JPH0371702A - Microstrip line low pass filter - Google Patents
Microstrip line low pass filterInfo
- Publication number
- JPH0371702A JPH0371702A JP20827289A JP20827289A JPH0371702A JP H0371702 A JPH0371702 A JP H0371702A JP 20827289 A JP20827289 A JP 20827289A JP 20827289 A JP20827289 A JP 20827289A JP H0371702 A JPH0371702 A JP H0371702A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- attenuation pole
- pass filter
- attenuation
- stub
- 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
- 230000001939 inductive effect Effects 0.000 claims description 6
- 230000002238 attenuated effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマイクロストリップラインで構成される低域ろ
波器に関し、特に２つの異なる帯域の高周波を除去する
ことができる低域ろ波器に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a low-pass filter composed of microstrip lines, and particularly relates to a low-pass filter capable of removing high frequencies in two different bands. .
従来、マイクロストリップラインで構成される低域ろ波
器として、第３図に示す構成のものがある。図において
、１は人力線路、２は出力線路、３Ａはこれらの間に構
成したフィルタ部である。2. Description of the Related Art Conventionally, there is a low-pass filter constructed from a microstrip line having a configuration shown in FIG. In the figure, 1 is a human power line, 2 is an output line, and 3A is a filter section constructed between these lines.
このフィルタ部３Ａは、誘導性線路１０，１１゜１２と
容量性線路１３．１４で構成されている。This filter section 3A is composed of inductive lines 10, 11, 12 and capacitive lines 13, 14.
そして、この低域ろ波器において、特定の高周波帯域を
減衰するために、入力線路１と出力線路２の各一部に減
衰極を構成するスタブ４をそれぞれ形成している。この
スタブ４の減衰極を前記特定の高周波帯域に合わせて形
成することにより、第４図に示すように、その特定帯域
を減衰させた減衰特性を得ることができる。In this low-pass filter, in order to attenuate a specific high frequency band, stubs 4 constituting attenuation poles are formed in each part of the input line 1 and the output line 2. By forming the attenuation pole of the stub 4 to match the specific high frequency band, it is possible to obtain an attenuation characteristic in which the specific band is attenuated, as shown in FIG.
上述した従来の低域ろ波器は、スタブ４からなる減衰極
によって特定の高周波帯域の減衰は可能であるが、減衰
したい帯域が２つある場合には、一方の帯域に減衰極を
合わせるため、他方の高周波帯域については減衰するこ
とができないという問題がある。The conventional low-pass filter described above can attenuate a specific high frequency band using the attenuation pole made up of the stub 4, but if there are two bands to be attenuated, it is necessary to adjust the attenuation pole to one of the bands. , there is a problem that the other high frequency band cannot be attenuated.
本発明の目的は２つの帯域の高周波をそれぞれ有効に減
衰することが可能な低域ろ波器を提供することにある。An object of the present invention is to provide a low-pass filter that can effectively attenuate high frequencies in two bands.
（課題を解決するための手段〕
本発明の低域ろ波器は、入出力線路の一部に一の周波数
の減衰極を形成するスタブを形成し、かつフィルタ部の
減衰極の周波数を前記周波数とは別の周波数に設定して
いる。(Means for Solving the Problems) The low-pass filter of the present invention has a stub forming an attenuation pole of one frequency in a part of the input/output line, and the frequency of the attenuation pole of the filter section is set to the above-mentioned frequency. The frequency is set to a different frequency.
この構成では、スタブとフィルタ部の各減衰極により、
２つの異なる帯域の高周波を減衰することが可能となる
。In this configuration, each attenuation pole of the stub and filter section
It becomes possible to attenuate high frequencies in two different bands.
（実施例〕 次に、本発明を図面を参照して説明する。(Example〕 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の平面図である。図において
、１は人力線路、２は出力線路、３はこれらの間に構成
したフィルタ部である。このフィルタ部３は、誘導性線
路５，６．７と容量性線路８．９で構成されている。ま
た、前記入力線路１と出力線路２の各一部にはそれぞれ
一の減衰極を構成するスタブ４を形威している。FIG. 1 is a plan view of one embodiment of the present invention. In the figure, 1 is a human power line, 2 is an output line, and 3 is a filter section constructed between these lines. This filter section 3 is composed of inductive lines 5, 6.7 and capacitive lines 8.9. Further, each part of the input line 1 and the output line 2 has a stub 4 forming one attenuation pole.
ここで、前記スタブ４からなる減衰極は、減衰を希望す
る一の高周波帯域（周波数ｒ＋）に合わせて形威してい
る。また、これと同時にフィルタ部３は減衰を希望する
他の高周波帯域（周波数ｆｚ）が減衰極となるように形
威している。Here, the attenuation pole formed by the stub 4 is shaped in accordance with one high frequency band (frequency r+) in which attenuation is desired. At the same time, the filter section 3 is configured so that another high frequency band (frequency fz) desired to be attenuated becomes an attenuation pole.
例えば、ここでは、スタブ１の極の周波数ｆ。For example, here the frequency f of the pole of stub 1.
を減衰周波数ｆｏの２倍波に合わせ、フィルタ部３の極
の周波数ｒ２を３倍波に合わせている。この結果、この
低域ろ波器の周波数対減衰量特性は、第２図に示すよう
に、周波数ｆｏの２倍波及び３倍波を共に減衰すること
が可能となる。is adjusted to the second harmonic of the attenuation frequency fo, and the frequency r2 of the pole of the filter section 3 is adjusted to the third harmonic. As a result, the frequency vs. attenuation characteristic of this low-pass filter makes it possible to attenuate both the second and third harmonics of the frequency fo, as shown in FIG.
