CN111157804B - Radio frequency switch module and antenna test system - Google Patents
Radio frequency switch module and antenna test system Download PDFInfo
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- CN111157804B CN111157804B CN201911424244.1A CN201911424244A CN111157804B CN 111157804 B CN111157804 B CN 111157804B CN 201911424244 A CN201911424244 A CN 201911424244A CN 111157804 B CN111157804 B CN 111157804B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
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Abstract
The application relates to a radio frequency switch module and an antenna test system. In the radio frequency switch module, a first selection switch unit and a second selection switch unit are connected with the antennas to be tested through radio frequency change-over switches, can be matched to form a passage between radio frequency ports and are used for testing the radio frequency ports of the antennas to be tested; meanwhile, the function switch can switch between the first function port and the second selection switch unit, and the first function port can be connected with the calibration port of the antenna to be tested or the next radio frequency switch module, or in no-load setting. Based on the structure, the radio frequency switch module can independently test the antenna to be tested, and when the radio frequency ports needing to be tested are increased, one or even a plurality of radio frequency switch modules can be connected in an extensible mode, so that the test of all the radio frequency ports can be met under the condition that the switch level is not increased, the increase of transmission loss can be avoided, and the measurement precision is guaranteed.
Description
Technical Field
The present application relates to the field of antenna testing technologies, and in particular, to a radio frequency switch module and an antenna testing system.
Background
Mainstream antenna types of 5G (5 th-Generation, fifth Generation mobile communication technology) communication systems include 5G large-scale array antennas and conventional multi-port antennas. With the increase of the number of antenna ports, antenna testing faces a new challenge, mainly embodied in that there are many ports to be tested, the device calibration and testing process is complex, and the efficiency is low. To improve the efficiency of testing, there are two types of solutions in the industry today: firstly, a multiport vector network analyzer is used, but the price of the multiport vector network analyzer is high; and secondly, a port expansion type test system is formed by the multi-port switch matrix and the vector network analyzer, and the price is relatively low.
However, in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: when the radio frequency ports of the traditional matrix type switch module to be tested are increased, the transmission loss of each branch circuit is increased, and the measurement precision is reduced.
Disclosure of Invention
Therefore, it is necessary to provide a radio frequency switch module and an antenna test system for solving the problems of the conventional matrix switch module that the loss is increased and the measurement accuracy is reduced when the number of radio frequency ports to be tested is increased.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a radio frequency switch module, including:
the function switch comprises a function switching port, a first function port and a second function port; the function switching port is used for connecting a first test port of the vector network analyzer; the first functional port is used for connecting a calibration port of the antenna to be tested, or connecting the next radio frequency switch module, or carrying out no-load setting;
a first selection switch unit including a first common port and N first selection ports; the first public port is used for connecting a second test port of the vector network analyzer or connecting a radio frequency switch module; the first public port is communicated with any one of the first selection ports;
a second selection switch unit including a second common port and N second selection ports; the second public port is connected with the second functional port; the second public port is communicated with any one second selection port;
n radio frequency transfer switches; the radio frequency switch comprises a first switch port, a second switch port and a radio frequency public port; the N radio frequency public ports are used for being connected with the N radio frequency ports of the antenna to be tested in a one-to-one corresponding mode; the N first switching ports are connected with the N first selection ports in a one-to-one corresponding mode; the N second switching ports are connected with the N second selection ports in a one-to-one correspondence mode.
In one embodiment, the rf switch module further comprises:
and the control unit is respectively connected with the control port of the function change-over switch, the control port of the first selection switch unit, the control port of the second selection switch unit and the control ports of the N radio frequency change-over switches.
In one embodiment, the first selection switch unit includes a first primary stage changeover switch and a plurality of first final stage changeover switches.
The common port of the first primary diverter switch is connected to the first common port.
The common port of the first final-stage change-over switch is used for connecting a corresponding change-over port in the first primary-stage change-over switch; the switching ports of the first final-stage switches are connected with the first selection ports in a one-to-one correspondence manner.
In one embodiment, the first selection switch unit further includes a plurality of first mid-stage switches. The common port of the first intermediate-stage change-over switch is connected with the corresponding change-over port in the first primary-stage change-over switch; the common port of each first final stage change-over switch is connected with the switching port of each first middle stage change-over switch in a one-to-one correspondence mode.
