WO2003067704A1 - An antenna sub-assembly and a method of manufacturing the same - Google Patents

An antenna sub-assembly and a method of manufacturing the same Download PDF

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Publication number
WO2003067704A1
WO2003067704A1 PCT/GB2003/000563 GB0300563W WO03067704A1 WO 2003067704 A1 WO2003067704 A1 WO 2003067704A1 GB 0300563 W GB0300563 W GB 0300563W WO 03067704 A1 WO03067704 A1 WO 03067704A1
Authority
WO
WIPO (PCT)
Prior art keywords
core unit
channels
unit
predetermined surface
channel
Prior art date
Application number
PCT/GB2003/000563
Other languages
French (fr)
Inventor
David Ganeshmoorthy
Richard Ganeshmoorthy
Kandiah Ganeshmoorthy
Original Assignee
David Ganeshmoorthy
Richard Ganeshmoorthy
Kandiah Ganeshmoorthy
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 David Ganeshmoorthy, Richard Ganeshmoorthy, Kandiah Ganeshmoorthy filed Critical David Ganeshmoorthy
Priority to AU2003209972A priority Critical patent/AU2003209972A1/en
Publication of WO2003067704A1 publication Critical patent/WO2003067704A1/en

Links

Classifications

    • 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
    • H01Q1/36—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3456—Antennas, e.g. radomes

Definitions

  • This invention relates to a method of manufacturing and product of the method. It is particularly concerned with a the manufacture of antenna.
  • the design of such antenna has involved the provision of a number of components which are subsequently assembled as a unit for subsequent addition to form a complete device such as a mobile phone.
  • a method of manufacturing an antenna subassembly comprising the steps of: manufacturing a core unit of a plastics material in a mould the core unit having a channel or series of channels which channel or channels bounding predetermined surface areas of the core unit; injecting or otherwise inserting into the channel or channels a masking material to form a combined unit comprising core unit and masking material; etching the predetermined surface area to provide a keyed surface to provide for subsequent deposition of material; and subjecting the combined unit to a deposition process whereby the predetermined surface areas of the core unit are coated with an inherently conducting material or a material which can subsequently be rendered conducting; and if required subjecting the coated material to an activation process to render it conducting process.
  • an antenna sub-assembly comprising: a core unit of plastics material, the unit being of substantially cylindrical form, with a longitudinal axis; channels in the core unit serving to bound a predetermined surface area or areas of the core unit' masking material occupying the channel or channels so that the masking material provides boundaries to the or each predetermined surface area; and a deposited layer of conducting material on the predetermined surface area or areas of the core unit; the core unit, masking material and deposited layer forming an antenna for operation at a pre-determined frequency or range of frequencies the core unit including an input conductor whereby the deposited layer can be coupled to a radio circuit.
  • Figure 1A - C shows sectional elevation of a core unit moulding
  • Figure 2 A - C shows the core unit of Figure 1 having had injected into it masking material
  • Figure 3 shows a number of sections of the core unit shown in Figure 2.
  • Figure 1A - C variously shows a section of core unit 11, which is of plastics material.
  • the unit 11 has a screwed lower end 12 by means of which the completed antenna is mounted in a working unit such as a mobile phone.
  • the unit 11 has moulded into it a series of channels, typically channels C, Cl, C2 which serve to provide boundaries to surface areas, for example areas Al, A2, A3, which are of predetermined shape and which form the eventual conducting working region of the antenna. Consequently where required the areas are linked to one another to obtain the required electrical configuration.
  • channels C, Cl, C2 which serve to provide boundaries to surface areas, for example areas Al, A2, A3, which are of predetermined shape and which form the eventual conducting working region of the antenna. Consequently where required the areas are linked to one another to obtain the required electrical configuration.
  • Figure 2 shows the unit 11 of Figure 1 following an injection process in the course of which masking material M is injected into the channels C, Cl, C2. Following the injection process described in connection with Figure 2 the surface of the surface areas Al, A2, A3 are subjected to an etching process to optimise a subsequent deposition process (e.g. electroplating) onto the predetermined surface areas Al - 3.
  • a subsequent deposition process e.g. electroplating
  • Figure 3 shows cross sections 1 - 8 along axis A of the unit 11 ( Figure 2C) following the injection process described above in connection with Figure2. It shows those regions of the core member 11 which are either masked by material M or open to receive a deposition forming the eventual conducting area of the antenna.
  • the configuration and dimensions of the predetermined areas Al, A2, A3 etc depend on the operating characteristics required in the finished antenna. By using masking material in this way any configuration of predetermined area or areas can be readily achieved.
  • the lower part of the unit 11 including the screwed section 12 is readily and economically coated with conducting material to provide for good conducting contact between the unit 11 and a socket into which it is screwed.
  • Table 1 shows the characteristics of various materials which can be deposited on a core unit to produce various characteristics.
  • Various deposition processes can be used including electroless plating and electroplating.
  • material can be deposited which requires a further treatment to optimise its characteristics in an operational state.
  • Table 2 shows a number of stages for undertaking various plating processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Aerials (AREA)

