JP2003318614A - Input/output structure of dielectric waveguide - Google Patents
Input/output structure of dielectric waveguideInfo
- Publication number
- JP2003318614A JP2003318614A JP2002126462A JP2002126462A JP2003318614A JP 2003318614 A JP2003318614 A JP 2003318614A JP 2002126462 A JP2002126462 A JP 2002126462A JP 2002126462 A JP2002126462 A JP 2002126462A JP 2003318614 A JP2003318614 A JP 2003318614A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- wiring board
- printed wiring
- conductor
- dielectric waveguide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は誘電体導波管の入出
力構造に係るもので、プリント配線基板上に実装して外
部回路と接続するための構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output structure of a dielectric waveguide, and more particularly to a structure for mounting on a printed wiring board and connecting to an external circuit.
【０００２】[0002]
【従来の技術】従来、マイクロ波帯やミリ波帯において
低損失の伝送線路として空洞導波管が主として利用され
ているが、重量があり、大型となるために小型の機器に
は利用し難いという問題がある。2. Description of the Related Art Conventionally, a hollow waveguide is mainly used as a low-loss transmission line in a microwave band or a millimeter wave band, but it is heavy and large in size, so that it is difficult to use in a small device. There is a problem.
【０００３】そこで、誘電体材料の表面に導体膜を形成
した誘電体導波管で伝送線路を構成することが考えられ
ている。誘電体を用いることによる電磁波の短縮効果が
あり、肉厚の金属壁が必要ないということから、導波管
を小型軽量化できるという長所を有している。誘電体導
波管は通常用いられるプリント配線基板に搭載できるの
で、高周波の小型電子回路で有用な共振器、フィルタそ
の他の伝送線路として活用できる可能性がある。Therefore, it has been considered to construct a transmission line with a dielectric waveguide having a conductor film formed on the surface of a dielectric material. The use of a dielectric material has the effect of shortening electromagnetic waves and does not require a thick metal wall, which has the advantage that the waveguide can be made smaller and lighter. Since the dielectric waveguide can be mounted on a commonly used printed wiring board, there is a possibility that it can be used as a resonator, filter or other transmission line useful in a high frequency small electronic circuit.
【０００４】しかし、プリント配線基板に用いられてい
るマイクロストリップ線路と誘電体導波管の線路とでは
伝送される電磁波のモードが異なる。そのため、誘電体
導波管をプリント配線基板のマイクロストリップ線路に
搭載して利用するためには、マイクロストリップ線路か
ら誘電体導波管線路へのモード変換構造が必要となる。
このモード変換構造は、単純な構造で広い周波数帯域を
有するものが望ましいが、これまでそのような変換構造
は実現されておらず、実用化の上で大きな障害となって
いる。However, the mode of electromagnetic waves transmitted differs between the microstrip line used for the printed wiring board and the line of the dielectric waveguide. Therefore, in order to mount and use the dielectric waveguide on the microstrip line of the printed wiring board, a mode conversion structure from the microstrip line to the dielectric waveguide line is required.
This mode conversion structure is preferably a simple structure having a wide frequency band, but such a conversion structure has not been realized so far, which is a major obstacle to practical use.
【０００５】[0005]
【発明が解決しようとする課題】本発明は誘電体導波管
をプリント配線基板上に搭載可能とし、簡単な構造で広
い帯域にわたって変換を可能とする、誘電体導波管入出
力構造を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a dielectric waveguide input / output structure which allows a dielectric waveguide to be mounted on a printed wiring board and enables conversion over a wide band with a simple structure. To do.
【０００６】[0006]
【課題を解決するための手段】本発明は、プリント配線
基板上にマイクロストリップ線路あるいは共面線路を形
成し、誘電体導波管側にも同様な線路を形成することに
よって、上記の課題を解決するものである。The present invention solves the above problems by forming a microstrip line or coplanar line on a printed wiring board and forming a similar line on the dielectric waveguide side. It is a solution.
【０００７】すなわち、誘電体の表面に導体膜を被覆し
た誘電体導波管を周辺回路と接続するための入出力構造
において、入出力端において誘電体の底面の導体膜の一
部が除去され、プリント配線板に形成されたマイクロス
トリップ線路または共面線路とその誘電体の底面の導体
膜とを接続するストリップ導体が、プリント配線板の表
面とその誘電体の当該底面の少なくとも一方に形成さ
れ、そのストリップ導体の両側にプリント配線板の裏面
の導体膜とその誘電体の側面の導体膜とを接続する導体
が形成されたことに特徴を有するものである。That is, in an input / output structure for connecting a dielectric waveguide in which a conductor film is coated on the surface of a dielectric to a peripheral circuit, a part of the conductor film on the bottom surface of the dielectric is removed at the input / output end. A strip conductor connecting the microstrip line or coplanar line formed on the printed wiring board and the conductor film on the bottom surface of the dielectric is formed on at least one of the surface of the printed wiring board and the bottom surface of the dielectric. It is characterized in that conductors for connecting the conductor film on the back surface of the printed wiring board and the conductor films on the side surfaces of the dielectric are formed on both sides of the strip conductor.
【０００８】[0008]
【発明の実施の形態】誘電体導波管の入出力段の底面
に、実装するプリント配線基板に設けられた信号線と同
様なマイクロストリップ線路状、または共面線路状の電
極パターンを形成し、この線路パターンが誘電体導波管
の底面で終端される形となる。これをプリント配線基板
の信号線と接続できるようにし、プリント配線基板から
の信号が誘電体導波管内部の伝送モードと結合するよう
にする。BEST MODE FOR CARRYING OUT THE INVENTION A microstrip line-shaped or coplanar line-shaped electrode pattern similar to a signal line provided on a printed wiring board to be mounted is formed on the bottom surface of an input / output stage of a dielectric waveguide. , This line pattern is terminated at the bottom surface of the dielectric waveguide. This is connected to the signal line of the printed wiring board so that the signal from the printed wiring board is coupled to the transmission mode inside the dielectric waveguide.
【０００９】変換部のプリント配線基板の側面には導体
膜を設ける。あるいは、変換部の基板内に誘電体導波管
の幅と同程度の幅で導体を充填したスルーホールを直線
的に並べることで導体壁の代用とすることができる。A conductor film is provided on the side surface of the printed wiring board of the conversion section. Alternatively, the conductor walls can be substituted by arranging linearly the through holes filled with the conductor in the width of the dielectric waveguide in the substrate of the conversion section.
【００１０】変換部の理想的な長さは、変換部を伝播す
る２つのモードの位相定数β1、β2から次の式で計算さ
れる。変換部の長さ（Ｌ）をこれに近付けたときに最も
反射が少なくなり広帯域な変換特性が得られる。
Ｌ＝π／（β1−β2）The ideal length of the converter is calculated from the phase constants β 1 and β 2 of the two modes propagating through the converter by the following equation. When the length (L) of the conversion part is brought close to this, the reflection is minimized and the wide band conversion characteristic is obtained. L = π / (β 1 −β 2 )
【００１１】[0011]
【実施例】以下、図面を参照して、本発明の実施例につ
いて説明する。図１は本発明の実施例を示す斜視図であ
り、入出力の一端側のみを示したものである。誘電体導
波管は直方体の誘電体11とその表面に形成された導体膜
からなる。入出力部にはストリップ線路13が端面に向っ
て形成されており、その両側の部分14は導体膜が形成さ
れずに誘電体が露出している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, showing only one end side of input / output. The dielectric waveguide is composed of a rectangular parallelepiped dielectric 11 and a conductor film formed on the surface thereof. A strip line 13 is formed in the input / output portion toward the end face, and a conductor film is not formed in the portions 14 on both sides of the strip line 13 and the dielectric is exposed.
