A transmitter and automatic test equipment with S parameter measurement function

Abstract

The application relates to a transmitter with S parameter measurement function and automatic test equipment, comprising a frequency generating circuit, a frequency conversion filtering circuit, a radio frequency gain control circuit, a vector signal measurement circuit and a multi-port switching circuit connected in sequence, and a local oscillation circuit, wherein the local oscillation circuit is connected with the frequency conversion filtering circuit, and the local oscillation circuit is also connected with the vector signal measurement circuit. The transmitter provided by the application has the characteristics of super large bandwidth, low stray, wide dynamic frequency range, and has the function of testing complex network parameters.

Description

Technical Field

[0001] This application relates to the field of radio frequency chip testing, and in particular to a transmitter and automatic testing equipment with S-parameter measurement function. Background Technology

[0002] With the booming development of the integrated circuit industry, SOC chips are gradually moving towards higher integration and greater functional diversity, which places higher demands on Automated Test Equipment (ATE). As a key component in RF ATE equipment, the transmitter needs to simultaneously meet performance indicators such as ultra-wide operating frequency band, wide dynamic range, and low spurious emissions, and also support the measurement of complex network parameters (such as S-parameters) to adapt to the diverse testing needs of RF chips.

[0003] However, current RF ATE equipment transmitters primarily focus on improving a single performance metric, failing to address multiple performance indicators and functions simultaneously, resulting in limited functionality. Furthermore, the circuit structure of current RF ATE transmitters is generally single-channel, making it difficult to support multi-port, high-volume synchronous testing, thus limiting throughput. Utility Model Content

[0004] In view of the above-mentioned problems of the prior art, this application provides a transmitter and automatic test equipment with S-parameter measurement function. In addition to having ultra-large bandwidth, low spurious emissions, and wide dynamic range, it can also measure complex network parameters (such as S-parameters). Furthermore, the transmitter provided by this application supports synchronous testing of multi-port, large batch of devices under test, thereby improving throughput.

[0005] To achieve the above objectives, the first aspect of this application provides a transmitter with S-parameter measurement functionality, comprising: a frequency generation circuit, a frequency conversion filter circuit, an RF gain control circuit, a vector signal measurement circuit, a local oscillator circuit, and a multi-port switching circuit; the frequency generation circuit generates signals of a first frequency and a second frequency and outputs them to its first output terminal and second output terminal; wherein the first frequency is higher than the second frequency; the first input terminal and the second input terminal of the frequency conversion filter circuit are respectively connected to the first output terminal and the second output terminal of the frequency generation circuit, and are used to mix and convert the first frequency signal received through its first input terminal with the first output signal of the local oscillator circuit to obtain a signal of a third frequency, and selectively output the third frequency signal and the second frequency signal received through the second input terminal to its output terminal; the input terminal of the RF gain control circuit is connected to the output terminal of the frequency conversion filter circuit, and is used to adjust the amplitude of the third frequency signal or the second frequency signal received through its input terminal before outputting it to its output terminal. The vector signal measurement circuit has a first input terminal connected to the output terminal of the radio frequency gain control circuit. When S-parameter measurement is required, the signal received at the first input terminal of the vector signal measurement circuit is output to the radio frequency signal input terminal of the vector signal measurement module in the vector signal measurement circuit, and the signal received at its first input terminal and the second output signal of the local oscillator circuit are selectively output to the local oscillator signal input terminal of the vector signal measurement module. The output terminal of the vector signal measurement module in the vector signal measurement circuit is the output terminal of the vector signal measurement circuit. The first input terminal of the multi-port switching circuit is connected to the output terminal of the vector signal measurement circuit, the first output terminal of the multi-port switching circuit is connected to the first port of the device under test, the second input terminal of the multi-port switching circuit is connected to the second port of the device under test, and the second output terminal of the multi-port switching circuit is connected to the input terminal of the receiver. The multi-port switching circuit includes a switching network formed by multiple switches to realize the connection or disconnection of any input terminal and any output terminal.

