JP2005341443A - Power distributor using waveguide slot coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturized and lightweight power distributor capable of highly efficiently distributing great-power microwaves. <P>SOLUTION: In a power distributor using waveguide slot coupling, the size of a waveguide is added to a design parameter, the dimension of the waveguide is changed from a conventional international standard dimension, and the characteristic impedance of a microstrip line is matched to the characteristic impedance of the waveguide. Thus, a power distributor having a 90% or a higher coupling degree over wide frequency bands can be obtained. Furthermore, a waveguide is used for a power input section, the power distributor is also capable of being sufficiently immune to great-power microwave inputs. Moreover, since only a substrate whose thickness is 1 mm or less is mounted with the waveguide size as the size of the power distributor, the power distributor can be small-sized and lightweight extremely. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power distributor, and more particularly to a power distributor using waveguide slot coupling.

  As a technology for realizing a space solar power system (SSPS), a waveguide slot-fed active integrated antenna for high-efficiency microwave power transmission has been developed. SSPS uses an ultra-large phased array (number of antenna elements: billions) with a diameter of several kilometers arranged in an orbit around the earth. It is intended to transmit microwaves to the receiving station. In order to establish this system, multiple requirements such as high-precision beam control, high efficiency of the power transmission unit (overall efficiency of 80% excluding solar cells), and minimization of the power transmission system weight (several g / W) It is necessary to meet the standards.

  In particular, in order to increase the efficiency of the power transmission unit, when the power generated by the solar panel is transmitted to the ground by the active phased array antenna, power is efficiently transferred from the solar panel power supply unit to the active phased array antenna power supply unit. It is necessary to distribute and supply. Due to these needs, waveguide slot-fed active integrated antennas have been conventionally developed.

  The waveguide slot-fed active integrated antenna is a system that achieves particularly low loss and thinning of the power distribution unit. FIG. 1 shows the configuration of a waveguide slot-microstrip line power divider used in a waveguide slot-fed active integrated antenna. A conventional waveguide slot-microstrip line power distributor has a TE10 mode, and includes an international standard rectangular waveguide 1 having one end as a termination surface, and a microstrip line. As shown in FIG. 1, a slot 1 (5) and a slot 2 (6) are provided on the tube wall perpendicular to the electric field direction of the rectangular waveguide 1, and the slots 1 (5) and 2 (6) are provided on the slot 1 (5) and the slot 2 (6). Microstrip line 1 (3) and microstrip line 2 (4) are arranged. A microwave is input to the open end of the waveguide 1 as electric power. The microwaves input to the waveguide 1 pass through the slot 1 (5) and the slot 2 (6), and the microstrip line 1 (3) disposed on the slot 1 (5) and the slot 2 (6). And electromagnetically coupled to the microstrip line 2 (4) and distributed from the microstrip line 1 (3) and the microstrip line 2 (4) for output. The advantage of using the slots (5, 6) provided in the waveguide 1 as a power distributor is that there is no radiation loss in the microstrip line 1 (3) and the microstrip line 2 (4), the waveguide 1 and The production of the microstrip line 1 (3) and the microstrip line 2 (4) is easy, the overall thickness of the power distributor can be reduced, and heat radiation is achieved by using the tube wall of the waveguide 1. It is possible.

  For example, looking at the thickness of the entire power distributor, power is distributed from the waveguide 1 to the microstrip line 1 (3) and the microstrip line 2 (4) using electromagnetic coupling. The thickness of the power distributor can be suppressed to the extent that the thickness of the waveguide 1 is added to the thickness of the substrate 2 of the microstrip line. Further, since electric power is supplied to the waveguide 1, the power distributor of this form can be used as a high power distributor.

  In order to investigate the electrical characteristics of the power distributor using the waveguide slot coupling described above, a simulation model was created using a high frequency electromagnetic field simulator (HFSS). A plurality of model parameters were set, and a computer simulation was conducted to find out the feasibility of the power divider using the waveguide slot coupling related to the waveguide slot-fed active integrated antenna.

  FIG. 2A shows a simulation model of a power distributor using a conventional waveguide slot coupling. In FIG. 2A, the waveguide is such that the microstrip line 1 (22) and the microstrip line 2 (23) are disposed on the slot 1 (24) and the slot 2 (25) provided in the waveguide 20. A microstrip substrate 21 is placed on the tube 20. The coordinate system of the simulation model is set as shown in FIG. 2A. The open end in the + x direction of the waveguide is set to PORT1 (26). The -y direction end of the microstrip line 1 (22) is set to PORT2 (27), and the -y direction end of the microstrip line 2 (23) is set to PORT3 (28). The electric power input to the waveguide 20 from the PORT 1 (26) is radiated from the slot 1 (24) and the slot 2 (25) provided in the waveguide 20, and the microstrip disposed on each slot. Each line is electromagnetically coupled and distributed. The distributed power is output from PORT2 (27) and PORT3 (28).

