CN103454542B - Antenna and transmission line tester and real-time automatic calibrating method - Google Patents

Antenna and transmission line tester and real-time automatic calibrating method Download PDF

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CN103454542B
CN103454542B CN201310431767.5A CN201310431767A CN103454542B CN 103454542 B CN103454542 B CN 103454542B CN 201310431767 A CN201310431767 A CN 201310431767A CN 103454542 B CN103454542 B CN 103454542B
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error coefficient
frequency
temperature
transmission line
signal
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CN103454542A (en
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韩晓东
朱伟
赵苏宇
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CLP Kesiyi Technology Co Ltd
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CETC 41 Institute
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Abstract

Present invention achieves a kind of can the antenna of real-time automatic calibrating and transmission line tester.Analyser built-in temperature sensor, during tester start, software in machine automatically read be stored in inner FLASH error coefficient file to internal memory, and the two-dimensional interpolation calculating of error coefficient is carried out according to the Current Temperatures that frequency values and the temperature sensor of current setting detect, obtain suitable error coefficient item and automatically carry out error correction.When temperature sensor detects that temperature c changes or resets frequency of operation, tester automatically repeats above-mentioned error coefficient solution procedure and obtains new error coefficient item and re-start error correction.Above-mentioned all operations is all carried out by software automatically on backstage, operates without the need to user.User no longer needs to carry out any manual calibration operation in use tester process, can test at any time.

Description

Antenna and transmission line tester and real-time automatic calibrating method
Technical field
The present invention relates to field tests, particularly the automatic calibration method of testing of antenna and transmission line and corresponding tester.
Background technology
Antenna (Antenna) and transmission line play the role of signal transmitting and receiving in wireless communications, therefore, include the product of antenna and transmission line in the process of producing and implement, and must measure the performance of antenna and transmission line and parameter.
At present, antenna and transmission line tester must carry out calibration before the use to obtain systematic error, and use vector error modification method to remove systematic error in testing.The method of current calibration has two kinds: mechanically calibrated method and Electronic Calibration method.No matter be mechanically calibrated or Electronic Calibration, all need to connect calibrating device by manual operation before testing and carry out, the alignment time is long, efficiency is low, and the change along with environment temperature needs to recalibrate.
, due to the imperfection of its hardware system, there is systematic error in antenna and transmission line tester, the error model that its systematic error can have 3 error coefficients with represents, as shown in Figure 1: three error coefficient item are E d(directivity), E s(source coupling), E r(skin tracking), a is incident wave, and b is reflection wave, г mfor measuring reflection coefficient, г is actual reflection coefficient.
The relation of error coefficient item, measurement of reflection-factor value, reflection coefficient actual value can be drawn, as shown in formula (1) by Fig. 1:
г m＝E d-(E dE s-E r)г+E sг mг(1)
Existing calibration and error correcting method use mechanical calibration kits or Electronic Calibration part.Mechanical alignment process, for connecting open circuit device, short-circuiting device successively, loading to test port, obtains the system of equations be made up of 3 formula (1) equations, carries out solving equations and obtain error coefficient item.Electronic Calibration process is for connecting Electronic Calibration part to test port, and Electronic Calibration part inside forms various electronic standard by electronic switch, obtains the system of equations be made up of formula (1), carries out solving equations and obtain error coefficient item.In test below, use error coefficient entry uses formula (1) to carry out error correction equally to measured value and obtains correct measured value.
The shortcoming of existing antenna and transmission line tester calibration steps is: calibrating device must be used before test to carry out manual calibration, and calibration process speed is slow, and easily calibrates unsuccessfully owing to connecting inaccurate causing; Each calibration operation can only guarantee the accuracy in certain temperature range, when larger change occurs environment temperature, needs to re-start calibration; When building Auto-Test System, the calibration operation of antenna and transmission line tester can reduce automaticity and the testing efficiency of Auto-Test System.
The present invention is directed to these shortcomings, a kind of antenna and transmission line tester of energy real-time automatic calibrating are invented, this tester inside has a temperature sensor to carry out temperature detection in real time, the systematic error coefficient files measured before dispatching from the factory is prestored in inner FLASH memory, this error information file comprises the error coefficient item of this tester at several temperatures on some Frequency points, in test process, antenna and transmission line tester use the two-dimensional interpolation algorithm based on frequency and temperature automatically to carry out error current coefficient in real time and solve.Do not need to carry out any manual calibration during this antenna and transmission line tester use to operate, can calibrate in real time along with the change of environment temperature, when using this tester to test, can significantly improve automaticity and testing efficiency.
Summary of the invention
Present invention achieves a kind of can the antenna of real-time automatic calibrating and transmission line tester, user does not in use need to carry out any manual calibration operation, can test at any time.
According to an aspect of the present invention, achieve a kind of can the antenna of real-time automatic calibrating and transmission line tester, described antenna and transmission line tester comprise: signal synthesizing module (1), power splitter (2), directional coupler (3), width Phase Receiver machine module (5), FPGA Digital IF Processing module (6), cpu controller (7), FLASH memory (9), temperature sensor (10); Test port (4) is connected with directional coupler (3); Communication interface (8) is connected with cpu controller (7).
According to an aspect of the present invention, signal synthesizing module (1) is made up of exciting signal source (11) and local oscillation signal source (12).
According to an aspect of the present invention, described temperature sensor (10) carries out temperature detection in real time, and prestore in described FLASH memory (9) error coefficient file.
According to an aspect of the present invention, width Phase Receiver machine module comprises two frequency mixer and two modulus (A/D) converters, the road signal that first frequency mixer is used for the road that power splitter (2) exports exports as signal and local oscillation signal source (12) with reference to signal carries out mixing, and mixer output signal is exaggerated through R passage the first input end mouth outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion; Second frequency mixer is used for another road signal that the road that exports directional coupler (3) exports as signal and local oscillation signal source (12) of measured piece reflected signal and carries out mixing, and mixer output signal is exaggerated through A channel the second input port outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion.
According to an aspect of the present invention, FPGA Digital IF Processing module (6) carries out I/Q decomposition and filtering to digital medium-frequency signal, extracts amplitude information and the phase information of tested network, and sends to cpu controller (7).
According to another aspect of the present invention, achieve a kind of can the antenna of real-time automatic calibrating and transmission line method of testing, when tester is started shooting, first error coefficient file is read internal memory; The two-dimensional interpolation carrying out error coefficient according to ongoing frequency value and current temperature value calculates, and obtains suitable error coefficient item; It is characterized in that, error coefficient solution procedure comprises:
A, judge the scope of ongoing frequency f:
The deterministic process of ongoing frequency f scope, namely judges f value is between which two Frequency point of error coefficient file:
Step is 1.: establish a counting variable i=0;
Step is 2.: judge whether freqStart+i × freqStep≤f≤freqStart+ (i+1) × freqStep sets up;
Step is 3.: if 2. step is false, make i=i+1, repeat step 2. ~ 3.; If 2. step is set up, then carry out step 4.;
Step is 4.: if 2. step is set up, then frequency f value is in error coefficient file between i-th and the i-th+1 point, and the frequency values of i-th is that freqStart+i × freqStep is designated as f1; The frequency values of the i-th+1 is that freqStart+ (i+1) × freqStep is designated as f2, completes judgement.
Wherein, freqStart is in the error coefficient file prestored in instrument, the initial frequency that error coefficient is corresponding;
FreqStep is in the error coefficient file prestored in instrument, the step frequency that error coefficient is corresponding;
N is in the error coefficient file prestored in instrument, the Frequency point number that error coefficient is corresponding.
In above deterministic process, i variable can be increased to N-2 by 0, as i=N-2 and frequency f f1=freqStart+ (N-2) × freqStep, f2=freqStart+ (N-1) × freqStep between latter two Frequency point in error coefficient file
If freqStart+i × freqStep≤f≤freqStart+ (i+1) × freqStep0≤i≤N-2
Then make f1=freqStart+i × freqStep;
f2＝freqStart+(i+1)×freqStep；
Ongoing frequency f is positioned at [f 1, f 2] scope, frequency interpolation calculates will use f 1point and f 2point data;
B, judge the scope of Current Temperatures C:
Three temperature values are read from data file, Current Temperatures is made to be in these three temperature values between certain two, and they are sorted, if ranking results is C1≤C2≤C3, if c≤C2, then the data that in usage data file, temperature C1 and temperature C2 is corresponding carry out interpolation calculation, if c > is C2, the data that then in usage data file, temperature C2 and temperature C3 is corresponding carry out interpolation calculation, establish Current Temperatures c≤C2 herein;
C, carry out interpolation according to frequency:
The directional error coefficient data at temperature C1, frequency f place is drawn by line segment interpolation:
Ed ( C 1 , f ) = Ed ( C 1 , f 1 ) + Ed ( C 1 , f 2 ) - Ed ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 )
Temperature C1, source, frequency f place coupling, skin tracking error coefficient are:
Es ( C 1 , f ) = Es ( C 1 , f 1 ) + Es ( C 1 , f 2 ) - Es ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 )
Er ( C 1 , f ) = Er ( C 1 , f 1 ) + Er ( C 1 , f 2 ) - Er ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 )
The error coefficient at temperature C2, frequency f place is:
Ed ( C 2 , f ) = Ed ( C 2 , f 1 ) + Ed ( C 2 , f 2 ) - Ed ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 )
Es ( C 2 , f ) = Es ( C 2 , f 1 ) + Es ( C 2 , f 2 ) - Es ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 )
Er ( C 2 , f ) = Er ( C 2 , f 1 ) + Er ( C 2 , f 2 ) - Er ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 )
D, obtained the directional error coefficient at Current Temperatures c place by line segment interpolation:
Ed ( c , f ) = Ed ( C 1 , f ) + Ed ( C 2 , f ) - Ed ( C 1 , f ) C 2 - C 1 ( c - C 1 )
The source coupling at temperature c place, skin tracking error coefficient are:
Es ( c , f ) = Es ( C 1 , f ) + Es ( C 2 , f ) - Es ( C 1 , f ) C 2 - C 1 ( c - C 1 )
Er ( c , f ) = Er ( C 1 , f ) + Er ( C 2 , f ) - Er ( C 1 , f ) C 2 - C 1 ( c - C 1 ) .
According to another aspect of the present invention, as temperature c, when frequency f changes, tester repeats steps A automatically, B, C obtain new error coefficient item.
Tester of the present invention in use without any need for calibration operation, save time, improve testing efficiency; The automatic calibration algorithm of this tester can carry out error coefficient calculating in real time according to the change of temperature and set of frequency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Figure 1 shows that the error coefficient model according to the embodiment of the present invention;
Figure 2 shows that the block diagram of antenna according to the embodiment of the present invention and transmission line tester;
Figure 3 shows that the error coefficient file layout figure according to the embodiment of the present invention;
Figure 4 shows that the frequency interpolation curve according to the embodiment of the present invention;
Figure 5 shows that the temperature interpolation curve according to the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Hardware scheme theory diagram of the present invention as shown in Figure 2, mainly comprises: signal synthesizing module 1, power splitter 2, directional coupler 3, width Phase Receiver machine module 5, FPGA Digital IF Processing module 6, cpu controller 7, FLASH memory 9, temperature sensor 10.
Signal synthesizing module is made up of exciting signal source 11 and local oscillation signal source 12; Width Phase Receiver machine module comprises two frequency mixer and two modulus (A/D) converters, the road signal that first frequency mixer is used for the road that power splitter 2 exports exports as signal and the local oscillation signal source 12 with reference to signal carries out mixing, and mixer output signal is exaggerated through R passage the first input end mouth outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion; Mixing is carried out as the signal of measured piece reflected signal and another road signal of local oscillation signal source 12 output in the road that second frequency mixer is used for directional coupler 3 exports, and mixer output signal is exaggerated through A channel the second input port outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion.
Communication interface 8 receives cpu controller; Test port 4 is connected to directional coupler 3.
Exciting signal source produces pumping signal, two-way is divided into through power splitter, one tunnel characterizes incident wave as sending into R passage with reference to signal, and another road is added to the pumping signal of measured piece as measured piece through directional coupler, and the reflection wave of measured piece is separated feeding A channel by directional coupler.Local oscillation signal source produces the fixing local oscillation signal of the frequency difference synchronous with exciting signal source, and the signal and the local oscillation signal that enter R passage and A channel carry out fundamental wave mixing, exports intermediate-freuqncy signal.Intermediate-freuqncy signal, through amplification filtering and A/D digitizing, is converted to digitised Intermediate Frequency, and FPGA Digital IF Processing module carries out I/Q decomposition and filtering to digital intermediate frequency, extracts amplitude information and the phase information of tested network, sends to CPU.CPU obtains the reflection parameters of tested network through ratio computing, error correction.
Before dispatching from the factory, antenna and transmission line tester carry out humid test: set the sweep parameter such as frequency range, number of scan points, and arranging frequency range in the present embodiment is 3MHz ~ 88Mz, and frequency step is 1MHz, and number of scan points is 86.Respectively at different temperature, the present embodiment is 0 DEG C, 25 DEG C, 30 DEG C, 35 DEG C, 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 65 DEG C, 70 DEG C, 75 DEG C, 80 DEG C, classic method is used to calibrate to tester, obtain the error coefficient under different temperatures and be stored in FLASH memory with document form, file layout as shown in Figure 3.Error coefficient file content is: initial frequency, frequency step, count, the error coefficient item (source coupling, directivity, skin tracking) of temperature value C1 and correspondence, the error coefficient item (source coupling, directivity, skin tracking) of temperature value C2 and correspondence, the error coefficient item (source coupling, directivity, skin tracking) of temperature value C3 and correspondence, the rest may be inferred.
Antenna and transmission line tester real-time automatic calibrating method are: when tester is started shooting, program by reading error coefficient files to internal memory, and according to ongoing frequency value and current temperature value carry out error coefficient two-dimensional interpolation calculate, obtain suitable error coefficient item.If current temperature value is c, survey frequency point f, now the error coefficient item at Frequency point f place is expressed as follows:
Directivity: Ed (c, f)
Source is mated: Es (c, f)
Skin tracking: Er (c, f)
Error current coefficient solution procedure is as follows:
1. the scope of ongoing frequency f is judged
If freqStart+i × freqStep≤f≤freqStart+ (i+1) × freqStep0≤i≤N-2
If f1=freqStart+i × freqStep
f2＝freqStart+(i+1)×freqStep
Then ongoing frequency f is positioned at [f 1, f 2] scope, frequency interpolation calculates will use f 1point and f 2point data.
2. the scope of Current Temperatures c is judged
Three temperature values are read out from data file, Current Temperatures is made to be in these three temperature values between certain two, and they are sorted, if ranking results is C1≤C2≤C3, if c≤C2, the data that then in usage data file, temperature C1 and temperature C2 is corresponding carry out interpolation calculation, if c > is C2, then the data that in usage data file, temperature C2 and temperature C3 is corresponding carry out interpolation calculation.Establish Current Temperatures c≤C2 herein.
3. according to frequency interpolation
Be illustrated in figure 4 the directional error coefficient that temperature C1 in data file is corresponding, the directional error coefficient data at frequency f place is drawn by line segment interpolation, as shown in formula (2).Same temperature C1, source, frequency f place coupling, skin tracking error coefficient are as shown in formula (3), (4), and the error coefficient at temperature C2, frequency f place is as shown in formula (5), (6), (7).
Ed ( C 1 , f ) = Ed ( C 1 , f 1 ) + Ed ( C 1 , f 2 ) - Ed ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 2 )
Wherein, Ed (C1, f 1): in error coefficient file, temperature C1, frequency f 1the directional error coefficient at place;
Ed (C1, f 2): in error coefficient file, temperature C1, frequency f 2the directional error coefficient at place;
Ed (C1, f): interpolation goes out, temperature C1, the directional error coefficient at frequency f place.
Es ( C 1 , f ) = Es ( C 1 , f 1 ) + Es ( C 1 , f 2 ) - Es ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 3 )
Wherein, Es (C1, f 1): in error coefficient file, temperature C1, frequency f 1the source matching error coefficient at place;
Es (C1, f 2): in error coefficient file, temperature C1, frequency f 2the source matching error coefficient at place;
Es (C1, f): interpolation goes out, temperature C1, the source matching error coefficient at frequency f place.
Er ( C 1 , f ) = Er ( C 1 , f 1 ) + Er ( C 1 , f 2 ) - Er ( C 1 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 4 )
Wherein, Er (C1, f 1): in error coefficient file, temperature C1, frequency f 1the skin tracking error coefficient at place;
Er (C1, f 2): in error coefficient file, temperature C1, frequency f 2the skin tracking error coefficient at place;
Er (C1, f): interpolation goes out, temperature C1, the skin tracking error coefficient at frequency f place.
Ed ( C 2 , f ) = Ed ( C 2 , f 1 ) + Ed ( C 2 , f 2 ) - Ed ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 5 )
Wherein, Ed (C2, f 1): in error coefficient file, temperature C2, frequency f 1the directional error coefficient at place;
Ed (C2, f 2): in error coefficient file, temperature C2, frequency f 2the directional error coefficient at place;
Ed (C2, f): interpolation goes out, temperature C2, the directional error coefficient at frequency f place.
Es ( C 2 , f ) = Es ( C 2 , f 1 ) + Es ( C 2 , f 2 ) - Es ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 6 )
Wherein, Es (C2, f 1): in error coefficient file, temperature C2, frequency f 1the source matching error coefficient at place;
Es (C2, f 2): in error coefficient file, temperature C2, frequency f 2the source matching error coefficient at place;
Es (C2, f): interpolation goes out, temperature C2, the source matching error coefficient at frequency f place.
Er ( C 2 , f ) = Er ( C 2 , f 1 ) + Er ( C 2 , f 2 ) - Er ( C 2 , f 1 ) f 2 - f 1 × ( f - f 1 ) - - - ( 7 )
Wherein, Er (C2, f 1): in error coefficient file, temperature C2, frequency f 1the skin tracking error coefficient at place;
Er (C2, f 2): in error coefficient file, temperature C2, frequency f 2the skin tracking error coefficient at place;
Er (C2, f): interpolation goes out, temperature C2, the skin tracking error coefficient at frequency f place.
4. according to temperature interpolation
Figure 5 shows that at temperature C1, C2, the directional error coefficient at C3 lower frequency f place, the directional error coefficient at Current Temperatures c place can be obtained by line segment interpolation, as formula (8), in like manner can obtain source coupling, the skin tracking error coefficient at temperature c place, as publicity (9), shown in (10).
Ed ( c , f ) = Ed ( C 1 , f ) + Ed ( C 2 , f ) - Ed ( C 1 , f ) C 2 - C 1 ( c - C 1 ) - - - ( 8 )
Wherein, Ed (C1, f): formula (2) interpolation result: temperature C1, the directional error coefficient at frequency f place;
Ed (C2, f): formula (5) interpolation result: temperature C2, the directional error coefficient at frequency f place;
Ed (c, f): interpolation goes out, temperature c, the directional error coefficient at frequency f place.
Es ( c , f ) = Es ( C 1 , f ) + Es ( C 2 , f ) - Es ( C 1 , f ) C 2 - C 1 ( c - C 1 ) - - - ( 9 )
Wherein, Es (C1, f): formula (3) interpolation result: temperature C1, the source matching error coefficient at frequency f place;
Es (C2, f): formula (6) interpolation result: temperature C2, the source matching error coefficient at frequency f place;
Es (c, f): interpolation goes out, temperature c, the source matching error coefficient at frequency f place.
Er ( c , f ) = Er ( C 1 , f ) + Er ( C 2 , f ) - Er ( C 1 , f ) C 2 - C 1 ( c - C 1 ) - - - ( 10 )
Wherein, Er (C1, f): formula (4) interpolation result: temperature C1, your error coefficient of the skin tracking at frequency f place;
Er (C2, f): formula (7) interpolation result: temperature C2, the skin tracking error coefficient at frequency f place;
Er (c, f): interpolation goes out, temperature c, the skin tracking error coefficient at frequency f place.
Finally determine under temperature c by above step, the error coefficient item at frequency f place.As temperature c, when frequency f changes, repeat step and 1., 2., 3. obtain new error coefficient item.
Compared to existing technology, tester of the present invention in use without any need for calibration operation, save time, improve testing efficiency.The automatic calibration algorithm of this tester can carry out error coefficient calculating in real time according to the change of temperature and set of frequency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. one kind can the antenna of real-time automatic calibrating and transmission line method of testing, based on a kind of antenna and transmission line tester, described antenna and transmission line tester comprise: signal synthesizing module (1), power splitter (2), directional coupler (3), width Phase Receiver machine module (5), FPGA Digital IF Processing module (6), cpu controller (7), FLASH memory (9), temperature sensor (10);
Test port (4) is connected with directional coupler (3);
Communication interface (8) is connected with cpu controller (7);
When tester is started shooting, first error coefficient file is read internal memory; The two-dimensional interpolation carrying out error coefficient according to ongoing frequency value and current temperature value calculates, and obtains suitable error coefficient item; It is characterized in that, error coefficient solution procedure comprises:
A, judge the scope of ongoing frequency f
If freqStart+i × freqStep≤f≤freqStart+ (i+1) × freqStep0≤i≤N-2
If f1=freqStart+i × freqStep
f2＝freqStart+(i+1)×freqStep
Then ongoing frequency f is positioned at [f 1, f 2] scope, frequency interpolation calculates will use f 1point and f 2point data;
B, judge the scope of Current Temperatures C
To three the temperature value sequences read out from data file, if ranking results is C1≤C2≤C3, if c≤C2, the data that then in usage data file, temperature C1 and temperature C2 is corresponding carry out interpolation calculation, if c >=C2, the data that then in usage data file, temperature C2 and temperature C3 is corresponding carry out interpolation calculation, establish Current Temperatures c≤C2 herein;
C, carry out interpolation according to frequency
The directional error coefficient data at frequency f place is drawn by line segment interpolation:
Temperature C1, source, frequency f place coupling, skin tracking error coefficient are:
The error coefficient at temperature C2, frequency f place is:
D, obtained the directional error coefficient at Current Temperatures c place by line segment interpolation:
The source coupling at temperature c place, skin tracking error coefficient are:
。
2. according to the antenna shown in claim 1 and transmission line method of testing, it is characterized in that: signal synthesizing module (1) is made up of exciting signal source (11) and local oscillation signal source (12).
3. according to the antenna shown in claim 1 and transmission line method of testing, it is characterized in that: described temperature sensor (10) carries out temperature detection in real time, prestore in described FLASH memory (9) error coefficient file.
4. according to the antenna shown in claim 1 and transmission line method of testing, it is characterized in that: width Phase Receiver machine module comprises two frequency mixer and two modulus (A/D) converters, the road signal that first frequency mixer is used for the road that power splitter (2) exports exports as signal and local oscillation signal source (12) with reference to signal carries out mixing, and mixer output signal is exaggerated through R passage the first input end mouth outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion; Second frequency mixer is used for another road signal that the road that exports directional coupler (3) exports as signal and local oscillation signal source (12) of measured piece reflected signal and carries out mixing, and mixer output signal is exaggerated through A channel the second input port outputting to FPGA Digital IF Processing module after filtering and analog to digital conversion.
5. the antenna according to any one of claim 1-4 and transmission line method of testing, it is characterized in that: FPGA Digital IF Processing module (6) carries out I/Q decomposition and filtering to digital medium-frequency signal, extract amplitude information and the phase information of tested network, and send to cpu controller (7).
6. the antenna according to any one of claim 1-4 and transmission line method of testing, is characterized in that: as temperature c, and when frequency f changes, repetition steps A, B, C obtain new error coefficient item.
7. according to the antenna shown in claim 5 and transmission line method of testing, it is characterized in that: as temperature c, when frequency f changes, repetition steps A, B, C obtain new error coefficient item.
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