JPH01273401A - Branching filter - Google Patents
Branching filterInfo
- Publication number
- JPH01273401A JPH01273401A JP10296888A JP10296888A JPH01273401A JP H01273401 A JPH01273401 A JP H01273401A JP 10296888 A JP10296888 A JP 10296888A JP 10296888 A JP10296888 A JP 10296888A JP H01273401 A JPH01273401 A JP H01273401A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- frequency band
- rectangular
- low frequency
- rectangular branch
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000010287 polarization Effects 0.000 claims description 9
- 208000029154 Narrow face Diseases 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は複数周波数帯の互いに直交する偏波の電磁波を
分波するための分波器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a duplexer for demultiplexing electromagnetic waves of mutually orthogonal polarization in a plurality of frequency bands.
従来、この種の分波器として、第２図に示すものが採用
されている。即ち、低い周波数の電磁波ｆ１と高い周波
数の電磁波ｆ２を導入する円形をした主導波管１と、電
磁波ｆ、を分岐するため主導波管１に設けられた結合孔
２と、電磁波ｒ１に対して整合をとるためのステップ変
換部８と、電磁波ｆ＋、を取り出す分岐導波管３と、主
導波管１に直列に接続され電磁波ｆ２に対してカットオ
フとなるような形状の副導波管６と、主導波管１と副導
波管６との間に設けられ電磁波ｆ！に対して整合をとる
ためのステップ変換部５と、主導波管１内の結合孔２と
ステップ変換部５との間に電磁波ｆ、の偏波と平行な方
向に設けられた短絡板７とで構成されている。Conventionally, as this type of duplexer, one shown in FIG. 2 has been employed. That is, a circular main wave tube 1 that introduces a low frequency electromagnetic wave f1 and a high frequency electromagnetic wave f2, a coupling hole 2 provided in the main wave tube 1 to branch the electromagnetic wave f, and a coupling hole 2 for introducing the electromagnetic wave f1 of a low frequency and an electromagnetic wave f2 of a high frequency, A step conversion unit 8 for matching, a branch waveguide 3 for taking out the electromagnetic wave f+, and a sub waveguide 6 connected in series to the main waveguide 1 and having a shape that is cut off for the electromagnetic wave f2. and an electromagnetic wave f! provided between the main waveguide 1 and the sub waveguide 6. a step converter 5 for matching with the main waveguide 1; and a short circuit plate 7 provided between the coupling hole 2 in the main waveguide 1 and the step converter 5 in a direction parallel to the polarization of the electromagnetic wave f. It consists of
そして、ここで低周波側の電磁波ｆ１を受信波とし、高
周波側の電磁波ｆ２を特徴とする特許主導波管１に導入
された受信波ｆ１は短絡板７で反射され結合孔２を介し
、ステップ変換部８で矩形分岐導波管３と整合を行って
取り出される。この場合、ステップ変換部８の狭面部の
長さｂ′は送信波ｆ２に対してカットオフとなるような
寸法に選ばれている。Here, the received wave f1 introduced into the patented wave tube 1, which is characterized by the electromagnetic wave f1 on the low frequency side and the electromagnetic wave f2 on the high frequency side, is reflected by the short circuit plate 7 and passes through the coupling hole 2 to step The converter 8 performs matching with the rectangular branch waveguide 3 and takes it out. In this case, the length b' of the narrow section of the step converter 8 is selected to be a cutoff for the transmitted wave f2.
また、副導波管６を伝搬してきた送信波【、はステップ
変換部５により主導波管１と整合され、主導波管１に導
かれる。受信波ｆ、用の結合孔２には送信波ｆ！の偏波
に対しカットオフとなるような寸法に選ばれたステップ
変換部８が接続されているため、送信波ｆ２は受信波ｆ
、用としての矩形分岐導波管３には伝搬しない。Further, the transmitted wave [, which has propagated through the sub-waveguide 6] is matched with the main waveguide 1 by the step converter 5, and is guided to the main waveguide 1. The coupling hole 2 for the received wave f, receives the transmitted wave f! Since the step converter 8 whose dimensions are selected to provide a cutoff for the polarized wave is connected, the transmitted wave f2 becomes the received wave f
, it does not propagate to the rectangular branch waveguide 3 for use.
