CN220570539U - Radio frequency power test box and radio frequency automatic test system - Google Patents

Radio frequency power test box and radio frequency automatic test system Download PDF

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Publication number
CN220570539U
CN220570539U CN202322242648.7U CN202322242648U CN220570539U CN 220570539 U CN220570539 U CN 220570539U CN 202322242648 U CN202322242648 U CN 202322242648U CN 220570539 U CN220570539 U CN 220570539U
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China
Prior art keywords
coupler
electrically connected
power
radio frequency
signal
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CN202322242648.7U
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Chinese (zh)
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欧阳彤欣
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Suzhou Meixing Technology Co ltd
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Suzhou Meixing Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The utility model belongs to the technical field of radio frequency testing, and particularly relates to a radio frequency power testing box and a radio frequency automatic testing system; the radio frequency power test box is used for testing the power of a tested piece and comprises an input power test module, wherein the input power test module comprises a first coupler and a first power meter; the first end of the first coupler is used for being electrically connected with the signal transmitting end, the second end of the first coupler is electrically connected with the first power meter, and the third end of the first coupler is used for being electrically connected with the input end of the tested piece through the first connecting piece; the signal transmitting end transmits signals; after the first power meter tests the power of the second end signal of the first coupler, the power of the third end signal of the first coupler is calculated according to the measured value, and the loss of the first connecting piece is added, so that the real input power of the tested piece is obtained; the measuring precision is high, and the function of protecting the first power meter can be achieved.

Description

Radio frequency power test box and radio frequency automatic test system
Technical Field
The utility model belongs to the technical field of radio frequency testing, and particularly relates to a radio frequency power testing box and a radio frequency automatic testing system.
Background
The radio frequency device is the core of wireless connection, and the radio frequency device is necessary wherever wireless connection is needed. The number of future global wireless connections will increase by a factor in the promotion of internet of things applications.
Linearity is one of the most important parameters for judging the dynamic performance of the radio frequency device, and the higher the linearity is, the better the product quality is. It is a key technical index for judging whether the device is qualified or not. And the compression point is an important reference index for judging linearity. The compression point marks the input power point of the device from the linear region into the nonlinear region, which determines the maximum linear range of the device. The higher the compression point, the wider the linear range and the better the linearity.
The compression point test generally adopts a power analysis method, and mainly comprises the steps of inputting a signal with a certain frequency into a device, gradually increasing the input power, simultaneously measuring the output power, and recording the relation curve of the input power and the output power. Finding out the point of suddenly decreasing output power on the curve, and the rated value of the corresponding input power is the compression point.
However, the existing test scheme has low test precision and low test efficiency because the test instrument needs to be manually detached.
Disclosure of Invention
The utility model aims to provide a radio frequency power test box and a radio frequency automatic test system which are high in test efficiency and high in test precision.
In order to achieve the above object, the present utility model provides a radio frequency power test box for testing power of a tested piece, the radio frequency power test box including an input power test module, the input power test module including a first coupler and a first power meter;
the first end of the first coupler is used for being electrically connected with the signal transmitting end, the second end of the first coupler is electrically connected with the first power meter, and the third end of the first coupler is used for being electrically connected with the input end of the tested piece through a first connecting piece;
the signal transmitting end transmits signals; and after the first power meter tests the power of the second end signal of the first coupler, calculating the power of the third end signal of the first coupler according to the measured value, and adding the loss of the first connecting piece to obtain the real input power of the tested piece.
In some embodiments, the radio frequency power test box further comprises an output power test module comprising a second coupler and a second power meter;
the first end of the second coupler is used for being electrically connected with the output end of the tested piece through a second connecting piece, the second end of the second coupler is electrically connected with the second power meter, and the third end of the coupler is used for being electrically connected with the signal receiving end;
and after the second power meter tests the power of the second end signal of the second coupler, calculating the power of the first end signal of the second coupler according to the measured value, and subtracting the loss of the second connecting piece, thereby obtaining the real output power of the tested piece.
