JP2019106681A - Connector and connector coplanar waveguide - Google Patents

Connector and connector coplanar waveguide Download PDF

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JP2019106681A
JP2019106681A JP2017239944A JP2017239944A JP2019106681A JP 2019106681 A JP2019106681 A JP 2019106681A JP 2017239944 A JP2017239944 A JP 2017239944A JP 2017239944 A JP2017239944 A JP 2017239944A JP 2019106681 A JP2019106681 A JP 2019106681A
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conductor
connector
line
inner conductor
pair
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JP6907918B2 (en
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斉 脇田
Hitoshi Wakita
斉 脇田
荒武　淳
Atsushi Aratake
淳 荒武
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Nippon Telegraph and Telephone Corp
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Abstract

To provide a connector with an excellent mountability, while suppressing the deterioration of a transmission characteristic of a high frequency signal.SOLUTION: A connector 100 comprises: an outer conductor 101; an inner conductor 102 distributed in a penetration whole of the outer conductor 101, extended to an axial direction, and in which a cross section vertical to the axial direction is formed in a circular shape with an axis as a center; a dielectric layer 103 provided between the inner conductor 102 and the outer conductor 101; and a pair of electrodes 104 projected along the axial direction from an end surface of the outer conductor 101, formed separated from each other; and electrically connected to the outer conductor 101. The inner conductor 102 includes a tip part 102a extended to the axial direction from the end surface of the outer conductor 101. The pair of electrodes 104 is provided while nipping the tip part 102a, and a distance from a side surface of the tip part 102a side of each of the pair of electrodes 104 to the axis is larger than a radius of the cross section of the inner conductor 102 and is smaller than the distance from the axis to the outer conductor 101.SELECTED DRAWING: Figure 1C

Description

本発明は、コネクタおよびコネクタ平面線路接続構造に関し、特に高周波信号を伝送する同軸線路と平面線路とを接続するコネクタに関する。   The present invention relates to a connector and a connector flat line connection structure, and more particularly to a connector for connecting a coaxial line transmitting a high frequency signal to a flat line.

従来から、マイクロ波帯やミリ波帯の高周波信号を伝送するための高周波伝送線路として、同軸線路やマイクロストリップ線路などの平面線路が知られている。マイクロストリップ線路は、平面構造を有する多層基板で構成され、表層に高周波信号を伝送する線路と、その下層に高周波信号に対する接地導体面を有する。   Conventionally, flat lines such as coaxial lines and microstrip lines are known as high-frequency transmission lines for transmitting high-frequency signals in the microwave band and the millimeter wave band. The microstrip line is formed of a multilayer substrate having a planar structure, and has a line for transmitting a high frequency signal to the surface layer, and a ground conductor plane for the high frequency signal below it.

実際の高周波モジュールやパッケージなどにおいては、マイクロストリップ線路などの多層基板のみで構成されることはなく、信号入出力部に同軸線路とマイクロストリップ線路とを接続するコネクタが必要となる。   In an actual high frequency module and package, etc., it is not composed only of a multilayer substrate such as a microstrip line, but a connector for connecting the coaxial line and the microstrip line to the signal input / output part is required.

従来のコネクタとして、マイクロストリップ線路の多層基板の端部に搭載されるエッジマウント型のコネクタが知られている。このようなエッジマウント型のコネクタでは、高周波信号線路の接続、および接地導体間の接続を確実に行い、同軸線路からマイクロストリップ線路へ伝搬モードをスムーズに変換することが重要となる。   As a conventional connector, an edge mount type connector mounted on an end of a multilayer substrate of a microstrip line is known. In such an edge mount type connector, it is important to securely connect the high frequency signal line and the connection between the ground conductors and smoothly convert the propagation mode from the coaxial line to the microstrip line.

接地導体間の接続が不十分であると、信号に対するリタン電流が大きく迂回、もしくは断絶されることになり、周波数特性にディップを生じるなど特性劣化の要因となる。また、伝搬モードの変換がスムーズに行われない場合、伝搬モードが変換される部分で寄生容量が発生し、特性インピーダンスにずれが生じ、信号が反射してしまう可能性がある。   If the connection between the ground conductors is insufficient, the return current to the signal is largely diverted or disconnected, which causes the characteristic deterioration such as a dip in the frequency characteristic. In addition, when the conversion of the propagation mode is not smoothly performed, parasitic capacitance is generated at the portion where the propagation mode is converted, and the characteristic impedance may be deviated, and the signal may be reflected.

例えば、特許文献１は、同軸線路と平面線路とを接続するエッジマウント型のコネクタ５００を開示している。図５に示すように、特許文献１のコネクタ５００は、コネクタ５００側の接地導体５０１とコプレナ線路６００側の接地導体６０２とを電気的に接続するための突起５０５を有する。また、特許文献１では、コネクタ５００側のＲＦ信号線５０３に切欠き形状を設けることでコネクタ５００側の同軸線路５０２の伝搬モード（以下、「同軸モード」という。）から、コプレナ線路６００側の伝搬モード（以下、「コプレナモード」という。）に連続的に移行する。   For example, Patent Document 1 discloses an edge mount type connector 500 for connecting a coaxial line and a flat line. As shown in FIG. 5, the connector 500 of Patent Document 1 has a protrusion 505 for electrically connecting the ground conductor 501 on the connector 500 side and the ground conductor 602 on the coplanar line 600 side. Further, in Patent Document 1, by providing a notch shape in the RF signal line 503 on the connector 500 side, the propagation mode (hereinafter referred to as “coaxial mode”) of the coaxial line 502 on the connector 500 side is provided on the coplanar line 600 side. Transition to the propagation mode (hereinafter referred to as "coplanar mode") continuously.