[0006] As described above, the transmitter provided in this aspect, through the cooperation of frequency conversion filtering circuit and RF gain control circuit, can achieve an output power range of -135dBm to +25dBm within the DC-13GHz frequency band, generating RF signals with ultra-wide bandwidth and wide dynamic range; through the cooperation of vector signal measurement circuit and multi-port switching circuit, it enables the selective measurement of complex parameters, such as the optional measurement of network parameters S11 and S22 in S-parameters, and, based on the cooperation of the receiver, the optional measurement of network parameters S12 and S21 in S-parameters; by setting filters and equalizers in appropriate positions, it achieves low spurious performance of less than -65dBc, greatly reducing signal spurious performance; through the multi-port switching circuit, it can support the simultaneous measurement of multiple devices under test, improving test throughput.

[0007] As one implementation of this aspect, when S-parameter measurement is not required, the signal received at the first input terminal of the vector signal measurement circuit is output to the output terminal of the vector signal measurement circuit.

[0008] In one implementation of this aspect, the frequency generation circuit includes: a signal generator; a first single-pole multi-throw (SPMD) switch, the moving end of which is connected to the output terminal of the signal generator; a first signal processing branch, including a first filter, a first amplifier, a first equalizer, and a first attenuator connected in sequence; the input terminal of the first filter is connected to the first fixed terminal of the first SPMD switch; the output terminal of the first attenuator is the first output terminal of the frequency generation circuit; the first signal processing branch is used to process signals within the first frequency range; a second signal processing branch, including a second filter, a second amplifier, a second equalizer, and a second attenuator connected in sequence; the input terminal of the second filter is connected to the second fixed terminal of the first SPMD switch; the output terminal of the second attenuator is the second output terminal of the frequency generation circuit; the second signal processing branch is used to process signals within the second frequency range.

[0009] As one implementation of this aspect, the frequency conversion filter circuit includes: a frequency conversion branch, comprising a first mixer, a third filter, a third amplifier, a second mixer, a fourth filter, a fourth amplifier, and a third equalizer connected in sequence; the input terminal of the first mixer is the first input terminal of the frequency conversion filter circuit; a fourth single-pole multi-throw switch, the first fixed terminal of the fourth single-pole multi-throw switch being connected to the output terminal of the third equalizer, and the second fixed terminal of the fourth single-pole multi-throw switch being connected to the second output terminal of the frequency generation circuit; a first amplification filter branch, comprising a fifth amplifier, a sixth filter, and a fourth equalizer connected in sequence; the input terminal of the fifth amplifier being connected to the moving terminal of the fourth single-pole multi-throw switch; and the output terminal of the fourth equalizer being the output terminal of the frequency conversion filter circuit.

[0010] As one implementation of this aspect, the frequency conversion branch further includes a filtering module disposed between the fourth filter and the fourth amplifier; the filtering module includes a second single-pole multi-throw switch, multiple filtering branches, and a third single-pole multi-throw switch, wherein each filtering branch includes at least one filter; the moving end of the second single-pole multi-throw switch is connected to the output end of the fourth filter, the input end of each filtering branch is connected to a fixed end of the second single-pole multi-throw switch, the output ends of the multiple filtering branches are connected to a fixed end of the third single-pole multi-throw switch, and the moving end of the third single-pole multi-throw switch is connected to the input end of the fourth amplifier.

[0011] As shown above, the frequency conversion filter circuit is configured with a frequency conversion branch and a direct path. When there is a need for frequency conversion of the signal, the signal can be processed by frequency conversion through the frequency conversion branch. When there is no need for frequency conversion of the signal, the signal can be directly amplified, filtered, and equalized through the direct path, thereby realizing the control of the frequency dynamic range.

[0012] As one implementation of this aspect, the RF gain control circuit includes: a fifth single-pole multi-throw (SPMD) switch, the moving end of which is connected to the output of the frequency conversion filter circuit; a second amplification and filtering branch, including a sixth amplifier, a seventh filter, and a fifth equalizer connected in sequence; the input of the sixth amplifier is connected to the first fixed end of the fifth SPMD switch; a first attenuation branch, including at least one third attenuator, the input of which is connected to the second fixed end of the fifth SPMD switch; and a sixth SPMD switch, the first fixed end of which is connected to the output of the fifth equalizer, the second fixed end of which is connected to the output of the third attenuator, and the third fixed end of which is connected to the third fixed end of the fifth SPMD switch.

