CN219740334U - Novel miniaturized frequency hopping filter - Google Patents
Novel miniaturized frequency hopping filter Download PDFInfo
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- CN219740334U CN219740334U CN202321168990.0U CN202321168990U CN219740334U CN 219740334 U CN219740334 U CN 219740334U CN 202321168990 U CN202321168990 U CN 202321168990U CN 219740334 U CN219740334 U CN 219740334U
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- 238000004891 communication Methods 0.000 claims description 10
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- 238000010586 diagram Methods 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 238000004088 simulation Methods 0.000 description 2
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Abstract
The utility model discloses a novel miniaturized frequency hopping filter, which comprises a digital control circuit and a resonant circuit, wherein an integrated decoupling module is arranged at a signal input end; the integrated decoupling module is used for decoupling an input signal into a power supply signal, a digital control signal and a radio frequency signal; the integrated decoupling module comprises an isolation circuit, a power management circuit, a low-pass filter and a high-pass filter, wherein the power management circuit, the low-pass filter and the high-pass filter are respectively connected with the isolation circuit; the output end of the low-pass filter is connected with a digital control circuit; the output end of the Gao Tonglv filter is connected with the resonant circuit, and the output end of the resonant circuit outputs a radio frequency signal. The utility model decouples the input mixed signal into 3 kinds of power supply voltages, a capacitor array control signal and VHF/L radio frequency signals; the overall size of the filter is reduced, and the flexibility of the filter in use is improved.
Description
Technical Field
The utility model relates to the technical field of frequency hopping filters, in particular to a novel miniaturized frequency hopping filter.
Background
Frequency hopping filters are very important integrated devices in frequency hopping communication systems, electromagnetic signals are increasingly dense and complex nowadays, and requirements on anti-interference capability of communication countermeasure equipment are higher and higher. The frequency hopping radio station is used as a new generation of communication countermeasure equipment, has stronger anti-interference and anti-interception capability, and has great superiority in modern electronic warfare. Digitally tuned frequency hopping filters are a key component of the development of new generation communications countermeasure equipment. It is placed in the front end of equipment receiver or transmitter power amplifier (high-power frequency-hopping filter is placed in the rear end of power amplifier) for channel division, blocking-proofing and suppressing unwanted electromagnetic signals. Therefore, the implementation of important indexes such as equipment sensitivity, noise coefficient, intermediate frequency and image frequency suppression is determined to a great extent.
The existing application number 202110729881.0 is taken as an example of a broadband frequency hopping filter, and the conventional frequency hopping filter has more input signals and at least needs 13 different signals, namely radio frequency signals, power supply, memory chip address lines and the like. This results in a relatively large low frequency connector and radio frequency interface for the frequency hopping filter, for example, the commonly used JL5-14TJB-1 low frequency connector, which is 16mm by 6mm in size and is very large, generally occupies 20% of the entire module size, and this aspect of the utility model greatly extrudes the size of the radio frequency resonant tank, resulting in high loss, small Q value, and the like of the final filter, which seriously affects the performance of the frequency hopping filter.
Disclosure of Invention
Therefore, the present utility model aims to provide a novel miniaturized frequency hopping filter, which decouples the input mixed signal into 3 kinds of power supply voltages, capacitor array control signals and VHF/L radio frequency signals; the overall size of the filter is reduced, and the flexibility of the filter in use is improved.
In order to achieve the above purpose, the novel miniaturized frequency hopping filter of the utility model is provided with an integrated decoupling module at a signal input end, and the integrated decoupling module also comprises a digital control circuit and a resonant circuit; the integrated decoupling module is used for decoupling an input signal into a power supply signal, a digital control signal and a radio frequency signal;
the integrated decoupling module comprises an isolation circuit, a power management circuit, a low-pass filter and a high-pass filter, wherein the power management circuit, the low-pass filter and the high-pass filter are respectively connected with the isolation circuit; the output end of the low-pass filter is connected with a digital control circuit; the output end of the Gao Tonglv filter is connected with the resonant circuit, and the output end of the resonant circuit outputs a radio frequency signal.
Further preferably, the isolation circuit includes an ac isolation branch; the alternating current isolation branch circuit is connected with the power management circuit.
Further preferably, the power management circuit adopts a power management chip with a model LT8331, and the power management chip is used for converting the 5V direct current voltage output by the alternating current isolation branch into 120V and +/-3.3V.
Further preferably, the isolation circuit further comprises a direct current isolation branch, and an output end of the direct current isolation branch is connected with an input end of the high-pass filter and an input end of the low-pass filter respectively.
Further preferably, the digital control circuit comprises a singlechip, a numerical control circuit, a driving circuit and a PIN binary capacitor array; the serial communication port of the singlechip is connected with the output end of the low-pass filter, and the parallel communication port, the numerical control circuit and the driving circuit of the singlechip are sequentially connected; the output end of the driving circuit is respectively connected with two PIN binary capacitor arrays; each PIN binary capacitor array is respectively connected with one resonant loop of the resonant circuit.
