JPH0217961B2 - - Google Patents
Info
- Publication number
- JPH0217961B2 JPH0217961B2 JP60039812A JP3981285A JPH0217961B2 JP H0217961 B2 JPH0217961 B2 JP H0217961B2 JP 60039812 A JP60039812 A JP 60039812A JP 3981285 A JP3981285 A JP 3981285A JP H0217961 B2 JPH0217961 B2 JP H0217961B2
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- line
- dielectric substrate
- conductor
- bilateral
- 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.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 24
- 230000002146 bilateral effect Effects 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 18
- 230000001902 propagating effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Waveguides (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、マイクロ波伝送路の特にその広帯
域化に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microwave transmission line, particularly to widening the band.
第３図は例えば、IEEE TRANSACTION
ON MICROWAVE THEORY AND
TECHINIQIES，VOL MTT−22、No.12、1974
に示された従来のマイクロ波伝送路のバイラテラ
ルフインライン９を示すための導波管の一部切断
斜視図である。図において、１は導波管、２は電
界に平行な該導波管１のＥ面に、平行に設けられ
た誘電体基板、３は該誘電体基板２の両面に被着
した導体層即ち金属膜、４はこれら金属膜３に前
記誘電体基板２に対して対称となるように設けら
れ、前記誘電体基板２が露出している細隙部、５
は、バイラテラルフインライン９と導波管１とを
接続するために形成され誘電体基板２が露出して
いるテーパ部である。
Figure 3 shows, for example, IEEE TRANSACTION
ON MICROWAVE THEORY AND
TECHINIQIES, VOL MTT-22, No.12, 1974
FIG. 2 is a partially cutaway perspective view of a waveguide for showing a bilateral in-line 9 of the conventional microwave transmission line shown in FIG. In the figure, 1 is a waveguide, 2 is a dielectric substrate provided parallel to the E plane of the waveguide 1 parallel to the electric field, and 3 is a conductor layer deposited on both sides of the dielectric substrate 2. A metal film 4 is provided on these metal films 3 so as to be symmetrical with respect to the dielectric substrate 2, and has a narrow gap 5 where the dielectric substrate 2 is exposed.
is a tapered portion formed to connect the bilateral in-line 9 and the waveguide 1 and in which the dielectric substrate 2 is exposed.
従来のマイクロ波伝送路は上記のように構成さ
れ、導波管１を伝搬する電波は前記誘電体基板２
の両面に被着した金属膜３のテーパ部５を経由
し、大きな反射を生じることなく、細隙部４に電
磁界の集中するバイラテラルフインライン９を伝
搬するようになる。前述したバイラテラルフイン
ライン９は前記細隙部４が、フオトエツチング手
法等によつて任意の形状に構成できるうえ、導波
管１に比較して半導体素子、抵抗、キヤパシタ等
の集中定数素子を装着し易い特長があり、マイク
ロ波帯のスイツチ、変調器ミキサ等を構成するた
めの伝送路として用いられる。又、前記バイラテ
ラルフインライン９は、電波伝搬方向と直交する
横断断面が前記誘電体基板２に対して対称な構造
を有しているので、TE20の導波管モードに相当
するモードは励振されず、TE30の導波管モード
に相当するモードが不要な高次モードとなる。第
４図は上述したごとき構成のバイラテラルフイン
ライン中、例えばWRJ−140の導波管（内径寸法
15.8×7.9mm）内に、厚さ1.7mm、比誘電率2.2の誘
電体基板２を装荷し細隙部４の幅を0.3mmに設定
したバイラテラルフインライン９に関する伝搬定
数の分散特性を示したものである。第４図を参照
して明らかなように前述のごとき構成のバイラテ
ラルフインラインにおいては、基本モードの遮断
周波数が4.2GHz、高次モードの遮断周波数が22G
Hzとなり、4.2GHzから22GHzまでの広帯域伝送が
可能なことがわかる。 A conventional microwave transmission line is configured as described above, and the radio waves propagating through the waveguide 1 are transmitted through the dielectric substrate 2.
The electromagnetic field is propagated through the bilateral fine line 9 where the electromagnetic field is concentrated in the narrow gap 4 via the tapered part 5 of the metal film 3 deposited on both sides of the metal film 3 without causing a large reflection. In the bilateral in-line 9 described above, the narrow portion 4 can be formed into any shape by photo-etching or the like, and compared to the waveguide 1, it is possible to form lumped constant elements such as semiconductor elements, resistors, and capacitors. It has the feature of being easy to install, and is used as a transmission line for configuring microwave band switches, modulator mixers, etc. Furthermore, since the bilateral inline 9 has a structure in which the cross section perpendicular to the radio wave propagation direction is symmetrical with respect to the dielectric substrate 2, the mode corresponding to the waveguide mode of TE 20 is excited. Therefore, the mode corresponding to the waveguide mode of TE 30 becomes an unnecessary higher-order mode. Figure 4 shows the waveguide (inner diameter
15.8 x 7.9 mm), a dielectric substrate 2 with a thickness of 1.7 mm and a dielectric constant of 2.2 is loaded, and the width of the gap 4 is set to 0.3 mm. It is something that As is clear from Figure 4, in the bilateral in-line configured as described above, the cutoff frequency of the fundamental mode is 4.2GHz, and the cutoff frequency of higher-order modes is 22G.