In one embodiment, the second selection switch unit includes a second primary stage changeover switch and a plurality of second final stage changeover switches.
The common port of the second primary diverter switch is connected to the second common port.
The common port of the second final-stage change-over switch is used for connecting a corresponding change-over port in the second primary-stage change-over switch; the switching ports of the second final-stage change-over switches are connected with the second selection ports in a one-to-one correspondence mode.
In one embodiment, the second selection switch unit further includes a plurality of second mid-stage switches. The common port of the second intermediate-stage change-over switch is connected with the corresponding change-over port in the second primary-stage change-over switch; and the common port of each second final-stage change-over switch is connected with the switching port of each second middle-stage change-over switch in a one-to-one correspondence manner.
In one embodiment, the function switch and the radio frequency switch are single-pole double-throw switches.
In one embodiment, the function switch is a single pole, triple throw switch; and the third function port of the function changeover switch is used for short-circuiting the load.
In one embodiment, the radio frequency switch is a single-pole three-throw switch; and a third switching port of the radio frequency switch is used for short-circuiting the load.
On the other hand, an embodiment of the present application further provides an antenna testing system, including:
at least two radio frequency switch modules as described above;
and the vector network analyzer is used for connecting the antenna to be tested through each radio frequency switch module.
One of the above technical solutions has the following advantages and beneficial effects:
in the radio frequency switch module, a first selection switch unit and a second selection switch unit are connected with the antennas to be tested through radio frequency change-over switches, can be matched with each other to form a passage between radio frequency ports and are used for testing the radio frequency ports of the antennas to be tested; meanwhile, the function switch can switch between the first function port and the second selection switch unit, and the first function port can be connected with the calibration port of the antenna to be tested or the next radio frequency switch module, or in a no-load setting. Based on the structure, the radio frequency switch module can independently test the antenna to be tested, and when the radio frequency ports needing to be tested are increased, one or even a plurality of radio frequency switch modules can be connected in an extensible mode, so that the test of all the radio frequency ports can be met under the condition that the switch level is not increased, the increase of transmission loss can be avoided, and the measurement precision is guaranteed.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular description of preferred embodiments of the application, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the subject matter of the present application.
FIG. 1 is a first schematic block diagram of an RF switch module in one embodiment;
FIG. 2 is a first schematic test architecture diagram of an RF switch module in one embodiment;
FIG. 3 is a second schematic test architecture diagram of an RF switch module in one embodiment;
FIG. 4 is a third exemplary test architecture diagram of an RF switch module in one embodiment;
FIG. 5 is a fourth schematic test architecture diagram of an RF switch module in one embodiment;
FIG. 6 is a fifth exemplary test architecture diagram of an RF switch module in one embodiment;
fig. 7 is a second schematic block diagram of an rf switch module in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "common port", "select port", "function port", and "switch port" are used herein in a similar sense for purposes of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
When a test port is added to a traditional matrix switch module, a switch level needs to be added; moreover, after the traditional matrix switch module is cascaded with the vector network analyzer, the measurement precision can be reduced. Especially when testing the calibration channel of the 5G antenna, the calibration signal itself is weak, the switching module level is too many, and the transmission loss of the switching module level may make the measurement result unstable.
In order to improve the influence of the expansion test port on the measurement precision, particularly the measurement precision of a calibration channel, an independent switching channel is added in the switch on the basis of a traditional switch module in the embodiment of the application; the switching channel can be directly connected with a calibration channel of the 5G large-scale array antenna, and can also be used as an expansion port for expanding the number of test ports. Meanwhile, the embodiment of the application is also suitable for testing the conventional multi-port antenna.
In one embodiment, there is provided a radio frequency switch module, as shown in fig. 1, comprising:
the function switch comprises a function switching port, a first function port and a second function port; the first public port is used for connecting a first test port of the vector network analyzer; the first function port is used for connecting a calibration port of the antenna to be tested, or connecting the next radio frequency switch module, or carrying out no-load setting.
A first selection switch unit including a first common port and N first selection ports; the first public port is used for connecting a second test port of the vector network analyzer or connecting a radio frequency switch module; the first common port is in communication with any one of the first select ports.