【００１２】プリント配線基板15には図示しない裏面の
導体膜とそれに対向するストリップ状の導体17からなる
マイクロストリップ線路が形成されている。このプリン
ト配線基板15上のマイクロストリップ線路が誘電体導波
管の底面で終端される構成となっている。この構造で
は、基本的にはマイクロストリップ線路の上に底面の導
体膜の一部を除去した誘電体導波管を搭載するだけで接
続ができることになる。なお、プリント配線基板15の変
換部分の端面には導体膜19を形成して、この部分からの
電磁波の漏れを防ぐ必要がある。On the printed wiring board 15, a microstrip line composed of a conductor film on the back surface (not shown) and a strip-shaped conductor 17 facing the conductor film is formed. The microstrip line on the printed wiring board 15 is terminated at the bottom surface of the dielectric waveguide. In this structure, basically, the connection can be made only by mounting the dielectric waveguide in which a part of the conductor film on the bottom surface is removed on the microstrip line. Note that it is necessary to form a conductor film 19 on the end surface of the conversion portion of the printed wiring board 15 to prevent leakage of electromagnetic waves from this portion.
【００１３】図２は、本発明の他の実施例を示す斜視図
で、誘電体導波管21をプリント配線基板25に搭載するこ
とは同じであるが、プリント配線基板25の内部に導体29
を形成したものである。実際に図２の構造を実現するこ
とは難しいので、図３に示したように、プリント配線基
板35に形成したスルーホールに導体39を充填した構造と
することもできる。FIG. 2 is a perspective view showing another embodiment of the present invention. Although the dielectric waveguide 21 is mounted on the printed wiring board 25 in the same manner, conductors 29 are provided inside the printed wiring board 25.
Is formed. Since it is difficult to actually realize the structure of FIG. 2, as shown in FIG. 3, the through hole formed in the printed wiring board 35 may be filled with the conductor 39.
【００１４】プリント配線基板の比誘電率を2.2、誘電
体導波管の誘電体材料の比誘電率を4.5として、誘電体
導波管の断面寸法を幅4mm、高さ2.5mm、プリント配線基
板の厚みを0.381mmとしたときの変換部を伝播するモー
ドを図４に示した。図４に示したような電界分布を有す
る2つのモードが存在し、この2つの伝播モードの位相定
数を計算すると図５に示したようになる。Assuming that the relative permittivity of the printed wiring board is 2.2 and the relative permittivity of the dielectric material of the dielectric waveguide is 4.5, the sectional dimensions of the dielectric waveguide are 4 mm in width, 2.5 mm in height, and printed wiring board. Fig. 4 shows the modes that propagate through the converter when the thickness of the is 0.381 mm. There are two modes having the electric field distribution as shown in FIG. 4, and the phase constants of these two propagation modes are calculated as shown in FIG.
【００１５】設計周波数を26GHzとしたとき、第1の伝播
モードの位相定数は980(rad/m)、第2の伝播モードの位
相定数は727（rad/m）なので、最適な変換部の長さは
Ｌ＝π/（980−727）＝12.4(mm)
と計算される。When the design frequency is 26 GHz, the phase constant of the first propagation mode is 980 (rad / m) and the phase constant of the second propagation mode is 727 (rad / m). The length is calculated as L = π / (980-727) = 12.4 (mm).
【００１６】比誘電率4.5の誘電体材料で上記サイズで
全長36mmの誘電体導波管の両端に長さ12mmの変換部を配
置した、図6のような測定サンプルを試作して、測定し
たところ図７に示した特性が得られた。この実測特性は
23GHzから30GHzまでの広い周波数帯でリターンロスが15
Db以上になっている。また設計周波数である26GHzにお
ける挿入損失は僅か0.3dBという結果が得られた。A measurement sample as shown in FIG. 6 in which a conversion section having a length of 12 mm is arranged at both ends of a dielectric waveguide having the above-mentioned size and a length of 36 mm and made of a dielectric material having a relative permittivity of 4.5, was prepared and measured. However, the characteristics shown in FIG. 7 were obtained. This measured characteristic is
Return loss of 15 over a wide frequency band from 23 GHz to 30 GHz
It is more than Db. In addition, the insertion loss at the design frequency of 26 GHz was only 0.3 dB.