図６に示すように、同軸線路５０２の断面における電界は、ＲＦ信号線５０３から対称に外部の導体に分布した同軸モードの分布となっている（図６（ａ））。切欠き形状が設けられたＲＦ信号線５０３の端部５０４の断面での電界は、下方と横方向での密度が高く、端部５０４の切欠き形状が設けられた部分での密度が低い分布となっている（図６（ｂ））。さらに、コプレナ線路６００の断面で見た電界は、線路導体６０１から接地導体６０２への横方向の密度が高いコプレナモードの電界分布となっている（図６（ｃ））。   As shown in FIG. 6, the electric field at the cross section of the coaxial line 502 is a distribution of coaxial modes distributed symmetrically to the external conductor from the RF signal line 503 (FIG. 6 (a)). The electric field at the cross section of the end 504 of the RF signal line 503 provided with the notch shape has a high density in the lower and lateral directions, and a low density distribution at the portion where the notch shape of the end 504 is provided. (FIG. 6 (b)). Furthermore, the electric field seen in the cross section of the coplanar line 600 is a coplanar mode electric field distribution in which the density in the lateral direction from the line conductor 601 to the ground conductor 602 is high (FIG. 6 (c)).

しかし、特許文献１のコネクタ５００では、コプレナ線路６００上の接地導体６０２や線路導体６０１の厚さが一般的に数μｍ〜数十μｍであるのに対して、コネクタ５００側の接地導体である突起５０５の鉛直方向の高さは０．１ｍｍ〜数ｍｍと比較的高く、特性インピーダンスの設計が容易ではない。   However, in the connector 500 of Patent Document 1, while the thicknesses of the ground conductor 602 and the line conductor 601 on the coplanar line 600 are generally several μm to several tens of μm, they are the ground conductors on the connector 500 side. The height in the vertical direction of the protrusion 505 is as relatively high as 0.1 mm to several mm, and the design of the characteristic impedance is not easy.

また、一般的に、従来のコネクタにおいては、基板上の接地導体のパタンを広げることで特性インピーダンスの調整が行われているが、従来のコネクタが実際にコプレナ線路などの平面線路に実装される際には半田などの導体材料を用いて実装されるため、半田量によっては特性インピーダンスに影響を与える場合がある。   Also, in general, in the conventional connector, adjustment of the characteristic impedance is performed by widening the pattern of the ground conductor on the substrate, but the conventional connector is actually mounted on a flat line such as a coplanar line In that case, since it mounts using conductor materials, such as a solder, depending on the amount of solders, it may affect a characteristic impedance.

特許文献１に記載のコネクタ５００においては、図５に示すように、特性インピーダンスの調整に伴ってコプレナ線路６００の線路導体６０１との間隔が広げられている。コネクタ５００側の突起５０５は、ＲＦ信号線５０３の位置からは離れた方向に位置するコプレナ線路６００の接地導体６０２の上面に、半田によって接続される。そのため、半田量によっては、フィレットが形成される場合があり、特性インピーダンスが不定となる可能性が除去できない。   In the connector 500 described in Patent Document 1, as shown in FIG. 5, the distance between the coplanar line 600 and the line conductor 601 is widened along with the adjustment of the characteristic impedance. The protrusion 505 on the connector 500 side is connected by solder to the top surface of the ground conductor 602 of the coplanar line 600 located in the direction away from the position of the RF signal line 503. Therefore, depending on the amount of solder, a fillet may be formed, and the possibility of the characteristic impedance becoming unstable can not be removed.

また、特許文献１のコネクタ５００では、コネクタ５００側における同軸モードからコプレナ線路６００側のコプレナモードにスムーズに移行するために、コネクタ５００のＲＦ信号線５０３に半月状の切欠き構造を設けている。   Further, in the connector 500 of Patent Document 1, in order to smoothly shift from the coaxial mode on the connector 500 side to the coplanar mode on the coplanar line 600 side, a semi-circular notch structure is provided in the RF signal line 503 of the connector 500.

しかし、一般的に高周波伝送線路におけるコネクタでは、この同軸線路のＲＦ信号線の径自体が０．２ｍｍ〜０．３ｍｍ（例えば、Ｇ３ＰＯ（登録商標）やｍｉｃｒｏ Ｓｗｉｔｃｈｅｄ Ｍｏｄｅ Ｐｏｗｅｒ Ｓｕｐｐｌｙ（ｍｉｃｒｏＳＭＰＳ)コネクタなど）と微細な構造である。そのため、従来のコネクタ５００では、ＲＦ信号線５０３に切欠き構造を設けることが困難な場合があり、製造トレランスや実装性を担保できなくなる恐れがある。   However, in general, in a connector in a high frequency transmission line, the diameter itself of the RF signal line of the coaxial line is 0.2 mm to 0.3 mm (for example, G3PO (registered trademark) or micro Switched Mode Power Supply (micro SMPS) connector) And a fine structure. Therefore, in the conventional connector 500, it may be difficult to provide the notch structure in the RF signal line 503, and there is a possibility that the manufacturing tolerance and the mountability can not be secured.

特開２０１０−１９２９８７号公報Unexamined-Japanese-Patent No. 2010-192987

本発明は、上述した課題を解決するためになされたものであり、高周波信号の伝送特性の劣化を抑えつつ、実装性に優れたコネクタを提供することを目的とする。   The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a connector having excellent mountability while suppressing deterioration of transmission characteristics of high frequency signals.

上述した課題を解決するために、本発明に係るコネクタは、軸方向に延伸した円筒状の貫通孔を有する外部導体と、前記外部導体の前記貫通孔内に配設され、前記軸方向に延伸し、その軸方向に垂直な断面が軸を中心とした円形に形成された内部導体と、前記内部導体と前記外部導体との間に設けられた誘電体層と、前記外部導体の端面から前記軸方向に沿って突出し、互いに離間して形成され、それぞれ前記外部導体と電気的に接続された一対の電極と、を備え、前記内部導体は、前記外部導体の前記端面から前記軸方向に延出した先端部を有し、前記一対の電極は、前記先端部を挟むように設けられ、前記一対の電極それぞれの前記先端部側の側面から前記軸までの距離は、前記内部導体の前記断面の半径より大きく、かつ、前記軸から前記外部導体までの距離より小さいことを特徴とする。   In order to solve the problems described above, the connector according to the present invention is disposed in the outer conductor having an axially extending cylindrical through hole and the through hole of the outer conductor, and extends in the axial direction. From the end face of the outer conductor, a dielectric layer provided between the inner conductor and the outer conductor, and an inner conductor formed in a circular shape with a cross section perpendicular to the axial direction centered on the axis; And a pair of electrodes protruding along an axial direction and formed apart from each other and electrically connected to the outer conductor, the inner conductor extending in the axial direction from the end face of the outer conductor The pair of electrodes are provided so as to sandwich the tip, and the distance from the side surface on the tip side of each of the pair of electrodes to the shaft is the cross section of the inner conductor. Greater than the radius of the And it is smaller than the distance to Kigaibu conductor.