  FIG. 2B shows model parameter values when the simulation is performed using the simulation model described above, and the positional relationship of each parameter in the waveguide, the slot portion, and the microstrip. The parameters of the electromagnetic coupling section include: microstrip line open stub length Lm, slot length Ls, slot width Ws, microstrip line offset length dm, microstrip line width Wm, dielectric constant εr of the dielectric substrate (substrate) , And dielectric substrate (substrate) thickness h. Further, the parameters of the waveguide slot portion include a slot offset length d, a waveguide dimension a (H plane), and b (E plane). In particular, in the conventional simulation model, the standard dimension of WRJ-6 corresponding to the frequency 5.6 GHz of the microwave input as electric power to the waveguide 20 as the parameter of the waveguide slot portion is the waveguide dimension a. (H surface) and b (E surface) are used as they are.

  FIG. 3 shows the result of simulation by a high frequency electromagnetic field simulator (HFSS) using the parameter values shown in FIG. 2B. FIG. 3 (a) shows S11, S21, and S31 from 4 GHz to 7 GHz. FIG. 3B shows the coupling factor from 4 GHz to 7 GHz. Here, the coupling factor is defined as follows.

図３（ａ）に示されているように、導波管２０へ電力を供給するためにＰＯＲＴ１（２６）に入力されるマイクロ波の反射率は、５．６ＧＨｚにおいて、７．１％である。また、ＰＯＲＴ１（２６）入力されて、ＰＯＲＴ２（２７）およびＰＯＲＴ３（２８）より出力されるマイクロ波の５．６ＧＨｚにおける通過損失はそれぞれ−５ｄＢ程度である。図３（ｂ）に示されているように、このときの結合度は、５．６ＧＨｚにおいて６６．５％である。つまり、従来シミュレーションモデルにおいては、導波管に入力される電力のおよそ３３．５％の電力がマイクロストリップラインに結合せずに空間に漏れ出していることになる。

As shown in FIG. 3A, the reflectance of the microwave input to the PORT 1 (26) for supplying power to the waveguide 20 is 7.1% at 5.6 GHz. . Further, the passage loss at 5.6 GHz of the microwaves inputted from the PORT1 (26) and outputted from the PORT2 (27) and the PORT3 (28) is about -5 dB. As shown in FIG. 3B, the degree of coupling at this time is 66.5% at 5.6 GHz. That is, in the conventional simulation model, approximately 33.5% of the power input to the waveguide leaks into the space without being coupled to the microstrip line.

  As described above, the space solar power generation system aims at an overall efficiency of 80% or more excluding solar cells, and the performance in the conventional simulation model is not efficient enough. For this reason, when power is distributed from the waveguide 20 to the microstrip line, further improvement in efficiency is required. Ultimately, this portion aims at a coupling degree of 95%.

  Several proposals have been made so far in relation to these technologies.

  For example, “A Slotted Waveguide Quasi-Optical Power Amplifier” has been proposed by Mortazawi et al. In this “A Slotted Waveguide Quasi-Optical Power Amplifier”, it is reported that a coupling degree of 93% was obtained in an electromagnetic coupling simulation model of a waveguide slot and a microstrip line divided into eight.

  In addition, in the “waveguide-microstrip line converter” disclosed in Japanese Patent Application Laid-Open No. 8-148913, a rectangular waveguide having a TE10 propagation mode and having one end as a termination surface, and the rectangular waveguide And a slot provided on the tube wall of the rectangular waveguide in a direction intersecting with the high-frequency current generated on the inner surface of the rectangular waveguide, and a strip-shaped feed conductor formed in a part of the strip conductor disposed in the direction intersecting with the slot Waveguide-microstrip line converters with strip lines have been proposed.

  In addition, in the “waveguide-microstrip line converter” disclosed in Japanese Patent Laid-Open No. 9-246816, a slot penetrating into and out of the waveguide is provided on the tube wall perpendicular to the electric field of the waveguide, A waveguide-microstrip line converter in which a part of the microstrip line is disposed on the slot has been proposed.

