CN209264838U - A kind of directional antenna pattern measuring device - Google Patents
A kind of directional antenna pattern measuring device Download PDFInfo
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- CN209264838U CN209264838U CN201822050029.7U CN201822050029U CN209264838U CN 209264838 U CN209264838 U CN 209264838U CN 201822050029 U CN201822050029 U CN 201822050029U CN 209264838 U CN209264838 U CN 209264838U
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Abstract
The utility model discloses a kind of directional antenna pattern measuring devices, including antenna mounting plate to be measured, antenna mounting plate to be measured is for installing antenna to be measured, antenna to be measured is connected to the data input pin of data processing unit by data line, and the data output end of data processing unit is connected to the signal input part of single-chip microcontroller；Antenna mounting plate is mounted on stepper motor, and stepper motor is connected to the first signal output end of single-chip microcontroller；It further include transmitting antenna, transmitting antenna is connected to the second signal output end of single-chip microcontroller by the first radio-frequency signal generator；The utility model can reduce the complexity of directional antenna pattern measurement, reduce measurement cost.
Description
[technical field]
The utility model belongs to directional antenna pattern field of measuring technique more particularly to a kind of directional antenna pattern is surveyed
Measure device.
[background technique]
Antenna is the important component of radar, the product test that many antenna producers can all be Myself, directional aerial side
Test to figure occupies extremely important position in radar performance test.Early stage people carry out directional diagram survey using manual method
Amount, the admission of data, the drafting of directional diagram and the calculating of parameter are all manual modes, complicated for operation, heavy workload, time-consuming
Long, precision is low, and measurement cost is high, and the requirement to operation and maintenance personnel is relatively high, is unfavorable for daily maintenance and maintenance.
[utility model content]
The purpose of the utility model is to provide a kind of directional antenna pattern measuring devices, to reduce directional antenna pattern
The complexity of measurement reduces measurement cost.
The utility model use following technical scheme: a kind of directional antenna pattern measuring device, including for install to
The antenna mounting plate to be measured of observation line, antenna mounting plate to be measured are mounted on stepper motor；
It further include single-chip microcontroller, data processing unit and transmitting antenna, the data input pin of data processing unit passes through data
Line connects antenna to be measured, and the data output end of data processing unit is connected to the signal input part of single-chip microcontroller；Stepper motor connection
To the first signal output end of single-chip microcontroller；Transmitting antenna is connected to the second signal of single-chip microcontroller by the first radio-frequency signal generator
Output end；
Single-chip microcontroller generates transmitting signal for controlling the first radio-frequency signal generator, and is launched by transmitting antenna；
It is also used to control stepper motor and drives antenna mounting plate rotation to be measured, so that antenna to be measured receives transmitting antenna by different angle
The signal of sending；Be also used to receive data processing unit issue treated receive signal, and according to treated receive believe
Number calculate the directional diagram for generating antenna to be measured.
Further, data processing unit includes the second radio-frequency signal generator, the signal of the second radio-frequency signal generator
Input terminal is connected to single-chip microcontroller, and signal output end is connected to the first signal input part of frequency mixer, and the second signal of frequency mixer is defeated
Entering end to connect with antenna to be measured, the signal output end of frequency mixer is connected to the signal input part of logarithmic detector by filter,
The signal output end of number wave detector is connected to single-chip microcomputer signal input terminal；
The signal input part of second radio-frequency signal generator is connected to the third signal output end of single-chip microcontroller.
Further, transmitting antenna and the first radio-frequency signal generator are installed on transmitting antenna mounting plate.
Further, single-chip microcontroller, logarithmic detector, filter, frequency mixer, the second radio-frequency signal generator are installed in outer
In shell, display screen is also equipped on shell, screen data is connected to the fourth signal output end of single-chip microcontroller, and display screen is for showing
Show the directional diagram of antenna to be measured.
Further, logarithmic detector is made of AD8317 chip and its peripheral circuit；
1st pin of AD8317 chip meets capacitor C23, and the other end of capacitor C23 connects detection input terminal P4 and resistance respectively
R7, resistance R7 other end ground connection；
8th pin of AD8317 chip connects series capacitance C22 ground connection；
2nd pin of AD8317 chip is directly grounded；
3rd pin serial connection capacitor C26 of AD8317 chip is grounded；
Series resistance R11 between 4th pin of AD8317 chip and the 5th pin；
Another termination detection output end P5 of 5th pin connecting resistance R9 of AD8317 chip, resistance R9；
6th pin serial connection resistance R18 of AD8317 chip is grounded；
7th pin of AD8317 chip meets power supply+5V, while shunt capacitance C24, C25 are grounded.
