WO2003105277A1 - 複共振アンテナおよび携帯無線機用アンテナ - Google Patents
複共振アンテナおよび携帯無線機用アンテナ Download PDFInfo
- Publication number
- WO2003105277A1 WO2003105277A1 PCT/JP2003/006531 JP0306531W WO03105277A1 WO 2003105277 A1 WO2003105277 A1 WO 2003105277A1 JP 0306531 W JP0306531 W JP 0306531W WO 03105277 A1 WO03105277 A1 WO 03105277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- bobbin
- conductive
- fixed
- wireless device
- Prior art date
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Classifications
-
- 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
-
- 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
-
- 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
- H01Q1/244—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 extendable from a housing along a given path
-
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/378—Combination of fed elements with parasitic elements
Definitions
- the present invention relates to a multi-resonant antenna operating in a plurality of frequency bands and an antenna for a portable wireless device.
- the frequency band used by a mobile telephone system is generally a plurality of frequency bands.
- the 800 MHz band (810 MHz to 956 MHz) and the 1.4 GHz band (1429 MHz to 1501 MHz) are used.
- 900 MHz band (824 MHz to 894 MHz) as the AMPS (Advanced Mobile Phone Service) system and 1.8 GHz band (1850 MHz to: the PCS) 1990 MHz) has been used at least.
- the 900 MHz band (870 MHz to 960 MHz) is used as a GSM (Global System for Mobile communications) system
- the 1.8 GHz band (1710 MHz to 188 MHz) is used as a DCS (Digital Cellular System) system.
- OMH z Digital Cellular System
- the reason for using multiple frequency bands in this way is that the number of subscribers increases and one frequency band lacks available frequencies.
- a GPS receiver of the GPS system whose satellite transmission frequency is about 1575 MHz is being installed.
- a portable wireless device that receives or transmits a plurality of frequency bands needs to be equipped with an antenna that operates in a plurality of frequency bands. Therefore, in the past, as an antenna operating in a plurality of frequency bands, a planar antenna or a small-volume chip antenna was built in the radio housing in addition to the main external antenna. However, this has the problem that the antenna takes up the volume inside the radio case, which is incompatible with miniaturization of the radio. There was a point. Furthermore, there is also a problem that when the user holds the portable wireless device, the built-in antenna is covered with a large portion of the hand, which deteriorates the antenna characteristics when the portable wireless device is used.
- an object of the present invention is to provide a miniaturized double resonance antenna and a portable radio antenna that operate well in a plurality of frequency bands. Disclosure of the invention
- a multiple resonance antenna includes an insulating antenna bobbin having an outer peripheral surface on which a pattern of elements resonating in a plurality of frequency bands is formed, and a center axis of the antenna bobbin.
- the lower part of the antenna bobbin is fitted into a conductive antenna holder, and the antenna holder and the element are electrically connected to each other, and cover the antenna bobbin.
- An insulating cap may be fitted on the upper part of the antenna holder.
- the pattern of the element may be formed by being folded, and a short-circuit portion may be formed to connect the folded part of the pattern.
- an antenna for a portable wireless device which can solve the above-mentioned problem, comprises: a fixed antenna portion that can be fixed to a housing of the portable wireless device; Mobile phone with a telescopic antenna that is telescopic An antenna for a wireless device, wherein the fixed antenna portion includes: an insulating antenna bobbin having a pattern of elements resonating in a plurality of frequency bands formed on an outer peripheral surface thereof; A conductive parasitic conductor inserted into the formed through hole, a conductive antenna holder to which the lower part of the antenna bobbin is fitted to electrically connect the element; and A telescoping antenna part, which is provided at a lower end of the whip part and is formed substantially along a central axis of the fixed antenna part when extended. A conductive stopper that is held in the antenna through-hole and is provided at the tip of the whip portion and has an insulating property that is located in the antenna through-hole when retracted. And an insulating part.
- a conductive enlarged diameter portion is provided in the middle of the whip portion, and when the whip portion is extended, the enlarged diameter portion is inserted into a through hole ⁇ ⁇ ⁇ ⁇ in the antenna bobbin.
- the diameter portion may be located.
- a conductive portion may be provided instead of the parasitic conductor in a portion of the insulating portion which is located in the antenna through hole when the insulating portion is contracted.
- a conductive contact panel is provided in place of the enlarged diameter portion, the conductive contact panel being in contact with the inside of the through hole in the parasitic conductor when the whip portion is extended. It may be.
- a conductive film may be formed on an inner peripheral surface of a through hole in the antenna bobbin instead of the parasitic conductor.
- a conductive parasitic conductor is inserted into a storage hole of an insulating antenna bobbin in which a pattern of elements resonating in a plurality of frequency bands is formed.
- a multi-resonant antenna having good electric characteristics that can be operated in a frequency band can be obtained.
- the size can be reduced.
- such a multiple resonance antenna can be fixed to a housing as a fixed antenna portion, and penetrates through the fixed antenna portion so as to be expandable and contractible with respect to the fixed antenna portion.
