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EP1770825A1 - An antenna combining external high-band portion and internal low-band portion - Google Patents

An antenna combining external high-band portion and internal low-band portion Download PDF

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Publication number
EP1770825A1
EP1770825A1 EP06119407A EP06119407A EP1770825A1 EP 1770825 A1 EP1770825 A1 EP 1770825A1 EP 06119407 A EP06119407 A EP 06119407A EP 06119407 A EP06119407 A EP 06119407A EP 1770825 A1 EP1770825 A1 EP 1770825A1
Authority
EP
European Patent Office
Prior art keywords
band portion
antenna
low
wireless communication
case
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
EP06119407A
Other languages
German (de)
French (fr)
Inventor
Kuo-Cheng Chen
Chung-I Chou
Kuei-Chiang Huang
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 EP1770825A1 publication Critical patent/EP1770825A1/en
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • H01Q1/38—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
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the invention relates to an antenna and, in particular, to an antenna that can reduce energy dissipation from nearby components and phantom head effect.
  • the transmitting medium of choice has changed from conventional metal wires (such as coaxial cables) to air.
  • Antennas are the key component of wireless communication devices for sending and receiving electromagnetic (EM) signals. That is, a wireless communication device needs to have an antenna in order to send or receive EM waves. Therefore, the antenna is an indispensable component in wireless communication devices.
  • both external and internal antennas have their drawbacks in transmitting and receiving signals.
  • external antennas experience the phantom head effect at low frequencies and thus have large efficiency loss.
  • Internal antennas have serious energy dissipation when in close proximity to components such as microphones or cameras.
  • An objective of the invention is to provide an antenna not only for reducing energy dissipation caused by internal components at high frequencies but also for reducing efficiency loss caused by the phantom head effect at low frequencies.
  • a high-band portion and a low-band portion of an antenna are separately formed and disposed on an antenna case.
  • the high-band portion is exposed outside the antenna case to avoid the energy dissipation at high frequencies due to nearby components.
  • the low-band portion is hidden inside the antenna case to reduce the efficiency loss at low frequencies due to the phantom head effect. Therefore, the invention can solve the conventional problems described above.
  • a high-band portion and a low-band portion are separately formed and disposed on an antenna case.
  • the high-band portion is bent so that it is completely hidden inside the antenna case, and a clearance area is formed in the antenna case to keep the high-band portion from the grounded surface of the substrate by an appropriate distance. Therefore, the antenna is prevented from being damaged as a result of being exposed to the environment.
  • FIG. 1A shows an antenna 100 according to a preferred embodiment of the invention.
  • the antenna 100 includes a high-band portion 101, a low-band portion 102, and an antenna case 103.
  • the high-band portion 101 is a meander-line antenna exposed outside the antenna case 103.
  • the low-band portion 102 is a planar inverted-F antenna (PIFA) hidden inside the antenna case 103.
  • the high-band portion 101 is coupled to the low-band portion 102 and has a feeding point 104 and a ground point 105.
  • the feeding point 104 is coupled to a RF (radio frequency) module 140 disposed on a substrate 120 of the system, as shown in FIG. 1B.
  • FIG. 1B shows a wireless communication device 150 using the antenna 100 of FIG. 1A.
  • the wireless communication device 150 includes an antenna 100, an antenna installation region 130, a substrate 120, and a housing 110.
  • the antenna 100 is mounted to the housing 110, the antenna 100 is disposed in the antenna installation region 130, away from other components on the substrate 120.
  • the high-band portion 101 is exposed outside the substrate 120 of the wireless communication device 150.
  • the high-band portion 101 is used to transmit and receive high-frequency signals and can prevent energy dissipation caused by nearby components, such as microphones and cameras, at high frequencies.
  • the low-band portion 102 is used to transmit and receive low-frequency signals and can prevent efficiency loss due to the phantom head effect.
  • FIG. 2A shows the antenna 200 according to another embodiment of the invention.
  • the antenna 200 includes a high-band portion 201, a low-band portion 202, and an antenna case 203.
  • the high-band portion 201 is an inverted-F antenna (IFA), and the low-band portion 202 is a PIFA.
  • the high-band portion 201 and the low-band portion 202 are coupled to share the same feeding point 204 and ground point 205.
  • the feeding point 204 is coupled to a RF module 240 disposed on a substrate 220 of the system, as shown in FIG. 2B.
  • the low-band portion 202 is disposed on the antenna case 203, and the high-band portion 201 has a turning portion.
  • FIG. 2B shows a wireless communication device 250 containing the antenna 200 of FIG. 2A.
  • the wireless communication device 250 includes an antenna 200, an antenna installation region 230, a substrate 220, and a housing 210.
  • the antenna 200 is mounted to the housing 210, the antenna 200 is disposed in the antenna installation region 230, away from other components on the substrate 220.
  • the high-band portion 201 in this embodiment is hidden inside the case 203 of the antenna 200.
  • a clearance area is required for the high-band portion 201 to keep an appropriate distance from the grounded surface of the substrate.
  • This embodiment thereby achieves the same effects as in the first embodiment.
  • this embodiment prevent the antenna from being damaged as a result of being exposed to the environment, but it also reduces additional complications in circuit design and inconvenience in carrying.
  • the entire case of the wireless communication device can keep its integrity, and the antenna has a longer lifetime.
  • the disclosed antenna can simultaneously prevent efficiency loss caused by nearby components and the phantom head effect. Combining the aforementioned advantages, the disclosed antenna can be widely applied to future wireless communication devices.
  • the antennas in the above-mentioned embodiments are only examples of the invention and thus should not be used to restrict the types of antennas in the invention.
  • the high-band portion of the invention may be a spiral antenna, IFA, or meander-line antenna.