[0013] As one implementation of this aspect, the RF gain control circuit further includes: a second attenuation branch, comprising at least one fourth attenuator, the input terminal of which is connected to the moving terminal of the sixth single-pole multi-throw switch; a seventh single-pole multi-throw switch, the moving terminal of which is connected to the output terminal of the fourth attenuator; a third amplification and filtering branch, comprising a seventh amplifier, an eighth filter, and a sixth equalizer connected in sequence; the input terminal of the seventh amplifier is connected to the first fixed terminal of the seventh single-pole multi-throw switch; the third attenuation branch includes at least one fifth attenuator, the input terminal of which is connected to the second fixed terminal of the seventh single-pole multi-throw switch; an eighth single-pole multi-throw switch, the first fixed terminal of which is connected to the output terminal of the sixth equalizer, the second fixed terminal of which is connected to the output terminal of the fifth attenuator, and the third fixed terminal of which is connected to the third fixed terminal of the seventh single-pole multi-throw switch; the moving terminal of the eighth single-pole multi-throw switch is the output terminal of the RF gain control circuit.

[0014] As shown above, the RF gain control circuit is equipped with an amplification and filtering branch, an attenuation branch, and a direct-through branch. The signal can be processed by switching to different branches through a switch, thereby obtaining the final required RF signal.

[0015] As one implementation of this aspect, the vector signal measurement circuit includes: a ninth single-pole multi-throw switch, the moving end of which is connected to the output terminal of the RF gain control circuit; a power divider, the input terminal of which is connected to the first fixed terminal of the ninth single-pole multi-throw switch; a first filtering branch, the first filtering branch including a tenth single-pole multi-throw switch and a ninth filter, the moving end of the tenth single-pole multi-throw switch being connected to the input terminal of the ninth filter, the first fixed terminal of the tenth single-pole multi-throw switch being connected to the first output terminal of the power divider, and the second fixed terminal of the tenth single-pole multi-throw switch being connected to the second output terminal of the local oscillator circuit; and a second filtering branch, the second filtering branch including an eleventh single-pole multi-throw switch and a tenth filter, the moving end of the eleventh single-pole multi-throw switch being connected to the input terminal of the tenth filter, and the first fixed terminal of the eleventh single-pole multi-throw switch being connected to the first output terminal of the power divider, and the second fixed terminal of the tenth single-pole multi-throw switch being connected to the second output terminal of the local oscillator circuit; and a second filtering branch, the second filtering branch including an eleventh single-pole multi-throw switch and a tenth filter, the moving end of which is connected to the input terminal of the eleventh single-pole multi-throw switch, and the second fixed terminal of the eleventh single-pole multi-throw switch being connected to the second output terminal of the local oscillator circuit; and a second filtering branch, the second filtering branch including an eleventh single-pole multi-throw switch and a tenth filter, the moving end of which is connected to the input terminal of the eleventh single-pole multi-throw switch, and the third fixed terminal of the eleventh single-pole multi-throw switch being connected to the first output terminal of the power divider circuit, and The first fixed terminal of the single-pole multi-throw switch is connected to the second output terminal of the power divider, and the second fixed terminal of the eleventh single-pole multi-throw switch is connected to the second fixed terminal of the ninth single-pole multi-throw switch; a third filtering branch, which includes an eleventh filter, the input terminal of which is connected to the third fixed terminal of the ninth single-pole multi-throw switch; a vector signal measurement module, the local oscillator signal input terminal of which is connected to the output terminal of the ninth filter, and the radio frequency signal input terminal of which is also connected to the output terminal of the tenth filter; a twelfth single-pole multi-throw switch, the first fixed terminal of which is connected to the output terminal of the vector signal measurement module, the second fixed terminal of which is connected to the output terminal of the eleventh filter, and the moving terminal of which is the output terminal of the vector signal measurement circuit.