また、本発明に係るコネクタにおいて、前記一対の電極それぞれの前記内部導体側の前記側面は、前記軸方向から見て、前記内部導体の側面と同心円状に形成されていてもよい。   Further, in the connector according to the present invention, the side surface on the inner conductor side of each of the pair of electrodes may be formed concentrically with the side surface of the inner conductor when viewed from the axial direction.

また、本発明に係るコネクタにおいて、前記一対の突起部の前記内部導体側の前記側面は前記軸から離れる方向に凹んだ形状を有していてもよい。   Further, in the connector according to the present invention, the side surfaces on the inner conductor side of the pair of protrusions may have a shape which is recessed in a direction away from the shaft.

また、本発明に係るコネクタ平面線路接続構造は、コネクタと平面線路とのコネクタ平面線路接続構造であって、前記コネクタは、上述したコネクタであり、前記平面線路は、誘電体からなる基板と、前記基板の表面に配設された線路導体と、前記線路導体の両側にそれぞれ前記線路導体から離間して前記基板の表面に配設された一対の接地導体と、前記基板の内部に設けられた内部接地導体と、を備え、前記コネクタの前記先端部は、前記平面線路の前記線路導体と接続され、前記コネクタの前記一対の電極のそれぞれは、前記平面線路の前記一対の接地導体のそれぞれと接続され、前記コネクタの前記一対の電極の前記内部導体側の側面は、前記軸方向から見て、前記平面線路の前記一対の接地導体の前記線路導体側の端部より前記線路導体側に位置していることを特徴とする。   A connector flat line connection structure according to the present invention is a connector flat line connection structure of a connector and a flat line, wherein the connector is the above-mentioned connector, and the flat line is a substrate made of a dielectric. A line conductor disposed on the surface of the substrate, and a pair of ground conductors disposed on the surface of the substrate at both sides of the line conductor and provided on the surface of the substrate, and provided inside the substrate An inner ground conductor, the tip of the connector is connected to the line conductor of the flat line, and each of the pair of electrodes of the connector is connected to each of the pair of ground conductors of the flat line. The side surfaces of the pair of electrodes of the connector, which are connected, on the inner conductor side are closer to the line conductor than the end portions on the line conductor side of the pair of ground conductors of the flat line when viewed from the axial direction And it is located in the body side.

本発明によれば、外部導体の端面から延出した内部導体の先端部を挟んで、互いに所定の距離で離間して外部導体の端面から突出して形成された一対の電極を備えるので、高周波信号の伝送特性の劣化を抑えつつ、実装性に優れたコネクタを実現することができる。   According to the present invention, the high-frequency signal is provided with a pair of electrodes formed to project from the end face of the outer conductor at a predetermined distance apart from each other with the tip of the inner conductor extending from the end face of the outer conductor. It is possible to realize a connector with excellent mountability while suppressing the deterioration of the transmission characteristics of the above.

図１Ａは、本発明の第１の実施の形態係るコネクタの平面図である。FIG. 1A is a plan view of a connector according to a first embodiment of the present invention. 図１Ｂは、本発明の第１の実施の形態に係るコネクタの側面図である。FIG. 1B is a side view of the connector according to the first embodiment of the present invention. 図１Ｃは、図１ＡのＡ−Ａ’線断面図である。FIG. 1C is a cross-sectional view taken along line A-A 'of FIG. 1A. 図２Ａは、同軸線路内の電界分布を説明する断面図である。FIG. 2A is a cross-sectional view for explaining the electric field distribution in the coaxial line. 図２Ｂは、突起部に挟まれた内部導体の電界分布を説明する断面図である。FIG. 2B is a cross-sectional view for explaining the electric field distribution of the inner conductor sandwiched by the protrusions. 図２Ｃは、コプレナ線路の電界分布を説明する断面図である。FIG. 2C is a cross-sectional view for explaining the electric field distribution of the coplanar line. 図３は、本発明の第２の実施の形態に係るコネクタのＡ−Ａ’線断面図である。FIG. 3 is a cross-sectional view of a connector according to a second embodiment of the present invention taken along line A-A '. 図４は、本発明の第３の実施の形態に係るコネクタのＡ−Ａ’線断面図である。FIG. 4 is a cross-sectional view of a connector according to a third embodiment of the present invention taken along line A-A '. 図５は、従来のコネクタの斜視図である。FIG. 5 is a perspective view of a conventional connector. 図６は、従来のコネクタにおける電界分布を説明する断面図である。FIG. 6 is a cross-sectional view for explaining the electric field distribution in the conventional connector.

以下、本発明の好適な実施の形態について、図１から図４を参照して詳細に説明する。各図について共通する構成要素には、同一の符号が付されている。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. The components common to the respective drawings are denoted by the same reference numerals.

［第１の実施の形態］
図１Ａは、コプレナ線路２００に実装されたコネクタ１００の平面図である。図１Ｂは、コプレナ線路２００に実装されたコネクタ１００の側面図である。図１Ｃは、図１ＡのＡ−Ａ’線断面図である。 First Embodiment
FIG. 1A is a plan view of a connector 100 mounted on a coplanar line 200. FIG. FIG. 1B is a side view of connector 100 mounted on coplanar line 200. FIG. 1C is a cross-sectional view taken along line AA 'of FIG. 1A.

本実施の形態に係るコネクタ１００は同軸線路を構成し、コプレナ線路２００に接続される。コネクタ１００は、同軸線路を伝搬する高周波信号を中継してコプレナ線路２００へ伝送する。本実施の形態に係るコネクタ１００は、エッジマウント型のコネクタであり、コプレナ線路２００の端部に載置される。   The connector 100 according to the present embodiment constitutes a coaxial line and is connected to the coplanar line 200. The connector 100 relays the high frequency signal propagating in the coaxial line and transmits it to the coplanar line 200. The connector 100 according to the present embodiment is an edge mount type connector, and is mounted on the end of the coplanar line 200.