上述した従来の分波器によれば、受信波ｆ１を取り出す
矩形分岐導波管３には、送信波ｆ２の漏洩を防ぐために
、矩形導波管の狭面部の長さｂ′を送信波ｆ８の波長の
１／２より短（選んだステップ変換部８を必要としてい
るため、分波器の構造が複雑になるという問題がある。According to the conventional duplexer described above, in order to prevent leakage of the transmitted wave f2, the rectangular branching waveguide 3 from which the received wave f1 is taken out has a length b' of the narrow side of the rectangular waveguide that is the length b' of the transmitted wave f8. Since the step converter 8 is required, there is a problem that the structure of the demultiplexer becomes complicated.
また、分岐導波管３と広帯域に整合させるためには、ス
テップ変換部８の段数を増やす必要があり、このステッ
プ変換部８と矩形分岐導波管３からなる分岐導波管部の
長さが必然的に長くなり、分波器の大型化をまねくとい
う問題がある。In addition, in order to achieve broadband matching with the branch waveguide 3, it is necessary to increase the number of stages of the step conversion section 8, and the length of the branch waveguide section consisting of the step conversion section 8 and the rectangular branch waveguide 3 is increased. There is a problem in that the length of the demultiplexer becomes inevitably long, leading to an increase in the size of the duplexer.
本発明は簡単な構造で、かつ分岐導波管部の長さを短く
した分波器を提供することを目的としている
〔課題を解決するための手段〕
本発明の分波器は、高低の各周波数帯の電磁波を伝搬す
る主導波管、低周波数帯の電磁波を伝搬する矩形分岐導
波管、高周波数帯の電磁波を伝搬する副導波管、主導波
管と副導波管との間の整合を取るステップ変換部、及び
低い周波数帯の電磁波の偏波と平行な方向に設けられた
短絡板とで構成した分波器において、矩形分岐導波管の
狭面部の長さを高い周波数帯の電磁波の波長の１／２よ
り長くし、かつこの矩形分岐導波管内に低い周波数帯の
電磁波の偏波と直交する方向の薄い金属板を設けた構成
としている。An object of the present invention is to provide a duplexer with a simple structure and a shortened length of the branching waveguide section. A main waveguide that propagates electromagnetic waves in each frequency band, a rectangular branch waveguide that propagates electromagnetic waves in a low frequency band, a sub waveguide that propagates electromagnetic waves in a high frequency band, and between the main waveguide and the sub waveguide. In the duplexer, which consists of a step converter that matches the polarization of the electromagnetic wave in the low frequency band, and a shorting plate installed in a direction parallel to the polarization of the electromagnetic wave in the low frequency band, the length of the narrow section of the rectangular branch waveguide is The wavelength of the electromagnetic wave in the band is longer than 1/2, and a thin metal plate is provided in the rectangular branch waveguide in a direction perpendicular to the polarization of the electromagnetic wave in the low frequency band.
上述した構成では、矩形分岐導波管内に設けた薄い金属
板によって高い周波数帯の電磁波が反射されて矩形分岐
導波管内への伝搬が防止され、これでステップ変換部を
不要にし、かつ矩形分岐導波管の狭面部の長さを長（す
ることで、構造の簡略化、小型化を達成する。In the above configuration, the electromagnetic waves in the high frequency band are reflected by the thin metal plate provided inside the rectangular branch waveguide and prevented from propagating into the rectangular branch waveguide. By increasing the length of the narrow section of the waveguide, the structure can be simplified and downsized.
次に、本発明を図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図において、１は円形をした主導波管、２は主導波
管１の一面に設けられた低い周波数帯の電磁波ｆ、を取
り出すための結合孔で、矩形分岐導波管３に接続されて
いる。この矩形導波管３は、その狭面部の長さｂを高い
周波数帯の電磁波ｆ８の波長の１／２の長さよりも長（
設定している。In FIG. 1, 1 is a circular main waveguide, 2 is a coupling hole provided on one side of the main waveguide 1 for extracting electromagnetic waves f in a low frequency band, and is connected to a rectangular branch waveguide 3. ing. This rectangular waveguide 3 has a narrow section length b that is longer than half the wavelength of the electromagnetic wave f8 in the high frequency band (
It is set.
