CN114760393B - Radio frequency link applied to four-channel single-bit frequency measurement - Google Patents
Radio frequency link applied to four-channel single-bit frequency measurementDownload PDFInfo
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- CN114760393B CN114760393BCN202210662615.5ACN202210662615ACN114760393BCN 114760393 BCN114760393 BCN 114760393BCN 202210662615 ACN202210662615 ACN 202210662615ACN 114760393 BCN114760393 BCN 114760393B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/24—Frequency-independent attenuators
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/148—Video amplifiers
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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Abstract
Description
Technical Field
The invention relates to the field of radio frequency of four-channel single-bit frequency measurement, in particular to a radio frequency link applied to four-channel single-bit frequency measurement.
Background
With the development of communication technology, in order to realize the purpose of rapid signal measurement, frequency conversion processing of multiple signals is generally required to be realized simultaneously, and after a frequency converter has a mode of converting a single channel into multiple channels, frequency conversion equipment is required to be optimally designed in order to overcome the problems of complex wiring of multiple channels and signal interference of each channel, so as to meet the use requirement.
Disclosure of Invention
In view of the above problems, the present invention provides a radio frequency link applied to four-channel single-bit frequency measurement.
The invention is realized by the following technical scheme:
the input end of the numerical control attenuator is connected with an input radio frequency port, the output end of the numerical control attenuator is connected with the input end of the first amplifier, the output end of the first amplifier is connected with the input end of the second amplifier through a signal processing circuit, the output end of the second amplifier is connected with the input end of the first power divider, one output end of the first power divider is connected with the high-pass filtering frequency band SDLVA detection link, and the other output end of the first power divider is connected with the low-pass filtering frequency band SDLVA detection link.
Further, the numerical control attenuator is specifically a numerical control attenuator which can realize 35dB attenuation dynamic at maximum in 5dB stepping.
Further, the input frequency band of the input radio frequency port is 2-18GHz.
Furthermore, the signal processing circuit comprises a first equalizer and a temperature-compensated attenuator, wherein the input end of the first equalizer is connected with the output end of the first amplifier, the output end of the first equalizer is connected with the input end of the temperature-compensated attenuator, and the output end of the temperature-compensated attenuator is connected with the input end of the second amplifier.
Further, the high-pass filtering band SDLVA detection link includes a second equalizer, a high-pass filter, a mixer, a first low-pass filter, a second power divider, a third amplifier, a fourth amplifier, a fifth amplifier, a sixth amplifier, a seventh amplifier, and a first SDLVA, an input end of the second equalizer is connected to one output end of the first power divider, an output end of the second equalizer is connected to an input end of the high-pass filter, an output end of the high-pass filter is connected to an input end of the second power divider, one output end of the second power divider is connected to an input end of the fourth amplifier, an output end of the fourth amplifier is connected to the first SDLVA, another output end of the second power divider is connected to an input end of the mixer, an output end of the mixer is connected to an input end of the first low-pass filter, an output end of the first low-pass filter is connected to an input end of the fifth amplifier, an output end of the fifth amplifier is connected to an input end of the sixth amplifier, and an output end of the seventh amplifier is connected to an output end of the radio frequency port.
Further, the high-pass filter is a high-pass filter with a 10GHz passband frequency.
Further, the first SDLVA is a HMC948 logarithmic detector.
Further, the low-pass filtering band SDLVA detection link includes a third low-pass filter, a second equalizer, a third power divider, an eighth amplifier, a ninth amplifier, a tenth amplifier, an eleventh amplifier, and a second SDLVA, an input end of the third low-pass filter is connected to another output end of the first power divider, an output end of the third low-pass filter is connected to an input end of the eighth amplifier, an output end of the eighth amplifier is connected to an input end of the second equalizer, an output end of the second equalizer is connected to an input end of the third power divider, an output end of the third power divider is connected to an input end of the ninth amplifier, an output end of the ninth amplifier is connected to an input end of the second SDLVA, another output end of the third power divider is connected to an input end of the tenth amplifier, an output end of the tenth amplifier is connected to an input end of the third equalizer, an output end of the third equalizer is connected to an input end of the eleventh amplifier, and an output end of the eleventh amplifier is connected to a video output port.
Further, the second SDLVA is an AD8317 logarithmic detector.
Furthermore, the types of the first low-pass filter, the second low-pass filter and the third low-pass filter are all low-pass filters with 10GHz passband frequency.
