CN116248064A - Unequal-phase double-circuit filter circuit and electronic device thereof - Google Patents

Unequal-phase double-circuit filter circuit and electronic device thereof Download PDF

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Publication number
CN116248064A
CN116248064A CN202211604745.XA CN202211604745A CN116248064A CN 116248064 A CN116248064 A CN 116248064A CN 202211604745 A CN202211604745 A CN 202211604745A CN 116248064 A CN116248064 A CN 116248064A
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inductance
capacitance
phase
capacitor
filter circuit
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周雨进
韦皓宇
周骏
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NANJING GUOBO ELECTRONICS CO Ltd
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NANJING GUOBO ELECTRONICS CO Ltd
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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
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0107—Non-linear filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • 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
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021—Constructional details

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Filters And Equalizers (AREA)

Abstract

The invention discloses an unequal phase double-circuit filter circuit and an electronic device thereof, wherein the unequal phase double-circuit filter circuit is used for simultaneously realizing a filter function and a conversion function between balanced signals and unbalanced signals and comprises a circuit metal layer, a microwave dielectric plate, a lower layer metal plate and a metallized through hole; the circuit metal layer is arranged on the upper surface of the microwave dielectric plate; the lower metal plate is arranged on the lower surface of the microwave dielectric plate and grounded; the metallized through holes vertically penetrate through the microwave dielectric plate and are connected with upper and lower layers of metal for realizing circuit grounding; the circuit metal layer comprises a Port1, a Port2, a Port3, a transmission Unit1, an isolation Unit2 and a phase shift Unit3.

Description

Unequal-phase double-circuit filter circuit and electronic device thereof
Technical Field
The invention belongs to the technical field of microwaves, and particularly relates to an unequal-phase double-circuit filter circuit and an electronic device thereof.
Background
With the rapid development of wireless communication technology, the demand for filters and balanced circuit elements is increasing. In the existing circuit system, the filter and the balance circuit element are usually cascaded together, and by adopting the simple cascading mode, a plurality of problems such as increased power loss, large circuit size and the like can be caused. Balun is a circuit that achieves a connection between a balanced transmission line circuit and an unbalanced transmission line circuit by converting a matched input into two differential outputs having the same amplitude and different phases. The band-pass filter is a device with signal frequency selection, plays a role in the front end of the microwave radio frequency, combines the two, can reduce the power loss caused by device mismatch, and can reduce the size of the device. With the increasing functionality of wireless communication systems, the systems now require the integration of more and more devices, which requires the size of each device to be reduced as much as possible. Because of the advantages of high process accuracy and ease of integration in a system of Integrated Passive Device (IPD) processes, devices designed based on this process are well suited for integration in wireless communication systems.
Disclosure of Invention
The invention aims at: the invention provides an unequal-phase double-path filter circuit which is used for simultaneously realizing a frequency selection function and a conversion function between balanced signals and unbalanced signals and has the characteristics of miniaturization and high isolation.
In order to achieve the above purpose, the present invention provides the following technical solutions: an unequal phase double-path filter circuit comprises a circuit metal layer, a microwave dielectric plate, a lower metal plate and a metalized through hole; the circuit metal layer is arranged on the upper surface of the microwave dielectric plate; the lower metal plate is arranged on the lower surface of the microwave dielectric plate and grounded; the metallized through holes vertically penetrate through the microwave dielectric plate and are connected with upper and lower layers of metal for realizing circuit grounding; the circuit metal layer comprises a Port1, a Port2, a Port3, a transmission Unit1, an isolation Unit2 and a phase shift Unit3;
the ports Port1, port2 and Port3 are made of metallized materials and are used for inputting or outputting signals; the Port1 is connected with a first end of the transmission Unit1, and the transmission Unit1 is used for realizing the filtering function and simultaneously realizing the mutual conversion between the single-ended signal and the differential signal; the second end of the transmission Unit1 is simultaneously connected with the Port2 and the first end of the isolation Unit 2; the isolation Unit2 is used for realizing that the first signal and the second signal are isolated and not interfered with each other; the third end of the transmission Unit1 is connected with the first end of the phase shifting Unit3, and the phase shifting Unit3 is used for changing the phase of the second signal but not changing the amplitude of the second signal; the second end of the phase shifting Unit3 is simultaneously connected with the second ends of the Port3 and the isolation Unit 2;
based on the structure of the unequal phase two-way filter circuit, the circuit has A, B working modes; a mode: the Port1 receives an input signal, and the input signal is filtered by the transmission Unit1 and then converted into a first output signal and a second output signal, wherein the first output signal is output by the Port 2; the second output signal is output by a Port3 after the phase of the second output signal is changed by a phase shifting Unit3; the isolation Unit2 is connected between the Port Port2 and the Port Port3, so that the first output signal and the second output signal are not interfered with each other; b mode: the Port Port2 and the Port Port3 receive two paths of input signals, the input signals received by the Port Port3 are input into the phase shifting Unit Unit3, the phase of the input signals is changed by the phase shifting Unit Unit3 and then are input into the transmission Unit Unit1, the input signals received by the Port Port2 are directly input into the transmission Unit Unit1, the two paths of input signals input into the transmission Unit Unit1 are filtered and then are combined into one path of output signal to be output from the Port Port1, and the isolation Unit Unit2 realizes that the two paths of input signals do not interfere with each other.
Further, the transmission Unit1 includes a capacitorC 1 CapacitanceC 2 CapacitanceC 3 InductanceL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL’ 1 One end is used as a first end of the transmission Unit1, and the inductorL’ 1 The other end is connected with the capacitor at the same timeC 1 One end, inductanceL’ 2 One end, capacitorC 3 One end;C 3 the other end is grounded; inductanceL’ 2 The other end is used as a second end of the transmission Unit 1; capacitance deviceC 1 The other end of (a) is connected with the capacitor at the same timeC 2 One end, inductanceL 2 One end, inductanceL 1 One end; inductanceL 1 The other end of the first electrode is grounded; inductanceL 2 The other end is used as a third end of the transmission Unit 1; the inductorL 1、 InductanceL’ 1 Configured such that there is inductive coupling therebetween; the saidInductanceL 2、 InductanceL’ 2 Configured such that there is inductive coupling between them.
Further, the transmission Unit1 further includes a ground pad1 and a ground pad2 formed of a metallized material, and the ground pad1 and the ground pad2 are connected to the lower metal plate through metallized through holes respectively; inductanceL 1 The capacitor C2 and the capacitor C3 are connected with the ground Pad1 and the ground Pad 2.
