WO2019216559A1 - Symétriseur lc - Google Patents

Symétriseur lc Download PDF

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Publication number
WO2019216559A1
WO2019216559A1 PCT/KR2019/004359 KR2019004359W WO2019216559A1 WO 2019216559 A1 WO2019216559 A1 WO 2019216559A1 KR 2019004359 W KR2019004359 W KR 2019004359W WO 2019216559 A1 WO2019216559 A1 WO 2019216559A1
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WO
WIPO (PCT)
Prior art keywords
concentrator
transmission line
balun
port
type
Prior art date
Application number
PCT/KR2019/004359
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English (en)
Korean (ko)
Inventor
안달
이대웅
장유나
구서
Original Assignee
순천향대학교 산학협력단
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Application filed by 순천향대학교 산학협력단 filed Critical 순천향대학교 산학협력단
Publication of WO2019216559A1 publication Critical patent/WO2019216559A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/175—Series LC in series path

Definitions

  • the present invention relates to an LC balun composed of an inductor (L) and a capacitor (C), and more particularly to an LC balun having excellent phase and amplitude balance characteristics in a wide band.
  • baluns for converting a balanced signal into an unbalanced signal or an unbalanced signal into a balanced signal.
  • Wireless communication systems requiring such baluns generally include a double-balanced mixer, a push-pull amplifier, and the like.
  • Baluns required in wireless communication systems should have a small size and good phase and amplitude balance characteristics over a wide band. In order to satisfy this demand, various forms of balun have been studied.
  • the representative balun structure is the simplest form of balun Transmission line having electrical length of Two-line balun consisting of transmission line with electrical length of The three-line balun consisting of three transmission lines having an electrical length of, and the Marchand balun consisting of two coupled sections.
  • this type of balun has the disadvantage of having a very narrow bandwidth with phase and amplitude balance characteristics.
  • this type of balun has the disadvantage of having a very narrow bandwidth with phase and amplitude balance characteristics.
  • Still another object is to provide a first LC concentrator equivalent to a transmission line having a first electrical length, a second LC concentrator equivalent to a transmission line having a second electrical length, and a first LC concentrator to the first and second LC concentrators. It is to provide an LC balun including additional LC resonant circuits.
  • a first LC concentrator configured using a ⁇ -type CLC concentrator equivalent to a first transmission line having a first electrical length, and the first LC concentrator A first LC circuit portion including a first LC resonant circuit added to the device; And a second LC concentrator formed using a ⁇ -type LCL concentrator equivalent to a second transmission line having a second electrical length, and a second LC resonant circuit added to the second LC concentrator.
  • An LC balun comprising a circuit portion is provided.
  • the first transmission line A transmission line having an electrical length of Characterized in that the transmission line having an electrical length of.
  • the second transmission line may have the same impedance as the first transmission line.
  • the first LC circuit portion is disposed between the first port and the second port, and the second LC circuit portion is disposed between the first port and the third port.
  • the first and second LC circuit unit is implemented through low temperature co-fired ceramic (Low-Temperature-Co-fired-Ceramic, LTCC) technology.
  • the first LC concentrator is configured by removing a capacitor connected to a first port in a ⁇ -type CLC concentrator
  • the second LC concentrator is an inductor connected to a first port in a ⁇ -type LCL concentrator. Characterized in that it is configured to remove.
  • the inductor of the first LC concentrator is composed of two inductors divided into two, and the first LC resonant circuit is added between the two inductors.
  • the capacitor of the second LC concentrator is composed of two bisected capacitors, and the second LC resonant circuit is characterized in that it is added between the two capacitors.
  • the inductor and capacitor values of the ⁇ -type CLC lumped element are , It is characterized in that calculated through.
  • the inductor and capacitor values of the ⁇ -type LCL concentrator are expressed as , It is characterized in that calculated through.
  • the inductor and capacitor values of the second LC resonant circuit are the same as the inductor and capacitor values of the first LC resonant circuit.
  • the inductor and capacitor values of the first and second LC resonant circuits are Characterized by satisfying.