  Further, in the “high-frequency line converter” disclosed in Japanese Patent Laid-Open No. 2002-9512, a high-frequency line converter that transmits a signal from a high-frequency line to a waveguide or in the opposite direction is proposed. The high-frequency line converter includes a substrate having a high-frequency line formed on the front surface and a slot resonator formed on the back surface, and a waveguide portion interposed between the substrate and the waveguide and electromagnetically coupled to the slot resonator. The waveguide plays a role of impedance matching between the high-frequency line and the waveguide.

JP-A-8-148913 JP-A-9-246816 JP2002-9512 R. Bashirullah, A.M. Mortani, “A Slotted Waveguide Quasi-Optical Power Amplifier”, “IEEE MTT-S International Microwave Symposium Digest, Vol. 2, pp. 671-674, June 13-19, 1999. ”

  An object of the present invention is to provide a power distributor using waveguide slot coupling that has a high degree of coupling and low reflection loss.

  In the following, means for solving the problem will be described using reference numerals with parentheses used in [Best Mode for Carrying Out the Invention]. These symbols are added in order to clarify the correspondence between the description of [Claims] and the description of the best mode for carrying out the invention. ] Should not be used for interpretation of the technical scope of the invention described in the above.

  The power distributor of the present invention includes a microstrip line (43, 44) and a rectangular waveguide (41) having a TE10 mode and having one end short-circuited, and the electric field direction of the waveguide (41). Slots (45, 46) are provided on the tube wall perpendicular to the microstrip line (43, 44), and the characteristic impedance of the waveguide (41) is the waveguide ( 41) The E plane dimension and the H plane dimension of 41) are adjusted to match the characteristic impedance of the microstrip line (43, 44).

  Further, power is supplied to the waveguide (41) of the power distributor of the present invention, and the power is 90% or more with respect to the microstrip line (43, 44) through the slot (45, 46) at a predetermined frequency. It is distributed with the degree of coupling.

  Also, the slot length of the power distributor of the present invention is half the in-tube wavelength of the microwave input to supply power to the waveguide (41), and the microstrip lines (43, 44) are The slots (43, 44) are arranged perpendicular to the longitudinal center.

  In addition, the waveguide (41) of the power distributor of the present invention has a heat dissipation structure, and heat dissipation of the power distributor is performed by the heat dissipation structure.

  Further, the reflectance at which the power input to the waveguide (41) of the power distributor of the present invention is reflected from the input port of the waveguide (41) at a predetermined frequency is less than 1%.

  The coupling degree of the power distributor of the present invention is defined as the ratio of the power coupled to the microstrip line (43, 44) to the transmitted power to the waveguide (41), and the coupling degree is 0 at 5 GHz to 7 GHz. .05 / GHz or less flatness.

  The waveguide slot-fed active integrated antenna (70) of the present invention also includes a power distributor.

  In addition, the space solar power generation system (84) of the present invention includes a power distributor.

  According to the present invention, a high-power microwave can be distributed with high efficiency, and a small and lightweight power distributor can be supplied.

  The best mode for carrying out a power distributor using waveguide slot coupling according to the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1)
FIG. 4 shows the configuration of a power distributor using waveguide slot coupling according to the first embodiment of the present invention. The basic configuration of the power distributor using the waveguide slot coupling according to the present embodiment is the same as that of the power distributor using the waveguide slot coupling according to the conventional embodiment shown in FIG. is there. The power distributor using the waveguide slot coupling of the present embodiment has a TE10 mode, a rectangular waveguide 41 having one end as a termination surface, a substrate 42, a microstrip line 1 (43) and a microstrip. And a microstrip line having a strip line 2 (44). Slot 1 (45) and slot 2 (46) are provided on the tube wall perpendicular to the electric field direction of waveguide 41. A microstrip line 1 (43) and a microstrip line 2 (44) are arranged vertically in the center in the longitudinal direction of the slot 1 (45) and the slot 2 (46).

  A microwave that is input from the open end of the waveguide 41 and supplies power propagates in the direction of the magnetic field of the waveguide, travels, is distributed to the slot 1 (45) and the slot 2 (46), and is guided to the waveguide. 41 is emitted to the outside. A microstrip line 1 (43) and a microstrip line 2 (44) are arranged on the slot 1 (45) and the slot 2 (46), and are emitted from the slot 1 (45) and the slot 2 (46). The microwaves are electromagnetically coupled to the microstrip line 1 (43) and the microstrip line 2 (44) and propagate along the microstrip line 1 (43) and the microstrip line 2 (44).

