain antenna device.
  • the antenna since the antenna includes the linear antenna portion, the antenna and the portable terminal can be downsized as compared with a case where the antenna is constituted only by the plate antenna portion. Further, since the antenna device is built into the housing, the antenna device is less affected by a human body. As a result, deterioration of the gain can be prevented.
  • FIG. 1 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 1 of the present invention.
  • FIG. 2 is a side view of the mobile phone as viewed from the direction indicated by arrow II in FIG.
  • FIG. 3 is a graph showing the relationship between the electrical length of the antenna and the current in the mobile phone shown in FIGS.
  • FIG. 4 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 2 of the present invention.
  • 5 and 5 are side views of the mobile phone viewed from a direction indicated by an arrow V in FIG.
  • FIG. 6 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 3 of the present invention.
  • FIG. 7 is a side view of the mobile phone as viewed from the direction indicated by arrow VII in FIG.
  • FIG. 8 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 4 of the present invention.
  • FIG. 9 is a side view of the mobile phone as viewed from the direction indicated by arrow IX in FIG.
  • FIG. 10 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 5 of the present invention.
  • FIG. 11 is a side view of the mobile phone as viewed from the direction indicated by arrow XI in FIG.
  • FIG. 12 is a schematic plan view of a portable telephone tongue device having an antenna device according to Embodiment 6 of the present invention.
  • FIG. 13 is a side view of the mobile phone as viewed from the direction indicated by arrow XIII in FIG. f
  • FIG. 14 is a diagram illustrating a process of measuring a radiation pattern on the YZ plane.
  • Fig. 15 shows the measurement of the radiation pattern on the YZ plane.
  • FIG. 16 is a diagram showing a process of measuring a radiation pattern on the YZ plane.
  • FIG. 17 is a graph showing the radiation pattern on the YZ plane of the product of the present invention.
  • FIG. 18 is a graph showing the radiation pattern on the YZ plane of the conventional mobile phone shown in FIG.
  • FIG. 19 is a graph showing the radiation pattern on the YZ plane of the conventional mobile phone shown in FIG.
  • FIG. 20 is a schematic plan view of a conventional mobile phone having a built-in dipole antenna.
  • FIG. 21 is a diagram showing a radiation pattern of the mobile phone shown in FIG.
  • FIG. 22 is a graph showing the relationship between the electrical length of the antenna shown in FIG. 20 and the current distribution on the antenna element.
  • FIG. 23 is a schematic plan view of a mobile phone having a conventional plate antenna. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 1 of the present invention.
  • FIG. 2 is a side view of the mobile phone as viewed from the direction indicated by arrow II in FIG.
  • the mobile phone 1a has a housing 10 and an antenna device 3a built in the housing 10.
  • the antenna device 3a includes a substrate 11 and an antenna 21 provided on the substrate 11 and having an electrical length of (; LZ 2) XA (A is an integer).
  • the antenna 21 has a plate-shaped antenna as a plate-shaped antenna portion whose electric length from the end 21 d is approximately 4+ is Z2) XB (B is an integer).
  • An antenna 21 b and main line antennas 21 a and 21 c as linear antennas connected to the plate antenna 21 b.
  • the substrate 11 is formed by depositing a highly conductive metal such as copper on a predetermined insulating substrate. Note that the metal formed on the insulating substrate may be replaced with a metal having substantially the same conductivity as copper.
  • the substrate 11 extends in the longitudinal direction and has a substantially rectangular shape.
  • the antenna 21 is provided so as to extend along the short side of the substrate 11.
  • the antenna 21 has a plate antenna 21 b serving as a plate antenna located at a central portion, and meander line antennas 21 a and 21 c serving as linear antennas located on both sides thereof.
  • the plate antenna 2 1 b is connected to the feeding point 12.