  • the first and second LC resonant circuit is characterized in that the LC parallel resonant circuit.
  • the first LC circuit portion comprising a ⁇ -type CLC concentrator equivalent to the first transmission line having a first electrical length, and a first LC resonant circuit added to the ⁇ -type CLC concentrator; And a second LC circuit portion including a ⁇ LCL concentrator equivalent to a second transmission line having a second electrical length, and a second LC resonant circuit added to the ⁇ LCL concentrator.
  • the inductor of the ⁇ -type CLC concentrator is composed of two inductors divided into two, and the first LC resonant circuit is added between the two inductors.
  • the capacitor of the ⁇ -type LCL concentrator is composed of two equally divided capacitors, and the second LC resonant circuit is added between the two capacitors.
  • an existing balun Compared to the above, there is an advantage in that it can have a very good phase balance characteristic and amplitude balance characteristic in a wide band.
  • the effect that can be achieved by the LC balun according to the embodiments of the present invention is not limited to those mentioned above, and other effects that are not mentioned from the following description is a common knowledge in the art to which the present invention belongs. It will be clearly understood by those who have it.
  • 1 is a configuration diagram of a balun consisting of two transmission lines having different electrical lengths
  • FIGS. 2A to 2C are views referred to for explaining a process of obtaining a ⁇ -type CLC lumped element equivalent to a transmission line;
  • 3A to 3C are views referred to for explaining a process of finding a? -Type LCL concentrator equivalent to a transmission line;
  • FIG. 4 shows an LC circuit equivalent to the balun of FIG. 1 and the S parameter characteristics of the circuit
  • FIG. 5 is a diagram showing an LC circuit from which the L / C connected to the first port is removed in the LC circuit of FIG. 4 and the S parameter characteristics of the corresponding circuit;
  • FIG. 6 illustrates a circuit structure of an LC balun according to an embodiment of the present invention
  • FIG. 7 illustrates a circuit structure in which the third port of FIG. 6 is terminated with Z 0 ;
  • FIG. 8 is a diagram comparing a passing signal between a balloon and a conventional balloon according to the present invention.
  • FIG. 9 is a view comparing the reflected signal between the balun and the existing balun according to the present invention.
  • FIG. 10 is a diagram comparing a phase difference between a balloon and a conventional balloon according to the present invention.
  • FIG. 11 illustrates a circuit structure of an LC balun according to another embodiment of the present invention.
  • FIG. 12 illustrates an LC balun implemented via an LTCC structure.
  • the present invention Transmission line having electrical length of
  • 1 is a configuration diagram of a balun consisting of two transmission lines having different electrical lengths.
  • the balun 100 of the simplest form of the existing balun A first transmission line 110 having an electrical length of It consists of a second transmission line 120 having an electrical length of.
  • the balun 100 branches the first signal S 1 input from the first port P 1 into two signals and outputs a second signal S 2 toward the second port P 2 .
  • the third signal S 3 may be output in the direction of the third port P 3 .
  • the second signal S 2 output in the direction of the second port P 2 and the third signal S 3 output in the direction of the third port P 3 are 180 degrees at the center frequency f 0 . Have a difference.
  • this type of balloon 100 has a problem that the size is very large due to the two transmission lines (110, 120).
  • the size of the balun can be reduced by converting the two transmission lines 110 and 120 into a ⁇ -type LC concentrator.
  • the ⁇ -type LC concentrator includes a ⁇ -type CLC concentrator and a ⁇ -type LCL concentrator.
  • 2A to 2C are diagrams for explaining a process of obtaining a ⁇ -type CLC lumped element equivalent to a transmission line.
  • the transmission line 210 having a specific impedance value may be converted into a ⁇ -type CLC concentrator (or ⁇ -type CLC circuit 220) having a specific passive element value.
  • the transmission line 210 and the ⁇ -type CLC concentrator 220 are converted into an Even mode and an Odd mode, so that L / of the ⁇ -type CLC concentrator 220 satisfying an equivalent relationship with the transmission line 210. You can get the C value.
  • the input admittance (Y in ) of the transmission line 210 may be defined as Equation 1 below, and the input admittance (Y ′ in ) of the ⁇ -type CLC concentrator 220 may be defined by Equation 2 below.
