GB2385202A - Antenna with cylindrical core having channels filled with masking material - Google Patents
Antenna with cylindrical core having channels filled with masking material Download PDFInfo
- Publication number
- GB2385202A GB2385202A GB0203004A GB0203004A GB2385202A GB 2385202 A GB2385202 A GB 2385202A GB 0203004 A GB0203004 A GB 0203004A GB 0203004 A GB0203004 A GB 0203004A GB 2385202 A GB2385202 A GB 2385202A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core unit
- channels
- predetermined surface
- unit
- antenna
- 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- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
- Details Of Aerials (AREA)
Abstract
A plastic cylindrical core 11 has moulded into it a series of channels C1,C2,C3 into which masking material M is injected. The channels form the boundaries of predetermined surface areas A1,A2,A3. These surface areas are first etched and then subjected to a deposition process (eg electroplating) thus forming a conducting area of the antenna. The deposited material may be inherently conductive material (eg gold, chrome, nickel, Nichem RTM), or a material which can subsequently be rendered conducting. The core 11 includes a threaded portion 12 by which the antenna may be mounted (eg onto a mobile phone).
Description
<Desc/Clms Page number 1>
METHOD OF MANUFACTURING AND PRODUCT OF THE METHOD This invention relates to a method of manufacturing and product of the method. It is particularly concerned with a the manufacture of antenna.
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.
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:
<Desc/Clms Page number 2>
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.
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.
Figure 1A-C variously show 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.
<Desc/Clms Page number 3>
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.
By means of the invention an efficient and economic design of antenna is achieved Table 1 show 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.
Claims (3)
- CLAIMS 1 A method of manufacturing an antenna sub-assembly 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.
- 2 A method as claimed in Claim 1 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 comprising 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.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0203004A GB2385202A (en) | 2002-02-08 | 2002-02-08 | Antenna with cylindrical core having channels filled with masking material |
AU2003209972A AU2003209972A1 (en) | 2002-02-08 | 2003-02-10 | An antenna sub-assembly and a method of manufacturing the same |
PCT/GB2003/000563 WO2003067704A1 (en) | 2002-02-08 | 2003-02-10 | An antenna sub-assembly and a method of manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0203004A GB2385202A (en) | 2002-02-08 | 2002-02-08 | Antenna with cylindrical core having channels filled with masking material |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0203004D0 GB0203004D0 (en) | 2002-03-27 |
GB2385202A true GB2385202A (en) | 2003-08-13 |
Family
ID=9930712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0203004A Withdrawn GB2385202A (en) | 2002-02-08 | 2002-02-08 | Antenna with cylindrical core having channels filled with masking material |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003209972A1 (en) |
GB (1) | GB2385202A (en) |
WO (1) | WO2003067704A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0986132A2 (en) * | 1998-09-07 | 2000-03-15 | Ace Technology | Helical antenna for portable phones and manufacturing method therefor |
JP2000278020A (en) * | 1999-03-29 | 2000-10-06 | Yokowo Co Ltd | Antenna element and its manufacture |
EP1081787A2 (en) * | 1994-08-25 | 2001-03-07 | Sarantel Limited | An antenna |
Family Cites Families (6)
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 |
IN167760B (en) * | 1986-08-15 | 1990-12-15 | Kollmorgen Tech Corp | |
WO1999007032A1 (en) * | 1997-07-31 | 1999-02-11 | Siemens Aktiengesellschaft | Process for manufacturing a helix antenna |
GB2345022B (en) * | 1998-12-23 | 2003-06-11 | 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 |
-
2002
- 2002-02-08 GB GB0203004A patent/GB2385202A/en not_active Withdrawn
-
2003
- 2003-02-10 AU AU2003209972A patent/AU2003209972A1/en not_active Abandoned
- 2003-02-10 WO PCT/GB2003/000563 patent/WO2003067704A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1081787A2 (en) * | 1994-08-25 | 2001-03-07 | Sarantel Limited | An antenna |
EP0986132A2 (en) * | 1998-09-07 | 2000-03-15 | Ace Technology | Helical antenna for portable phones and manufacturing method therefor |
JP2000278020A (en) * | 1999-03-29 | 2000-10-06 | Yokowo Co Ltd | Antenna element and its manufacture |
Also Published As
Publication number | Publication date |
---|---|
AU2003209972A1 (en) | 2003-09-02 |
GB0203004D0 (en) | 2002-03-27 |
WO2003067704A1 (en) | 2003-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |