EP2031695A1 - Dispositif de communication mobile sans fil incluant une antenne multibande unipolaire repliée et procédés associés - Google Patents

Dispositif de communication mobile sans fil incluant une antenne multibande unipolaire repliée et procédés associés Download PDF

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Publication number
EP2031695A1
EP2031695A1 EP07115313A EP07115313A EP2031695A1 EP 2031695 A1 EP2031695 A1 EP 2031695A1 EP 07115313 A EP07115313 A EP 07115313A EP 07115313 A EP07115313 A EP 07115313A EP 2031695 A1 EP2031695 A1 EP 2031695A1
Authority
EP
European Patent Office
Prior art keywords
wireless communications
impedance matching
communications device
mobile wireless
faces
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.)
Withdrawn
Application number
EP07115313A
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German (de)
English (en)
Inventor
Shirook Ali
Geyi Wen
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.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
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 Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP07115313A priority Critical patent/EP2031695A1/fr
Priority to CA2639203A priority patent/CA2639203C/fr
Publication of EP2031695A1 publication Critical patent/EP2031695A1/fr
Withdrawn legal-status Critical Current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
    • H01Q9/40—Element having extended radiating surface
    • 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

Definitions

  • the present invention relates to the field of communications systems, and, more particularly, to mobile wireless communications devices and antennas therefor, and related methods.
  • Planar inverted-F antennas are commonly used for handheld devices.
  • PIFAs typically have relatively narrow bandwidths.
  • various techniques are sometimes used to increase the effective bandwidth of PIFAs, such as using parasitic elements, additional shorting pins, etc.
  • Such structures can unduly complicate the antenna structure and increase its cost. See, e.g., U.S. Patent No. 7,023,387 ; Liu et al., "Dual-Frequency Planar Inverted-F Antenna," IEEE Transactions on Antennas and Propagation, vol. 45, no.
  • monopole antenna typically has a relatively wider bandwidth as compared with that of a PIFA.
  • a significant drawback of such monopole antennas is that they typically require more surface area (i.e., they are larger) than a comparable PIFA.
  • Another drawback of monopole antennas is that, due in part to the size constraints, they are typically implemented as external antennas, whereas a PIFA is easier to implement as an internal antenna.
  • the antenna arrangement is for use in the housing of a portable communications device, such as a laptop.
  • the antenna arrangement includes a pair of spaced folded monopole antennas in 2D.
  • Each antenna includes a first printed circuit board having a conducting surface that forms a ground plane.
  • Mounted on the first circuit board is a second printed circuit board having a right-angled strip of conducting material, which forms a folded monopole radiating element. The folding of the monopole reduces its height, to thereby enable it to fit into small casings and the like.
  • a shunt inductance is introduced between the monopole and the ground plane.
  • the antennas are mounted within cavities that can be lined or coated with metallic material, to improve the radiation patterns of the antennas and isolate them from the electronic components of the communications system.
  • FIG. 1 is a schematic block diagram of a mobile wireless communications device in accordance with an exemplary embodiment including a folded monopole antenna (FMA).
  • FMA folded monopole antenna
  • FIG. 2 is a top perspective view of a printed circuit board (PCB) with a folded monopole antenna thereon in accordance with one aspect.
  • PCB printed circuit board
  • FIG. 3 is a bottom perspective view of the PCB and folded monopole antenna of FIG. 2 .
  • FIG. 4 is a rotated top perspective view of the PCB and folded monopole antenna of FIG. 2 .
  • FIG. 5 is a 2D plan view (i.e., unfolded) of the conductive trace of the folded monopole antenna of FIG. 2 .
  • FIGS. 6A and 6B are enlarged perspective views of the dielectric body of the folded monopole antenna as seen in FIGS. 2 and 3 , respectively, with the conductive trace removed.
  • FIG. 7 is a graph of return loss vs. frequency for an embodiment of the antenna of FIG. 2 .
  • FIG. 8 is a measured radiation pattern diagram for an embodiment of the antenna of FIG. 2 at 919 MHz.
  • FIG. 9 is a measured radiation pattern diagram for an embodiment of the antenna of FIG. 2 at 1.97 GHz.
  • FIG. 10 is a schematic block diagram illustrating exemplary components of a mobile wireless communications device in which the folded monopole antenna of FIG. 2 may be used.
  • a mobile wireless communications device may include a portable housing, a printed circuit board (PCB) carried within the portable housing, and wireless communications circuitry carried by the PCB within the portable housing.