Further, the isolation Unit2 includes a capacitorC 4 CapacitanceC 5 CapacitanceC 6 InductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL’ 4 Resistance of resistorR 1 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL’ 3 One end is used as a first end of the isolation Unit2, and the inductorL’ 3 The other end is connected with a capacitorC 4 One end, inductanceL’ 4 One end, capacitorC 6 One end; capacitance deviceC 6 The other end of the first electrode is grounded; capacitance deviceC 4 The other end of (a) is connected with the capacitor at the same timeC 5 One end, inductanceL 3 One end, inductanceL 4 One end; capacitance deviceC 5 The other end of the first electrode is grounded; inductanceL 3 The other end is used as a second end of the isolation Unit 2; inductanceL 4 Another end and inductanceL’ 4 The other end is connected with the resistor in commonR 1 One end of the resistorR 1 The other end of the first electrode is grounded; the inductorL 3、 InductanceL’ 3 Configured such that there is inductive coupling therebetween; the inductorL 4、 InductanceL’ 4 Configured such that there is inductive coupling between them.
Further, by adjusting the aforementioned inductanceL 3 And inductorL’ 3 Length and spacing of (a) and inductanceL 4 And inductorL’ 4 Length and spacing, resistance of (a)R 1 Is of the size and capacitance of (a)C 4 CapacitanceC 5 CapacitanceC 6 Is of a size to achieve a pre-fit within the passbandThe required isolation effect is set.
Further, the isolation Unit2 further includes a grounding pad3 made of a metallized material, and the grounding pad3 is connected to the lower metal plate through a metallized through hole; capacitance deviceC 5 CapacitanceC 6 Resistance of resistorR 1 Is connected with the ground Pad 3.
Further, the phase shift Unit3 includes a capacitorC 7 CapacitanceC 8 CapacitanceC 9 InductanceL 5 InductanceL’ 5 InductanceL 6 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL 5 One end is used as a first end of the phase shifting Unit3, and the inductorL 5 The other end is connected with the capacitor at the same timeC 7 One end, capacitorC 8 One end, inductanceL 6 One end; capacitance deviceC 8 The other end of the first electrode is grounded; inductanceL 6 The other end of the first electrode is grounded; capacitance deviceC 7 The other end is connected with the capacitor at the same timeC 9 One end, inductanceL’ 5 One end; capacitance deviceC 9 The other end of the first electrode is grounded; inductanceL’ 5 The other end is used as a second end of the phase shifting Unit3; the inductorL 5 InductanceL’ 5 Configured such that there is inductive coupling between them.
Further, the phase shifting Unit3 adjusts the inductanceL 5 And inductorL’ 5 Length and spacing of (a) and inductanceL 6 Length of (d) and capacitanceC 7 CapacitanceC 8 CapacitanceC 9 The size of the first signal and the second signal meets the phase difference of the preset requirement.
Further, the phase shift Unit3 further includes a ground Pad4 made of a metallized material, and the ground Pad4 is connected to the lower metal plate through a metallized through hole; inductanceL 6 CapacitanceC 8 CapacitanceC 9 Is connected with the ground Pad 4.
Further, the aforementioned inductorL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 InductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL ’ 4 InductanceL 5 InductanceL’ 5 InductanceL 6 The projection of the transmission line on the plane of the lower metal plate is formed by combining straight lines and circular arcs.
Further, the resistor R1 is realized by a high-precision thin film resistor, and the capacitorC 1 CapacitanceC 2 CapacitanceC 3 CapacitanceC 4 CapacitanceC 5 CapacitanceC 6 CapacitanceC 7 CapacitanceC 8 CapacitanceC 9 Are formed by coupling two mutually opposite rectangular metallized electrodes.
Further, an electronic device comprises the non-uniform phase double-path filter circuit.
Compared with the prior art, the unequal phase two-way filter circuit has the following technical effects:
(1) The unequal-phase two-way filter circuit provided by the invention has good filter characteristics in a passband and excellent passband isolation, and can realize the conversion between balanced signals and unbalanced signals;
(2) The unequal phase double-circuit filter circuit provided by the invention has the size of only 0.12 lambdag multiplied by 0.15 lambdag (lambdag: waveguide wavelength of central frequency), and has the characteristics of small size, light weight, simple processing, easy integration and low manufacturing cost.
Drawings
FIG. 1 is a 45 view angle block diagram of an unequal phase dual-path filter circuit according to the present invention;
FIG. 2 is a schematic diagram of a hierarchical cross-section of an unequal phase dual-pass filter circuit according to the present invention;
FIG. 3 is a physical block diagram of the unequal phase dual-path filter circuit of the present invention;
FIG. 4 is an equivalent circuit diagram of the non-equal phase two-way filter circuit according to the present invention;
FIG. 5 is a graph of Port1 return loss and insertion loss performance of the non-equal phase dual-pass filter circuit of the present invention;
FIG. 6 is a graph showing the performance of Port2 and Port3 return loss and mutual isolation of the unequal phase dual-path filter circuit according to the present invention;
fig. 7 is a performance diagram of Port2 and Port3 phase differences of the unequal phase dual-path filter circuit according to the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are set forth below, along with the accompanying drawings.
Aspects of the invention are described herein with reference to the drawings, in which there are shown many illustrative embodiments. The embodiments of the present invention are not limited to the embodiments described in the drawings. It is to be understood that this invention is capable of being carried out by any of the various concepts and embodiments described above and as such described in detail below, since the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the disclosure may be used alone or in any suitable combination with other aspects of the disclosure.