  • the Mekenda line antennas 21a and 21c and the plate antenna 21b are both provided on the main surface 11a of the substrate 11 and face the main surface 11a.
  • the plate antenna 21 b is connected to a wireless unit (not shown) via a feed point 12.
  • a wireless unit not shown
  • the direction in which the antenna 21 extends is almost 30 ° (zenith angle 30.) with respect to the vertical direction.
  • the antenna 21 is housed in the housing 10.
  • FIG. 3 is a graph showing the relationship between the electrical length of the antenna and the current in the mobile phone 1a shown in FIGS.
  • regions 2 2 1 a and 2 2 1 c are regions where meander line antennas 2 1 a and 2 1 c are present
  • region 2 2 1 b is a plate-like antenna 2 1 b Corresponds to the area where exists.
  • the plate-shaped antenna 21b is provided in the region 2221b where the current increases, it can be seen that the increase in the current value in this portion is suppressed.
  • the meander line antennas 21a and 21c transmit and receive one of the vertical and horizontal polarizations
  • the plate antenna 21b is the vertical antenna. And transmit and receive both horizontally polarized waves.
  • both vertically and horizontally polarized waves can be transmitted and received, and the deterioration of gain can be suppressed.
  • the current value can be reduced at the center of the antenna, so that the gain can be prevented from deteriorating even if a finger or the like touches this portion.
  • the antenna 21 since the antenna 21 is built in the housing 10, the antenna 21 does not come into direct contact with the human body. As a result, the antenna 21 may be affected by the human body. And the gain can be prevented from deteriorating due to the human body.
  • FIG. 4 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 2 of the present invention.
  • FIG. 5 is a side view of the mobile phone as viewed from the direction indicated by arrow V in FIG.
  • antenna 21 is provided on zenith surface 11 b as a side surface of substrate 11. This is different from the antenna device 3a shown in the first embodiment in that The antenna 21 is connected to the feeding point 12.
  • the antenna device 3b and the mobile phone 1b thus configured have the same effects as the antenna device 3a and the mobile phone 1b described in the first embodiment.
  • the zenith surface Since antenna 21 is provided on 1b, the area that can be used on main surface 11a is larger than that in embodiment 1 where antenna 21 is provided on main surface 11a. . As a result, there is an effect that other parts can be placed on the main surface 1a.
  • FIG. 6 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 3 of the present invention.
  • FIG. 7 is a side view of the mobile phone viewed from a direction indicated by an arrow VII in FIG.
  • linear antenna portions of antennas 23 have helical antennas 23a and 23c. c in that it is different from the mobile phone 1 a and the antenna device 3 a shown in the first embodiment.
  • the helical antennas 23a and 23c are formed in a spiral shape, and one end thereof is connected to the plate antenna 21b.
  • the helical antennas 23a and 23c are provided in a spiral shape and are not in direct contact with the substrate 11.
  • the mobile phone lc has a housing 10 and an antenna device 3c built in the housing 10.
  • the antenna device 3c includes a substrate 11 and an antenna 23 provided on the substrate 11 and having an electrical length S (E 2) XA (A is an integer).
  • the antenna .23 has a plate-like antenna 2 1b as a plate-like antenna located at a portion where the electric length from the end 23 d is approximately; ( ⁇ / 2) ⁇ ⁇ ( ⁇ is an integer).
  • a helical antenna 23 a and 2 ⁇ 3 c as a linear antenna portion is to the.
  • the antenna device 3c and the mobile phone 1c thus configured have the same effects as the antenna device 3a and the mobile phone 1c described in the first embodiment.
  • FIG. 8 is a schematic plan view of a mobile phone having an antenna device according to Embodiment 4 of the present invention.
  • FIG. 9 is a side view of the mobile phone as viewed from the direction indicated by arrow IX in FIG.
  • antenna 24 is configured by zigzag antennas 24 a and 24 c and plate antenna 21 b. This is different from the antenna 21 shown in the first embodiment.
