CN113866540A - Radio frequency device test method and device - Google Patents
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Abstract
The invention discloses a method and a device for testing a radio frequency device, which relate to the field of device reliability tests, and comprise the following steps: sequentially connecting the radio frequency devices 1 to n to be tested according to the serial number sequence, multiplexing radio frequency excitation signals, wherein the connection mode between 2 radio frequency devices to be tested with adjacent serial numbers is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; connecting the output end of a radio frequency signal excitation source with the radio frequency input end of the radio frequency device 1 to be tested; connecting the radio frequency output end of the radio frequency device n to be tested with a load; starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing; the invention can effectively reduce the cost of the radio frequency device test.
Description
Technical Field
The invention relates to the field of device reliability tests, in particular to a radio frequency device test method and a radio frequency device test device.
Background
According to international JEDEC standards, in HTOL tests in reliability tests of radio frequency devices or modules, a device to be verified is generally operated under the condition of maximum DC bias, the ambient temperature is raised to the condition of the highest operating temperature, and the reliability test of high-temperature band DC bias is carried out for 1000 hours.
Meanwhile, according to the requirements of the JESD226 standard, for some radio frequency devices, RFBL tests with radio frequency signal excitation are required. And each device needs to be subjected to a screening test of high-temperature band radio frequency signal excitation. The reliability test with radio frequency signal excitation RFBL is high in cost, mainly because the test requires a plurality of (usually 11 to 77 unequal) devices to be verified simultaneously for a long time (usually 1000 hours), and radio frequency signal equipment required for generating a radio frequency excitation signal is usually composed of a radio frequency signal source, a radio frequency amplifier, a radio frequency power divider, a radio frequency cable and the like, so that the cost for generating the required radio frequency excitation signal is high.
In a traditional RFBL test of a single device to be verified, the input is supplied by an independent radio frequency excitation signal, and the output is connected with a 50Ohm load, so that a precious radio frequency excitation signal is completely dissipated on the 50Ohm load after passing through a single-stage device to be verified, and the waste of precious radio frequency excitation signal resources exists. For high-reliability radio frequency devices with large-batch supply requirements, a screening test of 100% high-temperature band radio frequency signal excitation is required, and the screening cost and the production capacity face challenges.
Referring to fig. 1-2, fig. 1-2 illustrate a first method for testing a radio frequency device in a conventional manner, in which a radio frequency device to be tested is a three-port passive radio frequency device (here, a radio frequency power divider); two radio frequency devices 1-2 to be tested respectively need a set of radio frequency signal excitation, and each radio frequency signal excitation source consists of a signal source and an amplifier. It can be seen that most of the rf signals are finally dissipated in R1, R2, R3 and R4 (usually 50Ohm loads), which results in waste of rf signal resources, and if a plurality of rf devices to be tested need to be excited by a plurality of sets of rf signals, each set of equipment wastes a large amount of rf signals.
Referring to fig. 3, fig. 3 is a diagram illustrating a second method for testing a radio frequency device in the prior art, in which a radio frequency device to be tested is a three-port passive radio frequency device (here, a radio frequency power divider); two radio frequency devices 3-4 to be tested share one set of radio frequency signal excitation. The radio frequency signal excitation source is composed of a radio frequency signal source, a radio frequency amplifier and a power divider. The second method uses less components than the first method, but because a rf power divider is used to distribute the power of the rf excitation signal, the rf amplifier needs to provide a larger (at least 3dB or more) rf signal power than the scheme of fig. 1. And most of the rf signal is still eventually dissipated at R5, R6, R7 and R8 (typically 50Ohm load).
In summary, the existing radio frequency device testing method has the technical problems that multiple sets of radio frequency signals are needed to be excited, the cost is high, and a large number of radio frequency signals are wasted on multiple loads after passing through a single-stage device to be verified, or the technical problems that the power of radio frequency excitation signals needs to be greatly improved, a large number of radio frequency signals are wasted on multiple loads, and the cost is high.
In order to solve the above problems, it is necessary to adopt a new rf device testing method and apparatus, so as to effectively utilize the valuable rf excitation signal resources, and reduce the rf excitation signal waste on multiple loads.
