CN112255462A - Directionality improving device and method for network analyzer and network analyzer - Google Patents
Directionality improving device and method for network analyzer and network analyzer Download PDFInfo
- Publication number
- CN112255462A CN112255462A CN202011523620.5A CN202011523620A CN112255462A CN 112255462 A CN112255462 A CN 112255462A CN 202011523620 A CN202011523620 A CN 202011523620A CN 112255462 A CN112255462 A CN 112255462A
- Authority
- CN
- China
- Prior art keywords
- detection value
- directional coupler
- port
- directivity
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/04—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
- G01R27/06—Measuring reflection coefficients; Measuring standing-wave ratio
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
A directivity enhancing method for a network analyzer, the network analyzer including a directional coupler, the directivity enhancing method comprising: firstly, connecting an output port of a directional coupler with a matched load, applying excitation and respectively obtaining a detection value R1 and a detection value A1 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler; then connecting an output port of the directional coupler with a device to be tested, applying excitation and respectively obtaining a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler; and acquiring the network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2. The network parameters are obtained by respectively obtaining the detection values of the coupling electric signals of the directional coupler connecting matching load and the device to be tested, the hardware circuit is simple to realize, the algorithm is simple, and better directivity can be realized.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to a directivity improving device and method for a network analyzer and the network analyzer.
Background
A network analyzer is a comprehensive microwave measuring instrument capable of performing scanning measurement in a wide frequency band to determine network parameters. The network analyzer is a microwave network analyzer, is a novel instrument for measuring network parameters, can directly measure complex scattering parameters of active or passive, reversible or irreversible double-port and single-port networks, and gives the amplitude and phase frequency characteristics of each scattering parameter in a frequency scanning mode. The network analyzer can correct errors of the measurement results point by point and convert dozens of other network parameters such as reflection power, return loss, reflection coefficient, standing-wave ratio and the like. The directivity is an important index for measuring the quality of the network analyzer, when the network analyzer measures the reflection characteristic, the coupling end contains a leaked incident excitation signal, the signal and the reflection signal are subjected to vector superposition to cause a reflection index measurement error, and the better the directivity is, the smaller the error is. In the prior art, a directional coupler module with a structure of a balanced bridge and a coaxial line serial magnetic ring is adopted to realize the directivity of the network analyzer, but the module needs to overcome the problems of unbalanced phase at low frequency and directivity deterioration caused by parasitic parameters at high frequency, and has high research and development difficulty, high production cost and high production process requirement.
Disclosure of Invention
The invention mainly solves the technical problem of improving the directivity of the network analyzer.
According to a first aspect, an embodiment provides a directivity improving apparatus for a network analyzer, including a directional coupler, a first detection module, a second detection module, and a signal processor;
the directional coupler comprises an input port, an output port, an input coupling port and an output coupling port; the input port of the directional coupler is used as the power input port of the directivity improving device; the output port of the directional coupler is used as the power output port of the directivity improving device; an input coupling port of the directional coupler is connected with the first detection module, and an output coupling port of the directional coupler is connected with the second detection module; the directional coupler is provided with a matching network between an input port and an output port of the directional coupler, and the matching network is used for ensuring impedance matching between the input port and the output port of the directional coupler; the power input port of the directivity improving device is used for inputting an incident excitation signal, and the power output port of the directivity improving device is used for outputting an emergent excitation signal absorbed by the matching network;
the first detection module is used for detecting a detection value of a coupling electric signal of a power input port of the directivity improving device and outputting the detection value to the signal processor;
the second detection module is used for detecting a coupling electric signal detection value of a power output port of the directivity improving device and outputting the coupling electric signal detection value to the signal processor;
the signal processor is used for acquiring a detection value R1 and a detection value A1 detected by the first detection module and the second detection module respectively when a matched load is connected to a power output port of the directivity improving device; the signal processor is further used for respectively acquiring a detection value R2 and a detection value A2 detected by the first detection module and the second detection module when the power output port of the directivity improving device is connected with a device to be detected; the signal processor is also used for acquiring network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2.
