CN220511084U - Power amplifying device of radio frequency test instrument - Google Patents
Power amplifying device of radio frequency test instrument Download PDFInfo
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- CN220511084U CN220511084U CN202322103300.XU CN202322103300U CN220511084U CN 220511084 U CN220511084 U CN 220511084U CN 202322103300 U CN202322103300 U CN 202322103300U CN 220511084 U CN220511084 U CN 220511084U
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 230000003321 amplification Effects 0.000 claims abstract description 35
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 35
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
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- 230000001276 controlling effect Effects 0.000 description 4
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Abstract
The utility model belongs to the technical field of radio frequency testing, and particularly relates to a power amplifying device of a radio frequency test instrument, which comprises the following components: a function matrix switch box and a power amplification box; the functional matrix switch box comprises an instrument selection switch, a selection input end switch and a selection output end switch, wherein the instrument selection switch comprises an instrument selection passage, and a first end of the instrument selection passage is electrically connected with the test instrument; the option input end switch comprises an option input end passage, a first end of the option input end passage is electrically connected with a second end of the instrument selection passage, and the option output end switch comprises an option output end passage; the power amplification box comprises an input end and an output end, wherein the input end is electrically connected with the second end of the option input end passage, and the output end is electrically connected with the first end of the option output end passage; the test efficiency is high, and the test instrument is automatically connected into the power amplification box to amplify the power of the signal of the test instrument.
Description
Technical Field
The utility model belongs to the technical field of radio frequency testing, and particularly relates to a power amplifying device of a radio frequency test instrument.
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. Radio frequency devices have vital applications in both the consumer electronics and military industries, and industry capital and national funds will be increasingly valued. Under the assistance of capital of each party, the domestic radio frequency device industry will meet a new round of industry development opportunities.
The performance of the rf device, such as noise figure, S parameter, etc., needs to meet certain requirements to be applied, and thus, needs to be tested. In order to improve the test efficiency, an automated test apparatus is generally used for testing.
However, in the existing automatic test scheme, the situations of insufficient electromagnetic wave transmitting power and insufficient power of the meter often occur.
Disclosure of Invention
The utility model aims to provide a radio frequency test instrument power amplifying device capable of increasing the instrument testing capability.
In order to achieve the above object, the present utility model provides a power amplifying device of a radio frequency test instrument, comprising: a function matrix switch box and a power amplification box;
the function matrix switch box comprises an instrument selection switch, a selection input end switch and a selection output end switch, wherein the instrument selection switch comprises an instrument selection passage, and a first end of the instrument selection passage is electrically connected with a test instrument;
the option input end switch comprises an option input end passage, and a first end of the option input end passage is electrically connected with a second end of the instrument selection passage;
the option output end switch comprises an option output end passage;
the power amplification box comprises an input end and an output end, wherein the input end is electrically connected with the second end of the option input end passage, and the output end is electrically connected with the first end of the option output end passage.
In some embodiments, the number of meter select passages, the option input passages, and the option output passages are each a plurality.
In some embodiments, the second end of the option input path of the option input switch is electrically connected to the first end of the option output path of the option output switch.
In some embodiments, the meter selector switch and/or the option input switch and/or the option output switch is comprised of a plurality of multi-path radio frequency switches.
In some embodiments, the power amplifier box comprises a power amplifier and a power module, a first end of the power amplifier is electrically connected with an input end of the power amplifier box, a second end of the power amplifier is respectively electrically connected with an output end of the power amplifier box and a first end of the power module, and a second end of the power module is grounded.
In some embodiments, an equalizer is also connected in series between the second end of the power amplifier and the output end of the power amplifier tank.
In some embodiments, an attenuator is further connected in series between the equalizer and the output of the power amplifier tank.
In some embodiments, the power amplification tank further comprises a power feedback circuit comprising a coupler, a detector, and a single chip microcomputer, wherein the coupler is electrically connected with the second end of the equalizer through the detector.
