CN106771673B - A kind of GPS antenna directionality test method and system - Google Patents
A kind of GPS antenna directionality test method and system Download PDFInfo
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- CN106771673B CN106771673B CN201710131146.3A CN201710131146A CN106771673B CN 106771673 B CN106771673 B CN 106771673B CN 201710131146 A CN201710131146 A CN 201710131146A CN 106771673 B CN106771673 B CN 106771673B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
Abstract
The invention discloses a kind of GPS antenna directionality test method and systems, this method comprises: by building antenna directivity test platform in advance, since the antenna directivity test platform includes: the turntable for placing GPS antenna to be measured, the slidably fixed segmental support for testing auxiliary antenna, the cooperation of the turntable and segmental support is able to achieve between GPS antenna to be measured and test auxiliary antenna precise positioning at any angle, and it can really reflect that vehicle GPS antenna receives the scene of signal from top in actual use in the top of turntable since the arch is erected；Then space is divided in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains pilot to be measured, the test angle of the test coordinate and turntable of segmental support is calculated then according to pilot to be measured, thus can more reasonably obtain each test point.GPS antenna directionality can be accurately tested using the present invention.
Description
Technical field
The present invention relates to the field of test technology, in particular to a kind of GPS antenna directionality test method and system.
Background technique
Antenna is a kind of conversion equipment of the high-frequency current in atmospheric radio waves signal and circuit, the radio wave in space
Signal is transmitted to circuit by antenna；High-frequency current in circuit is transmitted in space eventually by antenna.Antenna is as empty
Between high-frequency current in radio wave signal and circuit conversion equipment, the high-frequency current signal contact in one end and circuit, separately
Radio wave signal contact in one end and free space.Antenna directivity describes antenna and freedom as a basic parameter
The relationship of electric wave in space.
The prior art is in order to test antenna directivity, usually in the horizontal plane by changing antenna to be measured and test auxiliary
The various situations of actual use are simulated in position between antenna, still, no by reflection of electromagnetic wave situation of ground and sky etc.
With influence, cause measuring accuracy that cannot meet the requirements；In addition, as shown in Figure 1, flat for the test of prior art GPS antenna directionality
The schematic diagram of platform, the position in existing test method between antenna and test auxiliary antenna to be measured are not easy to accurately adjust, example
Such as, it is not easy to accurately adjust antenna to be measured and tests the various situations that auxiliary antenna is not located at horizontal plane.
Summary of the invention
The present invention provides a kind of GPS antenna directionality test method and systems, solve prior art GPS antenna directionality
The problem of measuring accuracy cannot be met the requirements.
The present invention provides a kind of GPS antenna directionality test methods, comprising:
Antenna directivity test platform is built in advance, wherein antenna directivity test platform includes: to place GPS days to be measured
The segmental support of the turntable of line, slidably fixed test auxiliary antenna, wherein turntable is located at vertically dividing equally for segmental support both ends line
On line；
Space is divided in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains pilot to be measured；
The test angle of the test coordinate and turntable of segmental support is calculated according to pilot to be measured；
It obtains the GPS antenna to be measured under each test coordinate of segmental support and each test angle of turntable and receives test auxiliary
The signal strength of antenna transmitting；
It is determined GPS days to be measured according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
The antenna directivity of line.
Preferably, the test platform is located outside place；
It is described to build antenna directivity test platform in advance and include:
Not and on open area of the GPS antenna to be measured with the radio-frequency apparatus of frequency band, the region for choosing predetermined size is made
For test platform region；
Set up segmental support；
Turntable is set on the perpendicular bisector of segmental support both ends line；
Absorbing material is laid on the ground in test platform region.