In one embodiment, the directional coupler further comprises a first sampling resistor and a second sampling resistor, the first sampling resistor is connected between the input port and the input coupling port of the directional coupler, and the second sampling resistor is connected between the output port and the output coupling port of the directional coupler.
In one embodiment, the matching network includes at least one coupling resistor.
In one embodiment, the signal processor is further configured to obtain a network parameter of the directivity improving apparatus according to the detection value R1, the detection value R2, the detection value a1, and the detection value a2, and includes:
the network parameters comprise return loss, reflection coefficient and/or standing wave ratio;
the acquisition formula of the return loss comprises the following steps:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^-（RL/20）；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
According to a second aspect, an embodiment provides a network analyzer comprising the directivity enhancing device of the first aspect.
According to a third aspect, an embodiment provides a directivity improving method for a network analyzer, the network analyzer including a directional coupler, the directivity improving method including:
connecting an output port of the directional coupler with a matched load, applying an excitation to an input port of the directional coupler, and respectively acquiring a detection value R1 and a detection value A1 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler;
connecting an output port of the directional coupler with a device to be tested, applying an excitation to an input port of the directional coupler, and respectively obtaining a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler;
and acquiring the network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2.
In one embodiment, the directional coupler includes a matching network connected between the input port and the output port of the directional coupler, a first sampling resistor connected between the input port and the input coupled port of the directional coupler, and a second sampling resistor connected between the output port and the output coupled port of the directional coupler.
In one embodiment, the acquiring the network parameter of the directivity improving apparatus according to the detection value R1, the detection value R2, the detection value a1 and the detection value a2 includes:
the network parameters comprise return loss, reflection coefficient and/or standing wave ratio;
the acquisition formula of the return loss comprises the following steps:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^-（RL/20）；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
In one embodiment, the acquiring the network parameter of the directivity improving apparatus according to the detection value R1, the detection value R2, the detection value a1 and the detection value a2 includes:
the network parameter includes a reflected power, and the obtaining formula of the reflected power includes:
P=A2-R2*K=A2-R2*A1/R1;
wherein K = A1/R1, and P is the reflected power.
According to a fourth aspect, an embodiment provides a computer readable storage medium comprising a program executable by a processor to implement the method according to the third aspect.
According to the directivity improving method for the network analyzer of the above embodiment, first, the output port of the directional coupler is connected with a matching load, excitation is applied, and the detection value R1 and the detection value a1 of the coupling electrical signals of the input coupling port and the output coupling port of the directional coupler are respectively obtained; then connecting an output port of the directional coupler with a device to be tested, applying excitation and respectively obtaining a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler; and acquiring the network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2. Because the network parameters are obtained by respectively obtaining the detection values of the coupling electric signals of the directional coupler connecting matching load and the device to be tested, the hardware circuit is simple to realize, the algorithm is simple, better directivity can be realized, and the cost for researching and developing and producing the network analyzer is reduced.
Drawings
FIG. 1 is a schematic diagram of the structural connections of a directivity enhancing device in one embodiment;
FIG. 2 is a schematic diagram of the structural connections of the directivity enhancing device in one embodiment;
FIG. 3 is a schematic structural connection diagram of a directional coupler according to an embodiment;
fig. 4 is a flow diagram of a directionality increase method for a network analyzer in one embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The directivity is an important index for measuring the quality of the network analyzer, when the network analyzer measures the reflection characteristic, the coupling end contains a leaked incident excitation signal, the signal and the reflection signal are subjected to vector superposition to cause a reflection index measurement error, and the better the directivity is, the smaller the error is. On this basis, good directivity is achieved if we calculate the incident excitation signal contained in the coupling end.
The common method for improving the directivity of the network analyzer is to use a directional coupler module at the radio frequency front end, and the design modes of the directional coupler are two common types:
the first mode is a microstrip coupler designed by utilizing the theory of microstrip coupling;
the second mode is a bridge coupler manufactured by using the principle of a balanced bridge.