A second selection switch unit including a second common port and N second selection ports; the second public port is connected with the second functional port; the second common port is in communication with any of the second select ports.
N radio frequency transfer switches; the radio frequency switch comprises a first switch port, a second switch port and a radio frequency public port; the N radio frequency public ports are used for being connected with the N radio frequency ports of the antenna to be tested in a one-to-one corresponding mode; the N first switching ports are connected with the N first selection ports in a one-to-one corresponding mode; the N second switching ports are connected with the N second selection ports in a one-to-one correspondence mode.
Specifically, the radio frequency switch module comprises a plurality of radio frequency switches for connecting the antennas to be tested. The radio frequency switch comprises a public port, a first switching port and a second switching port, wherein the public port is conducted with the first switching port or the second switching port. In the radio frequency switch module, each public port is used for being correspondingly connected with the radio frequency port of the antenna to be tested one by one, so that the radio frequency signal transmission between the radio frequency switch module and the antenna to be tested is realized; each first switching port is connected with each first selection port of the first selection switch unit in a one-to-one correspondence manner, and meanwhile, each second switching port is connected with each second selection port of the second selection switch unit in a one-to-one correspondence manner. Based on this, the radio frequency switch can control the corresponding radio frequency port to be conducted with the first selection switch unit or the second selection switch unit. Illustratively, the radio frequency switch P1 may be matched with the first selection switch unit to realize the conduction between the radio frequency port 1 and the first common port, and meanwhile, the radio frequency switch Pi may also be matched with the second selection switch unit to realize the conduction between the radio frequency port i and the second common port, so as to form a path between the radio frequency port 1 and the radio frequency port i, and perform a test on the path.
The first common port of the first selection switch unit may be used to connect a second test port of the vector network analyzer or a previous radio frequency switch module, so as to implement a separate test function of the radio frequency switch module or an extended test function. Meanwhile, the radio frequency switch module is also provided with a function switch for switching the functions of the radio frequency switch module; in the function switch, the function switch port is connected to the first function port or the second function port. Specifically, the first functional port can be connected with a calibration port of an antenna to be tested, can also be connected with a next radio frequency switch module, and can also be in no-load setting; the second public port is connected with a second public port of the second selection switch unit; the function switching port can be used for connecting a vector network analyzer. Based on this, the function switch can switch between the second selection switch unit and the second function port, and further realize the function switch of single module test and multiple module test.
In one example, an antenna to be tested is tested through a radio frequency switch module, at this time, each radio frequency switch is respectively connected with a corresponding radio frequency port, a first public port is connected with a second test port of a vector network analyzer, and a function switch port is connected with a first test port of the vector network analyzer. Optionally, if the antenna to be tested includes a calibration port, the first functional port may be connected to the calibration port; in addition, the first function port may also be idle. Based on the test method, one radio frequency switch module can independently test 5G large-scale array antennas, multi-port antennas and the like.
Illustratively, when testing the path between the radio frequency ports, the function switch realizes the conduction between the function switch port and the second function port. Specific signal flow processes may be, for example: after the radio frequency signal sent by the vector network analyzer through the second test port sequentially passes through the first selector switch unit, the radio frequency selector switch, the two radio frequency ports, the radio frequency selector switch, the second selector switch unit and the function selector switch, the radio frequency signal finally enters the vector network analyzer from the first test port, and then the access test of the two radio frequency ports is realized.
For another example, when testing the path between the rf port and the calibration port, the function switch realizes the conduction between the function switch port and the first function port. Specific signal flow processes may be, for example: after the radio frequency signal sent by the vector network analyzer through the second test port sequentially passes through the first selector switch unit, the radio frequency selector switch, the radio frequency port, the calibration port and the function selector switch, the radio frequency signal finally enters the vector network analyzer from the first test port, and then the access test of the radio frequency port and the calibration port is realized.
