WO2012070698A1 - Dispositif de circuit non réciproque ayant un circuit de résonance et son procédé de fabrication - Google Patents

Dispositif de circuit non réciproque ayant un circuit de résonance et son procédé de fabrication Download PDF

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Publication number
WO2012070698A1
WO2012070698A1 PCT/KR2010/008332 KR2010008332W WO2012070698A1 WO 2012070698 A1 WO2012070698 A1 WO 2012070698A1 KR 2010008332 W KR2010008332 W KR 2010008332W WO 2012070698 A1 WO2012070698 A1 WO 2012070698A1
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WIPO (PCT)
Prior art keywords
plate
inductor
housing
garnet ferrite
pieces
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PCT/KR2010/008332
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English (en)
Korean (ko)
Inventor
김태원
이용신
이영기
Original Assignee
주식회사 파트론
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Publication of WO2012070698A1 publication Critical patent/WO2012070698A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/38—Circulators
    • H01P1/383—Junction circulators, e.g. Y-circulators
    • H01P1/387—Strip line circulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/36—Isolators

Definitions

  • the present invention relates to an irreversible circuit element, and more particularly, to a non-reversible circuit element, a non-reciprocal circuit having a resonant circuit capable of attenuating harmonic characteristics without increasing insertion loss by providing a resonant circuit composed of an inductor and a capacitor.
  • a device and a method of manufacturing the same are particularly, to a non-reversible circuit element, a non-reciprocal circuit having a resonant circuit capable of attenuating harmonic characteristics without increasing insertion loss by providing a resonant circuit composed of an inductor and a capacitor.
  • Isolator one of the irreversible circuit elements, is a passive circuit component with irreversible characteristics using the microwave diffraction phenomenon of ferrite. It is mainly used in mobile communication system to perform functions such as stable operation of power amplifier, impedance matching and echo cancellation. It is an element that plays an important role in stabilization of the system by performing.
  • Isolators are applied to mobile communication terminals and repeaters, and can be divided into a distributed element type device suitable for miniaturization and a distributed element type device applied to a high output system such as a base station.
  • Such isolators are classified into coaxial, drop-in, waveguide, and lumped elements according to their shapes.
  • Drop-In isolators are distributed-integer devices, typically implemented as a Stripline Y junction. Such a Y-junction drop-in isolator is advantageous for a high power system, has good characteristics such as insertion loss, isolation, and the like, and can be easily broadband.
  • FIG. 1 is a diagram illustrating a transmitting end of a general wireless communication device.
  • a transmitting end of a general wireless communication device includes a band pass filter 1, a power amplifier 2, an isolator 3, and an antenna 4 that pass a transmission band, and a band pass filter 1.
  • the frequency band of the predetermined signal is passed through, and the passed signal is amplified through the power amplifier 2 and then transmitted through the antenna 4.
  • the reverse signal when the reverse signal is input through the antenna 4 or the reflected wave of the transmitted signal is input, it may cause malfunction of the transmission equipment or damage of the power amplifier 2 or the like.
  • the isolator 3 is configured in the next stage of the power amplifier 2 to solve this problem, and performs the function of blocking the reflected wave of the reverse signal or the transmission signal received from the antenna 4.
  • FIG. 2 is a diagram illustrating a general circulator
  • FIG. 3 is a diagram illustrating a method of isolator operation by attaching a resistor to one side of a port of the circulator.
  • a signal input to port 1 is output to port 2, and a signal input to port 2 is output to port 3. .
  • the signal input to port 3 is output to port 1 to perform a cyclic circulator operation.
  • the isolator shown in FIG. 3 is a diagram showing a terminal resistor R attached to an arbitrary port of the circulator to operate the isolator. As an arbitrary port, a terminal resistor R is attached to one side of port 3, and the signal input to the port 2 is removed by the terminal resistor R. As shown in FIG. 3
  • the isolator using the circulator has directivity by using the irreversibility of the permanent magnet and ferrite (ferromagnetic material), and facilitates the frequency shift control.
  • Figure 4 is an exploded perspective view for explaining the irreversible circuit element according to the prior art.
  • the irreversible circuit device 200 is composed of several devices stacked and mounted on the housing 110 to implement a transmission and carrier circuit of a normally transmitted transmission wave and a reverse wave reflected wave thereof, which are input and output in a wireless communication system. It is.
  • the housing 110 serves as an outer case of the magnetic shielding and internal components, and has a cylindrical shape having an upper receiving opening 111 having three terminal through grooves 110a, 110b, and 110c on the side. Is formed.
  • the receiving groove 111 of the housing 110 has a lower magnet 100, a lower pole piece 90, a lower garnet ferrite 80, a center conductor 70, and upper parts as internal components.
  • the garnet ferrite 60, the upper pole plate 50, the upper magnet 40, the temperature compensating plate 30, the top plate 20, and the cover 10 are sequentially stacked.
  • the lower magnet 100 and the upper magnet 40 apply a DC magnetic field to the lower garnet ferrite 80 and the upper garnet ferrite 60.
  • Each of the lower electrode plate 90 and the upper electrode plate 50 accumulates the magnetic force of the lower magnet 100 and the upper magnet 40 to uniformly apply magnetic force to the lower garnet ferrite 80 and the upper garnet ferrite 60. Distribution and serves as a ground plane.
  • the lower garnet ferrite 80 and the upper garnet ferrite 60 are ferrites or ferrites in which dielectrics are coupled to each other, and the center conductor 70 and the upper and lower garnet ferrites 60 and 80 are interposed therebetween.
  • Inductance L value and capacitance C value are implemented to irreversible phenomenon in band of desired frequency.
  • the center conductor 70 provides a function of a transmission conductor that enables signal transmission.
  • the L and C values are implemented according to the phenomenon of the line of the center conductor 70 to cause resonance in a frequency band desired by the developer. Play a role.
  • the center conductor 70 includes three ports 1 (70a), two ports (70b), and three ports (70c) input and output ports, and each of these terminals passes through a terminal section cut in three directions of the housing 110. It protrudes out of the housing 110 through the grooves 110a, 110b and 110c.
  • the thermal sheet metal 30 is a magnetic field parallel temperature compensating plate for compensating for the characteristic that the intensity of the magnetic field transmitted to the upper and lower garnet ferrites 60 and 80 by the magnet changes with temperature. .
  • the top plate 20 includes a plurality of protruding pieces 20a, 20b, and 20c protruding outward from the outer circumferential surface thereof so that the alignment of the plurality of internal components formed in the accommodation groove 111 of the housing 110 is distorted. prevent.
  • the cover 10 protects the durable components configured in the receiving groove 111 of the housing 110.
  • FIG. 5 is a cross-sectional structural view of a Y-junction drop-in type circulator of a non-reciprocal circuit element according to the prior art
  • FIG. 6 is a magnet used for the Y-junction drop-in circulator of the irreversible circuit element shown in FIG. 5.
  • FIG. 7 is a ground configuration cross-sectional structure diagram in which the magnet used for the Y-junction drop-in circulator of the irreversible circuit element shown in FIG. 5 is non-conductive
  • FIG. It is a graph for explaining the harmonic characteristics of the irreversible circuit device according to.
  • FIG. 5 The schematic cross-sectional structure of the Y-junction drop-in type circulator of the non-reciprocal circuit element according to the prior art is shown in FIG. 5, the lower magnet 100, the lower electrode plate () in the receiving groove 111 inside the housing 110.
  • a pole piece 90, a lower garnet ferrite 80, a center conductor 70, an upper garnet ferrite 60, an upper pole plate 50 and an upper magnet 40 are sequentially stacked.
  • the temperature compensation plate 30, the top plate 20, and the cover 10 are omitted for convenience of description.
  • the drop-in type shown in FIG. 5 has a stripline structure in which upper and lower pole plates 50 and 90 and upper and lower magnets 40 and 100 are electrically connected to ground. do. To this end, the upper and lower pole plates 50 and 90 are electrically connected to the housing 110.
  • the upper and lower magnets 40 and 100 since no separate surface treatment for grounding is necessary, the upper and lower magnets 40 (see FIG. 6) ( The upper and lower electrode plates 50 and 90 respectively contacted with 100 are in direct contact with the housing 110.
  • a magnet for example, SmCo-based
  • the upper and lower magnets 40 and 100 in order to electrically connect with the housing 110, the upper and lower magnets as shown in FIG.
  • the plating films 120 and 130 are formed on the surfaces 40 and 100.
  • the drop-in isolator has a higher power consumption than the lumped constant type, and the allowable power range tends to be high to suit the high output of the system. Accordingly, sufficient consideration should be given to the problem of dissipation of heat generated at high power, and the higher the output power, the more harmonic and intermodulation effects of the non-linear characteristics of the garnet ferrites 60 and 80 are produced. We must find ways to minimize this.
  • FIG. 8 is a graph illustrating the harmonic characteristics of the non-reciprocal circuit device according to the related art
  • the second harmonic frequency has attenuation characteristics at 4220 to 4340 MHz.