Still further, the resonant circuit comprises a first resonant circuit, a coupler and a second resonant circuit which are sequentially connected; the first resonant circuit and the second resonant circuit are respectively connected with a PIN binary capacitor array.
Still further, the model of singlechip is STM32F103C8T6.
Compared with the prior art, the novel miniaturized frequency hopping filter disclosed by the utility model has at least the following advantages:
the 3 types of signals with different frequencies on the frequency spectrum used on the original frequency hopping filter are replaced by one mixed signal for combining, the signals are respectively processed on the frequency hopping filter circuit and restored to the required 3 types of power supply voltages, capacitor array control signals and VHF/L radio frequency signals, the low-frequency signal connector occupying at least 20% of the volume is removed, the overall size of the filter can be greatly reduced, and the use flexibility of the filter is improved.
Drawings
Fig. 1 is a schematic structural diagram of a novel miniaturized frequency hopping filter provided by the utility model.
Fig. 2 is a graph of a mixed signal spectrum at an input of the present utility model.
FIG. 3 is a graph showing the frequency spectrum of the AC isolation circuit in the isolation circuit of the present utility model for extracting DC level.
Fig. 4 is a circuit diagram of a filtering process of the mixed signal after the blocking in the present utility model.
Fig. 5 is a circuit diagram of an LC low-pass filter according to the present utility model.
Fig. 6 shows a spectral diagram of an LC low-pass filter according to the utility model.
Fig. 7 is a circuit diagram of an LC high pass filter in the present utility model.
Fig. 8 is a spectrum diagram of an LC high pass filter in accordance with the present utility model.
In the figure: 1. an integrated decoupling module; 2. a digital control circuit; 3. a resonant circuit; 101. an isolation circuit; 102. a power management circuit; 103. a low pass filter; 104. a high pass filter; 1011. a DC isolation branch; 1012. an alternating current isolation branch; 201. a single chip microcomputer; 202. a numerical control circuit; 203. a driving circuit; 204. a PIN binary capacitor array; 205. a PIN binary capacitor array; 301. a first resonant tank; 302. a coupler; 303. a second resonant tank;
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, in one aspect, the present utility model provides a novel miniaturized frequency hopping filter, and an integrated decoupling module 1 is disposed at a signal input end, and further includes a digital control circuit 2 and a resonance circuit 3; the integrated decoupling module 1 is used for decoupling an input signal into a power signal, a digital control signal and a radio frequency signal;
the integrated decoupling module 1 comprises an isolation circuit 101, a power management circuit 102, a low-pass filter 103 and a high-pass filter 104 which are respectively connected with the isolation circuit 101; the output end of the low-pass filter 103 is connected with the digital control circuit 2; the output end of the Gao Tonglv filter is connected with the resonant circuit 3, and the output end of the resonant circuit 3 outputs a radio frequency signal.
The utility model simplifies the input of a single-path power supply with 5V input end, adds a small power supply management circuit on a frequency hopping filter, and the newly added power supply management circuit changes the voltage to 120V and + -3.3V phones to supply digital control signals for use.
The original storage circuit is converted into a small-sized single chip microcomputer on the frequency hopping filter, the original parallel port digital control signal group of A0-A9 is simplified into a single serial digital interface, a configuration table of the capacitor array of the frequency hopping filter is stored in a memory inside the single chip microcomputer in advance, the single chip microcomputer receives signals of the single serial digital interface, and the capacitor array control signals are output through inquiring the configuration table.
The re-planned external input signals are divided into: the mixed signal spectrum diagram of the mixed signal input into the frequency hopping filter through the coaxial line is shown in figure 2 because of different frequencies.
Further, the isolation circuit 101 includes an ac isolation branch 1012; the ac isolation branch 1012 is connected to the power management circuit 102, and the power management circuit 102 uses a power management chip with a model LT 8331.
The mixed input signal firstly takes out direct current voltage 5V through an alternating current isolation circuit, the alternating current isolation circuit generally adopts a relatively large inductor, the taken out direct current level of 5V is sent to a power management circuit for transformation, the power management adopts a DCDC circuit, the power conversion efficiency is ensured, and the converted 120V and +/-3.3V are supplied to a digital part for use. The ac isolation circuit takes out the signal spectrum of the dc level, as shown in figure 3,
as shown in fig. 1 and 4, the isolation circuit 101 further includes a dc isolation branch 1011, where an output terminal of the dc isolation branch 1011 is connected to an input terminal of the high-pass filter 104 and an input terminal of the low-pass filter 103, respectively.
The signal continues to pass through the blocking circuit, the direct current level is filtered out, a large capacitor is generally used as a device of the blocking circuit, and only 10M serial digital signals and 700M radio frequency input signals are reserved:
(1) The mixed signal after being cut off is passed through low-pass filter to separate out 10MHz serial signal, and 10MHz digital signal is sent to single chip microcomputer for table look-up operation. A typical low pass filter is built using lumped LC devices. As shown in fig. 5. FIG. 6 shows a simulation model of a low-pass filter and S21 performance index, the insertion loss is negligible near 10MHz, and the suppression is above-60 dB in the VHF frequency band.