【００１７】なお、本発明は上記の誘電体導波管だけで
なく、広く導波管型の誘電体フィルタや共振器の入出力
構造として利用することができる。また、共面線路でも
同様に接続することができる。The present invention can be widely used not only as the above-mentioned dielectric waveguide but also as an input / output structure of a waveguide type dielectric filter or a resonator. Also, a coplanar line can be similarly connected.
【００１８】[0018]
【発明の効果】本発明によれば、プリント配線基板上の
信号線路が延長されて連続した形状の導体誘電体導波管
の入出力段内部にはいり込んで終端しているため、誘電
体の底面にマイクロストリップと同様のモードの電流が
流れる。変換部にはマイクロストリップ線路と類似の電
磁波のモードと誘電体導波管と類似の電磁波のモードが
同時に混在し、この2つのモードの間でエネルギーの変
換が行われる。前記の計算式で決定される長さにおい
て、マイクロストリップ線路のエネルギーが全て導波管
型誘電体フィルタなどとなる誘電体導波管内のエネルギ
ーに変換される。According to the present invention, since the signal line on the printed wiring board is extended and inserted into the inside of the input / output stage of the conductor dielectric waveguide having a continuous shape, the dielectric conductor of the dielectric waveguide is terminated. A current in the same mode as the microstrip flows on the bottom surface. The electromagnetic wave mode similar to that of the microstrip line and the electromagnetic wave mode similar to that of the dielectric waveguide are simultaneously mixed in the converter, and energy conversion is performed between these two modes. All the energy of the microstrip line is converted into energy in a dielectric waveguide such as a waveguide type dielectric filter having a length determined by the above-mentioned calculation formula.
【００１９】本発明の構造を採用すれば、誘電体導波管
の変換部の信号線がプリント配線基板の信号線と同じ平
面にあるので、連続性が保たれ、不連続部によって生じ
る高周波信号の反射を抑圧することができる。If the structure of the present invention is adopted, the signal line of the conversion portion of the dielectric waveguide is on the same plane as the signal line of the printed wiring board, so that continuity is maintained and a high frequency signal generated by the discontinuous portion is maintained. The reflection of can be suppressed.
【００２０】更に、誘電体導波管には特別な機械加工の
必要がなく、導体膜を形成するだけで済む、広帯域のモ
ード変換が可能な入出力構造が得られる。誘電体導波管
をプリント配線基板に搭載することが可能となり、通信
用電子機器の小型か、軽量化の効果も大きい。Further, the dielectric waveguide does not require special machining, and an input / output structure capable of wide-band mode conversion can be obtained by only forming a conductor film. It becomes possible to mount the dielectric waveguide on the printed wiring board, and the effect of reducing the size or weight of the communication electronic device is great.
【図１】 本発明の実施例を示す斜視図FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】 本発明の他の実施例を示す斜視図FIG. 2 is a perspective view showing another embodiment of the present invention.
【図３】 本発明の他の実施例を示す斜視図FIG. 3 is a perspective view showing another embodiment of the present invention.
【図４】 本発明による誘電体導波管の入出力構造の電
界分布を示す説明図FIG. 4 is an explanatory diagram showing an electric field distribution of an input / output structure of a dielectric waveguide according to the present invention.
【図５】 本発明による誘電体導波管の位相定数を示す
説明図FIG. 5 is an explanatory diagram showing a phase constant of a dielectric waveguide according to the present invention.
【図６】 本発明の他の実施例を示す斜視図FIG. 6 is a perspective view showing another embodiment of the present invention.
【図７】 本発明による誘電体導波管の特性の説明図FIG. 7 is an explanatory diagram of characteristics of the dielectric waveguide according to the present invention.