In some embodiments, the power module includes a dc power supply, a power filter, a linear voltage regulator, and a low dropout linear voltage regulator, wherein an anode of the dc power supply is electrically connected to a first end of the power filter, and a second end of the power filter is electrically connected to an output end of the power amplifier box through the linear voltage regulator and the low dropout linear voltage regulator in sequence.
In some embodiments, the second end of the option output path is electrically connected to the part under test.
Compared with the prior art, the utility model has the beneficial effects that:
the radio frequency test instrument power amplification device provided by the application realizes automatic test by controlling the closing of the instrument selection passage, has high test efficiency, and automatically accesses the power amplification box by controlling the closing of the selection member input end passage and the selection member output end passage, so that the power amplification can be carried out on the signal of the test instrument when the requirement exists, and the test range is enlarged.
Drawings
FIG. 1 is a schematic diagram of a power amplifying device of a radio frequency test meter according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a power amplifying device of a RF test meter according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a radio frequency switch according to an embodiment of the present application;
FIG. 4 is a circuit diagram of a power amplifying device of a RF test meter according to an embodiment of the present application;
fig. 5 is a circuit diagram of a power amplifying tank according to an embodiment of the present application.
In the figure:
100. a function matrix switch box; 10. an instrument selection switch; j1, a first radio frequency switch; j2, a second radio frequency switch; j3, a third radio frequency switch; 11. the instrument selects a passage; 301. an oscilloscope; 302. a spectrometer; 303. a signal source; 304. a noise source; p1, a first port of a vector network analyzer; p2, a second port of the vector network analyzer; 20. a option input switch; 21. a option input path; j4, a fourth radio frequency switch; j5, a fifth radio frequency switch; j6, a sixth radio frequency switch; 30. a selection output end switch; j7, a seventh radio frequency switch; j8, an eighth radio frequency switch; j9, a ninth radio frequency switch; 200. a power amplifying box; an input of the IN and power amplification box; OUT, the output end of the power amplification box; 210. a power amplifier; 220. a power module; 221. a direct current power supply; 222. a power filter; 223. a linear voltage stabilizer; 224. a low dropout linear regulator; 230. an equalizer; 240. an attenuator; 250. a power feedback circuit; 251. a coupler; 252. a wave detector; J11/J12/J13/J21/J22/J23/J31/J32/J33/J41/J42/J43/J51/J52/J53/J61/J62/J63/J71/J72/J73/J81/J82/J83/J91/J92/J93, a connector; 40. an interface.
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.
In order to improve the test efficiency, an automatic test meter switching scheme is generally adopted to replace different test items. However, in actual work, it is found that some meters have insufficient emission power to support higher test requirements, and further the application provides a radio frequency test meter power amplifying device capable of increasing the emission power of the meters in an automatic switching test meter circuit.
Example 1
Fig. 1 is a schematic diagram of a power amplifying device of a radio frequency test instrument according to an embodiment of the present application.
As shown in fig. 1, this embodiment provides a power amplifying device of a radio frequency test instrument, including: a function matrix switch box 100 and a power amplification box 200;
the function matrix switch box 100 comprises a meter selection switch 10, a option input switch 20 and an option output switch 30, wherein the meter selection switch 10 comprises a meter selection channel 11, and a first end of the meter selection channel 11 is electrically connected with a test meter 300;
the option input switch 20 includes an option input path 21, a first end of the option input path 21 being electrically connected to a second end of the meter selection path 11;
the option output switch 30 includes an option output path 31;
the power amplifier box includes an input electrically connected to the second end of the option input path 21 and an output electrically connected to the first end of the option output path 31.
The working process of the power amplifying device of the radio frequency test instrument provided by the embodiment is as follows:
the control meter selection path 11 is closed so that the test meter 300 electrically connected thereto is accessed, thereby allowing the test item corresponding to the test meter 300 to be made. At this time, the meter selection path 11 electrically connected to the other test meter 300 is disconnected.
The control element input end passage 21 and the control element output end passage 31 are closed, so that the power amplification box 200 electrically connected with the control element input end passage is connected, signals of the test instrument 300 on the passages are enhanced, the test range is enlarged, and the test requirement is met. At this time, the other option input paths 21 and the option output paths 31 may be opened or closed, and if opened, only the test meter 300 on one path is subjected to power amplification at this time; if closed, then power amplification may be performed simultaneously for multiple test meters 300.
The power amplification device of the radio frequency test instrument provided by the embodiment realizes automatic test by controlling the closing of the instrument selection passage 11, has high test efficiency, and automatically accesses the power amplification box 200 by controlling the closing of the element selection input end passage 21 and the element selection output end passage 31, so that the power amplification of the signal of the test instrument 300 can be performed when the requirement exists, and the test range is enlarged.
In one embodiment, a second end of the option output path 31 is electrically connected to a DUT (Device Under Test, DUT) for radio frequency testing of the DUT.
Example 2
Fig. 2 is a schematic diagram of a power amplifying device of a radio frequency test meter according to another embodiment of the present application.
As shown in fig. 2, the number of meter selection paths 11 is plural, and thus the number of test meters 300 that can be connected is plural, so that more different types of test items can be tested. By performing different opening/closing control on the plurality of meter selection paths 11, more test items are switched. Under the requirement of carrying out a plurality of tests on the tested piece, the test items can be automatically switched, the test efficiency is higher, and the use is more convenient. Those skilled in the art will readily recognize that it is within the scope of the present application that the types of test meters 300 are identical.
The number of the option input end passages 21 is multiple, the number of the option output end passages 31 is multiple, and the power amplification box 200 can be connected under different test instruments 300, so that power amplification can be carried out on the plurality of test instruments 300, the power amplification device is flexible and changeable, and more test requirements and test scenes can be met.
A second end of the option output path 31 of the option output switch 30 is for electrical connection with the DUT. One skilled in the art will readily recognize that the second end of the option output path 31 is used to electrically connect with the DUT.
In one embodiment, the second end of the option input path 21 of the option input switch 20 is electrically connected to the first end of the option output path 31 of the option output switch 30. At this time, when the power of the signal of the test meter 300 is not required to be increased, the option input end path 21 and the option output end path 31 are controlled to be closed, so that the option input end switch 20 and the option output end switch 30 are directly conducted, and the power amplifier box 200 is not required to be passed, so that the method is flexible and convenient, and meets more test requirements.
Example 3
Fig. 3 is a schematic structural diagram of a radio frequency switch according to an embodiment of the present application, and fig. 4 is a circuit diagram of a power amplifying device of a radio frequency test instrument according to an embodiment of the present application.
As shown in fig. 3, the meter selector switch 10 and/or the option input switch 20 and/or the option output switch 30 of the rf test meter power amplifying device provided in this embodiment are respectively composed of a plurality of multi-path rf switches 40. Specifically, as shown in fig. 3, the radio frequency switch 40 includes a first connector 41 and a plurality of second connectors 42, the first connector 41 is configured as a first end or a second end of the meter selection path 11, the option input path 21, or the option output path 31, and each of the second connectors 42 is configured as a second end or a first end of the meter selection path 11, the option input path 21, or the option output path 31.
The meter selector switch 10, the option input end switch 20 and/or the option output end switch 30 of the rf test meter power amplifying device provided in this embodiment are composed of a plurality of multi-path rf switches 40, and have more ports, so that more test meters 300 can be connected.
Specifically, in the present embodiment, as shown in fig. 4, the meter selection switch 10 includes a first radio frequency switch J1, a second radio frequency switch J2, and a third radio frequency switch J3. The option input switch 20 includes a fourth rf switch J4, a fifth rf switch J5, and a sixth rf switch J6, and the option output switch 30 includes a seventh rf switch J7, an eighth rf switch J8, and a ninth rf switch J9.
The connector J11 of the first rf switch J1 is electrically connected to the first ports P1, J12 of the vector network analyzer (VNA, vector Network Analyzer) to the oscilloscope 301, the connector J13 is electrically connected to the connector J43 of the fourth rf switch J4, the connector J42 is electrically connected to the input IN of the power amplifier box 200, the connector J41 is electrically connected to the connector J71, J72 of the seventh rf switch J7, and the output OUT of the power amplifier box 200.