In some embodiments, the radio frequency power test box further comprises:
a case;
the first interface is arranged on the box body, one end of the first interface is electrically connected with the first end of the first coupler, and the other end of the first interface is electrically connected with the signal transmitting end;
the second interface is arranged on the box body, one end of the second interface is electrically connected with the third end of the first coupler, and the other end of the second interface is electrically connected with the input end of the tested piece through the first connecting piece;
the third interface is arranged on the box body, one end of the third interface is electrically connected with the first end of the second coupler, and the other end of the third interface is electrically connected with the output end of the tested piece through the second connecting piece; and
and the fourth interface is arranged on the box body, one end of the fourth interface is electrically connected with the third end of the second coupler, and the other end of the fourth interface is electrically connected with the signal receiving end.
The utility model also provides a radio frequency automatic test system for automatically testing the radio frequency performance of the tested piece, the radio frequency automatic test system comprises:
the signal transmitting terminal is used for transmitting signals;
the radio frequency power test box is the radio frequency power test box described in any one of the above embodiments;
a signal receiving end for receiving signals; and
the function change-over switch box is respectively and electrically connected with the signal transmitting end, the radio frequency power testing box, the signal receiving end and the tested piece, and the function change-over switch box respectively controls the signal transmitting end, the signal receiving end, the radio frequency power testing box and the tested piece to be connected and form a signal loop.
In some embodiments, the function switching box includes:
the first end of the first instrument selection switch is electrically connected with the signal transmitting end;
a first option input selector switch, a first end of the first option input selector switch being electrically connected to a second end of the first meter selector switch, a second end of the first option input selector switch being electrically connected to a first end of the first coupler;
the first end of the first element output selection switch is electrically connected with the third end of the first coupler, and the second end of the first element output selection switch is used for being electrically connected with the input end of the tested element;
the first end of the second instrument selection switch is electrically connected with the signal receiving end;
a second option input selector switch, a first end of the second option input selector switch being electrically connected to a second end of the second meter selector switch, a second end of the second option input selector switch being electrically connected to a third end of the second coupler;
the first end of the second element output selection switch is electrically connected with the first end of the second coupler, and the second end of the second element output selection switch is also used for being electrically connected with the output end of the tested element.
In some embodiments, the first power meter is connected to the signal transmitting end through a controller, and/or the signal transmitting end is a signal source.
In some embodiments, the second power meter is connected to the controller, and/or the signal receiving end is a spectrometer.
In some embodiments, the first connector comprises a first cable and the second connector comprises a second cable.
In some embodiments, the first connector further comprises a first rf connector adapter and the second connector further comprises a second rf connector adapter.
In some embodiments, the signal transmitting end is a signal generator port of a vector network analyzer, and the signal receiving end is an observation receiver port of the vector network analyzer.
Compared with the prior art, the utility model has the beneficial effects that:
the radio frequency power test box provided by the application is provided with the first coupler, so that the transmission of signals is not affected, and the main path signals can be copied in proportion according to the coupling coefficient so as to be used for the first power meter to measure the power of the first end. And the first power meter calculates the power of the third end according to the coupling characteristic of the first coupler, so as to realize the transfer of the measuring end. The loss of the first connecting piece between the third end of the first coupler and the input end of the tested piece is easy to calculate, and the real input power of the tested piece is obtained through calibration by adding the loss of the first connecting piece, so that the measurement accuracy is high. And the signal of the second end of the first coupler is a part of the signal of the first end, so that the power of the signal of the second end is lower, and the function of protecting the first power meter can be further achieved.
Drawings
FIG. 1 is a schematic circuit diagram of a RF power test box according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a RF power test box according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an automatic RF testing system according to an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of an automatic RF test system according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a first meter selection switch according to an embodiment of the present application.