  • the 3rd harmonic frequency is around 27dB, and the 3rd harmonic attenuation characteristic is about 25dB at 6330 ⁇ 6510MHz.
  • a signal having a frequency component passes through a device, a circuit, or a system to generate an energy source corresponding to the multiple thereof.
  • the multiple frequency component of this particular frequency is generally called Harmonic.
  • harmonic control is essential for improving the efficiency and linearity of amplifiers, and it can be seen that the control of harmonic characteristics is very difficult in the third harmonic, especially in the irreversible circuit device using ferrites such as isolators and circulators according to the prior art. have.
  • the low pass filter LPF
  • the insertion loss of the low pass filter is added to worsen the loss characteristics of the irreversible device.
  • the Y-junction circulator which is a distribution element, forms a resonator having an arbitrary shape by the center conductor and garnet ferrite, also referred to as junction, which is a special method for controlling harmonic characteristics in circulator design.
  • junction which is a special method for controlling harmonic characteristics in circulator design.
  • the present invention is to solve all the disadvantages and problems of the prior art as described above, the present invention comprises a resonant circuit composed of an inductor and a capacitor in the construction of a non-reciprocal circuit element to attenuate harmonic characteristics without increasing insertion loss
  • An object of the present invention is to provide an irreversible circuit element having a resonant circuit which can be used, and a manufacturing method thereof.
  • the irreversible circuit device including the resonant circuit of the present invention for achieving the above object is a non-reciprocal circuit device including a resonator component, having a cylindrical shape having an upper receiving opening groove having a plurality of terminal passage grooves.
  • a formed metal housing A capacitor plate seated on a bottom surface of the receiving groove of the housing; An inductor plate seated on an upper surface of the capacitor plate and in contact with an inner circumferential surface of the housing, and arranged in alignment with the resonator component of the irreversible circuit element, the inductor plate constituting the capacitor plate and the resonant circuit; A resonator component stacked on the upper surface of the inductor plate and received; And a cover coupled to the housing on the upper surface of the resonator component.
  • the manufacturing method of the irreversible circuit element provided with the resonant circuit of this invention for achieving the said objective is the manufacturing method of the irreversible circuit element comprised with the resonator component, Comprising: The upper part which has a some terminal pass groove is opened.
  • a metal housing formed into a cylindrical shape having a receiving groove; Mounting a capacitor plate on a bottom surface of the receiving groove of the housing; Mounting an inductor plate on an upper surface of the capacitor plate so as to constitute a capacitor plate and a resonant circuit comprising a plurality of inductor pieces contacting the inner circumferential surface of the housing and a plurality of alignment pieces for aligning the resonator components of the irreversible circuit element; Stacking a resonator component on top of the inductor plate; And coupling a cover to protect a component in the receiving groove of the housing on the upper surface of the resonator component.
  • FIG. 1 is a view showing a transmitting end of a general wireless communication equipment
  • FIG. 3 is a diagram of implementing an isolator by attaching a resistance to one side of a port of the circulator
  • FIG. 5 is a cross-sectional structure diagram of a Y-junction drop-in type circulator of a non-reciprocal circuit element according to the prior art
  • FIG. 6 is a cross-sectional structure diagram of the ground configuration when the magnet used in the Y-junction drop-in circulator of the irreversible circuit element shown in FIG. 5 is conductive;
  • FIG. 7 is a cross-sectional structure diagram of the ground configuration when the magnet used in the Y-junction drop-in circulator of the irreversible circuit element shown in FIG. 5 is non-conductive;
  • FIG. 9 is an exploded perspective view illustrating an irreversible circuit device having a resonant circuit according to the present invention.
  • FIG. 10 is a detailed view of an inductor plate of the irreversible circuit element with the resonant circuit shown in FIG. 9;
  • 11 and 12 are views for explaining a Y-junction drop-in type circulator of an irreversible circuit element having a resonant circuit according to the present invention
  • FIG. 13 and 14 are views illustrating an inductor plate on which an inductor circuit of an irreversible circuit element having a resonant circuit according to the present invention is formed;
  • 16 is a flowchart for explaining a method for manufacturing an irreversible circuit element having a resonant circuit according to the present invention.
  • FIG. 9 is an exploded perspective view illustrating the irreversible circuit device according to the present invention.
