CN220511089U - Multi-section frequency hopping filter - Google Patents
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- CN220511089U CN220511089U CN202322017574.7U CN202322017574U CN220511089U CN 220511089 U CN220511089 U CN 220511089U CN 202322017574 U CN202322017574 U CN 202322017574U CN 220511089 U CN220511089 U CN 220511089U
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Abstract
A multi-section frequency hopping filter belongs to the technical field of frequency hopping filters and solves the problems of complex mechanism and high debugging difficulty of the traditional frequency hopping filter; one end of the input coupling inductor L1 is used as a radio frequency input end, the other end of the input coupling inductor L1 is respectively connected with the inductance network circuit and the first capacitance switching circuit, one end of the resonance inductor L3 is connected to a connection common point of the input coupling inductor L1 and the first capacitance switching circuit, and the other end of the resonance inductor L3 is grounded; different resonant coupling inductors are selected through the inductance network circuit, passband coupling strength of the frequency hopping filter is adjusted, coupling capacitors with different capacitance values are switched through the first capacitance switching circuit and the second capacitance switching circuit, the frequency hopping filter function of the frequency hopping filter in 10 frequency bands is achieved, extra high voltage and negative voltage power supply are avoided, complexity of circuit design is simplified, and circuit size is effectively reduced.
Description
Technical Field
The utility model belongs to the technical field of frequency hopping filters, and relates to a multi-section frequency hopping filter.
Background
The frequency hopping filter is a digital tuning filter for frequency hopping reception and frequency hopping transmission, plays an important role in a communication system, and can filter out-of-band interference and noise so as to meet the requirements of a radio frequency system and a communication protocol for signal to noise ratio. Along with the increasing complexity of communication protocols, the requirements on the communication protocols and the inside and outside of the frequency bands are also increasing, and the out-of-band noise and interference signals can be filtered by designing a filter, so that the signal to noise ratio of a receiver can be improved, and the out-of-band spurious emissions of a transmitter can be suppressed.
The frequency hopping filter is used as a main component of a military software radio communication system, the quick frequency hopping and filtering functions of the frequency hopping filter ensure the anti-interference performance of a modern military frequency hopping radio station, the conventional frequency hopping filter is switched by adopting PIN diodes, and the frequency hopping filter has complex mechanism and large debugging difficulty although the frequency hopping points are more.
Disclosure of Invention
The utility model aims to solve the technical problems of complex mechanism and high debugging difficulty of the traditional frequency hopping filter.
The utility model solves the technical problems through the following technical scheme:
a multi-stage frequency hopping filter comprising: an input coupling inductance L1, an output coupling inductance L2, a resonance inductance L3, a resonance inductance L4, an inductance network circuit, a first capacitance switching circuit and a second capacitance switching circuit;
one end of the input coupling inductor L1 is used as a radio frequency input end, the other end of the input coupling inductor L1 is connected with the inductance network circuit and the first capacitance switching circuit respectively, one end of the resonance inductor L3 is connected to a connection common point of the input coupling inductor L1 and the first capacitance switching circuit, the other end of the resonance inductor L3 is grounded, one end of the output coupling inductor L2 is used as a radio frequency output end, the other end of the output coupling inductor L2 is connected with the inductance network circuit and the second capacitance switching circuit respectively, one end of the resonance inductor L4 is connected to a connection common point of the output coupling inductor L2 and the second capacitance switching circuit, and the other end of the resonance inductor L4 is grounded.
Further, the inductance network circuit includes: all-two switch chips U3, all-two switch chips U4, resonance coupling inductance L5, resonance coupling inductance L6 and resistance R5; 5 of all-two switch chip U3 # The pin is connected to the common point of the input coupling inductance L1 and the resonance inductance L3, and is 5 of a two-switch chip U4 # The pin is connected to the common point of the input coupling inductor L2 and the resonant inductor L4, one end of the resistor R5 is used as the control end of the inductance network circuit, and the other end of the resistor R5 is connected to the 6 of the all-two switch chip U3 # Pin, 6 of all two switch chips U3 # 6 of pin and all two switch chips U4 # The pins are connected; one end of the resonance coupling inductance L5 is connected with 1 of a two-switch chip U3 # The other end of the resonant coupling inductance L5 is connected with 1 of a two-switch chip U4 # One end of the pin and one end of the resonant coupling inductor L6 are connected with 3 of all two switch chips U3 # The other end of the pin and the resonance coupling inductance L6 is connected with 3 of a two-switch chip U4 # Pins.