- the antenna for the portable wireless device is constituted by the telescopic antenna portion
- the antenna for the portable wireless device can be operated in a plurality of frequency bands and has good electrical characteristics and a reduced size.
- the enlarged diameter portion provided in the middle of the telescopic antenna in the through hole of the antenna bobbin can further improve the electrical characteristics at the time of contraction. it can.
- FIG. 1 is a diagram showing a configuration of a portable wireless device including a multiple resonance antenna according to an embodiment of the present invention.
- FIG. 2 is an exploded view showing a configuration of a fixed antenna unit according to the embodiment of the multiple resonance antenna of the present invention.
- FIG. 3 is a cross-sectional view showing a configuration of a fixed antenna unit according to an embodiment of the multiple resonance antenna of the present invention.
- FIG. 4 is a cross-sectional view showing a configuration of a fixed antenna unit according to an embodiment of the multiple resonance antenna of the present invention.
- FIG. 5 is a diagram showing a first pattern example of the antenna element in the fixed antenna unit according to the embodiment of the multiple resonance antenna of the present invention.
- FIG. 6 is a diagram showing a second pattern example of the antenna element in the fixed antenna unit according to the embodiment of the multiple resonance antenna of the present invention.
- FIG. 7 is a diagram showing a configuration of a portable wireless device including a portable wireless device antenna according to an embodiment of the present invention.
- FIG. 8 is a diagram showing a relationship between the antenna for a portable wireless device according to the embodiment of the present invention and a circuit board built in the portable wireless device.
- FIG. 9 is a diagram showing an overall configuration of an antenna for a portable wireless device according to an embodiment of the present invention.
- FIG. 10 is a diagram showing a configuration of a portable wireless device antenna according to an embodiment of the present invention when a telescopic antenna unit is extended.
- FIG. 11 is a diagram showing a configuration of the antenna for a portable wireless device according to the embodiment of the present invention when the expandable antenna unit is contracted.
- FIG. 12 is a diagram showing a configuration of a portable wireless device antenna according to a second embodiment of the present invention when a telescopic antenna unit is extended.
- FIG. 13 is a diagram showing a configuration when the telescopic antenna unit is contracted in the portable radio antenna according to the second embodiment of the present invention.
- FIG. 14 is a diagram showing a configuration of the portable wireless device antenna according to the third embodiment of the present invention when the telescopic antenna unit is extended.
- FIG. 15 is a diagram showing a configuration of the antenna for a portable wireless device having the third configuration according to the embodiment of the present invention when the telescopic antenna unit is contracted.
- FIG. 16 is a diagram showing the frequency characteristics of V SWR when the telescopic antenna unit is extended in the portable radio antenna without the parasitic element according to the embodiment of the present invention.
- FIG. 17 is a diagram showing the frequency characteristics of V SWR when the telescopic antenna section is reduced in the portable radio antenna without the parasitic element according to the embodiment of the present invention.
- FIG. 18 is a diagram showing the frequency characteristics of the V SWR when the telescopic antenna section is extended in the portable radio antenna having the parasitic element according to the embodiment of the present invention.
- FIG. 19 is a diagram showing a frequency characteristic of VSWR when a telescopic antenna unit is reduced in an antenna for a portable wireless device having a parasitic element according to an embodiment of the present invention.
- FIG. 1 shows a configuration of a portable wireless device including a multiple resonance antenna according to an embodiment of the present invention.
- the portable wireless device 1 shown in FIG. 1 is a mobile phone, for example, and includes a wireless device housing 1a in which a telephone function circuit unit and a battery are stored. Various buttons including a dial button and a display are provided.
- a fixed antenna unit 2 which is a multiple resonance antenna according to the present invention is fixed to the upper surface of the radio housing 1a.
- the fixed antenna unit 2 is, for example, an AMPS 900 M It is considered to be an antenna that can operate in the three frequency bands of the GPS system, which is the Hz band, the 1.8 GHz band of the PCS system, and the satellite transmission frequency is about 157 MHz.
- FIG. 2 shows a cross-sectional view of a section other than the antenna bobbin
- FIG. 4 shows a cross-sectional view of the section including the antenna bobbin.
- a conductive antenna holder 13 made of metal has a screw portion 13b formed on its outer peripheral surface, and a concave fitting portion 13a formed on its upper surface. I have.
- the lower part of the antenna bobbin 12 is fitted into the fitting portion 13a.
- the antenna bobbin 12 is made of an insulating material such as a synthetic resin and has a substantially circular cross section.
- This pattern is formed on the outer peripheral surface of the antenna bobbin 12 as a conductive film by conductive foil printing, conductive powder deposition, plating, or the like, and has a ring-like pattern below the antenna bobbin 12.
- This ring-shaped pattern is a portion that is electrically connected to the antenna holder 13 when the antenna bobbin 12 is inserted into the insertion portion 13a of the antenna holder 13.