  • the non-reciprocal circuit device 500 serves as an outer case of the magnetic shield and the internal components, and has three terminal through grooves 110a, 110b, and 110c on the side.
  • a metal housing 410 formed in a cylindrical shape having an upper receiving opening 111, a capacitor plate 400 seated on a ground surface of a bottom surface of the receiving groove 411 of the housing 410, and a capacitor plate 400.
  • An inductor plate (390) formed with a plurality of inductor pieces (392) arranged on the upper surface and in contact with the inner circumferential surface of the housing (410) and a plurality of alignment pieces (391) for aligning the resonator components of the irreversible circuit element, and the inductor plate (
  • On the top plate 320 and the top surface of the top plate 320 It consists of a cover 310 combined with the housing 410.
  • the upper magnet 340 applies a DC magnetic field to the lower garnet ferrite 380 and the upper garnet ferrite 360.
  • the upper electrode plate 350 accumulates the magnetic force of the upper magnet 340 to uniformly distribute the magnetic force in the lower garnet ferrite 380 and the upper garnet ferrite 360 and provide a ground plate.
  • the lower garnet ferrite 380 and the upper garnet ferrite 360 are ferrites or ferrites in which dielectrics are coupled to each other, and the inductance L value and the capacitor C value are implemented with the center conductor 370 interposed therebetween. Enables reversible and irreversible transmission of radio waves.
  • the center conductor 370 provides a function of a signal source, that is, a transmission conductor that enables transmission of a transmission wave and a carrier wave.
  • the center conductor 370 has an input terminal 370a to which an input signal is applied and a signal is output.
  • An output terminal 370b and a ground terminal 370c for removing a carrier wave are provided.
  • the terminals of each of the center conductors 370 protrude out of the housing 410 through the terminal through grooves 410a, 410b, and 410c cut in three directions of the housing 410.
  • the thermal sheet metal 330 is a magnetic field parallel temperature compensating plate for compensating for the characteristic of changing the intensity of the magnetic field transmitted to the upper and lower garnet ferrites by the magnet according to the temperature change, and the center conductor 370. And cools heat generated in the housing 310 while forming a gyro to implement electrical characteristic values between the upper garnet ferrite 360 and the lower garnet ferrite 380 of the upper and lower center conductors 370. It performs heat dissipation.
  • the top plate 320 includes a plurality of protruding pieces 320a, 320b, 320c protruding outward from the outer circumferential surface of the top plate 320, and a plurality of internal components configured in the receiving groove 411 of the housing 410. Prevents device misalignment.
  • the cover 310 protects the durable components configured in the receiving groove 411 of the housing 410.
  • FIG. 10 is a detailed view of an inductor plate of the irreversible circuit element shown in FIG. 9.
  • the inductor plate 390 of the irreversible circuit device includes a plurality of inductor pieces 392 extending outward from the outer circumferential surface of the inductor plate 390 so as to contact the inner circumferential surface of the housing 410.
  • the plurality of alignment pieces 391a, 391b and 391c are formed vertically in the cover 310 direction on the outer circumferential surface of the inductor plate 390.
  • the thickness of the inductor plate 390, the number of alignment pieces 391a, 391b, 391c, and the number of inductor pieces 392 may be configured according to experiments or field experiences. In the state in which the inductor piece 392 is not provided and is not electrically grounded, a resonance circuit is formed only by the capacitor plate, thereby controlling the characteristics of harmonics.
  • 11 and 12 are views for explaining the Y-junction drop-in type circulator of the irreversible circuit element according to the present invention.
  • the Y-junction drop-in type circulator of the non-reciprocal circuit device has a capacitor plate 400, an inductor plate 390, and a lower garnet ferrite in a receiving groove in the housing 410.
  • a garnet ferrite 380, a center conductor 370, an upper garnet ferrite 360, an upper electrode plate 350, and an upper magnet 340 are sequentially stacked.
  • the temperature compensation plate 330, the top plate 320 and the cover 310 are omitted for convenience of description.
  • the capacitor plate 400 and the inductor plate 390 constitute one parallel resonant circuit.
  • the inductor plate 390 and the capacitor plate 400 are used as the inductor circuit 393 and the capacitor circuit 401 as shown in FIG.
  • FIG 13 and 14 are views for explaining an inductor plate formed with an inductor circuit of the irreversible circuit device according to the present invention.
  • the inductor plate in which the inductor circuit of the irreversible circuit element according to the present invention is formed is a ground (GND) contacted with a plurality of inductors 392 extending outward from the outer circumferential surface of the inductor plate 390 in contact with the inner circumferential surface of the circular housing 410. It is shown.