Abstract

A method of manufacturing an antenna sub-assembly comprising the steps of: manufacturing a core unit (11) of a plastics material in a mould the core unit (11) having a channel or series of channels (C1, C2, C3)which channel or channels bounding predetermined surface areas (A1, A2, A3) of the core unit; injecting or otherwise inserting into the channel or channels a masking material (M) to form a combined unit comprising core unit (11) and masking material (M); etching the predetermined surface area to provide a keyed surface to provide for subsequent deposition of material; and subjecting the combined unit to a deposition process whereby the predetermined surface areas of the core unit are coated with an inherently conducting material or a material which can subsequently be rendered conducting; and, if required, subjecting the coated material to an activation process to render it conducting.

Description

AN ANTENNA SUB-ASSEMBLY AND A METHOD OF MANUFACTURING THE SAME
TECHNICAL FIELD
This invention relates to a method of manufacturing and product of the method. It is particularly concerned with a the manufacture of antenna.
BACKGROUND ART
Antenna for mobile devices, particularly phones, involve the production in large numbers of a device manufactured to close tolerances. Heretofore the design of such antenna has involved the provision of a number of components which are subsequently assembled as a unit for subsequent addition to form a complete device such as a mobile phone.
DISCLOSURE OF INVENTION
According to a first aspect of the present invention there is provided a method of manufacturing an antenna subassembly comprising the steps of: manufacturing a core unit of a plastics material in a mould the core unit having a channel or series of channels which channel or channels bounding predetermined surface areas of the core unit; injecting or otherwise inserting into the channel or channels a masking material to form a combined unit comprising core unit and masking material; etching the predetermined surface area to provide a keyed surface to provide for subsequent deposition of material; and subjecting the combined unit to a deposition process whereby the predetermined surface areas of the core unit are coated with an inherently conducting material or a material which can subsequently be rendered conducting; and if required subjecting the coated material to an activation process to render it conducting process.
According to a first preferred version of the first aspect of the present invention the subjecting step involves an inherently conducting material such as Nichem PF-500, Nichem 2700, nickel, chrome or gold. According to a second aspect of the present invention there is provided an antenna sub-assembly comprising: a core unit of plastics material, the unit being of substantially cylindrical form, with a longitudinal axis; channels in the core unit serving to bound a predetermined surface area or areas of the core unit' masking material occupying the channel or channels so that the masking material provides boundaries to the or each predetermined surface area; and a deposited layer of conducting material on the predetermined surface area or areas of the core unit; the core unit, masking material and deposited layer forming an antenna for operation at a pre-determined frequency or range of frequencies the core unit including an input conductor whereby the deposited layer can be coupled to a radio circuit.
BRIEF DESCRIPTION OF DRAWINGS
An exemplary embodiment of the invention will now be described with reference to the accompanying drawings of an antenna unit of which:
Figure 1A - C shows sectional elevation of a core unit moulding;
Figure 2 A - C shows the core unit of Figure 1 having had injected into it masking material; and
Figure 3 shows a number of sections of the core unit shown in Figure 2.
MODE FOR CARRYING OUT THE INVENTION
Figure 1A - C variously shows a section of core unit 11, which is of plastics material. The unit 11 has a screwed lower end 12 by means of which the completed antenna is mounted in a working unit such as a mobile phone.
The unit 11 has moulded into it a series of channels, typically channels C, Cl, C2 which serve to provide boundaries to surface areas, for example areas Al, A2, A3, which are of predetermined shape and which form the eventual conducting working region of the antenna. Consequently where required the areas are linked to one another to obtain the required electrical configuration.
Figure 2 shows the unit 11 of Figure 1 following an injection process in the course of which masking material M is injected into the channels C, Cl, C2. Following the injection process described in connection with Figure 2 the surface of the surface areas Al, A2, A3 are subjected to an etching process to optimise a subsequent deposition process (e.g. electroplating) onto the predetermined surface areas Al - 3.
Figure 3 shows cross sections 1 - 8 along axis A of the unit 11 (Figure 2C) following the injection process described above in connection with Figure2. It shows those regions of the core member 11 which are either masked by material M or open to receive a deposition forming the eventual conducting area of the antenna. The configuration and dimensions of the predetermined areas Al, A2, A3 etc depend on the operating characteristics required in the finished antenna. By using masking material in this way any configuration of predetermined area or areas can be readily achieved. Typically in the example described the lower part of the unit 11 including the screwed section 12 is readily and economically coated with conducting material to provide for good conducting contact between the unit 11 and a socket into which it is screwed.
Table 1 shows the characteristics of various materials which can be deposited on a core unit to produce various characteristics. Various deposition processes can be used including electroless plating and electroplating. In addition if necessary material can be deposited which requires a further treatment to optimise its characteristics in an operational state.
Table 2 shows a number of stages for undertaking various plating processes.
INDUSTRIAL APPLICABILITY
By means of the invention an efficient and economic design of antenna is achieved