Preferably, the GPS antenna to be measured under each test angle of each test coordinate for obtaining segmental support and turntable connects
Receiving the signal strength that test auxiliary antenna emits includes:
Test auxiliary antenna is moved to a test coordinate of segmental support by step S41；
Turntable is gone to each test angle corresponding with test coordinate by step S42；
Step S43, the signal strength of GPS antenna collecting test auxiliary antenna transmitting to be measured；
Step S41 to step S43 is repeated, until acquiring the far field width phase data of all pilots to be measured of GPS antenna to be measured；
Antenna radiation pattern is drawn according to the far field width phase data of all pilots to be measured of GPS antenna to be measured；
The test angle of the test coordinate and turntable according to strongest signal strength and corresponding segmental support determines to be measured
The antenna directivity of GPS antenna includes:
The antenna directivity of GPS antenna to be measured is determined according to antenna radiation pattern.
Preferably, the far field width phase data of all pilots to be measured according to GPS antenna to be measured draws antenna radiation pattern
Include:
Far field width phase data is transformed into time domain using the when domain-functionalities of vector network analyzer；
Carry out time domain gating processing；
By time domain gating, treated that data are transformed into frequency domain；
Antenna radiation pattern is drawn according to the data for being transformed into frequency domain.
Preferably, the distance between the turntable and segmental support are 20 times of GPS wavelength；
Time domain gate-width 5ns is set in time domain gating treatment process between 10ns.
Preferably, the method also includes:
After the far field width phase data for all pilots to be measured for obtaining GPS antenna to be measured, GPS antenna to be measured is changed to
Standard gain antenna；
Step S31 to step S33 is repeated, until the far field width number of phases of all pilots to be measured of acquisition standard gain antenna
According to；
GPS to be measured is obtained according to the far field width phase data of the far field width phase data of standard gain antenna and GPS antenna to be measured
The yield value of antenna.
Correspondingly, the present invention also provides a kind of GPS antenna directionality test macros, comprising:
Turntable, segmental support, test auxiliary antenna, test auxiliary antenna pedestal and host computer, host computer are auxiliary with test respectively
Antenna is helped to be connected with GPS antenna to be measured, turntable is located on the perpendicular bisector of segmental support both ends line；
Test auxiliary antenna pedestal is slidably fixed on segmental support, for fixed test auxiliary antenna；
Turntable turns to specified angle for fixing GPS antenna to be measured, by GPS antenna to be measured；
Host computer is used to divide space in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains
To pilot to be measured, then, bow is then obtained according to the test angle that pilot to be measured calculates the test coordinate and turntable of segmental support
GPS antenna to be measured under each test coordinate of shape frame and each test angle of turntable receives the signal of test auxiliary antenna transmitting
Then intensity determines GPS to be measured according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
The antenna directivity of antenna.
Preferably, the turntable and the segmental support are located outside place, which forbids existing and GPS days to be measured
Radio-frequency apparatus of the line with frequency band；
The material on the ground of the outdoor sports is absorbing material；
The distance between the turntable and segmental support are 20 times of GPS wavelength.
Preferably, the system also includes:
Vector network analyzer is connected with test auxiliary antenna, GPS antenna to be measured and host computer respectively, and being used for will be to be measured
The far field width phase data that GPS antenna is sent is transformed into time domain, time domain gating processing is then carried out, after then handling time domain gating
Data be transformed into frequency domain, and be sent to host computer；
The data that the host computer is specifically used for being transformed into frequency domain based on the received draw antenna radiation pattern.
Preferably, the system also includes:
Vector network analyzer, respectively with test auxiliary antenna, GPS antenna to be measured, standard gain antenna and host computer phase
Even, for the far field width phase data of GPS antenna to be measured and the transmission of standard gain antenna to be transformed into time domain, time domain choosing is then carried out
Logical processing, then by time domain gating, treated that data are transformed into frequency domain, and is sent to host computer；
The host computer is specifically used for the number for being transformed into frequency domain sent according to GPS antenna to be measured and standard gain antenna
According to obtaining the yield value of GPS antenna to be measured.
