WO2017104680A1 - 遅波回路、および進行波管 - Google Patents
遅波回路、および進行波管 Download PDFInfo
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- WO2017104680A1 WO2017104680A1 PCT/JP2016/087133 JP2016087133W WO2017104680A1 WO 2017104680 A1 WO2017104680 A1 WO 2017104680A1 JP 2016087133 W JP2016087133 W JP 2016087133W WO 2017104680 A1 WO2017104680 A1 WO 2017104680A1
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- slow wave
- wave circuit
- beam hole
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- polygon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
- H01J23/28—Interdigital slow-wave structures; Adjustment therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
- H01J25/42—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/002—Manufacturing hollow waveguides
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- 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
- H01P3/12—Hollow waveguides
- H01P3/123—Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
Definitions
- the present invention relates to a slow wave circuit and a traveling wave tube, and more particularly, to a folded waveguide type slow wave circuit, an improvement of a traveling wave tube using the same, and an improvement in performance.
- This traveling wave tube is a slow wave circuit.
- a helix type slow wave circuit is mainly used.
- This helix-type slow wave circuit amplifies a high-frequency signal by allowing an electron beam to pass through a helix-type waveguide and causing an interaction between the high-frequency wave propagating through the waveguide and the electron beam.
- it consists of an electron gun that generates an electron beam, a slow wave circuit that causes the electron beam to interact with a high-frequency signal, and a collector that captures the electron beam after the interaction has ended (generally for traveling wave tubes).
- Non-Patent Document 1 there is Non-Patent Document 1.
- the wavelength is shortened, so that it is necessary to refine the slow wave circuit.
- IPP Integrated Pole Piece
- the helix is supported and fixed by a dielectric support rod, and a permanent magnet is disposed to form a periodic magnetic field device. It is difficult to assemble a helix miniaturized with high frequency using a complex structure such as IPP with high accuracy.
- a folded waveguide type slow wave circuit is used in the terahertz wave band. This is because the folded waveguide type slow wave circuit is suitable for manufacturing by a MEMS (Micro Electro Mechanical Systems) manufacturing technique or a lithography technique.
- the folded waveguide type slow wave circuit is realized by a combination of a folded waveguide through which a high frequency passes and a beam hole through which an electron beam passes.
- the cross-sectional shape of the beam hole of the folded waveguide slow wave circuit is ideally circular. This circular beam hole can be easily manufactured by precise machining in a folded waveguide type slow wave circuit used in a low frequency band. Usually, a slow wave circuit is divided, machined, and assembled to complete (Non-Patent Document 1).
- the wavelength decreases as the frequency increases from microwaves to terahertz waves.
- miniaturization of the waveguide is required.
- As a manufacturing technique for miniaturizing a folded waveguide it becomes difficult to apply a machining technique. Therefore, manufacturing using a lithography technique or the like is performed (Patent Document 1).
- LIGA Lithographie Galvanoformung Abformung
- X-rays sinchrotron light
- Non-Patent Document 2 When forming a beam hole with a circular cross-section using such a microfabrication technique, the number of manufacturing masks increases in order to faithfully reproduce the curve, the manufacturing process becomes complicated, and the yield decreases. is there. Therefore, the folded waveguide type slow wave circuit of the background art is manufactured with the beam hole having a quadrangular cross-sectional shape (Non-Patent Document 2).
- the above-described folded waveguide type slow wave circuit has the following problems.
- the cross-sectional shape of the beam hole of the folded waveguide slow wave circuit becomes a quadrangle
- the electric field distribution becomes uneven in the space around the apex of the quadrangle, which affects the convergence of the electron beam.
- the cross-sectional area of the rectangular beam hole is increased and the electron beam is allowed to pass only near the center of the beam hole, the influence of the electric field near the apex of the beam hole can be reduced. This means that the beam hole through which the electron beam passes does not necessarily become smaller as the frequency increases.
- the size ratio of the beam hole intersecting with the folded waveguide increases because the size is reduced in accordance with the scaling rule, and the dimensional design margin decreases. This requires high dimensional accuracy. Furthermore, the frequency band in which the traveling wave tube has an amplifying action is narrowed by narrowing the frequency band in which the electron beam and the high frequency interact.
