EP1328999A1 - Appareil de communication portable comprenant un afficheur et une antenne dotee d'un element rayonnant plat - Google Patents

Appareil de communication portable comprenant un afficheur et une antenne dotee d'un element rayonnant plat

Info

Publication number
EP1328999A1
EP1328999A1 EP01970449A EP01970449A EP1328999A1 EP 1328999 A1 EP1328999 A1 EP 1328999A1 EP 01970449 A EP01970449 A EP 01970449A EP 01970449 A EP01970449 A EP 01970449A EP 1328999 A1 EP1328999 A1 EP 1328999A1
Authority
EP
European Patent Office
Prior art keywords
antenna
display
communication apparatus
portable communication
radiating member
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Withdrawn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
EP01970449A
Other languages
German (de)
English (en)
Inventor
Zhinong Ying
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Priority claimed from SE0003426A external-priority patent/SE523191C2/sv
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP1328999A1 publication Critical patent/EP1328999A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect

Definitions

  • the present invention relates to the field of radio communication and, in more particular, to a portable communication apparatus of the type having a display and at least one antenna.
  • Examples of a portable communication apparatus as set out above are a mobile telephone, a cordless telephone, a portable digital assistant, a communicator, a paging device, an electronic payment device, or a portable navigating device.
  • the mobile or cellular telephone is currently believed to be the most prominent in terms of market penetration and sales volumes. Therefore, for the rest of this document, reference will be made to a mobile or cellular telephone for any commercially available mobile communications network, such as GSM, UMTS or D-AMPS .
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Communications Service
  • Microstrip patch antennas and planar inverted F antennas are examples of such antennas. They are advantageous, compared to the above-described conventional antennas, in terms of small size and low weight.
  • conventional micro- strip patch antennas as well as conventional PIFA antennas are still too large to fit inside a miniaturized mobile telephone chassis. This is expected to be a problem parti- cularly for new generations of mobile telephones, which will use multiple antennas for different purposes, such as cellular telecommunication, access to wireless LAM, satellite communication (GPS) and diversity.
  • WO 00/03453 proposes a miniature printed spiral antenna adapted to be built into a mobile terminal .
  • Antenna matching is achieved by a matching bridge positioned between a feeding pin and a grounded post.
  • the size of this antenna is 20-30% of the size of a conventional PIFA antenna.
  • a problem with modern mobile telephones and similar portable communication equipment is that the miniaturized apparatus size limits the surface area available for a built-in antenna. The problem is particularly pronounced for a mobile telephone with multiple antennas.
  • Some future mobile telephones are believed to offer satellite navigation functionality (such as GPS) in addition to traditional cellular telecommunication and, possibly, wireless access to local area networks (LAN) as well as diversity functionality.
  • satellite navigation functionality such as GPS
  • LAN local area networks
  • the problem of fitting a built-in GPS antenna in a miniaturized mobile telephone is accentuated by the fact that the GPS antenna needs some isolation from the cellular antenna.
  • GPS functionality requires a more direc- tional antenna than a normal omni-directional cellular antenna. Additionally, since GPS operates at 1.57 GHz, the wavelength is about 21 cm. Therefore, a half-wave GPS antenna in open air will be about 10 cm in size.
  • the present invention seeks to remedy the problems set out above, when a miniaturized portable communication apparatus is to be provided with a built-in antenna, for which it is hard to find enough available surface area in the apparatus. More particularly, it is an object of the present invention to allow a miniaturized mobile telephone to include a fully operational GPS antenna, which will not interfere with the cellular antenna and which will not occupy any externally visible surface area of the mobile telephone .
  • an integrated display and antenna device having a multi-layer structure, where the display (preferably an LCD) is provided at an upper layer and a plane patch antenna element is attached behind the display as a lower layer.
  • the multilayer structure will include a light-guiding layer adapted to illuminate the display layer, as well as a dielectric antenna substrate, upon which the patch antenna element is supported.