A kind of GPS antenna directionality test method and system provided by the invention are surveyed by building antenna directivity in advance
Platform is tried, since the antenna directivity test platform includes: the turntable for placing GPS antenna to be measured, slidably fixed test auxiliary
The segmental support of antenna, the cooperation of the turntable and segmental support are able to achieve any angle between GPS antenna to be measured and test auxiliary antenna
Precise positioning, and due to the arch erect in the top of turntable, can really reflect vehicle GPS antenna in actual use from top
Receive the scene of signal；Then space is divided in the probability that different directions are antenna direction according to GPS antenna to be measured, is obtained
To pilot to be measured, the test angle of the test coordinate and turntable of segmental support is calculated then according to pilot to be measured, it thus can be more
Each test point is reasonably obtained, such as to the big direction more data acquisitions of progress of possibility to improve test result precision,
And GPS antenna to be measured and test auxiliary antenna will accurately be positioned to meet the requirement of test point, it thus can essence
GPS antenna to be measured under true each test coordinate of acquisition segmental support and each test angle of turntable receives test auxiliary antenna
The signal strength of transmitting allows the present invention according to the test coordinate and turntable of strongest signal strength and corresponding segmental support
Test angle is accurately determined the antenna directivity of GPS antenna to be measured.
Further, GPS antenna directionality test method and system provided by the invention, test platform not with it is to be measured
GPS antenna on the open area of the radio-frequency apparatus of frequency band it is possible to prevente effectively from interference, in addition, also on the ground in test platform region
Face is laid with absorbing material, can reduce ground return in this way, improves measuring accuracy.
Further, GPS antenna directionality test method and system provided by the invention, give using test platform into
Row test specific steps, and according to test data draw antenna radiation pattern, in order to according to antenna radiation pattern simply and efficiently
Determine the antenna directivity of GPS antenna to be measured.
Further, GPS antenna directionality test method and system provided by the invention, using based on vector network analysis
The method of instrument time domain door setting eliminates environment transmitting, scattered signal, and acquisition is more nearly actual side after returning to frequency domain
To figure result.
Further, GPS antenna directionality test method and system provided by the invention, give specifically obtain to
The method for surveying the yield value of GPS antenna, due to that can guarantee all pilots to be measured of GPS antenna and standard gain antenna to be measured
The accuracy of far field width phase data, therefore can guarantee the accuracy of the yield value of the GPS antenna to be measured finally obtained.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention
A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is the schematic diagram of prior art GPS antenna directionality test platform；
Fig. 2 is a kind of flow chart according to GPS antenna directionality test method provided in an embodiment of the present invention；
Fig. 3 is according to a kind of flow chart provided in an embodiment of the present invention for building antenna directivity test platform method；
Fig. 4 is according to the letter provided in an embodiment of the present invention for obtaining GPS antenna to be measured and receiving test auxiliary antenna transmitting
A kind of flow chart of number intensity；
Fig. 5 is one kind according to the method provided in an embodiment of the present invention for drawing antenna radiation pattern according to far field width phase data
Flow chart；
Fig. 6 is a kind of flow chart according to the method for the yield value provided in an embodiment of the present invention for obtaining GPS antenna to be measured；
Fig. 7 is a kind of structural schematic diagram according to GPS antenna directionality test macro provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram according to antenna directivity test platform provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar parameter or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Technical solution and technical effect in order to better understand the present invention, below with reference to flow diagram to specific
Embodiment is described in detail.As shown in Fig. 2, for according to GPS antenna directionality test method provided in an embodiment of the present invention
A kind of flow chart, this method may comprise steps of:
Step S01 builds antenna directivity test platform in advance, wherein antenna directivity test platform include: place to
It surveys the turntable of GPS antenna, slidably fix the segmental support of test auxiliary antenna, wherein turntable is located at segmental support both ends line
On perpendicular bisector.
In the present embodiment, multi-angle rotation, such as turntable may be implemented in turntable, and GPS antenna to be measured is placed on rotation
On platform, segmental support is erected at the top of turntable, which can be semicircle ellipse, arc of customization etc., segmental support
On can be equipped with graduated scale etc. and with the label that determines test auxiliary antenna, it is preferable that the segmental support is semicircle, is convenient in this way
The test angle of subsequent the test coordinate and turntable that segmental support is calculated according to pilot to be measured.
