CN111294015A - Frequency-adjustable single-pole multi-throw filter switch, switch circuit and circuit control method - Google Patents
Frequency-adjustable single-pole multi-throw filter switch, switch circuit and circuit control method Download PDFInfo
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Abstract
The invention discloses a frequency-adjustable single-pole multi-throw filter switch, which comprises N + 1A-type resonators and 1B-type resonator which are formed on a dielectric substrate, wherein the A-type resonators are respectively connected with a signal input or output port, and the A-type resonators are respectively and exclusively coupled with the B-type resonators; the coupling connection is realized by an adjustable coupling unit; and N is the maximum connectable branch number of the single-pole multi-throw filter switch. The invention realizes a single-pole multi-throw filtering switch method with reconfigurable center frequency by fixing the magnetic coupling between the filters and changing the electric coupling between the filters so as to ensure that the coupling coefficient is zero.
Description
Technical Field
The invention belongs to the field of wireless communication systems, relates to a switch circuit technology in a wireless communication system, and particularly relates to a frequency-adjustable single-pole multi-throw filter switch, a switch circuit based on the single-pole multi-throw filter switch and a circuit control method for realizing the function of the switch circuit.
Background
Wireless communication is a communication method for exchanging information by using the characteristic that electromagnetic wave signals propagate in free space, and in the field of information communication in recent years, the most developed and widely used wireless communication technology is the one. Wireless communications implemented in mobile are also commonly referred to as mobile communications, and collectively referred to as wireless mobile communications. With the development of wireless communication technology, the switching radio frequency system is widely applied to wireless communication.
In a conventional antenna front-end system, a band-pass filter, a single-pole multi-throw switch, an omnidirectional antenna and several directional antennas are typically included. When the single-pole multi-throw switch is switched to the omnidirectional antenna, the signal is broadcasted in an omnidirectional way. When switched to a directional antenna, signals can be transmitted or received in a particular direction. Thus, the function of beam scanning can be achieved by sequentially switching the directional antennas. This mode needs a large amount of components and parts, and the integrated level is low, can occupy a large amount of physical space.
With the rapid increase of communication demand, the circuit implementation scheme with low integration level is called as a technical development bottleneck in more and more fields, and the forward development progress of the whole technical system is influenced.
Disclosure of Invention
Aiming at the technical defect of low integration level of a single-pole multi-throw switch circuit in the existing wireless communication system, the invention provides a frequency-adjustable single-pole multi-throw filter switch, a switch circuit based on the single-pole multi-throw filter switch and a circuit control method for realizing the function of the switch circuit.
According to one aspect of the present invention, there is provided a frequency tunable single pole multiple throw filter switch comprising N +1 class a resonators and 1 class B resonator formed on a dielectric substrate,
the A-type resonators are respectively connected with a signal input port or a signal output port, and the A-type resonators are respectively and exclusively coupled with the B-type resonators;
the coupling connection is realized by an adjustable coupling unit;
and N is the maximum connectable branch number of the single-pole multi-throw filter switch.
As one alternative of the invention, the adjustable coupling unit of the single-pole multi-throw filter switch comprises a magnetic coupling component and an electric coupling component, and the coupling coefficient of at least one of the magnetic coupling component and the electric coupling component is adjustable.
As one of the alternatives of the present invention, the single-pole multi-throw filter switch includes an electric coupling component including a first varactor and a second varactor, cathodes of the first varactor and the second varactor are connected, and a bias voltage loading terminal P is disposed at a cathode of the varactor;
the anode of the first varactor diode is coupled with the A-type resonator, and the anode of the second varactor diode is coupled with the B-type resonator.
As one alternative of the invention, the resonator of the single-pole multi-throw filter switch comprises a frequency modulation unit, and the frequency modulation unit is used for adjusting the resonant frequency of the resonator.
As one of the alternatives of the invention, the frequency modulation unit of the single-pole multi-throw filter switch comprises a copper foil and a piezoelectric actuation component which are sequentially covered on the position M of the dielectric substrate;
the position of the dielectric substrate M is the projection position of the corresponding resonator on the surface of the dielectric substrate opposite to the surface on which the resonator is arranged.
