WO2001026181A1 - Resonateur quart d'onde monobande et multibande - Google Patents

Resonateur quart d'onde monobande et multibande Download PDF

Info

Publication number
WO2001026181A1
WO2001026181A1 PCT/US2000/027626 US0027626W WO0126181A1 WO 2001026181 A1 WO2001026181 A1 WO 2001026181A1 US 0027626 W US0027626 W US 0027626W WO 0126181 A1 WO0126181 A1 WO 0126181A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
resonator
conductor
antenna assembly
conductor trace
Prior art date
Application number
PCT/US2000/027626
Other languages
English (en)
Inventor
Royden Honda
Greg Johnson
Robert Hill
Don Keilen
Original Assignee
Rangestar Wireless, Inc.
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 Rangestar Wireless, Inc. filed Critical Rangestar Wireless, Inc.
Publication of WO2001026181A1 publication Critical patent/WO2001026181A1/fr

Links

Classifications

    • 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
    • H01Q1/12—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
    • 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 present invention relates to an antenna assembly for a wireless communication device, such as a cellular telephone.
  • a wireless communication device such as a cellular telephone.
  • the present invention relates to compact antenna assemblies including a GPS-frequency quarter wave resonator and a single or multiple band quarter wave resonator of associated wireless communication devices.
  • Known wireless communications devices such as hand-held cell phones and data modems (LANs) typically are equipped with an external wire antenna (whip), which may be fixed or * telescoping.
  • Such antennas are inconvenient and susceptible to damage or breakage.
  • the overall size of the wire antenna is relatively large in order to provide optimum signal characteristics.
  • a dedicated mounting means and location for the wire antenna are required to be fixed relatively early in the engineering process.
  • the other side of the dipole is provided by the ground traces of the transceiver's printed wiring board (PWB).
  • the external 1/4 wave element may be installed permanently at the top of the transceiver housing or may be threaded into place.
  • the 1/4 wave element may also be telescopically received into the transceiver housing to miniinize size.
  • the 1/4 wave straight wire adds from 3-6 inches to the overall length of an operating transceiver.
  • the coil may be contained in a molded member protruding from the top of the transceiver housing.
  • a telescoping 1/4 wave straight wire may also pass through the coil, such that the wire and coil are both connected when the wire is extended, and just the coil is connected when the wire is telescoped down.
  • the transceiver overall length is typically increased by 3/4-1 inch by the coil.
  • PIFA Planar Inverted F Antenna
  • the plate is usually installed on the back panel or side panel of a transceiver and adds to the overall volume of the device.
  • An antenna including a planar dielectric material having a resonant structure on one major surface of the dielectric and a second ground plane structure disposed on the opposite major surface.
  • a conductive post may electrically couple (through the dielectric) the resonant structure to a coaxial feedline.
  • GPS antennas for portable or mobile equipment generally have the form of a microstrip patch or a quadrifilar helix.
  • the microstrip patch may be installed internally in some wireless communications devices, and size for 1575 MHz is typically reduced by dielectric loading, which also increases costs and weight.
  • the quadrifilar helix is of substantial size, and is mounted externally, where it is subject to damage. The manufacturing cost of either the patch or quadrifilar helix is greater than for an antenna according to the present invention.
  • the present invention replaces the external wire antenna of a wireless communication device with a printed dielectric substrate element which is disposed within the housing of a wireless device and closely-spaced to the printed wiring board (PWB) and antenna feedpoint of the wireless device. Electrical connection to the wireless device's PWB may be achieved through automated production equipment, resulting in cost effective assembly and production. Electrical performance of the internal (embedded) antenna in wireless systems is nominally equal to that of a conventional wire antenna.
  • SAR specific absorption rate
