• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The general field of the invention is that of bipolarization compact power splitters for radiofrequency power source. The splitter according to the invention comprises: - four identical orthomode transducers (10), eight identical waveguides (15), each waveguide comprising two elbows (16, 17), four identical junctions (20) in the form of T, four identical twists (30) and two power distributors (41, 42); the four orthomode transducers being of parallelepipedal shape with a square base, each transducer comprising on each of two adjacent lateral faces a waveguide connected to the lower face of the transducer; the four transducers being arranged to form a square, each transducer being connected to two junctions perpendicular to each other, the set of four junctions forming a Greek cross; - Each pair of junctions located in the same plane being connected by means of two twists to the two outputs of a power distributor having a single input.
    公开号:FR3071672A1
    申请号:FR1700993
    申请日:2017-09-28
    公开日:2019-03-29
    发明作者:Jean Philippe Fraysse；Herve Legay；Segolene Tubau
    申请人:Thales SA；
    IPC主号:
    专利说明:

    The field of the invention is that of bipolarization compact power distributors. This type of distributor is used to feed a network of radiating elements from a source emitting in the radio frequency domain. It can also function as a receiver in the same frequency domain. In this case, the dispatcher combines several signals received by the network into a single signal.
    The invention applies more particularly to the fields:
    - X-band, Ku-band and Ka-band active antennas;
    - focal beam multibeam antennas operating in the low frequency bands and more particularly in the C-band, L-band and S-band telecommunications fields;
    - radiating elements for network antennas;
    - global coverage space antennas, especially in C band.
    The main missions targeted are active X-band, Ku-band and Ka-band antennas for which the concepts of space and surface efficiency are essential.
    The openings of the radiating elements for these missions are of the order of 2.5 to 3.5 times the emission wavelength. As a result, the use of cones with high surface efficiencies for these applications is to be avoided, given their dimensions at these radiating opening sizes.
    An alternative solution is to network metallic radiating elements with smaller openings in order to benefit from their low heights and their very high surface efficiencies. To this end, it is then necessary to produce a power distributor supplying the accesses of these metallic elements in phase and with low losses. This distributor must be compact so as not to alter the gain in compactness brought about by the use of sources of reduced openings.
    Furthermore, as required, this distributor must also be able to operate:
    - in bi-polarization with an insulation between the two polarizations greater than 20 dB;
    - over large relative frequency ranges;
    - in circular polarization;
    - at moderate or high power levels.
    The use of propagation lines on "PCB", an acronym meaning "Printed Circuit Board" of microstrip or triplate type is an attractive option to obtain a very compact distributor. However, this approach is handicapped by the transmission losses it generates and the low power levels it allows.
    The option of using metal guides makes it possible to minimize transmission losses and withstand high power levels. However, it is penalized, for its part, by the size of the metal guides. Distributor architectures have been proposed to obtain compact distributors with this technology. French patent FR 3 012 917 entitled "Compact bipolarization power distributor, network of several distributors, compact radiating element and planar antenna comprising such a distributor" describes a planar power distributor with double polarization comprising at least four orthomode transducers known as "OMT" asymmetrical network connected able to be coupled in phase to a power supply with orthogonal double polarization by means of two power distributors mounted perpendicular to each other. In another configuration, the excitation assembly consists of a single symmetrical OMT connected to two distributors each having two output ports arranged so that the difference in electrical length between the two outputs is equal to half a length d wave of the transmission signal.
    These different solutions make it possible to achieve compact devices operating in bipolarization despite the use of metal guides. However, their bandwidths are not sufficient to address the large bandwidths required for active antenna applications of Ku-band and Ka-band communications satellites.
    The power distributor according to the invention does not have these drawbacks and makes it possible to reach higher bandwidths. It has four identical OMTs connected to two power distributors. More specifically, the subject of the invention is a compact bipolarization power distributor for a radiofrequency power source with orthogonal double polarization emitting at a wavelength of use, said distributor comprising four orthomode transducers, characterized in that the distributor comprises :
    eight identical waveguides, each waveguide comprising two elbows, four identical T-shaped junctions, the four orthomode transducers all being identical and of substantially parallelepipedal shape with square base, each transducer comprising a lower face and an upper face emission and four side faces, each transducer comprising on each of two adjacent side faces a waveguide connected to the underside of the transducer;
    the four transducers being arranged to form a square, each transducer being connected to two junctions perpendicular to each other, each junction being connected by its two branches of the T to the vertices of two waveguides, all four junctions forming a Greek cross centered on the square of the transducers.