As an alternative of the present invention, in the single-pole multi-throw filter switch, in the electrical coupling component, a resistor R is electrically connected in series between the voltage loading terminal P and the cathode of the varactor, and the resistor R is 100k Ω.
As an alternative of the present invention, in the single-pole multi-throw filter switch, the value of N is an integer not less than 2 and not more than 5.
According to an aspect of the present invention, there is provided a frequency tunable single-pole multi-throw filter switch circuit including at least one of the filter switches, characterized in that the switch circuit includes a control power supply including a switch control unit and a frequency modulation control unit;
the switch control unit comprises N +1 groups of output ends Vkn capable of outputting independent variable voltage signals, the output end Vkn is connected with the nth group of bias voltage loading ends P, the coupling coefficient of an electric coupling component corresponding to the nth group of bias voltage loading ends P is adjusted by outputting different voltage signals, and the value of N is a positive integer not greater than N + 1;
the frequency modulation control unit comprises N +2 groups of output ends Vti capable of outputting independent variable voltage signals, the output ends Vti are connected with the ith group of frequency modulation units, the resonance frequency of the ith group of resonators is adjusted by outputting different voltage signals, and the value of i is an integer not less than 4 and not more than N + 2.
As one of the alternatives of the present invention, the switch control unit of the single-pole multi-throw filter switch circuit comprises N +1 groups of voltage presetting assemblies, wherein the nth group of voltage presetting assemblies comprises an input end, a control end, a setting storage module and an output end Vkn, the input end is used for electric energy input, the control end can input a switch signal, and the output or non-output state of the output end Vkn responds to the switch signal input to the control end;
the setup storage module includes an adjustment submodule to change the value of the output voltage at the output Vkn and a storage submodule to store the state of one or more adjustment submodules.
According to one aspect of the present invention, there is provided a method for controlling a frequency-tunable single-pole multi-throw filter switch circuit, comprising the steps of:
a. designating a signal input or output port connected with one A-type resonator as a switch common end, and designating signal input or output ports connected with other A-type resonators as switch branch ends;
b. calculating the magnetic coupling coefficient between the coupled resonators according to the loop relation between the common end and the branch end;
c. calculating an electric coupling coefficient corresponding to each magnetic coupling coefficient and Vkn corresponding to the electric coupling coefficient according to each magnetic coupling coefficient;
d. adjusting parameters of a setting storage module to enable the output end of the setting storage module to directly output
A voltage value Vkn, and storing the parameter in the setting storage module;
e. and inputting a corresponding switch signal to the control end of the setting storage module so as to open or close the switch branch where the setting storage module is located.
The invention realizes a single-pole multi-throw filtering switch method with reconfigurable center frequency by fixing the magnetic coupling between the filters and changing the electric coupling between the filters so as to ensure that the coupling coefficient is zero. The capacitive load is realized by slotting and copper plating on the substrate, the branch is added on the capacitive load, the other end of the branch is perforated with a through hole and connected to the back surface loading variable capacitance diode, the electric coupling is equal to the magnetic coupling by selecting a proper voltage value, and finally the total coupling coefficient k is equal to 0 or the electric coupling is not equal to the magnetic coupling k is equal to 0. So that a signal input through port1 passes through resonators 1 through 4 through 2 and is output from port 2; two signals from port1 to port3 and from port2 to port3 are in an off state because the coupling coefficient k between port3 and port4 is 0, so no signal passes through. Meanwhile, the interstage coupling variable capacitance diode realizes the frequency adjustable function of the quadrature hybrid filter network by adjusting the bias voltage of the piezoelectric actuator, and the method can realize the function of a single-pole multi-throw filter switch.
Drawings
FIG. 1 is a circuit topology diagram of a single-pole double-throw filter switch according to an embodiment of the present invention;
FIG. 2 is a circuit topology diagram of a single-pole-three-throw filter switch according to an embodiment of the present invention;
FIG. 3 is a circuit topology diagram of a single-pole, four-throw filter switch according to an embodiment of the present invention;
FIG. 4 is a circuit topology diagram of a single-pole five-throw filter switch according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a circuit network of a single-pole double-throw filter switch according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a single pole, triple throw filter switch circuit network according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a circuit network of a single-pole, four-throw filter switch according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a circuit network of a SPDT filter switch according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a single pole double throw filter switch circuit equipped piezoelectric actuator according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a single pole, triple throw filter switch circuit equipped piezoelectric actuator according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a single pole, four throw filter switch circuit equipped piezoelectric actuator according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a single pole, five throw filter switch circuit equipped piezoelectric actuator according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a circuit of a single-pole, four-throw filter switch according to an embodiment of the present invention;
FIG. 14 is a schematic diagram of a circuit of a single-pole five-throw filter switch according to an embodiment of the invention;
FIG. 15 is a simulation test chart of S parameter of the single-pole double-throw filter switch circuit according to the embodiment of the present invention;
FIG. 16 is a simulation test chart of S parameter of the single-pole-three-throw filter switch circuit according to the embodiment of the present invention;
FIG. 17 is a simulation test chart of S parameter of the single-pole four-throw filter switch circuit according to the embodiment of the present invention;
fig. 18 is a simulation test chart of the S parameter of the single-pole five-throw filter switch circuit according to the embodiment of the invention.
Detailed Description
The technical means adopted by the invention to achieve the predetermined object of the invention are further described below with reference to the drawings and the preferred embodiments of the invention.
In an optional embodiment of the present invention, a frequency-tunable single-pole multi-throw filter switch is provided, including N +1 a-type resonators and 1B-type resonator formed on a dielectric substrate, where the a-type resonators are respectively connected to a signal input or output port, and the a-type resonators are respectively and uniquely coupled to the B-type resonators;
the coupling connection is realized by an adjustable coupling unit;
and N is the maximum connectable branch number of the single-pole multi-throw filter switch.
In fig. 1, 2, 3 and 4, N takes on values of 2, 3, 4 and 5, respectively.
As an alternative embodiment of the invention, the adjustable coupling unit of the single-pole multi-throw filter switch includes a magnetic coupling component and an electric coupling component, and the coupling coefficient of at least one of the magnetic coupling component and the electric coupling component is adjustable.
As one of the alternative embodiment schemes of the present invention, the single-pole multi-throw filter switch includes an electrical coupling component that includes a first varactor diode and a second varactor diode, cathodes of the first varactor diode and the second varactor diode are connected, and a bias voltage loading terminal P is disposed at a cathode of the varactor diode;
the anode of the first varactor diode is coupled with the A-type resonator, and the anode of the second varactor diode is coupled with the B-type resonator.
As an alternative embodiment of the present invention, a resonator of the single-pole multi-throw filter switch includes a frequency modulation unit, and the frequency modulation unit is configured to adjust a resonant frequency of the resonator.
As one of the alternative embodiment schemes of the present invention, the frequency modulation unit of the single-pole multi-throw filter switch includes a copper foil and a piezoelectric actuation component which are sequentially covered on the dielectric substrate M;
the position of the dielectric substrate M is the projection position of the corresponding resonator on the surface of the dielectric substrate opposite to the surface on which the resonator is arranged.
As an alternative embodiment of the present invention, in the electrical coupling component of the single-pole multi-throw filter switch, a resistor R is electrically connected in series between the voltage loading terminal P and the cathode of the varactor, and the resistor R is 100k Ω.
As an alternative embodiment of the present invention, in the single-pole multi-throw filter switch, the value of N is an integer not less than 2 and not more than 5.
According to an aspect of the embodiments of the present invention, there is provided a frequency tunable single-pole multi-throw filter switch circuit, including at least one of the filter switches, the switch circuit including a control power supply, the control power supply including a switch control unit and a frequency modulation control unit;
the switch control unit comprises N +1 groups of output ends Vkn capable of outputting independent variable voltage signals, the output end Vkn is connected with the nth group of bias voltage loading ends P, the coupling coefficient of an electric coupling component corresponding to the nth group of bias voltage loading ends P is adjusted by outputting different voltage signals, and the value of N is a positive integer not greater than N + 1;
the frequency modulation control unit comprises N +2 groups of output ends Vti capable of outputting independent variable voltage signals, the output ends Vti are connected with the ith group of frequency modulation units, the resonance frequency of the ith group of resonators is adjusted by outputting different voltage signals, and the value of i is an integer not less than 3 and not more than N + 2.