- the antenna bobbin 12 fixed to the antenna holder 13 is provided with a storage hole 12a along the central axis so as to substantially correspond to the portion where the antenna element 14 is formed.
- a conductive parasitic conductor 11 made of, for example, metal and formed into a cylindrical shape is inserted into the storage hole 12a.
- an insulating cap portion 10 made of, for example, a synthetic resin is covered from above so that the antenna bobbin 12 is stored in the storage portion 10a of the cap portion 10.
- a fitting portion 10b provided at a lower portion of the cap portion 10 is fitted and fixed to an upper portion of the antenna holder 13 at a time.
- the antenna holder 13 of the fixed antenna unit 2 configured as described above is inserted into a through hole provided on the upper surface of the radio housing 1a, and the holder nut is inserted from inside the radio housing 1a.
- the fixed antenna part 2 is fixed to the radio housing 1 a by screwing it into the screw part 13 b of the antenna holder 13. Be worn. At this time, the terminal comes into contact with the antenna holder 13, and the radio circuit incorporated in the radio case 1 a and the fixed antenna section 2 are electrically connected.
- FIG. 5 shows a developed view of a first pattern example of the pattern of the antenna element 14 formed on the outer peripheral surface of the antenna holder 13.
- the antenna element 14 includes a first element 14a and a second element 14b.
- the first element 14a and the second element 14b are formed by bending a plurality of times in order to shorten the height, and a short-circuit portion 14d that short-circuits a predetermined portion between the folded patterns is formed. Some places.
- the lower ends of the first element 14a and the second element 14b are connected to a power supply section 14c, and the power supply section 14c is fitted into the insertion section 13a of the antenna holder 13 to make contact therewith.
- a ring-shaped pattern is formed.
- FIG. 6 shows a developed view of a second pattern example of the pattern of the antenna element 14 formed on the outer peripheral surface of the antenna holder 13.
- the antenna element 14 includes a first element 14a and a second element 14b.
- the first element 14a and the second element 14b are formed by being bent multiple times in order to reduce the height as in the first pattern example, but the pattern shapes when folded are different. ing.
- several short-circuit portions 14d for short-circuiting a predetermined portion between the folded patterns are provided.
- the lower end of the first element 14a is connected to the power supply unit 14c, and the lower end of the second element 14b is connected to the middle of the first element 14a.
- the power supply portion 14c forms a ring-shaped pattern that is fitted into and brought into contact with the fitting portion 13a of the antenna holder 13.
- the fixed antenna unit 2 in which the antenna element 14 which is the first pattern example or the second pattern example is formed on the outer peripheral surface of the antenna bobbin 12 is used for the 90 OMHZ band of the AMPS system and 1. If operation is possible in the three frequency bands of the GPS system where the 8 GHz band and the satellite transmission frequency are about 1575 MHz, the first element 14 a is mainly in the AMPS frequency band. And the second element 14b operates mainly in PCS and GPS systems. However, since the first element 14a and the second element 14b are arranged close to each other, they do not operate independently but are influenced by each other. It can operate in three frequency bands: the PCS system, the PCS system, and the GPS system.
- the parasitic conductor 11 inserted in the receiving hole 12a of the antenna bobbin 12 is closely arranged in such a pattern of the antenna element 14, and is affected by the parasitic conductor 11.
- the electrical characteristics have been improved in the AMPS, PCS, and GPS system frequency bands, and the fixed antenna unit 2 can operate in three frequency bands. Since the impedance of the fixed antenna unit 2 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with a radio circuit can be omitted.
- FIG. 7 shows the configuration of a portable wireless device including the portable wireless device antenna according to the first embodiment of the present invention
- FIG. 8 shows the relationship between the circuit board built in the portable wireless device and the portable wireless device antenna. Shown in
- the mobile wireless device 1 shown in FIG. 7 is, for example, a mobile phone and includes a wireless device housing 1a in which a telephone function circuit section and a battery are stored. Various buttons including a dial button and a display are provided.
- the antenna 3 for a portable wireless device according to the present invention is fixed to the upper surface of the wireless device housing 1a.
- the portable radio antenna 3 is used in a GPS system, for example, which is in the 90-MHz band of the AMPS system and the 1.8-GHz band of the PCS system, and has a satellite transmission frequency of about 157 MHz.
- the portable radio antenna 3 operable in three frequency bands is composed of a fixed antenna 4 and a telescopic antenna 5, and the fixed antenna 4 is fixed to the radio housing 1a. It is made to be done.
- the telescopic antenna section 5 can extend and contract with respect to the fixed antenna section 4 through the fixed antenna section 4.
- the fixed antenna section 4 is inserted through a through hole provided on the upper surface of the radio housing la to fix the holder nut 1b from the inside of the radio housing 1a as shown in FIG. By screwing it to the lower part of the antenna part 4,
- the fixed antenna unit 4 is fixed to the radio device housing 1a.