11、21：誘電体導波管 15、25、35：プリント配線基板 19、29、39：導体 11, 21: Dielectric waveguide 15, 25, 35: Printed wiring board 19, 29, 39: Conductor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 和久 埼玉県比企郡玉川村大字玉川字日野原828 番地 東光株式会社玉川工場内 Ｆターム(参考） 5J014 HA00 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kazuhisa Sano 828 Hinohara, Tamagawa character, Tamagawa village, Hiki district, Saitama prefecture Address Toko Co., Ltd. Tamagawa factory F-term (reference) 5J014 HA00
Claims (3)
導波管を周辺回路と接続するための入出力構造におい
て、入出力端において誘電体の底面の導体膜の一部が除
去され、プリント配線板に形成されたマイクロストリッ
プ線路とその誘電体の底面の導体膜とを接続するストリ
ップ導体が、プリント配線板の表面とその誘電体の当該
底面の少なくとも一方に形成され、そのストリップ導体
の両側にプリント配線板の裏面の導体膜とその誘電体の
側面の導体膜とを接続する導体が形成されたことを特徴
とする誘電体導波管の入出力構造。1. An input / output structure for connecting a dielectric waveguide in which a conductor film is coated on a surface of a dielectric to a peripheral circuit, wherein a part of the conductor film on the bottom surface of the dielectric is removed at an input / output end. A strip conductor that connects the microstrip line formed on the printed wiring board and the conductor film on the bottom surface of the dielectric is formed on at least one of the surface of the printed wiring board and the bottom surface of the dielectric, and the strip conductor An input / output structure for a dielectric waveguide, characterized in that conductors for connecting the conductor film on the back surface of the printed wiring board and the conductor films on the side surfaces of the dielectric are formed on both sides of the conductor.
導波管を周辺回路と接続するための入出力構造におい
て、入出力端において誘電体の底面の導体膜の一部が除
去され、プリント配線板に形成された共面線路とその誘
電体の底面の導体膜とを接続するストリップ導体が、プ
リント配線板の表面とその誘電体の当該底面の少なくと
も一方に形成され、そのストリップ導体の両側にプリン
ト配線板の裏面の導体膜とその誘電体の側面の導体膜と
を接続する導体が形成されたことを特徴とする誘電体導
波管の入出力構造。誘電体導波管を外部回路と接続する
ための入出力構造において、2. In an input / output structure for connecting a dielectric waveguide, the surface of which is coated with a conductor film, to a peripheral circuit, a part of the conductor film on the bottom surface of the dielectric is removed at the input / output end. A strip conductor connecting the coplanar line formed on the printed wiring board and the conductor film on the bottom surface of the dielectric is formed on at least one of the surface of the printed wiring board and the bottom surface of the dielectric, and the strip conductor An input / output structure for a dielectric waveguide, characterized in that conductors for connecting the conductor film on the back surface of the printed wiring board and the conductor films on the side surfaces of the dielectric are formed on both sides of the conductor. In the input / output structure for connecting the dielectric waveguide to the external circuit,
線基板に形成されたスルーホールに充填された導体であ
る請求項１または請求項２記載の誘電体導波管の入出力
構造。3. The dielectric waveguide input / output structure according to claim 1, wherein the conductor connecting the front and back surfaces is a conductor filled in a through hole formed in a printed wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002126462A JP3902062B2 (en) | 2002-04-26 | 2002-04-26 | Input / output structure of dielectric waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002126462A JP3902062B2 (en) | 2002-04-26 | 2002-04-26 | Input / output structure of dielectric waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003318614A true JP2003318614A (en) | 2003-11-07 |
| JP3902062B2 JP3902062B2 (en) | 2007-04-04 |
Family
ID=29540870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002126462A Expired - Fee Related JP3902062B2 (en) | 2002-04-26 | 2002-04-26 | Input / output structure of dielectric waveguide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3902062B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318360A (en) * | 2004-04-30 | 2005-11-10 | Tdk Corp | Waveguide type wave guide line and high frequency module |
| JP2005318632A (en) * | 2004-04-29 | 2005-11-10 | Thomson Licensing | Non-contact transition part element between waveguide and microstrip feed line |