However, the minimum operating frequency of the microstrip coupler of the first mode is closely related to the 1/4 wavelength, and therefore, if a band of several tens of megabits or less is to be used, an extremely large size is required, which is certainly unrealistic; the second balanced bridge principle can be used to make ultra-wideband directional coupler, but the designed circuit must achieve very good balanced characteristics to achieve the coupler directivity, and the circuit design and debugging are very difficult. In order to solve the defects in the prior art, the circuit structure which is high in directivity, ultra wide band and low in design difficulty is realized by adopting a mode of combining a circuit and an algorithm.
In an embodiment of the present invention, a directivity improving apparatus includes a directional coupler, a first detection module, a second detection module, and a signal processor. The first detection module and the second detection module are used for detecting detection values of coupling electric signals of the input coupling port and the output coupling port of the directional coupler, and the signal processor acquires network parameters of the directivity improving device according to the detection values when the directional coupler is connected with the matched load and the device to be detected. Because the network parameters are obtained by respectively obtaining the detection values of the coupling electric signals of the directional coupler connecting matching load and the device to be tested, the hardware circuit is simple to realize, the algorithm is simple, better directivity can be realized, and the cost for researching and developing and producing the network analyzer is reduced.
The first embodiment is as follows:
referring to fig. 1, a schematic diagram of a structural connection of a directivity improving apparatus in an embodiment is shown, where the directivity improving apparatus for a network analyzer includes a directional coupler 1, a first detection module 2, a second detection module 3, and a signal processor 3. The directional coupler 1 includes an input port, an output port, an input coupling port, and an output coupling port, the input port of the directional coupler 1 is used as a power input port of the directivity improving device, the output port of the directional coupler 1 is used as a power output port of the directivity improving device, the input coupling port of the directional coupler is connected to the first detection module 2, and the output coupling port of the directional coupler 1 is connected to the second detection module 3. The directional coupler 1 is provided with a matching network between its input port and output port, and the matching network is used to ensure impedance matching between the input port and output port of the directional coupler 1. The power Input port of the directivity improving device is used for inputting an incident excitation signal Input, and the power Output port of the directivity improving device is used for outputting an emergent excitation signal Output absorbed by the matching network.
The first detection module 2 is configured to detect a detection value of the coupling electrical signal at the power input port of the directivity enhancing device, and output the detection value to the signal processor 4. The second detection module 3 is configured to detect a coupling electrical signal detection value at the power output port of the directivity improving apparatus, and output the coupling electrical signal detection value to the signal processor 4. The signal processor 4 is configured to obtain a detection value R1 and a detection value a1 of the first detection module 2 and the second detection module 3, respectively, when a matching load 5 is connected to the power output port of the directivity enhancing apparatus. The matching load 5 completely absorbs the outgoing excitation signal Output from the power Output port of the directivity improving device. The matched load 5 is a standard matched load, and for a common 50 Ω rf system, a load assembly (standard 50 Ω absorption load) in a 50 Ω calibration piece is usually used. The signal processor 4 is a CPU with computing power, which can perform basic data operations and storage on data.
Referring to fig. 2, which is a schematic diagram illustrating a structural connection of the directivity enhancing apparatus in an embodiment, the signal processor 4 is further configured to respectively obtain a detection value R2 and a detection value a2 detected by the first detection module 2 and the second detection module 3 when the power output port of the directivity enhancing apparatus is connected to a device under test 6. The device to be tested 6 completely absorbs the outgoing excitation signal Output from the power Output port of the directivity improving device.