  • the device may also include a folded monopole antenna assembly.
  • the folded monopole antenna assembly may include a dielectric body adjacent the PCB and having a generally rectangular shape defining opposing top and bottom faces, opposing first and second end faces, and opposing first and second side faces.
  • the antenna assembly may also include a conductive trace coupled to the wireless communications circuitry having a first end section extending along the first end face, a second end section extending along the second end face, and an intermediate section extending along the top, bottom, first side and second side faces.
  • the conductive trace may further include at least one conductive impedance matching patch coupled to the intermediate section.
  • the at least one conductive impedance matching patch may comprise a plurality of spaced-apart impedance matching patches.
  • the at least one conductive impedance matching patch may extend along one or more of the top face, the first and second end faces, and the first and second side faces.
  • the first end section may define a feed point for the conductive trace.
  • the first and second side faces may have greater widths than the first and second end faces.
  • the wireless communications circuitry may comprise a cellular transceiver.
  • the conductive trace may operate over a plurality of radio frequency (RF) communications bands.
  • a folded monopole antenna assembly for a mobile wireless communications device and method for making the same are also provided.
  • the method may include forming a dielectric body having a generally rectangular shape defining opposing top and bottom faces, opposing first and second end faces, and opposing first and second side faces.
  • the method may further include forming a conductive trace on the dielectric body having a first end section extending along the first end face, a second end section extending along the second end face, and an intermediate section extending along the top, bottom, first side and second side faces.
  • a mobile wireless communications device 20 illustratively includes a portable housing 21 , a printed circuit board (PCB) 22 carried within the portable housing, and wireless communications circuitry 23 carried by the PCB within the portable housing.
  • the wireless communications circuitry 23 is carried on a top dielectric layer 25 of the PCB 22 ( FIG. 2 ), and the PCB also has a ground plane 26 on a bottom side thereof ( FIG. 3 ) opposite the top dielectric layer.
  • the wireless communications circuitry 23 may comprise cellular communications circuitry, e.g., a cellular transceiver.
  • Other wireless communications circuitry such as wireless local area network (WLAN) and satellite positioning (e.g., GPS) communications circuitry, may also be used, as will be discussed further below.
  • WLAN wireless local area network
  • GPS satellite positioning
  • the device 20 further illustratively includes a folded monopole antenna assembly 24 .
  • the folded monopole antenna assembly 24 illustratively includes a dielectric body or frame 30 adjacent the PCB 22 and having a generally rectangular shape defining opposing top and bottom faces 35 and 36 , opposing first and second end faces 37 and 38 , and opposing first and second side faces 39 and 40 (see FIGS. 6A and 6B ).
  • the edges of the body 30 are shown as being 90° (i.e., squared off), these edges/corners may be rounded, etc., in some embodiments.
  • the antenna assembly 24 also illustratively includes a conductive trace coupled to the wireless communications circuitry 23 having a first end section 41 extending along the first end face 37 , a second end section 42 extending along the second end face 38, and an intermediate section 43 extending along the top, bottom, first side and second side faces 35, 36, 39 and 40 .
  • the conductive trace defines a folded monopole antenna element, the unfolded two-dimensional (2D) structure of which is shown in FIG. 5 .
  • the conductive trace further includes three conductive impedance matching patches P 1 , P 2 , and P 3 spaced-apart along the conductive trace and coupled to the intermediate section 43 , as shown. It should be noted that in other embodiments, however, different numbers, shapes, and/or placements of impedance matching patches may be used, or none at all.
  • the patch P 1 is on the second side face 40
  • the second patch P 2 is on the top face 35 and the first side face 39
  • the third patch P 3 is on the first side face 39 and the second end face 38.
  • the patches P 1 , P 2 , and P 3 advantageously improve matching for the low and high frequency bands, as will be appreciated by those skilled in the art.
  • the wireless communications circuitry 23 includes cellular transmitter/receiver circuitry for communicating over a plurality of cellular communications bands.