- the contact terminal 1c one end of which is soldered to the circuit board 1d, comes into contact with the power supply section of the fixed antenna section 2 and is fixed to the RF circuit 1e provided on the circuit board 1d.
- the antenna unit 4 is electrically connected.
- FIG. 9 shows the entire configuration of the portable wireless device antenna 3 according to the present invention
- FIG. 10 is a cross-sectional view showing a state where the extension antenna unit 5 is extended.
- FIG. 11 is a cross-sectional view showing a state in which is reduced.
- the fixed antenna part 4 has a through hole 4a formed entirely, and includes an antenna bobbin 22 in which the parasitic conductor 21 is fitted, an antenna holder 23, and a cap part. 20.
- the conductive antenna holder 23 made of, for example, a metal has a screw portion 23b formed on the outer peripheral surface thereof, and a concave fitting portion is formed on the upper surface thereof. The lower part of the antenna bobbin 22 is fitted into this fitting portion. Further, a through-hole forming the through-hole 4a is formed substantially along the central axis.
- the antenna bobbin 22 is made of an insulating material such as a synthetic resin and has a substantially circular cross section.
- a pattern of antenna elements resonating in a plurality of frequency bands shown in FIG. 5 or FIG. 6 is formed on the outer peripheral surface of the antenna bobbin 22 as a conductive film by conductive foil printing, conductive powder vapor deposition or plating, and the like, as shown in FIG. 5 or FIG.
- the lower part is a ring-shaped pattern. This ring-shaped pattern is electrically connected to the antenna holder 23 when the antenna bobbin 22 is inserted into the insertion part of the antenna holder 23.
- the antenna bobbin 22 fixed to the antenna holder 23 has a through-hole that forms a through-hole 4a substantially along the central axis.
- a substantially parasitic conductive parasitic conductor 21 made of, for example, metal is fitted so as to substantially correspond to a portion where the antenna element serving as a pattern is formed. Is ing.
- an insulating raw cap portion 20 made of, for example, a synthetic resin is placed over the antenna bobbin 22 so as to cover the entire antenna bobbin 22, and is provided at a lower portion of the cap portion 20.
- the fixed mounting portion is fitted and fixed to the upper portion of the antenna holder 23.
- the fixed antenna portion 4 thus configured is slidable in the through hole 4a.
- the telescopic antenna unit 5 is incorporated in the fixed antenna unit 4.
- the telescopic antenna section 5 includes, for example, a conductive whip section 5a made of superelastic metal, a resin insulation section 6 integrally formed on the upper end of the whip section 5a, and a lower end of the whip section 5a. It is composed of a conductive stopper 8 which is fixed, for example, made of metal. In the middle of the whip portion 5a, there is provided a conductive enlarged diameter portion 5b whose outside diameter is increased, for example, made of metal.
- the state shown in FIGS. 9 and 10 is such that the telescopic antenna section 5 is extended with respect to the fixed antenna section 4, and the flange 8a formed at the lower end of the stopper 8 is the antenna holder. Abuts on the lower end of 23.
- the extendable antenna portion 5 does not extend any more, and is prevented from coming off by the flange portion 8a. Further, the main body of the stopper 8 is inserted into the through hole 4a, and is held by the holding panel 9 inserted into the through hole of the antenna holder 23. As a result, the telescopic antenna unit 5 is held in an extended state.
- the whip section 5a When the telescopic antenna section 5 is extended, the whip section 5a is electrically connected to the antenna holder 23 via the stopper 8, so that the telescopic antenna section 5 and the fixed antenna section 4 are both in the operating state. Becomes In this case, the extendable antenna unit 5 and the fixed antenna unit 4 affect each other. Therefore, as shown in FIG. 10, when the telescopic antenna section 5 is extended, the enlarged diameter section 5b provided in the middle of the whip section 5a is positioned within the parasitic conductor 21. I have to. As a result, the mobile radio antenna 3 as a whole has improved electrical characteristics in three frequency bands, for example, the AMPS system, the PCS system, and the GPS system, and becomes an antenna operable in the three frequency bands. .
- the impedance of the expanded portable wireless device antenna 3 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1 e can be omitted. Further Since the telescopic antenna unit 5 and the fixed antenna unit 4 are both in operation, the entire length of the whip unit 5a can be shortened compared to the wavelength of the AMPS system, and The overall length of the mechanical antenna 3 can also be shortened.
- the state shown in FIG. 11 is a state in which the telescopic antenna section 5 is contracted with respect to the fixed antenna section 4, and the tip of the insulating section 6 integrally formed at the tip of the whip section 5a.
- the lower surface of the top portion 7 formed on the upper surface abuts on the upper surface of the cap portion 20.
- the extendable antenna section 5 is not reduced any more, and the insulating section 6 is located in the through hole 4a of the fixed antenna section 4. Therefore, the fixed antenna unit 4 is not affected by the telescopic antenna unit 5 due to the action of the insulating unit 6, and the telescopic antenna unit 5 does not operate, and only the fixed antenna unit 4 operates.