In another example, the antenna to be tested is tested by at least two radio frequency switch modules, and at this time, the radio frequency switch of each radio frequency switch module is respectively connected to the corresponding radio frequency port; a first public port of the first-stage radio frequency switch module is connected with a second test port of the vector network analyzer, and a function switching port is connected with a first test port of the vector network analyzer; the first function port is connected with the first public port of the next radio frequency switch module, the function switching port of the next radio frequency switch module is connected with the first test port of the vector network analyzer, and the like, the plurality of radio frequency switch modules can be connected in a chain manner, and the test ports are expanded to meet the number of the radio frequency ports of the antenna to be tested. Optionally, if the antenna to be tested includes a calibration port, the first functional port of the final rf switch module may be connected to the calibration port; in addition, the first functional port of the final stage rf switch module may also be idle. Based on this, a plurality of radio frequency switch module extension are connected, can cooperate the test of realizing 5G large-scale array antenna, multiport antenna etc..
Illustratively, the radio frequency switch module of the first stage is connected with the radio frequency ports 1 to 16, and the radio frequency switch module of the second stage is connected with the radio frequency ports 17 to 32 and is connected with the calibration port. When testing the channel between the radio frequency port 3 and the radio frequency port 21, the function switch of the first-stage radio frequency switch module realizes the conduction between the function switch port and the first function port; the function switch of the second-stage radio frequency switch module can realize the conduction between the function switch port and the second function port. Specific signal flow processes may be, for example: after the radio-frequency signal sent by the vector network analyzer through the second test port sequentially passes through the first selection switch unit and the radio-frequency selector switch of the first-stage radio-frequency switch module, the two radio-frequency ports, the radio-frequency selector switch of the second-stage radio-frequency switch module, the second selection switch unit and the function selector switch, the radio-frequency signal finally enters the vector network analyzer from the first test port, and then the path tests of the radio-frequency ports 3 and 21 are realized.
For another example, when testing the path between the rf port 6 and the calibration port, the function switch of the first-stage rf switch module realizes the conduction between the function switch port and the first function port; and the function switch of the second-stage radio frequency switch module realizes the conduction between the function switch port and the first function port. Specific signal flow processes may be, for example: after the radio frequency signal sent by the vector network analyzer through the second test port sequentially passes through the first selection switch unit and the radio frequency change-over switch of the first-stage radio frequency switch module, the radio frequency port, the calibration port and the function change-over switch of the second-stage radio frequency switch module, the radio frequency signal finally enters the vector network analyzer from the first test port, and then the access test of the radio frequency port 6 and the calibration port is realized.
According to the multiple examples, no matter the test between the radio frequency ports or the test between the radio frequency ports and the calibration port, in the mode of testing the antenna independently, and in the mode of testing the antenna by being connected with the extension, the switch level to which the radio frequency signal needs to go through is unchanged, so that the test port can be extended, the antenna test requirement is met, meanwhile, the loss caused by the increase of the switch level is avoided, and the measurement precision is ensured.
It should be noted that the function switch may be mainly composed of single-pole double-throw or single-pole multiple-throw radio frequency switches; the radio frequency switch can also be mainly composed of single-pole double-throw or single-pole multi-throw radio frequency switches. Furthermore, the change-over switch can be configured with devices such as a load and a protection circuit according to requirements, so as to realize further optimization. The first selection switch unit and the second selection switch unit can be selection switch devices of 1 in N-select, namely, a public port is conducted with one of the selection ports to realize the selection of the ports; specifically, the rf switch may be mainly composed of a single-pole double-throw switch, a single-pole multiple-throw switch, or the like. It should be noted that in the embodiments of the present application, N is greater than or equal to 2, for example, N may be 8, 16, 32, or 64, and the like, which is not limited herein.
Based on the structure, the radio frequency switch module can independently test the antenna to be tested, and radio frequency signals can be transmitted through the first selection switch unit, the radio frequency selector switch, the second selection switch unit and the function selector switch, so that the test of the radio frequency port is realized. And when the radio frequency ports to be tested are increased, one or even a plurality of radio frequency switch modules can be connected in an extensible mode, at the moment, radio frequency signals can still be transmitted through the first selection switch unit, the radio frequency selector switch, the second selection switch unit and the function selector switch, the test of the radio frequency ports is completed, switch levels do not need to be increased, and the influence of loss increase on the measurement precision is avoided. Based on the structure, the test port can be expanded to meet the test requirement of the large-scale array antenna without increasing the cascade structure of the change-over switch; meanwhile, the embodiment of the application can avoid adopting more devices for selecting ports, and further avoid redundant module design and material cost increase. Based on this, under the condition that a switch level is not increased, the method and the device can realize the connection of multiple embodiments in a chain type expansion mode, meet the test of all radio frequency ports, avoid the increase of transmission loss and ensure the measurement precision.