Disclosure of Invention
The invention provides a method and a device for testing a radio frequency device, and aims to reduce the cost of testing the radio frequency device.
In order to achieve the above object, the present invention provides two testing methods for a radio frequency device according to the number of output paths of a radio frequency signal excitation source, wherein when the number of output paths of the radio frequency signal excitation source is 1, the testing method for a radio frequency device in the present invention comprises:
sequentially connecting a radio frequency device 1 to be tested to a radio frequency device n to be tested according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and n is an integer greater than or equal to 2;
connecting the output end of a radio frequency signal excitation source with the radio frequency input end of the radio frequency device 1 to be tested;
connecting the radio frequency output end of the radio frequency device n to be tested with a load;
and starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing.
The first method is based on the following principle: according to the method, a plurality of radio frequency devices to be verified are in cascade connection, precious radio frequency excitation signals are multiplexed, a large number of radio frequency excitation signals can be prevented from being wasted on a plurality of loads, and the cost of a reliability test RFBL with radio frequency signal excitation and the cost of a high-temperature screening test with radio frequency signal excitation can be greatly reduced.
In the first method, the cascading of the plurality of radio frequency devices to be verified specifically includes: and sequentially connecting a plurality of radio frequency devices to be tested, wherein the input of the first radio frequency device to be tested is connected with a radio frequency signal excitation source, the output of the first radio frequency device to be tested is connected with the input of the next radio frequency device to be tested, and the like until the input of the last radio frequency device to be tested is connected, the output of the last radio frequency device to be tested is connected with a load, and the load is grounded.
In the first method, the radio frequency excitation signals can simultaneously meet the use requirements of a plurality of radio frequency devices to be verified in a cascading mode, a plurality of sets of radio frequency signals are not required to be excited, a radio frequency amplifier is not required to provide larger radio frequency signal power, the radio frequency signals are multiplexed in the plurality of radio frequency devices to be verified, a large number of radio frequency signals are not wasted on a plurality of loads, and the cost of the method is lower.
The rf signal driver in the first method outputs only one signal, so that the rf signal driver in the first method does not require a power divider, and the rf signal driver includes an rf signal source and an rf amplifier that are connected to each other. The radio frequency signal excitation source in the method does not comprise a power divider, and the power of the radio frequency excitation signal is not required to be greatly improved because a plurality of radio frequency devices to be verified are excited, so the method has low cost.
The invention provides a second radio frequency device test method, wherein when the output paths of radio frequency signal excitation sources are in multiple paths, the radio frequency device test method comprises the following steps:
connecting m-n radio frequency devices to be tested to obtain m groups of mutually independent radio frequency device groups to be tested; each group of radio frequency device groups to be tested comprises radio frequency devices 1 to n to be tested which are sequentially connected according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and m and n are integers greater than or equal to 2;
the radio frequency signal excitation source is provided with m radio frequency excitation signal output ends, each radio frequency excitation signal output end is correspondingly connected with the input end of one radio frequency device group to be tested, and the output end of each radio frequency device group to be tested is connected with a corresponding load;
and starting the radio frequency signal excitation source to generate m paths of radio frequency excitation signals, and respectively inputting the m paths of radio frequency excitation signals into the m groups of radio frequency device groups to be tested for testing.
Wherein the principle of the second method is as follows: according to the method, a plurality of radio frequency devices to be verified are in cascade connection, precious radio frequency excitation signals are multiplexed, a large number of radio frequency excitation signals can be prevented from being wasted on a load, and the cost of a reliability test RFBL with radio frequency signal excitation and the cost of a high-temperature screening test with radio frequency signal excitation can be greatly reduced.
In the second method, the cascading of the plurality of radio frequency devices to be verified specifically includes: and sequentially connecting a plurality of radio frequency devices to be tested, wherein the input of the first radio frequency device to be tested is connected with a radio frequency signal excitation source, the output of the first radio frequency device to be tested is connected with the input of the next radio frequency device to be tested, and the like until the input of the last radio frequency device to be tested is connected, the output of the last radio frequency device to be tested is connected with a load, and the load is grounded.