Connector J21 of second radio frequency switch J2 is electrically connected to second port P2 of the vector network analyzer, connector J22 is electrically connected to spectrometer 302, J23 and J53 are connected, J51 and J81 are connected, and J52 and J82 are connected.
The connector J31 of the third rf switch J3 is electrically connected to the signal source 303, the connector J32 is electrically connected to the noise source 304, the connector J33 is electrically connected to the connector J63 of the sixth rf switch J6, the connector J61 is electrically connected to the connector J92, the connector J62 is electrically connected to the input IN of the power amplifier box 200, the connector J91 is electrically connected to the output OUT of the power amplifier box 200, and the connectors J73, J83 and J93 are electrically connected to the corresponding interfaces 40, respectively, so as to electrically connect to the DUT.
In testing a DUT, it is sometimes necessary to use three test meters 300 simultaneously, for example, in testing a mixer, it is necessary to connect a spectrometer and two signal sources to three ports of the mixer. For another example, in amplifier linearity testing, a signal source and a spectrometer need to be connected to the input and output ports of the amplifier, respectively. The following describes the specific circuit connection relationship and operation procedure that need to be tested by using two test meters 300 at the same time, as follows:
the signal source 303 is connected with the instrument selection switch J31, the level of the signal is increased for the J31, the signal is input from the J31, the signal is output from the common terminal J33, the level of the signal is increased for the J62, the signal is input from the J63, and the signal is output from the J62. Power amplification box 200: and (3) adding a high level to J72, amplifying the signal by a power amplification box 200, inputting the signal from J72, and outputting the signal from a common terminal of J73 to DUT IN. To raise J81 to a high level, a signal is output from DUT OUT, the common terminal of J83 is input, and J81 is output. To raise J51 to a high level, a signal is input from J51 and output from common terminal J53. With J22 raised, the signal is input from J23 and J22 is output to spectrometer 302.
The complete signal link is: the signal source 303→j31→j33→j63→j62→the input terminal IN of the power amplification box 200→the output terminal OUT of the power amplification box 200→j72→j73→dut→j83→j81→j51→j53→j23→j22→the spectrometer 302.
Example 4
Fig. 5 is a circuit diagram of a power amplifying tank according to an embodiment of the present application.
As shown IN fig. 5, the power amplification box 200 provided IN this embodiment includes a power amplifier 210 and a power module 220, where a first end of the power amplifier 210 is electrically connected to an input terminal IN of the power amplification box 200, and a second end of the power amplifier 210 is electrically connected to an output terminal OUT of the power amplification box 200 and a first end of the power module 220, respectively, and a second end of the power module 220 is grounded to GND.
In the present embodiment, the power module 220 is an LDO (Low Dropout Regulaor, low dropout linear regulator) power supply. Specifically, the power module 220 includes a dc power supply 221, a power filter 222, a linear voltage regulator 223, and a low dropout linear voltage regulator 224, where an anode of the dc power supply 221 is electrically connected to a first terminal of the power filter 222, and a second terminal of the power filter 222 is electrically connected to an output terminal OUT of the power amplification box 200 through the linear voltage regulator 223 and the low dropout linear voltage regulator 224 in sequence.
In one embodiment, an equalizer 230 is further connected in series between the second end of the power amplifier 210 and the output end OUT of the power amplifier box 200, so as to increase the gain flatness of the power amplifier 210, stabilize the output power, and prevent the DUT from being damaged or causing deviation of the DUT test result due to large fluctuation of the output power.
In one embodiment, an attenuator 240 is further connected in series between the equalizer 230 and the output terminal OUT of the power amplification box 200, so as to prevent the signal power amplified by the power amplifier 210 from being too strong, and also to obtain the signal of the target power. Specifically, after the signal is amplified by the power amplifier 210, the signal power may be higher than the target power value, and the attenuator 240 is controlled to attenuate to obtain the target power signal.