(2) In addition, the mixed signal is filtered by a high-pass filter, the serial digital signal of 10MHz is removed, and only the radio frequency signal of the VHF/L frequency band is left to be sent to a resonant circuit for frequency hopping filtering. A typical high pass filter may also be constituted by an LC filter. As shown in fig. 7. Fig. 8 shows a simulation model of a high-pass filter and S21 performance index, the insertion loss is negligible near the VHF band, and the band below 50MHz is suppressed to-60 dB or more.
Through the processing of the circuit, the mixed signals input by the coaxial line can be classified to obtain the power supply voltage, the parallel digital signals and the radio frequency signals required by the frequency hopping filter, and then the signals are sent to each subsequent functional module for use.
The digital control circuit 2 comprises a singlechip 201, a numerical control circuit 202, a driving circuit 203 and a PIN binary capacitor array; the model of the singlechip 201 is STM32F103C8T6; the serial communication port of the singlechip 201 is connected with the output end of the low-pass filter 103, and the parallel communication port of the singlechip 201, the numerical control circuit 202 and the driving circuit 203 are sequentially connected; the output end of the driving circuit 203 is respectively connected with the first PIN binary capacitor array 204 and the second PIN binary capacitor array 205; wherein the first PIN binary capacitor array 204 is connected to the first resonant tank 301; the second PIN binary capacitor array is connected to the second resonant tank 205.
According to the utility model, 3 types of signals with different frequencies on a frequency spectrum, which are used on an original frequency hopping filter, are replaced by one mixed signal, and are combined, decoupling and restoring are carried out on the frequency hopping filter circuit, so that the required 3 types of power supply voltages, capacitor array control signals and VHF/L radio frequency signals are restored, and the 3 types of power supply signals are used for respectively supplying power to a digital control circuit and a resonant circuit; the singlechip starts to work after the singlechip starts to be supplied with power, and outputs control signals to control the numerical control circuit 202 and the driving circuit 203 according to programs stored in the singlechip, and the driving circuit outputs driving signals to enable the first PIN binary capacitor array 204 and the second PIN binary capacitor array 205 to switch different capacitance values, so that different resonant frequencies of the first resonant circuit and the second resonant circuit are controlled, and frequency hopping point adjustment of the filter is realized. According to the scheme, the low-frequency signal connector occupying at least 20% of the volume is removed, the overall size of the filter can be greatly reduced, and the flexibility of the filter in use is improved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (7)
1. The novel miniaturized frequency hopping filter is characterized in that an integrated decoupling module is arranged at a signal input end and further comprises a digital control circuit and a resonant circuit; the integrated decoupling module is used for decoupling an input signal into a power supply signal, a digital control signal and a radio frequency signal;
the integrated decoupling module comprises an isolation circuit, a power management circuit, a low-pass filter and a high-pass filter, wherein the power management circuit, the low-pass filter and the high-pass filter are respectively connected with the isolation circuit; the output end of the low-pass filter is connected with a digital control circuit; the output end of the Gao Tonglv filter is connected with the resonant circuit, and the output end of the resonant circuit outputs a radio frequency signal.
2. The novel miniaturized frequency hopping filter of claim 1, wherein the isolation circuit comprises an ac isolation branch; the alternating current isolation branch circuit is connected with the power management circuit.
3. The novel miniaturized frequency hopping filter of claim 1, wherein the power management circuit employs a power management chip of model LT8331 for converting the 5V dc voltage output from the ac isolation branch to 120V and ± 3.3V.
4. The novel miniaturized frequency hopping filter of claim 1, wherein the isolation circuit further comprises a dc isolation branch, the output of the dc isolation branch being connected to the input of the high pass filter and the input of the low pass filter, respectively.
5. The novel miniaturized frequency hopping filter of claim 1, wherein the digital control circuit comprises a single chip microcomputer, a numerical control circuit, a driving circuit and a PIN binary capacitor array; the serial communication port of the singlechip is connected with the output end of the low-pass filter, and the parallel communication port, the numerical control circuit and the driving circuit of the singlechip are sequentially connected; the output end of the driving circuit is respectively connected with two PIN binary capacitor arrays; each PIN binary capacitor array is respectively connected with one resonant loop of the resonant circuit.
6. The novel miniaturized frequency hopping filter of claim 5, wherein the resonant circuit comprises a first resonant tank, a coupler, and a second resonant tank connected in sequence; the first resonant circuit and the second resonant circuit are respectively connected with a PIN binary capacitor array.
7. The novel miniaturized frequency hopping filter of claim 5, wherein the single chip microcomputer is of the type STM32F103C8T6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321168990.0U CN219740334U (en) | 2023-05-16 | 2023-05-16 | Novel miniaturized frequency hopping filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321168990.0U CN219740334U (en) | 2023-05-16 | 2023-05-16 | Novel miniaturized frequency hopping filter |
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| CN219740334U true CN219740334U (en) | 2023-09-22 |
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| CN202321168990.0U Active CN219740334U (en) | 2023-05-16 | 2023-05-16 | Novel miniaturized frequency hopping filter |
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2023
- 2023-05-16 CN CN202321168990.0U patent/CN219740334U/en active Active
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