As one of the alternative embodiment schemes of the present invention, the switch control unit of the single-pole multi-throw filter switch circuit includes N +1 groups of voltage presetting assemblies, the nth group of voltage presetting assemblies includes an input end, a control end, a setting storage module and an output end Vkn, the input end is used for electric energy input, the control end can input a switch signal, and the output or non-output state of the output end Vkn responds to the switch signal input to the control end;
the setup storage module includes an adjustment submodule to change the value of the output voltage at the output Vkn and a storage submodule to store the state of one or more adjustment submodules.
According to an aspect of the embodiments of the present invention, there is provided a method for controlling a frequency-tunable single-pole multi-throw filter switch circuit, including the steps of:
a. designating a signal input or output port connected with one A-type resonator as a switch common end, and designating signal input or output ports connected with other A-type resonators as switch branch ends;
b. calculating the magnetic coupling coefficient between the coupled resonators according to the loop relation between the common end and the branch end;
c. calculating an electric coupling coefficient corresponding to each magnetic coupling coefficient and Vkn corresponding to the electric coupling coefficient according to each magnetic coupling coefficient;
d. adjusting parameters of a setting storage module to enable the output end of the setting storage module to directly output
A voltage value Vkn, and storing the parameter in the setting storage module;
e. and inputting a corresponding switch signal to the control end of the setting storage module so as to open or close the switch branch where the setting storage module is located.
Example (b):
the topology is shown in fig. 1 to 4, fig. 1 is a single-pole double-throw filter switch network, fig. 2 is a single-pole triple-throw filter switch network, fig. 3 is a single-pole four-throw filter switch network, and fig. 4 is a single-pole five-throw filter switch network.
Take a single-pole double-throw filter switch as an example, and the rest are analogized in turn. The interstage coupling coefficient relation is as follows: k34 is 0, k14 is not equal to 0, k24 is not equal to 0, a signal is input from the port1, passes through the resonator 1, the resonator 4 and the resonator 2, and is output from the port2, and the path is a third-order filter topology, so that the filter has a band-pass characteristic; since k34 is 0, the signal cannot go from resonator 4 to resonator 3, so the 3-port off state is achieved.
The perspective views of the designed device are shown in fig. 5 to 8, fig. 5 is a single-pole double-throw filter switch network, fig. 6 is a single-pole three-throw filter switch network, fig. 7 is a single-pole four-throw filter switch network, and fig. 8 is a single-pole five-throw filter switch network. Take a single-pole double-throw filter switch as an example, and the rest are analogized in turn. The lower right side of the resonator 1 and the upper left side of the resonator 4 are connected with a branch through a capacitive load, a through hole is formed in the other end of the branch to be connected to a back loading variable capacitance diode, the two variable capacitance diodes C1 and C2 are connected, the C1 and the C2 are connected in series back to back, a reverse bias voltage is loaded on a diode cathode, a voltage source is connected with a variable capacitance diode cathode through a 100k omega patch resistor R1, and the effect of adjusting the interstage coupling of the filter network resonator 1 and the resonator 2 is achieved by changing the voltage value. The upper side of the resonator 2 and the lower side of the resonator 4 are connected with a back loading variable capacitance diode by adding branches in a capacitive load, a through hole is formed in the other end of each branch, the branches are connected with the back loading variable capacitance diode and connected with two variable capacitance diodes C3 and C4, the C3 and the C4 are connected in series back to back, reverse bias voltage is loaded on the cathode of the diode, a voltage source is connected with the cathode of the variable capacitance diode through a 100k omega patch resistor R2, and the effect of adjusting the inter-stage coupling of the filter network resonator 2 and the resonator 4 is achieved by. The left lower side of the resonator 3 and the right upper side of the resonator 4 are connected with a branch through a capacitive load, a