- the fixed antenna section 4 When the fixed antenna section 4 operates alone, it operates in the same manner as the fixed antenna section 2 described above, so that the pattern of the antenna element formed on the outer peripheral surface of the antenna bobbin 22 is affected by the parasitic conductor 21. As a result, good electrical characteristics are obtained in the frequency bands of, for example, the AMPS system, the PCS system, and the GPS system, and operation is possible in three frequency bands. Since the impedance of the fixed antenna unit 4 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1 e can be omitted.
- the operation of the parasitic conductor 21 will be shown by comparing the case where the parasitic conductor 21 is not provided with the case where the parasitic conductor 21 is provided.
- Fig. 16 shows the frequency characteristics of the voltage standing wave ratio (VS WR) when the telescopic antenna 5 is extended in the mobile radio antenna 3 without the parasitic antenna 21.
- Figure 17 shows the frequency characteristics of VS WR when part 5 is reduced.
- Fig. 18 shows the frequency characteristics of the VS WR when the telescopic antenna unit 5 is extended in the portable radio antenna 3 provided with the parasitic conductor 21 and the telescopic antenna unit 5 is contracted.
- Figure 19 shows the frequency characteristics of VS WR in this case.
- the frequency band of 824 MHz to 894 MHz is the AMPS system
- the frequency band of 1850 MHz to 199 MHz is the PCS system.
- 1755 MHz is the frequency band of the GPS system.
- Telescopic antenna 3 with no parasitic conductor 2 1
- the VSWR is about 3 or less in the AMPS and PCS system frequency bands as shown in Fig. 16, but it is about 3.5 in the GPS system frequency band. And deteriorated.
- the telescopic antenna unit 5 is reduced, the VSWR is about 3 or less in the GPS system and PCS system frequency bands as shown in Fig. 17, but in the AMPS system frequency band. Degraded to about 4 or less.
- the telescopic antenna section 5 when the telescopic antenna section 5 is extended in the portable wireless device antenna 3 provided with the parasitic conductor 21, as shown in FIG. 18, V in the frequency band of the AMP S system and the PCS system.
- the SWR has been improved to about 2.1 or less, and also improved to about 2.0 in the frequency band of the GPS system.
- the V SWR when the expansion antenna section 5 is contracted, the V SWR is improved to about 2.0 or less in the frequency band of the AMPS system and the PCS system as shown in FIG. It is also improved to about 2.0 in the S system frequency band.
- the provision of the parasitic conductor 21 improves the electrical characteristics in the three frequency bands of the AMPS system, the PCS system, and the GPS system, and enables the portable wireless device to operate in the three frequency bands. It can be seen that the antenna 3 is used. The operation of the parasitic conductor 11 in the fixed antenna section 2 shown in FIGS. 3 and 4 is also the same. By providing the parasitic conductor 11, the VSWR characteristic shown in FIG. To improve the electrical characteristics.
- FIG. 12 is a cross-sectional view showing a state where the telescopic antenna section is extended
- FIG. 12 is a cross-sectional view showing a state where the telescopic antenna section is contracted. The figure is shown in Fig. 13.
- the configuration of the fixed antenna unit 4 is the same as that of the portable wireless device antenna 3 shown in FIGS. 11 and 12.
- the configuration is the same as that of the fixed antenna unit 4, and the configuration of the telescopic antenna unit 25 is changed.
- the configuration of the telescopic antenna unit 25 will be described below.
- the telescopic antenna section 25 includes a conductive whip section 25a made of, for example, a superelastic metal, a resin insulation section 6 integrally formed on the upper end of the whip section 25a, And a conductive stopper 18 fixed to the lower end of the stopper portion 25a, for example, made of metal.
- a conductive panel portion 25c having a large outer diameter, for example, made of metal is provided in the middle of the whip portion 25a. In the state shown in FIG.
- the telescopic antenna section 25 is extended with respect to the fixed antenna section 4, and the flange 8 a formed at the lower end of the stopper 8 is provided with the antenna holder 1 2 3 At the lower end of the As a result, the telescopic antenna section 25 does not extend any more, and is prevented from falling off by the flange section 8a.
- the main body of the stopper 8 is fitted in the through hole 4 a and is held by the holding panel 9 fitted in the through hole of the antenna holder 23. Further, a spring portion 25c provided in the middle of the whip portion 25a is pressed against the inner peripheral surface of the parasitic conductor 21. Thereby, the extendable antenna section 25 is held in an extended state.
- the telescopic antenna section 25 a When the telescopic antenna section 25 is extended, the telescopic antenna section 25 a is electrically connected to the antenna holder 23 via the stopper 8 so that the telescopic antenna section 25 and the fixed antenna section 4 are connected. Are both in operation. In this case, the extendable antenna section 25 and the fixed antenna section 4 affect each other. Therefore, as shown in FIG. 12, when the telescopic antenna section 25 is extended, the spring section 25 c provided in the middle of the whip section 25 a is connected to the inside of the parasitic conductor 21. It comes into contact with the peripheral surface.
