CN105049138A - Simple test device and method for harmonic wave network parameters - Google Patents

Abstract

The invention discloses a simple test device and method for harmonic wave network parameters, belonging to the field of harmonic wave network parameter test. The device comprises a frequency reference module, a selection switch, a test port, a coupler, a frequency doubling selection unit, a down-conversion receiver, a computer module and a load. Firstly, phase calibration of the frequency doubling selection unit is carried out by use of the above device, then, the harmonic wave network parameter test is carried out. The simple test device for harmonic wave network parameters is reasonable in design, has a simple structure, and has low cost. Selection of direction connection, second harmonic generation, third harmonic generation till N harmonic generation of a signal is realized by use of the frequency doubling selection unit. Excitation of the frequency doubling selection unit uses an input signal rather than a frequency reference signal. The method does not need an interpolation algorithm, and phase calibration is simple. The conventional harmonic wave network parameter test has high cost and complicated calibration and test processes, and needs introduction of a numerical interpolation algorithm, and phase calibration of a dress and make up generator is very difficult. The method solves the above problems and has good popularization value.

Description

A kind of easy harmonic nests parameter test device and method

Technical field

The invention belongs to harmonic nests parameter testing field, be specifically related to a kind of easy harmonic nests parameter test device and method.

Background technology

Along with the development of modern microwave millimeter-wave communication system, high-speed wideband technology has become the trend of development, this new technology often requires that communication system has the feature of multicarrier, great dynamic range, therefore very harsh to the linearity of microwave device.Therefore for microwave device parts, as wide bandgap semiconductor, nonlinear method of testing becomes the focus of microwave designing and the concern of test industry.Current microwave device parts non-linear test is all based on harmonic-model, i.e. network input selection tone signal (can be a frequency and also can be frequency sweep), the harmonic wave frequency accepting He Ne laser input of tested network, carries out vector reception.The main problem of current this harmonic parameters method of testing be the testing cost of harmonic reference phase place more greatly, comparatively loaded down with trivial details.

In current harmonic nests parameter testing, frequency of utilization reference signal loads on dressing generator, dressing generator produce full frequency band, each Frequency point uniformly, the fixed phase of each frequency is provided.The phase place of other frequency in frequency range is by numerical algorithm interpolation.This method has two shortcomings:

(1) the dressing generator of wide-band (as 10M ~ 26.5/40/50GHz) is very expensive, and external embargo is serious.

(2) numerical interpolation of phase place and the phase alignment of dressing generator very difficult.

Summary of the invention

For the above-mentioned technical problem existed in prior art, the present invention proposes a kind of easy harmonic nests parameter test device and method, reasonable in design, overcome the deficiencies in the prior art, structure is simple, with low cost, and phase alignment is simple, has good effect.

To achieve these goals, the present invention adopts following technical scheme:

A kind of easy harmonic nests parameter test device, comprises frequency reference module, selector switch, test port, coupler, frequency multiplication selected cell, down-conversion receiver, computer module and load;

Described selector switch, comprises the first selector switch, the second selector switch and the 3rd selector switch;

Described test port, comprises the first test port and the second test port;

Described frequency multiplication selected cell, comprises the first frequency multiplication selected cell and the second frequency multiplication selected cell, for the selection of straight-through, two frequencys multiplication, the frequency tripling to N frequency multiplication that realize signal;

Described down-conversion receiver, comprise the R1 receiver of the outgoing wave for detecting the first test port, for detect the outgoing wave of the second test port R2 receiver, for detecting the A receiver of the incident wave of the first test port and the B receiver for the incident wave that detects the second test port;

Described coupler, comprises the first coupler, the second coupler, the 3rd coupler and the 4th coupler;

Described first coupler is used for sending into the first frequency multiplication selected cell from the coupling unit signal that transmits of the first test port;

Described second coupler is used for sending into A receiver from the incoming signal coupling unit signal of the first test port;

Described 3rd coupler is used for sending into the second frequency multiplication selected cell from the coupling unit signal that transmits of the second test port;

Described 4th coupler is used for sending into B receiver from the incoming signal coupling unit signal of the second test port;

Described down-conversion receiver forms primarily of frequency mixing module, intermediate frequency conditioning module, A/D modular converter and DSP vectors calculation module;

Described load comprises the first load and the second load;