コネクタ１００は、外部導体１０１、内部導体１０２、誘電体層１０３、および一対の電極１０４を備える。外部導体１０１と内部導体１０２とは、同軸構造に形成されている。内部導体１０２と、その周囲に挿入された誘電体層１０３と、外部導体１０１とは、同軸線路を構成する。   The connector 100 includes an outer conductor 101, an inner conductor 102, a dielectric layer 103, and a pair of electrodes 104. The outer conductor 101 and the inner conductor 102 are formed in a coaxial structure. The inner conductor 102, the dielectric layer 103 inserted around the inner conductor 102, and the outer conductor 101 constitute a coaxial line.

外部導体１０１は、ブロック状に形成され、内部に軸方向に延伸した円筒状の貫通孔を有する。外部導体１０１は、貫通孔に挿入された誘電体層１０３を介して、高周波信号を伝搬する内部導体１０２を内包している。図１Ｃに示すように、外部導体１０１に形成された円筒状の貫通孔は、内部導体１０２と同軸上に形成されている。外部導体１０１は金属材料によって形成される。   The outer conductor 101 is formed in a block shape, and has an axially extending cylindrical through hole inside. The outer conductor 101 includes an inner conductor 102 for propagating a high frequency signal through the dielectric layer 103 inserted in the through hole. As shown in FIG. 1C, a cylindrical through hole formed in the outer conductor 101 is formed coaxially with the inner conductor 102. The outer conductor 101 is formed of a metal material.

外部導体１０１のコプレナ線路２００側の端面からは、内部導体１０２の先端部１０２ａが軸方向に延出している。また、外部導体１０１における同じ端面には、一対の電極１０４が形成されている。外部導体１０１は、内部導体１０２の接地導体として機能する。   From the end face of the outer conductor 101 on the coplanar line 200 side, a tip end portion 102 a of the inner conductor 102 extends in the axial direction. Further, a pair of electrodes 104 is formed on the same end face of the outer conductor 101. The outer conductor 101 functions as a ground conductor of the inner conductor 102.

内部導体１０２は、軸方向に延伸して形成されている。内部導体１０２は、軸方向に垂直な断面が、軸Ｏを中心とした円形に形成されている。内部導体１０２は、外部導体１０１および誘電体層１０３を含んで構成される同軸線路の信号芯線である。   The inner conductor 102 is formed to extend in the axial direction. The inner conductor 102 has a cross section perpendicular to the axial direction formed in a circle centered on the axis O. The inner conductor 102 is a signal core of a coaxial line including the outer conductor 101 and the dielectric layer 103.

内部導体１０２は、図１Ａに示すように、ブロック形状の外部導体１０１の端面から軸方向に延出した先端部１０２ａを有する。内部導体１０２の先端部１０２ａは、コプレナ線路２００の表面に設けられた線路導体２０１に電気的に接続している。内部導体１０２は金属材料により形成される。   As shown in FIG. 1A, the inner conductor 102 has a tip 102 a axially extending from the end face of the block-shaped outer conductor 101. The tip portion 102 a of the inner conductor 102 is electrically connected to a line conductor 201 provided on the surface of the coplanar line 200. The inner conductor 102 is formed of a metal material.

誘電体層１０３は、外部導体１０１の内部に挿入され、内部導体１０２を覆う。誘電体層１０３としては、例えば、テフロン（登録商標）やポリエチレンなどを用いてもよい。   The dielectric layer 103 is inserted inside the outer conductor 101 and covers the inner conductor 102. For example, Teflon (registered trademark) or polyethylene may be used as the dielectric layer 103.

電極１０４は、外部導体１０１のコプレナ線路２００側の端面から軸方向に平行な方向に突出し、内部導体１０２の先端部１０２ａを挟むように一対に形成されている。本実施の形態では、電極１０４は、ブロック状に形成されている。一対の電極１０４は互いに離間しており、コプレナ線路２００の接地導体２０２のそれぞれと電気的に接続している。   The electrodes 104 project in a direction parallel to the axial direction from the end face of the outer conductor 101 on the coplanar line 200 side, and are formed in a pair so as to sandwich the tip portion 102 a of the inner conductor 102. In the present embodiment, the electrode 104 is formed in a block shape. The pair of electrodes 104 are separated from each other, and electrically connected to each of the ground conductors 202 of the coplanar line 200.

電極１０４は、外部導体１０１に連続して外部導体１０１と同じ金属材料で形成され、内部導体１０２の接地導体として機能する。電極１０４は、先端部１０２ａの終端部よりもコプレナ線路２００方向に延設されている。   The electrode 104 is formed of the same metal material as the outer conductor 101 continuously to the outer conductor 101, and functions as a ground conductor of the inner conductor 102. The electrode 104 is extended in the direction of the coplanar line 200 from the end of the tip end 102a.

図１Ｃに示すように、一対の電極１０４の先端部１０２ａ側の側面から同軸構造の軸Ｏまでの距離Ｌは、内部導体１０２（先端部１０２ａ）の半径ｒ1より大きく、かつ、軸Ｏから外部導体１０１までの距離、すなわち内部導体１０２と外部導体１０１とで形成される同軸構造の半径ｒ2より小さい値に設定される。 As shown in FIG. 1C, the distance L from the tip 102a side surface of the pair of electrodes 104 to the axis O of the coaxial structure, greater than the radius r 1 of the inner conductor 102 (tip 102a), and, from the axis O The distance to the outer conductor 101 is set to a value smaller than the radius r 2 of the coaxial structure formed by the inner conductor 102 and the outer conductor 101.

一対の電極１０４は、上記の距離Ｌをもって内部導体１０２の先端部１０２ａから離間してそれぞれ形成されるため、電極１０４の先端部１０２ａ側の側面は、図１Ｃに示すように、コプレナ線路２００が有する接地導体２０２の線路導体２０１側の端部よりも線路導体２０１側の位置に設置される。このような構成により、電極１０４と内部導体１０２の先端部１０２ａとは空気を介して結合されることになる。   Since the pair of electrodes 104 are formed separately from the tip end portion 102a of the inner conductor 102 with the above-described distance L, as shown in FIG. 1C, the side surface of the electrode 104 on the tip end portion 102a side is the coplanar line 200. It is installed in the position by the side of the line conductor 201 rather than the end by the side of the line conductor 201 of the grounding conductor 202 which it has. With such a configuration, the electrode 104 and the tip portion 102a of the inner conductor 102 are coupled via air.

