CN212845878U - Portable vector network analyzer - Google Patents
Portable vector network analyzer Download PDFInfo
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- CN212845878U CN212845878U CN202020777214.0U CN202020777214U CN212845878U CN 212845878 U CN212845878 U CN 212845878U CN 202020777214 U CN202020777214 U CN 202020777214U CN 212845878 U CN212845878 U CN 212845878U
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Abstract
The utility model discloses a portable vector network analyzer, have two radio frequency ports, including TX sending terminal and RX receiving terminal, measuring range 50kHz-1GHz, analog-to-digital converter, gather the initial signal data and send to MCU treater after preliminary treatment, MCU treater carries out the operation analysis processing, send the processing result to LCD screen, clock generator, be used for exporting two routes of fixed frequency difference's signal respectively to first mixer, second mixer and third mixer, overall dimension 125mm 75mm 20mm, adopt 4.3 cun IPS full angle of view liquid crystal touch-sensitive screen, built-in 3.7V 5000mAh lithium cell, duration more than 8 hours, adopt 2.1A heavy current charging chip, shorten the charging time, the extension USB interface realizes supplying power to the outside, can be used as the treasured that charges, adopt the thumb wheel switch of feeling excellence, the operation feeling is better, Chinese and English menus can be switched, and the firmware can be upgraded in a virtual USB flash disk mode. The all-metal body can effectively shield electromagnetic interference.
Description
Technical Field
The utility model relates to a radio frequency measurement and frequency domain analysis technical field especially relate to a portable vector network analyzer.
Background
The existing portable vector network analyzer mainly has the following defects:
1) the liquid crystal screen is too small in size, and the operation feelings of the impeller, the power switch and the like are poor; 2) the standby time is short, and the charging speed is slow; 3) upgrading user program operation is complex, 4) the overall performance of a product still has a large promotion space, and the existing NanaoVNA-F type portable vector network analyzer adopts a three-way thumb wheel switch to perform menu operation, the thumb wheel switch has three operations of dialing up, dialing down and pressing down, menu selection and confirmation can be realized, and mark points on a measurement curve can be moved, but the following main defects exist: the thumb wheel switch is relatively hard to toggle, resistance is large when the thumb wheel switch is pressed down, hand feeling is poor, operability is not high, use is inconvenient, the thumb wheel switch is easy to damage, and key operation force is difficult to control, so that the whole part is easy to damage.
Chinese patent application publication No. CN104204840A, published as 2014-12-10, entitled "vector network analyzer," discloses providing a vector network analyzer, which does not require a measurement point for comb generator measurement, the hardware corresponds to hardware for linear measurement according to VNA, and any known calibration method for frequency conversion measurement can be performed using VNA according to the present invention, in the case where the measurement data of the reference measurement point is set to a fixed value. The VNA according to the invention only needs to be calibrated once in a full frequency conversion at the measurement adapter (before the measurement cable). Due to reciprocity, errors in the linear measurement cable can be separately calibrated out using standard calibration methods used in linear measurement techniques (e.g., MSO). The invention enables a VNA to be implemented using only one measurement point for each measurement port, where the measurement point can measure both linear and non-linear scattering parameters (S-parameters). The VNA can be used to perform measurements of linear components and measurements of nonlinear components by reducing hardware compared to the prior art. Omitting the reference measurement point means that fewer measurements have to be performed, resulting in faster measurement times. This effect is particularly evident for frequency translation measurements. These measurements can be performed in real time with the new architecture (concept of n test points). The hardware requirements of the linear device and the frequency conversion device are substantially the same.