Described frequency reference module, produces a signal source and one for providing the local vibration source of local oscillation signal for down-conversion receiver; Described signal source is divided into two-way via the first selector switch, wherein a road is loaded on the first test port through the first coupler, the second selector switch, the second coupler, and another road is loaded on the second test port through the 3rd coupler, the 3rd selector switch, the 4th coupler; Described first coupler sends into the first frequency multiplication selected cell from the coupling unit signal that transmits of the first test port; Described second coupler sends into A receiver from the incoming signal coupling unit signal of the first test port; Described 3rd coupler sends into the second frequency multiplication selected cell from the coupling unit signal that transmits of the second test port; Described 4th coupler sends into B receiver from the incoming signal coupling unit signal of the second test port; Enter local oscillation signal that the signal in R1 receiver, R2 receiver, A receiver and B receiver produces with local vibration source respectively to carry out fundamental wave mixing and export intermediate-freuqncy signal, described intermediate-freuqncy signal is carried out entering A/D modular converter after intermediate frequency conditioning through intermediate frequency conditioning module and is carried out sampling, changing, enter DSP vectors calculation module afterwards, I/Q decomposition and filtering are carried out to digitized intermediate frequency signal, extract amplitude information and the phase information of measured piece, and send to computer module to carry out showing and control.

In addition, the present invention also mentions a kind of easy harmonic nests parameter test method, and first carry out the phase alignment of frequency multiplication selected cell before test, the method adopts the easy harmonic nests parameter test device of above-mentioned one, and calibration steps carries out as follows:

Step 1: be connected by cable between the first test port with the second test port;

Step 2: the first selector switch gating first test port, the second selector switch gating signal source, the 3rd selector switch gating second load, test positive error;

Step 3: the first frequency multiplication selected cell is selected straight-through, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is f ₁-f _iF, read R1 receiver phase

Step 4: the first frequency multiplication selected cell selects 2 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 2f ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^2=\∠{\mathrm{\θ}}_1^2-2\∠{\mathrm{\θ}}_1^1;$

Step 5: the first frequency multiplication selected cell selects 3 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 3f ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^3=\∠{\mathrm{\θ}}_1^2-3\∠{\mathrm{\θ}}_1^1;$

Step 6: the first frequency multiplication selected cell selects N frequency multiplication, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is Nf ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^N={\mathrm{\θ}}_1^2-N\∠{\mathrm{\θ}}_1^1;$

Step 7: change signal source frequency is f ₂, f ₃..., f _n, repeat step 3-step 5, test forward 2 multiple frequency phase error 3 multiple frequency phase errors and N multiple frequency phase error

Step 8: switch 1 gating port 2, the load of switch 2 gating first, switch 3 gating signal source, repeats step 3-step 6 and tests reverse 2 multiple frequency phase errors 3 multiple frequency phase errors and N multiple frequency phase error

After frequency multiplication selected cell phase alignment, carry out the parameter testing of harmonic nests, method of testing comprises the steps:

Step 1: for testing the linear response of two-port network; Signal source frequency is made to be f ₁, f ₂..., f _n, intermediate frequency exports as f _iF, so local vibration source is f _iO=f ₁-f _iF, f ₂-f _iF..., f _n-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell are selected straight-through, the linear response of test two-port network; Try to achieve the double-port network parameter of measured piece based on black-box model according to R1, R2 receiver and A, B receiver, R1 receiver represents a1 ripple during a2=0, and R2 receiver represents a2 ripple during a1=0, and A, B receiver detects b1 and b2 ripple;

Step 2: for testing the second harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=2*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 2 frequencys multiplication, the second harmonic response of test two-port network; Two frequencys multiplication of a1 ripple when R1 receiver represents a2=0, two frequencys multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the second harmonic of b1 and b2 ripple, and test phase result is with the second harmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 3: for testing the third harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=3*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 3 frequencys multiplication, the third harmonic response of test two-port network; The frequency tripling of a1 ripple when R1 receiver represents a2=0, the frequency tripling of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the triple-frequency harmonics of b1 and b2 ripple, and test phase result is with the triple-frequency harmonics amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 4: for testing the N subharmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=N*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select N frequency multiplication, the N subharmonic response of test two-port network; The N frequency multiplication of a1 ripple when R1 receiver represents a2=0, the N frequency multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the N subharmonic of b1 and b2 ripple, and test phase result is with the N subharmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 5: test result is used nonlinear scattering function s-matrix to represent, [b]=[S] [a].