  • the multi-layer structure will preferably also include an antenna feeding layer having a feeding pin, coupled to GPS radio circuitry in the mobile telephone, as well as a grounded matching post.
  • the antenna feeding layer may comprise two feeding pins, which are connected in a one-to-two icrostrip power divider con- figuration, so that the two feeding pins will have a phase difference of 90°, so as to obtain circular polarization.
  • the dielectric substrate layer may comprise a dielectric framework in the form of a grid, wherein the dielectric constant may be varied depending on the material chosen for the dielectric framework as well as the grid density. This will allow the resonant frequency of the patch antenna element to be tuned to the appropriate frequency (e.g. the GPS frequency at 1.57 GHz).
  • Fig. 1 is a schematic front view of a portable communication apparatus according to the preferred embodiment, as well as the environment it is adapted to operate in
  • Fig. 2 is a schematic sectional side view of the portable communication apparatus shown in Fig. 1,
  • Fig. 3 is a schematic block diagram of the portable communication apparatus shown in Figs. 1 and 2,
  • Fig. 4 is a schematic perspective sectional view of a combined display and antenna device in the portable communication apparatus of Figs. 1-3
  • Fig. 5 illustrates a detail of the combined display and antenna shown in Fig. 4,
  • Fig. 6 shows another detail of Fig. 4,
  • Fig. 7 is a schematic perspective sectional view of a combined display and antenna device according to an alternative embodiment
  • Fig. 8 illustrates a detail of the embodiment shown in Fig. 7, and
  • Fig. 9 illustrates another detail of the embodiment shown in Fig . 7.
  • Figs. 1 and 2 illustrate a mobile telephone 10 as seen from the front and the side, respectively.
  • the main components of the mobile telephone 10 are further illustrated in a block diagram in Fig. 3.
  • the mobile telephone 10 has no externally mounted antenna; instead the telephone has a built-in cellular antenna 21, which is mounted on a printed circuit board 20.
  • a cellular radio transceiver 22 is also mounted on the printed circuit board 20 and is electrically connected to the cellular antenna 21 through appropriate conductive patterns or wiring on the printed circuit board 20.
  • the mobile telephone 10 may establish a wireless link 34 to a radio station (base station) 32 in a mobile telecommunications network 30, such as GSM, UMTS or D-AMPS.
  • the cellular antenna 21 and the cellular radio transceiver 22 are not essential to the invention; they can be implemented by commercially available equipment depend- ing on an actual application.
  • the cellular antenna 21 may be a microstrip patch antenna, a PIFA antenna, a meandering microstrip antenna, etc.
  • the cellular antenna 21 will be tuned to the or each frequency band that it is intended to operate in. For instance, if the mobile. telecommunications network 30 is a GSM network, the ⁇ ellu- lar antenna 21 will be tuned for operation in the 900 MHz band and, optionally, the 1800 MHz DCS band and/or the 1900 MHz PCS band.
  • the mobile telephone 10 comprises a number of conventional components, such as a loudspeaker 11, a set of cursor keys 13, an alphanumeric keypad 14 and a microphone 15. These components are not believed to require any detailed description herein.
  • a display 12 is provided at the front portion of the mobile telephone 10 between the loudspeaker 11 and the cursor keys 13.
  • the display 12 appears to be a conventional display, which will present graphical information to the user as a part of a conventional man-machine interface.
  • the display 12 is in fact formed as an upper layer in a multi-layer structure 16, which is mounted to the printed circuit board 20 at an opposite side thereof compared to the cellular antenna 21 and the cellular radio transceiver 22.
  • the display layer 12 is connected through wiring 17 to a display driver 18, which also is mounted to the printed circuit board 20.
  • the multi-layer structure 16 comprises not only the display 12 but also a satellite antenna for establishing a satellite link 44 to a GPS satellite 42.
  • the satellite antenna comprises a patch antenna element, which forms one layer in the multi-layer structure 16.
  • the satellite antenna is connected to a satellite radio 19, which is mounted adjacently to the multi-layer structure 16 on the printed circuit board 20. Consequently, the multi-layer structure 16 constitutes a combined display and satellite antenna device for the mobile telephone 10.
  • the location of the cellular antenna 21 at the back of the mobile telephone 10 will allow this antenna to perform well, when the telephone is kept by the user in a traditional talking position.
  • the integral GPS antenna is mounted behind the display at the front of the mobile telephone 10 and will consequently exhibit good performance, when the mobile telephone 10 is kept in a horizontal position and the display 12 faces upwards .