It should be noted that the embodiments of the present application are also applicable to other modes of measurement. In one example, the first stage rf switch module is connected to rf ports 1-16, the second stage rf switch module is connected to rf ports 17-32, and the calibration port is connected. When testing the path between the rf port 18 and the rf port 30, the function switch of the first-stage rf switch module realizes the conduction between the function switch port and the first function port; and the function switch of the second-stage radio frequency switch module can realize the conduction between the function switch port and the second function port. For another example, when testing the path between the rf port 24 and the calibration port, the function switch of the first-stage rf switch module realizes the conduction between the function switch port and the first function port; the function switch of the second-stage radio frequency switch module can realize the conduction between the function switch port and the first function port.
In one embodiment, the radio frequency switch module further comprises:
and the control unit is respectively connected with the control port of the function change-over switch, the control port of the first selection switch unit, the control port of the second selection switch unit and the control ports of the N radio frequency change-over switches.
Specifically, the function selector switch, the first selector switch unit, the second selector switch unit and the radio frequency selector switch all include control ports for switching on ports of the switches; meanwhile, the radio frequency switch module is provided with a control unit for electrically connecting the control ports of the switches. The control unit can send corresponding instructions to the control ports respectively to realize corresponding paths. Based on the structure, the terminal equipment can be connected with the control unit of the radio frequency switch module, so that the radio frequency switch module can be remotely controlled, and the measurement efficiency and precision are improved.
In one example, as shown in fig. 2, 3_1 through 3 _nare N1 in 2 radio frequency switches; the first selection switch unit, the second selection switch unit and 3 _1to 3 _Ncan jointly form a conventional 2 x N matrix type switch module; for general purposes, the rf switch module can be described as having N rf test ports (N ≧ 2, numbered P in the figure) 1 To P N ) And 1 calibrationQuasi channel port (numbered P in the figure) N+1 ). 3 u N +1 is a 1-in-2 function switch added in the embodiment of the application, and the common port P thereof B The first test port is used for connecting the vector network analyzer; common port P of first selection switch unit A And the second test port is used for connecting the vector network analyzer. Switch 3 \ N +1 is switched through the added function, so that port P B Can pass through the least switch number and ports P N+1 And the communication is realized, so that the loss of a test link is reduced, and the test precision is improved. The control unit can control the first selection switch unit, the second selection switch unit, the function selector switch and the radio frequency selector switches to realize the channel test among the radio frequency ports.
In one example, an architecture for testing a 5G large-scale array antenna may be as shown in fig. 3; for general purposes, the RF switch module can be described as having N RF test ports (N ≧ 2, numbered P in the figure) 1 To P N ) And 1 calibration channel port (numbered P in the figure) N+1 ). N radio frequency test ports are connected with each radio frequency port of the antenna in a one-to-one correspondence manner, a calibration channel port is connected with a calibration port of the antenna, and a port P A And P B For connection to a vector network analyzer. The control unit can control the first selection switch unit, the second selection switch unit, the function change-over switch and each radio frequency change-over switch, and tests of a path between radio frequency ports, a path between the radio frequency port and the calibration port and the like are achieved.
In one example, an architecture for testing a 5G large-scale array antenna using two rf switch modules can be shown in fig. 4, where the first rf switch module is described as having N rf test ports (N ≧ 2, numbered P in the figure) 1 To P N ) And 1 cascaded port (numbered P in the figure) N+1 ) (ii) a The second RF switch module is depicted as having N RF test ports (N ≧ 2, numbered Q in the figure) 1 To Q N ) And 1 cascaded port (numbered Q in the figure) N+1 ). Cascade port P of first RF switch module N+1 And a common port Q of a second RF switch module A Are connected. Calibration switch for second RF switch moduleWay port Q N+1 A first common port P of a first RF switch module connected to the calibration port of the antenna A And a function switching port P B And a function switching port Q of a second RF switch module B And the vector network analyzer is connected with the vector network analyzer. In the first rf switch module, the control unit may control the function switch to determine whether to switch to the cascade mode. In the second rf switch module, the control unit may control the function switch to determine whether to switch to the test mode of the calibration port.