Further, the all-two switch chip U3 and the all-two switch chip U4 are SP2T radio frequency switch chips, and the model is SGM11102G.
Further, the first capacitance switching circuit includes: all ten switch chips U1, a pull-up resistor R2, a capacitor C21, a capacitor C22 and coupling capacitors C0-C9; 9 of all-ten switch chip U1 # The pin is connected with an input coupling inductance L1 and is 2 of a ten-switch chip U1 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # Pins, 12 # Pins, 13 # Pins, 14 # Pins, 15 # Pins are respectively connected with one end of a coupling capacitor C7, a coupling capacitor C9, a coupling capacitor C5, a coupling capacitor C3, a coupling capacitor C1, a coupling capacitor C2, a coupling capacitor C4, a coupling capacitor C6, a coupling capacitor C0 and one end of a coupling capacitor C8, the other ends of the coupling capacitors C0-C9 are grounded, and the pin is connected with 19 of a ten-switch chip U1 # Pins and 20 # The pin is used as the control end of the first capacitance switching circuit, and one end of the pull-up resistor R1 is connected with 19 of all ten switch chips U1 # The other end of the pull-up resistor R1 is connected with one end of the pull-up resistor R2 and then connected with a power supply, and the other end of the pull-up resistor R2 is connected with 20 of a ten-switch chip U1 # PinOne end of the capacitor C21 is connected with one end of the capacitor C22 and then grounded, the other end of the capacitor C21 is connected with the other end of the capacitor C22 and then connected with a power supply, and the other end of the capacitor C21 is connected with 17 of a ten-switch chip U1 # Pins and 18 # The pins are connected together and then connected to a common point of connection between the capacitor C21 and the power supply.
Further, the second capacitance switching circuit includes: all ten switch chips U2, a pull-up resistor R3, a pull-up resistor R4 and coupling capacitors C10-C19; 9 of all-ten switch chip U2 # Pin connection output coupling inductance L2, all ten switch chips U2 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # Pins, 12 # Pins, 13 # Pins, 14 # Pins, 15 # Pins are respectively connected with one end of a coupling capacitor C19, a coupling capacitor C17, a coupling capacitor C15, a coupling capacitor C13, a coupling capacitor C11, a coupling capacitor C12, a coupling capacitor C14, a coupling capacitor C16, a coupling capacitor C18 and a coupling capacitor C10, the other ends of the coupling capacitors C10-C19 are grounded, and the pins are all connected with 19 of a ten-switch chip U2 # Pins and 20 # The pin is used as a control end of the second capacitance switching circuit; one end of the pull-up resistor R3 is connected with 19 of a ten-switch chip U2 # The other end of the pull-up resistor R3 is connected with one end of the pull-up resistor R4 and then connected with a power supply, and the other end of the pull-up resistor R4 is connected with 20 of a ten-switch chip U2 # Pins.
Further, the all-ten switch chip U1 and the all-ten switch chip U2 are SP10T radio frequency switch chips, and the model is SGM72110G.
The utility model has the advantages that: according to the utility model, different resonant coupling inductors are selected through the inductance network circuit, the passband coupling strength of the frequency hopping filter is regulated, the coupling capacitors with different capacitance values are switched through the first capacitance switching circuit and the second capacitance switching circuit, the frequency hopping filter function of the frequency hopping filter in 10 frequency bands is realized, extra high voltage and negative voltage power supply are avoided, the complexity of circuit design is simplified, and the circuit size is effectively reduced.
