WO2023106092A1 - Circuit haute fréquence - Google Patents

Circuit haute fréquence Download PDF

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Publication number
WO2023106092A1
WO2023106092A1 PCT/JP2022/043197 JP2022043197W WO2023106092A1 WO 2023106092 A1 WO2023106092 A1 WO 2023106092A1 JP 2022043197 W JP2022043197 W JP 2022043197W WO 2023106092 A1 WO2023106092 A1 WO 2023106092A1
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Prior art keywords
circuit
transmission line
switching
frequency
circuits
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PCT/JP2022/043197
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English (en)
Japanese (ja)
Inventor
正 前多
始 神藤
Original Assignee
学校法人 芝浦工業大学
株式会社村田製作所
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Application filed by 学校法人 芝浦工業大学, 株式会社村田製作所 filed Critical 学校法人 芝浦工業大学
Priority to JP2023566214A priority Critical patent/JPWO2023106092A1/ja
Publication of WO2023106092A1 publication Critical patent/WO2023106092A1/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
    • H01P1/10—Auxiliary devices for switching or interrupting
    • 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

Definitions

  • the present invention relates to high frequency circuits.
  • Patent Document 1 describes a line-switching phase shifter for switching circuits connected to transmission lines.
  • Non-Patent Document 1 describes a line-switching gyrator for switching circuits connected to transmission lines.
  • the transmission line ( ⁇ /4 line) becomes large.
  • the transmission line is configured by approximating it with a lumped constant circuit using inductors, capacitors, etc., the number of elements increases and the size of the transmission line increases.
  • an object of the present invention is to provide a high-frequency circuit capable of miniaturizing a transmission line.
  • a high-frequency circuit is connected to a plurality of first transmission lines and one end of each of the plurality of first transmission lines, and connects one end of each of the plurality of first transmission lines to the first circuit. and a second switching circuit connected to the other end of each of the plurality of first transmission lines and switching connection between the other end of each of the plurality of first transmission lines and the second circuit.
  • f m0 is the switching frequency of the first switching circuit and the second switching circuit
  • f is the frequency of the signal propagating in the first transmission line
  • ⁇ m0 is the wavelength for the switching frequency
  • m is an integer of 1 or more
  • the transmission line can be miniaturized.
  • FIG. 1 is a configuration diagram showing an example of a high frequency circuit according to an embodiment.
  • FIG. 2 is a configuration diagram showing another example of the high-frequency circuit according to the embodiment.
  • FIG. 3 is a configuration diagram showing another example of the high frequency circuit according to the embodiment.
  • FIG. 4 is a configuration diagram showing an example of a circulator to which the high frequency circuit according to the embodiment is applied.
  • FIG. 5 is a diagram for explaining the input impedance of a transmission line.
  • FIG. 6 is a diagram showing frequency characteristics of input impedance of a transmission line.
  • FIG. 7A is a diagram showing drive signals for the switching circuit at the first timing.
  • FIG. 7B is a diagram showing switching states of the switching circuit at the first timing.
  • FIG. 7A is a diagram showing drive signals for the switching circuit at the first timing.
  • FIG. 7B is a diagram showing switching states of the switching circuit at the first timing.
  • FIG. 8A is a diagram showing drive signals for the switching circuit at the second timing.
  • FIG. 8B is a diagram showing the switching state of the switching circuit at the second timing.
  • FIG. 9A is a diagram showing drive signals for the switching circuit at the third timing.
  • FIG. 9B is a diagram showing the switching state of the switching circuit at the third timing.
  • FIG. 10A is a diagram showing drive signals for the switching circuit at the fourth timing.
  • FIG. 10B is a diagram showing the switching state of the switching circuit at the fourth timing.
  • FIG. 11 is a configuration diagram showing an example of a ladder-type transmission line composed of an L-shaped circuit.
  • FIG. 12 is a diagram showing isolation characteristics of a circulator to which a ladder-type transmission line composed of an L-type circuit is applied.
  • FIG. 13 is a configuration diagram showing an example of a ladder-type transmission line composed of a ⁇ -Lattice circuit.