  • the mobile telephone 10 comprises a main con- troller 22, which preferably is mounted on the printed circuit board 20.
  • the main controller 22 may be implemented by any commercially available microprocessor or another type of programmable logic circuitry.
  • the main controller 22 is operatively connected to the satellite radio 19, the display driver 18 and the cellular radio 22.
  • the satellite radio 19 is connected to the integrated display and satellite antenna 16.
  • the display driver 18 is also connected to the integrated display and satellite antenna 16 through aforesaid wiring 17.
  • the cellular radio 22 is connected to the cellular antenna 21, as has already been mentioned above.
  • the combined display and satellite antenna 16 is formed as a multi-layer structure 16 having a liquid crystal (LCD) layer 12 at its upper level.
  • the display 12 is formed by the uppermost layer of liquid crystals.
  • a light-guiding layer 12a is positioned immediately under the display layer 12. The purpose of the light-guiding layer 12a is to pro- vide illumination for the display 12.
  • the light-guiding layer 12a is made of a transparent material, such as plastic or glass.
  • the light-guiding layer 12a is connected to a set of light-emitting diods (LED) or other sources of light, which are adapted to provide back illumination of the display 12 through the light-guiding layer 12a.
  • LED light-emitting diods
  • a patch antenna element 50 which is made of a conductive material such as copper, silver or gold.
  • the patch antenna element 50 is supported by a dielectric substrate layer 52, which is followed by an antenna feeding circuit layer 54.
  • the size of the display 12 is equal to or less than the patch antenna element 50.
  • the satellite patch antenna element 50 has a square shape in the preferred embodiment. The size of the shape may range from e.g. 3 cm to 10 cm depending on the dielectric properties of the underlying dielectric substrate layer 52. In a case where the dielectric substrate layer 52 has a dielectric constant ⁇ r essentially equal to 1, the size of the patch antenna element 50 will be about 10 cm in order to act as a half-wave antenna for GPS satellite communication in the 1.57 GHz frequency band.
  • the dielectric substrate layer 52 is illustrated in more detail in Fig. 5.
  • the layer 52 comprises a dielectric framework having the form of a grid.
  • the grid 52 comprises a plurality of dielectric ribs 56, which extend in two orthogonal directions in parallel with the patch antenna element 50.
  • the dielectric grid framework 52 may preferably be made of teflon, noryl or polystyrene.
  • the cubic volumes 58 formed between the ribs 56 will contain nothing but air.
  • the equivalent dielectric constant ⁇ r of the entire dielectric substrate layer 52 may be varied by choosing different dielectric materials for the framework and also by varying the grid density, i.e. the distances between adjacent ribs 56.
  • the antenna feeding network layer 54 is illustrated in more detail in Fig. 6 and comprises a one-to-two micro- strip power divider having a first arm 62 and a second arm 64. The two arms 62 and 64 are jointly connected to an RF terminal 60, which is connected to the satellite radio 19.
  • a first feeding pin 66 is connected to one end of the first arm 62 and protrudes in a vertical direction orthogonally to the layer 54 and the microstrip arm 62.
  • a second feeding pin 68 is provided at one end of the second microstrip arm 64.
  • the feeding pins 66, 68 protrude through the dielectric substrate layer 52 (the dielectric framework grid) and are connected to the patch antenna element 50.
  • the two feeding pins 66, 68 are adapted to supply respective satellite radio signals, which have a 90° phase difference that creates the circular polarization of the satellite patch antenna element 50.
  • the antenna feeding network layer 54 is either mounted directly onto the surface of the printed circuit board 20, or does the layer 54 actually form a portion of the surface of the printed circuit board 20.
  • the feeding pins 66, 68 may be implemented as metal pogo pins .
  • the combined display and satellite antenna is formed as a multi-layer structure 16 having a liquid crystal (LCD) layer 12 at its upper level, in similarity with the above-described preferred embodiment.
  • a light-guiding layer 12a is positioned immediately under the display layer 12. N)
  • the display driver 18 is not positioned at a distance from the display/antenna structure 16 (as is the case in Fig. 2) but is instead positioned in close proximity with the display 12 of the multi-layer structure 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transceivers (AREA)
  • Telephone Set Structure (AREA)