次に、コネクタ１００が接続されるコプレナ線路２００について説明する。
コプレナ線路２００は、コネクタ１００の外部導体１０１と内部導体１０２と誘電体層１０３とで形成される同軸線路の延長線上にある。 Next, the coplanar line 200 to which the connector 100 is connected will be described.
The coplanar line 200 is an extension of the coaxial line formed by the outer conductor 101, the inner conductor 102 and the dielectric layer 103 of the connector 100.

コプレナ線路２００は良く知られた多層基板構造を有し、高周波信号を伝搬する線路導体２０１と、線路導体２０１の左右に設けられた接地導体２０２とが誘電体層２０３の上面に設けられている。コプレナ線路２００の表面に配設された線路導体２０１および接地導体２０２と、裏面に配設された接地導体２０８との間には、多層基板内部の接地導体２０４、２０６、および誘電体層２０５、２０７が形成されている。   The coplanar line 200 has a well-known multilayer substrate structure, and a line conductor 201 for transmitting a high frequency signal and ground conductors 202 provided on the left and right of the line conductor 201 are provided on the top surface of the dielectric layer 203. . Between the line conductor 201 and the ground conductor 202 disposed on the front surface of the coplanar line 200 and the ground conductor 208 disposed on the back surface, the ground conductors 204 and 206 inside the multilayer board, and the dielectric layer 205, 207 are formed.

次に、本実施の形態に係るコネクタ１００とコプレナ線路２００との接続構造における、高周波信号の伝搬方向である軸方向に沿った電界分布の変化について説明する。   Next, in the connection structure of connector 100 and coplanar line 200 according to the present embodiment, a change in electric field distribution along the axial direction which is the propagation direction of the high frequency signal will be described.

図２Ａは、コネクタ１００内部の外部導体１０１と内部導体１０２とで形成される同軸線路の断面での電界分布を説明する図である。図２Ａにおいて、矢印は電気力線を示す。同軸線路の断面では、同軸モードとなるため、高周波信号が伝搬される内部導体１０２から外部導体１０１の全周に向かう全方位の分布を有する。また、内部導体１０２から外部導体１０１に点対称に分布している。   FIG. 2A is a view for explaining the electric field distribution in the cross section of the coaxial line formed by the outer conductor 101 and the inner conductor 102 in the connector 100. In FIG. 2A, arrows indicate lines of electric force. In the cross section of the coaxial line, since the coaxial mode is set, the distribution of all directions from the inner conductor 102 through which the high frequency signal is propagated to the entire circumference of the outer conductor 101 is provided. Also, they are distributed point-symmetrically from the inner conductor 102 to the outer conductor 101.

図２Ｂは、コネクタ１００とコプレナ線路２００の接続部分、すなわち一対の電極１０４に挟まれた内部導体１０２の先端部１０２ａにおける軸方向に垂直な断面での電界分布を説明する図である。図２Ｂの矢印は電気力線を示す。この接続部分における断面の電界は、内部導体１０２の先端部１０２ａを中心として、横方向に分布されている。   FIG. 2B is a view for explaining the electric field distribution in a cross section perpendicular to the axial direction in the connection portion between the connector 100 and the coplanar line 200, that is, the tip portion 102a of the inner conductor 102 sandwiched between the pair of electrodes 104. Arrows in FIG. 2B indicate lines of electric force. The electric field of the cross section at this connection portion is distributed in the lateral direction centering on the tip portion 102 a of the inner conductor 102.

図２Ｃは、コプレナ線路２００の断面での電界分布を説明する図である。図２Ｃの矢印は電気力線を示す。コプレナ線路２００の断面における電界は、線路導体２０１から、線路導体２０１の左右に配置されている接地導体２０２に向けて横方向に分布されている。   FIG. 2C is a view for explaining the electric field distribution at the cross section of the coplanar line 200. Arrows in FIG. 2C indicate electric lines of force. The electric field at the cross section of the coplanar line 200 is distributed in the lateral direction from the line conductor 201 toward the ground conductors 202 disposed on the left and right of the line conductor 201.

このように、コネクタ１００の電極１０４が、内部導体１０２の先端部１０２ａ側により近づけて配置されることで、コネクタ１００とコプレナ線路２００との接続部分において、内部導体１０２の先端部１０２ａは、接地導体の電極１０４と空気を介して結合する。そのため、図２Ｂに示すような、同軸モードとコプレナモードとの中間的な疑似的なコプレナモード、すなわちスラブラインモードが形成され、同軸モードから段階的にコプレナモードに移行され、急激なモード変化を抑制している。   Thus, the electrode 104 of the connector 100 is disposed closer to the tip end 102 a side of the inner conductor 102, whereby the tip end 102 a of the inner conductor 102 is grounded at the connection portion between the connector 100 and the coplanar line 200. It couples with the electrode 104 of the conductor through air. Therefore, as shown in FIG. 2B, an intermediate pseudo coplanar mode between the coaxial mode and the coplanar mode, that is, a slabline mode is formed, and the coaxial mode is gradually shifted to the coplanar mode to suppress abrupt mode change. There is.

なお仮に、コプレナ線路２００の多層基板上に電極１０４が接続された場合には、多層基板は空気に比べて高い誘電率を有することから、特性インピーダンスの値を一定（例えば、５０Ω）に保つためには、コプレナ線路２００の線路導体２０１パタンと接地導体２０２パタンとの距離をある程度広く設定する必要がある。   If the electrode 104 is connected on the multilayer substrate of the coplanar line 200, the multilayer substrate has a dielectric constant higher than that of air, so that the value of the characteristic impedance is kept constant (for example, 50 Ω). For this reason, it is necessary to set the distance between the line conductor 201 pattern of the coplanar line 200 and the ground conductor 202 pattern to some extent large.

