EP2932555A1 - Structures de filtrage hyperfrequence - Google Patents
Structures de filtrage hyperfrequenceInfo
- Publication number
- EP2932555A1 EP2932555A1 EP13821661.9A EP13821661A EP2932555A1 EP 2932555 A1 EP2932555 A1 EP 2932555A1 EP 13821661 A EP13821661 A EP 13821661A EP 2932555 A1 EP2932555 A1 EP 2932555A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- ground planes
- microwave
- pillars
- mode
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
- H01P3/081—Microstriplines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
- H01P5/022—Transitions between lines of the same kind and shape, but with different dimensions
- H01P5/028—Transitions between lines of the same kind and shape, but with different dimensions between strip lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20363—Linear resonators
Definitions
- the present invention relates to a microwave filtering structure. More particularly, the invention is in the context of triplic structures.
- triplaques structures In the state of the art, there are so-called triplaques structures (or stripiines in English).
- the term "triplate structure” means a form of electromagnetic transmission medium which uses a flat metal strip disposed between two electrical insulators, also called dielectric, being metallized on their outer surface.
- These triplic structures have many advantages over microstrip structures (or microstrips in English).
- the so-called microstrip structure is understood to mean a type of electrical transmission line that can be manufactured using the standard manufacturing process of electronic cards, and which is used in microwave techniques.
- This microstrip structure consists of a conduction band separated from a ground plane by a dielectric layer.
- the advantage of the triplate structure with respect to a microstrip structure is, on the one hand, that the propagation takes place in the Transverse Electro Magnetic (TEM) mode.
- TEM Transverse Electro Magnetic
- the triplate structure has its own electromagnetic shielding and therefore does not radiate.
- such a triplate structure is able to be isolated and tested separately, then be integrated as easily as a CMS component on a microwave circuit board.
- the triplic structures are of smaller dimensions for a function equivalent to those of the microstrip structures.
- This distortion also occurs outside the bandwidth in the form of spurious responses, especially at frequencies above the center frequency of the filter, such as the high attenuated band.
- the synthesis of the bandpass filter can be verified using an electromagnetic simulator. It is found by means of the electromagnetic simulator that the observed distortion and spurious responses are due to the establishment of a TE10 guided propagation mode.
- the present invention aims to solve all the disadvantages of the state of the art.
- the invention proposes a new integrable filter structure whose frequency response is free of distortion and parasitic response over a wide frequency band and thus significantly improves the filter performance.
- the conductive layer being etched in the form of a filter, the upper and lower outer faces of the stack of the two dielectric layers being covered over most of their surface by a conducting plane constituting ground planes of the structure,
- ground planes being interconnected by a metallization of the periphery of the structure, except in the vicinity of the microwave access,
- an input transition device and an output transition device each allowing the transition from a microstrip mode to a stripline mode and vice versa, configured so that the geometry of the transition device is optimized to minimize stationary wave rates at the filter ports, and also minimize the excitation and coupling of the TE10 mode,
- the invention includes any of the following features:
- the transition devices each comprise:
- a metallized beach situated on its lower face and on the small side of the filter
- transition devices allow an assembly of the structure according to the invention, by soldering on a printed circuit microstrip microwave type
- the pillars are made in the form of metallized vias crossing the two dielectric layers;
- the pillars are solid metal rods.
- the invention also relates to a printed circuit comprising a set of active and / or passive components, characterized in that it comprises one or more structure (s) according to any one of the preceding characteristics.
- FIG. 3 Detailed view of the stripline / microstrip transition, according to one embodiment of the invention.
- the invention which will be described below aims to provide a new integrable filter structure whose frequency response is free of distortion and spurious response over a wide frequency band, thereby improving the filter performance.
- FIG. 2 illustrates an overview of the structure, according to one embodiment of the invention.
- a stripline structure 20 is composed of two layers 21, 23 of dielectrics separated by a conductive layer 22.
- the conductive layer 22 is etched in the pattern of a filter according to the principle of FIG.
- the filter according to FIG. 1 is described more explicitly in the documents as hereinafter referenced "George L. Matthaei, Leo Young & E. Mr. T. Jones. Microwaves Filters, Impedance-Matching Networks and Coupling Structures. Editions McGraw-Hill Inc.