  • the mobile phone Id has the housing 10 and the antenna device 3 d built in the housing 10.
  • the antenna device 3d includes a substrate 11 and an antenna 24 provided on the substrate 11 and having an electrical length of ( ⁇ / 2) X A (A is an integer).
  • the antenna 24 includes a plate antenna 21b as a plate antenna portion whose electric length from the end 24d is approximately ⁇ 4 + ( ⁇ / 2) XB (B is an integer), and a plate antenna 21b. And zigzag antennas 24a and 24c as linear antenna portions connected to the antenna.
  • the antenna device 3d and the mobile phone 1d configured as described above have the same effects as the antenna device 3a and the mobile phone 1a described in the embodiment 1.
  • FIG. 10 is a plan view of a mobile phone having an antenna device according to Embodiment 5 of the present invention.
  • FIG. 11 is a side view of the mobile phone as viewed from the direction indicated by arrow XI in FIG.
  • the mobile phone 1 e has a housing 1 ⁇ and an antenna device 3 e built in the housing 10.
  • the antenna device 3e includes a substrate 11 and an antenna 25 provided on the substrate 11 and having an electrical length of ( ⁇ // 2) ⁇ ( ⁇ is an integer).
  • the antenna 25 has a connection portion 25 a as a plate antenna portion located at a portion of L_ 4 + ( ⁇ / 2) XB (B is an integer) having an electrical length substantially equal to the end portion 25 d, and a plate antenna 25. b. and connected to the connection part 25a via the plate antenna 25b. It has a zigzag antenna 25c as a linear antenna unit.
  • Antenna 25 is provided on main surface 11 a of substrate 11.
  • the antenna 25 has a connection part 25a connected to the main surface 11a, a plate antenna 25b connected to the connection part 25a, and a zigzag connected to the plate antenna 25b. It has an antenna 25c.
  • the connecting portion 25a is formed of a plate antenna, and connects the conductive main surface 11a and the plate antenna 25b.
  • the connection part 25 a is connected to the power supply point 12.
  • the plate antenna 25b is provided so as to face the main surface 11a, one end of which is connected to the connecting portion 25a, and the other end of which is connected to the zigzag antenna 25c.
  • the connecting portion 25a Since the connecting portion 25a is connected to the main surface 11a having conductivity, an image of the antenna is also formed on the main surface 11a.
  • the physical length of the antenna 25 is ( ⁇ / 4) ⁇ ( ⁇ is an integer), but the electrical length is ( ⁇ / 2) X A (A is an integer).
  • the antenna device 3e and the mobile phone 1e configured as described above have the same effects as the antenna device 3a and the mobile phone 1a described in the first embodiment. Further, since the physical length of the antenna 25 is reduced, the antenna device 3 e and the mobile phone 1. e can be downsized.
  • a monopole antenna, a meander line antenna, and a helical antenna may be connected to the plate antenna 25b.
  • FIG. 12 is a plan view of a mobile phone having an antenna device according to Embodiment 6 of the present invention.
  • FIG. 13 is a side view of the mobile phone as viewed from a direction indicated by an arrow XIII line in FIG.
  • the mobile phone 1 f has a housing 10 and an antenna device 3 f built in the housing 10.
  • the antenna device 3f includes a substrate 11 and an antenna 26 provided on the substrate 11 and having an electrical length of ( ⁇ 2) XA (A is an integer).
  • the antenna 26 has a plate-like antenna 26 c serving as an antenna part, which is located at a position of approximately IZ4 + (1/2) XB (B is an integer) from the end 26 e.
  • the plate antenna 26 c is connected to the feeding point 12, and is connected to the connection part 26 b.
  • the connecting portion 26b connects the plate antenna 26c to the main surface 11a having conductivity.
  • the meander line antennas 26a and 26d and the plate antenna 26c are both provided so as to face the main surface 11a.
  • Antenna 26 is connected to main surface 11a at connection 26b. Therefore, an image of the antenna 26 is formed on the main surface 11a.
  • the physical length of the antenna 26 is ( ⁇ 4) XA (A is an integer), but the electrical length is (; LZ 2) XA (A is an integer).
  • a plate-like antenna 26c is provided at a portion where the current value is maximum.