しかし、本実施の形態では、接地導体として機能する電極１０４は、先端部１０２ａと空気を介して結合するため、高周波信号を伝搬する内部導体１０２の先端部１０２ａと電極１０４間の距離をより短くすることができる。   However, in the present embodiment, since the electrode 104 functioning as the ground conductor is coupled to the tip portion 102a via air, the distance between the tip portion 102a of the inner conductor 102 for propagating a high frequency signal and the electrode 104 is shorter. can do.

そのため、コプレナ線路２００の接地導体２０２とコネクタ１００の電極１０４が半田によって接続される場合であっても、スラブラインモードが形成される電極１０４と内部導体１０２の先端部１０２ａとの結合は、半田の塗布量、例えば、フィレットなどによる影響を受けない。   Therefore, even when the ground conductor 202 of the coplanar line 200 and the electrode 104 of the connector 100 are connected by solder, the connection between the electrode 104 in which the slab line mode is formed and the tip 102 a of the internal conductor 102 is solder It is not affected by the coating amount of, for example, fillets.

以上説明したように、第１の実施の形態によれば、コネクタ１００は、外部導体１０１のコプレナ線路２００側の端面から延出する内部導体１０２の先端部１０２ａを挟むように形成された一対の電極１０４を備える。また、電極１０４の内部導体１０２（先端部１０２ａ）側の側面から内部導体１０２の軸Ｏまでの距離Ｌを、内部導体１０２の円形断面の半径ｒ1より大きく、かつ、内部導体１０２と外部導体１０１とで形成される同軸構造の半径ｒ2よりも小さい値に設定する。 As described above, according to the first embodiment, the connector 100 is formed of a pair of tip portions 102a of the inner conductor 102 extending from the end surface of the outer conductor 101 on the coplanar line 200 side. An electrode 104 is provided. Further, the distance L from the side surface on the inner conductor 102 (tip portion 102 a) side of the electrode 104 to the axis O of the inner conductor 102 is larger than the radius r 1 of the circular cross section of the inner conductor 102, and And a value smaller than the radius r 2 of the coaxial structure formed by

これにより、本実施の形態に係るコネクタ１００では、同軸モードとコプレナモードとの中間的なスラブラインモードが形成され、連続的でスムーズなモードの移行が可能となり、高周波信号の伝送特性の劣化が抑制される。   As a result, in the connector 100 according to the present embodiment, an intermediate slabline mode of the coaxial mode and the coplanar mode is formed, and continuous and smooth mode transition becomes possible, thereby suppressing the deterioration of the transmission characteristics of high frequency signals. Be done.

また、本実施の形態のコネクタ１００は、コプレナ線路２００に実装される場合に、電極１０４の一部が、コプレナ線路２００の接地導体２０２よりも線路導体２０１側に配置されることになり、半田などの導体材料の塗布量によらず、安定した接続が可能となる。そのため、より実装性に優れたコネクタ１００が実現される。   Further, in the connector 100 according to the present embodiment, when the connector 100 is mounted on the coplanar line 200, a part of the electrode 104 is disposed closer to the line conductor 201 than the ground conductor 202 of the coplanar line 200. Thus, stable connection is possible regardless of the amount of applied conductive material. Therefore, the connector 100 with more excellent mountability is realized.

また、本実施の形態のコネクタ１００において、電極１０４は、コネクタ１００の製造段階で外部導体１０１の形成と同一行程にて作成することができ、加工性がより優れたコネクタ１００が実現される。   Further, in the connector 100 of the present embodiment, the electrode 104 can be formed in the same process as the formation of the outer conductor 101 at the manufacturing stage of the connector 100, and the connector 100 with more excellent processability is realized.

［第２の実施の形態］
次に、本発明の第２の実施の形態について説明する。なお、以下の説明では、上述した第１の実施の形態と同じ構成については同一の符号を付し、その説明を省略する。 Second Embodiment
Next, a second embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

第１の実施の形態では、コネクタ１００の端面に形成された一対の電極１０４は、ブロック状に形成される場合について説明した。これに対し、第２の実施の形態では、一対の電極１０４ａそれぞれの内部導体１０２側の側面は、軸方向から見て、内部導体１０２の側面と同心円状に形成される。   In the first embodiment, the case where the pair of electrodes 104 formed on the end face of the connector 100 is formed in a block shape has been described. On the other hand, in the second embodiment, the side surface on the side of the inner conductor 102 of each of the pair of electrodes 104a is formed concentrically with the side surface of the inner conductor 102 as viewed from the axial direction.

第２の実施の形態に係るコネクタ１００ａを平面および側面から見た形状は、第１の実施の形態のコネクタ１００と同一である（図１Ａ、図１Ｂ）。図３は、第２の実施の形態に係るコネクタ１００ａのＡ−Ａ’線断面図である。   The shape of the connector 100a according to the second embodiment viewed from the top and the side is the same as that of the connector 100 according to the first embodiment (FIG. 1A, FIG. 1B). FIG. 3 is a cross-sectional view of the connector 100a according to the second embodiment, taken along line A-A '.

図３に示すように、電極１０４ａの内部導体１０２側の側面から軸Ｏまでの距離Ｌは、内部導体１０２の円形断面の半径ｒ1よりも大きく、内部導体１０２と外部導体１０１とで形成される同軸構造の半径ｒ2よりも小さい値に設定される。 As shown in FIG. 3, the distance L from the side surface on the inner conductor 102 side of the electrode 104 a to the axis O is larger than the radius r 1 of the circular cross section of the inner conductor 102 and is formed by the inner conductor 102 and the outer conductor 101. It is set to a value smaller than the radius r 2 of the coaxial structure that.

また、電極１０４ａの内部導体１０２側の側面は、軸Ｏを中心とした、内部導体１０２の円形断面と同心円状に形成される。   Further, the side surface of the electrode 104 a on the side of the inner conductor 102 is formed concentrically with the circular cross section of the inner conductor 102 around the axis O.

電極１０４ａの内部導体１０２とは反対側の側面は、内部導体１０２側の側面と平行となる、対応した形状を有するが、これに限られない。   The side surface of the electrode 104a opposite to the inner conductor 102 has a corresponding shape parallel to the side surface of the inner conductor 102, but is not limited thereto.