The invention has the beneficial effects that:
the invention can realize the band division and frequency conversion of four input radio frequency signals of 2GHz to 18GHz to output intermediate frequency signals and video detection signals.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a system structure diagram of a radio frequency link applied to four-channel single-bit frequency measurement according to an embodiment of the present invention;
fig. 2 is a structural diagram of a power divider applied to a four-channel single-bit frequency measurement radio frequency link according to an embodiment of the present invention;
fig. 3 is a simulation graph of a 10GHz low-pass filter applied to a radio frequency link for four-channel single-bit frequency measurement according to an embodiment of the present invention;
fig. 4 is a graph of an AD8317 detection curve applied to a four-channel single-bit frequency measurement rf link according to an embodiment of the present invention;
fig. 5 is a diagram of an HMC948 detection curve applied to a four-channel single-bit frequency measurement rf link according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal device applied to four-channel single-bit frequency measurement according to an embodiment of the present invention;
in the figure, 200-terminal device, 210-memory, 211-Random Access Memory (RAM), 212-cache memory, 213-Read Only Memory (ROM), 214-program/utility, 215-program module, 220-processor, 230-bus, 240-peripheral device, 250-input/output (I/O) interface, 260-network adapter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, this embodiment provides a radio frequency link applied to four-channel single-bit frequency measurement, including a numerical control attenuator, a first amplifier, a second amplifier, a first power divider, a high-pass filtering band SDLVA detection link, and a low-pass filtering band SDLVA detection link, where an input end of the numerical control attenuator is connected to an input radio frequency port, an output end of the numerical control attenuator is connected to an input end of the first amplifier, an output end of the first amplifier is connected to an input end of the second amplifier through a signal processing circuit, an output end of the second amplifier is connected to an input end of the first power divider, one output end of the first power divider is connected to the high-pass filtering band SDLVA detection link, and another output end of the first power divider is connected to the low-pass filtering band SDLVA detection link.
Further, the numerical control attenuator is a numerical control attenuator which realizes 35dB attenuation dynamic at maximum in 5dB stepping.
Further, the input frequency band of the input radio frequency port is 2-18GHz.
Furthermore, the signal processing circuit comprises a first equalizer and a temperature-compensated attenuator, wherein the input end of the first equalizer is connected with the output end of the first amplifier, the output end of the first equalizer is connected with the input end of the temperature-compensated attenuator, and the output end of the temperature-compensated attenuator is connected with the input end of the second amplifier.
Further, the high-pass filtering band SDLVA detection link includes a second equalizer, a mixer, a high-pass filter, a first low-pass filter, a second power divider, a third amplifier, a fourth amplifier, a fifth amplifier, a sixth amplifier, a seventh amplifier, and a first SDLVA, an input end of the second equalizer is connected to one output end of the first power divider, an output end of the second equalizer is connected to an input end of the high-pass filter, an output end of the high-pass filter is connected to an input end of the second power divider, one output end of the second power divider is connected to an input end of the fourth amplifier, an output end of the fourth amplifier is connected to the first SDLVA, another output end of the second power divider is connected to an input end of the mixer, an output end of the mixer is connected to an input end of the first low-pass filter, an output end of the first low-pass filter is connected to an input end of the fifth amplifier, an output end of the fifth amplifier is connected to an input end of the sixth amplifier, and an output end of the seventh amplifier is connected to an output end of the radio frequency port.
Further, the high-pass filter is a high-pass filter with a 10GHz passband frequency.
Further, the first SDLVA is a HMC948 logarithmic detector.
Further, the detection link of the low-pass filtering band SDLVA includes a third low-pass filter, a second equalizer, a third power divider, an eighth amplifier, a ninth amplifier, a tenth amplifier, an eleventh amplifier, and a second SDLVA, an input end of the third low-pass filter is connected to an output end of the first power divider, an output end of the third low-pass filter is connected to an input end of the eighth amplifier, an output end of the eighth amplifier is connected to an input end of the second equalizer, an output end of the second equalizer is connected to an input end of the third power divider, an output end of the third power divider is connected to an input end of the ninth amplifier, an output end of the ninth amplifier is connected to an input end of the second SDLVA, another output end of the third power divider is connected to an input end of the tenth amplifier, an output end of the tenth amplifier is connected to an input end of the third equalizer, an output end of the third equalizer is connected to an input end of the eleventh amplifier, and an output end of the eleventh amplifier is connected to a video output port.
Further, the second SDLVA is an AD8317 logarithmic detector.
Furthermore, the models of the first low-pass filter, the second low-pass filter and the third low-pass filter are all low-pass filters with 10GHz passband frequency.