Abstract

L'invention concerne un appareil de communication portable (10) comprenant un afficheur (12) et une première antenne dotée d'un élément rayonnant plat (50). L'afficheur (12) et l'élément rayonnant plat (50) sont intégrés dans une structure multi-couche (16) qui est incorporée à l'appareil de communication portable. La première antenne peut, de préférence, être adaptée à la communication par satellite, comme le GPS.
EP01970449A 2000-09-25 2001-09-24 Appareil de communication portable comprenant un afficheur et une antenne dotee d'un element rayonnant plat Withdrawn EP1328999A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE0003426A SE523191C2 (sv) 2000-09-25 2000-09-25 En portabel kommunikationsapparat med en första och en andra antenn varvid den första antennens strålande del är integrerad med en display i en flerskiktsstruktur
SE0003426 2000-09-25
US23927100P 2000-10-12 2000-10-12
US239271P 2000-10-12
PCT/SE2001/002051 WO2002025770A1 (fr) 2000-09-25 2001-09-24 Appareil de communication portable comprenant un afficheur et une antenne dotee d'un element rayonnant plat

Publications (1)

Publication Number Publication Date
EP1328999A1 true EP1328999A1 (fr) 2003-07-23

Family

ID=26655248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01970449A Withdrawn EP1328999A1 (fr) 2000-09-25 2001-09-24 Appareil de communication portable comprenant un afficheur et une antenne dotee d'un element rayonnant plat

Country Status (4)

Country Link
EP (1) EP1328999A1 (fr)
JP (1) JP2004509545A (fr)
AU (1) AU2001290450A1 (fr)
WO (1) WO2002025770A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110212284A (zh) * 2019-06-18 2019-09-06 成都聚利中宇科技有限公司 一种片上天线阵列装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007074441A (ja) * 2005-09-07 2007-03-22 Fujitsu Ltd ガラスアンテナ
JPWO2007083500A1 (ja) * 2006-01-23 2009-06-11 日本板硝子株式会社 アンテナ付き画像表示装置
FI20085699A0 (fi) * 2008-07-04 2008-07-04 Polar Electro Oy Elektro-optinen komponentti
GB201122324D0 (en) 2011-12-23 2012-02-01 Univ Edinburgh Antenna element & antenna device comprising such elements

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829309A (en) * 1986-08-14 1989-05-09 Matsushita Electric Works, Ltd. Planar antenna
US5007105A (en) * 1987-08-14 1991-04-09 Nec Corporation Watch type paging receiver
US5889474A (en) * 1992-05-18 1999-03-30 Aeris Communications, Inc. Method and apparatus for transmitting subject status information over a wireless communications network
US5410749A (en) * 1992-12-09 1995-04-25 Motorola, Inc. Radio communication device having a microstrip antenna with integral receiver systems
US5627548A (en) * 1995-11-30 1997-05-06 Trimble Navigation Limited Navigation wristwear
WO1997044707A2 (fr) * 1996-05-24 1997-11-27 Digital D.J. Incorporated Dispositif d'affichage a cristaux liquides integrant une alimentation par energie solaire et une antenne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0225770A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110212284A (zh) * 2019-06-18 2019-09-06 成都聚利中宇科技有限公司 一种片上天线阵列装置

Also Published As

Publication number Publication date
WO2002025770A1 (fr) 2002-03-28
AU2001290450A1 (en) 2002-04-02
JP2004509545A (ja) 2004-03-25

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