through hole is formed in the other end of the branch to be connected to a back loading variable capacitance diode, the branch is connected with two variable capacitance diodes C5 and C6, the C5 and the C6 are connected in series back to back, a reverse bias voltage is loaded on a diode cathode, a voltage source is connected with a variable capacitance diode cathode through a 100k omega patch resistor R3, and the effect of adjusting the interstage coupling of the filter network resonator 3 and the resonator 4 is achieved by changing the voltage value. As shown in fig. 9 to 12, a copper foil is coated on the substrate, the piezoelectric actuator 1 is bonded to the corresponding position of the resonator 1 above the copper foil by using a conductive silver paste, and a bias voltage is applied to the piezoelectric actuator 1 to brake the piezoelectric actuator up and down, thereby achieving the purpose of adjusting the resonant frequency of the resonator 1. And (3) bonding the piezoelectric actuator 2 at the corresponding position of the resonator 2 above the copper foil by using conductive silver paste, and applying bias voltage above the piezoelectric actuator 2 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 2. And (3) bonding the piezoelectric actuator 3 at the corresponding position of the resonator 3 above the copper foil by using conductive silver paste, and applying bias voltage above the piezoelectric actuator 3 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 3. And (3) bonding the piezoelectric actuator 4 by using conductive silver paste at a corresponding position of the resonator 4 above the copper foil, and applying bias voltage above the piezoelectric actuator 4 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 4.
The implementation principle of this embodiment is that a groove is formed in a substrate, copper plating is performed to implement a capacitive load, a branch is added to the capacitive load, a through hole is opened at the other end of the branch to connect to a back-loading varactor, an appropriate voltage value is selected to make electrical coupling equal to magnetic coupling, and finally, the total coupling coefficient k is equal to 0 or make the electrical coupling not equal to the magnetic coupling k ≠ 0. So that a signal input through port1 passes through resonators 1 through 4 through 2 and is output from port 2; two signals from port1 to port3 and from port2 to port3 are in an off state because the coupling coefficient k between port3 and port4 is 0, so no signal passes through. Meanwhile, the frequency adjustable function of an orthogonal hybrid filter network is realized by adjusting the bias voltage of a piezoelectric actuator and an interstage coupling varactor, and the function of a single-pole multi-throw filter switch can be realized by the method, and a single-pole double-throw filter switch network device, a single-pole triple-throw filter switch network device, a single-pole four-throw filter switch network device and a single-pole five-throw filter switch network device are provided in the scheme, so that the single-pole n-throw filter switch (n >5) network device can be realized if the needs exist and the volume meets the conditions.
Example (b):
this embodiment is implemented by using evanescent mode resonators, varactors, fixed resistors, and piezoelectric actuators as shown in fig. 1 to 18, and the dielectric substrate is Rogers4350B and has a thickness of 60 mil. And the input port and the output port are respectively welded with SMA joints. The right lower side of the resonator 1 is connected with the left upper side of the resonator 4 through two variable capacitance diodes C1 and C2, the variable capacitance diodes C1 and C2 are Macom MA46H201 type variable capacitance diodes, the C1 and C2 are connected in series in a back-to-back mode, reverse bias voltage is loaded on the cathode of the diode, the voltage source is connected with the cathode of the variable capacitance diode through a 100k omega patch resistor R1, the patch resistor R1 is an 0402 packaged patch resistor, and the effect of adjusting the inter-stage coupling between the filter network resonator 1 and the resonator 4 is achieved by changing the voltage value. The upper side of the resonator 2 is connected with the lower side of the resonator 4 through two variable capacitance diodes C3 and C4, the variable capacitance diodes C3 and C4 are Macom MA46H201 variable capacitance diodes, the C3 and C4 are connected in series back to back, reverse bias voltage is loaded on the cathode of the diodes, the voltage source is connected with the cathode of the variable capacitance diodes through