| KR100764604B1 (en) | 2005-08-24 | 2007-10-19 | 센싱테크 주식회사 | Non-Radiative Microstrip Line with Ground Pattern |
| JP2010206326A (en) * | 2009-02-27 | 2010-09-16 | Kyocera Corp | High-frequency circuit board, and transmitter, receiver, transmitter/receiver, and radar system equipped with the high-frequency circuit board |
| US9437913B2 (en) | 2013-03-29 | 2016-09-06 | Toko, Inc. | Dielectric waveguide comprised of a dielectric block and a dielectric plate sandwiching an input/output feeder line |
| JP2016171488A (en) * | 2015-03-13 | 2016-09-23 | 東光株式会社 | Dielectric waveguide input-output structure and dielectric waveguide filter using the same |
| US9577309B2 (en) | 2013-03-29 | 2017-02-21 | Molex, Llc | High-frequency wave transmitting device including a connecting portion for connecting a waveguide to an antenna |
| KR102085921B1 (en) * | 2019-06-21 | 2020-03-06 | 모아컴코리아주식회사 | Ceramin Waveguide Filter Including Muliple Dielectric Blocks |
Citations (5)
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|---|---|---|---|---|
| JPH09321507A (en) * | 1996-05-27 | 1997-12-12 | Mitsubishi Electric Corp | Mode converter |
| JP2000216605A (en) * | 1999-01-21 | 2000-08-04 | Kyocera Corp | Connection structure between dielectric waveguide line and high frequency line conductor |
| JP2002026611A (en) * | 2000-07-07 | 2002-01-25 | Nec Corp | Filter |
| JP2002043807A (en) * | 2000-07-31 | 2002-02-08 | Sharp Corp | Waveguide-type dielectric filter |
| JP2002111329A (en) * | 2000-10-03 | 2002-04-12 | Toko Inc | Dielectric resonator and filter |
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2002
- 2002-04-26 JP JP2002126462A patent/JP3902062B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09321507A (en) * | 1996-05-27 | 1997-12-12 | Mitsubishi Electric Corp | Mode converter |
| JP2000216605A (en) * | 1999-01-21 | 2000-08-04 | Kyocera Corp | Connection structure between dielectric waveguide line and high frequency line conductor |
| JP2002026611A (en) * | 2000-07-07 | 2002-01-25 | Nec Corp | Filter |
| JP2002043807A (en) * | 2000-07-31 | 2002-02-08 | Sharp Corp | Waveguide-type dielectric filter |
| JP2002111329A (en) * | 2000-10-03 | 2002-04-12 | Toko Inc | Dielectric resonator and filter |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318632A (en) * | 2004-04-29 | 2005-11-10 | Thomson Licensing | Non-contact transition part element between waveguide and microstrip feed line |
| JP4516883B2 (en) * | 2004-04-29 | 2010-08-04 | トムソン ライセンシング | Non-contact transition element between waveguide and microstrip feed line |
| JP2005318360A (en) * | 2004-04-30 | 2005-11-10 | Tdk Corp | Waveguide type wave guide line and high frequency module |
| KR100764604B1 (en) | 2005-08-24 | 2007-10-19 | 센싱테크 주식회사 | Non-Radiative Microstrip Line with Ground Pattern |
| JP2010206326A (en) * | 2009-02-27 | 2010-09-16 | Kyocera Corp | High-frequency circuit board, and transmitter, receiver, transmitter/receiver, and radar system equipped with the high-frequency circuit board |
| US9437913B2 (en) | 2013-03-29 | 2016-09-06 | Toko, Inc. | Dielectric waveguide comprised of a dielectric block and a dielectric plate sandwiching an input/output feeder line |
| US9577309B2 (en) | 2013-03-29 | 2017-02-21 | Molex, Llc | High-frequency wave transmitting device including a connecting portion for connecting a waveguide to an antenna |
| JP2016171488A (en) * | 2015-03-13 | 2016-09-23 | 東光株式会社 | Dielectric waveguide input-output structure and dielectric waveguide filter using the same |
| US9853339B2 (en) | 2015-03-13 | 2017-12-26 | Murata Manufacturing Co., Ltd. | Dielectric waveguide input/output structure and dielectric waveguide filter using the same |
| KR102085921B1 (en) * | 2019-06-21 | 2020-03-06 | 모아컴코리아주식회사 | Ceramin Waveguide Filter Including Muliple Dielectric Blocks |
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| JP3902062B2 (en) | 2007-04-04 |
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