The invention provides an unequal phase double-circuit filter circuit and an electronic device thereof, wherein the unequal phase double-circuit filter circuit is used for simultaneously realizing a frequency selection function and a conversion function between balanced signals and unbalanced signals and comprises a circuit metal layer, a microwave dielectric plate, a lower layer metal plate and a metallized through hole. As shown in fig. 1 and 2, the circuit metal layer is arranged on the upper surface of the microwave dielectric plate; the lower metal plate is arranged on the lower surface of the microwave dielectric plate and grounded; the metallized through holes vertically penetrate through the microwave dielectric plate and connect the grounding Pad in the circuit metal layer with the lower metal plate, so as to realize circuit grounding.
As shown in FIG. 3, the circuit metal layer comprises 3 ports Port1, port2, port3, ground Pad1, ground Pad2, ground Pad3, ground Pad4, and high-density plate capacitorC 1 CapacitanceC 2 CapacitanceC 3 CapacitanceC 4 CapacitanceC 5 CapacitanceC 6 CapacitanceC 7 CapacitanceC 8 CapacitanceC 9 The method comprises the steps of carrying out a first treatment on the surface of the High impedance transmission line implemented inductanceL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 InductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL’ 4 InductanceL 5 InductanceL’ 5 InductanceL 6 The method comprises the steps of carrying out a first treatment on the surface of the High-precision thin film resistorR 1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein the inductanceL 1 And inductorL’ 1 There is inductive coupling and inductance between themL 2 And inductorL’ 2 There is inductive coupling and inductance between themL 3 And inductorL’ 3 There is inductive coupling and inductance between themL 4 And inductorL’ 4 There is inductive coupling and inductance between themL 5 And inductorL’ 5 The inductive coupling exists between the two flat capacitors, the coupling coefficient of each group of coupling inductors can be adjusted by changing the length and the distance between the two coupling inductors, each flat capacitor is formed by coupling two rectangular metalized electrodes which are opposite to each other, and the capacitance value can also be adjusted by changing the size of the capacitor. The projection of the circuit on the plane of the lower metal plate is composed of straight lines and circular arcs.
As shown in the equivalent circuit diagram of fig. 4, the inductorL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 CapacitanceC 1 CapacitanceC 2 CapacitanceC 3 The ground Pad1 and the ground Pad2 form a transmission Unit1, and the transmission Unit is used for realizing the filtering function and simultaneously realizing the interconversion between the single-ended signal and the differential signal; inductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL’ 4 CapacitanceC 4 CapacitanceC 5 CapacitanceC 6 Resistance of resistorR 1 The grounding Pad3 forms an isolation Unit2 for realizing the mutual non-drying of the first signal and the second signalScrambling; inductanceL 5 InductanceL’ 5 InductanceL 6 The ground Pad4 constitutes a phase shifting Unit3 for changing the phase of the second signal but not the amplitude of the second signal.
Based on the structure of the unequal phase two-way filter circuit, the circuit has A, B two working modes: in the A mode, the Port Port1 receives the radio frequency signal, and after passing through the transmission Unit Unit1, the radio frequency signal is divided into a first signal and a second signal, wherein the first signal is output from the Port Port2, and the second signal is output from the Port Port3 after passing through the phase shift Unit Unit3. Since the phase shifting Unit3 has the effect of changing the phase of the signal but not the amplitude of the signal, the phase of the first signal output by Port2 and the phase of the second signal output by Port3 will differ by 180 °, but the amplitudes of the signals are substantially the same. In addition, the isolation Unit2 is used for isolating radio frequency signals between the Port2 and the Port3, so that signals of the two ports cannot interfere with each other; in the B mode, two paths of radio frequency signals with basically same amplitude are received by the Port Port2 and the Port Port3, the radio frequency signals received by the Port Port3 are input into the phase shifting Unit Unit3, the phase of the radio frequency signals is changed by the phase shifting Unit Unit3 and then are input into the transmission Unit Unit1, the radio frequency signals received by the Port Port2 are directly input into the transmission Unit Unit1, the two paths of radio frequency signals input into the transmission Unit Unit1 are filtered and then are combined into one path of output signal to be output from the Port Port1, and the isolation Unit Unit2 realizes that the two paths of signals of the Port Port2 and the Port Port3 are not interfered with each other.
In the simulation data in the A mode, FIG. 5 is a graph of Port1 return loss and insertion loss performance of the unequal phase dual-path filter circuit, as shown in the figure, the center frequency is 10GHz, and the 3-dB relative bandwidth is 10% (9.5 GHz-10.5 GHz); FIG. 6 is a graph of Port2, port3 return loss and mutual isolation performance of an unequal phase dual path filter circuit, as shown, with passband isolation better than 30dB; fig. 7 is a graph of Port2 and Port3 phase difference performance of the unequal phase dual-path filter circuit, where the two-path signal phase difference of Port2 and Port3 satisfies 180±5° as shown in the graph.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the invention is defined by the appended claims.