The specific implementation principle of this embodiment is as follows:
1. equipment type selection:
(1) Numerical control attenuator model selection
The protocol requires a large input power range, the maximum input power reaches 10dBm, in order to avoid the link from being excessively saturated, the scheme designs a numerical control attenuator chip with a 5dB stepping 35dB attenuation range, and specific indexes are shown in a table 1:
table 1 numerical control attenuator indicator table.
(2) Amplifier selection
The frequency band of the product covers 2-18GHz, amplifiers are used at multiple places, three types of amplifiers are selected preliminarily according to the scheme, and specific indexes are shown in tables 2 and 3. The HGC362H amplifier covers 2GHz-18GHz and serves as a radio frequency input amplifier, and the HG116FD amplifier meets the amplification requirement of an intermediate frequency band.
TABLE 2 Amplifier HGC362H INDEX
TABLE 3 Amplifier HG116FD index Table
(3) Power divider model selection
In this embodiment, 3 power dividers are used, the frequency band covers 2GHz-18GHz, and for convenience of design, one power divider is uniformly selected, and specific indexes are as shown in fig. 2 and table 4.
TABLE 4 indicator of power divider
(4) Filter index
After the analysis of this embodiment, a 10GHz high-pass filter and a 10GHz low-pass filter are adopted, and the specific indexes of the filters are as shown in fig. 3. Wherein the 10GHz high-pass filter inhibits 17dB and inhibits more than 30dB below 8GHz. The 10GHz low-pass filter 11GHz suppresses 11dB and 12GHz suppresses 41dB. If a higher suppression degree is needed, two channels can be used for each channel, and the out-of-band suppression degree is improved.
(5) SDLVA selection
The SDLVA is needed to be used at 2 positions of the product, and the frequency ranges are 2-10GHz and 10-18GHz respectively. According to the scheme, AD8317 and HMC948 are respectively selected as SDLVA devices, and specific indexes are shown in figures 4 and 5.
The module microwave part mainly inputs four channels of radio frequency signals of 2GHz to 18GHz, divides frequency conversion according to wave bands to output intermediate frequency signals and video detection signals, and sends the intermediate frequency signals and the video detection signals to the single-bit digital processing part.
2. The technical index requirements are as follows:
a) Inputting a radio frequency:
1) The number of paths: 4 paths of reaction;
2) Frequency range: 2GHz to 18GHz;
3) Power range: -60dBm to +10dBm;
4) Input of VSWR: less than or equal to 2dB.
b) Outputting an intermediate frequency:
1) The number of paths: 8 paths of the reaction solution;
2) Frequency range: 2G to 10GHz;
3) Out-of-band rejection: not less than 20dBc (more than 3GHz away from the center frequency);
4) Power range: -10dBm to +10dBm;
5) Small signal gain: 50dB plus or minus 2.5dB;
6) Noise coefficient: less than or equal to 10dB;
7) Stray output power: < -30dBm;
8) Harmonic suppression: > 15dBc;
9) Intermodulation suppression: > 15dBc.
c) And (3) outputting a video:
1) The number of paths: 8-path;
2) Voltage range: 0.2V to 2.2V;
3) Linear dynamic range: greater than 55dB.
Example 2
On the basis ofembodiment 1, this embodiment proposes a radio frequency method applied to four-channel single-bit frequency measurement, wherein the method includes the following steps:
the input radio frequency port firstly passes through a 5dB stepping maximum numerical control attenuator capable of realizing 35dB attenuation dynamic, then the noise coefficient of a link is reduced through a first amplifier and a second amplifier, then the input radio frequency port is divided into two sections of frequencies through a 10GHz high-low pass filter, and the 2-10GHz frequency band is directly output through second SDLVA wave detection and radio frequency amplification; the 10-18GHz frequency band power is divided into two paths, one path enters the first SDLVA detection, and the other path is subjected to frequency conversion to be 2-10GHz intermediate frequency output.
Furthermore, the simulation is simulated, and small signal simulation analysis is carried out.
Example 3
As shown in fig. 6, on the basis ofembodiment 2, this embodiment proposes a terminal device applied to four-channel single-bit frequency measurement, and theterminal device 200 includes at least onememory 210, at least oneprocessor 220, and abus 230 connecting different platform systems.
Thememory 210 may include readable media in the form of volatile memory, such as Random Access Memory (RAM) 211 and/orcache memory 212, and may further include Read Only Memory (ROM) 213.