Drawings
Fig. 1 is a circuit configuration diagram of a ten-stage frequency hopping filter according to the first embodiment of the present utility model;
fig. 2 is an inductance network circuit of a ten-segment frequency hopping filter according to the first embodiment of the present utility model;
fig. 3 is a first capacitance switching circuit of a ten-stage frequency hopping filter according to the first embodiment of the present utility model;
fig. 4 is a second capacitance switching circuit of a ten-stage frequency hopping filter according to the first embodiment of the present utility model;
fig. 5 is an S-parameter diagram of a ten-segment frequency hopping filter according to the second embodiment of the present utility model;
fig. 6 is an S-parameter diagram of a ten-segment frequency hopping filter according to the third embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments:
example 1
As shown in fig. 1, the present utility model provides a multi-stage frequency hopping filter, comprising: an input coupling inductance L1, an output coupling inductance L2, a resonance inductance L3, a resonance inductance L4, an inductance network circuit, a first capacitance switching circuit and a second capacitance switching circuit;
one end of the input coupling inductor L1 is used as a radio frequency input end, the other end of the input coupling inductor L1 is respectively connected with the inductance network circuit and the first capacitance switching circuit, one end of the resonance inductor L3 is connected to a connection common point of the input coupling inductor L1 and the first capacitance switching circuit, and the other end of the resonance inductor L3 is grounded; one end of the output coupling inductor L2 is used as a radio frequency output end, the other end of the output coupling inductor L2 is respectively connected with the inductance network circuit and the second capacitance switching circuit, one end of the resonance inductor L4 is connected to a connection common point of the output coupling inductor L2 and the second capacitance switching circuit, and the other end of the resonance inductor L4 is grounded.
The embodiment provides a ten-section frequency hopping filter, a radio frequency input port is respectively connected with an inductance network circuit, a first capacitance switching circuit and a resonance inductance L3 through an input coupling inductance L1, a radio frequency output port is respectively connected with an inductance network circuit, a second capacitance switching circuit and a resonance inductance L4 through an output coupling inductance L2, the inductance network is used for adjusting the passband coupling strength of the frequency hopping filter, and the first capacitance switching circuit and the second capacitance switching circuit are used for switching coupling capacitances to realize the switching of the filter in 10 frequency bands.
As shown in fig. 2, the inductance network circuit includes: all-two switch chips U3, all-two switch chips U4, resonance coupling inductance L5, resonance coupling inductance L6 and resistance R5; 5 of all-two switch chip U3 # The pin is connected to the common point of the input coupling inductance L1 and the resonance inductance L3, and is 5 of a two-switch chip U4 # The pin is connected to a connection common point of the input coupling inductor L2 and the resonant inductor L4; one end of the resistor R5 is used as a control end of the inductance network circuit, and the other end of the resistor R5 is connected with 6 of a two-switch chip U3 # Pin, 6 of all two switch chips U3 # 6 of pin and all two switch chips U4 # The pins are connected; one end of the resonance coupling inductance L5 is connected with 1 of a two-switch chip U3 # The other end of the resonant coupling inductance L5 is connected with 1 of a two-switch chip U4 # One end of the pin and one end of the resonant coupling inductor L6 are connected with 3 of all two switch chips U3 # The other end of the pin and the resonance coupling inductance L6 is connected with 3 of a two-switch chip U4 # Pins.
In fig. 2, the RF1 and RF2 function pins of all two switch chips U3 and U4 are respectively connected to two ends of the resonant coupling inductors L5 and L6, the external control pin l_tune is respectively connected to the function pins VCTL of all two switch chips U3 and U4 through the resistor R5, when the external control pin l_tune is at a low level, the RF1 function pin of all two switch chips U3 and U4 is connected to the RFC function pin, and the resonant coupling inductor L5 is connected to the filter circuit; when the external control pin L_TUNE is at a high level, the RF2 function pins of all the two switch chips U3 and U4 are communicated with the RFC function pins, and the resonance coupling inductor L6 is connected into the filter circuit; the resonant coupling inductors L5 and L6 are switched on and off through all the two switch chips U3 and U4, and when the frequency hopping filter works, one of the resonant coupling inductors L5 and L6 is switched on and used for adjusting the passband coupling strength of the frequency hopping filter.
All two switch chips U3 and U4 adopt SP2T radio frequency switch chips, and the model of the SP2T radio frequency switch chip in the embodiment is SGM11102G.
