EP0330540A1 - Diviseur de puissance en guide d'ondes - Google Patents

Diviseur de puissance en guide d'ondes Download PDF

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Publication number
EP0330540A1
EP0330540A1 EP89400371A EP89400371A EP0330540A1 EP 0330540 A1 EP0330540 A1 EP 0330540A1 EP 89400371 A EP89400371 A EP 89400371A EP 89400371 A EP89400371 A EP 89400371A EP 0330540 A1 EP0330540 A1 EP 0330540A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
power
rectangular
mode
output waveguides
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.)
Withdrawn
Application number
EP89400371A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Pierre Bergero
Claude Couasnard
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0330540A1 publication Critical patent/EP0330540A1/fr
Withdrawn legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion

Definitions

  • the present invention relates to a power divider in waveguide, for microwave power transmission circuit operating at high power.
  • the technique of millimeter and centimeter waves of great power is currently developing thanks to generators and amplifiers such as gyrotrons.
  • waveguide power dividers Two types have been widely developed, those in the form of Y and those in the form of T. These dividers consist of an input waveguide which gradually deforms in order to obtain two output waveguides.
  • the set has the form of the capital letter T or the capital letter Y.
  • These power dividers allow the power introduced into the input guide to be divided into two equal or unequal parts. It depends on the dimensions of the section of the waveguides making up the three branches of the T or Y. In the case where the three branches have the same section, the power transmitted in the two output waveguides will be half of the power injected at the input.
  • These power dividers are also called 3dB couplers.
  • the object of the present invention is to remedy these drawbacks by presenting a power divider as a waveguide which is not very bulky and making it possible to obtain in each of the n output waveguides a fraction of the power injected into the input waveguide, n being an integer greater than or equal to two. This number n is however limited to the quantity of output waveguides that it is possible to juxtapose mechanically.
  • This power divider allows the passage of high powers. It is produced by the juxtaposition of several waveguide sections. It has a particularly compact shape even if the number n of output waveguides is quite large. It operates in the TE10 rectangular mode, which is the fundamental mode of the rectangular section waveguides. This mode is frequently used in microwave energy transmission circuits.
  • the present invention provides: a waveguide power divider for a microwave power transmission circuit, operating at high power, in the rectangular TE10 mode, comprising: - a rectangular input waveguide operating in its fundamental mode, receiving at one of its ends the power to be divided and having another closed end; a circular waveguide, propagating the TM01 mode, having a first end connected to the input rectangular waveguide by a lateral opening placed in the long side of the rectangular waveguide, near its closed end, of such that the axes of the two guides are perpendicular; divider characterized in that it further comprises a group of n output waveguides operating in the TE10 rectangular mode, distributed in a ring in front of a second end of the circular waveguide so that at least one of their long sides are cut substantially perpendicularly by a radius of the cross section of the circular guide and so that they each transmit in TE10 mode a fraction of the power introduced into the rectangular input waveguide.
  • the waveguide power divider shown in FIG. 1 is of the Y type.
  • the input waveguide 20 is for example a rectangular waveguide. It propagates an electromagnetic wave in the TE10 rectangular mode.
  • This waveguide 20 is gradually deformed in order to obtain two output waveguides 21, 22.
  • the two output waveguides 21, 22 have the same section. They also have the same section as the input waveguide 20.
  • the power transmitted in each of the output waveguides 21, 22 will be half the power introduced into the input waveguide 20.
  • This assembly is a divider of power by two. By adding to the output of each of the two waveguides 21, 22 a power divider of type Y as described above, one would obtain a power divider by four. With this kind of assembly the power is always divided by a power of two.
  • FIG. 2 represents, in longitudinal section, a power divider according to the invention.
  • This power divider is made up of the juxtaposition of several waveguide sections.
  • the entry is made by a waveguide 1 of rectangular section, operating in its fundamental mode.
  • This rectangular waveguide 1 input is excited by a source of electromagnetic waves 12 placed at its upper end 2. Its lower end 3 is closed.
  • a first end of a waveguide of circular section 4 is connected to the rectangular waveguide 1 of entry by a lateral opening 10 placed in the long side of the rectangular waveguide 1 of entry near its end closed 3.
  • the axes of the two waveguides are perpendicular.
  • the waveguide 4 propagates the TM01 mode because the distribution of the magnetic field in the rectangular waveguide 1 input at the level of the opening 10 corresponds to that of the TM01 mode in the waveguide 4 of circular section .
  • the opening 10 in the rectangular waveguide 1 input is large, which allows operation at high powers.
  • This structure makes it possible to transform the rectangular TE10 mode into the circular TM01 mode.
  • the power injected into the rectangular waveguide 1 input is transmitted into the circular waveguide 4.
  • a group of n output waveguides 15 is disposed at the other end 9 of the circular waveguide 4. Their longitudinal axes are parallel to that of the circular guide 4 but not coincident with it.
  • n output waveguides 15 are distributed in a ring at the periphery of the circular waveguide 4.
  • Each of these n output waveguides 15 has a rectangular section or of similar shape: trapezoidal, elliptical, with angles rounded, etc ...
  • the number n of output waveguide 15 is arbitrary but however greater than or equal to two.
  • the power injected into the rectangular input waveguide 1 being P
  • each output waveguide 15 will transmit a quarter of the power injected into the rectangular input waveguide 1.
  • FIG. 3 represents, in section along the axis AA ′, the four output waveguides 15. The distribution of the electric field is indicated inside each of them.
  • the distribution of the electric field, in the circular waveguide 4, is also shown.
  • each of the output waveguides 15 propagates the rectangular TE10 mode. Indeed, the distribution of the electric field in the circular waveguide 4 propagating the TM01 mode is along the radii of its cross section. In the n output waveguides 15, this distribution corresponds to that of the rectangular TE10 mode.
  • the diameter of the circular waveguide 4, at the junction with the n output waveguides 15, can be different from the optimal diameter of the circular waveguide 4 used for the first transition, this is ie for the transformation of the TE10 rectangular mode into circular TM en mode.
  • a diameter transition must be incorporated between the circular waveguide 4 and the n output waveguides 15. This transition can be done by single jump as shown in 6 in FIG. 2, by successive jumps or gradually. In the latter case, a progressive fitting will be introduced.
  • FIGS. 4a to 4f represent various possible shapes of the cross section of the n output waveguides 15.
  • FIGS. 4a to 4c and 4f make it possible to place a maximum of output waveguides 15 at the periphery of the circular waveguide 4 because they are slightly trapezoidal.
  • the elements bearing the mark 7 in FIG. 1 are fixing flanges which make it possible to connect one waveguide to another.