  • GND ground
  • connection portion between the inductor plate 390 and the inner circumferential surface of the housing 410 used as the ground may be equivalently formed as an inductor, and the dielectric plate 400 located at the bottom of the inductor plate 390 may be used.
  • the dielectric plate 400 located at the bottom of the inductor plate 390 may be used.
  • This LC resonant circuit does not affect the main band characteristics of the circulator's primary frequency, but acts as an attenuation circuit and a band stop filter in a frequency band of 2 to 3 times to adjust the resonant frequency of the band stop. This makes it possible to control the attenuation of the harmonic characteristics of the desired frequency band. In addition, harmonics can be effectively attenuated without an increase in insertion loss due to harmonic attenuation.
  • 15 is a graph for explaining harmonic characteristics of the irreversible circuit device according to the present invention.
  • the second harmonic frequency is about 25 dB to 27 dB attenuation at 4220 to 4340 MHz.
  • the attenuation characteristic is around 32dB to 40dB at 6330 ⁇ 6510MHz, and it can be seen that an effect of about 7dB to 15dB (25 to 32%) is improved compared to the conventional art.
  • 16 is a flowchart for explaining a method for manufacturing an irreversible circuit element having a resonant circuit according to the present invention.
  • a metal housing 410 formed in a cylindrical shape having a receiving groove 411 having an open upper portion having a plurality of terminal through grooves 410a, 410b, and 410c.
  • a housing 410 may be configured not only in the cylindrical shape but also in a rectangular parallelepiped shape and the like, and the shape thereof is not particularly limited.
  • the capacitor plate 400 is seated on the bottom of the receiving groove 411 of the housing 410 (S20).
  • a plurality of inductor pieces 392 contacting the inner circumferential surface of the housing 410 and a plurality of alignment pieces 391 for aligning the resonator components of the irreversible circuit element are used to connect the capacitor plate 400 and the resonant circuit.
  • the inductor plate 390 is seated on the upper surface of the capacitor plate 400 (S30).
  • the plurality of inductor pieces 392 of the inductor plate 390 extend from the outer circumferential surface of the inductor plate 390 to contact the inner circumferential surface of the housing 410, and the plurality of alignment pieces 391 of the inductor plate 390 are formed. Is formed perpendicular to the cover 310 in the outer peripheral surface of the inductor plate 390.
  • a resonator component is stacked on the inductor plate 390 (S40).
  • the resonator component is stacked by sequentially stacking a lower garnet ferrite 380, a center conductor 370, and an upper garnet ferrite 360 on the upper surface of the inductor plate 390.
  • the upper electrode plate 350 and the lower garnet ferrite 380 which accumulate magnetic force on the upper garnet ferrite 360 to smoothly transfer the magnetic force to the lower garnet ferrite 380 and the upper garnet ferrite 360.
  • the upper magnet 340 for applying a DC magnetic field to the upper garnet ferrite 360 are sequentially stacked.
  • a temperature compensation plate serving as a magnetic field parallel temperature compensating circuit for compensating for the characteristic of changing the intensity of the magnetic field transmitted to the upper and lower garnet ferrites 360 and 380 according to the temperature change on the upper magnet 340 ( 330 is stacked.
  • the upper electrode plate 350, the upper magnet 340 and the temperature compensating plate 330 which is a resonator component of the housing 410, having a plurality of protrusion pieces 320a, 320b, 320c protruding outward from the outer circumferential surface
  • the top plate 320 to prevent the alignment of the is laminated.
  • the inductor plate 390 constituting the resonant circuit with the capacitor plate 400 performs attenuation for at least one harmonic frequency of the second harmonic frequency or the third harmonic frequency of the main band of the irreversible circuit element having the resonant circuit. do.
  • the plurality of alignment pieces of the inductor plate is configured as three, and the number of inductor pieces is 12, but the number of alignment pieces and the inductor pieces is not limited thereto.
  • the inductor plate and the dielectric plate may be located in the lower part of the resonator as described and illustrated, and may be applied to both the upper and lower parts of the resonator in a high value inductance and capacitance or the like. can do.
  • the present invention can be applied to all transmission line structures such as microstrip, CPW, coaxial, as well as to the combined line such as edge coupled line and broadside coupled line as well as stripline structure.
  • the present invention is applicable not only to drop-in circulators / isolators, but also to all elements including at least one ground such as active elements as well as passive elements such as filters, couplers, combiners, and switches.