- An object of the present invention is to provide a slow wave circuit and a traveling wave tube which are suitable for processing and miniaturization of a beam hole and suitable for high frequency.
- a slow wave circuit includes a meandering waveguide and a beam hole passing through the meandering waveguide, and a cross-sectional shape in a direction perpendicular to the longitudinal direction of the beam hole. Is a polygon having more sides than a rectangle.
- a traveling wave tube includes an electron gun that generates an electron beam, a slow wave circuit that causes the electron beam to interact with a high-frequency signal, a collector that captures the electron beam after completion of the interaction,
- the slow wave circuit includes a meander-shaped waveguide and a beam hole passing through the meander-shaped waveguide, and a cross-sectional shape in a direction perpendicular to the longitudinal direction of the beam hole is a polygon having more sides than a quadrangle. It is characterized by being.
- the present invention can realize a slow wave circuit and a traveling wave tube suitable for high frequency while facilitating the miniaturization of the beam hole.
- FIG. 1 It is a disassembled perspective view for demonstrating the folding waveguide type slow wave circuit by one Embodiment of this invention. It is an enlarged view of the a part of the slow wave circuit component of FIG. (A) is an exploded sectional view for explaining a configuration of a slow wave circuit component according to an embodiment of the present invention, and (b) shows an internal angle ⁇ of a beam hole of the slow wave circuit component according to an embodiment of the present invention. It is sectional drawing for demonstrating. (A) is a cross-sectional view taken along line bb of the slow wave circuit component of FIG. 2, and (b) is a cross sectional view taken along line cc of the slow wave circuit component of FIG.
- FIG. 2 is an overview diagram for explaining an internal structure of a traveling wave tube using a folded waveguide-type slow wave circuit according to an embodiment of the present invention and a high-voltage power supply module that supplies a voltage to the traveling wave tube.
- FIG. 3 is a schematic view for explaining a folded wave guide type slow wave circuit of a traveling wave tube and a periodic magnetic field device according to an embodiment of the present invention. It is a graph which shows the comparison of the cross-sectional shape of a beam hole, and the performance of a slow wave circuit. It is a graph which shows the comparison of the performance of a hexagonal shape and a slow wave circuit. It is a graph which shows the relationship between the cross-sectional shape of a beam hole, and the gain of a slow wave circuit.
- FIG. 1 is an exploded perspective view for explaining a folded waveguide-type slow wave circuit according to an embodiment of the present invention.
- FIG. 2 is an enlarged view of a part of the slow wave circuit component of FIG.
- FIG. 3A is an exploded sectional view for explaining the configuration of the slow wave circuit component according to the embodiment of the present invention
- FIG. 3B is a beam hole of the slow wave circuit component according to the embodiment of the present invention. It is sectional drawing for demonstrating interior angle (alpha) of this.
- FIG. 6 is a cross-sectional view of a slow wave circuit component of a comparative example.
- FIG. 1 is an example of a folded waveguide-type slow wave circuit 10 and shows a case where a plurality of parts are assembled and configured.
- a folded waveguide 1 and a beam hole 2 are formed in the plate-like slow wave circuit component 4.
- the plate-like slow wave circuit component 4 By assembling two such plate-like slow wave circuit components 4 together, it can be operated as a folded waveguide slow wave circuit.
- the plate-like slow wave circuit component 4 is sandwiched between the semicircular components 9 in the cross section, and the overall cylindrically-shaped folded waveguide slow wave circuit 10 is configured.
- the folded waveguide slow wave circuit 10 is inserted into a traveling wave tube periodic magnetic field device which will be described later.
- a high frequency signal is introduced from the input / output waveguide 3 to the folded waveguide 1, the electron beam is passed through the beam hole 2, and the high frequency signal and the electron beam propagating through the folded waveguide 1 are transmitted.
- This interaction causes the traveling wave tube to amplify the high frequency signal.
- the folded waveguide type slow wave circuit 10 of the present embodiment is a folded waveguide type slow wave circuit, a folded waveguide 1 as an example of a meander-shaped waveguide, and a beam hole 2 that penetrates the folded waveguide 1.
- the cross-sectional shape in the direction perpendicular to the longitudinal direction of the beam hole 2 is a polygon having more sides than a quadrangle.