In a specific embodiment, the distance between turntable and segmental support are 20 times of GPS wavelength, the wave of GPS antenna
It is about in 20cm, therefore the measuring distance about 4m or so of 20 λ can be chosen.
Step S02 divides space in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains
Pilot to be measured.
In the present embodiment, in order to improve the precision of test, more dense data is carried out to important region and are acquired, this
The accuracy of final test can be improved in sample, specifically, the big place of the probability of antenna direction is divided more spaces, in this way
The data of more points can be acquired, each space can be used as a test point.
Step S03 calculates the test angle of the test coordinate and turntable of segmental support according to pilot to be measured.
In the present embodiment, although segmental support can accurate assignment test auxiliary antenna, segmental support volume is big, no
It is convenient for moving, but can be realized by turntable and segmental support between all GPS antennas to be measured and test auxiliary antenna
Possible position grouping.For example, can change latitude by the test coordinate for changing segmental support, can change by rotating table
Longitude, each pilot to be measured correspond to one group of longitude and latitude, accordingly also correspond to the test coordinate and turntable of one group of segmental support
Test angle.
Step S04, the GPS antenna to be measured obtained under each test coordinate of segmental support and each test angle of turntable receive
Test the signal strength of auxiliary antenna transmitting.
Step S05 is determined according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
The antenna directivity of GPS antenna to be measured.
GPS antenna directionality test method and system provided in an embodiment of the present invention, due to the antenna direction built in advance
Property test platform include the turntable and the slidably segmental support of fixed test auxiliary antenna for placing GPS antenna to be measured, the turntable and
The cooperation of segmental support is able to achieve between GPS antenna to be measured and test auxiliary antenna precise positioning at any angle, and due to the bow
Shape, which is erected, can really reflect that vehicle GPS antenna receives the scene of signal from top in actual use in the top of turntable；Then root
According to GPS antenna to be measured different directions be antenna direction probability space is divided, obtain pilot to be measured, then according to
Test point calculates the test angle of the test coordinate and turntable of segmental support, thus can more reasonably obtain each test point, example
Direction such as big to possibility carries out more data acquisitions to improve test result precision, and accurately will be to GPS days to be measured
Line and test auxiliary antenna are positioned to meet the requirement of test point, and each test of segmental support thus can be accurately obtained
GPS antenna to be measured under each test angle of coordinate and turntable receives the signal strength of test auxiliary antenna transmitting, so that this
Invention can be accurately determined according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support to
Survey the antenna directivity of GPS antenna.
As shown in figure 3, for according to a kind of stream provided in an embodiment of the present invention for building antenna directivity test platform method
Cheng Tu.
In the present embodiment, the process for specifically building antenna directivity test platform is given, wherein the test platform
Be located outside place, the prior art generallys use automobile-used darkroom: the finite volume in general automobile-used darkroom can not meet 10m or more
The antenna measurement that measuring distance requires；In addition automobile-used anechoic chamber design somewhat expensive.
It is described to build antenna directivity test platform in advance and may include:
Step S31 chooses predetermined size not and on open area of the GPS antenna to be measured with the radio-frequency apparatus of frequency band
Region as test platform region.
Step S32 sets up segmental support.
Turntable is arranged on the perpendicular bisector of segmental support both ends line in step S33.
Step S34 is laid with absorbing material on the ground in test platform region.
In the present embodiment, test site is arranged: it is the rectangle of 500m × 300m that test site, which selects place planar dimension,
Open area, diameter are the horizontal one-dimensional turntable of 12m in the position away from place side 150m, while without with frequency band around place
Radio-frequency apparatus.Segmental support is set up in the venue, is positioned for assignment test auxiliary antenna.Simultaneously ground be laid with absorbing material with
Reduce ground return.
As shown in figure 4, to receive test auxiliary antenna hair according to acquisition GPS antenna to be measured provided in an embodiment of the present invention
A kind of flow chart for the signal strength penetrated.
