EP2656434A1 - Diplexeur pour radar fmcw homodyne - Google Patents

Diplexeur pour radar fmcw homodyne

Info

Publication number
EP2656434A1
EP2656434A1 EP11796947.7A EP11796947A EP2656434A1 EP 2656434 A1 EP2656434 A1 EP 2656434A1 EP 11796947 A EP11796947 A EP 11796947A EP 2656434 A1 EP2656434 A1 EP 2656434A1
Authority
EP
European Patent Office
Prior art keywords
diplexer
waveguide
shells
coupling zone
transitions
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
Application number
EP11796947.7A
Other languages
German (de)
English (en)
Other versions
EP2656434B1 (fr
Inventor
Helmut Barth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP2656434A1 publication Critical patent/EP2656434A1/fr
Application granted granted Critical
Publication of EP2656434B1 publication Critical patent/EP2656434B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/181—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides
    • H01P5/182—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides the waveguides being arranged in parallel
    • 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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters

Definitions

  • the invention relates to a diplexer for a homodyne FMCW radar device.
  • the invention relates to such a diplexer constructed in waveguide technology.
  • diplexers are used to switch two inputs to one output and work as a crossover in this sense.
  • two input channels can be decoupled and separated in the signal direction, for example, to be able to operate on an antenna connected to an output channel. Echo signals that are reflected and received by the impact of transmit signals from the antenna on reflective surfaces can then be redistributed to the associated receivers.
  • signals in the diplexer are to be damped as low as possible, and on the other hand, the decoupling between the two input channels should be as large as possible. This means that signals should only be directed in the desired direction, while the highest possible attenuation occurs in the other direction.
  • Known diplexers for radar technology are arranged in the low-cost range, for example, as a microstrip line coupler directly on printed circuit boards and can be made very small, very precise and cost-effective, so that they are used in consumer products such as mobile phones.
  • Their disadvantages are their low directivity and high losses at moderate
  • Waveguide sections is formed.
  • a waveguide structure of such a diplexer consists in principle of two quasi parallel running waveguide channels, which are each formed of successive waveguide sections, the
  • the waveguide sections of a waveguide channel are
  • phase shift for one frequency must be 0 °
  • phase shift for the other frequency must be 180 °.
  • the frequency spacing between the two transmission frequencies is specified constructively by the diplexer.
  • detour lines are dimensioned at a multiple of the wavelength, since even smaller phase differences then multiply and the diplexer thereby obtains a narrower transmission curve.
  • the transmission frequencies are given by the fact that the same
  • Waveguide length for which one frequency must be an even integer multiple and for the second frequency an odd multiple of half wavelength is also becomes permeable to other frequencies, which are usually suppressed by an additional filter. Another reason for using a multiple wavelength is that it reduces the installed frequency spacing between the two transmission frequencies.
  • FMCW radar devices with a waveguide-type diplexer are particularly suited for broadband applications such as distance measurement and level measurement in industrial process instrumentation, because they are characterized by high performance and relatively easy adaptation to the desired frequencies ,
  • the invention is therefore an object of the invention to provide a diplexer for a homodyne FMCW radar device, which due to small dimensions of his
  • Waveguide structure can be easily and inexpensively manufactured.
  • a ratio of the dimensions of the waveguide to the dimensions of the coupling zone and the recesses is selected so that the diplexer shows a broadband behavior and allows propagation of an H20 wave in the coupling zone;
  • each waveguide gate transitions to the waveguide of the transmitter and receiver connected to the diplexer are provided, which transitions in their position and shape are designed so that they support the desired broadband behavior;
  • the diplexer is made of two symmetrical half-shells.
  • the waveguides of the diplexer have a rectangular cross-section.
  • the depressions are arranged in a further embodiment of the invention.
  • the diplexer is composed of two half-shells, the structure being made of waveguides,
  • the structure is manufactured essentially with a milling cutter with a diameter of the order of 1 mm.
  • the two are
  • Injection molded parts which may be in particular plastic injection molded parts.
  • Yet another embodiment of the invention relates to a level measuring device comprising a diplexer according to the invention.
  • Fig. 1 is a general schematic diagram of a diplexer with waveguide coupler in the
  • Fig. 2 is a perspective view of a structure of a
  • FIG. 3 shows a schematic diagram of the idealized diplexer according to the invention
  • Fig. 4 is a schematic diagram of a structure of the diplexer according to the invention with
  • Fig. 5 is a perspective view of a structure of a practical
  • FIG. 6 shows two half shells of the diplexer according to FIG. 3 with a milled-in structure.
  • FIG. 1 a diplexer 1 with two waveguide channels 12 and 14 is shown in FIG. 1, which are each formed from two waveguide sections 12a, 12b and 14a, 14b.
  • the waveguide channels 12 and 14 or the waveguide sections 12a, 12b, 14a, 14b are connected in a waveguide coupler 16.
  • a first port 18a, a second port 18b, a third port 18c and a fourth port 18d are found at the waveguide sections 12a, 12b and 14a, 14b.
  • the direction of the electric field E that is to say the direction of polarization at the first port 18a and at the fourth port 18d, is illustrated by an arrow 20 in each case.
  • the first port 18a and the fourth port 18d are the port gates which, as such, are themselves such
  • FIG. 2 is a perspective view of a structure of FIG.
  • Embodiment of the diplexer 30 according to the invention which is formed from two symmetrical half-shells 32 and 34.
  • a separation or cutting plane of the diplexer 30 according to the invention is formed from two symmetrical half-shells 32 and 34.
  • two waveguide channels 36 and 38 with a preferably rectangular cross-section and horizontal polarization, which are guided close to each other and parallel, are separated by a partition wall 42 so that a first end is provided at the waveguide sections 36a, 36b and 38a, 38b Gate 40a, a second gate 40b, a third gate 40c and a fourth gate 40d are formed.
  • the partition wall 42 is pierced in a section labeled "breakthrough 44" and constitutes a coupling zone 46 between the waveguide channels 36 and 38. Since the desired broadband behavior of the inventive diplexer 30 only at a certain ratio of waveguide dimensions to the Dimensions of the coupling zone 46 and the recesses 48, 50 adjusts are the
  • transitions 52a-52d are introduced at each waveguide port 40a-40d, which are designed in their position and shape so that they support the desired broadband behavior of the diplexer 30.
  • FIG. 3 Slot coupler in the plane of the electric field E 54 is illustrated in Fig. 3 in a schematic diagram.
  • the per se by an ideally "infinite" thin partition 42 separate waveguide channels 36, 38 are connected in the coupling zone 46 by means of the opening 44.
  • H10 mode waves can propagate in both the y and x directions.
  • An edge designated by "e1" in FIG. 3 forms a strong impurity for the field of an H10 mode wave coming from the first port 38a, which causes a vortex of the E field in the coupling zone 46 before the second gate 40b leads.
  • FIG. 3 The upper part of the illustration in FIG. 3 illustrates the coupling zone 46 (see FIG. 2) in the z-direction.
  • Waveguide structure makes it possible to easily create a diplexer for broadband applications.
  • Each of the impurities excites non-propagating evanescent waves that act as energy storage and to realize the electrical
  • the coupling zone lies in the z-direction designated in FIG. 3, so that both H20-mode and H01-mode waves are excited. How this can be used in a controlled manner is based on parameters of the structure shown in Fig. 4 of a particular embodiment of the
  • the particular manufacturing friendliness of the diplexer 30 according to the invention results from the realization of two symmetrical half shells, which can be made compact relative to the wavelength of the useful frequency. It has been shown that when using aluminum injection molded half shells
  • FIGS. 5 and 6 show in perspective the structure of a practical embodiment of the
  • Fig. 5 illustrates the individual structures cut into a block for each half-shell
  • Fig. 6 shows, on an enlarged scale, the blocks of the half-shells
  • the diplexer according to the invention is particularly suitable for a