  • FIG. 14 is a Smith chart showing impedance characteristics of a ladder-type transmission line
  • FIG. 1 An embodiment will be described with reference to FIGS. 1 to 14.
  • FIG. 1 An embodiment will be described with reference to FIGS. 1 to 14.
  • FIG. 1 is a configuration diagram showing an example of a high frequency circuit 1 according to an embodiment.
  • the high-frequency circuit 1 is a circuit for switching paths for transmitting high-frequency signals (Radio Frequency (RF) signals), and includes a transmission line 10 and switching circuits 11 and 12 connected to both ends of the transmission line 10 .
  • RF Radio Frequency
  • the transmission line 10 is an example of a first transmission line.
  • the transmission line 10 may be composed of lumped constant elements (passive elements) using inductors, capacitors, and the like.
  • the transmission line 10 may be composed of a stripline system line in which a conductor is formed in a dielectric, such as a microstripline, a stripline, a coplanar guideline, or a coplanar guideline with GND.
  • the high-frequency circuit 1 only needs to have one or more transmission lines 10, and FIG. 1 shows an example in which a plurality of transmission lines 10 are provided.
  • the switching circuit 11 is an example of a first switching circuit.
  • the switching circuit 11 is connected to one end of the transmission line 10 and switches connection between the one end of the transmission line 10 and the first circuit 20 .
  • the first circuit 20 may be composed of the second transmission line, may be composed of passive elements, or may be composed of a delay circuit composed of passive elements.
  • the second transmission line is referred to as a "second" transmission line in order to distinguish it from the transmission line 10, which is an example of the first transmission line.
  • the switching circuit 12 is an example of a second switching circuit.
  • the switching circuit 12 is connected to the other end of the transmission line 10 and switches connection between the other end of the transmission line 10 and the second circuit 30 .
  • the second circuit 30 may be composed of a second transmission line, may be composed of passive elements, or may be composed of a delay circuit composed of passive elements.
  • the switching circuit 11 switches connection between one end of each of the plurality of transmission lines 10 and the plurality of first circuits 20, and the switching circuit 12 switches the other end of each of the plurality of transmission lines 10. and a plurality of second circuits 30 may be switched.
  • the high-frequency circuit 1 includes only one transmission line 10
  • the switching circuit 11 switches connection between one end of the transmission line 10 and the plurality of first circuits 20, and the switching circuit 12 switches the connection of the transmission line 10.
  • the connection between the other end and the plurality of second circuits 30 is switched.
  • the high-frequency circuit 1 includes a plurality of transmission lines 10
  • the switching circuit 11 connects one end of each of the plurality of transmission lines 10 and the first circuit.
  • the switching circuit 12 switches the connection between the second circuit 30 and the other end of each of the plurality of transmission lines 10 .
  • the switching circuits 11 and 12 may be composed of three-terminal semiconductor elements (semiconductor switches) whose conduction and non-conduction are controlled by control signals.
  • the switching circuits 11 and 12 may each be composed of a MOSFET (Metal Oxide Semiconductor Field Effect Transistor).
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • the switching circuits 11 and 12 may each be configured by a mechanical switch whose conduction and non-conduction are controlled by a control signal. Conduction and non-conduction of the switches in the switching circuits 11 and 12 are switched according to the switching frequency (frequency LO described later) of the switching circuits 11 and 12 .
  • one end of the transmission line 10 may be exclusively connected to one first circuit 20 out of the plurality of first circuits 20 by the switching circuit 11 .
  • one end of the transmission line 10 is connected to one of the plurality of first circuits 20. It may be connected to only one of the first circuits 20 and may not be connected to two or more first circuits 20 at the same time.
  • the other end of the transmission line 10 may be exclusively connected to one of the plurality of second circuits 30 by the switching circuit 12 .
  • the switching circuit 12 when the connection between the other end of the transmission line 10 and the plurality of second circuits 30 is sequentially switched by the switching circuit 12, the other end of the transmission line 10 is connected to the plurality of second circuits 30. Only one of the second circuits 30 may be connected, and two or more of the second circuits 30 may not be connected at the same time.