In the second method, the radio frequency excitation signals can simultaneously meet the use requirements of a plurality of radio frequency devices to be verified in a cascading mode, a plurality of sets of radio frequency signals are not required to be excited, the radio frequency excitation signals are multiplexed in the plurality of radio frequency devices to be verified, a large number of radio frequency signals are not wasted on loads, and the method is low in cost.
The radio frequency signal excitation source in the second method can output multi-channel signals, and can simultaneously test m x n radio frequency devices to be tested, so that the efficiency is higher, and the cost is lower.
Preferably, in the second method, the rf signal excitation source includes, connected in sequence: the radio frequency signal source, the radio frequency amplifier and the power divider, or the radio frequency signal excitation source comprises: a radio frequency signal source, a radio frequency amplifier and a switch. The single-path radio frequency excitation signal can be divided into multiple paths of radio frequency excitation signals through the power divider and the switch, and the use of multiple paths of test lines is met.
Preferably, in the first method or the second method, the method further comprises:
and adjusting the power of the radio frequency excitation signal according to the number of the radio frequency devices to be tested, so that the power of the input radio frequency excitation signal input into the radio frequency device n to be tested meets the working requirement of the radio frequency device n to be tested.
Each stage of radio frequency devices to be tested in the cascade has self insertion loss, so that the input power of the first stage needs to be considered to be proper when the stages are cascaded, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the test requirement.
Preferably, in the first method or the second method, the method further comprises:
and replacing the load with a radio frequency excitation signal detection device, wherein the radio frequency excitation signal detection device is used for detecting whether the output radio frequency excitation signal of the radio frequency device n to be tested is normal or not.
If a radio frequency device to be tested of a certain stage of multistage cascade connection fails in the test, the radio frequency excitation signal cannot normally reach the next stage, and the subsequent radio frequency device to be tested cannot achieve the test effect, so the cascade number cannot be infinitely increased, the corresponding cascade number is usually set according to the test requirement, and in order to avoid the above situation, the method is correspondingly improved, the load of the last stage is replaced by the radio frequency excitation signal detection device, and the radio frequency excitation signal is detected in real time and is ensured to normally pass through the cascade devices of each stage.
Preferably, in the first method or the second method, the test is a reliability test, and the test conditions of the radio frequency device test method are as follows: the radio frequency device to be tested works under the maximum bias voltage, the test environment temperature is the rated maximum working temperature of the radio frequency device to be tested, and the test duration is the preset duration.
It is because the test conditions of this type of test in the method are strict and the test duration is long, which leads to the condition that the cost is high, and therefore, the method is improved correspondingly for reducing the cost.
Corresponding to the first method in the invention, the invention also provides a first radio frequency device testing device, which comprises:
the radio frequency signal excitation source, a plurality of radio frequency connecting wires and a load;
the radio frequency connecting line is used for sequentially connecting the radio frequency device 1 to be tested to the radio frequency device n to be tested according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and n is an integer greater than or equal to 2;
the output end of the radio frequency signal excitation source is connected with the radio frequency input end of the radio frequency device to be tested 1 through the radio frequency connecting line; the radio frequency output end of the radio frequency device n to be tested is connected with a load through the radio frequency connecting line;
the radio frequency signal excitation source is used for generating a radio frequency excitation signal.
Corresponding to the second method in the invention, the invention also provides a second radio frequency device testing device, which comprises:
the radio frequency signal excitation source, a plurality of radio frequency connecting wires and a load;
the radio frequency connecting lines are used for connecting m-x-n radio frequency devices to be tested to obtain m groups of mutually independent radio frequency device groups to be tested; each group of radio frequency device groups to be tested comprises radio frequency devices 1 to n to be tested which are sequentially connected according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and m and n are integers greater than or equal to 2;
the radio frequency signal excitation source is used for generating m paths of radio frequency excitation signals, the radio frequency signal excitation source is provided with m radio frequency excitation signal output ends, each radio frequency excitation signal output end is correspondingly connected with the input end of one radio frequency device group to be tested through the radio frequency connecting line, and the output end of each radio frequency device group to be tested is connected with a corresponding load through the radio frequency connecting line.
The radio frequency connecting line is a radio frequency cable, a radio frequency transmission line, a printed circuit radio frequency microstrip line, a coplanar waveguide line or a waveguide.