  • cellular bands may include Global System for Mobile communication (GSM), International Mobile Telecommunications-2000 (IMT), Universal Mobile Telecommunications System (UMTS), Digital Communication Services (DCS), and/or Personal Communication Services (PCS) bands.
  • GSM Global System for Mobile communication
  • IMT International Mobile Telecommunications-2000
  • UMTS Universal Mobile Telecommunications System
  • DCS Digital Communication Services
  • PCS Personal Communication Services
  • RF wireless radio frequency
  • Bluetooth/802.11 WLAN circuitry may also be electrically coupled to the folded monopole antenna assembly 24 in different embodiments, as well as satellite positioning receiver circuitry (e.g., GPS, Galileo, GLONASS, etc.).
  • the folded monopole antenna assembly 24 advantageously provides the multi-band and compact characteristics of a PIFA, as well as the broadband, environmental isolation, and simplicity characteristics of a monopole antenna.
  • the antenna 24 supports at least six frequency bands (i.e., hex-band), although other numbers of bands may be supported in different embodiments. More particularly, in this exemplary embodiment the antenna assembly 24 supports GSM 800/900/1800/1900, IMT-2000, UMTS 2200, DCS/PCS 1800/1900, Bluetooth 2400, and WLAN 2450, as shown in the measured return loss vs. frequency graph of FIG. 7 .
  • the measured radiation pattern for the exemplary hex-band antenna 24 at operating frequencies of 919 MHz and 1.97 GHz are shown in FIGS. 8 and 9 , respectively.
  • a length L of the conductive trace 27 is a quarter wavelength at about 800 MHz, although different length-to-wavelength ratios are also possible in different embodiments.
  • the length L controls the fundamental resonating mode of the antenna 24, as will be appreciated by those skilled in the art.
  • the modes at higher frequencies are generated at various portions of this length.
  • the 3D wrapping of the antenna around the dielectric body 30 controls the current distribution along the monopole length L , and thus controls the electrical length(s) for the higher resonant frequency band(s) as well as antenna bandwidth, as will also be appreciated by those skilled in the art.
  • the antenna assembly 24 has dimensions of 10mm ⁇ 20mm ⁇ 8.5mm
  • the ground plane 26 has dimensions of 55mm ⁇ 87mm
  • a 1.5mm thick FR-4 dielectric ground plane 25 with relative permittivity 4.4 may support the antenna and the ground plane.
  • other dimensions and/or materials may be used in different embodiments.
  • the antenna assembly 24 therefore advantageously provides broadband operation in the supported frequency bands.
  • the relatively small size of the antenna assembly 24 results from "wrapping" the conductive trace 43 into the above-described 3D structure, which provides a relatively compact structure in addition to a relatively simplicity due to the fact that it is a monopole antenna.
  • the antenna assembly 24 advantageously provides desired matching properties at the supported frequency bands without the need for additional matching circuitry, although such circuitry may be used in some embodiments if desired, as will be appreciated by those skilled in the art.
  • the 3D shape of the antenna assembly 24 not only significantly reduces the antenna size, but it may also provide radiation pattern diversity as well.
  • a method for making the folded monopole antenna 24 may include forming the dielectric body 30 having a generally rectangular shape defining opposing top and bottom faces 35 and 36 , opposing first and second end faces 37 and 38, and opposing first and second side faces 39 and 40.
  • the method may further include forming a conductive trace 27 on the dielectric body 30 having a first end section 41 extending along the first end face 37 , a second end section 42 extending along the second end face 38 , and an intermediate section extending along the top, bottom, first side and second side faces 35, 36, 39 , and 40 .
  • the conductive trace 27 may be etched on a supporting dielectric surface, as will be appreciated by those skilled in the art.
  • the processing device 1800 in addition to its operating system functions, enables execution of software applications 1300A-1300N on the device 1000.
  • a predetermined set of applications that control basic device operations, such as data and voice communications 1300A and 1300B, may be installed on the device 1000 during manufacture.
  • a personal information manager (PIM) application may be installed during manufacture.
  • the PIM is preferably capable of organizing and managing data items, such as e-mail, calendar events, voice mails, appointments, and task items.
  • the PIM application is also preferably capable of sending and receiving data items via a wireless network 1401.
  • the PIM data items are seamlessly integrated, synchronized and updated via the wireless network 1401 with the device user's corresponding data items stored or associated with a host computer system.