Thememory 210 further stores a computer program, and the computer program can be executed by theprocessor 220, so that theprocessor 220 executes any one of the radio frequency methods applied to four-channel single-bit frequency measurement in the embodiments of the present application, and a specific implementation manner of the radio frequency method is consistent with the implementation manner and the achieved technical effect described in the embodiments of the method, and details of some of the implementation manner are not repeated.Memory 210 may also include a program/utility 214 having a set (at least one) ofprogram modules 215, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
Accordingly, theprocessor 220 can execute the computer programs described above, as well as execute the programs/utilities 214.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A radio frequency link applied to four-channel single-bit frequency measurement is characterized by comprising a numerical control attenuator, a first amplifier, a second amplifier, a first power divider, a high-pass filtering frequency band SDLVA detection link and a low-pass filtering frequency band SDLVA detection link, wherein the input end of the numerical control attenuator is connected with an input radio frequency port, the output end of the numerical control attenuator is connected with the input end of the first amplifier, the output end of the first amplifier is connected with the input end of the second amplifier through a signal processing circuit, the output end of the second amplifier is connected with the input end of the first power divider, one output end of the first power divider is connected with the high-pass filtering frequency band SDLVA detection link, the other output end of the first power divider is connected with the low-pass filtering frequency band SDLVA detection link, the detection link of the high-pass filtering frequency band SDLVA comprises a second equalizer, a high-pass filter, a mixer, a first low-pass filter, a second power divider, a third amplifier, a fourth amplifier, a fifth amplifier, a sixth amplifier, a seventh amplifier and a first SDLVA, wherein the input end of the second equalizer is connected with one output end of the first power divider, the output end of the second equalizer is connected with the input end of the high-pass filter, the output end of the high-pass filter is connected with the input end of the second power divider, one output end of the second power divider is connected with the input end of the fourth amplifier, the output end of the fourth amplifier is connected with the first SDLVA, the other output end of the second power divider is connected with the input end of the mixer, the output end of the mixer is connected with the input end of the first low-pass filter, the output end of the first low-pass filter is connected with the input end of the fifth amplifier, and the output end of the fifth amplifier is connected with the input end of the second low-pass filter, the output end of the second low-pass filter is connected with the input end of a sixth amplifier, the output end of the sixth amplifier is connected with the input end of a seventh amplifier, and the output end of the seventh amplifier is connected with an output radio frequency port.
2. The RF link for four-channel single-bit frequency measurement according to claim 1, wherein the digitally controlled attenuator is a digitally controlled attenuator with 5dB step size to achieve maximum 35dB attenuation dynamics.
3. The RF link circuit of claim 1, wherein the input RF port has an input frequency range of 2-18GHz.
4. The RF link applied to four-channel single-bit frequency measurement according to claim 1, wherein the signal processing circuit comprises a first equalizer and a temperature-compensated attenuator, an input terminal of the first equalizer is connected to an output terminal of the first amplifier, an output terminal of the first equalizer is connected to an input terminal of the temperature-compensated attenuator, and an output terminal of the temperature-compensated attenuator is connected to an input terminal of the second amplifier.
5. The RF link for four-channel single-bit frequency measurement according to claim 1, wherein the high-pass filter is a high-pass filter with a passband frequency of 10 GHz.
6. A radio frequency link for four-channel single-bit frequency measurement according to claim 1, wherein the first SDLVA is an HMC948 logarithmic detector.
7. The rf link applied to four-channel single-bit frequency measurement according to claim 1, wherein the low-pass filtered band SDLVA detection link includes a third low-pass filter, a second equalizer, a third power divider, an eighth amplifier, a ninth amplifier, a tenth amplifier, an eleventh amplifier, and a second SDLVA, an input end of the third low-pass filter is connected to another output end of the first power divider, an output end of the third low-pass filter is connected to an input end of the eighth amplifier, an output end of the eighth amplifier is connected to an input end of the second equalizer, an output end of the second equalizer is connected to an input end of the third power divider, an output end of the third power divider is connected to an input end of the ninth amplifier, an output end of the ninth amplifier is connected to an input end of the second SDLVA, another output end of the third power divider is connected to an input end of the tenth amplifier, an output end of the tenth amplifier is connected to an input end of the third equalizer, an output end of the third equalizer is connected to an input end of the eleventh amplifier, and an output end of the eleventh amplifier is connected to the video output port.
8. The RF link of claim 7, wherein the second SDLVA is an AD8317 log detector.
9. The RF link for four-channel single-bit frequency measurement according to claim 7, wherein the first low-pass filter, the second low-pass filter and the third low-pass filter are all low-pass filters with 10GHz passband frequency.
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