    Advantageously, the distributor has four identical "twists" and two power distributors, each pair of junctions located in the same plane being connected by the base of said junctions by means of two twists to the two outputs of a power distributor having a single input. .
    Advantageously, the distributor comprises a coupler whose input is intended to be connected to the radiofrequency power source and the two perpendicular outputs between them being connected to the inputs of the two power distributors, said distributor thus constituted being capable of generating signals circularly polarized.
    Advantageously, the coupler is a “top-wall” coupler or a Riblet coupler.
    Advantageously, each power distributor has an input bent at 180 degrees connected to two identical transverse branches, each branch being terminated by a 90 degree elbow connected to an output, so that an input signal propagating in a given direction is separated into two identical output signals propagating in two directions parallel to each other and perpendicular to the given direction.
    Advantageously, the distributor includes at least one rejector filter.
    Advantageously, each twist comprises an enclosure in the form of a quarter of a flat cylinder, an inlet bent at 90 degrees and an outlet bent at 90 degrees, the two elbows being arranged head to tail.
    Advantageously, the side of the square base of each orthomode transducer is approximately 0.75 times the wavelength of use and in that the height of each orthomode transducer is approximately 0.37 times the wavelength of use.
    Advantageously, the side of the square base of the distributor is approximately 2.24 times the wavelength of use and in that the total height of the distributor is approximately 0.8 times the wavelength of use.
    Advantageously, the frequency associated with the wavelength of use is between 1 and 40 GHz. More specifically, the frequency associated with the wavelength of use is between 10.7 and 12.75 GHz or between 17.2 and 20.2 GHz.
    The invention will be better understood and other advantages will appear on reading the description which follows given without limitation and thanks to the appended figures all shown in a frame (x, y, z) among which:
    FIG. 1 represents an exploded three-dimensional view of a first configuration of a distributor according to the invention;
    FIG. 2 represents a sectional view of two adjacent orthomode transducers and of the T-junction which connects them;
    FIG. 3 represents a top view of the four orthomode transducers of the distributor;
    Figure 4 shows a sectional view of the distributor according to the invention;
    FIG. 5 represents a three-dimensional view of a twist according to the invention;
    FIG. 6 represents in top view the propagation of the polarization of the signals in the four transducers;
    FIG. 7 represents an exploded three-dimensional view of the propagation of the signals inside the distributor to the orthomode transducers not shown;
    FIG. 8 represents an exploded three-dimensional view of a second configuration of a distributor according to the invention;
    FIG. 9 represents an exploded three-dimensional view of a third configuration of a distributor according to the invention.
    In what follows, the transducer operates in emission. Of course, the same transducer can operate in reception.
    FIG. 1 represents an exploded three-dimensional view of a first configuration of the distributor according to the invention. This first configuration includes a “top-wall” type coupler. This view is oriented in a plane (x, y, z). This distributor has several superimposed floors.
    The top floor is the broadcast floor. It comprises four identical metal orthomode transducers 10 and of substantially rectangular shape with a square base, each transducer comprising a lower face 12 and an upper emission face 11 and four lateral faces 13, the assembly defining a cavity. For example, the side of the square base of each orthomode transducer is approximately 0.75 times the wavelength of use and the height of each orthomode transducer is approximately 0.37 times the wavelength of use. Each transducer may have a central adapter element in the form of a cone or pyramid or in the form of cylinders of different diameters stacked or of square base parallelepipeds of different stacked surfaces. The function of these elements is to improve the adaptation of the transducer on a determined operating frequency band and to improve the insulation between two polarizations.
    As can be seen in the sectional view of FIG. 2 made in a plane (x, y), each transducer comprises on each of two adjacent lateral faces a metal waveguide 15 connected to the underside of the transducer, the outlet of said waveguide from the top of the transducer. Each waveguide therefore comprises two elbows separated by a planar guide, a first elbow 16 to 90 degrees connected to the underside of the transducer, a second elbow 17 to 90 degrees located at the top of the transducer. The height of a waveguide is close to that of a transducer.
    As seen in Figure 3, the four transducers are arranged to form a square. Each transducer is connected to its two neighbors by two T-shaped junctions 20 perpendicular to each other, each junction being connected by the two branches of the T to the vertices of two waveguides, all four junctions forming a Greek cross centered on the square of the transducers as seen in Figure 3. Two junctions are arranged along the x axis and two junctions arranged along the y axis in this figure. Junctions are so-called "plane E" junctions. The bases of the junctions are at the level of the bases of the orthomode transducers as seen in FIG. 2.