In one example, an architecture for testing a conventional multi-port antenna using a single rf switch module may be as shown in fig. 5, where the rf switch module is described as having N rf test ports (N ≧ 2, numbered P in the figure) 1 To P N ) And 1 calibration channel port (number P in the figure) N+1 ). The N radio frequency test ports are connected with the radio frequency ports of the antenna, and the calibration channel ports are set to be in an idle load state. First common port P A And a function switching port P B Used for connecting with a vector network analyzer. The control unit can control the first selection switch unit, the second selection switch unit, the function change-over switch and each radio frequency change-over switch, and the access test among the radio frequency ports is realized.
In one example, an architecture for testing a conventional multi-port antenna using two rf switch modules, a first rf switch module being described as having N rf test ports (N ≧ 2, numbered P in the figure), can be as shown in fig. 6 1 To P N ) And 1 cascade channel (number P in the figure) N+1 ) (ii) a The second RF switch module is depicted as having N RF test ports (N ≧ 2, numbered Q in the figure) 1 To Q N ) And 1 cascade channel (number Q in the figure) N+1 ). Cascade port P of first RF switch module N+1 And a common port Q of a second RF switch module A Are connected. Calibration channel port Q of second RF switch module N+1 Set to an unloaded state. First common port P of first radio frequency switch module A And a function switching port P B And function switching of the second RF switch modulePort Q B And the vector network analyzer is connected with the vector network analyzer. In the first rf switch module, the control unit may control the function switch to determine whether to switch to the cascade mode. It should be noted that the vector network analyzer may include a plurality of first test ports; further, the first test port and the second test port may have the same function, and both may be used for outputting and receiving rf signals.
In one embodiment, the first selection switch unit includes a first primary stage changeover switch and a plurality of first final stage changeover switches.
The common port of the first primary diverter switch is connected to the first common port.
The common port of the first final-stage change-over switch is used for connecting a corresponding change-over port in the first primary-stage change-over switch; the switching ports of the first final-stage switches are connected with the first selection ports in a one-to-one correspondence manner.
Specifically, the first selection switch unit may be mainly composed of two stages of radio frequency switches. The public port of the first-stage radio frequency selector switch is connected with the first public port; the switching port of the last-stage radio frequency switch is connected with the corresponding first selection port, and the public port of the last-stage radio frequency switch is connected with the corresponding switching port in the first-stage radio frequency switch. Based on this, first selection switch unit accessible radio frequency change over switch carries out the construction, and its simple structure, and the switching layer level is few, avoids the increase of transmission loss.
In one example, the first primary diverter switch is a single pole, double throw radio frequency diverter switch and the first final diverter switch is a single pole, eight throw radio frequency diverter switch. The radio frequency switch module comprises 1 first primary stage change-over switch and 2 first final stage change-over switches. 2 switching ports of the first primary stage switching switch are respectively connected with a first final stage switching switch; the 2 first final-stage switches have 16 switching ports in total, and the 16 switching ports can be connected with the 16 first selection ports in a one-to-one correspondence.
In one example, the first primary diverter switch is a single-pole, four-throw radio frequency diverter switch and the first final diverter switch is a single-pole, four-throw radio frequency diverter switch. The radio frequency switch module comprises 1 first primary stage change-over switch and 4 first final stage change-over switches. The 4 switching ports of the first primary stage change-over switch are respectively connected with a first final stage change-over switch; the 4 first final-stage switches have 16 switching ports in total, and the 16 switching ports can be connected with the 16 first selection ports in a one-to-one correspondence manner.
In one embodiment, the first selection switch unit further includes a plurality of first mid-stage switches.
The common port of the first intermediate level switch is connected with the corresponding switch port of the first primary level switch. The common port of each first final stage change-over switch is connected with the switching port of each first middle stage change-over switch in a one-to-one correspondence mode.