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  • Non-Reversible Transmitting Devices (AREA)

Abstract

La présente invention porte sur un dispositif de circuit non réciproque ayant un circuit de résonance et sur son procédé de fabrication. Un circuit de résonance ayant des inductances et des condensateurs est compris de telle sorte que des caractéristiques harmoniques peuvent être atténuées sans augmenter la perte d'insertion. L'invention comprend : un boîtier métallique en forme de cylindre qui a une pluralité de rainures de passage de terminaux, et une rainure de réception ayant une partie supérieure ouverte ; une plaque de condensateur qui est placée sur un côté inférieur de la rainure de réception du boîtier ; une plaque d'inductance qui est placée sur un côté supérieur de la plaque de condensateur, et constitue un circuit de résonance conjointement avec la plaque de condensateur, une pluralité de parties d'inductance, qui viennent en contact avec une surface interne du boîtier, et une pluralité de parties en réseau pour mettre en réseau les composants de résonateur d'un dispositif de circuit non réciproque étant formées sur celle-ci ; les composants de résonateur qui sont empilés et reçus sur le côté supérieur de la plaque d'inductance séquentiellement ; et un élément de recouvrement qui est couplé au boîtier sur le côté supérieur des composants de résonateur.
PCT/KR2010/008332 2010-11-23 2010-11-24 Dispositif de circuit non réciproque ayant un circuit de résonance et son procédé de fabrication WO2012070698A1 (fr)

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KR10-2010-0116772 2010-11-23
KR1020100116772A KR101007544B1 (ko) 2010-11-23 2010-11-23 공진회로를 구비한 비가역 회로소자 및 그의 제조 방법

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CN111129676A (zh) * 2020-01-14 2020-05-08 中国电子科技集团公司第九研究所 一种提高环行器谐波抑制性能的方法及环行器

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US9214712B2 (en) 2011-05-06 2015-12-15 Skyworks Solutions, Inc. Apparatus and methods related to ferrite based circulators
US9711835B2 (en) 2012-05-18 2017-07-18 Skyworks Solutions, Inc. Apparatus and methods related to junction ferrite devices having improved insertion loss performance
KR101620681B1 (ko) 2014-03-26 2016-05-12 주식회사 나노웨이브 커버 하부에 파워디텍터를 내장한 아이솔레이터
KR101611034B1 (ko) 2014-05-01 2016-04-20 주식회사 나노웨이브 페러데이 공진기 상부에 파워디텍터를 내장한 아이솔레이터
US10333192B2 (en) * 2016-05-20 2019-06-25 Smiths Interconnect, Inc. Below resonance circulator and method of manufacturing the same
WO2019118870A1 (fr) * 2017-12-14 2019-06-20 Trak Microwave Corporation Circulateur à large bande et son procédé de fabrication
KR102029992B1 (ko) * 2018-05-21 2019-10-08 세인플렉스 주식회사 비가역 회로소자
KR102082882B1 (ko) * 2018-07-03 2020-02-28 (주)에드모텍 고전력 광대역 서큘레이터
KR20210050276A (ko) * 2019-10-28 2021-05-07 (주)파트론 공진 회로를 구비한 비가역 소자
KR102307551B1 (ko) * 2019-11-05 2021-09-30 (주)파트론 공진 회로를 구비한 비가역 소자

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