When the output port of the directional coupler is connected with the matched load, the signal of the output port is completely absorbed by the matched load, at this time, the signal in the input coupled port is the detection value R1 of the coupled signal of the input port, and the output coupled port is the detection value A1 of the coupled signal after the input signal passes through the matching network. When the output port of the directional coupler is connected with the device to be tested, the signal of the output port is not completely absorbed, and a reflected signal exists, at the moment,
the signal of the output coupling port is the sum A2 of the coupled signal of the input port after passing through the matching network and the measured value of the coupled signal of the reflected power of the output port, and the signal of the input coupling port is the measured value R2 of the coupled signal of the input port and the coupled signal of the reflected signal of the output port after passing through the matching network. When the loss of the matching network is 3dB, the input coupling port signal comes from the input port signal accounting for 99.9%, and in practical use, it is recommended that the loss of the matching network can be a little larger, so that the signal of the input coupling port can be considered to be completely from the coupling signal of the input port signal. The reflection signal in the output coupling port and the coupling signal from the input port can be obtained, so that the return loss, standing wave ratio and reflection coefficient of the device to be tested are calculated, and the high directivity of the network analyzer is realized. The signal processor 4 is further configured to acquire a network parameter of the directivity improving apparatus based on the detection value R1, the detection value R2, the detection value a1, and the detection value a 2.
Referring to fig. 3, which is a schematic diagram illustrating a structural connection of a directional coupler in an embodiment, a directional coupler 1 includes a matching network 11, a first sampling resistor 12 and a second sampling resistor 13, the first sampling resistor 12 is connected between an input port and an input coupling port of the directional coupler 1, the second sampling resistor 13 is connected between an output port and an output coupling port of the directional coupler 1, and the matching network 11 is connected between the input port and the output port of the directional coupler 1. In one embodiment, the matching network 1 includes at least one coupling resistor.
In one embodiment, the network parameters include return loss, reflection coefficient, and/or standing wave ratio. The acquisition formula of the return loss comprises the following steps:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^-（RL/20）；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
In one embodiment, the present application further discloses a network analyzer, which includes the directivity improving device as described above.
In an embodiment of the present application, a directivity improving apparatus includes a directional coupler, a first detection module, a second detection module, and a signal processor. The first detection module and the second detection module are used for detecting detection values of coupling electric signals of the input coupling port and the output coupling port of the directional coupler, and the signal processor acquires network parameters of the directivity improving device according to the detection values when the directional coupler is connected with the matched load and the device to be detected. Because the network parameters are obtained by respectively obtaining the detection values of the coupling electric signals of the directional coupler connecting matching load and the device to be tested, the hardware circuit is simple to realize, the algorithm is simple, better directivity can be realized, and the cost for researching and developing and producing the network analyzer is reduced.
Example two:
referring to fig. 4, a flow chart of an embodiment of a method for improving directivity of a network analyzer is shown, where the network analyzer includes a directional coupler, the directional coupler includes a matching network, a first sampling resistor, and a second sampling resistor, the matching network is connected between an input port and an output port of the directional coupler, the first sampling resistor is connected between the input port and an input coupling port of the directional coupler, and the second sampling resistor is connected between the output port and an output coupling port of the directional coupler. The directional coupler 1 outputs most of the incident excitation signal Input inputted from the Input port from the output port, and the matching network between the Input port and the output port may be any device, and the typical circuit is several matching resistors to ensure impedance matching between the Input port and the output port, and the loss of this matching network is IL. The input coupling port is close to the input port, and at the input side of the matching network, the coupling can be completed by using a resistor, and the coupling degree (the coupling degree refers to the ratio of the output power of the input coupling port to the input power of the input port) can be adjusted according to the value of the first sampling resistor. The output coupling port is close to the output port, the coupling can be completed by using a resistor in typical application, and the coupling degree can be adjusted according to the value of the second sampling resistor. The directivity improving method includes:
an excitation is applied to the matched load, step 110.
The output port of the directional coupler is connected to a matched load, and a stimulus is applied to the input port of the directional coupler.
The first detection module and the second detection module respectively acquire a detection value R1 and a detection value A1 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler and send the detection values to the signal processor.
The formula for obtaining the signal ratio K comprises:
K=A1/R1；
at step 140, a stimulus is applied to the dut.