In the first device, the rf signal driver includes an rf signal source and an rf amplifier connected to each other.
In the second device, the rf signal excitation source includes, connected in sequence: the radio frequency signal source, the radio frequency amplifier and the power divider, or the radio frequency signal excitation source comprises: a radio frequency signal source, a radio frequency amplifier and a switch.
In the first or second apparatus, the load is a radio frequency excitation signal detection apparatus, and the radio frequency excitation signal detection apparatus is configured to detect whether an output radio frequency excitation signal of the radio frequency device n to be tested is normal.
The invention also provides a radio frequency device test method, which comprises the following steps:
dividing a plurality of radio frequency devices to be tested into p test stages including 1 st to p-th test stages, wherein each test stage comprises at least one radio frequency device to be tested, and p is an integer greater than or equal to 2;
connecting p test stages, wherein the output of the radio frequency device to be tested in the previous test stage is the input of the radio frequency device to be tested in the next test stage;
connecting the output end of a radio frequency signal excitation source with the radio frequency input end of a radio frequency device to be tested in the 1 st-level test level;
connecting the radio frequency output end of the radio frequency device to be tested in the p-th test stage with a load;
starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing;
the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, and the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other.
The method divides the radio frequency device to be tested into a plurality of test stages, each test stage comprises at least one radio frequency device to be tested, the output of the radio frequency device to be tested in the previous test stage is the input of the radio frequency device to be tested in the next test stage, and therefore radio frequency excitation signals can be multiplexed in the multistage radio frequency devices to be tested, and waste caused by the fact that a large number of radio frequency excitation signals are dissipated on more loads is avoided.
In the method, the load can be replaced by a radio frequency excitation signal detection device, and the radio frequency excitation signal detection device is used for detecting whether the output radio frequency excitation signal of the radio frequency device to be tested in the p-th test stage is normal or not.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
according to the method, a plurality of radio frequency devices to be verified multiplex precious radio frequency signal excitation signals in a cascading mode, so that waste caused by the fact that a large number of radio frequency excitation signals are dissipated on more loads can be avoided, and the cost of a reliability test RFBL with radio frequency signal excitation and the cost of a high-temperature screening test with radio frequency signal excitation can be greatly reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
fig. 1-2 are schematic diagrams illustrating a first method for testing a radio frequency device in a conventional manner;
FIG. 3 is a schematic diagram illustrating a second testing method for RF devices in a conventional manner;
FIG. 4 is a schematic diagram of the method according to one embodiment;
FIG. 5 is a schematic illustration of the method according to the second embodiment;
FIG. 6 is a schematic diagram of the method when the load is the RF excitation signal detecting device;
FIG. 7 is a schematic diagram of the method when the RF device to be tested is two-port;
FIG. 8 is a schematic diagram of the method when the RF device to be tested is a three-port RF switch;
FIG. 9 is a schematic diagram of the method when the RF device to be tested is multi-port;
FIG. 10 is a schematic diagram of the method with multiple sets of RF devices under test;
FIG. 11 is a schematic diagram of a multi-stage RF device testing method with a first stage device count of 1;
FIG. 12 is a schematic diagram of a multi-stage RF device testing method when the number of first-stage devices is multiple,
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Example one
Referring to fig. 4, an embodiment of the present invention provides a method for testing a radio frequency device, including a radio frequency device 1 to be tested and a radio frequency device 2 to be tested, which share a set of radio frequency signal excitation. The radio frequency signal driving source is composed of a radio frequency signal source and a radio frequency amplifier.
Compared with the technical scheme in the prior art, the radio frequency excitation source uses the minimum devices, only one radio frequency signal source and one radio frequency amplifier are needed, and the radio frequency amplifier does not need to provide larger radio frequency signal power. The rf amplifier of this embodiment outputs an rf excitation signal power of 30dBm, which is greater (at least 3dB greater) than that required by the rf amplifier of fig. 3 to achieve the same experimental conditions.
The excitation input of the rf device 2 to be tested is the excitation output of the rf device 1 to be tested, the rf excitation signals are multiplexed, and most of the rf excitation signals are finally dissipated in only one load R9 (typically a 50Ohm load). The size of the load R9 can be flexibly adjusted according to actual needs, and this embodiment is not particularly limited.