In the figure:
100. a radio frequency power test box; 10. an input power test module; 11. a first coupler; c11, a first end of the first coupler; c12, the second end of the first coupler; c13, the third end of the first coupler; 12. a first power meter; 20. an output power test module; 21. a second coupler; c21, the first end of the second coupler; c22, a second end of the second coupler; c23, the third end of the second coupler; 22. a second power meter; 200. a measured piece; 201. a first connector; 202. a second connector; 300. a signal transmitting terminal; 400. a signal receiving end; an IN PUT, first interface; DUT IN, second interface; a DUT OUT, a third interface; OUT PUT, fourth interface; 500. a function switching box; j1, a first instrument selection switch; j11, the first end of the first meter selector switch; j12, a second end of the first instrument selection switch; j2, inputting a first option into a selection switch; j21, a first end of a first option input selection switch; j22, a second end of the first option input selection switch; j3, outputting a selection switch by the first option; j31, a first end of the first option output selection switch; j32, the second end of the first option output selector switch; j4, a second instrument selection switch; j41, a first end of a second meter selection switch; j42, the second end of the second meter selection switch; j5, inputting a second option into a selection switch; j51, the first end of the second option input selection switch; j52, a second end of the second option input selection switch; j6, outputting a selection switch by the second option;
j61, the first end of the second option output selection switch; j62, outputting a second end of the selection switch by a second option; 600. and a controller.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Fig. 1 is a schematic circuit diagram of a radio frequency power test box according to an embodiment of the present application.
As shown in fig. 1, the present embodiment provides a radio frequency power test box 100 for testing power of a tested piece 200 (Device Under Test, DUT), and the radio frequency power test box 100 includes an input power test module 10.
The input power testing module 10 includes a first coupler 11 and a first power meter 12, a first end C11 of the first coupler 11 is electrically connected to the signal transmitting end 300, a second end C12 of the first coupler 11 is electrically connected to the first power meter 12, and a third end C13 of the first coupler 11 is electrically connected to an input end of the tested piece 200 through the first connection piece 201.
The working process of the rf power test box 100 provided in this embodiment is as follows:
the signal transmitting terminal 300 transmits a signal to excite the first terminal C11 of the first coupler 11, and the first coupler 11 couples a signal of a certain proportion (coupling coefficient) at the second terminal C12, and the signal is output from the third terminal C13 of the first coupler 11 and is input to the test piece 200 through the first connection 201 (herein, as will be understood by those skilled in the art, the second terminal C12 and the third terminal C13 are not the same signal according to the operation characteristics of the coupler). After the first power meter 12 measures the power of the second end C12 signal of the first coupler 11, the power P of the third end C13 signal of the first coupler 11 is calculated according to the measured value C13 Plus the loss P of the first connection 201 201 Thereby obtaining the real input power P of the measured piece 200 realin I.e. P realin ＝P C13 +P 201 。
The radio frequency power test box 100 provided in this embodiment is provided with the first coupler 11, which does not affect signal transmission, and can copy the main signal proportionally according to the coupling coefficient for the first power meter 12 to measure the power of the first end C11. The first power meter 12 calculates the power of the third terminal C13 according to the coupling characteristic of the first coupler 11, so as to realize the transfer of the measuring terminal. The loss of the first connecting piece 201 between the third end C13 of the first coupler 11 and the input end of the measured piece 200 is easy to calculate, and the real input power of the measured piece 200 is calibrated by adding the loss of the first connecting piece 201, so that the measurement accuracy is high. And the signal of the second end C12 of the first coupler 11 is a part of the signal of the first end C11, so that the power of the signal of the second end C12 is lower, and the function of protecting the first power meter 12 can be further achieved.
In this embodiment, the radio frequency power test box 100 further includes an output power test module 20, where the output power test module 20 includes a second coupler 21 and a second power meter 22, a first end C21 of the second coupler 21 is electrically connected to the output end of the tested piece 200 through a second connection piece 202, a second end C22 of the second coupler 21 is electrically connected to the second power meter 22, and a third end C23 of the second coupler 21 is electrically connected to the signal receiving end 400.
