EP1710862A1 - Multiband-Monopolantenne für zwei Verwendungen - Google Patents

Multiband-Monopolantenne für zwei Verwendungen Download PDF

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Publication number
EP1710862A1
EP1710862A1 EP05012743A EP05012743A EP1710862A1 EP 1710862 A1 EP1710862 A1 EP 1710862A1 EP 05012743 A EP05012743 A EP 05012743A EP 05012743 A EP05012743 A EP 05012743A EP 1710862 A1 EP1710862 A1 EP 1710862A1
Authority
EP
European Patent Office
Prior art keywords
line segment
line
path
frequency
frequency path
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP05012743A
Other languages
English (en)
French (fr)
Inventor
Chia-I Lin
Yun-Ta Chen
Jui-Hung Hsu
Yen-Liang Kuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HTC Corp
Original Assignee
High Tech Computer Corp
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 High Tech Computer Corp filed Critical High Tech Computer Corp
Publication of EP1710862A1 publication Critical patent/EP1710862A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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
    • 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
    • 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
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to an antenna apparatus. More particularly, the present invention relates to a dual purpose antenna apparatus built in a wireless communication device for supporting the purposes of the multi-band mobile phone system and the global positioning system (GPS).
  • GPS global positioning system
  • the key development in communication technology has been the transfer from wired to wireless communication, such as by the popularization of wireless household phones and mobile phones.
  • the signal is propagated in the air in the form of electromagnetic waves, where the bridge of the signals between the wireless device and the air is an antenna. That is to say, an antenna is certainly needed by a wireless communication device to transmit or receive electromagnetic waves, and is therefore an essential component of a wireless communication device.
  • the antenna apparatus is usually attached to the exterior of the device, such as a helix antenna attached on the exterior of a mobile phone.
  • a variety of problems are inherent to this arrangement, however.
  • such an antenna is easily damaged by external force, the overhead of the circuit design is increased and the device is harder to carry.
  • many functions are integrated into a device, such as a mobile phone being able to receive and transmit signals in various frequency bands and/or having GPS functionality.
  • the amount of components and antennas will substantially increase in the device, but the limited volume of the device must be maintained.
  • the external antenna is increasingly unsuited for using in advanced wireless communication devices.
  • the conventional embedded compact antenna techniques comprise the flexible printed circuit (FPC), but they have some problems. Due to the FPC antenna being a kind of flat antenna, the length of the resonant path is limited within a footprint and is unable to flexibly extend, thus restricting the operating bandwidth of the FPC antenna.
  • FPC flexible printed circuit
  • a clamshell type mobile phone comprises a lower cover having a keypad and an upper cover having a display. Because the antenna of the clamshell type mobile phone is often located on the top of the lower cover and near the upper cover, the center frequency of the antenna may shift due to the influence of the circuit located in the upper cover. If the center frequency of the antenna shifts out of the operating bandwidth of the system, the antenna is unable to receive and process the signals from base stations.
  • the distance between the circuits located in the upper cover and the antenna is not constant, due to the folding motion of the clamshell type mobile phone. That is to say, the frequency shift value caused by the circuit located in the upper cover is also not constant. For this reason, the frequency shift is hard to be compensated for the shortness of the bandwidth in advance in an FPC antenna. The frequency shift will be more significant at low frequency than at high frequency and thus increases the degree of difficulty in designing the FPC antenna.
  • an embedded compact antenna apparatus which is able to tolerate the frequency shift phenomenon is needed to ensure a good receiver sensitivity of the mobile phone apparatus, especially applying in the clamshell type mobile phone.
  • the invention provides a substrate made by an insulating material, such as plastic, and the substrate has at least two surfaces.
  • One of the two surfaces is a cambered surface and the other one is a flat surface.
  • the two feeding points may be respectively located on the cambered surface or the flat surface.
  • there are two antenna resonant paths extending from the first feeding point one being a high-frequency path of a first radiating metal line and the other being a low-frequency path of the first radiating metal line.
  • the total length of the high-frequency path is shorter than the total length of the low-frequency path. Furthermore, there is a second radiating metal line extending from the second feeding point formed on the cambered and the flat surfaces, and there is a shorting path extending from the second radiating metal line formed on the flat surface, wherein an end of the shorting path is used to connect with the ground potential of the system.
  • the basic objective of the present invention is to provide an embedded compact antenna apparatus with the dual purposes of being a multi-band mobile phone and having a GPS. Especially in a clamshell mobile phone, the antenna is able to provide a wider operating bandwidth. Therefore, the basic concept of the present invention is to form two antenna radiators made of metal materials on an insulating substrate, such that the signals respectively processed by the two radiators will not interfere with each other.
  • One of the two radiators is used to be an antenna resonant path of the multi-band mobile phone system, and the other one is used to be an antenna resonant path of the GPS.
  • the resonant path of the multi-band mobile phone system is further divided into a high-frequency path for the high-frequency signals and a low-frequency path for the low-frequency signals.
  • the low-frequency path is formed on a cambered surface of the substrate to achieve a larger surface area, thus enabling optimization of the antenna radiator structure.