Hz, indicating that wideband transmission from 4.2GHz to 22GHz is possible.
しかしながら上述したごとき構成の従来のマイ
クロ波伝送路にあつては、電波の入出力が導波管
１を介して行なわれていたために、例えば、第４
図に示したWRJ−140の導波管では、基本モード
のしや断周波数が9.5GHzとなり、これによつて
バイラテラルフインラインの伝搬可能周波数が
9.5〜22GHzと狭帯域化されるがごとき、導波管
の基本モードの伝搬周波数によつて伝搬可能周波
数が制限されるという問題点があつた。
However, in the conventional microwave transmission line having the above-mentioned configuration, since the input and output of radio waves was performed through the waveguide 1, for example, the fourth
In the WRJ-140 waveguide shown in the figure, the fundamental mode cut-off frequency is 9.5 GHz, which increases the possible frequency of bilateral in-line propagation.
As the band became narrower to 9.5 to 22 GHz, there was a problem in that the possible propagation frequency was limited by the propagation frequency of the fundamental mode of the waveguide.
この発明は、かかる問題点を改善するためにな
されたもので、導波管の基本モードの伝搬周波数
でバイラテラルフインラインの伝搬可能周波数が
制限されることがなく、広帯域伝送が可能なマイ
クロ波伝送路を得ることを目的とする。 This invention was made in order to improve this problem, and the propagation frequency of the bilateral in-line is not limited by the propagation frequency of the fundamental mode of the waveguide, making it possible to transmit microwaves over a wide band. The purpose is to obtain a transmission path.
この発明に係るマイクロ波伝送路は、ストリツ
プ導体を、誘電体基板内に、該基板の両面に形成
した細隙部の配設位置と直交するように埋設して
導体層を地導体とするトリプレート型ストリツプ
線路を構成し、前記ストリツプ導体の一端側をマ
イクロ波の入出力端に、他端側を所定の長さを有
する開放端、又は該ストリツプ導体と前記導体層
とを接続する短絡端としたものである。
The microwave transmission line according to the present invention has a strip conductor embedded in a dielectric substrate so as to be perpendicular to the position of the narrow gap formed on both sides of the substrate, and the conductor layer is used as a ground conductor. A plate-type strip line is constructed, one end of the strip conductor serves as a microwave input/output end, and the other end is an open end having a predetermined length, or a short-circuit end connecting the strip conductor and the conductor layer. That is.
この発明におけるマイクロ波伝送路は、電波
が、電波伝搬方向と直交する横断断面が誘電体基
板に対して対称な構造のトリプレート形ストリツ
プ線路を介して前記バイラテラルフインラインを
伝搬する。そのため導波管のTE20モードに相当
する不要モードは励振されず、かつ、トリプレー
ト形ストリツプ線路に遮断周波数がないので、従
来、導波管の基本モードの遮断周波数で制限され
ていた伝搬可能周波数帯域をバイラテラルフイン
ラインの伝搬可能周波数帯域に拡大することがで
きるものである。
In the microwave transmission line of the present invention, radio waves propagate through the bilateral fine line via a triplate strip line whose cross section perpendicular to the direction of radio wave propagation is symmetrical with respect to the dielectric substrate. Therefore, unnecessary modes corresponding to the TE 20 mode of the waveguide are not excited, and since the triplate strip line has no cutoff frequency, propagation that was previously limited by the cutoff frequency of the fundamental mode of the waveguide is now possible. It is possible to expand the frequency band to a frequency band in which bilateral in-line propagation is possible.