- the portable radio antenna 3 as a whole has improved electrical characteristics in three frequency bands of, for example, the AMPS system, the PCS system, and the GPS system, and can be operated in the three frequency bands. . Since the expanded impedance of the portable wireless device antenna 3 becomes approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1 e can be omitted. Furthermore, since both the extendable antenna section 25 and the fixed antenna section 4 are in operation, the entire length of the whip section 25a can be shortened compared to the wavelength of the AMPS method, and The overall length of the mechanical antenna 3 can be shortened.
- the state shown in FIG. 13 is a state in which the telescopic antenna section 25 is contracted with respect to the fixed antenna section 4, and the insulating section 6 integrally formed at the tip of the whip section 25 a.
- the telescopic antenna part 25 is not reduced any more, and the insulating part 6 is located in the through hole 4 a of the fixed antenna part 4. Therefore, the fixed antenna section 4 is not affected by the telescopic antenna section 25 due to the action of the insulating section 6, and the telescopic antenna section 25 does not operate, and only the fixed antenna section 4 operates.
- the fixed antenna section 4 When the fixed antenna section 4 operates alone, it operates in the same manner as the fixed antenna section 2 described above, and the pattern of the antenna element formed on the outer peripheral surface of the antenna bobbin 22 is affected by the parasitic conductor 21. As a result, it has good electrical characteristics in the frequency bands of the AMPS system, the PCS system, and the GPS system, for example, and can operate in three frequency bands. Since the impedance of the fixed antenna unit 4 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1e can be omitted.
- the VS WR frequency characteristic of the portable radio antenna 3 having the second configuration is as shown in FIG. You.
- the telescopic antenna section 25 is contracted as shown in FIG. 13
- the VS WR frequency characteristic of the portable radio antenna 3 of the second configuration is as shown in FIG. .
- the effect of the parasitic conductor 21 in the three frequency bands of the AMPS system, the PCS system, and the GPS system improves the electrical characteristics due to the action of the parasitic conductor 21, so that the portable radio can operate in the three frequency bands. It becomes antenna 3.
- FIG. 14 is a cross-sectional view showing a state where the telescopic antenna section is extended
- FIG. 14 is a cross-sectional view showing a state where the telescopic antenna section is contracted.
- the figure is shown in Figure 15.
- the non-power-supplying conductor fitted in the antenna bobbin 22 of the fixed antenna portion 34 is omitted.
- the other configuration is the same as the configuration of the fixed antenna unit 4 in the antenna 3 for the portable wireless device shown in FIG. 11 and FIG.
- the parasitic conductor 36a is formed in the insulating part 36 of the telescopic antenna part 35. Therefore, the configuration of the telescopic antenna section 35 will be mainly described below.
- the telescopic antenna part 35 includes, for example, a conductive whip part 5 a made of superelastic metal, a resin insulation part 36 integrally formed at the upper end of the whip part 5 a, And a conductive stopper 8 made of, for example, metal and fixed to the lower end of the stopper portion 5a.
- a conductive enlarged diameter portion 5b having a larger outer diameter, for example, made of metal.
- the extendable antenna portion 35 does not extend any more, and is prevented from coming off by the flange portion 8a. Further, the main body of the stopper 8 is inserted into the through hole 4 a and is held by the holding panel 9 inserted into the through hole of the antenna holder 23. As a result, the extendable antenna section 35 is held in an extended state.
- the telescopic antenna section 35 a When the telescopic antenna section 35 is extended, the telescopic antenna section 35 a is electrically connected to the antenna holder 23 via the stopper 8, so that the telescopic antenna section 35 and the fixed antenna section 3 are connected. 4 are both in operation. In this case, the extendable antenna section 35 and the fixed antenna section 34 affect each other. Therefore, as shown in FIG. 14, when the telescopic antenna section 35 is extended, the enlarged diameter section 5b provided in the middle of the whip section 5a is positioned in the antenna bobbin 12. I have to.
- the enlarged diameter portion 5b also has the function of the parasitic conductor described above, and as a result, as a whole, the antenna 3 for the portable wireless device, for example, in three frequency bands of the AMPS system, the PCS system, and the GPS system
- the antenna is improved with good electrical characteristics and can operate in three frequency bands. Since the impedance of the expanded portable radio antenna 3 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1 e can be omitted. Further, since the extendable antenna section 35 and the fixed antenna section 34 are both in operation, the entire length of the whip section 5a can be made shorter than the wavelength of the AMPS method. The total length of the radio antenna 3 can also be shortened.
- the state shown in FIG. 15 is a state in which the telescopic antenna section 35 is contracted with respect to the fixed antenna section 34, and the insulating section 3 integrally formed at the tip of the whip section 5a.
