WO2021093016A1 - Filtre de ligne microruban - Google Patents

Filtre de ligne microruban Download PDF

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Publication number
WO2021093016A1
WO2021093016A1 PCT/CN2019/120765 CN2019120765W WO2021093016A1 WO 2021093016 A1 WO2021093016 A1 WO 2021093016A1 CN 2019120765 W CN2019120765 W CN 2019120765W WO 2021093016 A1 WO2021093016 A1 WO 2021093016A1
Authority
WO
WIPO (PCT)
Prior art keywords
microstrip line
line filter
section
accommodating space
filter unit
Prior art date
Application number
PCT/CN2019/120765
Other languages
English (en)
Chinese (zh)
Inventor
赵小伟
Original Assignee
郴州世通科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 郴州世通科技有限公司 filed Critical 郴州世通科技有限公司
Priority to BR112022009162A priority Critical patent/BR112022009162A2/pt
Publication of WO2021093016A1 publication Critical patent/WO2021093016A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters

Definitions

  • the present invention relates to the technical field of filtering, in particular to a microstrip line filter.
  • the outdoor unit of satellite TV signal receiving equipment tuner (Low Noise Block (LNB) is an outdoor unit necessary for the satellite signal transmission system, used for signal amplification and frequency conversion processing of the weak heart blood signal received from the satellite.
  • the satellite tuner contains a band-pass filter to filter frequency signals.
  • a microstrip line filter includes a plurality of linearly arranged microstrip line filter units; each of the microstrip line filter units includes a first microstrip line and a second microstrip line, the first microstrip line
  • the strip line is enclosed to form an accommodating space, the first microstrip line is also provided with an opening communicating with the accommodating space, and one end of the second microstrip line is located in the accommodating space and is connected to The first microstrip line is connected, and the other end of the second microstrip line passes through the opening and protrudes out of the accommodating space.
  • the second microstrip line includes a vertical strip section and a horizontal strip section, one end of the vertical strip section is connected to the first microstrip line, and the other end of the vertical strip section passes through The opening is connected to the horizontal bar section, and the horizontal bar section is located outside the accommodating space.
  • the vertical strip section includes a first section and a second section, one end of the first section is connected to the first microstrip line, and the other end of the first section is connected to the first section. One end of the two sections is connected, and the other end of the second section is connected to the horizontal bar section.
  • the size of the first section is larger or smaller than that of all the microstrip line filter units. State the size of the second paragraph.
  • the second microstrip line is T-shaped or L-shaped.
  • the first microstrip line includes a first surrounding portion and a second surrounding portion, the first surrounding portion and the second surrounding portion are connected to form the accommodating space, and the first The surrounding portion is U-shaped, and the second surrounding portion is provided at the opening and extends along the arrangement direction of the plurality of microstrip line filter units.
  • the opening is located between the two second surrounding parts.
  • two adjacent microstrip line filter units are arranged at intervals.
  • each of the microstrip line filter units includes a first end and a second end that are opposed to each other, the opening is located at the first end, and the microstrip line In the filter unit, the direction from the first end to the second end is opposite.
  • it further includes an input terminal and an output terminal, and a plurality of the microstrip line filter units are all located between the input terminal and the output terminal.
  • the input terminal is connected to the microstrip line filter unit closest to it, and the output terminal is connected to the microstrip line filter unit closest to it; or the input terminal
  • the microstrip line filter unit closest to it is arranged at intervals, and the output end is arranged at intervals to the microstrip line filter unit closest to it.
  • microstrip line filter not only is the coupling between the microstrip line filter units, but also the coupling is formed between the first microstrip line through the opening and the second microstrip line in the same microstrip line filter unit.