The difference between the power divider using the waveguide slot coupling according to the present embodiment and the power divider using the waveguide slot coupling according to the conventional embodiment is that
(A) In order to increase the degree of coupling between the waveguide 41 and the microstrip line 1 (43) and the microstrip line 2 (44), the characteristic impedance of the waveguide 41 is the microstrip line 1 (43) and the microstrip. That is, the dimensions are changed to match the characteristic impedance of the line 2 (44). For this reason, the dimension of the H surface of the waveguide 41 and the dimension of the E surface are changed, and the dimension of the E surface in the electric field direction parallel to the electric field direction is remarkably shortened.

(B) Further, the characteristic impedance of the waveguide 41 is matched with the characteristic impedance of the microstrip line 1 (43) and the microstrip line 2 (44), so that power distribution using the conventional waveguide slot coupling is performed. In the present embodiment, the arrangement position of the macro strip line with respect to the slot is the slot end portion with low impedance, but in this embodiment, the micro strip line 1 (43 ) And microstrip line 2 (44), respectively. This is because the waveguide 41 and the microstrip line 1 (43) and the microstrip line 2 (44) are impedance-matched at the center of the slot where the impedance is the highest, so that the slot 1 (45) is removed from the waveguide. This is because most of the power radiated to the space through the slot 2 (46) is coupled to the microstrip line 1 (43) and the microstrip line 2 (44).

[Simulation model]
Based on the above concept, a simulation model according to the present embodiment was created using a high frequency electromagnetic field simulator (HFSS). A simulation model according to the present embodiment is shown in FIG. 5A. The simulation model configuration according to the present embodiment is the same as the simulation model of the waveguide slot-microstrip conversion unit according to the conventional embodiment, and the description of the model is omitted here.

[Simulation parameters]
FIG. 5B shows the values of model parameters when the simulation is executed using the simulation model according to the embodiment of the present invention, and the positional relationship of each parameter in the waveguide, slot portion, and microstrip. Yes. The model parameters set in the simulation model of the present embodiment are the same as the model parameters set in the conventional simulation model. Particularly, in the simulation model according to the embodiment of the present invention, the waveguide 50 is guided for the purpose of matching the characteristic impedance of the waveguide 50 to the characteristic impedance of the microstrip line 1 (52) and the microstrip line 2 (53). The parameter search is performed on the “waveguide H surface dimension (a)” and the “waveguide E surface dimension (b)” of the tube slot portion. Further, as described above, for the purpose of impedance matching between the waveguide 50 and the microstrip line 1 (52) and the microstrip line 2 (53) at the center position of the slot with the highest impedance, the microstrip line is “Offset length (dm) of the microstrip line” which is a model parameter indicating how far the slot is arranged from the center is set to 0 mm.

[simulation result]
FIG. 6 shows the result of setting the values of the parameters shown in FIG. 5B and executing them by the high frequency electromagnetic field simulator (HFSS). FIG. 6A shows S11, S21, and S31 from 4 GHz to 7 GHz. FIG. 6B shows the coupling factor from 4 GHz to 7 GHz. Here, the definition of the degree of coupling η is the same as the definition in the conventional embodiment.

As shown in FIG. 6A, the reflectance of the microwave input to the PORT 1 (56) for supplying power to the waveguide 50 is 0.03% at 5.6 GHz. . Further, the passage losses at 5.6 GHz of the microwaves input to PORT1 (56) and output from PORT2 (57) and PORT3 (58) are about S ₂₁ = −2 dB and S ₃₁ = −4 dB, respectively. . As shown in FIG. 6B, the degree of coupling at this time is 90% or more at 5.6 GHz. That is, in the simulation model according to the present embodiment, 90% or more of the power input to the waveguide 50 is electromagnetically coupled to the two microstrip lines 52 and 53 and distributed. In addition, at a frequency higher than 5 GHz which is the cut-off frequency of the waveguide in this embodiment, a coupling degree of about 90% is maintained over a frequency band of 2 GHz or higher from 5 GHz to 7 GHz.

  In the present embodiment, the reflectance of the microwave input to the waveguide 50 is suppressed to only 0.03% at a predetermined frequency, and the power actually input to the waveguide 50 is microscopic. The coupling efficiency of the power distributed to the strip lines 52 and 53 is 90% or more. This means that in the power distributor using the waveguide slot coupling according to the present embodiment, the loss due to leakage from the coupling portion is very small and the efficiency is improved.

