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Method for creating a slot-line on a multilayer substrate and multilayer printed circuit comprising at least one slot-line realized according to said method and used as an isolating slot or antenna

A printed circuit and isolation slot technology, which is applied in the directions of printed circuit components, secondary processing of printed circuits, independent non-interacting antenna combinations, etc., and can solve the problem of increasing the number of antennas

Inactive Publication Date: 2015-02-25
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using a MIMO circuit usually results in an increased number of antennas implemented for the same board

Method used

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  • Method for creating a slot-line on a multilayer substrate and multilayer printed circuit comprising at least one slot-line realized according to said method and used as an isolating slot or antenna
  • Method for creating a slot-line on a multilayer substrate and multilayer printed circuit comprising at least one slot-line realized according to said method and used as an isolating slot or antenna
  • Method for creating a slot-line on a multilayer substrate and multilayer printed circuit comprising at least one slot-line realized according to said method and used as an isolating slot or antenna

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Embodiment Construction

[0031] Firstly, the method for realizing isolation grooves on a multilayer printed circuit board according to the present invention will be described with reference to FIGS. 1 to 5 .

[0032] In this case, the printed circuit is realized by using a substrate known as FR4 (with a thickness of 1 mm).

[0033] Such as Figure 1A As shown, a short-circuit groove line 2 including an excitation point 3 is etched on the edge of the substrate 1,

[0034] According to the invention, the slot line 2 has an electrical length of less than 90°, preferably an electrical length chosen equal to 45°. In this particular embodiment, the length of the slot line is divided in two by folding the slot over the slot itself, as explained in more detail below. However, other electrical lengths may be chosen depending on the results to be obtained or the constraints of achieving the panel.

[0035] Such as Figure 1A The slot lines shown were simulated by using the HFSS 3D EM simulator. For the simul...

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Abstract

The present invention relates to a method for realizing a short-circuited slot-line on a multilayer substrate comprising at least a first conductive layer, a dielectric layer and a second conductive layer, the method comprising the following steps: - etching in the first conductive layer a slot-line (2) having an electrical length L, - etching in the first conductive layer, around the slot-line, a first portion (5a) of a first band having an electrical length L1 <= L, - etching in the first conductive layer, around the slot-line, a second portion (5b) of said first band, having an electrical length L2 <= L, - etching in the second conductive layer, a second band (7) in the form of a loop having an electrical length L3, - one end (8a) of the second band being connected to the first part of the first band and the other end (8b) of the second band being connected to the second part of the first band so as to form a conductive loop. The method is used notably to realize isolating slot-lines and slot-antennae.

Description

technical field [0001] The present invention relates generally to printed circuit boards for wireless systems. More specifically, it relates to a method for realizing slotlines on a multilayer substrate and a multilayer printed circuit comprising at least one slotline realized according to said method, which can be used in particular as isolation grooves or slots slit antenna. Background technique [0002] In the field of wireless communication, MIMO (Multiple Input Multiple Output) circuits are increasingly used to increase the capacity of transmission paths and improve the operation of the overall system. Using MIMO circuits generally results in an increased number of antennas implemented for the same board. On the other hand, antennas are nowadays printed directly on PCBs (Printed Circuit Boards) for the convenience of integrated circuits. However, by applying the laws of physics, the length of the antenna and the length of the isolation elements depend on the waveleng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/52H01Q13/08
CPCH01Q21/28H01Q9/42H01P3/023H01Q1/38H01Q13/106H05K1/0298H05K3/22H01Q1/521
Inventor D.洛海因唐P.米纳德J-L.罗伯特
Owner THOMSON LICENSING SA
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