In the present embodiment, the GPS to be measured under each test angle of each test coordinate for obtaining segmental support and turntable
Antenna receives the signal strength that test auxiliary antenna emits
Test auxiliary antenna is moved to a test coordinate of segmental support by step S41.
Turntable is gone to each test angle corresponding with test coordinate by step S42.
Step S43, the signal strength of GPS antenna collecting test auxiliary antenna transmitting to be measured.
Step S41 to step S43 is repeated, until the far field width phase data of all pilots to be measured of GPS antenna to be measured is acquired,
The far field width phase data includes signal strength information.
Step S44 draws antenna radiation pattern according to the far field width phase data of all pilots to be measured of GPS antenna to be measured.
Wherein, antenna radiation pattern is an index for measuring antenna all directions receiving and transmitting signal ability, usually with figure side
Formula is expressed as the relationship of power level and angle.
The test angle of the test coordinate and turntable according to strongest signal strength and corresponding segmental support determines to be measured
The antenna directivity of GPS antenna includes:
The antenna directivity of GPS antenna to be measured is determined according to antenna radiation pattern.
GPS antenna directionality test method and system provided by the invention are given and are tested using test platform
Specific steps, and antenna radiation pattern is drawn according to test data, it is to be measured in order to simply and efficiently be determined according to antenna radiation pattern
The antenna directivity of GPS antenna.
As shown in figure 5, for according to the side provided in an embodiment of the present invention for drawing antenna radiation pattern according to far field width phase data
A kind of flow chart of method.
In the present embodiment, the far field width phase data of all pilots to be measured according to GPS antenna to be measured draws antenna
Directional diagram can specifically include:
Far field width phase data is transformed into time domain using the when domain-functionalities of vector network analyzer by step S51.Specifically,
Inverse transformation to time domain is used by frequency domain window function.
Step S52 carries out time domain gating processing.Reflection signal is filtered, gating pulse is only retained.
Step S53, by time domain gating, treated that data are transformed into frequency domain.
Step S54 draws antenna radiation pattern according to the data for being transformed into frequency domain.
In a specific embodiment, test the distance between auxiliary antenna and GPS antenna to be measured is about 4m, is surveyed according to 4m
Examination distance can reach the GPS antenna time to the signal of test auxiliary antenna and estimate: t=d/c.Electromagnetic transmission rate c=3
×108M/s direct wave transmission time is 13ns, and the time domain door upper limit is according to nearest back wave and direct wave delay inequality half
It is configured.For roof secondary reflection signal transmission time 10ns, turntable plane is about to top antenna signal transmission time
10ns.Therefore can get higher measuring accuracy between setting 5~10ns of gate-width, therefore, when between turntable and segmental support away from
When from 20 times for GPS wavelength, time domain gate-width 5ns can be set between 10ns in time domain gating treatment process.
GPS antenna directionality test method and system provided by the invention, using based on vector network analyzer time domain door
The method of setting eliminates environment transmitting, scattered signal, and acquisition is more nearly actual directional diagram knot after returning to frequency domain
Fruit.
As shown in fig. 6, for according to one kind of the method for the yield value provided in an embodiment of the present invention for obtaining GPS antenna to be measured
Flow chart.
In the present embodiment, in order to test the yield value of GPS to be measured, the method also includes:
Step S61, after the far field width phase data for all pilots to be measured for obtaining GPS antenna to be measured, by GPS days to be measured
Line is changed to standard gain antenna；
Step S31 to step S33 is repeated, until the far field width number of phases of all pilots to be measured of acquisition standard gain antenna
According to；
Step S62 is obtained according to the far field width phase data of the far field width phase data of standard gain antenna and GPS antenna to be measured
The yield value of GPS antenna to be measured.
Specifically, when testing GPS antenna yield value to be measured, assume initially that reference antenna (standard gain antenna) is pressed
It is tested, test result will be handled twice according to above-mentioned steps, can get the yield value of antenna to be measured, calculation such as formula
Shown in 1:
G (dB)=P (Φ) Pref(dBm) (1)
Wherein, P (Φ) is the reception power that antenna to be measured measures, PrefIt (dBm) is to be obtained to standard gain antenna measurement
Receive power.
