GB2357904A

GB2357904A - Antenna

Info

Publication number: GB2357904A
Application number: GB9930766A
Authority: GB
Inventors: Daniel Chang; Chi Ming Chiang
Original assignee: Auden Techno Corp
Current assignee: Auden Techno Corp
Priority date: 1999-12-30
Filing date: 1999-12-30
Publication date: 2001-07-04
Anticipated expiration: 2019-12-30
Also published as: GB9930766D0; GB2357904B

Abstract

An antenna includes a helix 6, 8 having one end for attached to a mobile telephone or the like. The other end of the helix extends 7 inward of the helix. The antenna is attached using a base 10 and a coupler 11. A protective cover 9 may be placed over the helix.

Description

2357904 ANTENNA The invention relates to an antenna.

FIGS. 9 and 10 disclose a typical antenna which comprises a helical spring 30 engaged on a curved panel 31 and secured on a base 32, and a cover 33 engaged on the helical spring 30 and the curved panel 31. This kind of antenna may be used and worked with one and only one particular frequency. FIGS. 11 and 12 disclose another typical antenna which comprises a panel 4 formed from a continuous strip and engaged onto a base member 5. This kind of antenna may be used and worked with one and only one particular frequency. In addition. this kind of antenna should be manufactured by high skilled persons and with precision machines.

is it is accordingly an object of the present invention to provide an antenna which may be used with a number of frequencies and which may be easily manufactured.

According to the present invention there is provided an antenna comprising a helical body including first end for attaching onto an object, and including second end, wherein the helical body includes an extension extended from the second end of the helical body and extended inward.of the helical body.

The antenna 'may further include a coupler coupled to the first end of the helical body for attaching the helical body onto the object, and may further include a 2 base coupled between the first end of the helical bo y and the coupler. A cover may further be provided a d i en,a-a-ed onto the helical body for shielding the hel c 1 body.

In the drawings:

FIG. 1 is a perspective view of an antenna; FIG. 2 is an exploded view of the antenna; FIG. 3 is a perspective view of a spring memb( r for the antenna; FIG. 4 is a top view of the spring member; FIG. 5 is a bottom view of the spring member; FIG. 6 is a cross sectional view taken along lints 6-6 of FIG. 3; FIG. 7 is a schematic view illustrating the is application of the antenna for a portable phone; FIG. 8 is a chart illustrating the application c f the antenna; FIG. 9 is a perspective view illustrating a typical antenna; FIG. 10 is an exploded view illustrating t typical antenna as shown in FIG. 9; FIG. 11 is a plane view illustrating a conductive member for another typical antenna; and FIG. 12 is a perspective view illustrating the typical antenna having the conductive member as shom in FIG. 11.

Referring to FIGS. 1-6, an antenna comprises a 3 coupler 11 having a recess 12 formed therein for receivin,g a base 10. A spring member 6 includes a helical body 8 havin.g a lower portion engaged onto the base 10 by adhesive materials or by a force-fitted en.-a,-,,,ement, and havin.- an extension 7 extended downward from the upper end 81 of the helical body 8 and extended inward of the helical body 8. A cover 9, preferably a transparent cover 9, is then en,-,,a,-,ed onto the base 10 or the coupler 11 for shielding and protectina. the spring member 6 and the base 10 and/or the coupler 11.

Referrin.a. next to FIG. 7, in operation, the coupler 11 of the antenna may be attached onto an object, such as a portable phone 13 or. the other is electrical facilities by the typical methods or mechanisms.

For resonance, the inductive impedance ZL Plus the capacitance impedance ZC should equals to zero. the equations for the frequency are as follows:

Z=jwL, j=V--1-, W= 2)rf, Z L jWC-, jwL+ =o, ZL+ZC = 0 jWC -wL+ 1 =0 wL- W 2_ WC WC LC f U 2 1 - 1 Y -LC 4 As shown in FIG. 8, when testing the antenna, 1X frequencies 1, 2, 3, 4, 5, 6 may be obtained and conducted by the present antenna. The first frequency is 890 MHz' the second frequency is 960 MHz' the third frequency is 1710 MHZ1 the fourth frequency is 1880 MHZ9 the fifth frequency is 1850 MHz, and the sixth frequency is 1990 MH The present antenna may thus be Z1 used for receiving and for emitting more and various kinds of frequencies as compared with the typic 1 antenna.

It is to be noted that, as shown in FIGS. 1, 2 and 7, for allowing the antenna to be attached onto the electrical facilities. such as the video or rad o appliances or the portable phone, the spring member 6 is may be attached onto the base 10 and then onto the coupler 11. The coupler 11 may be used for attachii01 the spring member 6 onto the electrical facilities. However, the most important characteristic of the invention is to provide an extension 7 extended from 20 one of the end portions of the helical spring body 8 which may also be attached or coupled to the electric facilities directly without the coupler 11 and/or t e base 10.

Claims

CLAIMS: 1. An antenna comprising a helical body including first end for

attaching onto an object, and including second end, characterized in that: 05 the helical body includes an extension extended from the second end of the helical body and extended inward of the helical body.
2. An antenna as claimed in claim 1 further comprising a coupler coupled to the first end of the helical body for attaching onto the object.
3. A mobile phone having an antenna substantially as hereinbefore described with reference to and as shown in Figures 1 to 8 of the accompanying drawings.

3. An antenna as claimed in claim 1 further comprising a base coupled to the f irst end of the helical body.

4. An antenna as claimed in claim 3 further is comprising a coupler coupled to the base for attaching onto the object. 5. An antenna as claimed in claim 1 further comprising a cover engaged onto the helical body for shielding the helical body. 20 6. An antenna substantially as herein described with reference to f igures 1- 8 of the accompanying drawings.

6 Amendments to the claims have been filed as follows Claims:- 1. An antenna comprising a spring including a helical bod having a lower end and an upper end, the lower end of the helic 1 body being coupled to a base andlor a coupler for attachment of th antenna to a mobile phone or other electrical facility, and the sprin also including an extension extending downwardly from the uppe end of the helical body, said extension being contained within th helical body and arranged for direct attachment to the electrica facility independently of the base andlor coupler.

2. A mobile phone having an antenna as claimed in Claim 1.