As shown in fig. 3, the first capacitance switching circuit includes: all ten switch chips U1, a pull-up resistor R2, a capacitor C21, a capacitor C22 and coupling capacitors C0-C9; 9 of all-ten switch chip U1 # The pin is connected with an input coupling inductor L1; 2 of all ten switch chips U1 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # Pins, 12 # Pins, 13 # Pins, 14 # Pins, 15 # The pins are respectively connected with one ends of a coupling capacitor C7, a coupling capacitor C9, a coupling capacitor C5, a coupling capacitor C3, a coupling capacitor C1, a coupling capacitor C2, a coupling capacitor C4, a coupling capacitor C6, a coupling capacitor C0 and a coupling capacitor C8, and the other ends of the coupling capacitors C0-C9 are grounded; 19 of all-ten switch chip U1 # Pins and 20 # The pin is used as a control end of the first capacitance switching circuit; one end of the pull-up resistor R1 is connected with 19 of a ten-switch chip U1 # The other end of the pull-up resistor R1 is connected with one end of the pull-up resistor R2 and then connected with a power supply, and the other end of the pull-up resistor R2 is connected with 20 of a ten-switch chip U1 # Pins; one end of the capacitor C21 is connected with one end of the capacitor C22 and then grounded, the other end of the capacitor C21 is connected with the other end of the capacitor C22 and then connected with a power supply, and the other end of the capacitor C21 is connected with 17 of a ten-switch chip U1 # Pins and 18 # The pins are connected together and then connected to a common point of connection between the capacitor C21 and the power supply.
In fig. 3, the RF 1-RF 10 function pins of all ten switch chips U1 are respectively connected to a coupling capacitor C8, a coupling capacitor C0, a coupling capacitor C6, a coupling capacitor C4, a coupling capacitor C2, a coupling capacitor C1, a coupling capacitor C3, a coupling capacitor C5, a coupling capacitor C9, and a coupling capacitor C7, the capacitance values of the 10 coupling capacitors are different, the other ends of the capacitors are connected to ground, external signals SDA and SCL are respectively connected to the function pins SDA and SCL of the chips U1 after passing through pull-up resistors R1 and R2, and an external system controls channel switching of the chips U1 through IIC protocol communication, thereby controlling switching of the coupling capacitors C0-C9.
All ten switch chips U1 adopt SP10T radio frequency switch chips, and the model of the SP10T radio frequency switch chip in the embodiment is SGM72110.
As shown in fig. 4, the second capacitance switching circuit includes: all ten switch chips U2, a pull-up resistor R3, a pull-up resistor R4 and coupling capacitors C10-C19; 9 of all-ten switch chip U2 # The pin is connected with an output coupling inductance L2; 2 of all ten switch chips U2 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # Pins, 12 # Pins, 13 # Pins, 14 # Pins, 15 # The pins are respectively connected with one ends of a coupling capacitor C19, a coupling capacitor C17, a coupling capacitor C15, a coupling capacitor C13, a coupling capacitor C11, a coupling capacitor C12, a coupling capacitor C14, a coupling capacitor C16, a coupling capacitor C18 and a coupling capacitor C10, and the other ends of the coupling capacitors C10-C19 are grounded; 19 of all ten switch chips U2 # Pins and 20 # The pin is used as a control end of the second capacitance switching circuit; one end of the pull-up resistor R3 is connected with 19 of a ten-switch chip U2 # The other end of the pull-up resistor R3 is connected with one end of the pull-up resistor R4 and then connected with a power supply, and the other end of the pull-up resistor R4 is connected with 20 of a ten-switch chip U2 # Pins;
in fig. 4, the RF 1-RF 10 function pins of all ten switch chips U2 are respectively connected to a coupling capacitor C10, a coupling capacitor C18, a coupling capacitor C16, a coupling capacitor C14, a coupling capacitor C12, a coupling capacitor C11, a coupling capacitor C13, a coupling capacitor C15, a coupling capacitor C17 and a coupling capacitor C19, the capacitance values of the 10 coupling capacitors are different, the other ends of the capacitors are connected to ground, external signals SDA and SCL are respectively connected to the function pins SDA and SCL of the chips U2 after passing through pull-up resistors R3 and R4, and an external system controls the channel switching of the chips U2 through IIC protocol communication, thereby controlling the switching of the coupling capacitors C10-C19.
In this embodiment, the coupling capacitors corresponding to the pins at the same position of all the tenth switch chips U1 and U2 are selected correspondingly, and the capacitance values are the same, for example, the coupling capacitor C8 connected to the functional pin of the RF1 of all the tenth switch chips U1 is the same as the coupling capacitor C10 connected to the functional pin of the RF1 of all the tenth switch chips U2, and are selected simultaneously when receiving the external control signal, and the first capacitor switching circuit and the second capacitor switching circuit are used for switching the coupling capacitors, so as to realize the switching of the filter in 10 frequency bands.
All ten switch chips U2 adopt SP10T radio frequency switch chips, and the model of the SP10T radio frequency switch chip in the embodiment is SGM72110.
Working principle: according to the embodiment, the IIC signal is controlled to switch the channels of all ten switch chips U1 and U2 through the SDA and SCL function pins, the coupling capacitors with different capacitance values are switched, the filter is switched in 10 frequency bands, meanwhile, the resonance coupling inductors L5 and L6 are controlled to be on-off through the external control pin L_TUNE, and when the frequency hopping filter works, one of the resonance coupling inductors L5 and L6 is connected and used for adjusting the passband coupling strength of the frequency hopping filter, so that the frequency hopping filter can realize the frequency selecting and filtering functions of the frequency hopping filter switched in 10 frequency bands without additional high voltage and negative voltage power supply as long as VCC supplies power in the working process of the frequency hopping filter.
Example two
The electrical characteristics of the multi-section frequency hopping filter are represented by the S parameter diagram.
S parameter is also called scattering parameter, which is a group of important parameters in microwave transmission; since it is difficult to measure current or voltage in a high frequency band, the electrical properties and performance of a radio frequency element or network, such as measuring gain, loss, reflection coefficient, etc., are characterized by measuring S-parameters.
The embodiment provides a ten-section frequency hopping filter, wherein the inductance value of an input coupling inductance L1 and an output coupling inductance L2 is 13nH, the inductance value of resonant inductances L3 and L4 is 1.6nH, the inductance value of resonant coupling inductances L5 and L6 is 34nH, the capacitance values of coupling capacitances C0-C9 are 4pF, 4.5pF, 5pF, 5.5pF, 6pF, 6.5pF, 7pF, 7.5pF, 8pF and 8.5pF, and the capacitance values of coupling capacitances C10-C19 are 4pF, 4.5pF, 5pF, 5.5pF, 6pF, 6.5pF, 7pF, 7.5pF, 8pF and 8.5pF;
fig. 5 is an S-parameter diagram of the frequency hopping filter when the coupling capacitance gates 6 to 8.5pF when the external control pin l_tune is low and the resonant coupling inductance L5 gates.
Example III
The embodiment provides a ten-section frequency hopping filter, wherein the inductance value of an input coupling inductance L1 and an output coupling inductance L2 is 13nH, the inductance value of resonant inductances L3 and L4 is 1.6nH, the inductance value of resonant coupling inductances L5 and L6 is 34nH, the capacitance values of coupling capacitances C0-C9 are 4pF, 4.5pF, 5pF, 5.5pF, 6pF, 6.5pF, 7pF, 7.5pF, 8pF and 8.5pF, and the capacitance values of coupling capacitances C10-C19 are 4pF, 4.5pF, 5pF, 5.5pF, 6pF, 6.5pF, 7pF, 7.5pF, 8pF and 8.5pF;
fig. 5 is an S-parameter diagram of the frequency hopping filter when the coupling capacitance gates 4 to 5.5pF when the external control pin l_tune is high and the resonant coupling inductance L6 gates.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (6)
1. A multi-stage frequency hopping filter, comprising: an input coupling inductance L1, an output coupling inductance L2, a resonance inductance L3, a resonance inductance L4, an inductance network circuit, a first capacitance switching circuit and a second capacitance switching circuit;
one end of the input coupling inductor L1 is used as a radio frequency input end, the other end of the input coupling inductor L1 is respectively connected with the inductance network circuit and the first capacitance switching circuit, one end of the resonance inductor L3 is connected to a connection common point of the input coupling inductor L1 and the first capacitance switching circuit, and the other end of the resonance inductor L3 is grounded; one end of the output coupling inductor L2 is used as a radio frequency output end, the other end of the output coupling inductor L2 is respectively connected with the inductance network circuit and the second capacitance switching circuit, one end of the resonance inductor L4 is connected to a connection common point of the output coupling inductor L2 and the second capacitance switching circuit, and the other end of the resonance inductor L4 is grounded.