  • Y 0 is the admittance of the transmission line and ⁇ is the electrical length of the transmission line.
  • the input admittance (Y in ) of the transmission line 210 may be defined as Equation 4 below, and the input admittance (Y ′ in ) of the ⁇ -type CLC concentrator 220 may be defined as follows. It can be defined as 5. Since the input admittance Y in of the transmission line 210 and the input admittance Y ' in of the ⁇ -type CLC concentrator 220 are the same, the inductor value of the ⁇ -type CLC concentrator 220 is It can be calculated as shown in Equation 6.
  • Z 0 is the impedance of the transmission line and ⁇ is the electrical length of the transmission line.
  • the impedance is L / C values of the ⁇ -type CLC concentrator 220 having an equivalent relationship with the P transmission line 210 may be obtained.
  • 3A to 3C are views referred to for explaining a process of obtaining a ⁇ -type LCL lumped element equivalent to a transmission line.
  • the transmission line 310 having a specific impedance value may be converted into a ⁇ -type LCL concentrator (or ⁇ -type LCL circuit 320) having a specific passive element value.
  • the transmission line 310 and the ⁇ -type LCL concentrator 320 are converted into an Even mode and an Odd mode, so that L / of the ⁇ -type LCL concentrator 320 satisfying an equivalent relationship with the transmission line 310 is satisfied. You can get the C value.
  • the input admittance (Y in ) of the transmission line 310 may be defined as Equation 7 below, and the input admittance (Y ′ in ) of the ⁇ -type LCL concentrator 320 may be defined by Equation 8 below.
  • the input admittance (Y in ) of the transmission line 310 can be defined as Equation 10 below, and the input admittance (Y ' in ) of the ⁇ -type LCL concentrator 320 is It can be defined as 11. Since the input admittance (Y in ) of the transmission line 310 and the input admittance (Y ' in ) of the ⁇ -type LCL concentrator 320 are the same, the capacitor value of the ⁇ -type LCL concentrator 320 is expressed by the following equation. It can be calculated as Equation 12.
  • the impedance is L / C values of the ⁇ -type LCL concentrator 320 having an equivalent relationship with the P transmission line 310 may be obtained.
  • FIG. 4 is a diagram showing an LC circuit equivalent to the balun of FIG. 1 and the S parameter characteristics of the circuit.
  • the first LC circuit 400 equivalent to the balun of FIG. ⁇ -type CLC concentrator 410 equivalent to the first transmission line 110 having an electrical length of It may include a ⁇ -type LCL concentrator 420 equivalent to the second transmission line 210 having an electrical length of.
  • the ⁇ -type CLC concentrator 410 may be disposed between the first port and the second port, and the ⁇ -type CLC concentrator 420 may be disposed between the first port and the third port.
  • the? Type CLC concentrator 410 is disposed between the first port and the third port, and the? Type LCL concentrator 420 is disposed between the first port and the second port. It may be.
  • the value of the inductor L and the capacitor C constituting the ⁇ -type CLC concentrator 410 may be calculated through the above Equations 3 and 6, and the inductor constituting the ⁇ -type LCL concentrator 420.
  • the values of (L) and capacitor (C) may be calculated by using Equations 9 and 12 described above.
  • the impedance values Z of the first transmission line 110 and the second transmission line 120 are equal to each other, and the electrical lengths of the first transmission line 110 and the second transmission line 120 are different from each other.
  • the second LC circuit is configured by removing the inductor L 1 and the capacitor C 1 connected to the first port from the first LC circuit 400. can do.
  • FIG. 5 is a diagram illustrating an LC circuit in which an inductor and a capacitor connected to a first port and an S parameter of the corresponding circuit are removed in the LC circuit of FIG. 4.
  • the second LC circuit 500 may include a first LC concentrator 510 in which the capacitor C 1 connected to the first port is removed from the ⁇ -type CLC concentrator 410 of FIG. 4.
  • the ⁇ -type LCL concentrator 420 of FIG. 4 may include a second LC concentrator 520 from which the inductor L 1 connected to the first port is removed.
  • the inductor L 1 and the capacitor C 1 connected in parallel to the first port have a center frequency ( Inductor (L 1 ) and capacitor (C 1 ) is the first LC circuit because it is shown to be open to the outside because it has a parallel resonance characteristic (i.e., because it has an infinite impedance at the resonance frequency) It may be configured to be removed (or omitted) at (400).