Further, frequency mixer is made of ADL5801 chip and its peripheral circuit；
ADL5801 chip the 1st, 2,5,6,8,12,14,17,19,23 pins are grounded；
ADL5801 chip the 7th, 9,13,18,24 pins meet power supply+5V；
ADL5801 chip the 3rd, 4 pins be local oscillator input channel, pass through capacitor C10 and C11 AC coupled, T1 mono-
A 1:1 balun, for being connect with the signal output end of second radio-frequency signal generator (12)；
ADL5801 chip the 10th, 11 pins be connected, and shunt capacitance C14, C15, C16 and C17 be grounded；
ADL5801 chip the 15th, 16 pins connect radio frequency input channel, pass through capacitor C12 and C13 AC coupled, T2
It is a 1:1 balun, for being connect with the antenna to be measured；
ADL5801 chip the 20th, 21 pins connection mixing output channel, by resistance R3 and R2 DC current couple,
T3 is a 4:1 intermediate-frequency transformer, and central shaft heads series resistance R1 meets+5V, and capacitor C8, C9 are filter capacitor；
Further, filter is composed in series using the crystal filter of seven rank low-pass filters and model 10M15A,
Series inductance L5 between seven rank low-pass filters and crystal filter；
Seven rank low-pass filters are connected by three L-type circuits, three L-type circuits specifically:
One L-type circuit is formed by inductance L1 and capacitor C18；
One L-type circuit is formed by inductance L2 and capacitor C19；
One L-type circuit is formed by inductance L3 and capacitor C20；
The connection of 1st pin of inductance L5 and crystal filter；
3rd pin of crystal filter is intermediate frequency output；
2nd pin of crystal filter is grounded.
Further, the first radio-frequency signal generator and the second radio-frequency signal generator by ADF5355 chip and its outside
Enclose circuit composition；
ADF5355 chip the 1st, 2,3 pins be separately connected row needle P1, P2, P3, draw for the control of radio-frequency signal generator
Foot CLK, DATA, LE；
4th pin serial connection resistance R5 of ADF5355 chip meets 3.3V, is connected with the 5th pin；
The 5th pins in parallel capacitor C11, C15 of ADF5355 chip is grounded；
The 6th pins in parallel capacitor C18, C25 of ADF5355 chip is grounded；
7th pin of ADF5355 chip is connected with the 20th pin, and series capacitance C17 ground connection, series resistance R3 connect capacitor
C16, shunt capacitance C14 are grounded with the R6 that connects；
The pin of the 8th, 9,13,15,18,21 and 31 of ADF5355 chip is grounded；
10th pin of ADF5355 chip meets 3.3V, and shunt capacitance C32, C35 are grounded；
11st pin serial connection capacitor C43 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA+；
12nd pin serial connection capacitor C44 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA-；
Inductance L1, L2, the indirect 3.3V of inductance L1, L2, electricity in parallel are connected between 11st and 12 pins of ADF5355 chip
Hold C39, C40, C41, C42 ground connection；
14th pin serial connection capacitor C33 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTB；
The 16th pins in parallel capacitor C31, C29 of ADF5355 chip is grounded；
The 17th of ADF5355 chip is connected with 19 pins and meets+5V, shunt capacitance C19, C20, C21, C22 ground connection；
22nd pin serial connection resistance R4 of ADF5355 chip is grounded；
The 23rd of ADF5355 chip is connected with 24 pins and parallel connection C9, C10, C12, C13 are grounded；
25th pin serial connection capacitor C8 of ADF5355 chip is grounded；
The 26th of ADF5355 chip is connected with 27 pins and meets+3.3V, shunt capacitance C5, C6 ground connection；
28th pin of ADF5355 chip connects capacitor C1, C2, and the 5th pin phase with radio frequency connector SMA_REFINB
Even；
ADF5355 chip pin 28 meets capacitor C3, C4 and is connected with radio frequency connector SMA_REFINB pin 5, wherein capacitor
The indirect resistance R1 of C1, C2 are connected between capacitor C3, C4；
30th pin serial connection resistance R2 of ADF5355 chip, Light-emitting diode LED ground connection；
32nd pin serial connection capacitor C7 of ADF5355 chip is grounded；
The external oscillating circuit of ADF5355 chip is provided by 25MHz crystal oscillator U4；
The 2nd pin of U4 is grounded；
The 3rd pin of U4 connects the 5th pin of SAM_REFINA；
The 4th pin of U4 connects inductance L3 and meets 3.3V, shunt capacitance C45, C46 ground connection；
The supply voltage of ADF5355 chip is 5V, 3.3V, converts electricity by two panels voltage-stablizer LT1763 chip U2, U3 respectively
Pressure provides；
The 5th and 8 pins of U2, U3 meet power supply VCC, shunt capacitance C26, C27, C30, C34；
U2, U3 the 3rd, 6,7 pins ground connection；
The 1st pin output 5V of U2, shunt capacitance C23, C24 ground connection；
The 1st and 2 pin serial connection resistance R7 of U2；
2nd and 4 pin serial connection capacitor C28 of U2 pin；
The 2nd pin serial connection resistance R8 of U2 is grounded；
The 1st pin output 3.3V of U3, shunt capacitance C36, C37 ground connection；
The 1st and 2 pin serial connection resistance R9 of U3；
The 2nd and 4 pin serial connection capacitor C38 of U3；
The 2nd pin serial connection resistance R10 of U3 is grounded.