The radio frequency device 1 to be tested and the radio frequency device 2 to be tested in the invention both comprise at least one radio frequency input end and at least one radio frequency output end, and the respective radio frequency input ends and the respective radio frequency output ends can be switched with each other, wherein the radio frequency input ends can be switched into the radio frequency output ends according to setting or requirements by mutual tangency switching, and similarly, the radio frequency output ends can be switched into the radio frequency input ends according to setting or requirements.
The radio frequency device to be tested in the invention can be a radio frequency chip or a radio frequency module, and the embodiment of the invention does not limit the specific model or type of the radio frequency device to be tested.
Example two
Referring to fig. 5, a second embodiment of the present invention provides a method for testing a radio frequency device, where the method includes two or more radio frequency devices to be tested, and the radio frequency devices to be tested share a set of radio frequency signal excitation. The radio frequency signal excitation source consists of a radio frequency signal source and a radio frequency amplifier; the more cascade stages, the higher the utilization rate of the excitation signal, and the more remarkable the cost reduction of the radio frequency signal excitation source; when the cascade stage number is doubled, the cost of the radio frequency signal excitation source is approximately halved compared with the scheme in the prior art; the radio frequency excitation signal input of the next-stage radio frequency device to be tested is the radio frequency excitation signal output of the previous-stage radio frequency device to be tested, the radio frequency excitation signals are multiplexed to the maximum extent, and most of the radio frequency excitation signals are finally dissipated on only one load R10 (usually a 50Ohm load); the size of the load R10 can be flexibly adjusted according to actual needs, and this embodiment is not particularly limited.
Because each stage of radio frequency device to be tested has self insertion loss, when the stages are cascaded, the input power of the radio frequency excitation signal of the first stage needs to be considered to be proper, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the requirement. Generally, the number of the cascades is 4 to 8 stages, and the number of the cascades can be adjusted according to needs in practical application, and the embodiment of the invention does not specifically limit the number of the cascades.
EXAMPLE III
Referring to fig. 6, in a third embodiment of the present invention, a load is replaced with a radio frequency excitation signal detection device based on the second embodiment. If a fault occurs in a certain one-stage device of the multistage cascade during the test, the radio frequency excitation signal cannot normally reach the next stage, and the subsequent device cannot achieve the test effect; therefore, the number of cascade stages cannot be increased infinitely; in order to avoid the above situation, in the third embodiment, the load at the last stage is replaced with the radio frequency excitation signal detection device, so as to detect and ensure that the radio frequency excitation signal normally passes through the cascade devices at each stage in real time.
Example four
Referring to fig. 7, on the basis of the second embodiment, the to-be-tested rf device in this embodiment is a two-port to-be-tested rf device, and in this embodiment, two or more 2-port to-be-tested rf devices share one set of rf signal excitation. The radio frequency signal excitation source consists of a radio frequency signal source and a radio frequency amplifier; the more cascade stages, the higher the utilization rate of the radio frequency excitation signal, and the more remarkable the cost reduction of the radio frequency signal excitation source.
The radio frequency excitation signal input of the next-stage radio frequency device to be tested is the radio frequency excitation signal output of the previous-stage radio frequency device to be tested, the radio frequency excitation signals are multiplexed to the maximum extent, and most of the radio frequency excitation signals are finally dissipated on only one load R11 (usually a 50Ohm load); the size of the load R11 can be flexibly adjusted according to actual needs, and this embodiment is not particularly limited.
Each stage of radio frequency device to be tested has self insertion loss, so that when the stages are cascaded, the proper input power of the radio frequency excitation signal of the first stage needs to be considered, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the requirement.
EXAMPLE five
Referring to fig. 8, on the basis of the second embodiment, the rf device to be tested in this embodiment is an rf switch device to be tested, and in this embodiment, more than two 1-in-2 rf switch devices to be tested share one set of rf signal excitation. The radio frequency signal excitation source consists of a radio frequency signal source and a radio frequency amplifier; the more cascade stages of the radio frequency devices to be tested are, the higher the utilization rate of the radio frequency excitation signals is, and the more remarkable the cost reduction of the radio frequency signal excitation source is; the radio frequency excitation signal input of the next-stage radio frequency device to be tested is the radio frequency excitation signal output of the previous-stage radio frequency device to be tested, the radio frequency excitation signals are multiplexed to the maximum extent, and most radio frequency signals are only dissipated on a signal detector (usually a 50Ohm load) finally.