  • the communications subsystem 1001 includes a receiver 1500 , a transmitter 1520, and one or more antennas 1540 and 1560 .
  • the communications subsystem 1001 also includes a processing module, such as a digital signal processor (DSP) 1580 , and local oscillators (LOs) 1601 .
  • DSP digital signal processor
  • LOs local oscillators
  • a mobile device 1000 may include a communications subsystem 1001 designed to operate with the Mobitex TM , Data TAC TM or General Packet Radio Service (GPRS) mobile data communications networks, and also designed to operate with any of a variety of voice communications networks, such as AMPS, TDMA, CDMA, WCDMA, PCS, GSM, EDGE, etc. Other types of data and voice networks, both separate and integrated, may also be utilized with the mobile device 1000 .
  • the mobile device 1000 may also be compliant with other communications standards such as 3GSM, 3GPP, UMTS, etc.
  • Network access requirements vary depending upon the type of communication system. For example, in the Mobitex and DataTAC networks, mobile devices are registered on the network using a unique personal identification number or PIN associated with each device. In GPRS networks, however, network access is associated with a subscriber or user of a device. A GPRS device therefore requires a subscriber identity module, commonly referred to as a SIM card, in order to operate on a GPRS network.
  • SIM card subscriber identity module
  • the mobile device 1000 may send and receive communications signals over the communication network 1401 .
  • Signals received from the communications network 1401 by the antenna 1540 are routed to the receiver 1500 , which provides for signal amplification, frequency down conversion, filtering, channel selection, etc., and may also provide analog to digital conversion. Analog-to-digital conversion of the received signal allows the DSP 1580 to perform more complex communications functions, such as demodulation and decoding.
  • signals to be transmitted to the network 1401 are processed (e.g. modulated and encoded) by the DSP 1580 and are then provided to the transmitter 1520 for digital to analog conversion, frequency up conversion, filtering, amplification and transmission to the communication network 1401 (or networks) via the antenna 1560.
  • the DSP 1580 provides for control of the receiver 1500 and the transmitter 1520 .
  • gains applied to communications signals in the receiver 1500 and transmitter 1520 may be adaptively controlled through automatic gain control algorithms implemented in the DSP 1580.
  • a received signal such as a text message or web page download
  • the communications subsystem 1001 is input to the processing device 1800 .
  • the received signal is then further processed by the processing device 1800 for an output to the display 1600 , or alternatively to some other auxiliary I/O device 1060 .
  • a device user may also compose data items, such as e-mail messages, using the keypad 1400 and/or some other auxiliary I/O device 1060 , such as a touchpad, a rocker switch, a thumb-wheel, or some other type of input device.
  • the composed data items may then be transmitted over the communications network 1401 via the communications subsystem 1001 .
  • a voice communications mode In a voice communications mode, overall operation of the device is substantially similar to the data communications mode, except that received signals are output to a speaker 1100, and signals for transmission are generated by a microphone 1120.
  • Alternative voice or audio I/O subsystems such as a voice message recording subsystem, may also be implemented on the device 1000.
  • the display 1600 may also be utilized in voice communications mode, for example to display the identity of a calling party, the duration of a voice call, or other voice call related information.
  • the short-range communications subsystem enables communication between the mobile device 1000 and other proximate systems or devices, which need not necessarily be similar devices.
  • the short-range communications subsystem may include an infrared device and associated circuits and components, or a Bluetooth TM communications module to provide for communication with similarly-enabled systems and devices.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
EP07115313A 2007-08-30 2007-08-30 Dispositif de communication mobile sans fil incluant une antenne multibande unipolaire repliée et procédés associés Withdrawn EP2031695A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07115313A EP2031695A1 (fr) 2007-08-30 2007-08-30 Dispositif de communication mobile sans fil incluant une antenne multibande unipolaire repliée et procédés associés
CA2639203A CA2639203C (fr) 2007-08-30 2008-08-29 Dispositif de communication mobile sans fil avec antenne multi bandes monopole replie et methodes connexes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07115313A EP2031695A1 (fr) 2007-08-30 2007-08-30 Dispositif de communication mobile sans fil incluant une antenne multibande unipolaire repliée et procédés associés