- FIG. 2 shows an example of the beam hole 2 created by the UV LIGA technology or the like.
- a folded waveguide 1 is formed as a meandering groove on the surface of the slow wave circuit component, and the beam hole 2 is formed as a linear groove so as to penetrate the folded waveguide 1. ing.
- the beam hole 2 of the folded waveguide type slow wave circuit 10 of the present embodiment has a larger number of sides than a square in the cross-sectional shape in the direction perpendicular to the longitudinal direction of the beam hole 2.
- An example of a square is a hexagon.
- FIG. 3B shows an example in which the folded waveguide type slow wave circuit 10 is divided into a plurality of plate-like parts. However, if the LIGA technology is used, it can be formed integrally without being divided. It is.
- the plate-like slow wave circuit component 4 includes a plate-like slow wave circuit component 4a and a plate-like slow wave circuit component 4b.
- the plate-like slow wave circuit component 4 a is formed with a linear groove portion 5 a that becomes the beam hole 2 and a meander groove portion 6 a that becomes the folded waveguide 1.
- the plate-like slow wave circuit component 4 b is formed with a linear groove 5 b that becomes the beam hole 2 and a meander groove 6 b that becomes the folded waveguide 1.
- the groove portions 5a of the pair of slow wave circuit components 4a and the groove portions 5b of the slow wave circuit components 4b are overlapped, and the cross-sectional shape in the direction perpendicular to the longitudinal direction is six.
- a square beam hole 2 is formed.
- the groove 6a of the pair of slow wave circuit components 4a and the groove 6b of the slow wave circuit components 4b are overlapped to constitute a meander-shaped folded waveguide 1. .
- FIG. 3 (b) in the beam hole 2 of the folded waveguide type slow wave circuit 10 of the present embodiment, a hexagon is formed so that the vertex is located in the direction in which the folded waveguide 1 crosses the beam hole 2.
- FIG. 4A shows a cross section of the plate-like slow wave circuit component shown in FIG. 2 assembled at a position along the line bb.
- FIG. 4B shows a plate-like slow wave circuit.
- FIG. 4 (c) shows a cross-section taken along the line dd, with a cross section taken along the line cc.
- FIG. 4 (c) shows a cross-section taken along the line dd. It is drawn in position.
- FIG. 5A to FIG. 5C are cross-sectional views for explaining modifications of the cross-sectional shape of the beam hole of the slow wave circuit component according to the embodiment of the present invention.
- FIG. 5A shows a case where the cross-sectional shape of the beam hole is a regular hexagon.
- a regular hexagon is formed such that the side of the folded waveguide 1 is positioned in a direction crossing the beam hole 2a.
- 5 (b) and 5 (c) show a case where the cross-sectional shape of the beam hole is an octagon, and particularly a case where it is a regular octagon.
- a regular octagon is formed such that the side of the folded waveguide 1 is positioned in a direction crossing the beam hole 2b.
- a regular octagon is formed such that the apex is located in the direction in which the folded waveguide 1 crosses the beam hole 2c.
- a polygon having a line symmetry is selected as a polygon having a larger number of sides than the above-described rectangle. ing.
- the polygonal shape is such that the cross-sectional shape of the beam hole 2 is axisymmetric in the first direction and is different from the first direction.
- Manufacture is easy if the polygonal shape and arrangement are symmetrical in two directions. More specifically, from the viewpoint of manufacturing difficulty, a cross-sectional shape or arrangement that is line symmetric in the vertical direction as an example of the first direction and that is line symmetric in the horizontal direction as an example of the second direction is preferable.
- the cross-sectional shape of the beam hole 2 having such symmetry is a hexagonal beam hole 2 shown in FIG. 3B or an octagonal beam hole 2b shown in FIG. 5B. is there.
- the hexagonal shape and arrangement shown in FIG. Of the polygons having more sides than the quadrangle, the hexagon has the smallest number of sides. It can be seen that the hexagon is an advantageous shape because the smaller the number of sides, the easier the manufacturing.
- FIG. 7 is a general view for explaining a traveling wave tube using a folded waveguide type slow wave circuit according to an embodiment of the present invention.
- FIG. 8 is a general view for explaining the internal structure of a traveling wave tube using a folded waveguide slow wave circuit according to an embodiment of the present invention and a high voltage power supply module for supplying a voltage to the traveling wave tube. .