  • Figs. 1A - 1C all show an antenna apparatus 100 according to an embodiment of the present invention, wherein Figs. 1A and 1B are the views of the antenna apparatus 100 from the left side and the right side separately, and Fig. 1C is a front view of the antenna apparatus 100.
  • a substrate 102 of the antenna apparatus 100 can be made of any insulating material, such as plastic, and at least has one flat surface 104 and one cambered surface 106.
  • a first feeding point 108 is located on the flat surface 104 and is used to connect with a mobile phone radio frequency (RF) module (not shown in the figure) so the RF signals can be received and transmitted by the antenna apparatus 100, but the location of the first feeding point 108 is not limited by the embodiment in practice.
  • RF radio frequency
  • the first feeding point 108 is connected by two antenna resonant paths (or one first radiating metal line) made of metal materials for the four frequency bands.
  • One of the two resonant paths is a high-frequency path 200 used by 1800MHz and 1900MHz bands, and the other is a low-frequency path 300 used by 800MHz and 900MHz bands.
  • the high-frequency path 200 can be formed on the flat surface 104, and the low-frequency path 300 is formed on the cambered surface 106 because the low-frequency path 300 with a longer length needs a larger surface area to be formed to achieve a wider operating bandwidth.
  • the high-frequency path 200 is designed to process signals with a frequency range of 1710 MHz to 1990 MHz
  • the low-frequency path 300 is designed to process signals with a frequency range of 824 MHz to 960 MHz. In these frequency ranges, almost all of the frequency bands used by the conventional mobile communication systems can be covered.
  • a second feeding point 110 located on the flat surface 104 acting as an entrance for the GPS signals to the antenna apparatus 100.
  • the second feeding point 110 is used to connect with a GPS RF module (not shown in the figure) for GPS signals to be received by the antenna apparatus 100 and is located on the flat surface 104, but the location of the second feeding point is not limited by the embodiment in practice.
  • the main purpose of the second feeding point 110 is to connect with a second radiating metal line 400.
  • the operating frequency of the present GPS is about 1575 MHz; therefore, the length of the second radiating metal line 400 will be a little longer than the length of the high-frequency path 200 shown in Fig. 1A.
  • the second radiating metal line 400 can be formed on the cambered surface 106 for avoiding an over-routing density on the flat surface 104.
  • a shorting path 500 may be formed to connect to the second radiating metal line 400, and it includes a shorting point 506 to avoid degrading the stability of the GPS signals by the high-frequency path 200 or low-frequency path 300 when they are operated at the same time.
  • the stability of the GPS signals can be enhanced in the operation when the shorting point 506 is connected with the ground potential of the system.
  • the shorting point 506 is located on the flat surface 104 in the embodiment, but the location of the shorting point 506 is not limited by the embodiment in practice.
  • each resonant path of the antenna apparatus 100 that is, the high-frequency path 200, low-frequency path 300, the second radiating metal line 400 and the shorting path 500 are not limited in the embodiment. But according to the results of the related experiments, the forms of each resonant path in the following description are able to provide a better performance (i.e. a better gain and bandwidth).
  • the high-frequency path 200 is formed by connecting four line segments in order that extend from the first feeding point 108: a line segment 202, a line segment 204, a line segment 206 and a line segment 208.
  • the angle between the line segment 202 and the line segment 204 is about 90° to 120°
  • the adjacent angles among the line segments 204, 206, and 208 are both about 45° to 60° .
  • the low-frequency path 300 is formed by connecting eleven line segments in order that extend from the first feeding point 108: a line segment 302, a line segment 304, a line segment 306, a line segment 308, a line segment 310, a line segment 312, a line segment 314, a line segment 316, a line segment 318, a line segment 320 and a line segment 322.
  • angles between the line segment 302 and the line segment 304, between the line segment 304 and the line segment 306, between the line segment 306 and the line segment 308, between the line segment 308 and the line segment 310, between the line segment 310 and the line segment 312, between the line segment 312 and the line segment 314, between the line segment 314 and the line segment 316, between the line segment 316 and the line segment 318, between the line segment 318 and the line segment 320 and between the line segment 320 and the line segment 322 are all about 30° to 120
  • the second radiating metal line 400 is formed by connecting four line segments in order that extend from the second feeding point 110: a line segment 402, a line segment 404, a line segment 406 and a line segment 408.
  • the angle between the line segment 402 and the line segment 404 is about 60°
  • the adjacent angles among the line segment 404, 406, and 408 are both about 90° .
  • a shorting path 500 extending from the joint of the line segment 402 and the line segment 404 to a shorting point 506.
  • the material of the antenna apparatus 100 according to the embodiment is also discussed herein.
  • the material of the substrate 102 is polycarbonate (PC), due to PC being easily shaped and thus beneficial to mass production.
  • PC polycarbonate
  • metal materials can't be easily attached to PC; therefore, all the paths on the substrate 102 surface, the high-frequency path 200, low-frequency path 300, the second radiating metal line 400 and the shorting path 500 should be formed by acrylonitrile butadiene styrene (ABS), due to metal materials being easily attached to ABS.
  • ABS acrylonitrile butadiene styrene
  • all the paths on the substrate 102 are coated with any metal material for completing the antenna apparatus according to the embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
EP05012743A 2005-04-04 2005-06-14 Multiband-Monopolantenne für zwei Verwendungen Ceased EP1710862A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2005100629917A CN1848524B (zh) 2005-04-04 2005-04-04 天线装置、其制作方法以及行动电话及全球定位双用系统