  • LC baluns By adding LC parallel resonant circuits between the first and second ports of the second LC circuit 500 and between the first and third ports, respectively, a new form having excellent phase and amplitude balance characteristics in a wide band can be obtained. LC baluns can be implemented.
  • FIG. 6 is a diagram illustrating a circuit structure of an LC balun according to an embodiment of the present invention.
  • the LC balun 600 is disposed between the first LC circuit part 610 disposed between the first port and the second port, and between the first port and the third port.
  • the second LC circuit unit 620 may be included.
  • the first LC circuit unit 610 A first LC concentrator 611 constructed using a ⁇ -type CLC concentrator 410 equivalent to the first transmission line 110 having an electrical length of 1, an inductor L a and a capacitor C a .
  • the first LC parallel resonant circuit 613 may be included.
  • the first LC concentrator 611 may be configured by removing the capacitor C 1 connected to the first port from the ⁇ -type CLC concentrator 410.
  • the inductor L 1 of the first LC concentrator 611 is connected in series with a line between the first port and the second port, and the capacitor C 1 of the first LC concentrator 611 is the first port. It can be connected in parallel to the line between the and the second port.
  • the inductor L 1 connected in series with the line between the first port and the second port may be composed of two bisected inductors L 1/2 .
  • the first LC parallel resonant circuit 613 may be connected between two bisected inductors L 1/2 .
  • the second LC circuit unit 620 A second LC concentrator 621 constructed using a ⁇ -type LCL concentrator 420 equivalent to a second transmission line 120 having an electrical length of 0, an inductor L a and a capacitor C a
  • a second LC parallel resonant circuit 623 may be included.
  • the second LC concentrator 621 may be configured by removing the inductor L 1 connected to the first port from the ⁇ -type LCL concentrator 420.
  • the capacitor C 1 of the second LC concentrator 621 is connected in series with a line between the first port and the third port, and the inductor L 1 of the second LC concentrator 623 is the first port. It can be connected in parallel to the line between and the third port.
  • the capacitor C 1 connected in series to the line between the first port and the third port may be composed of two bisected capacitors 2C 1 .
  • the second LC parallel resonant circuit 623 may be connected between two bisected capacitors 2C 1 .
  • the inductor L 1 and the capacitor C 1 constituting the first LC concentrator 611 and the second LC concentrator 621 are calculated by the above Equations 3 and 6 or the above Equations 9 and 12. Can be.
  • the inductor constituting the 623 to 2 LC parallel resonant circuit (L a) and a capacitor (C a) is the same element and the inductor constituting the first 613 to the LC parallel resonance circuit (L a) and a capacitor (C a) Has a value.
  • the device values L a / C a of the first and second LC parallel resonant circuits 621 and 623 may be calculated using the S parameters S 21 and S 31 of the LC balun 600.
  • the inductor L a constituting the first and second LC parallel resonant circuits 621 and 623 by calculating the S parameter of the LC balun 600 and applying the conditions that the ideal balun should have to the S parameter.
  • the value of the capacitor (C a) may be derived.
  • the first device and the value (L a / C a) of the second (621, 623) to the LC parallel resonance circuit to be described in detail the process of calculation.
  • the S parameter of the LC balun 600 first define the voltage (V) and current (I) at each port, and use the interrelationship between them to determine the ABCD parameters A 1 , B 1 , C 1 , D 1 ) can be derived.
  • the voltage and current at the first port and the second port are defined as V 1 , V 2 and I 1 , I 2 , respectively, and the [ABCD] matrix is used. Expressing the relationship between the voltage and the current, the following equation (13).
  • Equations 14 to 17 are as follows.
  • the third port of the LC balun 600 is terminated with Z 0 to ABCD parameters A T , B T , C T , D between the first port and the second port. T )
  • Equation 18 the ABCD parameters A T , B T , C T , D T between the first port and the second port can be expressed by Equation 18 below. May be represented by Equation 19 below.
  • a T , B T , C T , and D T of ABCD parameters are summarized using Equations 18 and 19, respectively, as shown in Equations 20 to 23 below.
  • Equation 24 The size of can be expressed by Equation 25 below.
  • Equation 26 In order to pass a signal whose size is equally divided in half in a wide frequency band based on the center frequency f 0 , the following Equation 26 must be satisfied. In other words, the ideal balun must have The slope of 0 is a condition.