  • the first circuit 20 may be exclusively connected to one end of one of the plurality of transmission lines 10 by the switching circuit 11 . Specifically, when the connection between one end of the plurality of transmission lines 10 and the first circuit 20 is sequentially switched by the switching circuit 11, the first circuit 20 is connected to one of the plurality of transmission lines 10. It may be connected to only one transmission line 10 and may not be connected to two or more transmission lines 10 at the same time.
  • the second circuit 30 may be exclusively connected to the other end of one of the plurality of transmission lines 10 by the switching circuit 12. Specifically, when the connection between the other end of the plurality of transmission lines 10 and the second circuit 30 is sequentially switched by the switching circuit 12, the second circuit 30 is connected to any one of the plurality of transmission lines 10. Alternatively, it may be connected to only one transmission line 10 and may not be connected to two or more transmission lines 10 at the same time.
  • FIG. 2 and 3 are configuration diagrams showing another example of the high-frequency circuit 1 according to the embodiment.
  • a plurality of first circuits 20 and a plurality of second circuits 30 may be connected to one transmission line 10 by switching circuits 11 and 12 .
  • two first circuits 20 and two second circuits 30 are shown in FIG. It may be connected by switching circuits 11 and 12 .
  • one first circuit 20 and one second circuit 30 may be connected to a plurality of transmission lines 10 by switching circuits 11 and 12, as shown in FIG.
  • two transmission lines 10 are shown in FIG. 3
  • one first circuit 20 and one second circuit 30 may be connected to three or more transmission lines 10 by switching circuits 11 and 12. good.
  • ⁇ m0 is the wavelength for the switching frequencies of the switching circuits 11 and 12 and m is an integer of 1 or more, the length of the transmission line 10 is m ⁇ m0 /4.
  • Such a high-frequency circuit 1 can be applied to a gyrator that uses a mixer with switches, and the high-frequency circuit 1 that is a gyrator can be applied to a circulator.
  • a circulator to which the high-frequency circuit 1 is applied will be described below.
  • FIG. 4 is a configuration diagram showing an example of a circulator to which the high frequency circuit 1 according to the embodiment is applied.
  • the high-frequency circuit 1 is connected to transmission lines 10a and 10b and one ends of the transmission lines 10a and 10b, and a switching circuit 11 that switches connection between one ends of the transmission lines 10a and 10b and the first circuits 20a and 20b, and a transmission line.
  • a switching circuit 12 connected to the other ends of the transmission lines 10a and 10b and switching the connection between the other ends of the transmission lines 10a and 10b and the second circuits 30a and 30b.
  • the switching circuit 11 switches connection between one end of the transmission line 10a and the first circuits 20a and 20b, and switches connection between one end of the transmission line 10b and the first circuits 20a and 20b.
  • the switching circuit 12 switches connection between the other end of the transmission line 10a and the second circuits 30a and 30b, and switches connection between the other end of the transmission line 10b and the second circuits 30a and 30b.
  • the switching circuit 11 includes four switches whose conduction and non-conduction are controlled by a drive signal with a switching frequency LO.
  • One end of the transmission line 10a is connected to the first circuit 20a via a switch controlled by a drive signal LO1+ of frequency LO from a local oscillator.
  • One end of the transmission line 10a is connected to the first circuit 20b through a switch controlled by a driving signal LO1 ⁇ of frequency LO from a local oscillator.
  • One end of the transmission line 10b is connected to the first circuit 20a through a switch controlled by a driving signal LO1 ⁇ of frequency LO from a local oscillator.
  • One end of the transmission line 10b is connected to the first circuit 20b through a switch controlled by a driving signal LO1+ of frequency LO from a local oscillator.
  • the switching circuit 12 includes four switches whose conduction and non-conduction are controlled by a drive signal with a switching frequency LO.
  • the other end of the transmission line 10a is connected to the second circuit 30a via a switch controlled by a drive signal LO2+ of frequency LO from a local oscillator.
  • the other end of the transmission line 10a is connected to the second circuit 30b through a switch controlled by a drive signal LO2- of frequency LO from a local oscillator.