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

Abstract

An antenna comprises an external high-band portion and an internal low-band portion. The external high-band portion reduces energy dissipation from nearby components, and the internal low-band portion reduces the phantom head effect. The antenna combines the external high-band portion and the internal low-band portion, utilizing the advantages of the two portions to benefit the receiving efficiency of the antenna.
Figure imgaf001

Description

    BACKGROUND OF THE INVENTION Field of Invention
  • The invention relates to an antenna and, in particular, to an antenna that can reduce energy dissipation from nearby components and phantom head effect.
    • Related Art
  • With technological advances, the primary hotbed of communication techniques has gradually shifted from wired communications to wireless communications, as can be seen from their popularity in wireless home electronics and mobile phones. The transmitting medium of choice has changed from conventional metal wires (such as coaxial cables) to air. Antennas are the key component of wireless communication devices for sending and receiving electromagnetic (EM) signals. That is, a wireless communication device needs to have an antenna in order to send or receive EM waves. Therefore, the antenna is an indispensable component in wireless communication devices.
  • In conventional wireless communication devices, most antennas are external. In recent years, with the rapid advances of mobile technology, more antennas have become internal.
  • Nevertheless, both external and internal antennas have their drawbacks in transmitting and receiving signals. For example, external antennas experience the phantom head effect at low frequencies and thus have large efficiency loss. Internal antennas have serious energy dissipation when in close proximity to components such as microphones or cameras.
  • It is therefore desirable to provide an antenna that can solve the aforementioned problems simultaneously.
    • SUMMARY OF THE INVENTION
  • An objective of the invention is to provide an antenna not only for reducing energy dissipation caused by internal components at high frequencies but also for reducing efficiency loss caused by the phantom head effect at low frequencies.
  • According to a preferred embodiment of the invention, a high-band portion and a low-band portion of an antenna are separately formed and disposed on an antenna case. The high-band portion is exposed outside the antenna case to avoid the energy dissipation at high frequencies due to nearby components. The low-band portion is hidden inside the antenna case to reduce the efficiency loss at low frequencies due to the phantom head effect. Therefore, the invention can solve the conventional problems described above.
  • According to another embodiment of the invention, a high-band portion and a low-band portion are separately formed and disposed on an antenna case. In addition, the high-band portion is bent so that it is completely hidden inside the antenna case, and a clearance area is formed in the antenna case to keep the high-band portion from the grounded surface of the substrate by an appropriate distance. Therefore, the antenna is prevented from being damaged as a result of being exposed to the environment.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These and other features, aspects and advantages of the invention will become apparent by reference to the following description and accompanying drawings which are given by way of illustration only, and thus are not limitative of the invention, and wherein:
    • FIG. 1A shows an antenna according to a preferred embodiment of the invention;
    • FIG. 1B shows a wireless communication device using the antenna of FIG. 1A;
    • FIG. 2A shows an antenna according to another embodiment of the invention; and
    • FIG. 2B shows a wireless communication device using the antenna of FIG. 2A.
    DETAILED DESCRIPTION OF THE INVENTION
  • The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