  • the resonator devices may exhibit resonant frequency ranges within the GPS, 860-990 Mhz, and 1710-1880 Mhz frequency ranges.
  • the resonator devices may operate at the GPS and a single band, such as 860-990 MHz or 1710-1880 MHz ranges.
  • the common second conductor may be supplied by the PWB of a wireless communication device such as a cell phone.
  • the GPS and wireless band resonators may be formed as printed circuits on a dielectric substrate using known circuit board fabrication processes and techniques, resulting in a low cost antenna suitable for high volume manirfacturing.
  • the present invention provides an antenna assembly including a first conductive trace element disposed upon the resonator element.
  • the resonant frequency range of the trace may be selected to exhibit 1/4 wave resonance.
  • the first printed circuit element is rectangular having a thickness in the range .010-.125 inches.
  • the conductive trace may be printed on any number of conventional dielectric materials having a low to moderate dielectric loss such as plastics and fiberglass.
  • the compact size of the resonator element may conform to available volume in the housing of a wireless transceiver such as a cellular telephone.
  • the antenna assembly may be excited or fed with 50 ohm impedance, which is a known convenient irnpedance level found at the receiver input transmitter output of a typical wireless transceiver.
  • the combined antenna system allows a GPS-based mobile station locating system to be incorporated with wireless devices such as cell phones.
  • the non-GPS portion of the antenna system may be configured to operate over cell phone bands of interest, such as 824-894 MHz/1850-1990 MHz or 880-960 MHz/1750-1880 MHz.
  • FIG. 1 illustrates a perspective view of a wireless communications device utilizing an antenna assembly according to the present invention
  • FIG. 2. is a first side elevational view of the resonator element of the antenna assembly of FIG. 1;
  • FIG. 3 is a second side elevational view of the resonator element of the antenna assembly of FIG. l;
  • FIG. 4 illustrates a perspective view of a wireless communications device utilizing another embodiment of an antenna assembly according to the present invention
  • FIG. 5 illustrates a side elevational view of a multiple-band resonator element according to the present invention.
  • FIG. 6 illustrates yet another view of a wireless communications device utilizing an antenna assembly according to the present invention.
  • FIG. 1 illustrates an antenna assembly 12 being disposed within a wireless communications device 10, such as a cellular telephone or PDA device.
  • the antenna assembly 12 includes a resonator element 14 having a pair of opposed surfaces 16, 18 and a ground plane element 20.
  • the ground plane element 20 may be the internal ground plane of a printed wiring board (PWB) of the communications device 10.
  • PWB printed wiring board
  • Ground plane element 20 includes a dimension of approximately V* wavelength or greater.
  • the antenna assembly 12 can be implemented to transmit and receive on desired frequencies, including analog or digital U.S. or European cell phone bands, PCS cell phone bands, 2.4 GHz BLUETOOTHTM bands, or other frequency bands as would be obvious to one skilled in the art.
  • Wireless communication device 10 contains electrical apparatus, such as a receiver and/or transmitter, herein referred for convenience together as a transceiver component 24.
  • the resonator element 14 may be disposed in substantially perpendicular relationship to the ground plane element 20.
  • a first conductor trace 26 is disposed upon a surface 16 of the resonator element 14, and second conductor traces 28a,b,c are disposed upon the opposite surface 18 of the resonator element 14.
  • the lower edge of each of the outer second conductor traces 28a,c is within approximately 1 -4 mm (vertical distance) from the ground plane 20.
  • the outer second conductor traces 28a,c are coupled to the signal ground proximate connection region 32.
  • the central second conductor trace 28b is operatively coupled to the transceiver signal input output componentry 24 via connection 30.
  • the first and second conductor traces 26, 28 of the antenna assembly 12 are disposed upon respective first and second surfaces 16, 18 of the resonator element 14, which may be a printed. , wiring board (PWB) 40 or similar materials capable of supporting the conductor traces. Both the first and second conductor traces 26, 28 may be disposed upon the substrate 40 using known circuit fabrication techniques, such as surface printing, photolithography, and etching processes.