Publications (1)

Publication Number Publication Date
EP1710862A1 true EP1710862A1 (de) 2006-10-11

Family

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Family Applications (1)

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EP05012743A Ceased EP1710862A1 (de) 2005-04-04 2005-06-14 Multiband-Monopolantenne für zwei Verwendungen

Country Status (2)

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EP (1) EP1710862A1 (de)
CN (1) CN1848524B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109638416B (zh) * 2018-12-19 2021-08-03 惠州Tcl移动通信有限公司 天线结构和电子设备

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020089454A1 (en) * 2000-10-13 2002-07-11 Steve Eggleston Antenna transducer assembly, and an associated method therefor
US6505054B1 (en) * 1999-07-07 2003-01-07 Ericsson Inc. Integrated antenna assemblies including multiple antennas for wireless communications devices
EP1313165A2 (de) * 2001-11-15 2003-05-21 Filtronic LK Oy Verfahren zur Herstellung einer internen Antenne und zugehöriges Antennenelement
WO2003067703A1 (en) * 2001-12-20 2003-08-14 Perlos Ab Antenna device
US20040036656A1 (en) * 2000-10-25 2004-02-26 Peter Nevermann Communications terminal
US20040051672A1 (en) * 2000-10-05 2004-03-18 Peter Nevermann Mobile telephone comprising a multi-band antenna
EP1478047A1 (de) * 2003-05-14 2004-11-17 Research In Motion Limited Mehrbandantenne mit Streifenleiter- und Schlitzstrukturen
US20050001772A1 (en) * 2001-08-01 2005-01-06 Takahiro Sugiyama Heat shrinking polyester film roll

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6505054B1 (en) * 1999-07-07 2003-01-07 Ericsson Inc. Integrated antenna assemblies including multiple antennas for wireless communications devices
US20040051672A1 (en) * 2000-10-05 2004-03-18 Peter Nevermann Mobile telephone comprising a multi-band antenna
US20020089454A1 (en) * 2000-10-13 2002-07-11 Steve Eggleston Antenna transducer assembly, and an associated method therefor
US20040036656A1 (en) * 2000-10-25 2004-02-26 Peter Nevermann Communications terminal
US20050001772A1 (en) * 2001-08-01 2005-01-06 Takahiro Sugiyama Heat shrinking polyester film roll
EP1313165A2 (de) * 2001-11-15 2003-05-21 Filtronic LK Oy Verfahren zur Herstellung einer internen Antenne und zugehöriges Antennenelement
WO2003067703A1 (en) * 2001-12-20 2003-08-14 Perlos Ab Antenna device
EP1478047A1 (de) * 2003-05-14 2004-11-17 Research In Motion Limited Mehrbandantenne mit Streifenleiter- und Schlitzstrukturen

Also Published As

Publication number Publication date
CN1848524B (zh) 2012-05-30
CN1848524A (zh) 2006-10-18

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