  • the other end of the transmission line 10b is connected to the second circuit 30a via a switch controlled by a drive signal LO2- of frequency LO from a local oscillator.
  • the other end of the transmission line 10b is connected to the second circuit 30b via a switch controlled by a drive signal LO2+ of frequency LO from the local oscillator.
  • the switching circuits 11 and 12 operate as Gilbert cell mixers, and the high frequency circuit 1 operates as a gyrator.
  • the high-frequency circuit 1 that operates as such a gyrator, the RF signal input to the transmission terminal 51 is transmitted to the antenna terminal 52 with low loss, and the RF signal input to the antenna terminal 52 is transmitted to the reception terminal 53 with low loss.
  • a circulator capable of transmitting with loss and increasing the isolation between the transmission terminal 51 and the reception terminal 53 can be realized.
  • the transmission terminal 51 and the antenna terminal 52 are connected via the third circuits 40a and 40b.
  • the third circuits 40a and 40b are, for example, transmission lines (second transmission lines).
  • the transmission terminal 51 and the high frequency circuit 1 are connected via the first circuits 20a and 20b.
  • the first circuits 20a and 20b are, for example, transmission lines (second transmission lines).
  • the antenna terminal 52, the receiving terminal 53 and the high frequency circuit 1 are connected via the second circuits 30a and 30b.
  • the second circuits 30a and 30b are, for example, transmission lines (second transmission lines).
  • the switching circuit 11 which is a Gilbert cell mixer connected to one end of the transmission lines 10a and 10b, is driven by the drive signal LO1+ of the frequency LO and the drive signal LO1- whose phase is inverted by 180°, thereby driving the first circuit.
  • the second circuits 30a and 30b, and the third circuits 40a and 40b ( ⁇ /4 lines)
  • the high-frequency circuit 1 which is a gyrator, is connected to the other ends of the transmission lines 10a and 10b by the drive signal LO2+ and the drive signal LO2- whose phase is delayed by 90° with respect to the drive signal LO1+ and the drive signal LO1-.
  • the frequency f BB is reconverted to frequency f RF by driving the switching circuit 12, which is a Gilbert cell mixer that is coupled to the circulator shown in FIG. and 90° phase lead and phase lag, respectively, to give a non-reciprocal relationship.
  • the high-frequency circuit 1 has S parameters of Equation 1 below.
  • the wavelength ⁇ m0 is the wavelength of the drive signals LO1+, LO1 ⁇ , LO2+ and LO2 ⁇
  • the wavelength ⁇ is the wavelength of the RF signal.
  • the high-frequency circuit 1 operates to switch two transmission lines 10a and 10b ( ⁇ m0 /4 line) at a frequency LO.
  • the transmission lines 10a and 10b ( ⁇ m0 /4 lines) become large.
  • the ⁇ m0 /4 line used in the high-frequency circuit 1 propagates a BB signal whose frequency is lower than that of the RF signal.
  • the BB signal will be 2/3 and 4/3 the frequency of the RF signal
  • the wavelength ⁇ m0 will be 3 times the wavelength of the RF signal. Therefore, the ⁇ m0 /4 line may become large.
  • FIG. 5 is a diagram for explaining the input impedance of the transmission lines 10a and 10b.
  • Zm0 is the characteristic impedance of the transmission lines 10a and 10b
  • ZL is the impedance of the transmission lines (first circuits 20a and 20b and second circuits 30a and 30b) connected to the transmission lines 10a and 10b
  • C 0 is the speed of light
  • f m0 is the switching frequency of the switching circuits 11 and 12
  • ⁇ m0 is the wavelength for f m0
  • f is the frequency of the signal propagating through the transmission lines 10a and 10b
  • ⁇ is the wavelength for f
  • ⁇ r is the transmission line 10a.
  • the transmission lines 10a and 10b are also referred to as the transmission line 10 when there is no need to distinguish between the transmission lines 10a and 10b.
  • first circuits 20a and 20b are also referred to as first circuit 20 when there is no need to distinguish between first circuits 20a and 20b.
  • second circuits 30a and 30b are also referred to as second circuit 30 when there is no need to distinguish between second circuits 30a and 30b.