電極１０４ａは、例えば、第１の実施の形態のブロック状の電極１０４が外部導体１０１に連続して形成された後に、ドリルで加工して側面を形成すれば、容易にコネクタ１００ａを製造することができる。   For example, after the block-shaped electrode 104 of the first embodiment is continuously formed on the outer conductor 101, the electrode 104a is easily processed by a drill to form a side surface, thereby easily manufacturing the connector 100a. Can.

また、電極１０４ａの内部導体１０２側の側面を、内部導体１０２の側面と同心円状に形成することで、コネクタ１００ａ側の外部導体１０１と内部導体１０２と誘電体層１０３とで構成される同軸線路の同軸モードから、コプレナ線路２００におけるコプレナモードに至るまでに、よりコプレナモードに近づけるモードを形成することが可能となる。   Further, the side surface of the electrode 104 a on the side of the inner conductor 102 is formed concentrically with the side surface of the inner conductor 102, thereby forming a coaxial line constituted of the outer conductor 101 on the connector 100 a side, the inner conductor 102 and the dielectric layer 103. It is possible to form a mode closer to the coplanar mode from the coaxial mode to the coplanar mode in the coplanar line 200.

以上説明したように、第２の実施の形態では、電極１０４ａの内部導体１０２側の側面が、内部導体１０２の側面と同心円状の形状を有するので、電極１０４ａに挟まれた内部導体１０２の先端部１０２ａは、よりコプレナモードに近いモードを形成することが可能となる。   As described above, in the second embodiment, since the side surface of the electrode 104a on the side of the inner conductor 102 has a shape concentric with the side surface of the inner conductor 102, the tip of the inner conductor 102 sandwiched between the electrodes 104a. The part 102a can form a mode closer to the coplanar mode.

［第３の実施の形態］
次に、本発明の第３の実施の形態について説明する。なお、以下の説明では、上述した第１の実施の形態と同じ構成については同一の符号を付し、その説明を省略する。 Third Embodiment
Next, a third embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

第２の実施の形態では、電極１０４ａの内部導体１０２側の側面は、内部導体１０２の側面と同心円状に形成される場合について説明した。これに対し、第３の実施の形態では、一対の電極１０４ｂの内部導体１０２側の側面は軸Ｏから離れる方向に凹んだ形状を有する。   In the second embodiment, the case where the side surface of the electrode 104a on the side of the inner conductor 102 is formed concentrically with the side surface of the inner conductor 102 has been described. On the other hand, in the third embodiment, the side surface of the pair of electrodes 104b on the side of the inner conductor 102 has a shape that is recessed in the direction away from the axis O.

第３の実施の形態に係るコネクタ１００ｂを平面から見た形状は、第１および第２の実施の形態のコネクタ１００、１００ａと同一である（図１Ａ）。なお、第３の実施の形態に係るコネクタ１００ｂを側面から見た形状は第１および第２の実施の形態に係るコネクタ１００、１００ａ（図１Ｂ）と同様であり省略する。図４は、第３の実施の形態に係るコネクタ１００ｂのＡ−Ａ’線断面図である。   The shape of the connector 100b according to the third embodiment as viewed from above is identical to that of the connectors 100 and 100a of the first and second embodiments (FIG. 1A). The shape of the connector 100b according to the third embodiment as viewed from the side is the same as that of the connectors 100 and 100a (FIG. 1B) according to the first and second embodiments and will be omitted. FIG. 4 is a cross-sectional view taken along the line A-A 'of the connector 100b according to the third embodiment.

図４に示すように、電極１０４ｂが外部導体１０１の端面からの突出する方向の電極１０４の断面は、多角形状に形成されている。また、電極１０４ｂの内部導体１０２側の側面は、軸方向に長手方向を有する２つの長方形がＶ字形状を形成している。なお、電極１０４ｂの内部導体１０２側のＶ字形状を形成する側面は、それぞれＶ字形状の谷部が軸Ｏから離れる方向に形成されている。   As shown in FIG. 4, the cross section of the electrode 104 in the direction in which the electrode 104 b protrudes from the end face of the outer conductor 101 is formed in a polygonal shape. Further, in the side surface of the electrode 104b on the side of the inner conductor 102, two rectangles having a longitudinal direction in the axial direction form a V-shape. Note that V-shaped valleys are formed in a direction away from the axis O in the side surfaces of the electrode 104b that form the V-shape on the inner conductor 102 side.

また、図４に示すように、電極１０４ｂの側面から軸Ｏまでの距離Ｌ１、Ｌ２は、内部導体１０２の円形断面の半径ｒ1より大きく、かつ、内部導体１０２と外部導体１０１とで形成される同軸構造の半径ｒ2より小さい値に設定される。このような距離Ｌ１、Ｌ２が設定されることで、電極１０４ｂに挟まれた内部導体１０２の先端部１０２ａはコプレナモードにより近いモードを形成することが可能となる。 Further, as shown in FIG. 4, the distance L1, L2 from the side of the electrode 104b to the axis O is greater than the radius r 1 of circular cross-section of the inner conductor 102, and is formed by the inner conductor 102 and outer conductor 101 Is set to a value smaller than the radius r 2 of the coaxial structure. By setting such distances L1 and L2, the tip end portion 102a of the internal conductor 102 sandwiched by the electrodes 104b can form a mode closer to the coplanar mode.

なお、電極１０４ｂの内部導体１０２とは反対側の側面は、内部導体１０２側のＶ字形状に形成された側面に平行となる、対応した形状を有するが、これに限られない。   Although the side surface of the electrode 104b opposite to the inner conductor 102 has a corresponding shape parallel to the side surface formed in the V shape on the inner conductor 102 side, it is not limited thereto.

以上説明したように、第３の実施の形態では、電極１０４ｂの内部導体１０２側の側面が、軸Ｏから離れる方向に凹んだＶ字形状に形成されるので、電極１０４ｂの加工がより容易となる。また、より加工が容易な電極１０４ｂを含むコネクタ１００ｂによって、コプレナモードにより近いモードを形成することができる。   As described above, in the third embodiment, the side surface of the electrode 104b on the side of the inner conductor 102 is formed in a V shape which is recessed in the direction away from the axis O, so that processing of the electrode 104b is easier. Become. Further, a mode closer to the coplanar mode can be formed by the connector 100b including the electrode 104b which is easier to process.