a 100k omega patch resistor R2, the patch resistor R2 is an 0402 packaged patch resistor, and the effect of adjusting the coupling between the filter network resonator 2 and the resonator 4 is achieved by changing the voltage value. The left lower side of the resonator 3 is connected with the right upper side of the resonator 4 through two variable capacitance diodes C5 and C6, the variable capacitance diodes C5 and C6 are Macom MA46H201 type variable capacitance diodes, the C5 and C6 are connected in series in a back-to-back mode, reverse bias voltage is loaded on the cathode of the diode, the voltage source is connected with the cathode of the variable capacitance diode through a 100k omega patch resistor R3, the patch resistor R3 is an 0402 packaged patch resistor, and the effect of adjusting the inter-stage coupling between the filter network resonator 3 and the resonator 4 is achieved by changing the voltage value. As shown in fig. 9 to 12, a copper foil is coated on a substrate, a conductive silver paste is used to bond the piezoelectric actuator 1 at a position corresponding to the resonator 1 above the copper foil, the piezoelectric actuator 1 is T216-A4NO-05 of Piezo company, and a bias voltage is applied above the piezoelectric actuator 1 to brake the piezoelectric actuator up and down, so as to adjust the resonant frequency of the resonator 1. And (3) bonding the piezoelectric actuator 2 at the corresponding position of the resonator 2 above the copper foil by using conductive silver paste, wherein the piezoelectric actuator 2 adopts T216-A4NO-05 of Piezo company, and a bias voltage is applied to the piezoelectric actuator 2 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 2. And (3) bonding the piezoelectric actuator 3 at the corresponding position of the resonator 3 above the copper foil by using conductive silver paste, wherein the piezoelectric actuator 3 adopts T216-A4NO-05 of Piezo company, and a bias voltage is applied to the piezoelectric actuator 3 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 3. And (3) bonding the piezoelectric actuator 4 by using conductive silver paste at a corresponding position of the resonator 4 above the copper foil, wherein the piezoelectric actuator 4 adopts T216-A4NO-05 of Piezo company, and applying bias voltage above the piezoelectric actuator 4 to brake the piezoelectric actuator up and down so as to achieve the aim of adjusting the resonant frequency of the resonator 4.
Through design, simulation and optimization, the specific size of the reconfigurable single-pole double-throw filter switch network of the embodiment is finally determined as follows:
the length of the edge l1 of the substrate 3 is 103.23mm, the length of the substrate h1 is 1.524mm, the resonant cavity groove D1 is 12mm, the length of the h2 is 20um, the capacitive load D2 is 4mm, and the length of the capacitive load branch l3 is 2.56 mm.
The specific dimensions of the reconfigurable single-pole-three-throw filter switch network are as follows:
the length l1 of the edge of the substrate 4 is 59mm, the length h1 is 1.524mm, the resonant cavity groove D1 is 12mm, the length h2 is 20um, the capacitive load D2 is 4mm, and the length l3 of the capacitive load branch is 2.56 mm.
The specific dimensions of the reconfigurable single-pole four-throw filter switch network are as follows:
the side length l1 of the substrate 5 is 43.3mm, the substrate h1 is 1.524mm, the resonant cavity groove D1 is 12mm, the h2 is 20um, the capacitive load D2 is 4mm, and the capacitive load branch l3 is 2.56 mm.
The specific dimensions of the reconfigurable single-pole five-throw filter switch network are as follows:
the length of the edge l1 of the substrate 6 is 36.37mm, the length of the substrate h1 is 1.524mm, the resonant cavity groove D1 is 12mm, the length of the h2 is 20um, the capacitive load D2 is 4mm, and the length of the capacitive load branch l3 is 2.56 mm.
Fig. 13 and 14 are partial test object diagrams in the above embodiments, and fig. 15 to 18 respectively show the S parameter test results of the above embodiments when the varactor diode is at different capacitance values and the piezoelectric actuator is at different bias voltages by changing the dc bias voltage. Test results show that the design concept of the embodiment is correct and feasible.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "root", "inner", "outer", "peripheral", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the purpose of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Where "inside" refers to an interior or enclosed area or space. "periphery" refers to an area around a particular component or a particular area.