The output port of the directional coupler is connected to the device under test and a stimulus is applied to the input port of the directional coupler.
At step 150, signals A2 and R2 are acquired.
The first detection module and the second detection module respectively acquire a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler and send the detection values to the signal processor.
The signal processor acquires the network parameter of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2. The network parameters comprise reflected power, return loss, reflection coefficient and/or standing wave ratio;
the formula for obtaining the reflected power comprises:
P=A2-R2*K=A2-R2*A1/R1;
wherein K = A1/R1, and P is the reflected power.
The acquisition formula of the return loss comprises:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^-（RL/20）；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
In the embodiment of the application, the directional coupler and the software algorithm are adopted, the directional coupler is not required to have directivity, the software algorithm is simple, the theoretical directivity is infinite through simple calculation compensation, and the network analyzer can measure the extremely small return loss, the reflection coefficient and the standing-wave ratio. This method can be applied to any reflectometry system. The directivity improving device has simple hardware circuit and concise software algorithm, can realize better directivity through the simple algorithm, and has low research and development and production cost and slightly less realization difficulty.
In this embodiment, the method for improving the directivity includes connecting an output port of the directional coupler to a matching load, applying excitation, and obtaining a detection value R1 and a detection value a1 of coupling electrical signals of an input coupling port and an output coupling port of the directional coupler, respectively; then connecting an output port of the directional coupler with a device to be tested, applying excitation and respectively obtaining a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler; and acquiring the network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2. Because the network parameters are obtained by respectively obtaining the detection values of the coupling electric signals of the directional coupler connecting matching load and the device to be tested, the hardware circuit is simple to realize, the algorithm is simple, better directivity can be realized, and the cost for researching and developing and producing the network analyzer is reduced.
Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments may be implemented by hardware, or may be implemented by computer programs. When all or part of the functions of the above embodiments are implemented by a computer program, the program may be stored in a computer-readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc., and the program is executed by a computer to realize the above functions. For example, the program may be stored in a memory of the device, and when the program in the memory is executed by the processor, all or part of the functions described above may be implemented. In addition, when all or part of the functions in the above embodiments are implemented by a computer program, the program may be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk, or a removable hard disk, and may be downloaded or copied to a memory of a local device, or may be version-updated in a system of the local device, and when the program in the memory is executed by a processor, all or part of the functions in the above embodiments may be implemented.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A directivity improving device for a network analyzer is characterized by comprising a directional coupler, a first detection module, a second detection module and a signal processor;
the directional coupler comprises an input port, an output port, an input coupling port and an output coupling port; the input port of the directional coupler is used as the power input port of the directivity improving device; the output port of the directional coupler is used as the power output port of the directivity improving device; an input coupling port of the directional coupler is connected with the first detection module, and an output coupling port of the directional coupler is connected with the second detection module; the directional coupler is provided with a matching network between an input port and an output port of the directional coupler, and the matching network is used for ensuring impedance matching between the input port and the output port of the directional coupler; the power input port of the directivity improving device is used for inputting an incident excitation signal, and the power output port of the directivity improving device is used for outputting an emergent excitation signal absorbed by the matching network;
the first detection module is used for detecting a detection value of a coupling electric signal of a power input port of the directivity improving device and outputting the detection value to the signal processor;
the second detection module is used for detecting a coupling electric signal detection value of a power output port of the directivity improving device and outputting the coupling electric signal detection value to the signal processor;
the signal processor is used for acquiring a detection value R1 and a detection value A1 detected by the first detection module and the second detection module respectively when a matched load is connected to a power output port of the directivity improving device; the signal processor is further used for respectively acquiring a detection value R2 and a detection value A2 detected by the first detection module and the second detection module when the power output port of the directivity improving device is connected with a device to be detected; the signal processor is also used for acquiring network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2.
2. The directivity enhancing apparatus of claim 1, wherein the directional coupler further comprises a first sampling resistor and a second sampling resistor, the first sampling resistor being connected between the input port and the input coupled port of the directional coupler, the second sampling resistor being connected between the output port and the output coupled port of the directional coupler.