GPS antenna directionality test method and system provided by the invention, give and specifically obtain GPS antenna to be measured
Yield value method, the far field width phase of all pilots to be measured due to that can guarantee GPS antenna and standard gain antenna to be measured
The accuracy of data, therefore can guarantee the accuracy of the yield value of the GPS antenna to be measured finally obtained.
Correspondingly, the present invention also provides GPS antenna directionality test macros corresponding with the above method, as shown in fig. 7,
For according to a kind of structural schematic diagram of GPS antenna directionality test macro provided in an embodiment of the present invention.
In the present embodiment, which may include:
Turntable, segmental support, test auxiliary antenna R, test auxiliary antenna pedestal and host computer, host computer are auxiliary with test respectively
Antenna R is helped to be connected with GPS antenna to be measured, turntable is located on the perpendicular bisector of segmental support both ends line.Wherein, the two of segmental support
End is located in the same horizontal plane, which can need it is not limited here for semicircle, arc-shaped, ellipse arc etc.
It is bright, it will be appreciated by those skilled in the art that: when the shape of segmental support is different or the distance between turntable and segmental support change
When, correspondingly the coordinate (test coordinate, test angle) of test point can be different.Test auxiliary antenna pedestal is slidably fixed to
On segmental support, for fixed test auxiliary antenna R.
Turntable turns to specified angle for fixing GPS antenna to be measured, by GPS antenna to be measured.
Host computer is used to divide space in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains
To pilot to be measured, then, bow is then obtained according to the test angle that pilot to be measured calculates the test coordinate and turntable of segmental support
GPS antenna to be measured under each test coordinate of shape frame and each test angle of turntable receives the letter of test auxiliary antenna R transmitting
Then number intensity determines to be measured according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
The antenna directivity of GPS antenna.
Wherein, for the ease of building test platform, the turntable and the segmental support are located outside place, the outdoor sports
Forbid the radio-frequency apparatus for having with GPS antenna to be measured with frequency band.
In order to reduce ground return, the material on the ground of the outdoor sports is absorbing material.
The distance between the turntable and segmental support are 20 times of GPS wavelength.
Further, the system can also include:
Vector network analyzer is connected with test auxiliary antenna R, GPS antenna to be measured and host computer respectively, and being used for will be to be measured
The far field width phase data that GPS antenna is sent is transformed into time domain, time domain gating processing is then carried out, after then handling time domain gating
Data be transformed into frequency domain, and be sent to host computer.
The data that the host computer is specifically used for being transformed into frequency domain based on the received draw antenna radiation pattern.
In other embodiments, the system can also include:
Vector network analyzer, respectively with test auxiliary antenna R, GPS antenna to be measured, standard gain antenna and host computer phase
Even, for the far field width phase data of GPS antenna to be measured and the transmission of standard gain antenna to be transformed into time domain, time domain choosing is then carried out
Logical processing, then by time domain gating, treated that data are transformed into frequency domain, and is sent to host computer.
The host computer is specifically used for the number for being transformed into frequency domain sent according to GPS antenna to be measured and standard gain antenna
According to obtaining the yield value of GPS antenna to be measured.
It should be noted that in order to protect GPS antenna, one can be connected between vector network analyzer and GPS antenna
A attenuator.
As shown in figure 8, for according to a kind of structural schematic diagram of antenna directivity test platform provided in an embodiment of the present invention.
In a specific embodiment, the application method of the platform may include: (1) preparation stage: arrangement automobile is in turntable, to be measured
GPS antenna and test auxiliary antenna R set up, complete antenna cables to be measured connection, test auxiliary antenna R is moved to specify it is to be measured
Pilot；
(2) test phase: realize that the width phase data acquisition of each plane of GPS antenna (is adopted using turntable under the pilot to be measured
Sample time gate measuring technology)；After turntable completion rotates a circle, test auxiliary antenna R is moved to the next position, before recycling
Testing procedure；
(3) result exports: stopping test after testing auxiliary antenna R and being moved to and be finally stopped test point, completes to observation
The acquisition of all far field width phase datas of line, and export GPS antenna directionality to be measured.