    The stage located under the upper stage of the distributor is shown in the sectional view of FIG. 4. Its function is to facilitate the injection of the emission signals into the four junctions. Indeed, as arranged in a cross, it is not convenient to inject emission signals in phase inside the junctions. This stage comprises four identical twists 30, two power distributors 41 and 42 and the coupler 50. These different elements are represented by different hatching in FIG. 4.
    FIG. 5 represents a three-dimensional view of a twist 30 according to the invention. Each twist 30 comprises an enclosure 31 in the form of a quarter of a flat cylinder, an inlet 32 bent at 90 degrees and an outlet 33 bent at 90 degrees, the two elbows being arranged head to tail. Thus, with this configuration, the four inputs of the emission signals at the input of the twists are arranged on the sides of the large square formed by the four orthomode transducers so as to form two pairs of two orthogonal inputs between them.
    These two input pairs are connected to two power distributors 41 and 42. Each power distributor has a 180 degree angled inlet connected to two identical transverse branches, each branch being terminated by a 90 degree elbow connected to an outlet, so that an input signal propagating in a given direction is separated into two identical output signals propagating in two directions parallel to each other and perpendicular to the given direction.
    From the input of the power distributors to the eight outputs of the four orthomode transducers, the paths taken by the emission signals are perfectly identical. Thus, if a signal is sent to the input of one of the distributors, the four orthomode transducers emit four signals in phase with the same polarization. On the opposite input of the second distributor, we find the same property with the difference that the output signals have a linear polarization arranged 90 degrees from the previous one. All of these signals are also in phase. FIG. 6 shows a top view of the propagation of the linear polarization of the signals in the four transducers 10. The signals from the first distributor are represented by white arrows and the signals from the second distributor by black arrows.
    Also, if the distributor has a flat 50 “top-wall” coupler whose input is connected to the radio frequency power source and the two perpendicular outputs connected to the inputs of the two power distributors, said distributor thus constituted is suitable generating circularly polarized signals.
    FIG. 7 represents a partial exploded view of such a distributor in the reference (x, y, z). In this view, the orthomode transducers are not shown. The propagation of the signal through the various components 20, 30, 41, 42 and 50 of the distributor is represented by gray chevrons.
    By way of nonlimiting example, a distributor according to the invention has the following dimensions:
    - Side of the square base of the distributor: approximately 2.24 times the wavelength of use;
    - Total height of the distributor: about 0.8 times the wavelength of use.
    FIG. 8 represents a second configuration of the distributor according to the invention. In this second configuration, the top-wall coupler is replaced by a Riblet 51 coupler. As can be seen in FIG. 8, this coupler has two inputs and two outputs. A signal injected into one of the two inputs is distributed over the two outputs into two components of the same level but 90 ° out of phase.
    FIG. 9 shows a third configuration of the distributor according to the invention. In this configuration, the power distributor according to the invention includes rejection filters 53 so that the transmitted signal does not pollute the reception signal. These filters have the form of metal slots regularly spaced and arranged perpendicular to the propagation of the signal.
    The distributors according to the invention can operate in a frequency band between 1 and 40 GHz, which corresponds to a wavelength of use between 7.5 and 300 millimeters. More specifically, the frequency can belong to the so-called “Ku-Tx” or “Ka-Tx” transmission bands intended for satellite transmissions. The Ku-Tx band is between 10.7 and 12.75 GHz, which corresponds to a working wavelength between 23 and 28 millimeters. The second Ka-Tx band is between 17.2 and 20.2 GHz, which corresponds to a usage wavelength between 15 and 17 millimeters.
    This type of splitter can work with powerful power sources. For example, the power of the power source can be more than 60 watts.
    Furthermore, the geometry of the distributor ensures very low returns to the emission source, generally less than - 20 dB and very good insulation between the inputs of the “top-wall” coupler and the accesses to the orthomode transducers. These insulations are greater than 20 dB.
    权利要求:
    Claims (11)
    [1" id="c-fr-0001]
    1. Compact bipolarization power distributor for a radiofrequency power source with orthogonal double polarization emitting at a wavelength of use, said distributor comprising four orthomode transducers (10), characterized in that the distributor comprises:
    eight identical waveguides (15), each waveguide comprising two elbows (16, 17), four identical T-shaped junctions (20), the four orthomode transducers all being identical and of substantially rectangular shape with a square base , each transducer comprising a lower face (12) and an upper emission face (11) and four lateral faces (13), each transducer comprising on each of two adjacent lateral faces a waveguide (15) connected to the face lower (12) of the transducer;
    the four transducers being arranged to form a square, each transducer being connected to two junctions (20), perpendicular to each other, each junction being connected by its two branches of the T to the vertices of two waveguides, l 'set of four junctions forming a Greek cross centered on the square of the transducers.