Each stage of radio frequency device to be tested has self insertion loss, so that when the stages are cascaded, the input power of the first stage needs to be considered to be proper, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the requirement; the upper branch and the lower branch of all the pieces to be tested of the radio frequency switch can be switched simultaneously during testing, so that the radio frequency excitation signal can be transmitted from the first stage to the last stage, and the radio frequency excitation signal detector can detect whether the radio frequency excitation signal is normally transmitted or not in real time; and the embodiment can be extended to a 1-minute-N switch, where N > is 1.
The to-be-tested piece of each stage of the to-be-tested radio frequency switch has self insertion loss, so that the proper input power of the radio frequency excitation signal of the first stage needs to be considered when the stages are cascaded, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the test requirement.
EXAMPLE six
Referring to fig. 9, on the basis of the second embodiment, the rf device to be tested in this embodiment is a multi-port rf device to be tested, and in this embodiment, there are 2 input rf ports and 3 output rf ports, which share one set of rf signal excitation. The radio frequency signal excitation source consists of a radio frequency signal source, a radio frequency amplifier and a 1-to-2 power divider; the more cascade stages of the radio frequency devices to be tested are, the higher the utilization rate of the excitation signals is, and the more remarkable the cost reduction of the radio frequency signal excitation source is.
The excitation input of the next-stage radio frequency device to be tested is the excitation output of the previous-stage radio frequency device to be tested, the radio frequency excitation signals are multiplexed to the maximum extent, and most of the radio frequency excitation signals are only dissipated on R12 and R13 (usually 50Ohm load); the sizes of the loads R12 and R13 may be flexibly adjusted according to actual needs, and this embodiment is not particularly limited.
Each stage of radio frequency device to be tested has self insertion loss, so that when the stages are cascaded, the proper input power of the radio frequency excitation signal of the first stage needs to be considered, and the power of the radio frequency excitation signal reaching the last stage is ensured to meet the requirement.
In the present embodiment, there are 2 ports, but there may be any M ports, where M > is 1; the output of the embodiment has 3 ports, but may be any N ports, where N > is 1; the input port and the output port of the radio frequency device to be tested can be reciprocal.
EXAMPLE seven
Referring to fig. 10, fig. 10 is a schematic diagram of the method when there are multiple sets of rf devices to be tested, the method includes:
connecting m-n radio frequency devices to be tested to obtain m groups of mutually independent radio frequency device groups to be tested; each group of radio frequency device groups to be tested comprises radio frequency devices 1 to n to be tested which are sequentially connected according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and m and n are integers greater than or equal to 2;
the radio frequency signal excitation source is provided with m radio frequency excitation signal output ends, each radio frequency excitation signal output end is correspondingly connected with the input end of one radio frequency device group to be tested, and the output end of each radio frequency device group to be tested is connected with a corresponding load;
and starting the radio frequency signal excitation source to generate m paths of radio frequency excitation signals, and respectively inputting the m paths of radio frequency excitation signals into the m groups of radio frequency device groups to be tested for testing.
The radio frequency excitation signal input of the radio frequency device to be tested at the next stage in each group of the radio frequency device group to be tested is the radio frequency excitation signal output of the radio frequency device to be tested at the previous stage, the radio frequency excitation signals are multiplexed to the maximum extent, and most of the radio frequency excitation signals are finally dissipated on the load of the radio frequency device group to be tested, such as R14, R15 and the like (usually 50Ohm load); the size of the load can be flexibly adjusted according to actual needs, and the embodiment is not specifically limited.
Wherein, in the embodiment, the specific numbers of m and n can be flexibly adjusted according to the actual requirement,
in this embodiment, the radio frequency signal excitation source includes, connected in sequence: the radio frequency signal source, the radio frequency amplifier and the power divider, or the radio frequency signal excitation source comprises: a radio frequency signal source, a radio frequency amplifier and a switch. The radio frequency excitation signal is shunted using a power divider or switch.