  • FIG. 1A shows an antenna 100 according to a preferred embodiment of the invention. The antenna 100 includes a high-band portion 101, a low-band portion 102, and an antenna case 103.
  • In this embodiment, the high-band portion 101 is a meander-line antenna exposed outside the antenna case 103. The low-band portion 102 is a planar inverted-F antenna (PIFA) hidden inside the antenna case 103. The high-band portion 101 is coupled to the low-band portion 102 and has a feeding point 104 and a ground point 105. The feeding point 104 is coupled to a RF (radio frequency) module 140 disposed on a substrate 120 of the system, as shown in FIG. 1B.
  • FIG. 1B shows a wireless communication device 150 using the antenna 100 of FIG. 1A. The wireless communication device 150 includes an antenna 100, an antenna installation region 130, a substrate 120, and a housing 110. When the antenna 100 is mounted to the housing 110, the antenna 100 is disposed in the antenna installation region 130, away from other components on the substrate 120. The high-band portion 101 is exposed outside the substrate 120 of the wireless communication device 150.
  • As shown in FIG. 1B, the high-band portion 101 is used to transmit and receive high-frequency signals and can prevent energy dissipation caused by nearby components, such as microphones and cameras, at high frequencies. The low-band portion 102 is used to transmit and receive low-frequency signals and can prevent efficiency loss due to the phantom head effect.
  • FIG. 2A shows the antenna 200 according to another embodiment of the invention. The antenna 200 includes a high-band portion 201, a low-band portion 202, and an antenna case 203.
  • In this embodiment, the high-band portion 201 is an inverted-F antenna (IFA), and the low-band portion 202 is a PIFA. The high-band portion 201 and the low-band portion 202 are coupled to share the same feeding point 204 and ground point 205. The feeding point 204 is coupled to a RF module 240 disposed on a substrate 220 of the system, as shown in FIG. 2B. The low-band portion 202 is disposed on the antenna case 203, and the high-band portion 201 has a turning portion.
  • FIG. 2B shows a wireless communication device 250 containing the antenna 200 of FIG. 2A. The wireless communication device 250 includes an antenna 200, an antenna installation region 230, a substrate 220, and a housing 210. When the antenna 200 is mounted to the housing 210, the antenna 200 is disposed in the antenna installation region 230, away from other components on the substrate 220.
  • In comparison with FIG. 1A, the high-band portion 201 in this embodiment is hidden inside the case 203 of the antenna 200. However, a clearance area is required for the high-band portion 201 to keep an appropriate distance from the grounded surface of the substrate. This embodiment thereby achieves the same effects as in the first embodiment. Moreover, not only does this embodiment prevent the antenna from being damaged as a result of being exposed to the environment, but it also reduces additional complications in circuit design and inconvenience in carrying. In addition, the entire case of the wireless communication device can keep its integrity, and the antenna has a longer lifetime.
  • The disclosed antenna can simultaneously prevent efficiency loss caused by nearby components and the phantom head effect. Combining the aforementioned advantages, the disclosed antenna can be widely applied to future wireless communication devices.
  • It should be emphasized that the antennas in the above-mentioned embodiments are only examples of the invention and thus should not be used to restrict the types of antennas in the invention. For example, the high-band portion of the invention may be a spiral antenna, IFA, or meander-line antenna.
  • The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
  • While the invention has been described by way of example and in terms of the preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Claims (10)