以下、この発明の一実施例を図について説明す
る。第１図ａはこの発明の一実施例を示す一部切
断斜視図、第１図ｂは第１図ａのAA断面図であ
り、１〜４と９とは上記従来のマイクロ波伝送路
と全く同一のものである。第１図ａ，ｂにおいて
６はストリツプ導体であり、前記誘電体基板２内
に、前記細隙部４の形成位置と直交するように基
板面に沿つて上方から埋設されている。該ストリ
ツプ導体６が中心導体となつて前記金属膜３を地
導体として前記誘電体基板２内にストリツプ線路
１０が構成されている。７は前記ストリツプ導体
６を有するトリプレート形ストリツプ線路１０
と、外部回路（図示せず）を接続する同軸コネク
タである。
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1a is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 1b is a sectional view taken along line AA in FIG. 1a, and 1 to 4 and 9 are the conventional microwave transmission lines and They are exactly the same. In FIGS. 1a and 1b, a strip conductor 6 is embedded in the dielectric substrate 2 from above along the substrate surface so as to be perpendicular to the position where the narrow gap 4 is formed. A strip line 10 is constructed in the dielectric substrate 2 with the strip conductor 6 serving as a center conductor and the metal film 3 serving as a ground conductor. 7 is a triplate type strip line 10 having the strip conductor 6.
and a coaxial connector for connecting an external circuit (not shown).
上記のように構成されたマイクロ波伝送路にお
いて、同軸コネクタ７から入射した電波は、前述
した先端が開放或いは短絡された構成のストリツ
プ導体６と金属膜３とからなるトリプレート形ス
トリツプ線路１０を伝搬するとともに前記誘電体
基板２の両面に形成されている細隙部４において
磁界が強められ、前記誘電体基板２の両面に形成
されているバイラテラルフインライン９を伝搬す
る電波のモードに速やかに変換される。又、前記
バイラテラルフインライン９は第２図にて図示す
るごとく夫々一端側が導波管１に短絡され、他端
側が前記細隙部４によつて開放され電波が該細隙
部４側を伝搬する構成となつているので、広い周
波数帯域にわたつて低反射な特性で前記トリプレ
ート形ストリツプ線路１０の電波モードから前記
バイラテラルフインライン９の電波モードへの変
換が可能である。そのうえ、前記トリプレート形
ストリツプ線路１０には、遮断周波数がないた
め、バイラテラルフインライン９の遮断周波数、
高次モードで決定される広帯域伝送が可能とな
り、半導体素子をバイラテラルフインライン９に
装着して構成されるスイツチ、変調器、ミキサ等
のマイクロ波デバイスの広帯域化も可能となる。 In the microwave transmission line configured as described above, the radio wave incident from the coaxial connector 7 is transmitted through the triplate type strip line 10 consisting of the strip conductor 6 and the metal film 3 whose ends are open or short-circuited. As the magnetic field propagates, the magnetic field is strengthened in the narrow gaps 4 formed on both sides of the dielectric substrate 2, and the radio wave mode quickly changes to propagate through the bilateral fine lines 9 formed on both sides of the dielectric substrate 2. is converted to Further, as shown in FIG. 2, each of the bilateral in-line lines 9 has one end short-circuited to the waveguide 1, and the other end opened by the narrow gap 4, so that the radio waves pass through the narrow gap 4. Since it is configured to propagate, it is possible to convert the radio wave mode of the triplate strip line 10 to the radio wave mode of the bilateral fine line 9 with low reflection characteristics over a wide frequency band. Moreover, since the triplate strip line 10 does not have a cutoff frequency, the cutoff frequency of the bilateral fine line 9,
Broadband transmission determined by higher-order modes becomes possible, and microwave devices such as switches, modulators, mixers, etc., which are constructed by mounting semiconductor elements on the bilateral in-line 9, can also be made broadband.
第２図はこの発明のさらに他の実施例を示すマ
イクロ波伝送路の前記第１図ｂに相当する横断断
面図であり、誘電体基板２の中に埋設されたスト
リツプ導体６の先端部に接続導体８を設け、該接
続導体８によつてストリツプ導体６と金属膜３と
を接続したものである。 FIG. 2 is a transverse cross-sectional view corresponding to FIG. A connecting conductor 8 is provided, and the strip conductor 6 and the metal film 3 are connected by the connecting conductor 8.