  In the embodiment of the present invention, the size of the waveguide 41 is added to the design parameters, the dimensions of the waveguide 41 are changed from the conventional international standard dimensions, and the characteristic impedance of the microstrip lines 43 and 44 and the waveguide are changed. The characteristic impedance of the tube 41 is matched. As a result, it is possible to realize a power distributor having a high coupling degree of 90% or more over a wide frequency band.

  Further, by using the waveguide 41 for the power input unit, it is possible to provide a power distributor that can sufficiently withstand the input of high-power microwaves generated by a magnetron, traveling wave tube (TWT), or the like. . Furthermore, it is possible to cope with high-frequency microwaves within the range of processing accuracy of the waveguide.

  In addition to this, since the size of the power distributor is simply a structure in which the substrate 42 having a thickness of about 1 mm or less is loaded on the waveguide size, it can be made very small and light, and the structure is simple. Therefore, it can be easily developed into a multi-distribution structure.

(Embodiment 2)
FIG. 7 shows a configuration of a waveguide slot-fed active integrated antenna 70 provided with a power distributor using the waveguide slot coupling shown in the first embodiment.

  The waveguide slot-fed active integrated antenna 70 includes a power distributor unit using a waveguide slot coupling and an active integrated antenna unit. The power distributor unit using the waveguide slot coupling includes a waveguide 71, a waveguide slot line 73, a microstrip line 72, and a power feeding unit 74A. The configuration and operation of the power distributor using slot coupling are as described in the first embodiment.

  The active integrated antenna unit includes a feeding layer 74 </ b> C, a phase control layer 76, and an antenna layer 79. The feed layer 74 </ b> C includes a feed layer feed unit 74 </ b> B and a patch antenna 75 on the substrate for electromagnetically coupling with the phase control layer 76. The phase control layer 76 includes an active device 77 and a phase shifter 78. The antenna layer 79 includes an on-substrate patch antenna 75 for electromagnetic coupling with the phase control layer 76 and an antenna group 100 for transmitting microwaves to the ground base station.

  The power feeding unit 74A of the power distributor unit using the waveguide slot coupling and the power feeding layer power feeding unit 74B of the active integrated antenna unit are electrically connected. Then, the electric power distributed and output to the power feeding unit 74A is sent to the power feeding layer power feeding unit 74B formed in the power feeding layer 74C. In the power feeding layer 74C, an on-substrate patch antenna 75 is formed on the back surface of the surface on which the power feeding layer power feeding portion 74B is formed. The feeding layer feeding unit 74B and the substrate upper patch antenna 75 are electrically connected to each other, and the power transmitted to the feeding layer feeding unit 74B is opposed to the substrate via the substrate patch antenna 75. Electromagnetically coupled to layer 76. The power supplied to the phase control layer from the feed layer feed section 74B via the on-substrate patch antenna 75 is amplified by the Active Device 77 formed on the phase control layer 76, and also formed on the phase control layer 76. The phase shifter 78 controls the phase. The microwave power amplified and phase-controlled in the phase control layer 76 is electromagnetically coupled via the on-substrate patch antenna 75 formed on the surface of the antenna layer 79 facing the phase control layer 76. Thus, power is supplied to the antenna layer. An antenna group 100 is formed on the back surface of the antenna layer 79 on which the patch antenna 75 on the substrate is formed, and the power transmitted to the antenna layer 79 via the antenna group 100 is in the form of a microwave. Is sent to the ground station.

  According to this embodiment, in the active integrated antenna unit, phase control by a low-loss phase shifter and microwave radiation to a ground base station by an integrated antenna are performed. By integrating the power divider unit using waveguide slot coupling and the active integrated antenna unit, the propagation loss is reduced compared to creating an active circuit such as a phase shifter and an antenna separately. It is possible to reduce the size and weight while reducing the number.

  In the waveguide slot-fed active integrated antenna 70 of the present embodiment, a power transmission antenna having a large area can be formed by arranging the waveguides 71 two-dimensionally. For example, in FIG. 7, the waveguides 71A and 71B equivalent to the waveguide 71 are arranged only in one direction, but this is arranged in two directions so that a power transmission antenna having a larger area can be obtained. It can also be formed.

(Embodiment 3)
FIG. 8 shows the configuration of a space solar power system (SSPS) provided with the waveguide slot-fed active integrated antenna shown in the second embodiment.

  This space solar power generation system 84 includes a satellite body 80 equipped with a bus device that controls satellite attitude control, satellite power control, and communication between the satellite and the ground station, and a microwave power transmission unit 82 that is a mission device. Prepare. The microwave power transmission unit 82 includes a solar cell 81 and a power transmission antenna 83.

  The microwave power transmission unit 82 transmits the power generated by the solar cell 81 from the power transmission antenna 83 in the form of microwaves to a receiving station installed on the ground and other space devices arranged on the orbit. It is a mission equipment for the purpose. The microwave power transmission unit 82 has power transmission antennas 83 at both ends of a large-area panel, and has a solar cell 81 on the space-oriented surface of the large-area panel. By applying the waveguide slot-fed active integrated antenna shown in the second embodiment to the power transmission antenna 83, the power generated by the solar cell 81 is efficiently installed on the ground by microwaves. It is transmitted to the receiving station and other space equipment.

  By providing the microwave power transmission unit 82, high-accuracy microwave beam control, high-power microwave power distribution, and high efficiency of the power transmission unit necessary for establishing the space solar power generation system 84 (solar cell) (Excluding total efficiency of 80% or more) and minimization of power transmission system weight (several g / W) can be satisfied.

It is a figure which shows the structure of the conventional power divider | distributor. It is a figure which shows the simulation model in the conventional power divider | distributor. It is a figure which shows the model parameter in the conventional power divider | distributor. It is a figure which shows the simulation result in the conventional power divider | distributor. 1 is a diagram illustrating a configuration of a power distributor according to a first embodiment. 3 is a diagram illustrating a simulation model in the power distributor according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating model parameters in the power distributor according to the first embodiment. It is a figure which shows the simulation result in the power divider | distributor concerning Embodiment 1. FIG. 6 is a diagram illustrating a configuration of an active integrated antenna including a power divider according to Embodiment 2. FIG. It is a figure which shows the structure of the space solar power generation system provided with the power divider | distributor concerning Embodiment 3. FIG.

Explanation of symbols

1 ... Waveguide (WRJ-6)
2, 21, 42, 51 ... Substrate 3, 22, 43, 52 ... Microstrip line 1
4, 23, 44, 53 ... microstrip line 2
5, 24, 45, 54 ... slot 1
6, 25, 46, 55 ... slot 2
20, 41, 50, 71, 71A, 71B ... Waveguide 26, 56 ... PORT1 (input)
27, 57 ... PORT2 (output)
28, 58 ... PORT3 (output)
70 ... Waveguide slot fed active integrated antenna 72 ... Microstrip line 73 ... Waveguide slot line 74A ... Feed section 74B ... Feed layer feed section 74C ... Feed layer 75 ... Patch antenna 76 on substrate ... Phase control layer 77 ... Active Device
78 ... Phase shifter 79 ... Antenna layer 80 ... Satellite body 81 ... Solar cell 82 ... Microwave power transmission unit 83 ... Power transmission antenna 84 ... Space solar power generation system 100 ... Antenna group

Claims (8)

Microstrip line,
A rectangular waveguide having a TE10 mode and having one end short-circuited;
Slots are provided in the tube wall perpendicular to the electric field direction of the waveguide,
The microstrip line is disposed on the slot;
A power divider in which the characteristic impedance of the waveguide is matched to the characteristic impedance of the microstrip line by adjusting the E-plane dimension and the H-plane dimension of the waveguide. The power divider according to claim 1, wherein
A power distributor in which power is supplied to the waveguide and the power is distributed at a predetermined frequency to the microstrip line through the slot with a coupling degree of 90% or more. The power divider according to claim 1 or 2,
The length of the slot is half the in-tube wavelength of the microwave input to supply power to the waveguide, and the microstrip line is disposed perpendicular to the center of the slot in the length direction. Distributor. The power divider according to any one of claims 1 to 3,
The waveguide has a heat dissipation structure,
A power distributor in which heat dissipation of the power distributor is performed by the heat dissipation structure. The power divider according to any one of claims 1 to 4,
A power distributor in which the power supplied to the waveguide has a reflectance of less than 1% reflected from an input port of the waveguide at a predetermined frequency. The power divider according to any one of claims 1 to 4,
The degree of coupling is defined as a ratio of power coupled to the microstrip line to transmitted power to the waveguide, and the degree of coupling is a flatness of 0.05 / GHz or less at 5 GHz to 7 GHz.   A waveguide slot-fed active integrated antenna comprising the power distributor according to claim 1.   A space solar power generation system comprising the power distributor according to any one of claims 1 to 6.

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