In particular, a first intermediate stage changeover switch may also be provided between the first primary stage changeover switch and the first final stage changeover switch. The first mid-stage switches may be used to expand the number of first selected ports. The number of the first selection ports can be further expanded through the cascade arrangement of the radio frequency switches of the primary stage, the middle stage and the final stage. Illustratively, the radio frequency switch module may include 1 single double throw first primary diverter switch, 2 single pole four throw first mid-stage diverter switches, and 8 single pole four throw first final stage diverter switches; the first primary transfer switch is respectively connected with 2 first intermediate transfer switches, and simultaneously, 1 first intermediate transfer switch is respectively connected with 4 first final transfer switches, thereby forming 32 first selection ports in a matching manner. Based on this, the embodiment of the application can adopt a simple radio frequency switch to cooperate, and reduces the complexity and the cost of the unit.
In one example, as shown in fig. 7, the function switch and the rf switch are both single-pole double-throw switches, and each selection switch unit is composed of a single-pole double-throw switch, which can effectively reduce the complexity of the device. The radio frequency switch module is a switch module of 2 + 16+1 and has 16 radio frequency test ports (numbered as P in the figure) 1 To P 16 ) 1 calibration channel (or cascade channel) port (numbered P in the figure) 17 Common port P of the first selection switch unit A And a function switching port P B For connection to a vector network analyzer.
In one embodiment, the second selection switch unit includes a second primary stage changeover switch and a plurality of second final stage changeover switches.
The common port of the second primary diverter switch is connected to the second common port.
The common port of the second final-stage change-over switch is used for connecting a corresponding change-over port in the second primary-stage change-over switch; the switching ports of the second final-stage change-over switches are connected with the second selection ports in a one-to-one correspondence mode.
In one embodiment, the second selection switch unit further includes a plurality of second mid-stage switches.
The common port of the second intermediate level switch is connected with the corresponding switch port in the second primary level switch; and the common port of each second final-stage change-over switch is connected with the switching port of each second middle-stage change-over switch in a one-to-one correspondence manner.
For specific limitations of the second selection switch unit and its extended examples, reference may be made to the above description of the first selection switch unit, and repeated descriptions thereof are omitted here.
In one embodiment, the functional switch and the radio frequency switch are single pole double throw switches.
In one embodiment, the functional switch is a single pole, triple throw switch; and the third function port of the function changeover switch is used for short-circuiting the load.
Particularly, the function change-over switch can also be provided with a third function port for short-circuit load, and the test precision of the equipment is improved.
In one embodiment, the radio frequency switch is a single-pole, triple-throw switch; and a third switching port of the radio frequency switch is used for short-circuiting the load.
Specifically, the radio frequency switch can be further provided with a third switching port for short-circuiting the load, so that the test precision of the equipment is improved.
In one embodiment, there is provided an antenna test system comprising:
at least two radio frequency switch modules as described above;
and the vector network analyzer is used for connecting the antenna to be tested through each radio frequency switch module.
Particularly, the radio frequency switch modules are connected in a chain mode, so that all radio frequency ports of the antenna to be tested can be covered, the building process of the measuring system is simplified, the increase of transmission loss is avoided, and the measuring precision is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (9)
1. A radio frequency switch module, comprising:
the function switch comprises a function switching port, a first function port and a second function port; the function switching port is used for connecting a first test port of the vector network analyzer; the first function port is used for connecting a calibration port of an antenna to be tested, or connecting a next radio frequency switch module, or carrying out no-load setting;
a first selection switch unit including a first common port and N first selection ports; the first public port is used for connecting a second test port of the vector network analyzer or connecting a radio frequency switch module; the first public port is communicated with any one of the first selection ports;
a second selection switch unit including a second common port and N second selection ports; the second public port is connected with the second functional port; the second public port is communicated with any one of the second selection ports; the function changeover switch switches between the second selection switch unit and the second function port;
n radio frequency transfer switches; the radio frequency switch comprises a first switch port, a second switch port and a radio frequency public port; the N radio frequency public ports are used for being connected with the N radio frequency ports of the antenna to be tested in a one-to-one correspondence mode; the N first switching ports are connected with the N first selection ports in a one-to-one corresponding mode; the N second switching ports are connected with the N second selection ports in a one-to-one corresponding mode;
the function change-over switch and the radio frequency change-over switch are single-pole double-throw switches or single-pole multi-throw switches.