    [2" id="c-fr-0002]
    2. Power distributor according to claim 1, characterized in that the distributor has four identical “twists” (30) and two power distributors (41, 42), each pair of junctions located in the same plane being connected by the base said junctions by means of two twists at the two outputs of a power distributor having a single input.
    [3" id="c-fr-0003]
    3. Power distributor according to claim 2, characterized in that the distributor comprises a coupler (50) whose input is intended to be connected to the radio frequency power source and the two outputs perpendicular to each other being connected to the inputs of two power distributors, said distributor thus formed being capable of generating circularly polarized signals.
    [4" id="c-fr-0004]
    4. Power distributor according to claim 3, characterized in that the coupler is a “top-wall” coupler or a Riblet coupler (51).
    [5" id="c-fr-0005]
    5. Power distributor according to one of claims 2 to
    4, characterized in that each power distributor has a 180 degree angled input connected to two identical transverse branches, each branch being terminated by a 90 degree elbow connected to an output, so that an input signal propagating in a given direction is separated into two identical output signals propagating in two directions parallel to each other and perpendicular to the given direction.
    [6" id="c-fr-0006]
    6. Power distributor according to one of claims 2 to
    5, characterized in that said distributor comprises at least one rejector filter (53).
    [7" id="c-fr-0007]
    7. Power distributor according to one of the preceding claims, characterized in that each twist (30) comprises an enclosure (31) in the form of a quarter of a flat cylinder, an inlet (32) bent at 90 degrees and an outlet (33 ) angled 90 degrees, the two elbows being arranged head to tail.
    [8" id="c-fr-0008]
    8. Power distributor according to one of the preceding claims, characterized in that the side of the square base of each orthomode transducer is approximately 0.75 times the wavelength of use and in that the height of each orthomode transducer is worth about 0.37 times the wavelength of use.
    [9" id="c-fr-0009]
    9. Power distributor according to one of the preceding claims, characterized in that the side of the square base of the distributor is approximately 2.24 times the wavelength of use and in that the total height of the distributor is approximately 0.8 times the wavelength of use.
    [10" id="c-fr-0010]
    10. Power distributor according to one of the preceding claims, characterized in that the frequency associated with the wavelength of use is between 1 and 40 GHz.
    5
    [0011]
    11. Power distributor according to claim 10, characterized in that the frequency associated with the wavelength of use is between 10.7 and 12.75 GHz or between 17.2 and 20.2 GHz.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3462532B1|2020-10-07|Power divider for antenna comprising four identical orthomode transducers
    EP2869400B1|2019-03-27|Bi-polarisation compact power distributor, network of a plurality of distributors, compact radiating element and planar antenna having such a distributor
    EP2202839B1|2019-05-22|Compact feed system for the generation of circular polarisation in an antenna and method of producing such system
    EP2564466B1|2014-04-02|Compact radiating element having resonant cavities
    EP2869396B1|2020-07-22|Power divider including a T-coupler in the E-plane, radiating network and antenna including such a radiating network
    EP3179551B1|2021-02-24|Compact bipolarisation drive assembly for a radiating antenna element and compact network comprising at least four compact drive assemblies
    CA1290449C|1991-10-08|Device for exciting a circularly polarized wage guide by means of a planar antenna
    FR3034262A1|2016-09-30|COMPACT BUTLER MATRIX, PLANAR BIDIMENSIONAL BEAM FORMER AND FLAT ANTENNA COMPRISING SUCH A BUTLER MATRIX
    EP3176875A1|2017-06-07|Active antenna architecture with reconfigurable hybrid beam formation
    CA2029378A1|1991-05-25|Circular polarization antenna, particularly for an antenna network
    FR2993716A1|2014-01-24|MULTIFUNCTIONAL MULTI-SOURCE SENDING AND RECEIVING ANTENNA BY BEAM, ANTENNA SYSTEM AND SATELLITE TELECOMMUNICATION SYSTEM COMPRISING SUCH ANTENNA
    FR2641133A1|1990-06-29|
    WO2018141882A1|2018-08-09|Elementary antenna comprising a planar radiating device
    EP3180816B1|2018-05-02|Multiband source for a coaxial horn used in a monopulse radar reflector antenna.