  • the third circuits 40a and 40b are also referred to as the third circuit 40 when it is not necessary to distinguish between the third circuits 40a and 40b.
  • Equation 2 shows an analytical expression for the input impedance Z in of the transmission line 10 .
  • the frequency f RF of the RF signal is 900 MHz and the switching frequency LO (that is, frequency f m0 ) of the switching circuits 11 and 12 is 300 MHz
  • the frequency f BB (that is, frequency f) of the BB signal that propagates through the transmission line 10 is 600 MHz (900 MHz - 300 MHz) and 1200 MHz (900 MHz + 300 MHz)
  • the impedance can be matched and no reflection occurs.
  • the characteristic impedance Z m0 of the transmission line 10 greatly deviates from 50 ⁇ , the band narrows .
  • ZL is self-evident, and it can be seen that the impedance can be matched regardless of the relationship between the termination impedance ZL and the characteristic impedance Zm0 . That is, even if the transmission line 10 is a line or circuit with an arbitrary value of impedance, the impedance can be matched.
  • the principle of the present invention can be applied not only to unbalanced lines but also to differential lines. If differential lines are used, the present invention can also be applied to the high frequency circuit 1 (gyrator) using the Gilbert cell mixer shown in FIG. 4 and the circulator using it. By using this configuration for each transmission line in FIG. 4, these transmission lines can be miniaturized.
  • the switching frequency of the switching circuits 11 and 12 (drive signal frequency LO) is 300 MHz
  • the RF signal propagating through 30 and third circuit 40 is 900 MHz
  • the isolation between transmission terminal 51 and reception terminal 53 is maximized
  • the loss between transmission terminal 51 and antenna terminal 52 is minimized
  • the loss between the antenna terminal 52 and the receiving terminal 53 is minimized.
  • the frequency of the BB signal propagating through the transmission line 10 is down-converted from the frequency of the RF signal of 900 MHz to 600 MHz.
  • the RF signal is is 900 MHz
  • the impedance can be matched and the reflection loss in the high-frequency circuit 1 can be suppressed, so the characteristic impedance Zm0 of the transmission line 10 can be set to a value suitable for miniaturization.
  • switching circuits 11 and 12 are switched as shown in FIGS. 7A to 10B.
  • FIG. 7A is a diagram showing drive signals for the switching circuits 11 and 12 at the first timing.
  • FIG. 7B is a diagram showing switching states of the switching circuits 11 and 12 at the first timing.
  • FIG. 8A is a diagram showing drive signals for the switching circuits 11 and 12 at the second timing.
  • FIG. 8B is a diagram showing switching states of the switching circuits 11 and 12 at the second timing.
  • FIG. 9A is a diagram showing drive signals for the switching circuits 11 and 12 at the third timing.
  • FIG. 9B is a diagram showing switching states of the switching circuits 11 and 12 at the third timing.
  • FIG. 10A is a diagram showing drive signals for the switching circuits 11 and 12 at the fourth timing.
  • FIG. 10B is a diagram showing switching states of the switching circuits 11 and 12 at the fourth timing.
  • T the period of the driving signal with the switching frequency LO
  • T 1/LO
  • the first timing to the fourth timing are timings every T/4.
  • one end of the transmission line 10a is connected to the first circuit 20a, the other end of the transmission line 10a is connected to the second circuit 30b, and the transmission line 10b
  • One end of the transmission line 10b is connected to the first circuit 20b, and the other end of the transmission line 10b is connected to the second circuit 30a.
  • one end of the transmission line 10a is connected to the first circuit 20a
  • the other end of the transmission line 10a is connected to the second circuit 30a
  • the transmission line 10b is connected to the first circuit 20a, as shown in FIG. 8B.
  • One end of the transmission line 10b is connected to the first circuit 20b
  • the other end of the transmission line 10b is connected to the second circuit 30b.
  • one end of the transmission line 10a is connected to the first circuit 20b, the other end of the transmission line 10a is connected to the second circuit 30a, and the transmission line 10b One end of the transmission line 10b is connected to the first circuit 20a, and the other end of the transmission line 10b is connected to the second circuit 30b.
