Unlock instant, AI-driven research and patent intelligence for your innovation.

Integrated multi-frequency antenna for mobile telephone

A multi-frequency antenna, antenna technology, applied in the direction of electrical short antenna, antenna, resonant antenna, etc.

Inactive Publication Date: 2009-11-25
APPLE INC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] A problem that arises with this antenna is that it is tuned to each resonant frequency because the position of the slot 200 in the radiating element 10, the length of the branch that constitutes the slot 200 and its width this width determines its resonant frequency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Integrated multi-frequency antenna for mobile telephone
  • Integrated multi-frequency antenna for mobile telephone
  • Integrated multi-frequency antenna for mobile telephone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Figure 2a-2c The antenna shown in basically comprises a conducting plane radiating element 10 mounted parallel to a ground plane (not shown) also conducting and at a distance therefrom, the distance being determined in particular according to the bandwidth required for each resonant frequency . . A dielectric is arranged between the radiating element 10 and the ground plane.

[0033] The radiating element 10 is substantially rectangular in the illustrated embodiment. They are separated by slots 20 comprising an electrically insulating material (there is no conductive material constituting the emitting element 10 in the slot). The slot 20 comprises a shorter portion 20a which is substantially perpendicular to an edge 10a of the radiating element 10 and at which one end is enlarged. It also comprises a longer portion 20b substantially parallel to the edge 10a of the reflective element 10 and connected to the other end of the shorter portion 20a forming an elbow 20c. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a PIFA-type multi-frequency antenna comprising a radiant element (10) which is placed remotely from a ground plane. The radiant element (10) comprises at least one connection to the aforementioned ground plane (32), a supply point (31) and at least one slit (20, etc.). One end of the slit is disposed on one edge (10a) of the radiant element (10) while the other end thereof is disposed inside the radiant element, said slit being shaped to define a convex area (11) on the radiant element (10). In this way, the antenna forms the centre of several resonant frequencies. The invention is characterised in that each slit (20) comprises at least one projection (40, , 50, etc.).

Description

technical field [0001] The invention relates to an integrated multi-frequency antenna for a car phone. Background of the invention [0002] Antennas of this type are described in a paper entitled "Dual-Frequency Planar Inverted-FAntenna" by Zi Dong Liu et al., IEEE Proceedings, Vol. 45, No. 10, Oct. 1997, on Antennas and Propagation. Figure 1a An antenna of this type shown in , comprises a conductive planar radiating element 100 arranged at a distance d from a ground plane M which is also conductive and parallel to each other. The radiating element 100 is divided by a slot 200 into two distinct areas 101 and 102, each of which is energized by a supply pin 101a and 102a passing through the ground plane M. In addition, each region 101 , 102 of the radiation element 100 is connected to the ground plane M through a conductive pin 101 b , 102 b , which is referred to as a ground pin hereinafter. [0003] The resonant mode of this antenna is a quarter wavelength mode. Therefore...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/24H01Q5/00H01Q9/04H01Q5/371
CPCH01Q9/0421H01Q5/371H01Q1/243H01Q9/0442H01Q5/0058
Inventor 克里斯蒂安·勒雷
Owner APPLE INC