  • the antenna device 3f and the mobile phone 1 # configured as described above have the same effect as the antenna device 3f and the mobile phone 1e described in the fifth embodiment.
  • FIGS. 14 to 16 are diagrams showing steps for measuring a radiation pattern on the YZ plane.
  • mobile phone 1a shown in Embodiment 1 was prepared.
  • the electric length of the antenna 21 was set to 2;
  • the plate-shaped antenna 21b was arranged at an electrical length from the end 21d of the antenna;
  • the mobile phone 1a is placed on the table so that the Y direction (the direction in which the short side of the substrate 11 extends) and the Z direction (the direction in which the long side of the substrate 11 extends) shown in FIG. Placed on 150.
  • the X direction was set to be the vertical direction indicated by the arrow 140.
  • the table 150 can rotate in the direction indicated by the arrow R.
  • radio waves having a frequency of 1.95 GHz are transmitted from the wireless transmission / reception unit on the substrate 11 via the antenna device 3a with a predetermined output. Radiated.
  • the table 150 was rotated in the direction indicated by the arrow R.
  • a radio wave as indicated by an arrow 151 was emitted from the antenna device 3a.
  • the electric field strength of this radio wave was measured with a measuring antenna 160, and the electric field strength of the vertical polarization in the direction indicated by arrow V and the horizontal polarization in the direction indicated by arrow H of this radio wave was determined.
  • dipole antenna 170 was placed on table 150.
  • a feeding point 1711 is provided in the center, The feed point 17 1 is connected to the coaxial cable 17 2.
  • the coaxial cable 172 is connected to a predetermined wireless transmission / reception unit.
  • the dipole antenna 170 extends substantially parallel to the vertical direction indicated by the arrow 140. While rotating the table 150 in the direction indicated by the arrow R, the same output as the output provided by the radio transmitting / receiving unit to the antenna device 3a shown in FIG. From 0, a radio wave with a frequency of 1.95 GHz, as indicated by an arrow 152, was emitted. As a result, a radio wave indicated by an arrow 152 was radiated from the dipole antenna 170. This radio wave is vertically polarized in the direction indicated by arrow V. The electric field strength of this radio wave is measured with a measurement antenna 160 and
  • the same output as that given by the radio transmission / reception unit to antenna device 3 a is given to dipole antenna 170, and the frequency indicated by arrow 153 from dipole antenna 170 is ⁇ . Emitted 9 5 GHz radio waves. This radio wave is horizontally polarized in the direction indicated by arrow H. The electric field strength of this radio wave was obtained by the measurement antenna 160. Based on the data obtained in the steps shown in FIGS. 14 to 16, the radiation pattern of the antenna device according to the present invention was determined. Figure 17 shows the results.
  • the solid line 301 represents the electric field intensity of the radio wave radiated from the antenna device 3a shown in FIG. 14 with respect to the electric field strength of the vertically polarized wave radiated from the dipole antenna 170 in the process shown in FIG.
  • This shows the gain of the vertical polarization component. This gain is obtained according to the following equation:
  • ⁇ Gain> 20 X 1 og in (Vertically polarized electric field strength from antenna device 3a Z Vertically polarized electric field strength from dipole antenna 170)
  • the dotted line 302 is the horizontal polarization component of the radio wave radiated from the antenna device 3a shown in Fig. 14 with respect to the electric field strength of the horizontal polarization radiated from the dipole antenna 170 in the process shown in Fig. 16. Is the gain. This gain was calculated according to the following equation.
  • the gain of the vertically polarized wave is relatively equal in all directions. Also, the gain of horizontal polarization is almost equal in all directions. Therefore, it is possible to transmit and receive various polarized waves. You can see that you can.