Preferably, described frequency multiplication selected cell is N frequency multiplication selector channel, and N gets positive integer.

The Advantageous Effects that the present invention brings:

The present invention proposes a kind of easy harmonic nests parameter test device and method, compared with prior art, a kind of easy harmonic nests parameter test device and method, reasonable in design, structure is simple, with low cost, frequency multiplication selected cell is used to realize the straight-through of signal, two frequencys multiplication, frequency tripling is to the selection of N frequency multiplication, the excitation of frequency multiplication selected cell uses input signal instead of frequency reference signal, do not need interpolation algorithm, phase alignment is simple, efficiently solve existing harmonic nests parameter testing cost high, calibration and test process loaded down with trivial details, need the problem that the phase alignment of introducing numerical value interpolation algorithm and dressing generator is very difficult, there is good promotional value.

Accompanying drawing explanation

Fig. 1 is the hardware elementary diagram of a kind of easy harmonic nests parameter test device of the present invention.

Fig. 2 is the FB(flow block) of the phase alignment of frequency multiplication selected cell in the present invention.

Fig. 3 is the FB(flow block) of a kind of easy harmonic nests parameter test method of the present invention.

Fig. 4 is the schematic diagram of black-box model in a kind of easy harmonic nests parameter test method of the present invention.

Wherein, 1-frequency reference module; 101-local vibration source; 102-signal source; 2-computer module; 3-R1 receiver; 4-R2 receiver; 5-A receiver; 6-B receiver; 7-first frequency multiplication selected cell; 8-first coupler; 9-first load; 10-second coupler; 11-second selector switch; 12-first test port; 13-second frequency multiplication selected cell; 14-the 4th coupler; 15-first selector switch; 16-the 3rd coupler; 17-second load; 18-the 3rd selector switch; 19-second test port.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:

Embodiment 1:

As shown in Figure 1, a kind of hardware elementary diagram of easy harmonic nests parameter test device, comprises frequency reference module 1, selector switch, test port, coupler, frequency multiplication selected cell, down-conversion receiver, computer module 2 and load;

Described selector switch, comprises the first selector switch 15, second selector switch 11 and the 3rd selector switch 18;

Described test port, comprises the first test port 12 and the second test port 19;

Described frequency multiplication selected cell, comprises the first frequency multiplication selected cell 7 and the second frequency multiplication selected cell 13, for providing phase reference;

Described down-conversion receiver, comprise the R1 receiver 3 of the outgoing wave for detecting the first test port 12, for detect the outgoing wave of the second test port 19 R2 receiver 4, for detecting the A receiver 5 of the incident wave of the first test port 12 and the B receiver 6 for the incident wave that detects the second test port 19;

Described coupler, comprises the first coupler 8, second coupler 10, the 3rd coupler 16 and the 4th coupler 14;

Described first coupler 8 sends into the first frequency multiplication selected cell 7 for the coupling unit signal that transmits from the first test port 12;

Described second coupler 10 sends into A receiver 5 for the incoming signal coupling unit signal from the first test port 12;

Described 3rd coupler 16 sends into the second frequency multiplication selected cell 13 for the coupling unit signal that transmits from the second test port 19;

Described 4th coupler 14 sends into B receiver 6 for the incoming signal coupling unit signal from the second test port 19;

Described down-conversion receiver forms primarily of frequency mixing module, intermediate frequency conditioning module, A/D modular converter and DSP vectors calculation module;

Described load comprises the first load 9 and the second load 17;

Described frequency reference module 1, produce a signal source 101 and one for providing the local vibration source 102 of local oscillation signal for down-conversion receiver, described signal source is divided into two-way through 101 by the first selector switch 15, wherein a road is loaded on the first test port 12 through the first coupler 8, second selector switch 11, second coupler 10, and another road is loaded on the second test port 19 through the 3rd coupler 17, the 3rd selector switch 18, the 4th coupler 14; Described first coupler 8 sends into the first frequency multiplication selected cell 7 from the coupling unit signal that transmits of the first test port 12; Described second coupler 10 sends into A receiver 5 from the incoming signal coupling unit signal of the first test port 12; Described 3rd coupler 16 sends into the second frequency multiplication selected cell 13 from the coupling unit signal that transmits of the second test port 19; Described 4th coupler 14 sends into B receiver 6 from the incoming signal coupling unit signal of the second test port 19; Enter local oscillation signal that the signal in R1 receiver 3, R2 receiver 4, A receiver 5 and B receiver 6 produces with local vibration source 102 respectively to carry out fundamental wave mixing and export intermediate-freuqncy signal, described intermediate-freuqncy signal is carried out entering A/D modular converter after intermediate frequency conditioning through intermediate frequency conditioning module and is carried out sampling, changing, enter DSP vectors calculation module afterwards, I/Q decomposition and filtering are carried out to digitized intermediate frequency signal, extract amplitude information and the phase information of measured piece 15, and send to computer module 2 to carry out showing and control.