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EP2031695A1 true EP2031695A1 (fr) 2009-03-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106129636A (zh) * 2016-06-08 2016-11-16 广东欧珀移动通信有限公司 移动终端的gnss天线系统、移动终端及电子设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2323217B1 (fr) * 2009-11-13 2014-04-30 BlackBerry Limited Antenne pour communication mimo multimodale dans des dispositifs portables
US8754814B2 (en) 2009-11-13 2014-06-17 Blackberry Limited Antenna for multi mode MIMO communication in handheld devices
CN105375106B (zh) * 2014-08-07 2018-04-20 维瓦灵克有限公司（开曼群岛） 可拉伸多层无线通信的可穿戴贴片

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288731A (ja) * 1995-04-17 1996-11-01 Zanavy Informatics:Kk ２周波共用プリントアンテナ
EP0863571A2 (fr) 1997-03-05 1998-09-09 Murata Manufacturing Co., Ltd. Dispositif d'image mobile et dispositif d'antenne utilisée pour un tel dispositif d'image
US20030001781A1 (en) 2001-06-29 2003-01-02 Takayoshi Konishi Antenna element with conductors formed on outer surfaces of device substrate
JP2003289214A (ja) 2002-03-27 2003-10-10 Kyocera Corp 小型アンテナとその製造方法
US20040008141A1 (en) 2002-06-19 2004-01-15 Kyocera Corporation Surface-mount type antenna and antenna apparatus
JP2004056580A (ja) * 2002-07-22 2004-02-19 Fdk Corp チップアンテナ素子
JP2005080229A (ja) 2003-09-03 2005-03-24 Mitsubishi Materials Corp チップアンテナ及びその製造方法
US20060152415A1 (en) 2005-01-13 2006-07-13 Cirex Technology Corporation Ceramic chip antenna

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288731A (ja) * 1995-04-17 1996-11-01 Zanavy Informatics:Kk ２周波共用プリントアンテナ
EP0863571A2 (fr) 1997-03-05 1998-09-09 Murata Manufacturing Co., Ltd. Dispositif d'image mobile et dispositif d'antenne utilisée pour un tel dispositif d'image
US20030001781A1 (en) 2001-06-29 2003-01-02 Takayoshi Konishi Antenna element with conductors formed on outer surfaces of device substrate
JP2003289214A (ja) 2002-03-27 2003-10-10 Kyocera Corp 小型アンテナとその製造方法
US20040008141A1 (en) 2002-06-19 2004-01-15 Kyocera Corporation Surface-mount type antenna and antenna apparatus
JP2004056580A (ja) * 2002-07-22 2004-02-19 Fdk Corp チップアンテナ素子
JP2005080229A (ja) 2003-09-03 2005-03-24 Mitsubishi Materials Corp チップアンテナ及びその製造方法
US20060152415A1 (en) 2005-01-13 2006-07-13 Cirex Technology Corporation Ceramic chip antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106129636A (zh) * 2016-06-08 2016-11-16 广东欧珀移动通信有限公司 移动终端的gnss天线系统、移动终端及电子设备

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CA2639203C (fr) 2012-07-24
CA2639203A1 (fr) 2008-12-05

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