Landscapes

  • Radar Systems Or Details Thereof (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un diplexeur (30) pour un radar FMCW homodyne, caractérisé par de faibles dimensions de sa structure de guide d'ondes et pouvant, de ce fait, être fabriqué de manière simple et peu coûteuse. Les structures de guide d'ondes du diplexeur (30) peuvent être découpées à partir de deux demi-coques (32, 34) qui peuvent être rassemblées pour former le diplexeur (30), ces demi-coques (32, 34) pouvant être faites de différents matériaux.
EP11796947.7A 2010-12-21 2011-12-01 Diplexeur pour radar fmcw homodyne Active EP2656434B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063800A DE102010063800A1 (de) 2010-12-21 2010-12-21 Diplexer für homodynes FMCW-Radargerät
PCT/EP2011/071460 WO2012084443A1 (fr) 2010-12-21 2011-12-01 Diplexeur pour radar fmcw homodyne

Publications (2)

Publication Number Publication Date
EP2656434A1 true EP2656434A1 (fr) 2013-10-30
EP2656434B1 EP2656434B1 (fr) 2018-02-21

Family

ID=45349471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11796947.7A Active EP2656434B1 (fr) 2010-12-21 2011-12-01 Diplexeur pour radar fmcw homodyne

Country Status (6)

Country Link
US (1) US9093735B2 (fr)
EP (1) EP2656434B1 (fr)
JP (1) JP5789673B2 (fr)
CN (1) CN103348529B (fr)
DE (1) DE102010063800A1 (fr)
WO (1) WO2012084443A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2518344B (en) * 2013-07-02 2015-09-30 Navtech Radar Ltd Radar Head
AU2016245350B2 (en) 2015-04-09 2019-10-24 Dejero Labs Inc. Systems, devices and methods for distributing data with multi-tiered encoding
DE102017109861A1 (de) * 2016-05-18 2017-11-23 Infineon Technologies Ag Verfahren und Vorrichtungen für Geschwindigkeits- und/oder Positionserfassung
DE112021007060T5 (de) * 2021-02-09 2023-11-23 Lisa Dräxlmaier GmbH Diplexervorrichtung mit vier anschlüssen

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US2475474A (en) * 1946-02-27 1949-07-05 Raytheon Mfg Co Radio communication system
US2587590A (en) * 1946-07-26 1952-03-04 Sperry Corp Ultrahigh-frequency apparatus
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EP0196065B1 (fr) * 1985-03-27 1990-10-31 Siemens Aktiengesellschaft Filtre de polarisation pour dispositifs HF
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JP2748920B2 (ja) 1996-05-27 1998-05-13 日本電気株式会社 導波管結合器
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EP1137186B1 (fr) * 2000-03-20 2004-07-21 Motorola, Inc. Générateur d'horloge réglable à dispersion spectrale et méthode à cet effet
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Also Published As

Publication number Publication date
DE102010063800A1 (de) 2012-06-21
JP2014507083A (ja) 2014-03-20
US20130271237A1 (en) 2013-10-17
CN103348529A (zh) 2013-10-09
CN103348529B (zh) 2015-09-30
WO2012084443A1 (fr) 2012-06-28
EP2656434B1 (fr) 2018-02-21
US9093735B2 (en) 2015-07-28
JP5789673B2 (ja) 2015-10-07

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