Claims

1 A method of manufacturing an antenna sub-assembly characterised by the steps of: manufacturing a core unit of a plastics material in a mould the core unit having a channel or series of channels which channel or channels bounding predetermined surface areas of the core unit; injecting or otherwise inserting into the channel or channels a masking material to form a combined unit comprising core unit and masking material; etching the predetermined surface area to provide a keyed surface to provide for subsequent deposition of material; and subjecting the combined unit to a deposition process whereby the predetermined surface areas of the core unit are coated with an inherently conducting material or a material which can subsequently be rendered conducting; and, if required, subjecting the coated material to an activation process to render it conducting.
2 A method as claimed in Claim 1 characterised in that wherein the subjecting step involves an inherently conducting material such as Nichem PF-500, Nichem 2700, nickel, chrome or gold.
3 A antenna sub-assembly characterised by: a core unit of plastics material, the unit being of substantially cylindrical form, with a longitudinal axis; channels in the core unit serving to bound a predetermined surface area or areas of the core unit' masking material occupying the channel or channels so that the masking material provides boundaries to the or each predetermined surface area; and a deposited layer of conducting material on the predetermined surface area or areas of the core unit; the core unit, masking material and deposited layer forrning an antenna for operation at a pre-deterrnined frequency or range of frequencies the core unit including an input conductor whereby the deposited layer can be coupled to a radio circuit.
PCT/GB2003/000563 2002-02-08 2003-02-10 An antenna sub-assembly and a method of manufacturing the same WO2003067704A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003209972A AU2003209972A1 (en) 2002-02-08 2003-02-10 An antenna sub-assembly and a method of manufacturing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0203004.7 2002-02-08
GB0203004A GB2385202A (en) 2002-02-08 2002-02-08 Antenna with cylindrical core having channels filled with masking material

Publications (1)

Publication Number Publication Date
WO2003067704A1 true WO2003067704A1 (en) 2003-08-14

Family

ID=9930712

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000563 WO2003067704A1 (en) 2002-02-08 2003-02-10 An antenna sub-assembly and a method of manufacturing the same

Country Status (3)

Country Link
AU (1) AU2003209972A1 (en)
GB (1) GB2385202A (en)
WO (1) WO2003067704A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1251451A (en) * 1969-03-19 1971-10-27
EP0256428A2 (en) * 1986-08-15 1988-02-24 AMP-AKZO CORPORATION (a Delaware corp.) Molded metallized plastic articles and processes for making the same
US5407622A (en) * 1985-02-22 1995-04-18 Smith Corona Corporation Process for making metallized plastic articles
WO1999007032A1 (en) * 1997-07-31 1999-02-11 Siemens Aktiengesellschaft Process for manufacturing a helix antenna
GB2345022A (en) * 1998-12-23 2000-06-28 Nokia Mobile Phones Ltd Method for manufacturing an antenna body for a phone
GB2349598A (en) * 1999-01-22 2000-11-08 Finglas Technologies Ltd Moulded electrical components

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9417450D0 (en) * 1994-08-25 1994-10-19 Symmetricom Inc An antenna
JP2000091827A (en) * 1998-09-07 2000-03-31 Ace Technol Co Ltd Helical antenna for portable communication terminal equipment using ceramic dielectric and manufacture of the same
JP2000278020A (en) * 1999-03-29 2000-10-06 Yokowo Co Ltd Antenna element and its manufacture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1251451A (en) * 1969-03-19 1971-10-27
US5407622A (en) * 1985-02-22 1995-04-18 Smith Corona Corporation Process for making metallized plastic articles
EP0256428A2 (en) * 1986-08-15 1988-02-24 AMP-AKZO CORPORATION (a Delaware corp.) Molded metallized plastic articles and processes for making the same
WO1999007032A1 (en) * 1997-07-31 1999-02-11 Siemens Aktiengesellschaft Process for manufacturing a helix antenna
GB2345022A (en) * 1998-12-23 2000-06-28 Nokia Mobile Phones Ltd Method for manufacturing an antenna body for a phone
GB2349598A (en) * 1999-01-22 2000-11-08 Finglas Technologies Ltd Moulded electrical components

Also Published As

Publication number Publication date
GB0203004D0 (en) 2002-03-27
AU2003209972A1 (en) 2003-09-02
GB2385202A (en) 2003-08-13

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