- the lower surface of the top portion 7 formed at the tip of 6 comes into contact with the upper surface of the cap portion 20. Due to this, the telescopic antenna section 3 5 is not reduced further
- the parasitic conductor 36a formed in the middle of the insulating part 36 comes to be located in the through hole 4a of the fixed antenna part 4. Therefore, the telescopic antenna section 35 does not operate, and only the fixed antenna section 34 operates.
- the parasitic conductor 36a is located in the through hole 4a of the fixed antenna section 34, the antenna element pattern formed on the outer peripheral surface of the antenna bobbin 22 and the parasitic element 36 Under the influence of a, the electrical characteristics are improved in the frequency bands of, for example, the AMPS system, the PCS system, and the GPS system, and operation is possible in three frequency bands. Since the impedance of the fixed antenna section 34 is approximately 50 ⁇ in an operable frequency band, a matching circuit for matching with the RF circuit 1 e can be omitted.
- the parasitic conductor 36a can be formed of a pipe-shaped metal cylinder.However, a conductive film is formed on a predetermined position on the outer peripheral surface of the insulating portion 36 by conductive foil printing, conductive powder deposition, plating, or the like. It may be formed.
- the VS WR frequency characteristic of the portable wireless device antenna 3 having the third configuration is as shown in FIG. You.
- the telescopic antenna section 35 is contracted as shown in FIG. 15, the VS WR frequency characteristics of the portable radio antenna 3 of the third configuration are as shown in FIG. .
- the electrical properties are improved by the action of the enlarged diameter portion 5b or the parasitic conductor 36a. It becomes an operable portable radio antenna 3.
- a guide is provided on the inner peripheral surface of the storage hole 12 a.
- the conductive film may be formed by foil printing, conductive powder deposition, plating, or the like.
- the parasitic conductor 21 is inserted into the through-hole formed in the antenna bobbin 22, and the parasitic conductor 36a is provided in the insulating section 36.
- a conductive film may be formed on the inner peripheral surface of the through hole of the antenna bobbin 22 by printing a conductive foil, depositing a conductive powder, or performing a plating process.
- the conductive parasitic conductor is inserted into the storage hole of the insulating antenna bobbin in which the pattern of the element resonating in a plurality of frequency bands is inserted.
- a multi-resonant antenna with good electrical characteristics that can be operated can be obtained.
- such a multi-resonant antenna can be fixed to the housing as a fixed antenna portion, and can be extended and contracted with respect to the fixed antenna portion by penetrating the fixed antenna portion.
- the antenna for a portable wireless device is configured with the antenna portion, a miniaturized antenna for a portable wireless device having good electric characteristics which can be operated in a plurality of frequency bands can be obtained.
- the enlarged diameter portion provided in the middle of the telescopic antenna in the through hole of the antenna bobbin can further improve the electrical characteristics at the time of contraction. it can.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/486,292 US7023388B2 (en) | 2002-06-10 | 2003-05-26 | Multiple resonance antenna and mobile phone antenna |
BR0304962-0A BR0304962A (pt) | 2002-06-10 | 2003-05-26 | Antenas de ressonância múltipla e de telefone móvel |
KR10-2004-7001976A KR20050007285A (ko) | 2002-06-10 | 2003-05-26 | 복공진 안테나 및 휴대 무선기용 안테나 |
EP03757194A EP1521330A1 (en) | 2002-06-10 | 2003-05-26 | Double resonance antenna and antenna for portable radio |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002168540A JP2004015623A (ja) | 2002-06-10 | 2002-06-10 | 複共振アンテナおよび携帯無線機用アンテナ |
JP2002/168540 | 2002-06-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003105277A1 true WO2003105277A1 (ja) | 2003-12-18 |
Family
ID=29727688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006531 WO2003105277A1 (ja) | 2002-06-10 | 2003-05-26 | 複共振アンテナおよび携帯無線機用アンテナ |
Country Status (8)
Country | Link |
---|---|
US (1) | US7023388B2 (ja) |
EP (1) | EP1521330A1 (ja) |