  • the traditional microstrip line filter the microstrip line filter has strong out-of-band suppression function for ultra-near frequencies, and improves the Q value of the filter.
  • FIG. 1 is a schematic diagram of the structure of a microstrip line filter in an embodiment
  • FIG. 2 is a schematic diagram of the structure of a microstrip line filter in another embodiment
  • FIG. 3 is a schematic structural diagram of a microstrip line filter unit in the microstrip line filter shown in FIG. 1;
  • FIG. 4 is a schematic diagram of the structure of a first microstrip line in an embodiment
  • FIG. 5 is a schematic structural diagram of a microstrip line filter in another embodiment
  • Fig. 6 is an S(2,1) simulation experiment diagram of the microstrip line filter shown in Fig. 1;
  • Fig. 7 is the S(1,1) simulation experiment diagram of the microstrip line filter shown in Fig. 1.
  • the microstrip line filter includes a plurality of linearly arranged microstrip line filter units 10.
  • the microstrip line filter includes 3-7 microstrip line filters.
  • the number of microstrip filter units 10 is 5.
  • the number of microstrip filter units 10 may also be 3, 4, or 6. the above. You can customize the number of microstrip filter units according to actual needs.
  • each of the microstrip line filter units 10 includes a first microstrip line 102 and a second microstrip line 104.
  • the first microstrip line The line 102 encloses an accommodating space 106
  • the first microstrip line is also provided with an opening 108 communicating with the accommodating space 106
  • one end of the second microstrip line 104 is located in the accommodating space It is connected to the first microstrip line 102, and the other end of the second microstrip line passes through the opening 108 and protrudes out of the accommodating space 106.
  • the above-mentioned microstrip line filter is used as a band-pass filter, and its function is to allow only the set frequency range to pass and filter out other frequencies.
  • the second microstrip line 104 is realized by a quarter-wavelength open-circuit transmission line with high and low impedance conversion, so that attenuation transmission zeros are generated at the edge of the passband, and the cutoff slope of the passband is steeper to improve the microstrip.
  • the selectivity of the stripline filter is not only is the coupling between the microstrip line filter units 10 formed, but the first microstrip line 102 in each microstrip line filter unit 10 passes through the opening to communicate with the second microstrip line 104. A coupling is also formed between them.
  • the microstrip line filter has a strong out-of-band suppression function for the ultra-close frequency, which improves the Q value of the microstrip line filter.
  • each of the microstrip line filter unit includes a first end 110 and a second end 120 that are oppositely disposed, and the opening 108 is located at the first end 110, and is located at two adjacent ends.
  • the directions of the first end 110 to the second end 120 are opposite. Taking the viewing angle as shown in FIG. 5, for the first microstrip line filter unit 10 on the left, its first end 110 is located above the second end 120, and for the second microstrip line filter unit on the left For the device unit 10, the first end 110 is located below the second end 120, and so on.
  • the arrangement positions of the first end 110 and the second end 120 of the microstrip line filter unit at the same position may be the same or different.
  • the first end 110 is located below the second end 120, and for the second microstrip line filter unit 10 on the left, the first end 110 is located above the second end 120.
  • the first microstrip line includes a first surrounding portion 1022 and a second surrounding portion 1024, the first surrounding portion 1022 and The second enclosing portion 1024 is connected to form the accommodating space 106, the first enclosing portion 1022 is U-shaped, and the second enclosing portion 1024 is provided at the opening 108 and runs along a plurality of the microstrips.
  • the arrangement direction of the line filter unit 10 extends.
  • the arrangement of the second surrounding portion 1024 can reduce the size of the opening, so that the microstrip line filter can better achieve the effect of suppressing the ultra-near frequency band.
  • the extension size of the second enclosing portion can be determined according to the actual situation, so as to determine the position and size of the opening.
  • each microstrip line filter unit 10 has two second surrounding parts 1024, and the opening is located between the two second surrounding parts.
  • FIG. 2 there are two second surrounding parts 1024 of part of the microstrip line filter unit 10, and only one second surrounding part 1024 of the part of the microstrip line filter unit 10 is provided. More specifically, taking FIG. 2 as the viewing angle of view, in the leftmost microstrip line filter unit and the rightmost microstrip line filter unit, only one second enclosing part 1024 is provided, and in the remaining microstrip line filter unit In the stripline filter unit, there are two second surrounding parts.
  • the second surrounding portion may also be omitted.
  • the second microstrip line includes a vertical strip segment 1042 and a horizontal strip segment 1044, one end of the vertical strip segment 1042 is connected to the first microstrip line 102, and the vertical strip segment The other end of 1042 passes through the opening 108 and is connected to the horizontal bar section 1044, and the horizontal bar section 1044 is located outside the accommodating space 106. More specifically, the vertical bar section 1042 is centrally disposed in the first surrounding portion 1022, the vertical bar section 1044 extends in a direction perpendicular to the arrangement of the microstrip line filter units, and the horizontal bar section 1044 is parallel to the microstrip line filter unit.
  • the arrangement direction extends, that is, the extending direction of the vertical strip section 1042 is perpendicular to the extending direction of the horizontal strip section 1044. While not affecting the function of the microstrip line filter to suppress the ultra-near frequency band, the positional relationship of the vertical bar section relative to the first enclosing part and the relative relationship between the vertical bar section and the horizontal bar section can be reduced as much as possible. The printing area occupied by the microstrip line filter.
  • the second microstrip line is T-shaped, that is, the connection position of the vertical strip section 1042 and the horizontal strip section 1044 is located between the two ends of the horizontal strip section 1044.
  • the connecting position of the vertical bar section and the horizontal bar section may be centered on the two ends of the horizontal bar section, or the distance from one end of the horizontal bar section is small, and the distance from the other end of the horizontal bar section is relatively large.
  • the second microstrip line is L-shaped, that is, the vertical strip section is connected to one end of the horizontal strip section.
  • the widths of different parts of the vertical stripe section are not the same.
  • the width of the vertical stripe section mentioned here refers to the arrangement of the filter unit along the microstrip line. The size in the direction.
  • the vertical bar segment includes a first segment 1042A and a second segment 1042B.
  • One end of the first segment 1042A is connected to the first microstrip line 102, and the other end of the first segment 1042A It is connected to one end of the second section 1042B, and the other end of the second section 1042B is connected to the horizontal bar section 1044.
  • the width of the first section 1042A is greater than the width of the second section 1042B.
  • the width of the first section is smaller than the width of the second section (not shown in the figure).
  • the vertical strip segment may also have the same width from its end connected to the first microstrip line to its end connected to the horizontal strip segment.
  • each microstrip line filter unit may be completely the same or different.
  • the structure of each microstrip line filter unit can be determined according to the actual application of the microstrip line filter.
  • the microstrip line filter further includes an input terminal 20 and an output terminal 30, and a plurality of the microstrip line filter units 10 are all located between the input terminal 20 and the output terminal 30 between.
  • the input end 20 and the closest microstrip line filter unit 10 are arranged at intervals, and the output end 30 and the closest microstrip line filter unit 10 are arranged at intervals.
  • Unit 10 is arranged at intervals.
  • the input terminal 20 is connected to the microstrip line filter unit 10 closest to it, and the output terminal 30 is connected to the microstrip line filter unit closest to it. .
  • the input terminal 20 can also be connected to the microstrip line filter unit 10 closest to it, and the output terminal 30 is connected to the closest microstrip line filter unit 10 to it.
  • the input terminal 20 and the closest microstrip line filter unit 10 may also be arranged at intervals, and the output terminal 30 and the closest microstrip line filter unit 10 may be arranged at intervals.