以上のように、この発明によればバイラテラル
フインラインを構成している誘電体基板の両面に
被着した導体層を地導体とし、誘電体基板内に設
けたストリツプ導体を中心導体とするトリプレー
ト形ストリツプ線路を介して電波が前記バイラテ
ラルフインラインを伝搬するように構成したので
導波管の基本モードの伝搬周波数でバイラテラル
フインラインの伝搬可能周波数が制限されること
がなく、広帯域伝送が可能なマイクロ波伝送路が
得られる効果がある。
As described above, according to the present invention, the conductor layer attached to both sides of the dielectric substrate constituting the bilateral in-line is used as the ground conductor, and the strip conductor provided in the dielectric substrate is used as the center conductor. Since radio waves are configured to propagate through the bilateral fline via the plate-shaped strip line, the frequency at which the bilateral fline can propagate is not limited by the propagation frequency of the fundamental mode of the waveguide, allowing broadband transmission. This has the effect of providing a microwave transmission line that is capable of
第１図ａはこの発明の一実施例によるマイクロ
波伝送路を示す一部切断斜視図、第１図ｂは第１
図ａのAA断面図、第２図はこの発明の他の実施
例を示す前記第１図ｂに相当する横断断面図、第
３図は従来のマイクロ波伝送路のバイラテラルフ
インラインを示すための導波管の一部切断斜視
図、第４図はバイラテラルフインラインを伝搬す
る基本モードと高次モードの伝搬定数の分散特性
とを示した図である。
１は導波管、２は誘電体基板、３は金属膜、４
は細隙部、６はストリツプ導体、８は接続導体、
９はバイラテラルフインライン、１０はトリプレ
ート型ストリツプ線路である。なお、図中、同一
符号は同一、又は相当部分を示す。
FIG. 1a is a partially cutaway perspective view showing a microwave transmission line according to an embodiment of the present invention, and FIG. 1b is a first
FIG. 2 is a cross-sectional view corresponding to FIG. 1 b showing another embodiment of the present invention, and FIG. 3 is a bilateral in-line of a conventional microwave transmission line. FIG. 4 is a partially cutaway perspective view of the waveguide, and is a diagram showing the dispersion characteristics of the propagation constants of the fundamental mode and higher-order modes propagating in the bilateral in-line. 1 is a waveguide, 2 is a dielectric substrate, 3 is a metal film, 4
is a narrow part, 6 is a strip conductor, 8 is a connecting conductor,
9 is a bilateral fine line, and 10 is a triplate type strip line. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
基本モードの電界面に沿つて平行に且つ長手方向
両端部が導波管に各々連接して装荷され、両面に
長手方向両端部が前記導波管と各々連接する導体
層が被着された誘電体基板とを有し、前記導体層
には、誘電体基板に対して対称な位置に導体層の
長手方向に沿つて細隙部を形成して前記誘電体基
板の両面をバイラテラルフインラインに構成した
マイクロ波伝送路において、前記誘電体基板内に
前記細隙部の形成位置と直交するように該基板面
に沿つてストリツプ導体を埋設して前記導体層を
地導体とするトリプレート型ストリツプ線路を構
成するとともに、前記ストリツプ導体の一端側は
マイクロ波の入出力端に、他端側は所定の長さを
有する開放端或いは該ストリツプ導体と前記導体
層とを接続する短絡端としたことを特徴とするマ
イクロ波伝送路。1. A waveguide, which is loaded parallel to the electric surface of the fundamental mode propagating in the waveguide and with both longitudinal ends connected to the waveguide, and both longitudinal ends are connected to the waveguide. The part has a dielectric substrate on which a conductor layer is attached, each of which is connected to the waveguide, and the conductor layer has thin strips along the longitudinal direction of the conductor layer at symmetrical positions with respect to the dielectric substrate. In a microwave transmission line in which a gap is formed on both sides of the dielectric substrate to form a bilateral in-line, a gap is formed in the dielectric substrate along the surface of the substrate so as to be orthogonal to the position where the narrow gap is formed. A strip conductor is buried to form a triplate type strip line with the conductor layer as a ground conductor, one end of the strip conductor serves as a microwave input/output end, and the other end is an open circuit having a predetermined length. A microwave transmission line characterized by having an end or a short-circuit end connecting the strip conductor and the conductor layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60039812A JPS61199302A (en) | 1985-02-28 | 1985-02-28 | Microwave transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60039812A JPS61199302A (en) | 1985-02-28 | 1985-02-28 | Microwave transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61199302A JPS61199302A (en) | 1986-09-03 |
| JPH0217961B2 true JPH0217961B2 (en) | 1990-04-24 |
Family
ID=12563378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60039812A Granted JPS61199302A (en) | 1985-02-28 | 1985-02-28 | Microwave transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61199302A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5004993A (en) * | 1989-09-19 | 1991-04-02 | The United States Of America As Represented By The Secretary Of The Navy | Constricted split block waveguide low pass filter with printed circuit filter substrate |
| JP5184561B2 (en) * | 2010-02-02 | 2013-04-17 | 日本電信電話株式会社 | Fin line type waveguide structure, polarization separator, and manufacturing method of fin line type waveguide structure |
| JP5184562B2 (en) * | 2010-02-02 | 2013-04-17 | 日本電信電話株式会社 | Fin line type waveguide structure, polarization separator, and manufacturing method of fin line type waveguide structure |
| FR3095303B1 (en) * | 2019-04-18 | 2021-04-09 | Thales Sa | WIDE BAND RADIOFREQUENCY (S) POLARIZING CELL (S) POLARIZER SCREEN |
-
1985
- 1985-02-28 JP JP60039812A patent/JPS61199302A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61199302A (en) | 1986-09-03 |
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