なお、前記実施例では、フィルタ部を構成する誘導性線
路と容量性線路がそれぞれ３個、２個の場合について説
明したが、これ以外の構成のフィルタ部を有するろ波器
においても本発明を同様に適用できることはいうまでも
ない。In the above embodiment, the case where the number of inductive lines and capacitive lines constituting the filter section was three and two, respectively, was explained, but the present invention can also be applied to a filter having a filter section with other configurations. Needless to say, the same can be applied.
以上説明したように本発明は、入出力線路の一部に一の
周波数の減衰極を形成するスタブを形威し、かつフィル
タ部は別の周波数の減衰極に設定しているので、２つの
異なる帯域の高周波を減衰することができる低域ろ波器
を得ることができる。As explained above, in the present invention, a part of the input/output line is formed with a stub that forms an attenuation pole of one frequency, and the filter part is set to an attenuation pole of another frequency, so that two A low-pass filter that can attenuate high frequencies in different bands can be obtained.
第１図は本発明の一実施例の平面図、第２図は第１図の
低域ろ波器の周波数対減衰量特性図、第３図は従来の低
域ろ波器の平面図、第４図は第３図の低域ろ波器の周波
数対減衰量特性図である。
■・・・入力線路、２・・・出力線路、３．３Ａ・・・
フィルタ部、４・・・スタブ、５〜７・・・誘導性線路
、８．９・・・容量性線路、１０−１２・・・誘導性線
路、１３．１４・・・容量性線路。
第１図
５、６．７ 誰阜１工１虚路
第２図
０
２ｆ。
３ｆ、 ４ｆ。 ５ｆ。
固７ゐにFIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a frequency vs. attenuation characteristic diagram of the low-pass filter of FIG. 1, and FIG. 3 is a plan view of a conventional low-pass filter. FIG. 4 is a frequency versus attenuation characteristic diagram of the low-pass filter of FIG. 3. ■...Input line, 2...Output line, 3.3A...
Filter section, 4... Stub, 5-7... Inductive line, 8.9... Capacitive line, 10-12... Inductive line, 13.14... Capacitive line. Figure 1 5, 6.7 Who Fu 1 Engineering 1 Hiroji Figure 2 0 2f. 3f, 4f. 5f. firmly at 7゜
Claims (1)
線路からなるフィルタ部を構成した低域ろ波器において
、前記入出力線路の一部に一の周波数の減衰極を形成す
るスタブを形成し、かつ前記フィルタ部の減衰極の周波
数を前記一の周波数とは別の周波数に設定したことを特
徴とするマイクロストリップライン低域ろ波器。1. In a low-pass filter in which a filter section consisting of an inductive line and a capacitive line is configured between an input line and an output line, a stub forming an attenuation pole of one frequency is formed in a part of the input/output line. A microstrip line low-pass filter characterized in that the frequency of the attenuation pole of the filter section is set to a frequency different from the one frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20827289A JPH0371702A (en) | 1989-08-11 | 1989-08-11 | Microstrip line low pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20827289A JPH0371702A (en) | 1989-08-11 | 1989-08-11 | Microstrip line low pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0371702A true JPH0371702A (en) | 1991-03-27 |
Family
ID=16553496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20827289A Pending JPH0371702A (en) | 1989-08-11 | 1989-08-11 | Microstrip line low pass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0371702A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5805034A (en) * | 1995-03-17 | 1998-09-08 | Lucent Technologies Inc. | Microstrip patch filters |
| US6624728B2 (en) * | 2000-01-31 | 2003-09-23 | Mitsubishi Denki Kabushiki Kaisha | Low-pass filter |
| JP2006067281A (en) * | 2004-08-27 | 2006-03-09 | Matsushita Electric Ind Co Ltd | Antenna switch module |
| KR101007543B1 (en) * | 2010-02-11 | 2011-01-14 | 주식회사 이너트론 | Manufacturing Method of Ultra Wideband Frequency Stopping Microstrip Lowpass Filter Combined with Metacell |
| WO2016086852A1 (en) * | 2014-12-01 | 2016-06-09 | Huawei Technologies Co., Ltd. | Millimeter wave dual-mode diplexer and method |
-
1989
- 1989-08-11 JP JP20827289A patent/JPH0371702A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5805034A (en) * | 1995-03-17 | 1998-09-08 | Lucent Technologies Inc. | Microstrip patch filters |
| US6624728B2 (en) * | 2000-01-31 | 2003-09-23 | Mitsubishi Denki Kabushiki Kaisha | Low-pass filter |
| JP2006067281A (en) * | 2004-08-27 | 2006-03-09 | Matsushita Electric Ind Co Ltd | Antenna switch module |
| KR101007543B1 (en) * | 2010-02-11 | 2011-01-14 | 주식회사 이너트론 | Manufacturing Method of Ultra Wideband Frequency Stopping Microstrip Lowpass Filter Combined with Metacell |
| WO2016086852A1 (en) * | 2014-12-01 | 2016-06-09 | Huawei Technologies Co., Ltd. | Millimeter wave dual-mode diplexer and method |
| US9660316B2 (en) | 2014-12-01 | 2017-05-23 | Huawei Technologies Co., Ltd. | Millimeter wave dual-mode diplexer and method |
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