Landscapes

  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP89400371A 1988-02-23 1989-02-09 Diviseur de puissance en guide d'ondes Withdrawn EP0330540A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802127 1988-02-23
FR8802127A FR2627634B1 (fr) 1988-02-23 1988-02-23 Diviseur de puissance en guide d'ondes

Publications (1)

Publication Number Publication Date
EP0330540A1 true EP0330540A1 (fr) 1989-08-30

Family

ID=9363499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400371A Withdrawn EP0330540A1 (fr) 1988-02-23 1989-02-09 Diviseur de puissance en guide d'ondes

Country Status (4)

Country Link
US (1) US4922215A (ja)
EP (1) EP0330540A1 (ja)
JP (1) JPH029204A (ja)
FR (1) FR2627634B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2066694A1 (es) * 1992-12-23 1995-03-01 Telefonica Nacional Espana Co Divisor de potencia con union abrupta, aplicable en comunicaciones opticas.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6897739B2 (en) * 2003-03-13 2005-05-24 Northrop Grumman Corporation Waveguide power divider and combiner utilizing a resistive slot
US7432780B2 (en) * 2005-11-23 2008-10-07 Northrop Grumman Corporation Rectangular-to-circular mode power combiner/divider
US9357590B2 (en) 2012-03-14 2016-05-31 Microwave Materials Technologies, Inc. Microwave heating system with enhanced temperature control
JP5749841B1 (ja) 2014-08-12 2015-07-15 日本高周波株式会社 導波管型電力合成・分配器
JP5816768B1 (ja) * 2015-03-31 2015-11-18 日本高周波株式会社 導波管型電力合成・分配器
CA3056407A1 (en) 2017-03-15 2018-09-20 915 Labs, LLC Multi-pass microwave heating system
AU2018235948B2 (en) 2017-03-15 2023-05-18 915 Labs, Inc. Energy control elements for improved microwave heating of packaged articles
SG11201908588QA (en) 2017-04-17 2019-10-30 915 Labs Llc Microwave-assisted sterilization and pasteurization system using synergistic packaging, carrier and launcher configurations

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455158A (en) * 1944-08-15 1948-11-30 Philco Corp Wave guide coupling device
FR1314408A (fr) * 1961-10-03 1963-01-11 Thomson Houston Comp Francaise Diviseur de puissance pour lignes coaxiales
US3165743A (en) * 1963-01-11 1965-01-12 Hatkin Leonard Amplitude/phase monopulse antenna system
US3665481A (en) * 1970-05-12 1972-05-23 Nasa Multi-purpose antenna employing dish reflector with plural coaxial horn feeds
FR2255716A1 (ja) * 1973-12-20 1975-07-18 Thomson Csf

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582449B1 (fr) * 1979-07-24 1988-08-26 Thomson Csf Dispositif diplexeur de polarisations a large bande et antenne associee a un radar ou a un dispositif de contre-mesure comportant un tel dispositif
US4764775A (en) * 1985-04-01 1988-08-16 Hercules Defense Electronics Systems, Inc. Multi-mode feed horn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455158A (en) * 1944-08-15 1948-11-30 Philco Corp Wave guide coupling device
FR1314408A (fr) * 1961-10-03 1963-01-11 Thomson Houston Comp Francaise Diviseur de puissance pour lignes coaxiales
US3165743A (en) * 1963-01-11 1965-01-12 Hatkin Leonard Amplitude/phase monopulse antenna system
US3665481A (en) * 1970-05-12 1972-05-23 Nasa Multi-purpose antenna employing dish reflector with plural coaxial horn feeds
FR2255716A1 (ja) * 1973-12-20 1975-07-18 Thomson Csf

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INTERNATIONAL JOURNAL OF ELECTRONICS, vol. 57, no. 6, décembre 1984, pages 1219-1224, Londres, GB; G. JANZEN: "Mode converters from TE0m to TEm0 for high-power applications in the frequency range 1 to 30 GHz" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2066694A1 (es) * 1992-12-23 1995-03-01 Telefonica Nacional Espana Co Divisor de potencia con union abrupta, aplicable en comunicaciones opticas.

Also Published As

Publication number Publication date
US4922215A (en) 1990-05-01
FR2627634A1 (fr) 1989-08-25
FR2627634B1 (fr) 1990-03-23
JPH029204A (ja) 1990-01-12

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