The GPS antenna directionality test macro of the bright offer of this hair embodiment, the antenna directivity test platform include: to place
The segmental support of the turntable of GPS antenna to be measured, slidably fixed test auxiliary antenna R, due to the cooperation energy of the turntable and segmental support
Realize precise positioning at any angle between GPS antenna to be measured and test auxiliary antenna R, and since the arch is erected in turntable
Top can really reflect that vehicle GPS antenna receives the scene of signal from top in actual use；In addition, host computer is reasonably drawn
Each pilot to be measured is divided, the test angle of the test coordinate and turntable of segmental support is calculated then according to pilot to be measured, thus may be used
Accurately to be positioned GPS antenna to be measured and test auxiliary antenna R to meet test by antenna directivity test platform
The requirement of point allows the present invention according to strongest signal strength and the test angles of the test coordinate and turntable of corresponding segmental support
Degree is accurately determined the antenna directivity of GPS antenna to be measured.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other.For system embodiment, since it is substantially similar to the method embodiment, so describing
Fairly simple, the relevent part can refer to the partial explaination of embodiments of method.System embodiment described above is only to show
Meaning property, wherein the unit as illustrated by the separation member may or may not be physically separated.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The embodiment of the present invention has been described in detail above, and specific embodiment used herein carries out the present invention
It illustrates, method and system of the invention that the above embodiments are only used to help understand；Meanwhile for the one of this field
As technical staff, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
Claims (8)
1. a kind of GPS antenna directionality test method characterized by comprising
Antenna directivity test platform is built in advance, wherein antenna directivity test platform includes: to place GPS antenna to be measured
The segmental support of turntable, slidably fixed test auxiliary antenna, wherein turntable is located at the perpendicular bisector of segmental support both ends line
On；
Space is divided in the probability that different directions are antenna direction according to GPS antenna to be measured, obtains pilot to be measured；
The test angle of the test coordinate and turntable of segmental support is calculated according to pilot to be measured；
The GPS antenna to be measured obtained under each test coordinate of segmental support and each test angle of turntable receives test auxiliary antenna
The signal strength of transmitting；
GPS antenna to be measured is determined according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
Antenna directivity；
GPS antenna to be measured under each test angle of each test coordinate for obtaining segmental support and turntable receives test auxiliary
Antenna transmitting signal strength include:
Test auxiliary antenna is moved to a test coordinate of segmental support by step S41；
Turntable is gone to each test angle corresponding with test coordinate by step S42；
Step S43, the signal strength of GPS antenna collecting test auxiliary antenna transmitting to be measured；
Step S41 to step S43 is repeated, until acquiring the far field width phase data of all pilots to be measured of GPS antenna to be measured；
Antenna radiation pattern is drawn according to the far field width phase data of all pilots to be measured of GPS antenna to be measured；
The test angle of the test coordinate and turntable according to strongest signal strength and corresponding segmental support determines GPS days to be measured
The antenna directivity of line includes:
The antenna directivity of GPS antenna to be measured is determined according to antenna radiation pattern；
The far field width phase data of all pilots to be measured according to GPS antenna to be measured draws antenna radiation pattern
Far field width phase data is transformed into time domain using the when domain-functionalities of vector network analyzer；
Carry out time domain gating processing；
By time domain gating, treated that data are transformed into frequency domain；
Antenna radiation pattern is drawn according to the data for being transformed into frequency domain.
2. the method according to claim 1, wherein the test platform is located outside place；
It is described to build antenna directivity test platform in advance and include:
In the region for not and on open area of the GPS antenna to be measured with the radio-frequency apparatus of frequency band, choosing predetermined size as surveying
Try land regions；
Set up segmental support；
Turntable is set on the perpendicular bisector of segmental support both ends line；
Absorbing material is laid on the ground in test platform region.