そして、この矩形導波管３内には、その広面部に平行な
面内に薄い金属板４を設けている。６は主導波管１と直
列に接続された低い周波数をカットオフし、高周波数帯
の電磁波ｆ３を通過させるような形状の副導波管で、副
導波管６と主導波管１との整合を行うため、ステップ変
換部５が設けられている。７は低い周波数帯の電磁波ｆ
、を反射させ、前記結合孔２を介して矩形分岐導波管３
に導くため、主導波管１内に設けられた短絡板である。Inside this rectangular waveguide 3, a thin metal plate 4 is provided in a plane parallel to the wide surface portion. Reference numeral 6 denotes a sub-waveguide connected in series with the main waveguide 1 and shaped to cut off low frequencies and pass high-frequency electromagnetic waves f3. A step converter 5 is provided to perform matching. 7 is a low frequency electromagnetic wave f
, to the rectangular branch waveguide 3 through the coupling hole 2.
This is a short-circuit plate provided within the main waveguide 1 to guide the waveform.
いま、低周波数の電磁波ｆ、を受信波とし、高周波数の
電磁波ｒ２を送信波とする。副導波管６に送信波ｆ２が
導入された場合、送信波ｆ２はステップ変換部５にて主
導波管１に整合され、主導波管１に反射なく伝送される
。また、矩形分岐導波管３の狭面部の長さは、送信波ｆ
２の波長の１／２の長さより長いため、結合孔２で結合
した微少の送信波ｆ２が伝搬可能であるが、矩形分岐導
波管３内に設けられた薄い金属板４により反射されるた
め、送信波ｆ、は矩形分岐導波管３内に伝搬されること
はない。Now, assume that a low-frequency electromagnetic wave f is a received wave, and a high-frequency electromagnetic wave r2 is a transmitted wave. When the transmission wave f2 is introduced into the sub-waveguide 6, the transmission wave f2 is matched to the main waveguide 1 by the step converter 5, and is transmitted to the main waveguide 1 without reflection. Moreover, the length of the narrow surface part of the rectangular branch waveguide 3 is the transmission wave f
Since the length is longer than 1/2 of the wavelength of the rectangular branch waveguide 3, the minute transmission wave f2 coupled through the coupling hole 2 can propagate, but is reflected by the thin metal plate 4 provided within the rectangular branch waveguide 3. Therefore, the transmitted wave f is not propagated into the rectangular branch waveguide 3.
逆に、主導波管１に導入された受信波ｆ、は短絡板７に
て反射され、結合孔２を介し矩形分岐導波管３に導かれ
る。Conversely, the received wave f introduced into the main waveguide 1 is reflected by the short circuit plate 7 and guided to the rectangular branch waveguide 3 via the coupling hole 2.
したがって、この構成では矩形分岐導波管３に薄い金属
板４を設けることによりステップ変換部を設ける必要が
なくなり、矩形分岐導波管３の長さを短くして小型化を
達成する。また、この矩形分岐導波管３の狭面部の長さ
を送信波ｒ、の波長の１／２よりも長く形成することに
より、矩形分岐導波管３における微少寸法の設計、加工
を不要にして構造の簡略化を達成する。Therefore, in this configuration, by providing the thin metal plate 4 on the rectangular branch waveguide 3, there is no need to provide a step conversion section, and the length of the rectangular branch waveguide 3 is shortened to achieve miniaturization. In addition, by forming the length of the narrow surface of the rectangular branch waveguide 3 to be longer than 1/2 of the wavelength of the transmitted wave r, it becomes unnecessary to design and process minute dimensions of the rectangular branch waveguide 3. Achieve structural simplification.
ここで、前記実施例では主導波管１が円形の場合につい
て説明したが、正方形導波管でも同様の効果を得ること
ができる。Here, in the above embodiment, the case where the main waveguide 1 is circular has been described, but the same effect can be obtained with a square waveguide.
以上説明したように本発明は、矩形分岐導波管内に低い
周波数帯の電磁波の偏波と直交する方向の薄い金属板を
設けたことにより、この薄い金属板によって高い周波数
帯の電磁波が反射されて矩形分岐導波管内への伝搬が防
止され、これでステップ変換部を不要にし、小型化が実
現できる。また、矩形分岐導波管の狭面部の長さを高い
周波数帯の電磁波の波長の１／２より長くすることで、
構造の簡略化を実現することができる。As explained above, the present invention provides a thin metal plate in a direction perpendicular to the polarization of electromagnetic waves in a low frequency band within a rectangular branch waveguide, so that electromagnetic waves in a high frequency band are reflected by this thin metal plate. This prevents propagation into the rectangular branch waveguide, which eliminates the need for a step converter and allows for miniaturization. In addition, by making the length of the narrow side of the rectangular branch waveguide longer than 1/2 of the wavelength of electromagnetic waves in the high frequency band,
The structure can be simplified.