The beneficial effects of the utility model are: may be implemented by signal transmitter unit and signal receiving unit to signal
Capture reduce the complexity of whole system by the way that multiple element is concentrated on interior of shell, be entirely by chip microcontroller
The control of system can continuously measure the directionality of antenna, reduce measurement difficulty and measurement cost, do not need professional survey
Amount personnel can realize the measurement to antenna directivity.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the principles of the present invention block diagram；
Fig. 3 is the circuit diagram of logarithmic detector in the utility model embodiment；
Fig. 4 is the circuit diagram of frequency mixer in the utility model embodiment；
Fig. 5 is the circuit diagram of filter in the utility model embodiment；
Fig. 6 is the circuit of the first radio-frequency signal generator and the second radio-frequency signal generator in the utility model embodiment
Schematic diagram；
Fig. 7 is the integrated circuit schematic diagram of frequency mixer, filter and logarithmic detector in the utility model embodiment.
Wherein: 1. antenna mounting plates to be measured；2. antenna to be measured；3. transmitting antenna；4. transmitting antenna mounting plate；5. shell；
6. display screen；7. stepper motor；8. single-chip microcontroller；9. logarithmic detector；10. filter；11. frequency mixer；12. the second radio frequency is believed
Number generator；13. the first radio-frequency signal generator.
[specific embodiment]
The utility model is described in detail with reference to the accompanying drawings and detailed description.
The utility model discloses a kind of directional antenna pattern measuring devices, as depicted in figs. 1 and 2, including for pacifying
The antenna mounting plate 1 to be measured of antenna 2 to be measured is filled, antenna mounting plate 1 is chosen as common plate, it is only necessary to meet antenna to be measured
Just, antenna mounting plate 1 to be measured is mounted on stepper motor 7 for 2 installation.
The device further includes single-chip microcontroller 8, data processing unit and transmitting antenna 3, the data input pin of data processing unit
Antenna 2 to be measured is connected by data line, the data output end of data processing unit is connected to the signal input part of single-chip microcontroller 8；Step
The first signal output end of the single-chip microcontroller 8 is connected into motor 7；Transmitting antenna 3 is connected by the first radio-frequency signal generator 13
It is connected to the second signal output end of single-chip microcontroller 8.
Single-chip microcontroller 8 generates transmitting signal for controlling the first radio-frequency signal generator 13, and is emitted by transmitting antenna 3
It goes out；Being also used to control the stepper motor 7 drives antenna mounting plate 1 to be measured to rotate, so that antenna to be measured 2 passes through different angle
Receive the signal that transmitting antenna 3 issues；It is also used to receive data processing unit and issues that treated receives signal, and according to place
The signal that receives after reason calculates the directional diagram for generating antenna 2 to be measured.
Antenna 2 to be measured is connected to the data input pin of data processing unit, the data of data processing unit by data line
Output end is connected to the signal input part of single-chip microcontroller 8.Stepper motor 7 is connected to the first signal output end of single-chip microcontroller 8.To observation
Line 2 is used to receive the signal of the transmission of transmitting antenna 3 and is input to the first rf inputs of frequency mixer 11.Stepper motor 7 is used for
Antenna 2 to be measured is driven to rotate, so as to the signal power to obtain different directions.
Data processing unit includes the second radio-frequency signal generator 12, and the second radio-frequency signal generator 12 is for generating frequency
Lower than the sine wave signal of the 10.7MHz of radio-frequency signal generator 1, and it is input to the local oscillator input terminal of frequency mixer 11.Second penetrates
The signal input part of frequency signal generator 12 is connected to single-chip microcontroller 8, and the first signal that signal output end is connected to frequency mixer 11 is defeated
Enter end, the second signal input terminal of frequency mixer 11 is connect with antenna 2 to be measured, and the signal output end of frequency mixer 11 passes through filter
10 are connected to the signal input part of logarithmic detector 9, and the signal output end of number wave detector 9 is connected to 8 signal input part of single-chip microcontroller；
The signal input part of second radio-frequency signal generator 12 is connected to the third signal output end of single-chip microcontroller 8.
Filter 10 is used to filter out the signal that centre frequency is 10.7MHz, is input to logarithmic detector 9, single-chip microcontroller 8 is used for
The frequency for controlling frequency 58MHz~13.6GHz range of two panels radio-frequency signal generator is adjusted, and single-chip microcontroller 8 is also used to logarithm inspection
The acquisition of 9 output terminals As of wave device/D signal, and the revolving speed of control stepper motor 7, the directional antenna pattern of display screen 6 are shown
Show, single-chip microcontroller model STM32F429 single-chip microcontroller, the rate-adaptive pacemaker control of data processing, DDS is completed as master controller.