However, although the vector analyzer has high precision, the vector analyzer is not convenient to carry about, lacks man-machine exchange function, and is troublesome to use, so that the portable vector network analyzer is designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the weak point among the prior art, provide a small and exquisite portable, measuring range is wide, the simple operation, the time of endurance is long, and it is convenient to upgrade the firmware, and is anti-interference, durable portable vector network analyzer.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a portable vector network analyzer is provided with two radio frequency ports, including a TX transmitting end and an RX receiving end, and the measuring range is 50kHz-1 GHz;
the analog-to-digital converter is used for acquiring original signal data, performing primary processing on the original signal data, transmitting the processed signal data to the MCU processor, performing operation analysis processing on the MCU processor, and transmitting a processing result to the LCD screen;
the clock generator is used for outputting two paths of signals with fixed frequency difference to the first mixer, the second mixer and the third mixer respectively, wherein: the first frequency mixer is connected with an RX receiving end, local oscillation signals and RX receiving end input signals are sent to an analog-to-digital converter IN1 end after passing through the first frequency mixer, two paths of clock signals are sent to an analog-to-digital converter IN2 end after passing through the second frequency mixer, an electric bridge is arranged between the clock generator and the third frequency mixer, reflection signals and local oscillation signals generated by unbalance of the electric bridge are mixed and then sent to an analog-to-digital converter IN3 end, and the electric bridge is further connected with a TX sending end.
Preferably, the portable vector network analyzer further comprises a power storage power supply part, wherein the power storage power supply part comprises a Type-C interface, a power manager and a lithium battery, the power manager is respectively connected with the LDO low-voltage regulator and the LED driver, the low-voltage regulator is connected with the MCU processor, and the LED driver is connected with the LCD screen.
Preferably, the power manager is an IP5306 chip, the lithium battery is a 5000mAh/3.7V lithium battery, and the 2.1A synchronous switch is used for charging. The high-capacity lithium battery with the voltage of 5000mAh/3.7V is selected, the standby time is longer, the endurance time is about 8 hours, a power management chip is replaced, the part of circuits is optimized, 2.1A synchronous switch charging is carried out, the charging efficiency reaches 91%, the self-adaptive charging current is adjusted, the self-adaptive adapter is used for managing a built-in power supply path, the charging and discharging are carried out while supporting, the maximum 2.4A output current is obtained, the conversion efficiency is as high as 92%, the overvoltage, overcharge, overdischarge and overcurrent discharge protection is input, the overcurrent, overvoltage and short circuit protection is output, and the over-temperature protection of the whole machine is carried out.
Preferably, the LDO low-voltage regulator is an LDO 3.3V chip, and the LED driver is an MP3302 chip.
Preferably, the Type-C interface is connected with a USB data interface, and the power manager is connected with a USB power supply port and outputs 5V/1A. The Chinese and English menus are switched, and the firmware can be upgraded in a virtual USB flash disk mode.
Preferably, the LCD screen is connected with a touch screen controller XPT2046, the touch screen controller is connected with an MCU processor, and the serial flash memory W25Q128 is connected with the MCU and used for storing firmware and data.
Preferably, the LCD screen is a 4.3-inch IPS TFT-800 × 480 high-resolution touch screen. By adopting the 4.3-inch IPS full-view liquid crystal touch screen, the visual angle is large, the brightness is high, the color is bright, the touch experience is better, and Chinese and English menu switching is supported.
Preferably, the clock generator comprises a 26.000MHZ crystal oscillator and a Si5351A square wave generator.
Preferably, the MCU processor is connected with a thumb wheel switch, and the power storage power supply part is further provided with a power indicator lamp.
Preferably, the portable vector network analyzer casing is an all-metal body for shielding electromagnetic interference.