  • the device units 10 are arranged at intervals.
  • adjacent microstrip line filter units 10 are arranged at intervals, that is, there is a distance between the microstrip line filter units, and the distance between the microstrip line filter units can be adjusted by The separation distance to adjust the receiving frequency bandwidth.
  • the separation distance between different microstrip line filter units can be the same or different, and specifically can be adaptively adjusted according to actual needs.
  • the microstrip line filter can be applied to the ultra-close frequency filtering of different frequency bands, for example, it is suitable for the C-BAND frequency band of the outdoor unit of satellite TV signal reception, and it is also suitable for the 5G frequency band, as well as the KU-BAND frequency band and the KA-BAND frequency band. For different frequency bands, it is necessary to customize the separation distance between the microstrip line filter units and the size of the first microstrip line and the second microstrip line.
  • the microstrip line filter is applied to the C-BAND tuner circuit configuration part of the satellite TV signal receiving outdoor unit, and is set in the tuner circuit box.
  • the out-of-band suppression effect especially for LTE and 5G signals, it has a significant out-of-band strong suppression.
  • Using the above-mentioned microwave filters (as shown in Figures 1 and 2) can achieve strong out-of-band suppression effects, especially ultra-close frequency suppression.
  • adjusting the line length according to the actual frequency and range in the actual application scenario can extend the application frequency, for example, it can be applied to the KU-BAND and KA-BAND frequency bands.
  • the KU-BAND frequency band applied to the direct-broadcast satellite TV broadcasting service ranges from 10 GHz to 15 GHz
  • the KA-BAND frequency band applied to the direct-broadcast satellite TV broadcasting service ranges from 18 to 28 GHz.
  • the frequency of the traditional C-BAND satellite is generally between 3.63-4.2GHz or 3.7 ⁇ 4.2GHz.
  • the above-mentioned microstrip line filter can achieve a frequency separation of 3.7GHz relative to 3.6GHz 100MHz, and adjacent frequency suppression can reach 50dB or more.
  • External suppression capability, 3.65GHz is relative to 3.6GHz
  • the 50MHz frequency interval ultra-close frequency suppression achieves an out-of-band suppression capability of more than 45dB, which can completely solve the impact of LTE signals and 5G signals on C-BAND direct broadcast satellite broadcast TV signals.
  • the input terminal 20 and the closest microstrip line filter unit (the first microstrip line filter unit)
  • the separation distance is set to 6-16mil (mil, mil, length unit)
  • the separation distance between the first microstrip line filter unit and the second microstrip line filter unit is set to 16-30mil
  • the second The separation distance between the microstrip line filter unit and the third microstrip line filter unit is set to 18-36mil
  • the distance between the third microstrip line filter unit and the fourth microstrip line filter unit The distance is set to 18-36mil
  • the separation distance between the fourth microstrip line filter unit and the fifth microstrip line filter unit is set to 16-30mil
  • the separation distance between is set to 6-16mil.
  • FIG. 6 and FIG. 7 it is a simulation schematic diagram of a microstrip line filter used in a satellite TV signal receiving outdoor unit C-BAND tuner in an embodiment, the abscissa represents the insertion loss, and the ordinate represents the frequency;
  • Fig. 6 is a simulation diagram obtained on the basis of S(2,1)
  • Fig. 7 is a simulation diagram obtained on the basis of S(1,1).
  • S(2,1) represents the transmission coefficient
  • S(1,1) represents the self-reflection coefficient, so the simulation images obtained by S(2,1) and S(1,1) are just the opposite.
  • the abscissa difference is 50MHz, the ordinate difference is more than 47dB, the coordinates of m5 and m7 in the figure, the abscissa difference is 100MHz, and the ordinate difference is more than 55dB.
  • the microstrip line filter has strong ultra-close frequency suppression.
  • the ultra-close frequency 50MHz interval suppression can reach more than 45dB, and the ultra-close frequency 100MHz frequency interval suppression can reach more than 50dB, which is extremely superior.
  • the microstrip filter can be made by PCB circuit microstrip line to achieve ultra-close frequency interference suppression, low cost, and simpler and more efficient mass production.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