- the conductive layer 22 will be called filter 22.
- the upper and lower outer faces of the stack of the two dielectric layers 21, 23 are covered over most of their surface by a conductive plane (not shown to facilitate understanding of Figure 2) constituting the ground planes of the structure 20.
- the ground planes are interconnected by metallization of the periphery of the structure 20 except in the vicinity of microwave access.
- the structure 20 also comprises two identical devices 24, 25 including an input transition device 24 and an output transition device 25, 25, illustrated in FIG. 3. These devices 24, 25 allow the passage of a microstrip mode to a stripline mode and vice versa. These devices 24, 25 each comprise:
- a metallized zone situated on its lower face and on the short side of the filter 22 as well as a interconnection hole 31 allowing the connection between the metallized zone and the stripline of access of the filter 22, and
- the geometry of the transition device 24, 25 is optimized in order to minimize the static wave rate (TOS) at the accesses of the filter 22 and also to minimize the excitation and the coupling of the TE10 mode. in a rectangular guide structure included in the structure 20.
- These devices 24, 25, further allow the transfer or assembly of the structure 20 by soldering on a microwave microstrip type printed circuit.
- the structure 20 comprises at least two conductive pillars 27 perpendicular to the plane of the structure 20, located closer to its main axis without any coupling with the filter 22 and connecting the upper and lower ground planes.
- these pillars 27 are made in the form of metallized vias through the two layers 21, 23, dielectric.
- the pillars 27 are solid metal rods.
- the assembly of the structure 20 according to the invention constitutes a bandpass filter which is free of distortion and spurious response over a wide band of frequency, and able to be assembled on a printed circuit microstrip microwave type.
- a significant advantage of the structure according to the invention is its ability to be achieved by means of standard microwave production techniques and therefore results in a relatively low cost of production.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1203420A FR2999813B1 (fr) | 2012-12-14 | 2012-12-14 | Structures de filtrage hyperfrequence |
| PCT/EP2013/003558 WO2014090375A1 (fr) | 2012-12-14 | 2013-11-22 | Structures de filtrage hyperfrequence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2932555A1 true EP2932555A1 (fr) | 2015-10-21 |
| EP2932555B1 EP2932555B1 (fr) | 2019-07-10 |
Family
ID=48468369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13821661.9A Active EP2932555B1 (fr) | 2012-12-14 | 2013-11-22 | Structures de filtrage hyperfrequence |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9941562B2 (fr) |
| EP (1) | EP2932555B1 (fr) |
| ES (1) | ES2752010T3 (fr) |
| FR (1) | FR2999813B1 (fr) |
| WO (1) | WO2014090375A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135935A (en) * | 1962-10-02 | 1964-06-02 | Bell Telephone Labor Inc | Transmission line and method of making |
| US6329890B1 (en) * | 1999-02-25 | 2001-12-11 | Thin Film Technology Corp. | Modular thin film distributed filter |
| EP1508935A1 (fr) * | 2003-08-22 | 2005-02-23 | Alcatel | Filtre passe-bande |
| US7423498B2 (en) * | 2005-09-20 | 2008-09-09 | Raytheon Company | Compact multilayer circuit |
| IN2012DN00266A (fr) * | 2009-07-14 | 2015-08-21 | Saab Ab |
-
2012
- 2012-12-14 FR FR1203420A patent/FR2999813B1/fr not_active Expired - Fee Related
-
2013
- 2013-11-22 WO PCT/EP2013/003558 patent/WO2014090375A1/fr not_active Ceased
- 2013-11-22 ES ES13821661T patent/ES2752010T3/es active Active
- 2013-11-22 US US14/651,896 patent/US9941562B2/en active Active
- 2013-11-22 EP EP13821661.9A patent/EP2932555B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014090375A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20160006095A1 (en) | 2016-01-07 |
| US9941562B2 (en) | 2018-04-10 |
| EP2932555B1 (fr) | 2019-07-10 |
| FR2999813B1 (fr) | 2017-07-14 |
| ES2752010T3 (es) | 2020-04-02 |
| WO2014090375A1 (fr) | 2014-06-19 |
| FR2999813A1 (fr) | 2014-06-20 |
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