In the embodiment, the connection among the rf signal excitation source, the rf device to be tested, and the load is connected by the rf connection line. The connections between the radio frequency devices to be tested are also connected by radio frequency connecting lines.
The radio frequency connecting line in the embodiment of the invention is a radio frequency cable, a radio frequency transmission line, a printed circuit radio frequency microstrip line, a coplanar waveguide line or a waveguide. The invention is not limited to the specific implementation type of the radio frequency connection line.
Example eight
Referring to fig. 11 to 12, fig. 11 is a schematic diagram illustrating a method for testing a multi-stage rf device when the number of first-stage devices is 1, and fig. 12 is a schematic diagram illustrating a method for testing a multi-stage rf device when the number of first-stage devices is multiple, in an eighth embodiment of the present invention, there is provided a method for testing an rf device, the method includes:
dividing a plurality of radio frequency devices to be tested into p test stages including 1 st to p-th test stages, wherein each test stage comprises at least one radio frequency device to be tested, and p is an integer greater than or equal to 2;
connecting p test stages, wherein the output of the radio frequency device to be tested in the previous test stage is the input of the radio frequency device to be tested in the next test stage;
connecting the output end of a radio frequency signal excitation source with the radio frequency input end of a radio frequency device to be tested in the 1 st-level test level;
connecting the radio frequency output end of the radio frequency device to be tested in the p-th test stage with a load;
starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing;
the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, and the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other.
The method divides the radio frequency device to be tested into a plurality of test stages, each test stage comprises at least one radio frequency device to be tested, the output of the radio frequency device to be tested in the previous test stage is the input of the radio frequency device to be tested in the next test stage, and therefore radio frequency excitation signals can be multiplexed in the multistage radio frequency devices to be tested, and a large number of radio frequency excitation signals are prevented from being wasted on more loads.
In this embodiment, the number of partitions of the test level may be adjusted in an actual situation according to needs, and this embodiment is not particularly limited.
The number of the radio frequency devices to be tested in each test stage can be adjusted according to the requirements, the invention is not particularly limited, when the number of the first test stages is multiple, a radio frequency signal excitation source is required to generate a plurality of paths of radio frequency excitation signals, and a 1-minute multi-multiplexer or a 1-minute multi-switch can be arranged in the radio frequency signal excitation source.
The size of the load may be adjusted according to actual needs, and this embodiment is not specifically limited.
The load may be a radio frequency excitation signal detection device, and the radio frequency excitation signal detection device is configured to detect whether an output radio frequency excitation signal of the radio frequency device to be tested in the p-th stage test stage is normal.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for testing a radio frequency device, the method comprising:
sequentially connecting a radio frequency device 1 to be tested to a radio frequency device n to be tested according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and n is an integer greater than or equal to 2;
connecting the output end of a radio frequency signal excitation source with the radio frequency input end of the radio frequency device 1 to be tested;
connecting the radio frequency output end of the radio frequency device n to be tested with a load;
and starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing.
2. The radio frequency device testing method according to claim 1, wherein the radio frequency signal excitation source comprises a radio frequency signal source and a radio frequency amplifier connected to each other.
3. A method for testing a radio frequency device, the method comprising:
connecting m-n radio frequency devices to be tested to obtain m groups of mutually independent radio frequency device groups to be tested; each group of radio frequency device groups to be tested comprises radio frequency devices 1 to n to be tested which are sequentially connected according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and m and n are integers greater than or equal to 2;
the radio frequency signal excitation source is provided with m radio frequency excitation signal output ends, each radio frequency excitation signal output end is correspondingly connected with the input end of one radio frequency device group to be tested, and the output end of each radio frequency device group to be tested is connected with a corresponding load;
and starting the radio frequency signal excitation source to generate m paths of radio frequency excitation signals, and respectively inputting the m paths of radio frequency excitation signals into the m groups of radio frequency device groups to be tested for testing.
4. A radio frequency device testing method according to claim 3, wherein the radio frequency signal excitation source comprises, connected in sequence: the radio frequency signal source, the radio frequency amplifier and the power divider, or the radio frequency signal excitation source comprises: a radio frequency signal source, a radio frequency amplifier and a switch.