2. The multi-segment frequency hopping filter as claimed in claim 1, wherein the inductive network circuit comprises: all-two switch chips U3, all-two switch chips U4, resonance coupling inductance L5, resonance coupling inductance L6 and resistance R5; 5 of all-two switch chip U3 # The pin is connected to the common point of the input coupling inductance L1 and the resonance inductance L3, and is 5 of a two-switch chip U4 # The pin is connected to the common point of the input coupling inductor L2 and the resonant inductor L4, one end of the resistor R5 is used as the control end of the inductance network circuit, and the other end of the resistor R5 is connected to the 6 of the all-two switch chip U3 # Pin, 6 of all two switch chips U3 # 6 of pin and all two switch chips U4 # The pins are connected; one end of the resonance coupling inductance L5 is connected with 1 of a two-switch chip U3 # The other end of the resonant coupling inductance L5 is connected with 1 of a two-switch chip U4 # One end of the pin and one end of the resonant coupling inductor L6 are connected with 3 of all two switch chips U3 # The other end of the pin and the resonance coupling inductance L6 is connected with 3 of a two-switch chip U4 # Pins.
3. The multi-band hopping filter as claimed in claim 2, wherein the all-two switching chip U3 and the all-two switching chip U4 are SP2T rf switching chips, and the model number is SGM11102G.
4. The multi-segment frequency hopping filter as claimed in claim 1, wherein the first capacitance switching circuit comprises: all ten switch chips U1, a pull-up resistor R2, a capacitor C21, a capacitor C22 and coupling capacitors C0-C9; 9 of all-ten switch chip U1 # The pin is connected with an input coupling inductance L1 and is 2 of a ten-switch chip U1 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # Pins, 12 # Pins, 13 # Pins, 14 # Pins, 15 # Pins are respectively connected with one end of a coupling capacitor C7, a coupling capacitor C9, a coupling capacitor C5, a coupling capacitor C3, a coupling capacitor C1, a coupling capacitor C2, a coupling capacitor C4, a coupling capacitor C6, a coupling capacitor C0 and one end of a coupling capacitor C8, the other ends of the coupling capacitors C0-C9 are grounded, and the pin is connected with 19 of a ten-switch chip U1 # Pins and 20 # The pin is used as the control end of the first capacitance switching circuit, and one end of the pull-up resistor R1 is connected with 19 of all ten switch chips U1 # The other end of the pull-up resistor R1 is connected with one end of the pull-up resistor R2 and then connected with a power supply, and the other end of the pull-up resistor R2 is connected with 20 of a ten-switch chip U1 # A pin, one end of the capacitor C21 is connected with one end of the capacitor C22 and then grounded, the other end of the capacitor C21 is connected with the other end of the capacitor C22 and then connected with a power supply, and the pin is connected with 17 of a ten-switch chip U1 # Pins and 18 # The pins are connected together and then connected to a common point of connection between the capacitor C21 and the power supply.
5. The multi-band frequency hopping filter as set forth in claim 4, wherein said second capacitive switching circuit comprises: all ten switch chips U2, a pull-up resistor R3, a pull-up resistor R4 and coupling capacitors C10-C19; 9 of all-ten switch chip U2 # Pin connection output coupling inductance L2, all ten switch chips U2 # Pin, 3 # Pins, 4 # Pin, 5 # Pins, 6 # Pins, 11 # A pin(s),12 # Pins, 13 # Pins, 14 # Pins, 15 # Pins are respectively connected with one end of a coupling capacitor C19, a coupling capacitor C17, a coupling capacitor C15, a coupling capacitor C13, a coupling capacitor C11, a coupling capacitor C12, a coupling capacitor C14, a coupling capacitor C16, a coupling capacitor C18 and a coupling capacitor C10, the other ends of the coupling capacitors C10-C19 are grounded, and the pins are all connected with 19 of a ten-switch chip U2 # Pins and 20 # The pin is used as a control end of the second capacitance switching circuit; one end of the pull-up resistor R3 is connected with 19 of a ten-switch chip U2 # The other end of the pull-up resistor R3 is connected with one end of the pull-up resistor R4 and then connected with a power supply, and the other end of the pull-up resistor R4 is connected with 20 of a ten-switch chip U2 # Pins.
6. The multi-segment frequency hopping filter as claimed in claim 5, wherein the all-ten switching chip U1 and the all-ten switching chip U2 are SP10T radio frequency switching chips, and are of the SGM72110G type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322017574.7U CN220511089U (en) | 2023-07-28 | 2023-07-28 | Multi-section frequency hopping filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322017574.7U CN220511089U (en) | 2023-07-28 | 2023-07-28 | Multi-section frequency hopping filter |
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| CN220511089U true CN220511089U (en) | 2024-02-20 |
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| CN202322017574.7U Active CN220511089U (en) | 2023-07-28 | 2023-07-28 | Multi-section frequency hopping filter |
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