2. The radio frequency switch module of claim 1, further comprising:
and the control unit is respectively connected with the control port of the function selector switch, the control port of the first selector switch unit, the control port of the second selector switch unit and the control ports of the N radio frequency selector switches.
3. The radio frequency switch module of claim 1, wherein the first selection switch unit includes a first primary stage switch and a plurality of first final stage switches;
the public port of the first primary changeover switch is connected with the first public port;
the common port of the first final-stage change-over switch is used for connecting a corresponding switch port in the first primary-stage change-over switch; the switching ports of the first final-stage switches are connected to the first selection ports in a one-to-one correspondence manner.
4. The radio frequency switch module according to claim 3, wherein the first selection switch unit further comprises a plurality of first mid-stage switches;
a common port of the first intermediate level switch is connected with a corresponding switch port in the first primary level switch; and the common port of each first final-stage change-over switch is connected with the switching port of each first middle-stage change-over switch in a one-to-one correspondence mode.
5. The radio frequency switch module of claim 1, wherein the second selection switch unit includes a second primary stage switch and a plurality of second final stage switches;
the public port of the second primary selector switch is connected with the second public port;
the common port of the second final-stage change-over switch is used for connecting a corresponding change-over port in the second primary-stage change-over switch; the switching ports of the second final-stage switches are connected to the second selection ports in a one-to-one correspondence.
6. The radio frequency switch module according to claim 5, wherein the second selection switch unit further comprises a plurality of second mid-stage switches;
the common port of the second intermediate-stage change-over switch is connected with the corresponding change-over port in the second primary-stage change-over switch; and the common port of each second final-stage change-over switch is connected with the switching port of each second middle-stage change-over switch in a one-to-one correspondence manner.
7. The RF switch module according to any one of claims 1 to 6, wherein if the function switch is a single-pole-three-throw switch;
and a third function port of the function change-over switch is used for short-circuiting the load.
8. The RF switch module according to any one of claims 1 to 6, wherein if the RF switch is a single-pole triple-throw switch;
and a third switching port of the radio frequency switch is used for short-circuiting a load.
9. An antenna test system, comprising:
at least two radio frequency switch modules according to any one of claims 1 to 8;
and the vector network analyzer is used for connecting the antenna to be tested through each radio frequency switch module.
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| CN111917605A (en) * | 2020-07-28 | 2020-11-10 | 苏州浪潮智能科技有限公司 | PCIE signal test fixture and data path gating test system thereof |
| CN112996033B (en) * | 2021-01-18 | 2022-07-12 | 讯喆微电子(合肥)有限公司 | Automatic test system of 5G radio frequency PA |
| CN114665268B (en) * | 2022-05-26 | 2022-12-27 | 广东福顺天际通信有限公司 | Intelligent multi-beam luneberg lens antenna |
| CN117811679A (en) * | 2022-09-30 | 2024-04-02 | 上海华为技术有限公司 | Method, device and communication system for antenna correction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9685946B2 (en) * | 2015-01-30 | 2017-06-20 | Peregrine Semiconductor Corporation | Radio frequency switching circuit with distributed switches |
| WO2017073509A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社村田製作所 | Switch module |
| CN205160550U (en) * | 2015-12-08 | 2016-04-13 | 成都天大仪器设备有限公司 | Multiport testing arrangement |
| CN206370835U (en) * | 2016-12-16 | 2017-08-01 | 苏州永安丰新能源科技有限公司 | A kind of radio frequency testing self-checking device |
| CN110114979A (en) * | 2016-12-22 | 2019-08-09 | 株式会社村田制作所 | HF switch and communication device |
| CN107991541B (en) * | 2017-11-27 | 2020-04-21 | 中国电子科技集团公司第三十八研究所 | Near-field antenna test control device and test method thereof |
| CN108599779B (en) * | 2018-03-16 | 2020-03-10 | Oppo广东移动通信有限公司 | Wireless communication device with multiple-way selector switch |
| CN110286347B (en) * | 2019-06-19 | 2021-08-24 | 华南理工大学 | Electronic calibration piece, calibration system, method, device and storage medium |
| CN110261687B (en) * | 2019-06-19 | 2021-01-15 | 华南理工大学 | Large-scale array antenna measurement system, method, device and storage medium |
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