  • one end of the transmission line 10a is connected to the first circuit 20b, the other end of the transmission line 10a is connected to the second circuit 30b, and the transmission line 10b
  • One end of the transmission line 10b is connected to the first circuit 20a, and the other end of the transmission line 10b is connected to the second circuit 30a.
  • one end of the transmission line 10 is always connected to one of the first circuits 20a and 20b while being switched, and the other end of the transmission line 10 is connected to the first circuit. Only one of the two circuits 30a and 30b is always connected while being switched. Thereby, the high frequency circuit 1 can function as a gyrator.
  • the transmission line 10 may be composed of only passive elements by lumped constant approximation, or may be composed of, for example, a plurality of cascaded circuits.
  • the transmission line 10 may be configured by cascade-connecting circuits each including an inductor and a capacitor as passive elements.
  • the transmission line 10 may be composed of a ladder-type circuit in which L-type circuits are cascade-connected, a ladder-type circuit in which ⁇ -type circuits or ⁇ -lattice-type circuits are cascade-connected, for miniaturization.
  • FIG. 11 is a configuration diagram showing an example of a ladder-type transmission line 10 configured with an L-shaped circuit.
  • the transmission line 10 may be configured by a ladder-type circuit in which a plurality of L-type circuits composed of passive elements such as inductors and capacitors are cascaded.
  • FIG. 12 is a diagram showing isolation characteristics of a circulator to which the ladder-type transmission line 10 configured with an L-type circuit is applied.
  • FIG. 12 shows the isolation between the transmission terminal 51 and the reception terminal 53 when L-shaped circuits are cascaded in nine stages and when L-shaped circuits are cascaded in thirty stages.
  • the inductance value of the inductor can be 4.63 nH
  • the capacitance value of the capacitor can be 0.93 pF.
  • the inductance value of the inductor can be set to 1.39 nH
  • the capacitance value of the capacitor can be set to 0.28 pF.
  • the characteristic impedance of the transmission line 10 can be set to any value. good too.
  • the size of the inductors constituting the transmission line 10 can be reduced by setting the characteristic impedance (equivalent characteristic impedance) of the transmission line 10 to a small value. As a result, the transmission line 10 can be miniaturized.
  • FIG. 13 is a configuration diagram showing an example of a ladder-type transmission line 10 made up of a ⁇ -lattice circuit known for its flat frequency characteristic of delay time.
  • the transmission line 10 may be configured by a ladder type circuit in which a plurality of ⁇ -Lattice type circuits composed of passive elements such as inductors and capacitors are cascaded. For example, assume that five stages of ⁇ -Lattice type circuits are cascaded.
  • the delay time can be realized to the same extent as when 30 stages of L-shaped circuits are connected in cascade, and the configuration can be made smaller than the L-shaped circuit.
  • the inductance value of the inductor is as large as 8.3 nH.
  • FIG. 14 shows the reflection characteristics of the transmission line 10 at this time.
  • FIG. 14 is a Smith chart showing impedance characteristics of the ladder-type transmission line 10 configured by the ⁇ -lattice circuit.
  • the characteristic impedance of the transmission line 10 is that of the first circuit 20. It may be greater than the impedance and the impedance of the second circuit 30 .
  • the characteristic impedance of the transmission line 10 is shown in Formula 4 below. Note that h is the height of the dielectric forming the microstrip line, and W is the width (line width) of the conductor forming the microstrip line.
  • the transmission line 10 can be miniaturized because the line width can be reduced by increasing the characteristic impedance in the stripline system line.
  • the high-frequency circuit 1 includes the transmission line 10, the switching circuit 11 connected to one end of the transmission line 10, and switching connection between one end of the transmission line 10 and the plurality of first circuits 20, and the transmission line 10. and a switching circuit 12 connected to the other end of the transmission line 10 for switching connection between the other end of the transmission line 10 and the plurality of second circuits 30 .
  • fm0 is the switching frequency of the switching circuits 11 and 12
  • f is the frequency of the signal propagating on the transmission line 10
  • ⁇ m0 is the wavelength for the switching frequency
  • m is an integer of 1 or more
  • n is an integer of 0 or more.
  • f/f m0 2n/m when the length of the transmission line 10 is m ⁇ m0 /4.
  • the characteristic impedance of the transmission line 10 can be set to an arbitrary value. can do. That is, since the characteristic impedance of the transmission line 10 can be set to a value that reduces the size of the transmission line, the size of the transmission line 10 can be reduced. As a result, the entire circuit to which the high frequency circuit 1 is applied can be miniaturized.
  • one end of the transmission line 10 is exclusively connected to one first circuit 20 out of the plurality of first circuits 20 by the switching circuit 11 , and the other end of the transmission line 10 is connected to the plurality of first circuits by the switching circuit 12 . It may be exclusively connected to one second circuit 30 of the two circuits 30 .
  • One end of the transmission line 10 is exclusively connected to one first circuit 20 out of the plurality of first circuits 20, and the other end of the transmission line 10 is connected to one second circuit 30 out of the plurality of second circuits 30.
  • the high-frequency circuit 1 can be operated as a gyrator.
  • the high-frequency circuit 1 includes a plurality of transmission lines 10, a switching circuit 11 that is connected to one end of each of the plurality of transmission lines 10, and switches connection between one end of each of the plurality of transmission lines 10 and the first circuit 20; a switching circuit 12 connected to the other end of each of the transmission lines 10 and switching the connection between the other end of each of the plurality of transmission lines 10 and the second circuit 30 .
  • fm0 is the switching frequency of the switching circuits 11 and 12
  • f is the frequency of the signal propagating on the transmission line 10
  • ⁇ m0 is the wavelength for the switching frequency
  • m is an integer of 1 or more
  • n is an integer of 0 or more.
  • f/f m0 2n/m when the length of the transmission line 10 is m ⁇ m0 /4.
  • the characteristic impedance of the transmission line 10 can be set to an arbitrary value. can do. That is, since the characteristic impedance of the transmission line 10 can be set to a value that reduces the size of the transmission line, the size of the transmission line 10 can be reduced. As a result, the entire circuit to which the high frequency circuit 1 is applied can be miniaturized.
  • the first circuit 20 is exclusively connected to one end of one of the plurality of transmission lines 10 by the switching circuit 11
  • the second circuit 30 is connected to one end of the plurality of transmission lines 10 by the switching circuit 12. It may be connected exclusively to the other end of one of the transmission lines 10 .
  • the switching circuits 11 and 12 may each be composed of semiconductor elements whose conduction and non-conduction are controlled by control signals.
  • the high frequency circuit 1 can be applied to high frequency bands.
  • the switching frequencies of the switching circuits 11 and 12 may be different from the frequency of the signal propagating through the transmission line 10.
  • the high-frequency circuit 1 can be applied to a gyrator using a mixer using switches.
  • first circuit 20 and the second circuit 30 may each be configured by a second transmission line.
  • the high-frequency circuit 1 can be applied to a circuit composed of transmission lines.
  • the first circuit 20 and the second circuit 30 may each be composed of passive elements.
  • the high-frequency circuit 1 can be applied to a circuit composed of passive elements.
  • the first circuit 20 and the second circuit 30 may each be composed of a delay circuit composed of passive elements.
  • the high-frequency circuit 1 can be applied to a circuit composed of delay circuits.
  • the transmission line 10 may be composed of a plurality of cascaded circuits, and each of the circuits may be composed of passive elements.
  • the equivalent characteristic impedance of the transmission line 10 may be smaller than the impedance of the first circuit 20 and the impedance of the second circuit 30 .
  • the size of the inductors constituting the transmission line 10 can be reduced by setting the characteristic impedance (equivalent characteristic impedance) of the transmission line 10 to a small value. As a result, the transmission line 10 can be miniaturized.
  • the transmission line 10 may be configured by a stripline system line.
  • the characteristic impedance of transmission line 10 may be greater than the impedance of first circuit 20 and the impedance of second circuit 30 .
  • the characteristic impedance of the transmission line 10 can be set to a large value.