The utility model has the advantages that: the portable vector network analyzer is small and portable, wide in measurement range, convenient to operate, long in endurance time, convenient to upgrade firmware, anti-interference, firm and durable.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a schematic view of the overall structure of the present invention;
fig. 4 is a schematic side view of the present invention;
fig. 5 is a schematic view of a part of the structure of the lithium battery of the present invention;
in the figure: PCB mainboard 1, lithium cell 2, ya keli battery support plate 22, screw 220, ribbon 3, SMA head 4, Type-C interface 5, switch 6, USB power supply mouth 7, power indicator 8, thumb wheel switch 9, aluminium system shell 10.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
Example (b):
as shown in the schematic view of figure 1,
a portable vector network analyzer is provided with two radio frequency ports, including a TX transmitting end and an RX receiving end, and the measuring range is 50kHz-1 GHz; the analog-to-digital converter adopts a TLV320AIC3204 chip, acquires original signal data, performs primary processing, and transmits the processed data to the MCU processor, the MCU processor adopts an STM32F 103VxT Cortex-M3 type processor, the MCU processor firstly performs operation analysis processing on the analog-to-digital signal, and transmits a processing result to the LCD screen; the clock generator is composed of a 26.000MHZ crystal oscillator and a Si5351A square wave generator, and is used for outputting two paths of signals with fixed frequency difference to a first mixer, a second mixer and a third mixer respectively, wherein the first mixer, the second mixer and the third mixer are three same SA612AD mixers, and the clock generator is characterized in that: the first frequency mixer is connected with an RX receiving end, local oscillation signals and RX receiving end input signals are sent to an analog-to-digital converter IN1 end after passing through the first frequency mixer, two paths of clock signals are sent to an analog-to-digital converter IN2 end after passing through the second frequency mixer, an electric bridge is arranged between the clock generator and the third frequency mixer, reflection signals and local oscillation signals generated by unbalance of the electric bridge are mixed and then sent to an analog-to-digital converter IN3 end, and the electric bridge is further connected with a TX sending end.
The portable vector network analyzer further comprises an electricity storage power supply part, the electricity storage power supply part comprises a Type-C interface, a power manager and a lithium battery, the power manager is respectively connected with the LDO low-voltage stabilizer and the LED driver, the low-voltage stabilizer is connected with the MCU processor, the LED driver is connected with the LCD screen, and the LCD screen is a 4.3-inch IPS TFT-800 × 480 high-resolution touch screen and supports Chinese and English menu switching.
The power manager is an IP5306 chip, the LDO low-voltage regulator is an LDO 3.3V chip, and the LED driver is an MP3302 chip.
The lithium battery is 5000mAh/3.7V, and is charged by a 2.1A synchronous switch.
The Type-C interface is connected with the USB data interface, and the power manager is connected with the USB power supply port and outputs 5V/1A.
The LCD screen is connected with a touch screen controller XPT2046, the touch screen controller is connected with an MCU processor, and a serial flash memory W25Q128 is connected with the MCU for storing firmware and data.
As shown in fig. 3-5:
the external dimension is 125mm 75mm 20mm, the device is small and portable, the measurement range is 50kHz-1GHz, a 4.3-inch IPS full-view liquid crystal touch screen is adopted, the visual angle is large, all devices are integrally assembled on a PCB (printed Circuit Board) main board 1, a lithium battery 2 is a 5000mAh/3.7V high-capacity lithium battery, the standby time is longer, the theoretical endurance is about 18 hours, a better power management chip is used, the partial circuit is optimized, 2.1A synchronous switch charging is realized, the charging efficiency is up to 91%, the self-adaptive charging current regulation is realized, the self-adaptive adapter is used, the built-in power path management is realized, the charging and discharging are supported, the maximum 2.4A output current is realized, the conversion efficiency is up to 92%, the overvoltage, the overcharge, the overdischarge and discharge protection are realized, the overcurrent, overvoltage and short-circuit protection is realized, and the over.
Also designs a matched acrylic battery carrier plate 22, the easy-to-pull adhesive tape 21 for the battery is pasted on the acrylic battery carrier plate and is fixed by the binding belt 3, the strength is increased, the easy-to-pull adhesive tape is directly fixed on a stud at a specific position on the PCB by a screw 220, and silicon rubber is coated on the stud to prevent the screw from falling off, so that the reliability is increased.
As in fig. 4, be furnished with the LED pilot lamp when charging and discharging, the red light scintillation of charging process, the full charge red light is often bright, and green lamp is often bright in the normal use in-process, and green lamp scintillation when the low-power. The device simultaneously expands a USB power supply port 7 to output 5V/1A, and can be used as a charger to charge the peripheral.
The MCU processor is connected with a thumb wheel switch 9, and the power storage power supply part is also provided with a power indicator light 8; the power supply is turned on while the thumb wheel switch 9 is pressed, the machine enters an updating mode, the machine can be read as a USB flash disk at the moment, the USB flash disk represented by the machine is turned on, the firmware is copied into the USB flash disk, the firmware can be automatically updated by restarting the machine or pulling out a data line, and the operation is simple.
The portable vector network analyzer shell is an all-metal body 10 for shielding electromagnetic interference, the aluminum shell 10 is adopted, the SMA head 4 can be protected to a certain extent, the interference of external electromagnetic waves to the analyzer can be reduced, the dynamic range of the device is better, the measurement is more accurate,
of course, the present invention can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.
Claims (10)
1. A portable vector network analyzer is characterized by comprising two radio frequency ports, a transmitter and a receiver, wherein the two radio frequency ports comprise a TX transmitting end and an RX receiving end, and the measuring range is 50kHz-1 GHz;
the analog-to-digital converter is used for acquiring original signal data, performing primary processing on the original signal data, transmitting the processed signal data to the MCU processor, performing operation analysis processing on the MCU processor, and transmitting a processing result to the LCD screen;
the clock generator is used for outputting two paths of signals with fixed frequency difference to the first mixer, the second mixer and the third mixer respectively, wherein: the first frequency mixer is connected with an RX receiving end, local oscillation signals and RX receiving end input signals are sent to an analog-to-digital converter IN1 end after passing through the first frequency mixer, two paths of clock signals are sent to an analog-to-digital converter IN2 end after passing through the second frequency mixer, an electric bridge is arranged between the clock generator and the third frequency mixer, reflection signals and local oscillation signals generated by unbalance of the electric bridge are mixed and then sent to an analog-to-digital converter IN3 end, and the electric bridge is further connected with a TX sending end.
2. The portable vector network analyzer of claim 1, further comprising a power storage power supply unit, wherein the power storage power supply unit comprises a Type-C interface, a power supply manager and a lithium battery, the power supply manager is respectively connected to the LDO low voltage regulator and the LED driver, the low voltage regulator is connected to the MCU processor, and the LED driver is connected to the LCD screen.
3. The portable vector network analyzer of claim 2, wherein the power manager is an IP5306 chip, the lithium battery is 5000mAh/3.7V lithium battery, and the 2.1A synchronous switch is charged.
4. The portable vector network analyzer of claim 2, wherein the LDO low voltage regulator is an LDO 3.3V chip, and the LED driver is an MP3302 chip.
5. The portable vector network analyzer of claim 2, wherein the Type-C interface is connected to a USB data interface, and the power manager is connected to a USB power supply port to output 5V/1A.
6. The portable vector network analyzer of claim 1, wherein the LCD screen is connected to a touch screen controller XPT2046, the touch screen controller is connected to an MCU processor, and a serial flash memory W25Q128 is connected to the MCU for storing firmware and data.
7. The portable vector network analyzer of claim 1, wherein the LCD screen is a 4.3 inch IPS TFT-800 x 480 high resolution touch screen.
8. The portable vector network analyzer of claim 1, wherein the clock generator comprises a 26.000MHZ crystal oscillator and a Si5351A square wave generator.
9. The portable vector network analyzer of claim 2, wherein the MCU processor is connected to a dial switch, and the power storage power supply unit is further provided with a power indicator.
10. The portable vector network analyzer of claim 1, wherein the portable vector network analyzer housing is an all-metal body for shielding electromagnetic interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020777214.0U CN212845878U (en) | 2020-05-12 | 2020-05-12 | Portable vector network analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020777214.0U CN212845878U (en) | 2020-05-12 | 2020-05-12 | Portable vector network analyzer |
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| CN212845878U true CN212845878U (en) | 2021-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114553329A (en) * | 2022-04-26 | 2022-05-27 | 苏州华兴源创科技股份有限公司 | Vector network analysis system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114553329A (en) * | 2022-04-26 | 2022-05-27 | 苏州华兴源创科技股份有限公司 | Vector network analysis system |
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