  • the dimensions of the resonator element 14 may be varied to conform to a portion of the housing 22. Those skilled in the arts will appreciate that the design and selection of either the first or second planar elements 22,24 with reference to a particular wireless communication device may result in such complex shapes.
  • Resonator device 14 includes a substrate 40, such as a double sided printed wiring board having a relative dielectric constant in the range 2-10.
  • the substrate 40 may be of Duroid or glass fiber, or known dielectric printed circuit board material.
  • the substrate element 40 may be a dielectric PC board having a thickness between 0.005" to 0.125" thick.
  • a flexible PCB substrate may also be practicable.
  • FIG. 2 illustrates the resonator device 14 disposed in substantially perpendicular relationship to the ground plane element 20, such as the internal ground plane of the wireless communications device 10, and being fed directly from the signal lines on the PCB at connection regions 30 and 32.
  • An alternative antenna 12 feed approach is disclosed in FIG.
  • the resonator device 14 is coupled to a coax feedline 70 and a separate conductive plate element of approximately l A wavelength or greater dimension such as the ground plane 20 of the wireless device 10.
  • the center conductor of the coax line 70 is coupled at connection 30 to the central second conductor trace 28b, while the shield conductors of the coax line 70 are coupled to the second conductor traces 28a,c and the separate ground conductor element 20.
  • Conductor elements 26,28 of the resonator device 14 preferably have thicknesses in the range .0005-.01 inches.
  • the first conductor trace element 26 is an electrical quarter wave resonator for 1575 MHz.
  • the second conductor trace elements 28 form a feed network. Electrical connection between conductor trace elements 26 and central second conductor trace 28b is via capacitive coupling. Conductor element 28b is connected to the RF port of the wireless device at connection 30.
  • a second embodiment of the present invention is disclosed to include a second antenna 54 having a dielectric substrate 56 and disposed within a wireless communications device at an end opposite to the first resonator element 14.
  • the antenna assembly 54 is likewise incorporated within the handset of a communications device 10.
  • the second printed antenna 54 may include a single- or multiple-band wave resonator disposed relative to the ground plane 20 at an angle of 0-90 degrees.
  • the ground plane 20 is preferably the ground traces of the PWB of a wireless commimications device 10.
  • the second resonator element 54 may include a multiple-band resonator as disclosed in the assignees's U.S. Patent Application Serial No.
  • FIG. 5 depicts a tri-band antenna assembly 54 functioning across a cellular band (880 - 960 MHz.), a PCS band (1710 - 1880 MHz.) and the BLUETOOTHTM band (2.4 - 2.5 GHz).
  • Cellular and PCS band operation is effected through first conductor trace 140.
  • BLUETOOTHTM band operation is effected through conductor trace 142.
  • FIG. 5 illustrates an alternative feed approach, wherein the antenna assembly 54 is fed via coax signal lines 70.
  • the conductor trace 140 is coupled to the shield conductor of the coax 70 at region 144 and to the separate conductive panel 20.
  • Center conductor of coax 70 (to signal generating circuitry 24) is coupled to the antenna element 54 via feedpoint 146.
  • Conductor trace 142 is coupled to the shield conductor of the other coax 70 at region 148 and to the separate conductive panel 20.
  • the separate conductive panel 20 may be the internal ground plane of the printed wiring board of the wireless device.
  • Conductor trace 142 is also coupled to the center conductor of coax 70 at feedpoint 150.
  • FIG. 6 illustrates a perspective view of a third embodiment of a GPS and wireless frequency band antenna 14, 54.
  • a GPS quarter wave resonator 14 is fed by microstrip transmission line 60 disposed upon a dielectric substrate element 62 opposite a ground plane 64.
  • a single or multiband quarter wave resonator 54 for a wireless communications band or bands may be utilized on dielectric substrate 56.
  • the dielectric substrates 40, 56, 62 may be mechanically connected for structural integrity.