  • the Y-axis and the Z-axis are oriented in the horizontal direction, and the X-axis is oriented in the vertical direction according to the same process as the process shown in FIG. And placed on a table 150 in parallel.
  • a radio wave having a frequency of 1.95 GHz was emitted via the antenna device 3X while rotating the table 150 in the direction indicated by the arrow R.
  • the same output as that given by the wireless transmitting / receiving unit to the antenna device 3a was given to the antenna device 3X.
  • the vertical and horizontal polarization components of the radiated radio wave were measured by the measurement antenna 160.
  • Fig. 18 shows the radiation pattern of such a conventional antenna.
  • the solid line 311 is the electric field of the vertical polarization component of the radio wave radiated from the antenna device 3X according to the process shown in Fig. 14 with respect to the electric field strength of the vertical polarization measured in the process shown in Fig. 15 Shows the gain in intensity. This gain was calculated according to the following equation.
  • Dotted lines 3 1 and 2 are plots of the electric field strength of horizontal polarization measured in the process shown in FIG.
  • the Y-axis and the Z-axis are oriented horizontally, and the X-axis is
  • the mobile phone 1y was placed on the table 150 so as to be parallel to the direction. 'In this state, a radio wave having a frequency of 1/95 GHz was radiated through the antenna device 3 y while rotating the table 150 in the direction indicated by the arrow R. At this time, an output similar to the output given by the wireless transmission / reception unit to the antenna device 3a was given to the antenna device 3y .
  • the vertical and horizontal polarization components of the radiated radio wave were measured with a measurement antenna 160.
  • the radiation pattern for such a conventional antenna is shown in FIG. Fig. 19
  • the solid line 3 21 represents the electric field strength of the vertical polarization component of the radio wave radiated from the antenna device 3y in accordance with the process shown in Fig. 14, with respect to the electric field intensity of the vertical polarization measured in the process shown in Fig. 15. Shows the gain. This gain was calculated according to the following equation.
  • the dotted line 3 2 2 shows the gain of the electric field strength of the horizontal polarization component of the radio wave radiated from the antenna device 3 y in accordance with the process shown in FIG. 14 with respect to the electric field intensity of the horizontal polarization measured in the process shown in FIG. 16. It is. This gain was calculated according to the following equation.
  • this plate-like antenna 122 has a problem that the sum of the lengths of the entire circumference of the antenna becomes larger and the size of the mobile phone becomes larger. '
  • the gain was measured when a person held the above-mentioned mobile phones la, 1X, and 1y with either the right hand or the left hand for talking.
  • the gain when a person held a call with the mobile phone l a in the left hand was set to 0 dB, and for each sample, the gain was measured when the person held the left hand or the right hand.
  • Table 1 The results are shown in Table 1.
  • the maximum electric field strength near the antenna was determined for the mobile phones 1a, 1X, and 1y. Assuming that the maximum electric field strength of the mobile phone 1a is 100%, the electric field strength of the mobile phone 1X is 130%, and the maximum electric field strength of the mobile phone 1y is 68%. Met. Therefore, according to the product of the present invention, since the concentration of the electric field is reduced as compared with the mobile phone X, even if a person touches the vicinity of the antenna, the electric field may be affected by the act of the person. Less. As a result, a decrease in gain can be prevented.
  • a monopole antenna can be used as the linear antenna.
  • the electrical length of the antennas 21, 23, and 24 is 2 in order to reduce the size of the mobile phone.
  • Industrial applicability-The antenna device and the mobile phone according to the present invention can be used in the field of mobile phones with built-in antennas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)