The working process of the rf power test box 100 provided in this embodiment is as follows:
the signal is output from the output end of the tested piece 200, and after passing through the second connecting piece 202, the first end C21 of the second coupler 21 is excited, the second coupler 21 couples a certain proportion of the signal at the second end C22 according to the coupling coefficient, and the signal is output from the third end C23 of the second coupler 21 (here, as known by those skilled in the art, the second end C22 and the third end C23 are not the same signal according to the working characteristics of the coupler). After the second power meter 22 measures the power of the second end C22 signal of the second coupler 21, the power P of the first end C21 signal of the second coupler 21 is calculated according to the measured value C21 Subtracting the loss P of the second connector 202 202 Thereby obtaining the real output power P of the tested piece 200 realout I.e. P realout ＝P C21 -P 202 。
The radio frequency power test box 100 provided in this embodiment is provided with the output power test module 20, and the second coupler 21 and the second power meter 22 are collocated, so that after the second power meter 22 tests the power of the second end C22 signal of the second coupler 21, the power of the first end C21 signal is calculated according to the coupling characteristic of the second coupler 21, the transfer of the measurement end is realized, the loss of the second connecting piece 202 between the first end C21 of the second coupler 21 and the output end of the tested piece 200 is easy to calculate, the real output power of the tested piece 200 can be obtained by subtracting the loss of the second connecting piece 202, the test precision is high, and the automatic test can be realized without manually disconnecting the instrument. The device can be used for measuring the real input power of the tested piece 200 and the real output power of the tested piece 200, and has high test efficiency.
Fig. 2 is a schematic structural diagram of a radio frequency power test box according to an embodiment of the present application.
As shown in fig. 2, the radio frequency power test box 100 provided in this embodiment further includes:
a case 30;
a first interface IN PUT, which is disposed on the case 30 and has one end electrically connected to the first end C11 of the first coupler 11 and the other end electrically connected to the signal transmitting end 300;
a second interface DUT IN provided on the case 30 and having one end electrically connected to the third end C13 of the first coupler 11 and the other end electrically connected to the input end of the tested piece 200 via the first connection piece 201;
a third interface DUT OUT provided on the case 30 and having one end electrically connected to the first end C21 of the second coupler 21 and the other end electrically connected to the output end of the tested member 200 through the second connecting member 202; and
the fourth interface OUT PUT is disposed on the case 30, and has one end electrically connected to the third end C23 of the second coupler 21 and the other end electrically connected to the signal receiving end 400.
The radio frequency power test box 100 provided in this embodiment can be connected to a test system when needed, performs high-precision test on the input power and the output power of the tested piece 200, and feeds back the input power and the output power to the test system to monitor the power or be used for testing the performance (such as a compression point) of the tested piece 200, is flexible and convenient to assemble and disassemble, and adapts to more test requirements and scenes.
Specifically, IN the present embodiment, the first interface IN PUT, the second interface DUT IN, the third interface DUT OUT, and the fourth interface OUT PUT are N-Type connectors (Type N connectors) or SMA (SubMiniature version A). Those skilled IN the art will readily recognize that IN other embodiments, the first interface IN PUT, the second interface DUT IN, the third interface DUT OUT, and the fourth interface OUT PUT are other types of radio frequency connectors and are within the scope of the present application.
Example 2
Fig. 3 is a schematic diagram of an automatic rf test system according to an embodiment of the present application, which is configured to automatically test the rf performance of a tested piece 200.
As shown in fig. 3, in particular, the radio frequency automatic test system includes:
a signal transmitting terminal 300 for transmitting a signal;
the rf power test box 100 is the rf power test box 100 described in any of the above embodiments;
a signal receiving end 400 for receiving a signal; and
the function switching box 500 is electrically connected with the signal transmitting end 300, the radio frequency power testing box 100, the signal receiving end 400 and the tested piece 200 respectively, the function switching box 500 controls the signal transmitting end 300, the signal receiving end 400, the radio frequency power testing box 100 and the tested piece 200 to be connected and form a signal loop respectively, and the radio frequency power testing box 100 performs high-precision power testing on the tested piece 200.
If the high-precision power test is not needed, the function switching box 500 controls the signal transmitting end 300, the signal receiving end 400 and the tested piece 200 to be connected respectively, and the signal transmitting end 300 transmits signals to the tested piece 200 and then is received by the signal receiving end 400, so that a signal loop is formed to perform the power test on the tested piece 200. Specifically, in this embodiment, the signal transmitting end 300 is a signal source, and the signal receiving end 400 is a spectrometer.