  • Equation 26 element values L a / C a of the first and second LC parallel resonant circuits 621 and 623 may be calculated.
  • the LC balun according to the present invention A first LC concentrator composed of a ⁇ -type LC concentrator equivalent to a transmission line having an electrical length of A second LC concentrator constructed based on a ⁇ -type LC concentrator equivalent to a transmission line having an electrical length of 0, and LC resonant circuits added to each of the first and second LC concentrators, It can have very good phase and amplitude balance characteristics.
  • FIG. 8 is a pass signal between the balun of FIG. 1 and the balun of FIG. , ) Is a diagram comparing. As shown in Figure 8, of the existing balloon 100 and Is -3.54dB, -2.71dB at 3GHz and -3.54dB, -2.71dB at 4GHz, respectively, and the difference is about 0.83dB.
  • the bandwidth of the existing balun 100 has a bandwidth of 0.64 GHz from 3.18 GHz to 3.82 Ghz based on ⁇ 20 dB.
  • the bandwidth of the balloon 600 according to the present invention has a range of 2.83 GHz to 4.32 GHz based on -20 dB, the bandwidth of the balun 600 is about twice that of the existing balun.
  • FIG. 10 is a diagram comparing the phase difference between the balun of FIG. 1 and the balun of FIG. 6.
  • the conventional balun 100 exhibits a phase deviation of about 40.5 ° at a frequency bandwidth of 3 GHz to 4 GHz, while the balun 600 according to the present invention has a phase deviation of about 1.9 ° at the same frequency bandwidth. As it shows, it shows superior characteristics than the existing balun.
  • FIG. 11 is a diagram illustrating a circuit structure of an LC balun according to another embodiment of the present invention.
  • the LC balun 1100 may be disposed between the first LC circuit 1110 disposed between the first port and the second port, and between the first port and the third port.
  • the second LC circuit unit 1120 may be included.
  • the first LC circuit portion 1110 is And a ⁇ -type CLC concentrator 1111 equivalent to the first transmission line 110 having an electrical length of 1, and a first LC parallel resonant circuit 1113 including an inductor L a and a capacitor C a .
  • the first LC parallel resonant circuit 1113 may be connected between the inductors L 1/2 divided into two inductors L 1 .
  • the second LC parallel resonant circuit 1123 may be connected between the capacitors 2C 1 in which one capacitor C 1 is divided into two.
  • the inductor L 1 and the capacitor C 1 constituting the first LC concentrating element 1111 and the second LC concentrating element 1121 are calculated using Equations 3 and 6 or Equations 9 and 12 described above. Can be.
  • Device values L a / C a of the first and second LC parallel resonant circuits 1121 and 1123 may be calculated using S parameters S 21 and S 31 of the LC balun 1100.
  • the LC balun 1100 may have superior phase and amplitude balance characteristics than the existing balun 100 having two transmission lines.
  • FIG. 12 is a diagram illustrating an LC balun implemented through an LTCC structure.
  • the LC balun 1200 includes a first LC circuit portion disposed between the first port and the second port, and a second LC circuit portion disposed between the first port and the third port. can do.
  • the first LC circuit portion A first LC concentrator formed by using a ⁇ -type CLC concentrator equivalent to a first transmission line having an electrical length of 1, and a first LC parallel resonant circuit including an inductor (L a ) and a capacitor (C a ).
  • the first LC circuit part may be composed of three inductors and two capacitors.
  • the second LC circuit unit may be composed of two inductors and three capacitors.
  • the LC balun 1200 may be implemented using low temperature co-fired ceramic (LTCC) technology for miniaturization and high functionalization of components.
  • Low temperature co-fired ceramic (LTCC) technology is a process technology for forming a three-dimensionally arranged component by forming passive elements of a resistor (R), an inductor (L), and a capacitor (C) in a multilayer ceramic substrate.
  • LTCC low temperature co-fired ceramic
  • LTCC low-temperature co-fired ceramic
  • three inductors 1230 and L and five capacitors 1220 and C may be formed in the multilayer ceramic substrate 1210 to implement a three-dimensional LC balun 1200.
  • Passive elements 1220 and 1230 present in the multilayer ceramic substrate 1210 may be electrically connected through the plurality of via holes 1240.
  • the LC balun is implemented using a low temperature co-fired ceramic (LTCC) technology, but the present invention is not limited thereto. It will be apparent to those skilled in the art that the LC balun can be implemented by using a "" technology or a “Multiple Printed Circuit Board (PCB)” technology.
  • LTCC low temperature co-fired ceramic