Logarithmic detector 9 is used for the power detection of signal after frequency mixer
Single-chip microcontroller 8, logarithmic detector 9, filter 10, frequency mixer 11, the second radio-frequency signal generator 12 are installed in outer
In shell 5, display screen 6, the fourth signal output end of 6 data connection of display screen to single-chip microcontroller 8, display screen are also equipped on shell 5
6 for showing the directional diagram of antenna 2 to be measured.Shell 5 is made of the material of maskable signal, is equivalent to frequency mixer 11, filter
Wave device 10 and logarithmic detector 9 etc. have added shielding case, and effect is exactly the influence and prevention for shielding external electromagnetic wave to internal circuit
The electromagnetic wave outside radiation that inside generates, makes system have high sensitivity, and enhancing anti-electromagnetic interference capability is strong.
The measuring device of the utility model further includes transmitting antenna 3, and transmitting antenna 3 passes through the first radio-frequency signal generator 13
It is connected to the second signal output end of single-chip microcontroller 8.Transmitting antenna 3 and the first radio-frequency signal generator 13 are installed in transmitting day
On line mounting plate 4, the fixation of transmitting antenna may be implemented by transmitting antenna mounting plate 4, in addition to being convenient for measuring, make to emit
Antenna 3 and antenna to be measured 2 are in same level.First radio-frequency signal generator 13 for generate frequency 58MHz~
The sine wave signal of 13.6GHz range, and it is input to transmitting antenna 3.
Single-chip microcontroller 8 generates transmitting signal for controlling the first radio-frequency signal generator 13, and is emitted by transmitting antenna 3
It goes out；Being also used to control stepper motor 7 drives antenna mounting plate 1 to be measured to rotate, so that antenna to be measured 2 is connect by different angle
Receive the signal that transmitting antenna 3 issues；It is also used to receive data processing unit and issues that treated receives signal, and according to processing
The signal that receives afterwards calculates the directional diagram for generating antenna 2 to be measured.Then single-chip microcontroller 8 is for controlling two panels radio-frequency signal generating circuit
Radiofrequency signal output and stepper motor revolving speed, the drafting of display figure.Single-chip microcontroller 8 occurs for controlling two radiofrequency signals
Device generates the revolving speed that radiofrequency signal and local oscillation signal are input to frequency mixer 11 and stepper motor 7, signal processing and display screen
Display.
In the present embodiment, as shown in figure 3, logarithmic detector 9 is made of AD8317 chip and its peripheral circuit.AD8317
1st pin of chip meets capacitor C23, and the other end of capacitor C23 meets detection input terminal P4 and resistance R7 respectively, and resistance R7 is another
End ground connection；
8th pin of AD8317 chip connects series capacitance C22 ground connection；
2nd pin of AD8317 chip is directly grounded；
3rd pin serial connection capacitor C26 of AD8317 chip is grounded；
Series resistance R11 between 4th pin of AD8317 chip and the 5th pin；
Another termination detection output end P5 of 5th pin connecting resistance R9 of AD8317 chip, resistance R9；
6th pin serial connection resistance R18 of AD8317 chip is grounded；
7th pin of AD8317 chip meets power supply+5V, while shunt capacitance C24, C25 are grounded.
The logarithmic detector 9 of the present embodiment uses AD8317 integrated chip, this chip has the following advantages that the broadband AD8317
It is wide: 1MHz to 10GHz, high-precision: ± 1.0dB, dynamic range: 50dB (8GHz), temperature stability: ± 0.5dB, low noise sounding
Amount/controller exports VOUT, pulse response time: 8ns/10 ns decline/rising, small size, 2mm × 3mm LFCSP encapsulation,
Power supply power supply: the advantages that 3.0V to 5.5V (22 mA).
As shown in figure 4, frequency mixer 11 is made of ADL5801 chip and its peripheral circuit in the present embodiment；
ADL5801 chip the 1st, 2,5,6,8,12,14,17,19,23 pins are grounded；
ADL5801 chip the 7th, 9,13,18,24 pins meet power supply+5V；
ADL5801 chip the 4th, 5 pins be local oscillator input channel, pass through capacitor C10 and C11 AC coupled, T1 mono-
A 1:1 balun, for being connect with the signal output end of second radio-frequency signal generator 12；
ADL5801 chip the 10th, 11 pins be connected, and shunt capacitance C14, C15, C16 and C17 be grounded；
ADL5801 chip the 15th, 16 pins connect radio frequency input channel, pass through capacitor C12 and C13 AC coupled, T2
It is a 1:1 balun, for being connect with the antenna 2 to be measured；
ADL5801 chip the 20th, 21 pins connection mixing output channel, by resistance R3 and R2 DC current couple,
T3 is a 4:1 intermediate-frequency transformer, and central shaft heads series resistance R1 meets+5V, and capacitor C8, C9 are filter capacitor.
The frequency mixer of the present embodiment linearly moves circuit, the received radiofrequency signal of antenna 2 to be measured, this implementation as frequency spectrum
The frequency mixer 11 of example is mixed chip using ADL5801, this chip has the following advantages that mixing chip broadband channel up/down frequency conversion
Device, power conversion gain: 1.5dB, broadband RF, local oscillator and the port IF, sideband noise index: 10dB, outstanding obstruction single-side belt
Noise figure inputs IP3:27dBm, inputs P1dB:12dBm, local oscillator driving: 0dBm (representative value), the local oscillator of RF output end are let out
Leakage: -40dBm, single supply power supply: 5V.
As shown in figure 5, filter 10 is using the filter of the crystal of seven rank low-pass filters and model 10M15A in the present embodiment
Wave device is composed in series, series inductance L5 between seven rank low-pass filters and crystal filter；
Seven rank low-pass filters are connected by three L-type circuits, three L-type circuits specifically:
One L-type circuit is formed by inductance L1 and capacitor C18；
One L-type circuit is formed by inductance L2 and capacitor C19；
One L-type circuit is formed by inductance L3 and capacitor C20；
The connection of 1st pin of inductance L5 and crystal filter；
3rd pin of crystal filter is intermediate frequency output；
2nd pin of crystal filter is grounded.
The advantages of filter 10 is connected using seven rank low-pass filters and crystal filter: inductance is all made of patch coiling electricity
Sense, makes high-frequency be able to maintain stable inductance and quite high Q value, using seven rank low-pass filters and model 10M15A
Crystal filter be composed in series, to improve the frequency selectivity of system, avoid crystal filter in high band performance difference
Disadvantage, the two series connection make the pure reduction noise of frequency spectrum.
As shown in fig. 6, in the present embodiment the first radio-frequency signal generator 13 and the second radio-frequency signal generator 12 by
ADF5355 chip and its peripheral circuit form；
ADF5355 chip the 1st, 2,3 pins be separately connected row needle P1, P2, P3, draw for the control of radio-frequency signal generator
Foot CLK, DATA, LE；
4th pin serial connection resistance R5 of ADF5355 chip meets 3.3V, is connected with the 5th pin；
The 5th pins in parallel capacitor C11, C15 of ADF5355 chip is grounded；
The 6th pins in parallel capacitor C18, C25 of ADF5355 chip is grounded；
7th pin of ADF5355 chip is connected with the 20th pin, and series capacitance C17 ground connection, series resistance R3 connect capacitor
C16, shunt capacitance C14 are grounded with the R6 that connects；
The pin of the 8th, 9,13,15,18,21 and 31 of ADF5355 chip is grounded；
10th pin of ADF5355 chip meets 3.3V, and shunt capacitance C32, C35 are grounded；
11st pin serial connection capacitor C43 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA+；
12nd pin serial connection capacitor C44 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA-；
Inductance L1, L2, the indirect 3.3V of inductance L1, L2, electricity in parallel are connected between 11st and 12 pins of ADF5355 chip
Hold C39, C40, C41, C42 ground connection；
14th pin serial connection capacitor C33 of ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTB；
The 16th pins in parallel capacitor C31, C29 of ADF5355 chip is grounded；
The 17th of ADF5355 chip is connected with 19 pins and meets+5V, shunt capacitance C19, C20, C21, C22 ground connection, leads to
Power supply ripple can be filtered out by crossing capacitor C19, C20, C21, C22 in parallel, reduce power supply additive noise, send out the first radiofrequency signal
The output signal-noise ratio of raw device 13 and second signal generator 12 increases.
22nd pin serial connection resistance R4 of ADF5355 chip is grounded；
The 23rd of ADF5355 chip is connected with 24 pins and parallel connection C9, C10, C12, C13 are grounded；
25th pin serial connection capacitor C8 of ADF5355 chip is grounded；
The 26th of ADF5355 chip is connected with 27 pins and meets+3.3V, shunt capacitance C5, C6 ground connection；Pass through parallel connection
Capacitor C5 and C6 can filter out power supply ripple, reduce power supply additive noise, make the first radio-frequency signal generator 13 and second signal
The output signal-noise ratio of generator 12 increases.
28th pin of ADF5355 chip connects capacitor C1, C2, and the 5th pin phase with radio frequency connector SMA_REFINB
Even；
ADF5355 chip pin 28 meets capacitor C3, C4 and is connected with radio frequency connector SMA_REFINB pin 5, wherein capacitor
The indirect resistance R1 of C1, C2 are connected between capacitor C3, C4；
30th pin serial connection resistance R2 of ADF5355 chip, Light-emitting diode LED ground connection；Acting on for observing chip is
No normal work, works if normal, and light emitting diode is always on；
32nd pin serial connection capacitor C7 of ADF5355 chip is grounded；
The external oscillating circuit of ADF5355 chip is provided by 25MHz crystal oscillator U4；
The 2nd pin of U4 is grounded；
The 3rd pin of U4 connects the 5th pin of SAM_REFINA；
The 4th pin of U4 connects inductance L3 and meets 3.3V, shunt capacitance C45, C46 ground connection；
The supply voltage of ADF5355 chip is 5V, 3.3V, converts electricity by two panels voltage-stablizer LT1763 chip U2, U3 respectively
Pressure provides；
The 5th and 8 pins of U2, U3 meet power supply VCC, shunt capacitance C26, C27, C30, C34；For filtering out input power
Ripple reduces power supply additive noise；
U2, U3 the 3rd, 6,7 pins ground connection；
The 1st pin output 5V of U2, shunt capacitance C23, C24 ground connection；
The 1st and 2 pin serial connection resistance R7 of U2；
2nd and 4 pin serial connection capacitor C28 of U2 pin；
The 2nd pin serial connection resistance R8 of U2 is grounded；
The 1st pin output 3.3V of U3, shunt capacitance C36, C37 ground connection；
The 1st and 2 pin serial connection resistance R9 of U3；
The 2nd and 4 pin serial connection capacitor C38 of U3；
The 2nd pin serial connection resistance R10 of U3 is grounded；
Selected power regulator has the following advantages that LT1763 voltage-stablizer has low output noise.Adding one
In the case where external 0.01 μ F feed-through capacitor, output noise will drop to 20 μ VRMS (in the bandwidth of a 10Hz to 100kHz
Within).LT1763 voltage-stablizer can be realized in output capacitor of the use down to 3.3 μ F to be stablized.Internal protection circuitry includes anti-
To battery protection, current limit, heat limitation and reverse-current protection.These devices can provide 1.5V, 1.8V, 2.5V, 3V, 3.3V
With the fixation output voltage of 5V, and can be used as it is a tool one 1.22V reference voltage adjustable type device.Therefore power supply is using time core
Power supply power supply chip used by remaining ADF5355 chip data handbook reference circuit is distinguished in piece power supply.
As shown in fig. 7, for the circuit theory for connecting together frequency mixer, filter and logarithmic detector in the present embodiment
Figure.Be that the first radio-frequency signal generator 13 and the second radio-frequency signal generator 12 are powered by outside+9V power supply, by it is external+
The mixting circuit power supply of 5V, for logarithmic detector 9, frequency mixer, single-chip microcontroller 8 and monitor power supply, mixting circuit power supply and power supply
Power indicator circuit is installed, which includes capacitor C21, connects capacitor C21 one end+5V, the other end in bus
Ground connection, power supply+5V series inductance L6, resistance R6 light emitting diode D1, when making+5V power supply power supply, polishing diode D1 is always on, with
Display circuit state.+ 5V mixting circuit power sources in parallel capacitor C2, C3, C4, C5, C6, C7, C1 ground connection can play filtering and make
With filtering out the ripple in power supply.
The measuring device of the utility model applies also for college teaching, is added by the test to different frequency range antenna performance
Deep student recognizes the perception of directional antenna pattern, while student can design various antennas with the system and carry out antenna performance survey
Examination.It can be directed to experimental teaching, the test pattern of single frequency point is upgraded into multifrequency point test pattern, to promote the whole effect of test
Rate, while including the automatic software for drawing of directional antenna pattern, it is directly displayed on liquid crystal interface, measures the spy of various antennas
Property, realize the comprehensive automation of test process.Specifically include that auto-control, the antenna rf access to be measured of test equipment
The automation, data acquisition and the automation of report generation of (channel) switching increase.
Meanwhile the test method of the alternative vector network analyzer black box formula of the utility model, student is in test
The test philosophy and circuit for understanding antenna simultaneously are constituted, and constituent system components are adjustable, change the parameter of building block, observation is not
Same experimental phenomena, therefore may be directly applied to experimental teaching.
The utility model discloses a kind of high directional antenna pattern automatic measuring systems of simple economic cost performance, can
Realize the directional antenna pattern inspection that the directional antenna pattern that frequency is 58MHz~13.6GHz measures, and can be used in factory
It surveys, it can also be used to which in college experiment teaching, the utility model structure is simple, at low cost, and reliable and stable work.
Claims (8)
1. a kind of directional antenna pattern measuring device, which is characterized in that including the antenna to be measured for installing antenna to be measured (2)
Mounting plate (1), the antenna mounting plate (1) to be measured are mounted on stepper motor (7)；
It further include single-chip microcontroller (8), data processing unit and transmitting antenna (3), the data input pin of the data processing unit is logical
It crosses data line and connects antenna (2) to be measured, the data output end of the data processing unit is connected to the signal input of single-chip microcontroller (8)
End；The stepper motor (7) is connected to the first signal output end of the single-chip microcontroller (8)；The transmitting antenna (3) passes through first
Radio-frequency signal generator (13) is connected to the second signal output end of the single-chip microcontroller (8)；
The single-chip microcontroller (8) generates transmitting signal for controlling first radio-frequency signal generator (13), and passes through the hair
Antenna (3) is penetrated to launch；It is also used to control the stepper motor (7) and drives antenna mounting plate (1) rotation to be measured, so that
The antenna to be measured (2) receives the signal of the transmitting antenna (3) sending by different angle；It is also used to receive at the data
It manages unit and issues that treated and receive signal, and treated receives signal and calculate and generate the antenna to be measured according to described
(2) directional diagram.
2. a kind of directional antenna pattern measuring device as described in claim 1, which is characterized in that the data processing unit
Including the second radio-frequency signal generator (12), the signal input part of second radio-frequency signal generator (12) is connected to the list
Piece machine (8), signal output end are connected to the first signal input part of frequency mixer (11), and the second signal of the frequency mixer (11) is defeated
Enter end to connect with the antenna (2) to be measured, the signal output end of the frequency mixer (11) is connected to logarithm by filter (10)
The signal input part of wave detector (9), the signal output end of several wave detectors (9) are connected to the input of the single-chip microcontroller (8) signal
End；
The signal input part of second radio-frequency signal generator (12) is connected to the third signal output of the single-chip microcontroller (8)
End.
3. a kind of directional antenna pattern measuring device as claimed in claim 1 or 2, which is characterized in that the transmitting antenna
(3) it is installed on transmitting antenna mounting plate (4) with the first radio-frequency signal generator (13).
4. a kind of directional antenna pattern measuring device as claimed in claim 1 or 2, which is characterized in that the single-chip microcontroller
(8), logarithmic detector (9), filter (10), frequency mixer (11), the second radio-frequency signal generator (12) are installed in shell (5)
It is interior, it is also equipped with display screen (6) on the shell (5), display screen (6) data connection to the 4th of the single-chip microcontroller (8)
Signal output end, the display screen (6) are used to show the directional diagram of the antenna to be measured (2).
5. a kind of directional antenna pattern measuring device as claimed in claim 4, which is characterized in that the logarithmic detector
(9) it is made of AD8317 chip and its peripheral circuit；
1st pin of the AD8317 chip meets capacitor C23, the other end of the capacitor C23 connect respectively detection input terminal P4 and
Resistance R7, the resistance R7 other end ground connection；
8th pin of the AD8317 chip connects series capacitance C22 ground connection；
2nd pin of the AD8317 chip is directly grounded；
3rd pin serial connection capacitor C26 of the AD8317 chip is grounded；
Series resistance R11 between the 4th pin and the 5th pin of the AD8317 chip；
5th pin connecting resistance R9, another termination detection output end P5 of resistance R9 of the AD8317 chip；
6th pin serial connection resistance R18 of the AD8317 chip is grounded；
7th pin of the AD8317 chip meets power supply+5V, while shunt capacitance C24, C25 are grounded.
6. a kind of directional antenna pattern measuring device as claimed in claim 5, which is characterized in that the frequency mixer (11) by
ADL5801 chip and its peripheral circuit form；
The ADL5801 chip the 1st, 2,5,6,8,12,14,17,19,23 pins are grounded；
The ADL5801 chip the 7th, 9,13,18,24 pins meet power supply+5V；
The ADL5801 chip the 3rd, 4 pins be local oscillator input channel, pass through capacitor C10 and C11 AC coupled, T1 mono-
A 1:1 balun, for being connect with the signal output end of second radio-frequency signal generator (12)；
The ADL5801 chip the 10th, 11 pins be connected, and shunt capacitance C14, C15, C16 and C17 be grounded；
The ADL5801 chip the 15th, 16 pins connect radio frequency input channel, pass through capacitor C12 and C13 AC coupled, T2
It is a 1:1 balun, for being connect with the antenna (2) to be measured；
The ADL5801 chip the 20th, 21 pins connection mixing output channel, by resistance R3 and R2 DC current couple,
T3 is a 4:1 intermediate-frequency transformer, and central shaft heads series resistance R1 meets+5V, and capacitor C8, C9 are filter capacitor.
7. a kind of directional antenna pattern measuring device as claimed in claim 6, which is characterized in that the filter (10) is adopted
It is composed in series with the crystal filter of seven rank low-pass filters and model 10M15A, the seven ranks low-pass filter and crystal filter
Series inductance L5 between wave device；
The seven ranks low-pass filter is connected by three L-type circuits, three L-type circuits specifically:
One L-type circuit is formed by inductance L1 and capacitor C18；
One L-type circuit is formed by inductance L2 and capacitor C19；
One L-type circuit is formed by inductance L3 and capacitor C20；
The connection of 1st pin of the inductance L5 and crystal filter；
3rd pin of the crystal filter is intermediate frequency output；
2nd pin of the crystal filter is grounded.
8. a kind of directional antenna pattern measuring device as claimed in claim 3, which is characterized in that first radiofrequency signal
Generator (13) and the second radio-frequency signal generator (12) are made of ADF5355 chip and its peripheral circuit；
The ADF5355 chip the 1st, 2,3 pins be separately connected row needle P1, P2, P3, draw for the control of radio-frequency signal generator
Foot CLK, DATA, LE；
4th pin serial connection resistance R5 of the ADF5355 chip meets 3.3V, is connected with the 5th pin；
The 5th pins in parallel capacitor C11, C15 of the ADF5355 chip is grounded；
The 6th pins in parallel capacitor C18, C25 of the ADF5355 chip is grounded；
7th pin of the ADF5355 chip is connected with the 20th pin, and series capacitance C17 ground connection, series resistance R3 connect capacitor
C16, shunt capacitance C14 are grounded with the R6 that connects；
The pin of the 8th, 9,13,15,18,21 and 31 of the ADF5355 chip is grounded；
10th pin of the ADF5355 chip meets 3.3V, and shunt capacitance C32, C35 are grounded；
11st pin serial connection capacitor C43 of the ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA+；
12nd pin serial connection capacitor C44 of the ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTA-；
Inductance L1, L2, the indirect 3.3V of described inductance L1, L2, simultaneously are connected between 11st and 12 pins of the ADF5355 chip
Join capacitor C39, C40, C41, C42 ground connection；
14th pin serial connection capacitor C33 of the ADF5355 chip connects the 5th pin of RF output end head SMA_RFOUTB；
The 16th pins in parallel capacitor C31, C29 of the ADF5355 chip is grounded；
The 17th of the ADF5355 chip is connected with 19 pins and meets+5V, shunt capacitance C19, C20, C21, C22 ground connection；
22nd pin serial connection resistance R4 of the ADF5355 chip is grounded；
The 23rd of the ADF5355 chip is connected with 24 pins and parallel connection C9, C10, C12, C13 are grounded；
25th pin serial connection capacitor C8 of the ADF5355 chip is grounded；
The 26th of the ADF5355 chip is connected with 27 pins and meets+3.3V, shunt capacitance C5, C6 ground connection；
28th pin of the ADF5355 chip connects capacitor C1, C2, and the 5th pin phase with radio frequency connector SMA_REFINB
Even；
The ADF5355 chip pin 28 meets capacitor C3, C4 and is connected with radio frequency connector SMA_REFINB pin 5, wherein capacitor
The indirect resistance R1 of C1, C2 are connected between capacitor C3, C4；
30th pin serial connection resistance R2 of the ADF5355 chip, Light-emitting diode LED ground connection；
32nd pin serial connection capacitor C7 of the ADF5355 chip is grounded；
The external oscillating circuit of the ADF5355 chip is provided by 25MHz crystal oscillator U4；
The 2nd pin of the U4 is grounded；
The 3rd pin of the U4 connects the 5th pin of SAM_REFINA；
The 4th pin of the U4 connects inductance L3 and meets 3.3V, shunt capacitance C45, C46 ground connection；
The supply voltage of the ADF5355 chip is 5V, 3.3V, converts electricity by two panels voltage-stablizer LT1763 chip U2, U3 respectively
Pressure provides；
The 5th and 8 pins of described U2, U3 meet power supply VCC, shunt capacitance C26, C27, C30, C34；
Described U2, U3 the 3rd, 6,7 pins ground connection；
The 1st pin output 5V of the U2, shunt capacitance C23, C24 ground connection；
The 1st and 2 pin serial connection resistance R7 of the U2；
2nd and 4 pin serial connection capacitor C28 of the U2 pin；
The 2nd pin serial connection resistance R8 of the U2 is grounded；
The 1st pin output 3.3V of the U3, shunt capacitance C36, C37 ground connection；
The 1st and 2 pin serial connection resistance R9 of the U3；
The 2nd and 4 pin serial connection capacitor C38 of the U3；
The 2nd pin serial connection resistance R10 of the U3 is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822050029.7U CN209264838U (en) | 2018-12-07 | 2018-12-07 | A kind of directional antenna pattern measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822050029.7U CN209264838U (en) | 2018-12-07 | 2018-12-07 | A kind of directional antenna pattern measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726883A (en) * | 2019-11-21 | 2020-01-24 | 中电科仪器仪表有限公司 | Antenna test turntable dynamic control method for antenna directional pattern test |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726883A (en) * | 2019-11-21 | 2020-01-24 | 中电科仪器仪表有限公司 | Antenna test turntable dynamic control method for antenna directional pattern test |
| CN110726883B (en) * | 2019-11-21 | 2021-09-10 | 中电科思仪科技股份有限公司 | Antenna test turntable dynamic control method for antenna directional pattern test |
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