In one embodiment, power amplification chamber 200 further includes a power feedback circuit 250, power feedback circuit 250 including a coupler 251, a detector 252, and a single chip microcomputer (not shown), coupler 251 being electrically coupled to a second end of equalizer 230 via detector 252. Firstly, a corresponding target voltage value V1 is preset in the singlechip according to the target output power. When the signal is transmitted to the output of the attenuator 240, the coupler 251 couples the signal from the main circuit, and the coupling degree of the coupler 251 varies little, so that the coupling power can be considered constant, and thus the coupling power can be obtained by calculating the difference between the main signal power and the coupling loss power. The coupling port of the coupler 251 is connected with a detector 252, and the coupling power is converted into a voltage signal value V2 and then fed back to the singlechip, so that the change of the output power of the main path is clearly detected. The single chip compares the received voltage signal value V2 with a preset target voltage value V1 and sends the comparison result to the attenuator 240. And adjusts the control voltage of the attenuator 240 to adjust the attenuation value. The regulated power is coupled, detected, compared and regulated until the output power meets the requirement.
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. A radio frequency test meter power amplifying device, comprising: a function matrix switch box and a power amplification box;
the function matrix switch box comprises an instrument selection switch, a selection input end switch and a selection output end switch, wherein the instrument selection switch comprises an instrument selection passage, and a first end of the instrument selection passage is electrically connected with a test instrument;
the option input end switch comprises an option input end passage, and a first end of the option input end passage is electrically connected with a second end of the instrument selection passage;
the option output end switch comprises an option output end passage;
the power amplification box comprises an input end and an output end, wherein the input end is electrically connected with the second end of the option input end passage, and the output end is electrically connected with the first end of the option output end passage.
2. The rf test meter power amplifier of claim 1, wherein the number of meter select paths, the number of option input paths, and the number of option output paths are each plural.
3. The radio frequency test meter power amplifying device according to claim 1, wherein the second end of the option input path of the option input switch is electrically connected to the first end of the option output path of the option output switch.
4. A radio frequency test meter power amplifying device according to claim 1, wherein said meter selector switch and/or said option input switch and/or said option output switch are comprised of a plurality of multi-path radio frequency switches.
5. The power amplifying device of a radio frequency test instrument according to claim 1, wherein the power amplifying box comprises a power amplifier and a power module, a first end of the power amplifier is electrically connected with an input end of the power amplifying box, a second end of the power amplifier is electrically connected with an output end of the power amplifying box and a first end of the power module respectively, and a second end of the power module is grounded.
6. The power amplifying device of a radio frequency test meter according to claim 5, wherein an equalizer is further connected in series between the second end of the power amplifier and the output end of the power amplifying tank.
7. The power amplifying device of a radio frequency test instrument according to claim 6, wherein an attenuator is further connected in series between the equalizer and the output end of the power amplifying tank.
8. The power amplification device of claim 7, wherein the power amplification box further comprises a power feedback circuit, the power feedback circuit comprising a coupler, a detector, and a single-chip microcomputer, the coupler being electrically connected to the second end of the equalizer through the detector.
9. The power amplifying device of a radio frequency test instrument according to claim 5, wherein the power module comprises a dc power supply, a power filter, a linear voltage stabilizer and a low dropout linear voltage stabilizer, the positive electrode of the dc power supply is electrically connected to the first end of the power filter, and the second end of the power filter is electrically connected to the output end of the power amplifying box sequentially through the linear voltage stabilizer and the low dropout linear voltage stabilizer.
10. The power amplifier of claim 1, wherein the second end of the option output path is electrically connected to the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322103300.XU CN220511084U (en) | 2023-08-07 | 2023-08-07 | Power amplifying device of radio frequency test instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322103300.XU CN220511084U (en) | 2023-08-07 | 2023-08-07 | Power amplifying device of radio frequency test instrument |
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| CN220511084U true CN220511084U (en) | 2024-02-20 |
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| CN202322103300.XU Active CN220511084U (en) | 2023-08-07 | 2023-08-07 | Power amplifying device of radio frequency test instrument |
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- 2023-08-07 CN CN202322103300.XU patent/CN220511084U/en active Active
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