Embodiment 2:

On the basis of above-described embodiment, the invention provides a kind of easy harmonic nests parameter test method, calibration is had to pass through before test, first down-conversion receiver calibration is carried out, calibration steps is the interpolation using power meter test real output and down-conversion receiver received power, carries out phenomenon compensation; Load matched, source coupling, isolation equal error under its secondary calibration primary condition, open circuit device, short-circuiting device, load, the straight-through SOLT of use method are calibrated, SOLT method can use for reference existing universal method, finally also need the phase alignment carrying out frequency multiplication selected cell, for providing phase reference, the phase alignment (as shown in Figure 2) of frequency multiplication selected cell, wherein, carries out as follows:

Step 1: be connected by cable between the first test port with the second test port;

Step 2: the first selector switch gating first test port, the second selector switch gating signal source, the 3rd selector switch gating second load, test positive error;

Step 3: the first frequency multiplication selected cell is selected straight-through, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is f ₁-f _iF, read R1 receiver phase

Step 4: the first frequency multiplication selected cell selects 2 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 2f ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^2=\∠{\mathrm{\θ}}_1^2-2\∠{\mathrm{\θ}}_1^1;$

Step 5: the first frequency multiplication selected cell selects 3 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 3f ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^3=\∠{\mathrm{\θ}}_1^2-3\∠{\mathrm{\θ}}_1^1;$

Step 6: the first frequency multiplication selected cell selects N frequency multiplication, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is Nf ₁-f _iF, read R1 receiver phase error is ${\mathrm{\Δ\θ}}_1^N={\mathrm{\θ}}_1^2-N\∠{\mathrm{\θ}}_1^1;$

Step 7: change signal source frequency is f ₂, f ₃..., f _n, repeat step 3-step 5, test forward 2 multiple frequency phase error 3 multiple frequency phase errors and N multiple frequency phase error

Step 8: switch 1 gating port 2, the load of switch 2 gating first, switch 3 gating signal source, repeats step 3-step 6 and tests reverse 2 multiple frequency phase errors 3 multiple frequency phase errors and N multiple frequency phase error

After frequency multiplication selected cell phase alignment, carry out the parameter testing of harmonic nests, parameter test method (as shown in Figure 3), respond for the N subharmonic testing the first test port and the second test port two-port network, wherein, comprise the steps:

Step 1: for testing the linear response of two-port network; Signal source frequency is made to be f ₁, f ₂..., f _n, intermediate frequency exports as f _iF, so local vibration source is f _iO=f ₁-f _iF, f ₂-f _iF..., f _n-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell are selected straight-through, use general SOLT method calibrated tester, the linear response of test two-port network; The double-port network parameter of measured piece based on black-box model (as shown in Figure 4) is tried to achieve according to R1, R2 receiver and A, B receiver, a1 represents the incoming signal of the first test port, b1 represents the reflected signal of the first test port, a2 represents the incoming signal of the second test port, b2 represents the reflected signal of the second test port, R1 receiver represents a1 ripple during a2=0, and R2 receiver represents a2 ripple during a1=0, and A, B receiver detects b1 ripple and b2 ripple;

Step 2: for testing the second harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=2*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 2 frequencys multiplication, the second harmonic response of test two-port network; Two frequencys multiplication of a1 ripple when R1 receiver represents a2=0, two frequencys multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the second harmonic of b1 and b2 ripple, and test phase result is with the second harmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 3: for testing the third harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=3*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 3 frequencys multiplication, the third harmonic response of test two-port network; The frequency tripling of a1 ripple when R1 receiver represents a2=0, the frequency tripling of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the triple-frequency harmonics of b1 and b2 ripple, and test phase result is with the triple-frequency harmonics amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 4: for testing the N subharmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=N*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select N frequency multiplication, the N subharmonic response of test two-port network; The N frequency multiplication of a1 ripple when R1 receiver represents a2=0, the N frequency multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the N subharmonic of b1 and b2 ripple, and test phase result is with the N subharmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 5: test result is used nonlinear scattering function s-matrix to represent, [b]=[S] [a].