3. The directivity enhancing apparatus of claim 2, wherein the matching network includes at least one coupling resistor.
4. The directivity enhancing device of claim 2, wherein the signal processor is further configured to obtain network parameters of the directivity enhancing device based on the detection value R1, the detection value R2, the detection value a1, and the detection value a2, including:
the network parameters comprise return loss, reflection coefficient and/or standing wave ratio;
the acquisition formula of the return loss comprises the following steps:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^ -(RL/20)；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
5. A network analyzer, characterized by comprising the directivity enhancing device according to any one of claims 1 to 4.
6. A directivity enhancing method for a network analyzer, wherein the network analyzer includes a directional coupler, the directivity enhancing method comprising:
connecting an output port of the directional coupler with a matched load, applying an excitation to an input port of the directional coupler, and respectively acquiring a detection value R1 and a detection value A1 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler;
connecting an output port of the directional coupler with a device to be tested, applying an excitation to an input port of the directional coupler, and respectively obtaining a detection value R2 and a detection value A2 of coupling electric signals of an input coupling port and an output coupling port of the directional coupler;
and acquiring the network parameters of the directivity improving device according to the detection value R1, the detection value R2, the detection value A1 and the detection value A2.
7. The directivity improving method according to claim 6, characterized in that the directional coupler includes a matching network, a first sampling resistor, and a second sampling resistor, the matching network is connected between the input port and the output port of the directional coupler, the first sampling resistor is connected between the input port and the input coupling port of the directional coupler, and the second sampling resistor is connected between the output port and the output coupling port of the directional coupler.
8. The directivity improving method according to claim 6, wherein the acquiring the network parameter of the directivity improving apparatus based on the detection value R1, the detection value R2, the detection value a1, and the detection value a2 includes:
the network parameters comprise return loss, reflection coefficient and/or standing wave ratio;
the acquisition formula of the return loss comprises the following steps:
RL=10*Lg[R2/(A2-R2*A1/R1)];
the obtaining formula of the reflection coefficient comprises:
Г=10^ -(RL/20)；
the standing-wave ratio obtaining formula comprises:
VSWR=（1+Г）/（1-Г）；
wherein RL is return loss, Γ is reflection coefficient, and VSWR is standing wave ratio.
9. The directivity improving method according to claim 6, wherein the acquiring the network parameter of the directivity improving apparatus based on the detection value R1, the detection value R2, the detection value a1, and the detection value a2 includes:
the network parameter includes a reflected power, and the obtaining formula of the reflected power includes:
P=A2-R2*K=A2-R2*A1/R1;
wherein K = A1/R1, and P is the reflected power.
10. A computer-readable storage medium, characterized by comprising a program executable by a processor to implement the method of any one of claims 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523620.5A CN112255462B (en) | 2020-12-22 | 2020-12-22 | Directionality improving device and method for network analyzer and network analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523620.5A CN112255462B (en) | 2020-12-22 | 2020-12-22 | Directionality improving device and method for network analyzer and network analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112255462A true CN112255462A (en) | 2021-01-22 |
| CN112255462B CN112255462B (en) | 2021-03-16 |
Family
ID=74225865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011523620.5A Active CN112255462B (en) | 2020-12-22 | 2020-12-22 | Directionality improving device and method for network analyzer and network analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112255462B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904085A (en) * | 2021-09-13 | 2022-01-07 | 大富科技(安徽)股份有限公司 | Directional coupling circuit, directional coupler debugging circuit and debugging method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100161265A1 (en) * | 2008-12-19 | 2010-06-24 | Rohde & Schwarz Gmbh & Co. Kg | 9-term calibration method for network analyzers |