5. A radio frequency device testing method according to claim 1 or 3, characterized in that the method further comprises:
and adjusting the power of the radio frequency excitation signal according to the number of the radio frequency devices to be tested, so that the power of the input radio frequency excitation signal input into the radio frequency device n to be tested meets the working requirement of the radio frequency device n to be tested.
6. A radio frequency device testing method according to claim 1 or 3, characterized in that the method further comprises:
and replacing the load with a radio frequency excitation signal detection device, wherein the radio frequency excitation signal detection device is used for detecting whether the output radio frequency excitation signal of the radio frequency device n to be tested is normal or not.
7. A radio frequency device testing method according to claim 1 or 3, wherein the test is a reliability test, and the test conditions of the radio frequency device testing method are: the radio frequency device to be tested works under the maximum bias voltage, the test environment temperature is the rated maximum working temperature of the radio frequency device to be tested, and the test duration is the preset duration.
8. Radio frequency device testing apparatus, characterized in that the apparatus comprises:
the radio frequency signal excitation source, a plurality of radio frequency connecting wires and a load;
the radio frequency connecting line is used for sequentially connecting the radio frequency device 1 to be tested to the radio frequency device n to be tested according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and n is an integer greater than or equal to 2;
the output end of the radio frequency signal excitation source is connected with the radio frequency input end of the radio frequency device to be tested 1 through the radio frequency connecting line; the radio frequency output end of the radio frequency device n to be tested is connected with a load through the radio frequency connecting line;
the radio frequency signal excitation source is used for generating a radio frequency excitation signal.
9. Radio frequency device testing apparatus, characterized in that the apparatus comprises:
the radio frequency signal excitation source, a plurality of radio frequency connecting wires and a load;
the radio frequency connecting lines are used for connecting m-x-n radio frequency devices to be tested to obtain m groups of mutually independent radio frequency device groups to be tested; each group of radio frequency device groups to be tested comprises radio frequency devices 1 to n to be tested which are sequentially connected according to the serial number sequence; the connection mode between the 2 radio frequency devices to be tested which are numbered adjacently is as follows: the radio frequency output end of the radio frequency device to be tested with the serial number in the front is connected with the radio frequency input end of the radio frequency device to be tested with the serial number in the back; the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other, and m and n are integers greater than or equal to 2;
the radio frequency signal excitation source is used for generating m paths of radio frequency excitation signals, the radio frequency signal excitation source is provided with m radio frequency excitation signal output ends, each radio frequency excitation signal output end is correspondingly connected with the input end of one radio frequency device group to be tested through the radio frequency connecting line, and the output end of each radio frequency device group to be tested is connected with a corresponding load through the radio frequency connecting line.
10. A radio frequency device testing apparatus according to claim 8 or 9, wherein the radio frequency connection line is a radio frequency cable or a radio frequency transmission line or a printed circuit radio frequency microstrip line or a coplanar waveguide line or a waveguide.
11. A method for testing a radio frequency device, the method comprising:
dividing a plurality of radio frequency devices to be tested into p test stages including 1 st to p-th test stages, wherein each test stage comprises at least one radio frequency device to be tested, and p is an integer greater than or equal to 2;
connecting p test stages, wherein the output of the radio frequency device to be tested in the previous test stage is the input of the radio frequency device to be tested in the next test stage;
connecting the output end of a radio frequency signal excitation source with the radio frequency input end of a radio frequency device to be tested in the 1 st-level test level;
connecting the radio frequency output end of the radio frequency device to be tested in the p-th test stage with a load;
starting the radio frequency signal excitation source to generate a radio frequency excitation signal for testing;
the radio frequency device to be tested comprises at least one radio frequency input end and at least one radio frequency output end, and the radio frequency input end and the radio frequency output end of the radio frequency device to be tested can be switched with each other.
12. The radio frequency device testing method of claim 11, further comprising:
the load is a radio frequency excitation signal detection device, and the radio frequency excitation signal detection device is used for detecting whether an output radio frequency excitation signal of the radio frequency device to be tested in the p-th-stage test stage is normal.
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