La présente invention concerne un filtre de ligne microruban, comprenant une pluralité d'unités de filtre de ligne microruban disposées de façon linéaire ; chaque unité de filtre de ligne microruban comprenant une première ligne microruban et une seconde ligne microruban, la première ligne microruban étant enfermée de façon à former un espace de réception, la première ligne microruban étant également pourvue d'une ouverture communiquant avec l'espace de réception, une extrémité de la seconde ligne microruban étant située dans l'espace de réception et étant connectée à la première ligne microruban, l'autre extrémité de la seconde ligne microruban traversant l'ouverture et faisant saillie hors de l'espace de réception. Le filtre de ligne microruban a une fonction de réjection hors bande à fréquence ultra-étroite, ce qui améliore la valeur Q du filtre de ligne microruban.
PCT/CN2019/120765 2019-11-12 2019-11-26 Filtre de ligne microruban WO2021093016A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR112022009162A BR112022009162A2 (pt) 2019-11-12 2019-11-26 Filtro de microfita

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911102724.6 2019-11-12
CN201911102724.6A CN110931926B (zh) 2019-11-12 2019-11-12 微带线滤波器

Publications (1)

Publication Number Publication Date
WO2021093016A1 true WO2021093016A1 (fr) 2021-05-20

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Application Number Title Priority Date Filing Date
PCT/CN2019/120765 WO2021093016A1 (fr) 2019-11-12 2019-11-26 Filtre de ligne microruban

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CN (1) CN110931926B (fr)
BR (1) BR112022009162A2 (fr)
WO (1) WO2021093016A1 (fr)

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP1265310A1 (fr) * 2000-01-28 2002-12-11 Fujitsu Limited Filtre a microrubans supraconducteurs
KR20050081022A (ko) * 2004-02-12 2005-08-18 학교법인 포항공과대학교 원자층 화학 증착법에 의한 금속 실리 알루미네이트박막의 제조방법
CN101599564A (zh) * 2009-07-09 2009-12-09 华南理工大学 可控电磁耦合微带开口环谐振器滤波器
CN205680768U (zh) * 2016-06-27 2016-11-09 成都信息工程大学 微带开环滤波器
CN110416670A (zh) * 2019-06-21 2019-11-05 佳木斯大学 具有小型化双模带通滤波器及其组成的多阶带通滤波器

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EP1296406A1 (fr) * 2001-09-21 2003-03-26 Alcatel Suppression en mode parasite de type seconde harmonique en résonateurs à demi-ondes appliquée à des structures de filtre à micro-ondes
US7688162B2 (en) * 2006-11-16 2010-03-30 Harris Stratex Networks, Inc. Hairpin microstrip bandpass filter
CN102255123A (zh) * 2011-05-10 2011-11-23 清华大学 一种含有抽头结构的高温超导微带滤波器
CN102361110B (zh) * 2011-10-08 2013-09-04 上海大学 小型化双模双频微带滤波器
CN202523821U (zh) * 2012-02-29 2012-11-07 南京航空航天大学 一种超宽带滤波器
CN202977666U (zh) * 2012-11-22 2013-06-05 成都九洲迪飞科技有限责任公司 高选择性阶跃阻抗线滤波器
CN204333186U (zh) * 2014-12-24 2015-05-13 南京信息工程大学 一种发夹交叉耦合带通滤波器
CN208862135U (zh) * 2018-10-12 2019-05-14 南京屹信航天科技有限公司 一种用于小型化odu接收通道的本振滤波器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1265310A1 (fr) * 2000-01-28 2002-12-11 Fujitsu Limited Filtre a microrubans supraconducteurs
KR20050081022A (ko) * 2004-02-12 2005-08-18 학교법인 포항공과대학교 원자층 화학 증착법에 의한 금속 실리 알루미네이트박막의 제조방법
CN101599564A (zh) * 2009-07-09 2009-12-09 华南理工大学 可控电磁耦合微带开口环谐振器滤波器
CN205680768U (zh) * 2016-06-27 2016-11-09 成都信息工程大学 微带开环滤波器
CN110416670A (zh) * 2019-06-21 2019-11-05 佳木斯大学 具有小型化双模带通滤波器及其组成的多阶带通滤波器

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CN110931926B (zh) 2022-01-07
BR112022009162A2 (pt) 2022-07-26
CN110931926A (zh) 2020-03-27

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