Described frequency multiplication selected cell is N frequency multiplication selector channel, and N gets positive integer.

Make the subscript of a, b ripple represent harmonic order, subscript represents port numbers, and the nonlinear network parametric form of 3 subharmonic of two-port network can be expressed as:

$\left[\begin{array}{c}{b}_1^1\\ b_1^2\\ b_1^3\\ b_2^1\\ b_2^2\\ b_2^3\end{array}\right]=\left[\begin{array}{cccccc}{S}_{11}^{11}& 0& 0& S_{12}^{11}& 0& 0\\ 0& S_{11}^{22}& 0& 0& S_{12}^{22}& 0\\ 0& 0& S_{11}^{33}& 0& 0& S_{12}^{33}\\ S_{21}^{11}& 0& 0& S_{22}^{11}& 0& 0\\ 0& S_{21}^{22}& 0& 0& S_{22}^{22}& 0\\ 0& 0& S_{21}^{33}& 0& 0& S_{22}^{33}\end{array}\right]\left[\begin{array}{c}{a}_1^1\\ a_1^2\\ a_1^3\\ a_2^1\\ a_2^2\\ a_2^3\end{array}\right].$

A kind of easy harmonic nests parameter test device of the present invention and method, reasonable in design, structure is simple, with low cost, frequency multiplication selected cell is used to realize the straight-through of signal, two frequencys multiplication, frequency tripling is to the selection of N frequency multiplication, the excitation of frequency multiplication selected cell uses input signal instead of frequency reference signal, do not need interpolation algorithm, phase alignment is simple, efficiently solve existing harmonic nests parameter testing cost high, calibration and test process loaded down with trivial details, need the problem that the phase alignment of introducing numerical value interpolation algorithm and dressing generator is very difficult, there is good promotional value.

Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned citing, and the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.

Claims (3)

1. an easy harmonic nests parameter test device, is characterized in that: comprise frequency reference module, selector switch, test port, coupler, frequency multiplication selected cell, down-conversion receiver, computer module and load;

Described selector switch, comprises the first selector switch, the second selector switch and the 3rd selector switch;

Described test port, comprises the first test port and the second test port;

Described frequency multiplication selected cell, comprises the first frequency multiplication selected cell and the second frequency multiplication selected cell, for the selection of straight-through, two frequencys multiplication, the frequency tripling to N frequency multiplication that realize signal;

Described down-conversion receiver, comprise the R1 receiver of the outgoing wave for detecting the first test port, for detect the outgoing wave of the second test port R2 receiver, for detecting the A receiver of the incident wave of the first test port and the B receiver for the incident wave that detects the second test port;

Described coupler, comprises the first coupler, the second coupler, the 3rd coupler and the 4th coupler;

Described first coupler is used for sending into the first frequency multiplication selected cell from the coupling unit signal that transmits of the first test port;

Described second coupler is used for sending into A receiver from the incoming signal coupling unit signal of the first test port;

Described 3rd coupler is used for sending into the second frequency multiplication selected cell from the coupling unit signal that transmits of the second test port;

Described 4th coupler is used for sending into B receiver from the incoming signal coupling unit signal of the second test port;

Described down-conversion receiver forms primarily of frequency mixing module, intermediate frequency conditioning module, A/D modular converter and DSP vectors calculation module;

Described load comprises the first load and the second load;

Described frequency reference module, produces a signal source and one for providing the local vibration source of local oscillation signal for down-conversion receiver; Described signal source is divided into two-way via the first selector switch, wherein a road is loaded on the first test port through the first coupler, the second selector switch, the second coupler, and another road is loaded on the second test port through the 3rd coupler, the 3rd selector switch, the 4th coupler; Described first coupler sends into the first frequency multiplication selected cell from the coupling unit signal that transmits of the first test port; Described second coupler sends into A receiver from the incoming signal coupling unit signal of the first test port; Described 3rd coupler sends into the second frequency multiplication selected cell from the coupling unit signal that transmits of the second test port; Described 4th coupler sends into B receiver from the incoming signal coupling unit signal of the second test port; Enter local oscillation signal that the signal in R1 receiver, R2 receiver, A receiver and B receiver produces with local vibration source respectively to carry out fundamental wave mixing and export intermediate-freuqncy signal, described intermediate-freuqncy signal is carried out entering A/D modular converter after intermediate frequency conditioning through intermediate frequency conditioning module and is carried out sampling, changing, enter DSP vectors calculation module afterwards, I/Q decomposition and filtering are carried out to digitized intermediate frequency signal, extract amplitude information and the phase information of measured piece, and send to computer module to carry out showing and control.

2. an easy harmonic nests parameter test method, is characterized in that: the phase alignment first carrying out frequency multiplication selected cell before test, and adopt a kind of easy harmonic nests parameter test device as claimed in claim 1, calibration steps carries out as follows:

Step 1: be connected by cable between the first test port with the second test port;

Step 2: the first selector switch gating first test port, the second selector switch gating signal source, the 3rd selector switch gating second load, test positive error;

Step 3: the first frequency multiplication selected cell is selected straight-through, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is f ₁-f _iF, read R1 receiver phase

Step 4: the first frequency multiplication selected cell selects 2 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 2f ₁-f _iF, read R1 receiver phase error is

Step 5: the first frequency multiplication selected cell selects 3 frequencys multiplication, signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is 3f ₁-f _iF, read R1 receiver phase error is

Step 6: the first frequency multiplication selected cell selects N frequency multiplication, and signal source frequency is f ₁, intermediate frequency exports as f _iF, local vibration source is Nf ₁-f _iF, read R1 receiver phase error is

Step 7: change signal source frequency is f ₂, f ₃..., f _n, repeat step 3-step 5, test forward 2 multiple frequency phase error 3 multiple frequency phase errors and N multiple frequency phase error

Step 8: switch 1 gating port 2, the load of switch 2 gating first, switch 3 gating signal source, repeats step 3-step 6 and tests reverse 2 multiple frequency phase errors 3 multiple frequency phase errors and N multiple frequency phase error

After the phase alignment of frequency multiplication selected cell, carry out the parameter testing of harmonic nests, method of testing comprises the steps:

Step 1: for testing the linear response of two-port network; Signal source frequency is made to be f ₁, f ₂..., f _n, intermediate frequency exports as f _iF, so local vibration source is f _iO=f ₁-f _iF, f ₂-f _iF..., f _n-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell are selected straight-through, the linear response of test two-port network; Try to achieve the double-port network parameter of measured piece based on black-box model according to R1, R2 receiver and A, B receiver, R1 receiver represents a1 ripple during a2=0, and R2 receiver represents a2 ripple during a1=0, and A, B receiver detects b1 and b2 ripple;

Step 2: for testing the second harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=2*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 2 frequencys multiplication, the second harmonic response of test two-port network; Two frequencys multiplication of a1 ripple when R1 receiver represents a2=0, two frequencys multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the second harmonic of b1 and b2 ripple, and test phase result is with the second harmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 3: for testing the third harmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=3*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select 3 frequencys multiplication, the third harmonic response of test two-port network; The frequency tripling of a1 ripple when R1 receiver represents a2=0, the frequency tripling of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the triple-frequency harmonics of b1 and b2 ripple, and test phase result is with the triple-frequency harmonics amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 4: for testing the N subharmonic response of two-port network; Signal source frequency is made to be f _rFtime, make local frequency be f _iO=N*f _rF-f _iF, the first frequency multiplication selected cell and the second frequency multiplication selected cell select N frequency multiplication, the N subharmonic response of test two-port network; The N frequency multiplication of a1 ripple when R1 receiver represents a2=0, the N frequency multiplication of a2 ripple when R2 receiver represents a1=0, if phase place is respectively with a, B receiver detects the N subharmonic of b1 and b2 ripple, and test phase result is with the N subharmonic amplitude that b1 and b2 comprises is A, B receiver reading, and phase place is correct formula is selected according to test definition;

Step 5: test result is used nonlinear scattering function s-matrix to represent, [b]=[S] [a].

3. the easy harmonic nests parameter test device of one according to claim 1, is characterized in that: described frequency multiplication selected cell is N frequency multiplication selector channel, and N gets positive integer.