以上、本発明のコネクタにおける実施の形態について説明したが、本発明は説明した実施の形態に限定されるものではなく、請求項に記載した発明の範囲において当業者が想定し得る各種の変形を行うことが可能である。   Although the embodiment of the connector according to the present invention has been described above, the present invention is not limited to the described embodiment, and various modifications may be conceived by those skilled in the art within the scope of the invention described in the claims. It is possible to do.

例えば、説明した実施の形態では、電極１０４における突出方向に垂直な方向の長さは、図１Ｃに示したように、内部導体１０２の直径よりも大きい場合について説明したが、電極１０４の垂直方向の長さは設計に応じて変更すればよい。   For example, in the embodiment described above, the length of the electrode 104 in the direction perpendicular to the protruding direction is larger than the diameter of the inner conductor 102 as shown in FIG. 1C. The length of the may be changed according to the design.

また、説明した実施の形態では、外部導体１０１はブロック状に形成される場合について説明したが、外部導体１０１の形状はこれに限られない。   Moreover, although the case where the outer conductor 101 was formed in block shape was demonstrated in embodiment described, the shape of the outer conductor 101 is not restricted to this.

１００、１００ａ、１００ｂ…コネクタ、１０１…外部導体、１０２…内部導体、１０２ａ…先端部、１０３、２０３、２０５、２０７…誘電体層、１０４、１０４ａ、１０４ｂ…電極、２００…コプレナ線路、２０１…線路導体、２０２、２０４、２０６、２０８…接地導体。   DESCRIPTION OF SYMBOLS 100, 100a, 100b ... Connector, 101 ... Outer conductor, 102 ... Internal conductor, 102a ... Tip part, 103, 203, 205, 207 ... Dielectric layer, 104, 104a, 104b ... Electrode, 200 ... Coplanar line, 201 ... Line conductor, 202, 204, 206, 208 ... ground conductor.

Claims (4)

軸方向に延伸した円筒状の貫通孔を有する外部導体と、
前記外部導体の前記貫通孔内に配設され、前記軸方向に延伸し、その軸方向に垂直な断面が軸を中心とした円形に形成された内部導体と、
前記内部導体と前記外部導体との間に設けられた誘電体層と、
前記外部導体の端面から前記軸方向に沿って突出し、互いに離間して形成され、それぞれ前記外部導体と電気的に接続された一対の電極と、
を備え、
前記内部導体は、前記外部導体の前記端面から前記軸方向に延出した先端部を有し、
前記一対の電極は、前記先端部を挟むように設けられ、
前記一対の電極それぞれの前記先端部側の側面から前記軸までの距離は、前記内部導体の前記断面の半径より大きく、かつ、前記軸から前記外部導体までの距離より小さい
ことを特徴とするコネクタ。 An outer conductor having an axially extending cylindrical through hole;
An inner conductor which is disposed in the through hole of the outer conductor and extends in the axial direction, and a cross section perpendicular to the axial direction is formed in a circle centered on the axis;
A dielectric layer provided between the inner conductor and the outer conductor;
A pair of electrodes which project from the end face of the outer conductor along the axial direction and are formed apart from each other and which are respectively electrically connected to the outer conductor;
Equipped with
The inner conductor has a tip extending in the axial direction from the end face of the outer conductor,
The pair of electrodes are provided so as to sandwich the tip portion,
The connector is characterized in that the distance from the side surface on the tip end side of each of the pair of electrodes to the axis is larger than the radius of the cross section of the inner conductor and smaller than the distance from the axis to the outer conductor. . 請求項１に記載のコネクタにおいて、
前記一対の電極それぞれの前記内部導体側の前記側面は、前記軸方向から見て、前記内部導体の側面と同心円状に形成されることを特徴とするコネクタ。 In the connector according to claim 1,
The connector characterized in that the side surface on the side of the inner conductor of each of the pair of electrodes is formed concentrically with the side surface of the inner conductor when viewed from the axial direction. 請求項１に記載のコネクタにおいて、
前記一対の突起部の前記内部導体側の前記側面は前記軸から離れる方向に凹んだ形状を有することを特徴とするコネクタ。 In the connector according to claim 1,
The connector according to claim 1, wherein the side surface on the inner conductor side of the pair of protrusions has a shape that is recessed in a direction away from the axis. コネクタと平面線路とのコネクタ平面線路接続構造であって、
前記コネクタは、
請求項１から３のいずれか１項に記載のコネクタであり、
前記平面線路は、
誘電体からなる基板と、
前記基板の表面に配設された線路導体と、
前記線路導体の両側にそれぞれ前記線路導体から離間して前記基板の表面に配設された一対の接地導体と、
前記基板の内部に設けられた内部接地導体と、
を備え、
前記コネクタの前記先端部は、前記平面線路の前記線路導体と接続され、
前記コネクタの前記一対の電極のそれぞれは、前記平面線路の前記一対の接地導体のそれぞれと接続され、
前記コネクタの前記一対の電極の前記内部導体側の側面は、前記軸方向から見て、前記平面線路の前記一対の接地導体の前記線路導体側の端部より前記線路導体側に位置している
ことを特徴とするコネクタ平面線路接続構造。 A connector flat line connection structure of a connector and a flat line,
The connector is
The connector according to any one of claims 1 to 3,
The flat track is
A substrate made of dielectric,
A line conductor disposed on the surface of the substrate;
A pair of ground conductors disposed on the surface of the substrate, spaced apart from the line conductor on both sides of the line conductor;
An internal ground conductor provided inside the substrate;
Equipped with
The tip end of the connector is connected to the line conductor of the flat line;
Each of the pair of electrodes of the connector is connected to each of the pair of ground conductors of the flat line,
The side surface on the inner conductor side of the pair of electrodes of the connector is located on the line conductor side from the end portion on the line conductor side of the pair of ground conductors of the flat line when viewed from the axial direction Connector flat line connection structure characterized by
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