  1. An antenna for a wireless communication device including a substrate and a radio frequency module disposed on the substrate, comprising:
    an antenna case;
    a high-band portion disposed on the antenna case and exposed outside the substrate;
    a low-band portion coupled to the high-band portion and disposed on the antenna case; and
    a feeding point coupling the high-band portion and the low-band portion to the radio frequency module.
  2. The antenna of claim 1, wherein the high-band portion is exposed outside the antenna case.
  3. The antenna of claim 1, wherein the high-band portion is hidden inside the antenna case.
  4. The antenna of claim 1, wherein the high-band portion is a meander-line antenna.
  5. The antenna of claim 1, wherein the high-band portion is an inverted-F antenna (IFA).
  6. The antenna of claim 1, wherein the low-band portion is a planar inverted-F antenna (PIFA).
  7. A wireless communication device, comprising:
    a substrate having a radio frequency module disposed thereon; and
    an antenna including:
    an antenna case;
    a high-band portion disposed on the antenna case and exposed outside the substrate;
    a low-band portion coupled to the high-band portion and disposed on the antenna case; and
    a feeding point coupling the high-band portion and the low-band portion to the radio frequency module.
  8. The wireless communication device of claim 7, wherein the high-band portion is a meander-line antenna.
  9. The wireless communication device of claim 7, wherein the high-band portion is an inverted-F antenna (TFA).
  10. The wireless communication device of claim 7, wherein the low-band portion is a planar inverted-F antenna (PIFA).
EP06119407A 2005-09-23 2006-08-23 An antenna combining external high-band portion and internal low-band portion Ceased EP1770825A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2005101089564A CN1937311A (en) 2005-09-23 2005-09-23 Integrated exposed high frequency and hidden low frequency antenna installation

Publications (1)

Publication Number Publication Date
EP1770825A1 true EP1770825A1 (en) 2007-04-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103296387B (en) * 2013-05-07 2016-01-06 瑞声科技（南京）有限公司 Combined antenna and apply the electronic equipment of this combined antenna
CN104218329A (en) * 2014-09-05 2014-12-17 昆山联滔电子有限公司 Combined antenna

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067851A1 (en) * 1998-06-24 1999-12-29 Allgon Ab An antenna device, a method for manufacturing an antenna device and a radio communication device including an antenna device
EP1168491A1 (en) * 2000-05-23 2002-01-02 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Multi frequency-band antenna
EP1248317A1 (en) 2001-04-02 2002-10-09 Nokia Corporation Electrically tunable multiband planar antenna
US20020175866A1 (en) 2001-05-25 2002-11-28 Gram Hans Erik Antenna
WO2003047026A1 (en) 2001-11-27 2003-06-05 Allgon Ab An antenna assembly, a method of assembling and mounting an antenna assembly and a radio communication device
WO2004057701A1 (en) 2002-12-22 2004-07-08 Fractus S.A. Multi-band monopole antenna for a mobile communications device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067851A1 (en) * 1998-06-24 1999-12-29 Allgon Ab An antenna device, a method for manufacturing an antenna device and a radio communication device including an antenna device
EP1168491A1 (en) * 2000-05-23 2002-01-02 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Multi frequency-band antenna
EP1248317A1 (en) 2001-04-02 2002-10-09 Nokia Corporation Electrically tunable multiband planar antenna
US20020175866A1 (en) 2001-05-25 2002-11-28 Gram Hans Erik Antenna
WO2003047026A1 (en) 2001-11-27 2003-06-05 Allgon Ab An antenna assembly, a method of assembling and mounting an antenna assembly and a radio communication device
WO2004057701A1 (en) 2002-12-22 2004-07-08 Fractus S.A. Multi-band monopole antenna for a mobile communications device

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CN1937311A (en) 2007-03-28

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