    WO2009112377A1|2009-09-17|Multi-source spatial power amplifier
    EP3664214A1|2020-06-10|Multiple access radiant elements
    EP0489632A1|1992-06-10|Microwave hybrid coupler with 3xN inputs and 3xM outputs, especially 3x3 coupler
    EP3824511A1|2021-05-26|Radiofrequency component having a plurality of waveguide devices provided with ridges
    EP3900113A1|2021-10-27|Elementary microstrip antenna and array antenna
    FR3105611A1|2021-06-25|Dual polarized antenna
    FR2581268A1|1986-10-31|Microwave power transmitter.
    FR2890790A1|2007-03-16|Double beam radar antenna for e.g. microwave frequency energy transmission, has conducting blades radiated directionally in space with various radiation field patterns, and tongues propagating radiation directionally to guide cavity opening
    FR2729011A1|1996-07-05|Dual polarisation antenna network
    同族专利:
    公开号 | 公开日
    EP3462532A1|2019-04-03|
    US20190097296A1|2019-03-28|
    CN109616729A|2019-04-12|
    US10673118B2|2020-06-02|
    FR3071672B1|2019-10-11|
    EP3462532B1|2020-10-07|
    CA3017113A1|2019-03-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2582865A1|1985-06-04|1986-12-05|Labo Electronique Physique|UNITARY MODULES OF MICROWAVE ANTENNA AND MICROWAVE ANTENNA COMPRISING SUCH MODULES|
    EP1930982A1|2006-12-08|2008-06-11|Im, Seung joon|Horn array antenna for dual linear polarization|
    WO2014127420A1|2013-02-21|2014-08-28|Bae Systems Australia Ltd|Wideband antenna system and method|
    EP2869400A1|2013-11-04|2015-05-06|Thales|Bi-polarisation compact power distributor, network of a plurality of distributors, compact radiating element and planar antenna having such a distributor|
    EP3179551A1|2015-12-11|2017-06-14|Thales|Compact bipolarisation drive assembly for a radiating antenna element and compact network comprising at least four compact drive assemblies|
    US7397323B2|2006-07-12|2008-07-08|Wide Sky Technology, Inc.|Orthomode transducer|
    AT542260T|2009-02-02|2012-02-15|Centre Nat Etd Spatiales|ORTHOMODE CONVERTER FOR A WAVEGUIDE|
    US9287615B2|2013-03-14|2016-03-15|Raytheon Company|Multi-mode signal source|
    CN205609721U|2016-05-11|2016-09-28|江苏尚瑞通信科技有限公司|Ware is divided to low -loss " n " shape cavity merit|EP3866256A1|2020-02-12|2021-08-18|European Space Agency|Waveguide power divider|
    CN112688068B|2020-12-21|2021-11-23|西安电子科技大学|Miniaturized broadband triple-polarized antenna|
    CN113078450B|2021-03-22|2022-02-01|北京交通大学|Dual-polarized air waveguide array antenna|
    法律状态:
    2018-08-28| PLFP| Fee payment|Year of fee payment: 2 |
    2019-03-29| PLSC| Search report ready|Effective date: 20190329 |
    2019-08-29| PLFP| Fee payment|Year of fee payment: 3 |
    2020-08-26| PLFP| Fee payment|Year of fee payment: 4 |
    2021-08-26| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1700993A|FR3071672B1|2017-09-28|2017-09-28|POWER DISTRIBUTION FOR ANTENNA COMPRISING FOUR IDENTICAL ORTHOMOD TRANSDUCERS|
    FR1700993|2017-09-28|FR1700993A| FR3071672B1|2017-09-28|2017-09-28|POWER DISTRIBUTION FOR ANTENNA COMPRISING FOUR IDENTICAL ORTHOMOD TRANSDUCERS|
    EP18191406.0A| EP3462532B1|2017-09-28|2018-08-29|Power divider for antenna comprising four identical orthomode transducers|
    CA3017113A| CA3017113A1|2017-09-28|2018-09-12|Power divider for an antenna comprising four identical orthomode transducers|
    US16/130,844| US10673118B2|2017-09-28|2018-09-13|Power divider for an antenna comprising four identical orthomode transducers|
    CN201811114359.6A| CN109616729A|2017-09-28|2018-09-25|The power divider for antenna including four identical orthomode transducers|
    [返回顶部]