In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the embodiments of the invention, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The frequency-adjustable single-pole multi-throw filter switch comprises N + 1A-type resonators and 1B-type resonator formed on a dielectric substrate,
the A-type resonators are respectively connected with a signal input port or a signal output port, and the A-type resonators are respectively and exclusively coupled with the B-type resonators;
the coupling connection is realized by an adjustable coupling unit;
and N is the maximum connectable branch number of the single-pole multi-throw filter switch.
2. The frequency tunable single-pole-multiple-throw filter switch of claim 1, wherein the tunable coupling unit comprises a magnetic coupling component and an electrical coupling component, at least one of the magnetic coupling component and the electrical coupling component having a tunable coupling coefficient.
3. The frequency-tunable single-pole-multiple-throw filter switch according to claim 2, wherein the electrical coupling component comprises a first varactor and a second varactor, cathodes of the first varactor and the second varactor are connected, and a bias voltage loading terminal P is disposed at a cathode of the varactor;
the anode of the first varactor diode is coupled with the A-type resonator, and the anode of the second varactor diode is coupled with the B-type resonator.
4. The frequency tunable single pole multiple throw filter switch according to any of claims 1 to 3, wherein the resonator comprises a frequency tuning unit for adjusting the resonance frequency of the resonator.
5. The frequency tunable single-pole multi-throw filter switch according to any one of claims 1 to 4, wherein the frequency tuning unit comprises a copper foil and a piezoelectric actuation component sequentially covering M positions of the dielectric substrate;
the position of the dielectric substrate M is the projection position of the corresponding resonator on the surface of the dielectric substrate opposite to the surface on which the resonator is arranged.
6. The frequency tunable single-pole multi-throw filter switch according to claim 4 or 5, wherein a resistor R is electrically connected in series between the voltage loading terminal P and the cathode of the varactor in the electrical coupling assembly, and the resistor R is 100k Ω.
7. The frequency tunable single-pole-multiple-throw filter switch according to any one of claims 1 to 6, wherein N is an integer of not less than 2 and not more than 5.
8. The frequency-adjustable single-pole multi-throw filter switch circuit comprises at least one of the filter switches, and is characterized in that the switch circuit comprises a control power supply, and the control power supply comprises a switch control unit and a frequency modulation control unit;
the switch control unit comprises N +1 groups of output ends Vkn capable of outputting independent variable voltage signals, the output end Vkn is connected with the nth group of bias voltage loading ends P, the coupling coefficient of an electric coupling component corresponding to the nth group of bias voltage loading ends P is adjusted by outputting different voltage signals, and the value of N is a positive integer not greater than N + 1;
the frequency modulation control unit comprises N +2 groups of output ends Vti capable of outputting independent variable voltage signals, the output ends Vti are connected with the ith group of frequency modulation units, the resonance frequency of the ith group of resonators is adjusted by outputting different voltage signals, and the value of i is an integer not less than 3 and not more than N + 2.
9. The fsm circuit of claim 8, wherein the switch control unit comprises N +1 sets of voltage preset components, the nth set of voltage preset components comprises an input terminal for power input, a control terminal for inputting a switching signal, a setting storage module, and an output terminal Vkn, wherein the output or non-output state of the output terminal Vkn is responsive to the input of the switching signal to the control terminal;
the setup storage module includes an adjustment submodule to change the value of the output voltage at the output Vkn and a storage submodule to store the state of one or more adjustment submodules.
10. The frequency-adjustable single-pole multi-throw filter switch circuit control method is characterized by comprising the following steps of:
a. designating a signal input or output port connected with one A-type resonator as a switch common end, and designating signal input or output ports connected with other A-type resonators as switch branch ends;
b. calculating the magnetic coupling coefficient between the coupled resonators according to the loop relation between the common end and the branch end;
c. calculating an electric coupling coefficient corresponding to each magnetic coupling coefficient and Vkn corresponding to the electric coupling coefficient according to each magnetic coupling coefficient;
d. adjusting parameters of a setting storage module to enable an output end of the setting storage module to directly output a voltage value Vkn, and storing the parameters in the setting storage module;
e. and inputting a corresponding switch signal to the control end of the setting storage module so as to open or close the switch branch where the setting storage module is located.
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