3. the method according to claim 1, wherein the distance between the turntable and segmental support are GPS wavelength
20 times；
Time domain gate-width 5ns is set in time domain gating treatment process between 10ns.
4. the method according to claim 1, wherein the method also includes:
After the far field width phase data for all pilots to be measured for obtaining GPS antenna to be measured, GPS antenna to be measured is changed to standard
Gain antenna；
Step S31 to step S33 is repeated, until the far field width phase data of all pilots to be measured of acquisition standard gain antenna；
GPS antenna to be measured is obtained according to the far field width phase data of the far field width phase data of standard gain antenna and GPS antenna to be measured
Yield value.
5. a kind of GPS antenna directionality test macro characterized by comprising
Turntable, segmental support, test auxiliary antenna, test auxiliary antenna pedestal and host computer, host computer assist day with test respectively
Line is connected with GPS antenna to be measured, and turntable is located on the perpendicular bisector of segmental support both ends line；
Test auxiliary antenna pedestal is slidably fixed on segmental support, for fixed test auxiliary antenna；
Turntable turns to specified angle for fixing GPS antenna to be measured, by GPS antenna to be measured；
Host computer be used for according to GPS antenna to be measured different directions be antenna direction probability space is divided, obtain to
Then test point then obtains segmental support according to the test angle that pilot to be measured calculates the test coordinate and turntable of segmental support
Each test coordinate and turntable each test angle under GPS antenna to be measured receive test auxiliary antenna transmitting signal it is strong
Degree, then, determines GPS days to be measured according to the test angle of the test coordinate and turntable of strongest signal strength and corresponding segmental support
The antenna directivity of line.
6. system according to claim 5, which is characterized in that the turntable and the segmental support are located outside place, should
Outdoor sports forbid the radio-frequency apparatus for having with GPS antenna to be measured with frequency band；
The material on the ground of the outdoor sports is absorbing material；
The distance between the turntable and segmental support are 20 times of GPS wavelength.
7. system according to claim 5, which is characterized in that the system also includes:
Vector network analyzer is connected, for by GPS days to be measured respectively with test auxiliary antenna, GPS antenna to be measured and host computer
Line send far field width phase data be transformed into time domain, then carry out time domain gating processing, then by time domain gating treated number
According to being transformed into frequency domain, and it is sent to host computer；
The data that the host computer is specifically used for being transformed into frequency domain based on the received draw antenna radiation pattern.
8. system according to claim 5, which is characterized in that the system also includes:
Vector network analyzer is connected with test auxiliary antenna, GPS antenna to be measured, standard gain antenna and host computer respectively, uses
In the far field width phase data of GPS antenna to be measured and the transmission of standard gain antenna is transformed into time domain, then carry out at time domain gating
Reason, then by time domain gating, treated that data are transformed into frequency domain, and is sent to host computer；
The host computer is specifically used for the data for being transformed into frequency domain sent according to GPS antenna to be measured and standard gain antenna, obtains
To the yield value of GPS antenna to be measured.
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| CN109269441B (en) * | 2018-11-26 | 2020-06-05 | 北京无线电计量测试研究所 | Error detection method for geometrical performance of bow-shaped frame system |
| CN110275075B (en) * | 2019-06-25 | 2021-08-24 | 中国工程物理研究院应用电子学研究所 | Mobile strong electromagnetic pulse field multipoint collaborative monitoring and situation display system |
| CN110703000B (en) * | 2019-08-26 | 2021-12-03 | 中汽研汽车检验中心（天津）有限公司 | Eccentricity correction method applied to automobile antenna performance test |
| CN111537807A (en) * | 2020-03-31 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for assisting in testing antenna directional diagram in large-maneuvering flight state by unmanned aerial vehicle |
| CN111505396B (en) * | 2020-04-28 | 2022-03-04 | 中国电子科技集团公司第三十八研究所 | Short wave antenna gain test method and system |
| CN114726456A (en) * | 2021-01-05 | 2022-07-08 | 中国移动通信有限公司研究院 | Active antenna test method, device, terminal, system, equipment and storage medium |
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