Claims (12)

1. An unequal phase two-way filter circuit is used for simultaneously realizing a frequency selection function and a conversion function between balanced signals and unbalanced signals; the microwave dielectric layer is characterized by comprising a circuit metal layer, a microwave dielectric plate, a lower metal plate and a metalized through hole; the circuit metal layer is arranged on the upper surface of the microwave dielectric plate; the lower metal plate is arranged on the lower surface of the microwave dielectric plate and grounded; the metallized through holes vertically penetrate through the microwave dielectric plate and are connected with upper and lower layers of metal for realizing circuit grounding; the circuit metal layer comprises a Port1, a Port2, a Port3, a transmission Unit1, an isolation Unit2 and a phase shift Unit3;
the ports Port1, port2 and Port3 are made of metallized materials and are used for inputting or outputting signals; the Port1 is connected with a first end of the transmission Unit1, and the transmission Unit1 is used for realizing the filtering function and simultaneously realizing the mutual conversion between the single-ended signal and the differential signal; the second end of the transmission Unit1 is simultaneously connected with the Port2 and the first end of the isolation Unit 2; the isolation Unit2 is used for realizing that the first signal and the second signal are isolated and not interfered with each other; the third end of the transmission Unit1 is connected with the first end of the phase shifting Unit3, and the phase shifting Unit3 is used for changing the phase of the second signal but not changing the amplitude of the second signal; the second end of the phase shifting Unit3 is simultaneously connected with the second ends of the Port3 and the isolation Unit 2;
based on the structure of the unequal phase two-way filter circuit, the circuit has A, B working modes;
a mode: the Port1 receives an input signal, and the input signal is filtered by the transmission Unit1 and then converted into a first output signal and a second output signal, wherein the first output signal is output by the Port 2; the second output signal is output by a Port3 after the phase of the second output signal is changed by a phase shifting Unit3; the isolation Unit2 is connected between the Port Port2 and the Port Port3, so that the first output signal and the second output signal are not interfered with each other;
b mode: the Port Port2 and the Port Port3 receive two paths of input signals, the input signals received by the Port Port3 are input into the phase shifting Unit Unit3, the phase of the input signals is changed by the phase shifting Unit Unit3 and then are input into the transmission Unit Unit1, the input signals received by the Port Port2 are directly input into the transmission Unit Unit1, the two paths of input signals input into the transmission Unit Unit1 are filtered and then are combined into one path of output signal to be output from the Port Port1, and the isolation Unit Unit2 realizes that the two paths of input signals do not interfere with each other.
2. The non-uniform phase two-way filter circuit according to claim 1, wherein said transmission Unit1 comprises a capacitorC 1 CapacitanceC 2 CapacitanceC 3 InductanceL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL’ 1 One end is used as a first end of the transmission Unit1, and the inductorL’ 1 The other end is connected with the capacitor at the same timeC 1 One end, inductanceL’ 2 One end, capacitorC 3 One end;C 3 the other end is grounded; inductanceL’ 2 The other end is used as a second end of the transmission Unit 1; capacitance deviceC 1 The other end of (a) is connected with the capacitor at the same timeC 2 One end, inductanceL 2 One end, inductanceL 1 One end; inductanceL 1 The other end of the first electrode is grounded; inductanceL 2 The other end is used as a third end of the transmission Unit 1; the inductorL 1、 InductanceL’ 1 Configured such that there is inductive coupling therebetween; the inductorL 2、 InductanceL’ 2 Configured such that there is inductive coupling between them.
3. The non-uniform phase two-way filter circuit according to claim 1, wherein said transmission Unit1 further comprises a ground pad1 and a ground pad2 made of a metallized material, said ground pad1 and said ground pad2 being connected by metallized vias, respectivelyA lower metal plate is connected; inductanceL 1 The capacitor C2 and the capacitor C3 are connected with the ground Pad1 and the ground Pad 2.