The radio frequency automatic test system provided by the embodiment can freely switch whether to be connected to the radio frequency power test box 100 according to the requirement of whether to perform high-precision power test, and is flexible, convenient and high in test efficiency.
Fig. 4 is a schematic circuit diagram of an automatic radio frequency testing system according to an embodiment of the present application, and fig. 5 is a schematic structural diagram of a first instrument selection switch according to an embodiment of the present application.
Further, as shown in fig. 4, in the present embodiment, the function switching box 500 includes:
referring to fig. 5, a first meter selector switch J1, a first end J11 of the first meter selector switch J1 is electrically connected to the signal transmitting end 300;
a first option input selector switch J2, a first end J21 of the first option input selector switch J2 being electrically connected to a second end J12 of the first meter selector switch J1, a second end J22 of the first option input selector switch J2 being electrically connected to a first end C11 of the first coupler 11;
the first option output selection switch J3, a first end J31 of the first option output selection switch J3 is electrically connected with the third end C13 of the first coupler 11, and a second end J32 of the first option output selection switch J3 is used for being electrically connected with the input end of the tested piece 200;
a second meter selection switch J4, the first end J41 of the second meter selection switch J4 being electrically connected to the signal receiving end 400;
a second option input selection switch J5, a first end J51 of the second option input selection switch J5 being electrically connected to a second end J42 of the second meter selection switch J4, a second end J52 of the second option input selection switch J5 being electrically connected to a third end C23 of the second coupler 21;
the second option output selection switch J6, the first end J61 of the second option output selection switch J6 is electrically connected to the first end C21 of the second coupler 21, and the second end J62 of the second option output selection switch J6 is further electrically connected to the output end of the tested piece 200.
IN this embodiment, the second terminal J22 of the first option input selector J2 is electrically connected to the first terminal C11 of the first coupler 11 through the first interface IN PUT, the first terminal J31 of the first option output selector J3 is electrically connected to the third terminal C13 of the first coupler 11 through the second interface DUT IN, the first terminal J61 of the second option output selector J6 is electrically connected to the first terminal C21 of the second coupler 21 through the third interface DUT OUT, and the second terminal J52 of the second option input selector J5 is electrically connected to the third terminal C23 of the second coupler 21 through the fourth interface OUT PUT.
In this embodiment, the first meter selection switch J1, the first option input selection switch J2, the first option output selection switch J3, the second meter selection switch J4, the second option input selection switch J5, and the second option output selection switch J6 are multiport radio frequency switches.
The working process of the radio frequency automatic test system provided by the embodiment is as follows:
j11, J12, J21, J22, J31, J32, J41, J42, J51, J52, J61 and J62 are closed to form a signal loop. The signal transmitting terminal 300 transmits a signal, the signal is input to the first end C11 of the first coupler 11 through the first instrument selection switch J1, the first option selection input switch J2 and the first interface IN PUT, the signal is output from the third end C13 of the first coupler 11 and then is input from the input end of the tested piece 200 through the second interface DUT IN, the first option output selection switch J3 and the first connecting piece 201, the signal is output from the output end of the tested piece 200 and then is input to the first end C21 of the second coupler 21 through the second connecting piece 202, the second option output selection switch J6 and the third interface DUT OUT, and the signal is received from the third end C23 of the second coupler 21 through the fourth interface OUT PUT, the second option input selection switch J5 and the second instrument selection switch J4, so as to form a signal loop, and high-precision power test is performed.
The radio frequency automatic test system provided in this embodiment is provided with the function switching switch box 500, the function switching switch box 500 is further provided with instrument selection switches (J1 and J4), corresponding test instruments (for example, the signal transmitting end 300 and the signal receiving end 400) can be cut in according to the needs, the test item replacement is simple and convenient, and the option selection input switches (for example, J2 and J5) and the option selection output switches (for example, J3 and J6) are further provided, so that whether the corresponding test instruments are cut in or not can be selected according to the needs, and the radio frequency power test box 100 can be selected flexibly, simply and conveniently.