- the traveling wave tube shown in FIGS. 7 and 8 includes an electron gun 11 that generates an electron beam, a slow wave circuit according to the above-described embodiment, and a slow wave circuit that interacts an electron beam and a high-frequency signal. And a collector 14 for capturing the electron beam after the interaction is completed.
- the traveling wave tube of FIG. 7 further includes an input / output unit 12 that inputs and outputs the high-frequency signal, a magnetic field focusing device that is disposed in the vicinity of the slow wave circuit and suppresses the spread of the electron beam that travels through the slow wave circuit, Further included.
- an RF (Radio-Frequency) input is input and an RF output is output.
- the magnetic field focusing device examples include a permanent magnet, an electromagnet, or a periodic magnetic field device that generates a periodic magnetic field that suppresses the spread of the electron beam traveling through a slow wave circuit.
- a periodic magnetic field device 13 that generates a periodic magnetic field that suppresses the spread of the electron beam traveling through the slow wave circuit is used as an example of the magnetic field focusing device.
- the traveling wave tube operates by receiving a voltage necessary for operation from the high voltage power supply module 15.
- the above-described folded waveguide slow wave circuit 10 is inserted into the periodic magnetic field device 13 as shown in FIG.
- the entire structure in which the above-described folded waveguide slow wave circuit 10 is inserted into the periodic magnetic field device 13 may be referred to as a slow wave circuit.
- FIG. 6 is a cross-sectional view of a slow wave circuit component of a comparative example of the present invention.
- a pair of slow wave circuit components 104 forms a beam hole 102 and a folded waveguide 101.
- the beam hole 102 in FIG. 6 has a quadrangular cross-sectional shape. While the beam hole 102 having a quadrangular cross-sectional shape is easy to manufacture, the length in the diagonal direction becomes long. Therefore, the separation of the beam hole from the ideal circle is increased, the beam hole is unnecessarily enlarged, and the frequency band in which the electron beam and the high frequency interact is narrowed. In the traveling wave tube using such a slow wave circuit component of the comparative example, the frequency band having an amplifying action is narrowed.
- FIG. 10 is a graph comparing the performance of the slow wave circuit when the cross-sectional shape of the beam hole is changed.
- the A line in FIG. 10 is the case where the cross-sectional shape of the beam hole is a hexagon, the B line is an octagon, the C line is a circle, and the D line is a square.
- the horizontal axis of the graph is the frequency, for example, a frequency around 300 GHz.
- the vertical axis represents the phase velocity Vp of electrons passing through the beam hole, and is dimensionless at the speed of light c. If the flat portion of the graph is wide, it indicates that an electron beam and high frequency can be interacted in a wide frequency band. In the case of a circle (C line), it can be seen that there are many flattened portions, and a traveling wave tube with a wide bandwidth can be realized.
- the quadrilateral has a larger overall inclination than the circular shape, and the separation from the circular shape is particularly large after 280 GHz.
- the hexagonal shape (A line) and the octagonal shape (B line) are close to a circle. Therefore, when the cross-sectional shape in the direction perpendicular to the longitudinal direction of the beam hole is changed from FIG. 10 to a polygon having more sides than the quadrangle, in other words, the number of sides is increased from the quadrangle, the performance of the slow wave circuit is improved.
- the difference between the hexagon and the octagon is small. Since it is easier to manufacture when the number of sides is smaller, it can be seen that the hexagonal shape is more advantageous than the octagonal shape.
- FIG. 11 is a graph showing a comparison between the hexagonal shape and the performance of the slow wave circuit.
- FIG. 11 shows the calculation result of the phase velocity Vp performed by changing the inner angle ⁇ of the beam hole 2 in FIG.
- the vertical axis represents the phase velocity Vp of electrons passing through the beam hole and is dimensionless at the speed of light c.
- 3B has a hexagonal cross-sectional shape in a direction perpendicular to the longitudinal direction. This is a calculation result of the phase velocity obtained by changing the internal angle ⁇ of the beam hole 2 in FIG. 3B in the hexagonal beam hole 2 having such a cross-sectional shape.
- Line A is the case where the internal angle ⁇ is 120 degrees and the cross-sectional shape is a regular hexagon.
- the B line is when the interior angle ⁇ in FIG. 3B is 160 degrees, the C line is 140 degrees, and the D line is 100 degrees. It is expected that the regular hexagon is closest to a circle and the electron beam transmission characteristics are good, but there is no significant difference when the internal angle ⁇ is 140 degrees.
- FIG. 12 is a graph showing the relationship between the cross-sectional shape of the beam hole and the gain of the slow wave circuit.
- the A line is a hexagon with an internal angle ⁇ of 140 degrees
- the B line is a regular hexagon
- the C line is an octagon
- the D line is a circle
- the E line is a square.
- the target gain is 20 dB
- the frequency is around 290 GHz
- the frequency bandwidth of about 10 GHz exceeds 20 dB. If this frequency band width is 1, the regular octagon is 0.7
- the regular hexagon is 0.6
- the hexagon having ⁇ of 140 degrees is 0.6
- the square is 0.2.
- the metal is deposited so as to be laminated in the vertical direction in FIG. 2, so that a cross-sectional shape having a large angle ⁇ and close to a quadrangle becomes easier. From the above, it can be seen that it is advantageous to use a hexagonal shape in which the internal angle ⁇ is larger than 120 degrees. In other words, it is advantageous to use a beam hole having a cross-sectional shape in which the internal angle ⁇ formed by the sides on both sides of one vertex of the hexagon is larger than 120 degrees.
- a polygon whose cross-sectional shape in the direction perpendicular to the longitudinal direction of the beam hole has a larger number of sides than a square may have such a shape as a whole.
- the present invention includes those in which each corner constituting the polygonal shape of the beam hole is blunt and has a smooth surface due to manufacturing variations, processing accuracy, and changes over time. It goes without saying that various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention.
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Abstract
Description
前記遅波回路は、ミアンダ状の導波路と、上記ミアンダ状の導波路を貫くビームホールとを含み、上記ビームホールの長手方向に垂直な方向の断面形状が四角形より辺の数が多い多角形であることを特徴とする。
本発明の一実施形態による折り畳み導波路形遅波回路、及び進行波管について、説明する。図1は、本発明の一実施形態による折り畳み導波路形遅波回路を説明するための分解斜視図である。図2は、図1の遅波回路部品のa部の拡大図である。図3(a)は本発明の一実施形態の遅波回路部品の構成を説明するための分解断面図であり、図3(b)は本発明の一実施形態の遅波回路部品のビームホールの内角αを説明するための断面図である。図6は、比較例の遅波回路部品の断面図である。
図1は、折り畳み導波路形遅波回路10の一例であり、複数の部品を組み立てて構成する場合を示す。板状の遅波回路部品4には折り畳み導波路1とビームホール2が形成されている。このような板状の遅波回路部品4を2枚重ねて組み立てることにより、折り畳み導波路形遅波回路として動作させることができる。さらに断面が半円状部品9で板状の遅波回路部品4を挟むようにして、全体として円柱状の折り畳み導波路形遅波回路10を構成する。この折り畳み導波路形遅波回路10は、後で説明する進行波管の周期磁界装置の中に挿入される。
ビームホール2の長手方向に垂直な方向の断面形状を四角形より辺の数が多い多角形とすることにより、ビームホールの断面形状が四角形のものと比較して、遅波回路の性能を改善することができる。
以下、断面形状を四角形より辺の数が多い多角形の具体例やその配置について、詳細に説明する。図2はUV LIGA技術等で作成したビームホール2の例を示す。図2に示すように、遅波回路部品の表面には、ミアンダ状の溝として折り畳み導波路1が形成されており、ビームホール2は折り畳み導波路1を貫くように直線上の溝として形成されている。
図10は、ビームホールの断面形状を変えた場合の遅波回路の性能を比較したグラフである。図10のA線はビームホールの断面形状が六角形の場合、B線は八角形の場合、C線は円形の場合、そしてD線は四角形の場合である。グラフの横軸は周波数であり、例として300GHz前後の周波数とした。縦軸はビームホール内を通過する電子の位相速度Vpであり、光速cで無次元化されている。グラフが平坦な部分が広いと、広い周波数帯で電子ビームと高周波の相互作用が可能であることを示す。円形の場合(C線)が最も平坦な部分が多く、広い帯域幅の進行波管を実現できることが分かる。
図11は、六角形の形状と遅波回路の性能の比較を示すグラフである。図11は、図3(b)のビームホール2の内角αを変えて行った位相速度Vpの計算結果を示す。図11では図10と同様に、縦軸はビームホール内を通過する電子の位相速度Vpであり、光速cで無次元化されている。図3(b)のビームホール2は、その長手方向に垂直な方向の断面形状が六角形である。このような断面形状が六角形のビームホール2において、図3(b)のビームホール2の内角αを変えて行った位相速度の計算結果である。A線は内角αが120度であり、断面形状が正六角形の場合である。B線は図3(b)の内角αが160度の場合、C線は140度の場合、D線は100度の場合である。正六角形が円形に最も近く、電子ビームの透過特性が良いことが予想されるが、内角αが140度の場合も大きな差がないことが分かる。
図12は、ビームホールの断面形状と遅波回路の利得との関係を示すグラフである。A線は内角αが140度の六角形の場合、B線は正六角形の場合、C線は八角形の場合、D線は円形の場合、そしてE線は四角形の場合である。目標利得を20dBとすると、円形の場合は290GHz前後の周波数で、10GHz程度の周波数帯幅で20dBを超えていることが分かる。この周波数帯幅を1とすると、正八角形は0.7、正六角形は0.6、αが140度の六角形は0.6、四角形は0.2である。LIGA製造技術等により製造する場合は、図2の上下方向に積層するようにして金属を析出させるので、角度αが大きく四角形に近い断面形状の方が容易となる。以上より、内角αを120度よりも大きくした六角形とすることが有利であることが分かる。言い換えると、六角形の一つの頂点の両側の辺が作る内角αが120度よりも大きい断面形状のビームホールとすることが有利である。
2、2a、2b、2c ビームホール
3 入出力導波路
4、4a、4b 遅波回路部品
5a、5b、6a、6b 溝部
9 半円状部品
10 折り畳み導波路形遅波回路
11 電子銃
12 入出力部
13 周期磁界装置
14 コレクタ
15 高電圧電源モジュール
Claims (10)
- ミアンダ状の導波路と、前記ミアンダ状の導波路を貫くビームホールとを含み、
前記ビームホールの長手方向に垂直な方向の断面形状が四角形より辺の数が多い多角形であることを特徴とする、遅波回路。 - 前記導波路が前記ビームホールを横切る方向に頂点が位置するように前記多角形が形成されている、請求項1に記載の遅波回路。
- 前記多角形は、前記ビームホールの断面形状が第1方向で線対称であり、かつ前記第1方向とは異なる第2方向で線対称である、請求項1に記載の遅波回路。
- 前記多角形の頂点の両側の辺が作る内角は120度よりも大きい、請求項1乃至請求項3のいずれか一項に記載の遅波回路。
- 前記多角形は六角形である、請求項1乃至請求項4のいずれか一項に記載の遅波回路。
- 前記多角形は正六角形である、請求項1乃至請求項5のいずれか一項に記載の遅波回路。
- 前記多角形は八角形である、請求項1乃至請求項4のいずれか一項に記載の遅波回路。
- 前記ビームホールを進行する前記電子ビームの広がりを抑制する磁界集束装置をさらに含む、請求項1乃至請求項7のいずれか一項に記載の遅波回路。
- 電子ビームを発生させる電子銃と、
前記請求項1乃至請求項7のいずれか一項に記載の遅波回路であって、前記電子ビ-ムと高周波信号とを相互作用させる遅波回路と、
相互作用終了後の電子ビ-ムを捕捉するコレクタとを含むことを特徴とする、進行波管。 - 前記遅波回路の近傍に配置され、前記遅波回路を進行する前記電子ビームの広がりを抑制する磁界集束装置をさらに含む、請求項9に記載の進行波管。
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EP16875657.5A EP3392899B1 (en) | 2015-12-18 | 2016-12-14 | Slow wave circuit and traveling wave tube |
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CN108475605A (zh) | 2018-08-31 |
JP6619447B2 (ja) | 2019-12-11 |
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EP3392899A1 (en) | 2018-10-24 |
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