第１図は本発明の一実施例の一部を破断した斜視図、第
２図は従来例の一部を破断した斜視図である。
１・・・主導波管、２・・・結合孔、３・・・矩形分岐
導波管、４・・・薄い金属板、５・・・ステップ変換部
、６・・・副導波管、７・・・短絡板、８・・・ステッ
プ変換部。
第１図
第２図
！！２・ノ３＝＝÷人４１FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view of a conventional example. DESCRIPTION OF SYMBOLS 1... Main waveguide, 2... Coupling hole, 3... Rectangular branch waveguide, 4... Thin metal plate, 5... Step conversion part, 6... Sub waveguide, 7... Short circuit plate, 8... Step conversion section. Figure 1 Figure 2! ! 2・ノ3==÷people41
Claims (1)
波を伝搬する主導波管と、前記主導波管の一面に開設し
た結合孔を介して接続され低い周波数帯の電磁波を通過
させる矩形分岐導波管と、前記主導波管に直列に接続さ
れ低い周波数帯の電磁波をカットオフする形状の副導波
管と、前記主導波管と副導波管との間に設けて高い周波
数帯の電磁波に対して整合を与えるステップ変換部と、
前記矩形分岐導波管とステップ変換部との間に低い周波
数帯の電磁波の偏波と平行な方向に設けられた短絡板と
で構成し、かつ前記矩形分岐導波管の狭面部の長さを前
記高い周波数帯の電磁波の波長の１／２より長くし、か
つこの矩形分岐導波管内に低い周波数帯の電磁波の偏波
と直交する方向の薄い金属板を設けたことを特徴とする
分波器。1. A main waveguide that propagates electromagnetic waves with mutually orthogonal polarization in multiple high and low frequency bands, and a rectangular branch waveguide that is connected via a coupling hole opened on one side of the main waveguide and allows electromagnetic waves in a low frequency band to pass through. a sub-waveguide connected in series to the main waveguide and having a shape that cuts off electromagnetic waves in a low frequency band, and a sub-waveguide provided between the main waveguide and the sub-waveguide to cut off electromagnetic waves in a high frequency band. a step converter that matches the
a short circuit plate provided between the rectangular branch waveguide and the step conversion section in a direction parallel to the polarization of electromagnetic waves in a low frequency band, and the length of the narrow side part of the rectangular branch waveguide; is longer than 1/2 of the wavelength of the electromagnetic wave in the high frequency band, and a thin metal plate is provided in the rectangular branch waveguide in a direction orthogonal to the polarization of the electromagnetic wave in the low frequency band. Wave equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296888A JPH01273401A (en) | 1988-04-26 | 1988-04-26 | Branching filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296888A JPH01273401A (en) | 1988-04-26 | 1988-04-26 | Branching filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01273401A true JPH01273401A (en) | 1989-11-01 |
Family
ID=14341569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10296888A Pending JPH01273401A (en) | 1988-04-26 | 1988-04-26 | Branching filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01273401A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07321504A (en) * | 1994-03-28 | 1995-12-08 | Nec Corp | Branching filter |
| JP2006352781A (en) * | 2005-06-20 | 2006-12-28 | Institute Of National Colleges Of Technology Japan | Brunched-line polarized wave separator |
| WO2013073674A1 (en) | 2011-11-17 | 2013-05-23 | 三菱電機株式会社 | Polarization coupler |
-
1988
- 1988-04-26 JP JP10296888A patent/JPH01273401A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07321504A (en) * | 1994-03-28 | 1995-12-08 | Nec Corp | Branching filter |
| JP2006352781A (en) * | 2005-06-20 | 2006-12-28 | Institute Of National Colleges Of Technology Japan | Brunched-line polarized wave separator |
| WO2013073674A1 (en) | 2011-11-17 | 2013-05-23 | 三菱電機株式会社 | Polarization coupler |
| KR20140072916A (en) | 2011-11-17 | 2014-06-13 | 미쓰비시덴키 가부시키가이샤 | Polarization coupler |
| US9000861B2 (en) | 2011-11-17 | 2015-04-07 | Mitsubishi Electric Corporation | Polarization coupler |
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