JP (1) | JP2004015623A (ja) |
KR (1) | KR20050007285A (ja) |
CN (1) | CN1545748A (ja) |
BR (1) | BR0304962A (ja) |
TW (1) | TW200308121A (ja) |
WO (1) | WO2003105277A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7277058B2 (en) * | 2004-12-30 | 2007-10-02 | Motorola, Inc. | Wireless communication device antenna for improved communication with a satellite |
KR101099969B1 (ko) * | 2005-03-31 | 2011-12-28 | 삼성전자주식회사 | 이동통신 단말기에서의 디지털 멀티미디어 방송 겸용안테나 장치 |
US7764236B2 (en) * | 2007-01-04 | 2010-07-27 | Apple Inc. | Broadband antenna for handheld devices |
TWI387222B (zh) * | 2008-04-09 | 2013-02-21 | Inventec Appliances Corp | 可切換訊號接收模式之手持設備 |
US8368602B2 (en) | 2010-06-03 | 2013-02-05 | Apple Inc. | Parallel-fed equal current density dipole antenna |
CN102280711B (zh) * | 2011-05-05 | 2015-05-06 | 天津市万博线缆有限公司 | 野外无线信号天线 |
JP6334313B2 (ja) * | 2014-08-19 | 2018-05-30 | 株式会社ヨコオ | 複合アンテナ及びその製造方法 |
US9903736B2 (en) | 2014-09-18 | 2018-02-27 | Arad Measuring Technologies Ltd. | Utility meter having a meter register utilizing a multiple resonance antenna |
US20160191994A1 (en) * | 2014-12-31 | 2016-06-30 | Thomson Licensing | Digital Terrestrial Television On A Mobile Device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0637531A (ja) * | 1992-07-17 | 1994-02-10 | Sansei Denki Kk | 広帯域ヘリカルアンテナ、および同製造方法 |
WO1997002622A1 (en) * | 1995-06-30 | 1997-01-23 | Smk Corporation | Antenna assembly |
WO1997049141A1 (en) * | 1996-06-15 | 1997-12-24 | Allgon Ab | Meander antenna device |
JPH10209736A (ja) * | 1997-01-27 | 1998-08-07 | Nippon Antenna Co Ltd | 2周波アンテナ |
WO1999048169A1 (fr) * | 1998-03-19 | 1999-09-23 | Matsushita Electric Industrial Co., Ltd. | Dispositif d'antenne et unite de communication mobile |
JPH11330825A (ja) * | 1998-05-12 | 1999-11-30 | Nippon Antenna Co Ltd | 携帯機器用アンテナ |
EP0964474A2 (en) * | 1998-06-12 | 1999-12-15 | Smk Co., Ltd. | Antenna device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US6329962B2 (en) | 1998-08-04 | 2001-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple band, multiple branch antenna for mobile phone |
JP3983384B2 (ja) | 1998-07-23 | 2007-09-26 | 株式会社ヨコオ | 引き出し収納自在なアンテナおよび無線機 |
US6204826B1 (en) | 1999-07-22 | 2001-03-20 | Ericsson Inc. | Flat dual frequency band antennas for wireless communicators |
US6559811B1 (en) | 2002-01-22 | 2003-05-06 | Motorola, Inc. | Antenna with branching arrangement for multiple frequency bands |
JP2003324305A (ja) | 2002-04-30 | 2003-11-14 | Sansei Denki Kk | 3バンドアンテナの構成方法、および、3バンドアンテナ |
US6642893B1 (en) * | 2002-05-09 | 2003-11-04 | Centurion Wireless Technologies, Inc. | Multi-band antenna system including a retractable antenna and a meander antenna |
-
2002
- 2002-06-10 JP JP2002168540A patent/JP2004015623A/ja active Pending
- 2002-12-03 TW TW091135069A patent/TW200308121A/zh unknown
-
2003
- 2003-05-26 US US10/486,292 patent/US7023388B2/en not_active Expired - Fee Related
- 2003-05-26 KR KR10-2004-7001976A patent/KR20050007285A/ko not_active Application Discontinuation
- 2003-05-26 EP EP03757194A patent/EP1521330A1/en not_active Withdrawn
- 2003-05-26 CN CNA038008246A patent/CN1545748A/zh active Pending
- 2003-05-26 BR BR0304962-0A patent/BR0304962A/pt not_active Application Discontinuation
- 2003-05-26 WO PCT/JP2003/006531 patent/WO2003105277A1/ja not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0637531A (ja) * | 1992-07-17 | 1994-02-10 | Sansei Denki Kk | 広帯域ヘリカルアンテナ、および同製造方法 |
WO1997002622A1 (en) * | 1995-06-30 | 1997-01-23 | Smk Corporation | Antenna assembly |
WO1997049141A1 (en) * | 1996-06-15 | 1997-12-24 | Allgon Ab | Meander antenna device |
JPH10209736A (ja) * | 1997-01-27 | 1998-08-07 | Nippon Antenna Co Ltd | 2周波アンテナ |
WO1999048169A1 (fr) * | 1998-03-19 | 1999-09-23 | Matsushita Electric Industrial Co., Ltd. | Dispositif d'antenne et unite de communication mobile |
JPH11330825A (ja) * | 1998-05-12 | 1999-11-30 | Nippon Antenna Co Ltd | 携帯機器用アンテナ |
EP0964474A2 (en) * | 1998-06-12 | 1999-12-15 | Smk Co., Ltd. | Antenna device |
Also Published As
Publication number | Publication date |
---|---|
EP1521330A1 (en) | 2005-04-06 |
KR20050007285A (ko) | 2005-01-17 |
US20040246186A1 (en) | 2004-12-09 |
BR0304962A (pt) | 2004-09-28 |
TW200308121A (en) | 2003-12-16 |
US7023388B2 (en) | 2006-04-04 |
JP2004015623A (ja) | 2004-01-15 |
CN1545748A (zh) | 2004-11-10 |
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