Abstract

Dispositif d'antenne (3a) comprenant un substrat (11) et une antenne (21) placée sur le substrat (11) et présentant une longueur électrique de (μ / 2) x A (A étant un entier). L'antenne (21) consiste en une antenne plate (21b) située à distance d'un bord (21d) sur une distance équivalente à une longueur électrique de μ / 4+ (μ / 2) x B (B étant un entier) et en des antennes en spirale (21a, 21c) couplées à l'antenne plate (21b).
PCT/JP2000/007637 2000-10-31 2000-10-31 Dispositif d'antenne et terminal portable WO2002039542A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN00818025.3A CN1229893C (zh) 2000-10-31 2000-10-31 天线装置及便携终端
EP00970214A EP1335448A4 (fr) 2000-10-31 2000-10-31 Dispositif d'antenne et terminal portable
US10/149,431 US6677907B2 (en) 2000-10-31 2000-10-31 Antenna device and portable terminal
JP2002541755A JPWO2002039542A1 (ja) 2000-10-31 2000-10-31 アンテナ装置および携帯端末
PCT/JP2000/007637 WO2002039542A1 (fr) 2000-10-31 2000-10-31 Dispositif d'antenne et terminal portable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/007637 WO2002039542A1 (fr) 2000-10-31 2000-10-31 Dispositif d'antenne et terminal portable

Publications (1)

Publication Number Publication Date
WO2002039542A1 true WO2002039542A1 (fr) 2002-05-16

Family

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PCT/JP2000/007637 WO2002039542A1 (fr) 2000-10-31 2000-10-31 Dispositif d'antenne et terminal portable

Country Status (4)

Country Link
EP (1) EP1335448A4 (fr)
JP (1) JPWO2002039542A1 (fr)
CN (1) CN1229893C (fr)
WO (1) WO2002039542A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1427056A1 (fr) * 2002-12-03 2004-06-09 Ngk Spark Plug Co., Ltd Antenne multibande

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JPS5757618U (fr) * 1980-09-20 1982-04-05
JPH10303637A (ja) * 1997-04-25 1998-11-13 Harada Ind Co Ltd 自動車用ｔｖアンテナ装置
EP0924797A1 (fr) * 1997-12-11 1999-06-23 Alcatel Antenne multifréquence réalisée selon la technique des microrubans, et dispositif incluant cette antenne
JPH11274828A (ja) * 1998-03-18 1999-10-08 Tokin Corp 携帯通信端末とそのアンテナ装置

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Publication number Priority date Publication date Assignee Title
US5898411A (en) * 1996-02-26 1999-04-27 Pacific Antenna Technologies, Inc. Single-element, multi-frequency, dipole antenna
JPH10107535A (ja) * 1996-09-27 1998-04-24 Murata Mfg Co Ltd 表面実装型アンテナ
JP3580654B2 (ja) * 1996-12-04 2004-10-27 京セラ株式会社 共用アンテナおよびこれを用いた携帯無線機
US6288680B1 (en) * 1998-03-18 2001-09-11 Murata Manufacturing Co., Ltd. Antenna apparatus and mobile communication apparatus using the same

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS5757618U (fr) * 1980-09-20 1982-04-05
JPH10303637A (ja) * 1997-04-25 1998-11-13 Harada Ind Co Ltd 自動車用ｔｖアンテナ装置
EP0924797A1 (fr) * 1997-12-11 1999-06-23 Alcatel Antenne multifréquence réalisée selon la technique des microrubans, et dispositif incluant cette antenne
JPH11274828A (ja) * 1998-03-18 1999-10-08 Tokin Corp 携帯通信端末とそのアンテナ装置

Non-Patent Citations (1)

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Title
See also references of EP1335448A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1427056A1 (fr) * 2002-12-03 2004-06-09 Ngk Spark Plug Co., Ltd Antenne multibande
US6842143B2 (en) 2002-12-03 2005-01-11 Ngk Spark Plug Co., Ltd. Multiple band antenna

Also Published As

Publication number Publication date
CN1415126A (zh) 2003-04-30
JPWO2002039542A1 (ja) 2004-03-18
EP1335448A1 (fr) 2003-08-13
CN1229893C (zh) 2005-11-30
EP1335448A4 (fr) 2004-12-15

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