In this embodiment, the radio frequency automatic test system further includes other test instruments, such as a vector network analyzer VNA P1, VNA P2, an oscilloscope 700, and a noise source 800, so that more test items can be switched, and in practical application, the test efficiency of testing multiple test items on the tested piece 200 can be improved.
In this embodiment, the first power meter 12 is connected to the signal transmitting end 300 through the controller 600, the first power meter 12 sends the measured real input power of the tested piece 200 to the controller 600, and the controller 600 controls the signal transmitting end 300 to adjust the power of the transmitted signal according to the test result, so that the power of the signal at the input end of the tested piece 200 meets the requirement. The radio frequency power test box 100 provided in this embodiment also monitors the power of the input end of the tested piece 200, so that the power of the signal received by the input end of the tested piece 200 is more accurate, which is more beneficial to testing various performances of the tested piece 200.
In this embodiment, the second power meter 22 is connected to the controller 600. In the test item for the compression point, the signal transmitting terminal 300 transmits a signal with adjustable power. While maintaining the frequency of the signal unchanged, the power of the signal is gradually increased (e.g., increased by 3dB each time), the first power meter 12 tests the real input power of the test piece 200 and sends it to the controller 600, and the second power meter 22 tests the real output power of the test piece 200 and sends it to the controller 600. The controller 600 receives a plurality of input and output power values (P realin And P realout ) Fitting an input and output power curve, and finding a first point in the curve, wherein the output power of the first point is reduced by 1dB relative to the previous measuring point, and the input power of the first point is the 1dB compression point. The radio frequency power test box 100 provided in this embodiment tests the input and output power of the tested piece 200 accurately, so that the measurement of the compression point is accurate.
In this embodiment, the signal transmitting terminal 300 is a signal source. Those skilled in the art will readily recognize that, in other embodiments, it is within the scope of the present application that the signal transmitting terminal 300 is a signal generator port of a vector network analyzer.
In this embodiment, the signal receiving end 400 is a spectrometer. Those skilled in the art will readily recognize that in other embodiments, it is within the scope of the present application that the signal receiving end 400 is an observation receiver port of a vector network analyzer.
In this embodiment, the first connector 201 includes a first cable, and ports at two ends of the first cable are respectively matched with the port of the third end C13 of the first coupler 11 and the port Type of the input end of the tested piece 200, for example, all SMA heads (SubMiniature version A) or all N heads (Type Nconnector). The first power meter 12 needs to add the loss of the first cable to obtain the true input power of the measured piece 200 during calibration.
The second connector 202 includes a second cable, and ports at both ends of the second cable are respectively matched with the ports of the output end of the tested piece 200 and the port type of the first end C21 of the second coupler 21. The second power meter 22 needs to subtract the loss of the second cable to obtain the true output power of the measured piece 200 during calibration.
Example 3
In this embodiment, the first connector 201 includes a first cable and a first rf connector adapter. If the port of the third end C13 of the first coupler 11 or the port type of the input end of the tested piece 200 is not matched with the port type of the first cable, the number of the first rf connector adapters is one, for example, the first coupler 11 and the first cable are N heads, and the tested piece 200 is an SMA head, an N-to-SMA adapter is required. If the port of the third end C13 of the first coupler 11 and the port of the input end of the tested piece 200 are not matched, the number of the first rf connector adapters is two. In this embodiment, the first power meter 12 needs to add the loss of the first cable and the loss of the first rf connector adapter to calculate the actual input power of the measured piece 200.