  • the line width of the stripline system can be narrowed, and as a result, the transmission line 10 can be miniaturized.
  • the present invention is not limited to the above embodiments. Another embodiment realized by combining arbitrary constituent elements in the above embodiment, and a modification obtained by applying various modifications that a person skilled in the art can think of without departing from the scope of the present invention to the above embodiment, the present invention also includes various devices incorporating the high-frequency circuit 1 according to the present invention.
  • the high-frequency circuit 1 of the present invention is not only a gyrator or a circulator using a gyrator, but also includes a selector circuit, a multiplexer circuit, a demultiplexer circuit, a serial-parallel conversion circuit, a parallel-serial conversion circuit, and other high-frequency systems in which paths are switched. can be applied to
  • the present invention can be widely used in high-frequency systems such as a gyrator, a circulator, a selector circuit, a multiplexer circuit, a demultiplexer circuit, a serial-parallel conversion circuit, or a parallel-serial conversion circuit as a high-frequency circuit that switches paths.
  • high-frequency systems such as a gyrator, a circulator, a selector circuit, a multiplexer circuit, a demultiplexer circuit, a serial-parallel conversion circuit, or a parallel-serial conversion circuit as a high-frequency circuit that switches paths.

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  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)

Abstract

L'invention concerne un circuit haute fréquence (1) qui comprend : une ligne de transmission (10); un premier circuit de commutation (11) qui est relié à une première extrémité de la ligne de transmission (10) et qui commute une connexion entre ladite première extrémité de la ligne de transmission (10) et une pluralité de premiers circuits (20); et un second circuit de commutation (12) qui est raccordé à l'autre extrémité de la ligne de transmission (10) et qui commute une connexion entre l'autre extrémité de la ligne de transmission (10) et une pluralité de seconds circuits (30). f/fm0 dans un cas où fm0 est la fréquence de commutation du premier circuit de commutation (11) et le second circuit de commutation (12), f est la fréquence d'un signal propagé sur la ligne de transmission (10), λm0 est une longueur d'onde par rapport à la fréquence de commutation, m est un nombre entier égal ou supérieur à 1, n est un nombre entier égal ou supérieur à 0, et la longueur de la ligne de transmission (10) est mλm0/4.
PCT/JP2022/043197 2021-12-10 2022-11-22 Circuit haute fréquence WO2023106092A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112713860A (zh) * 2020-12-10 2021-04-27 电子科技大学 一种基于cmos工艺的k波段集成环形器
JP2021527358A (ja) * 2018-06-11 2021-10-11 ザ・トラスティーズ・オブ・コロンビア・ユニバーシティ・イン・ザ・シティ・オブ・ニューヨーク 複数の相殺パスを含むサーキュレータ用の回路及び方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021527358A (ja) * 2018-06-11 2021-10-11 ザ・トラスティーズ・オブ・コロンビア・ユニバーシティ・イン・ザ・シティ・オブ・ニューヨーク 複数の相殺パスを含むサーキュレータ用の回路及び方法
CN112713860A (zh) * 2020-12-10 2021-04-27 电子科技大学 一种基于cmos工艺的k波段集成环形器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
AKIYA ORIKASA, CHISHIRO KUDO, TADASHI MAEDA: "C-12-9 Design of a CMOS differential gyrator circuit in switched transmission-line circulator", PROCEEDINGS OF THE 2022 IEICE GENERAL CONFERENCE (ELECTRONICS 2); MARCH 15TH-18TH, 2022, IEICE, JP, 18 March 2022 (2022-03-18) - 18 March 2022 (2022-03-18), JP, pages 47 - 47, XP009546541 *
NAGULU ARAVIND; ALU ANDREA; KRISHNASWAMY HARISH: "Fully-Integrated Non-Magnetic 180nm SOI Circulator with > 1W P1dB, >+50dBm IIP3 and High Isolation Across 1.85 VSWR", 2018 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM (RFIC), IEEE, 10 June 2018 (2018-06-10), pages 104 - 107, XP033383039, DOI: 10.1109/RFIC.2018.8428969 *

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