Abstract

Un ensemble d'antenne à résonateur quart d'onde monobande ou multibande (12) pour un dispositif de communications (10) incluant un élément résonateur (14) servant d'élément substrat, sur lequel est disposée au moins une paire d'éléments de trace électro-conductrice (26, 28). Ces éléments de trace électro-conductrice (26, 28) sont disposés sur les côtés opposés de l'élément de substrat (16, 18) et sont fonctionnellement couplés au dispositif de communication. L'ensemble d'antenne (12) comprend également un élément électro-conducteur distinct (20) faisant environ 1/4 d'onde ou plus, qui peut être définie comme le plan de sol de la carte de câblage imprimé interne du dispositif de communications (10).
PCT/US2000/027626 1999-10-06 2000-10-05 Resonateur quart d'onde monobande et multibande WO2001026181A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15794599P 1999-10-06 1999-10-06
US60/157,945 1999-10-06

Publications (1)

Publication Number Publication Date
WO2001026181A1 true WO2001026181A1 (fr) 2001-04-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/027626 WO2001026181A1 (fr) 1999-10-06 2000-10-05 Resonateur quart d'onde monobande et multibande

Country Status (1)

Country Link
WO (1) WO2001026181A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375893A (en) * 2000-12-04 2002-11-27 Nec Corp Antenna with ground plane
WO2002101875A1 (fr) * 2001-06-08 2002-12-19 Amc Centurion Ab Dispositif de radiocommunication portable et systeme antenne destine a un dispositif de radiocommunication portable
EP1298760A1 (fr) * 2001-09-29 2003-04-02 Philips Corporate Intellectual Property GmbH Antenne directionnelle miniaturisée
FR2849288A1 (fr) * 2002-12-23 2004-06-25 Socapex Amphenol Une antenne de faible volume, notamment pour radiotelephones portatifs
EP1881559A1 (fr) * 2005-05-31 2008-01-23 Research In Motion Limited Dispositif de communications mobile sans fil comprenant une antenne de système de positionnement par satellite et élément directeur électriquement conducteur correspondant
US7705776B2 (en) 2005-05-31 2010-04-27 Research In Motion Limited Mobile wireless communications device comprising a satellite positioning system antenna and electrically conductive director element therefor
US7903034B2 (en) 2005-09-19 2011-03-08 Fractus, S.A. Antenna set, portable wireless device, and use of a conductive element for tuning the ground-plane of the antenna set

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686536A (en) * 1985-08-15 1987-08-11 Canadian Marconi Company Crossed-drooping dipole antenna
US5798737A (en) * 1995-09-05 1998-08-25 Murata Mfg. Co., Ltd. Chip antenna
US6107967A (en) * 1998-07-28 2000-08-22 Wireless Access, Inc. Billboard antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686536A (en) * 1985-08-15 1987-08-11 Canadian Marconi Company Crossed-drooping dipole antenna
US5798737A (en) * 1995-09-05 1998-08-25 Murata Mfg. Co., Ltd. Chip antenna
US6107967A (en) * 1998-07-28 2000-08-22 Wireless Access, Inc. Billboard antenna

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2375893B (en) * 2000-12-04 2005-02-02 Nec Corp Wireless communication device with improved antenna structure
US6990363B2 (en) 2000-12-04 2006-01-24 Nec Corporation Wireless communication device with an improved antenna structure
GB2375893A (en) * 2000-12-04 2002-11-27 Nec Corp Antenna with ground plane
WO2002101875A1 (fr) * 2001-06-08 2002-12-19 Amc Centurion Ab Dispositif de radiocommunication portable et systeme antenne destine a un dispositif de radiocommunication portable
EP1298760A1 (fr) * 2001-09-29 2003-04-02 Philips Corporate Intellectual Property GmbH Antenne directionnelle miniaturisée
US6927731B2 (en) 2002-12-23 2005-08-09 Amphenol Socapex Antenna of small volume for a portable radio appliance
WO2004059788A1 (fr) * 2002-12-23 2004-07-15 Amphenol Socapex Une antenne de faible volume notamment pour radiotelephones portatifs
FR2849288A1 (fr) * 2002-12-23 2004-06-25 Socapex Amphenol Une antenne de faible volume, notamment pour radiotelephones portatifs
EP1881559A1 (fr) * 2005-05-31 2008-01-23 Research In Motion Limited Dispositif de communications mobile sans fil comprenant une antenne de système de positionnement par satellite et élément directeur électriquement conducteur correspondant
EP2131447A1 (fr) * 2005-05-31 2009-12-09 Research in Motion Dispositif de communication mobile sans fil comprenant une antenne GPS et des directeurs de rayonnement conductives
US7705776B2 (en) 2005-05-31 2010-04-27 Research In Motion Limited Mobile wireless communications device comprising a satellite positioning system antenna and electrically conductive director element therefor
US8212721B2 (en) 2005-05-31 2012-07-03 Research In Motion Limited Mobile wireless communications device comprising a satellite positioning system antenna and electrically conductive director element therefor
US8576119B2 (en) 2005-05-31 2013-11-05 Blackberry Limited Mobile wireless communications device comprising a satellite positioning system antenna and electrically conductive director element therefor
US7903034B2 (en) 2005-09-19 2011-03-08 Fractus, S.A. Antenna set, portable wireless device, and use of a conductive element for tuning the ground-plane of the antenna set
US8138981B2 (en) 2005-09-19 2012-03-20 Fractus, S.A. Antenna set, portable wireless device, and use of a conductive element for tuning the ground-plane of the antenna set

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