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Abstract

L'invention concerne un symétriseur LC présentant d'excellentes caractéristiques d'équilibre de phase et d'amplitude dans une large bande. Le symétriseur LC comporte une première unité de circuit LC comprenant: une première constante localisée LC configurée d'après une constante localisée CLC de type pi équivalente à une première ligne de transmission ayant une première longueur électrique; et un premier circuit résonnant LC ajouté à la première constante localisée LC. Le symétriseur LC comporte une seconde unité de circuit LC comprenant: une second constante localisée LC configurée d'après une constante localisée LCL de type pi équivalente à une seconde ligne de transmission ayant une seconde longueur électrique; et un second circuit résonnant LC ajouté à la second constante localisée LC.
PCT/KR2019/004359 2018-05-10 2019-04-11 Symétriseur lc WO2019216559A1 (fr)

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Cited By (1)

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WO2023245497A1 (fr) * 2022-06-22 2023-12-28 上海捷士太通讯技术有限公司 Symétriseur lc à large bande

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CN111884621B (zh) * 2020-07-24 2021-10-08 北京新风航天装备有限公司 芯片级微型封装的带通滤波器及其封装方法
KR102660183B1 (ko) * 2021-08-24 2024-04-23 성균관대학교산학협력단 병렬연결 전송선로를 이용한 임피던스 변환 회로 및 하모닉 임피던스 튜너

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JP2002246946A (ja) * 2001-02-14 2002-08-30 Murata Mfg Co Ltd アンテナ共用器
KR20040075130A (ko) * 2003-02-20 2004-08-27 필코전자주식회사 저온동시소성(ｌｔｃｃ) 적층형 ｌｃ 필터
JP2005166702A (ja) * 2003-11-28 2005-06-23 Tdk Corp バラン
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JP2002246946A (ja) * 2001-02-14 2002-08-30 Murata Mfg Co Ltd アンテナ共用器
KR20040075130A (ko) * 2003-02-20 2004-08-27 필코전자주식회사 저온동시소성(ｌｔｃｃ) 적층형 ｌｃ 필터
JP2005166702A (ja) * 2003-11-28 2005-06-23 Tdk Corp バラン
KR100973006B1 (ko) * 2008-06-03 2010-07-30 삼성전기주식회사 발룬

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Title
SUNG, JEONG HYEON ET AL.: "Design Method of a Dual Band Balun", PROCEEDINGS OF THE KOREAN INSTITUTE OF ELECTROMAGNETIC AND SCIENCE CONFERENCE, vol. 11, no. 1, 1 November 2001 (2001-11-01), pages 165 - 168 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023245497A1 (fr) * 2022-06-22 2023-12-28 上海捷士太通讯技术有限公司 Symétriseur lc à large bande

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