The second connector 202 includes a second cable and a second rf connector adapter, the number of which is the same as above. As above, the second power meter 22 needs to subtract the loss of the second cable and the second rf connector adapter to calculate the real output power of the measured piece 200 during calibration.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The radio frequency power test box is used for testing the power of a tested piece and is characterized by comprising an input power test module, wherein the input power test module comprises a first coupler and a first power meter;
the first end of the first coupler is used for being electrically connected with the signal transmitting end, the second end of the first coupler is electrically connected with the first power meter, and the third end of the first coupler is used for being electrically connected with the input end of the tested piece through a first connecting piece;
the signal transmitting end transmits signals; and after the first power meter tests the power of the second end signal of the first coupler, calculating the power of the third end signal of the first coupler according to the measured value, and adding the loss of the first connecting piece to obtain the real input power of the tested piece.
2. The radio frequency power test box of claim 1, further comprising an output power test module comprising a second coupler and a second power meter;
the first end of the second coupler is used for being electrically connected with the output end of the tested piece through a second connecting piece, the second end of the second coupler is electrically connected with the second power meter, and the third end of the coupler is used for being electrically connected with the signal receiving end;
and after the second power meter tests the power of the second end signal of the second coupler, calculating the power of the first end signal of the second coupler according to the measured value, and subtracting the loss of the second connecting piece, thereby obtaining the real output power of the tested piece.
3. The radio frequency power test box of claim 2, further comprising:
a case;
the first interface is arranged on the box body, one end of the first interface is electrically connected with the first end of the first coupler, and the other end of the first interface is electrically connected with the signal transmitting end;
the second interface is arranged on the box body, one end of the second interface is electrically connected with the third end of the first coupler, and the other end of the second interface is electrically connected with the input end of the tested piece through the first connecting piece;
the third interface is arranged on the box body, one end of the third interface is electrically connected with the first end of the second coupler, and the other end of the third interface is electrically connected with the output end of the tested piece through the second connecting piece; and
and the fourth interface is arranged on the box body, one end of the fourth interface is electrically connected with the third end of the second coupler, and the other end of the fourth interface is electrically connected with the signal receiving end.
4. An automatic radio frequency testing system for automatically testing radio frequency performance of a test object, comprising:
the signal transmitting terminal is used for transmitting signals;
a radio frequency power test box according to any one of claims 1 to 3;
a signal receiving end for receiving signals; and
the function change-over switch box is respectively and electrically connected with the signal transmitting end, the radio frequency power testing box, the signal receiving end and the tested piece, and the function change-over switch box respectively controls the signal transmitting end, the signal receiving end, the radio frequency power testing box and the tested piece to be connected and form a signal loop.
5. The radio frequency automatic test system of claim 4, wherein the function switch box comprises:
the first end of the first instrument selection switch is electrically connected with the signal transmitting end;
a first option input selector switch, a first end of the first option input selector switch being electrically connected to a second end of the first meter selector switch, a second end of the first option input selector switch being electrically connected to a first end of the first coupler;
the first end of the first element output selection switch is electrically connected with the third end of the first coupler, and the second end of the first element output selection switch is used for being electrically connected with the input end of the tested element;
the first end of the second instrument selection switch is electrically connected with the signal receiving end;
a second option input selector switch, a first end of the second option input selector switch being electrically connected to a second end of the second meter selector switch, a second end of the second option input selector switch being electrically connected to a third end of the second coupler;
the first end of the second element output selection switch is electrically connected with the first end of the second coupler, and the second end of the second element output selection switch is also used for being electrically connected with the output end of the tested element.
6. The system of claim 4, wherein the first power meter is connected to the signal transmitting terminal through a controller, and/or the signal transmitting terminal is a signal source.
7. The system of claim 4, wherein the second power meter is coupled to a controller and/or the signal receiving terminal is a spectrometer.
8. The radio frequency automatic test system of claim 4, wherein the first connector comprises a first cable and the second connector comprises a second cable.
9. The automatic radio frequency testing system of claim 4, wherein the first connector further comprises a first radio frequency connector adapter and the second connector further comprises a second radio frequency connector adapter.
10. The system of claim 4, wherein the signal transmitting end is a signal generator port of a vector network analyzer and the signal receiving end is an observation receiver port of the vector network analyzer.
CN202322242648.7U 2023-08-21 2023-08-21 Radio frequency power test box and radio frequency automatic test system Active CN220570539U (en)

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