| CN102324990A (en) * | 2011-08-11 | 2012-01-18 | 顾晓龙 | Vector reflection coefficient detection circuit only using amplitude detector and detection method thereof |
| CN108614152A (en) * | 2016-12-09 | 2018-10-02 | 中国科学院苏州纳米技术与纳米仿生研究所 | The measurement method of the input end face power of load balance factor system and its measured piece |
| CN110118895A (en) * | 2019-05-24 | 2019-08-13 | 北京无线电计量测试研究所 | It is a kind of for measuring the measurement method and measuring device of source hot reflection coefficient |
| CN110806555A (en) * | 2019-11-14 | 2020-02-18 | 中电科仪器仪表有限公司 | Method for improving reflection parameter measurement capability of through-type power meter |
-
2020
- 2020-12-22 CN CN202011523620.5A patent/CN112255462B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100161265A1 (en) * | 2008-12-19 | 2010-06-24 | Rohde & Schwarz Gmbh & Co. Kg | 9-term calibration method for network analyzers |
| CN102324990A (en) * | 2011-08-11 | 2012-01-18 | 顾晓龙 | Vector reflection coefficient detection circuit only using amplitude detector and detection method thereof |
| CN108614152A (en) * | 2016-12-09 | 2018-10-02 | 中国科学院苏州纳米技术与纳米仿生研究所 | The measurement method of the input end face power of load balance factor system and its measured piece |
| CN110118895A (en) * | 2019-05-24 | 2019-08-13 | 北京无线电计量测试研究所 | It is a kind of for measuring the measurement method and measuring device of source hot reflection coefficient |
| CN110806555A (en) * | 2019-11-14 | 2020-02-18 | 中电科仪器仪表有限公司 | Method for improving reflection parameter measurement capability of through-type power meter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904085A (en) * | 2021-09-13 | 2022-01-07 | 大富科技(安徽)股份有限公司 | Directional coupling circuit, directional coupler debugging circuit and debugging method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112255462B (en) | 2021-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7034548B2 (en) | Balanced device characterization including test system calibration | |
| US20070159182A1 (en) | Circuits to increase VNA measurement bandwidth | |
| CN112394227B (en) | RFID tag antenna impedance testing method | |
| CN109309749A (en) | A kind of line loss calibration method and system | |
| CN103399286A (en) | Measurement calibration method for multi-characteristic impedance network | |
| CN104515907A (en) | Scattering parameter testing system and implementation method thereof | |
| US20090174415A1 (en) | Method for Calibrating a Real-Time Load-Pull System | |
| CN110174634B (en) | Load traction measurement system and measurement method | |
| US11226371B2 (en) | System and method of production testing of impedance of radio frequency circuit incorporated on printed circuit board | |
| US5170126A (en) | Microwave six-port noise parameter analyzer | |
| CN115684780A (en) | Electromagnetic signal measuring method, device, computer equipment and storage medium | |
| CN112255462B (en) | Directionality improving device and method for network analyzer and network analyzer | |
| CN110581741B (en) | Standing wave abnormal position detection method, equipment and medium | |
| L'vov et al. | A novel vector network analyzer using combined multi-port reflectometer | |
| JP4177804B2 (en) | Acquisition of calibration parameters for 3-port devices under test | |
| WO2019033616A1 (en) | Time domain reflective single end test apparatus and method for radio frequency co-axial coupler | |
| Dudkiewicz | Vector-receiver load pull measurements | |
| US20150081238A1 (en) | RF Signal Meter | |
| van den Biggelaar et al. | Assessment of a contactless characterization method for integrated antennas | |
| US6982561B2 (en) | Scattering parameter travelling-wave magnitude calibration system and method | |
| CN114137389B (en) | Method, device, terminal and storage medium for determining S parameter phase of microwave probe | |
| US10938490B1 (en) | Calibration method for coupler-tuner assembly | |
| CN112798862A (en) | Network analyzer measuring device and system | |
| Wang et al. | A Simple Wideband Differential Magnetic Probe Loaded with Out-of-phase Balun and Parasitic Loop | |
| CN110531297B (en) | Terahertz probe transient characteristic calibration method and system based on single-position model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |