GB2398170A - Surface mount antenna with metal clips - Google Patents
Surface mount antenna with metal clips Download PDFInfo
- Publication number
- GB2398170A GB2398170A GB0302470A GB0302470A GB2398170A GB 2398170 A GB2398170 A GB 2398170A GB 0302470 A GB0302470 A GB 0302470A GB 0302470 A GB0302470 A GB 0302470A GB 2398170 A GB2398170 A GB 2398170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- antenna
- clips
- metal clips
- surface mount
- printed
- 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- Withdrawn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
- H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
- H05K3/3426—Leaded components characterised by the leads
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Support Of Aerials (AREA)
Abstract
A surface mount antenna with metal clips for coupling to a printed circuit board 1 of a wireless device is presented. The antenna consists of a dielectric substrate 11 with at least one printed radiating element 10 and at least two metal clips 2a, 2b. The printed radiated element 10 is connected to the clips 2a, 2b to form a composite radiating structure. The clips 2a, 2b have four-fold function: to radiate electromagnetic waves as part of a composite radiating structure, to tune the antenna resonant frequency, to improve antenna input impedance match and bandwidth and to provide means of connecting the antenna to a printed circuit board.
Description
1 23981 70 *
SURFACE MOUNT ANTENNA WITH METAL CLIPS
This invention relates generally to a surface mount chip antenna for wireless communication devices such as personal digital assistants, mobile phones, wireless modems etc. More particularly, the present invention relates to a chip antenna that is mounted directly to the devices' printed circuit board (PCB) using at least two metal clips. The clips are also used as RF (Radio Frequency) tuning and radiating elements.
Antenna elements have been down-sized in order to meet the manufacturing and size constraints which accompany the current trend towards smaller radio units. Presently, chip antennas made of high- dielectric constant materials (Er >20) are used (see an overview given in K.L. Wong et al., "Dual-Band Plastic Chip Antenna for GSM/DCS Mobile Phones", Microwave and Optical Technology Letters, Vol. 33, No.S, June 5, 2002., pp. 330-332). These materials are usually ceramic-based and are hence expensive. Furthermore, tooling is required to manufacture these antennas, making the antenna design and development both expensive and long. If the antenna design has to be changed after the tooling has been commissioned the cost and the time-delay will further increase.
In order to overcome the above-mentioned drawbacks a new design of chip antennas is proposed that utilises standard printed techniques on inexpensive substrates (such as FR4) and at least two metal clips that provide the connection to the PCB. The clips also form part of radiating structure and are used as RF tuning elements.
A principal object of the present invention is to provide a surface mount antenna with metal clips for coupling to a printed circuit board of a wireless device.
It is a further object of the present invention to provide a surface mount antenna that is simple and easy to manufacture.
It is still further object of the present invention to provide a small and lightweight antenna that is easily assembled into a wireless device.
It is another object of this invention to provide a surface mount antenna with metal clips that are used as the RF tuning elements.
According to a broad aspect of the invention there is provided an antenna for coupling to a printed circuit board, the antenna comprising of a dielectric substrate, at least one printed metal radiating trace and at least two metal clips connected to the metal trace. The printed radiated element is electrically connected to the clips to form a composite radiating structure. The clips have four-fold function: to radiate electromagnetic waves as part of a composite radiating structure, to tune the antenna resonant frequency, to improve antenna input impedance match and bandwidth and to provide means of connecting the antenna to the printed circuit board.
These and other objectives, features and advantages of the present invention will be apparent to those skilled in the art.
A preferred embodiment of the invention will now be described with reference to the accompanying drawing in which: Figure l shows the antenna; Figure 2 shows a partial side view of the antenna mounted on a device PCB.
As shown in Figure l the chip antenna comprises of a PCB 1 with a dielectric substrate 11 such as FR4, ceramic loaded PTFE or other suitable material, a radiating trace 10 and two clips 2a and 2b. The clips 2a & 2b are attached to the dielectric substrate 11 and the radiating trace 10 by soldering 3a and 3b or other suitable means to provide both mechanical and electrical bond to the dielectric substrate 11. The clips 2a & 2b are made from tin plated brass or other suitable material. The clips 2a & 2b are shown aligned with the central axis of the PCB 1, however they may be placed offset from the central axis or elsewhere to improve stability of the device.
Figure 2 shows a side view of the antenna attached to a device PCB 5 by surface mount soldering 4 or other suitable means to the device PCB track 51.
The antenna resonant frequency can be tuned by changing the length of the clips 2a & 2b. The antenna input impedance and bandwidth can be changed by modifying the with of the clips 2a & 2b. The impedance and the bandwidth can be further changed by shaping the clips ends (e.g., by introducing V-shaped slots). Clips 2a & 2b do not have to be of the same shape and size.
Claims (3)
1. A surface mount antenna with at least two metal clips as provision for mounting onto a printed circuit board, said antenna comprising: a dielectric substrate, a printed trace, and at least two metal clips providing mechanical and electrical bond between the printed trace and the dielectric substrate.
2. An antenna according to claim 1 wherein the metal clips are used to tune the antenna resonant frequency.
3. An antenna according to claim 1 wherein the metal clips are used to improve the antenna input impedance match and bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0302470A GB2398170A (en) | 2003-02-04 | 2003-02-04 | Surface mount antenna with metal clips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0302470A GB2398170A (en) | 2003-02-04 | 2003-02-04 | Surface mount antenna with metal clips |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0302470D0 GB0302470D0 (en) | 2003-03-05 |
| GB2398170A true GB2398170A (en) | 2004-08-11 |
Family
ID=9952352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0302470A Withdrawn GB2398170A (en) | 2003-02-04 | 2003-02-04 | Surface mount antenna with metal clips |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2398170A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2571547A1 (en) * | 1984-10-05 | 1986-04-11 | Thomson Csf | Hybrid circuit which can be transferred to a support containing a high-density interconnection network |
| JPH02305208A (en) * | 1989-05-19 | 1990-12-18 | Fujitsu Ltd | Surface mount part |
| US5187455A (en) * | 1990-06-13 | 1993-02-16 | Murata Manufacturing Co., Ltd. | Delay line device with adjustable time delay |
| US6049262A (en) * | 1997-08-28 | 2000-04-11 | Emc Technology Llc | Surface mountable transmission line device |
| EP0993070A1 (en) * | 1998-09-30 | 2000-04-12 | Nec Corporation | Inverted-F antenna with switched impedance |
| GB2360398A (en) * | 2000-03-16 | 2001-09-19 | Nokia Mobile Phones Ltd | Antenna connector allowing releasable connection of an antenna to a PCB |
| WO2002027862A1 (en) * | 2000-09-27 | 2002-04-04 | Rangestar Wireless, Inc. | Omni directional antenna with multiple polarizations |
-
2003
- 2003-02-04 GB GB0302470A patent/GB2398170A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2571547A1 (en) * | 1984-10-05 | 1986-04-11 | Thomson Csf | Hybrid circuit which can be transferred to a support containing a high-density interconnection network |
| JPH02305208A (en) * | 1989-05-19 | 1990-12-18 | Fujitsu Ltd | Surface mount part |
| US5187455A (en) * | 1990-06-13 | 1993-02-16 | Murata Manufacturing Co., Ltd. | Delay line device with adjustable time delay |
| US6049262A (en) * | 1997-08-28 | 2000-04-11 | Emc Technology Llc | Surface mountable transmission line device |
| EP0993070A1 (en) * | 1998-09-30 | 2000-04-12 | Nec Corporation | Inverted-F antenna with switched impedance |
| GB2360398A (en) * | 2000-03-16 | 2001-09-19 | Nokia Mobile Phones Ltd | Antenna connector allowing releasable connection of an antenna to a PCB |
| WO2002027862A1 (en) * | 2000-09-27 | 2002-04-04 | Rangestar Wireless, Inc. | Omni directional antenna with multiple polarizations |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0302470D0 (en) | 2003-03-05 |
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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) |