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System of two antennas on a support

A support, dual-antenna technology, applied in the direction of antenna, independent antenna unit combination, antenna coupling, etc., can solve the problem of insufficient antenna isolation

Inactive Publication Date: 2010-09-29
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Now, when trying to bring the antennas closer together, the isolation between the antennas of the transmit / receive system becomes insufficient

Method used

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  • System of two antennas on a support
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Embodiment Construction

[0027] figure 1 Indicates a dual-band transmission / reception system formed on one substrate. The system preferably includes a first dual-band antenna A1 with two ports and a second dual-band antenna A2, the first dual-band antenna A1 is capable of transmitting signals in a first frequency band of the 2.4 GHz frequency band at the first port 1, and at the second Port 2 transmits signals in the second frequency band of the 5GHz frequency band, the second dual-band antenna A2 can transmit signals in the first frequency band of the 2.4GHz frequency band in the third port 3, and transmit signals in the second frequency band of the 5GHz frequency band in the fourth port 4 .

[0028] The first antenna A1 corresponds to the first microstrip excitation line at the center frequency of the first frequency band, and corresponds to the second microstrip excitation line at the center frequency of the second frequency band, the first and second microstrip excitation lines are etched in one...

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Abstract

The invention concerns a system of 2 antennas on the same support. Each antenna is connected to a first port for the emission / reception in a first frequency band, and to a second port for the emission / reception in a second frequency band. The invention consists in a specific dimensioning of the support, such that the difference L1-L2 of the perimetric lengths separating the median points is a function of the half wavelength [lambda] / 2 modulo k[lambda], k positive integer, where [lambda] is the wavelength corresponding to a working frequency fr.

Description

technical field [0001] The invention relates to a system with two longitudinal radiating antennas located on the same support. Background technique [0002] The present invention is within the framework of the development of WIFI ports currently being developed towards dual band 2.4GHz (standard 802.11b / g) and 5GHz (standard 802.11a) systems. [0003] For indoor wireless communication, multipath phenomenon is extremely unfavorable. The diversity technique implemented in WIFI devices consists in switching between the two receive antennas in a preferential manner. In the case of space diversity, the antennas are separated by a certain distance. In the case of polarization diversity, the antennas are vertically polarized, and in the case of radiation diversity, the antennas have complementary radiation patterns. By means of these diversity measures, the two antennas are decorrelated. [0004] Therefore, a dual-band wireless system (802.11a / b / g) utilizing diversity is realiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52H01Q21/28H01Q5/10
CPCH01Q1/521H01Q9/0421H01Q9/40H01Q13/10H01Q21/061H01Q21/28H01Q21/30
Inventor 菲利普·米纳尔让-伊夫·勒纳乌尔菲利普·山姆贝林让-卢克·罗伯特
Owner THOMSON LICENSING SA