4. The non-uniform phase two-way filter circuit according to claim 1, wherein said isolation Unit2 comprises a capacitorC 4 CapacitanceC 5 CapacitanceC 6 InductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL’ 4 Resistance of resistorR 1 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL’ 3 One end is used as a first end of the isolation Unit2, and the inductorL’ 3 The other end is connected with a capacitorC 4 One end, inductanceL’ 4 One end, capacitorC 6 One end; capacitance deviceC 6 The other end of the first electrode is grounded; capacitance deviceC 4 The other end of (a) is connected with the capacitor at the same timeC 5 One end, inductanceL 3 One end, inductanceL 4 One end; capacitance deviceC 5 The other end of the first electrode is grounded; inductanceL 3 The other end is used as a second end of the isolation Unit 2; inductanceL 4 Another end and inductanceL’ 4 The other end is connected with the resistor in commonR 1 One end of the resistorR 1 The other end of the first electrode is grounded; the inductorL 3、 InductanceL’ 3 Configured such that there is inductive coupling therebetween; the inductorL 4、 InductanceL’ 4 Configured such that there is inductive coupling between them.
5. An unequal phase dual path filter circuit according to claim 4, wherein by adjusting the inductanceL 3 And inductorL’ 3 Length and spacing of (a) and inductanceL 4 And inductorL’ 4 Length and spacing, resistance of (a)R 1 Is of the size and capacitance of (a)C 4 CapacitanceC 5 CapacitanceC 6 The size of the antenna realizes the isolation effect meeting the preset requirement in the passband.
6. The unequal phase dual-pass filter circuit of claim 4, wherein the isolation Unit2 further comprises a ground pad3 made of a metallized material, the ground pad3 being connected to the lower metal plate through a metallized through hole; capacitance deviceC 5 CapacitanceC 6 Resistance of resistorR 1 Is connected with the ground Pad 3.
7. The unequal phase two-way filter circuit according to claim 1, wherein the phase shift Unit3 comprises a capacitorC 7 CapacitanceC 8 CapacitanceC 9 InductanceL 5 InductanceL’ 5 InductanceL 6 The method comprises the steps of carrying out a first treatment on the surface of the InductanceL 5 One end is used as a first end of the phase shifting Unit3, and the inductorL 5 The other end is connected with the capacitor at the same timeC 7 One end, capacitorC 8 One end, inductanceL 6 One end; capacitance deviceC 8 The other end of the first electrode is grounded; inductanceL 6 The other end of the first electrode is grounded; capacitance deviceC 7 The other end is connected with the capacitor at the same timeC 9 One end, inductanceL’ 5 One end; capacitance deviceC 9 The other end of the first electrode is grounded; inductanceL’ 5 The other end is used as a second end of the phase shifting Unit3; the inductorL 5 InductanceL’ 5 Configured such that there is inductive coupling between them.
8. The unequal phase dual path filter circuit of claim 7, wherein the phase shifting Unit3 is configured by adjusting the inductanceL 5 And inductorL’ 5 Length and spacing of (a) and inductanceL 6 Length of (d) and capacitanceC 7 CapacitanceC 8 CapacitanceC 9 The size of the first signal and the second signal meets the phase difference of the preset requirement.
9. An unequal phase dual according to claim 7The circuit filter circuit is characterized in that the phase shifting Unit3 further comprises a grounding Pad4 formed by a metallized material, and the grounding Pad4 is connected with a lower layer metal plate through a metallized through hole; inductanceL 6 CapacitanceC 8 CapacitanceC 9 Is connected with the ground Pad 4.
10. The unequal phase dual path filter circuit of any of claims 2-9 wherein the inductanceL 1 InductanceL’ 1 InductanceL 2 InductanceL’ 2 InductanceL 3 InductanceL’ 3 InductanceL 4 InductanceL’ 4 InductanceL 5 InductanceL’ 5 InductanceL 6 The projection of the transmission line on the plane of the lower metal plate is formed by combining straight lines and circular arcs.
11. The unequal phase two-way filter circuit according to any one of claims 2 to 9, wherein the resistor R1 is implemented by a high precision thin film resistor, the capacitorC 1 CapacitanceC 2 CapacitanceC 3 CapacitanceC 4 CapacitanceC 5 CapacitanceC 6 CapacitanceC 7 CapacitanceC 8 CapacitanceC 9 Are formed by coupling two mutually opposite rectangular metallized electrodes.
12. An electronic device, characterized in that: comprising the unequal-phase dual-pass filter circuit of any of claims 1-11.
CN202211604745.XA 2022-12-13 2022-12-13 Unequal-phase double-circuit filter circuit and electronic device thereof Pending CN116248064A (en)

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CN202211604745.XA CN116248064A (en) 2022-12-13 2022-12-13 Unequal-phase double-circuit filter circuit and electronic device thereof

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Application Number Priority Date Filing Date Title
CN202211604745.XA CN116248064A (en) 2022-12-13 2022-12-13 Unequal-phase double-circuit filter circuit and electronic device thereof

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CN116248064A true CN116248064A (en) 2023-06-09

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