[0016] As one implementation of this aspect, the multi-port switching circuit includes: a thirteenth single-pole multi-throw switch, the moving end of which is connected to the output terminal of the vector signal measurement circuit; a fourteenth single-pole multi-throw switch, the first fixed terminal of which is connected to the first fixed terminal of the thirteenth single-pole multi-throw switch; a fifteenth single-pole multi-throw switch, the moving end of which is connected to the moving end of the fourteenth single-pole multi-throw switch, and multiple fixed terminals of the fifteenth single-pole multi-throw switch are multiple first output terminals of the multi-port switching circuit; and a sixteenth single-pole multi-throw switch, the moving end of which is connected to the input terminal of the receiver. The first fixed terminal of the sixteenth single-pole multi-throw switch is connected to the second fixed terminal of the fourteenth single-pole multi-throw switch, and the second fixed terminal of the sixteenth single-pole multi-throw switch is connected to the second fixed terminal of the thirteenth single-pole multi-throw switch; the first fixed terminal of the seventeenth single-pole multi-throw switch is connected to the third fixed terminal of the sixteenth single-pole multi-throw switch, and the second fixed terminal of the seventeenth single-pole multi-throw switch is connected to the third fixed terminal of the thirteenth single-pole multi-throw switch; the moving terminal of the eighteenth single-pole multi-throw switch is connected to the moving terminal of the seventeenth single-pole multi-throw switch, and the multiple fixed terminals of the eighteenth single-pole multi-throw switch are the multiple second input terminals of the multi-port switching circuit.

[0017] As shown above, through the cooperation of various switching devices in the vector signal measurement circuit and the multi-port switching circuit, it is possible to measure multiple complex network parameters such as S11, S22, S12, and S21 in the S-parameters.

[0018] As one implementation of this aspect, there are multiple frequency conversion branches, each of which is connected to a fixed terminal of the fourth single-pole multi-throw switch, and each frequency conversion branch outputs a different frequency range.

[0019] As shown above, by setting up multiple frequency conversion branches, the frequency conversion range can be expanded, giving the transmitter a wider frequency range.

[0020] As one implementation of this aspect, there are multiple first attenuation branches, each of which is connected to a fixed terminal of the fifth single-pole multi-throw switch, and each first attenuation branch has a different attenuation range for the signal.

[0021] A second aspect of this application provides an automatic testing device, the automatic testing device comprising a transmitter as described in any of the first aspects above; a receiver; and a backplane, the backplane being signal-connected to the transmitter and the receiver.

[0022] The beneficial effects in this regard can also be found in the descriptions of the beneficial effects in each part of the first aspect above. Attached Figure Description

[0023] The various technical features of this application and their relationships will be further explained below with reference to the accompanying drawings. The drawings are exemplary; some technical features are not shown to scale, and some drawings may omit technical features commonly used in the art to which this application pertains that are not essential for understanding and implementing this application, or additionally show technical features that are not essential for understanding and implementing this application. In other words, the combination of various technical features shown in the drawings is not intended to limit this application. Furthermore, throughout this application, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:

[0024] Figure 1 This application provides a schematic diagram of the structure of a transmitter with S-parameter measurement function.

[0025] Figure 2 A schematic diagram of the specific circuit structure of a transmitter with S-parameter measurement function is provided for an embodiment of this application;

[0026] Figure 3 A schematic diagram of an automatic testing device provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of a vector network analyzer provided in an embodiment of this application. Detailed Implementation

[0028] The technical solutions provided in this application will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the system architecture and business scenarios provided in the embodiments of this application are mainly for illustrating possible implementations of the technical solutions of this application and should not be construed as the sole limitation on the technical solutions of this application. Those skilled in the art will recognize that the technical solutions provided in this application are equally applicable to similar technical problems as system architectures evolve and new business scenarios emerge.

[0029] It should be understood that this application provides a solution with S-parameter measurement functionality, including: a transmitter with S-parameter measurement functionality, and an automatic testing device including the transmitter. Since these technical solutions solve problems based on the same or similar principles, some repetitions may not be repeated in the following description of specific embodiments, but it should be considered that these specific embodiments have mutual references and can be combined with each other.

[0030] Unless otherwise defined, 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. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0031] In order to accurately describe the technical content of this application and to accurately understand the present invention, the following explanations or definitions of the terms used in this specification are given before describing the specific embodiments:

[0032] 1) Filters: Used for frequency selection and noise suppression, specifically to allow signals of a specific frequency to pass through while filtering out signals of other unwanted frequencies, in order to improve the signal-to-noise ratio of the signal.

[0033] 2) Amplifier: Used for signal amplification, specifically for increasing the voltage or power of the input signal to enhance signal strength.

[0034] 3) Equalizer: Used for frequency adjustment, specifically to adjust the amplification of electrical signals of different frequency components to balance the intensity of signals of different frequencies.

[0035] 4) Numerical control attenuator: Used for signal attenuation, specifically for: precisely adjusting the attenuation of the signal through electronic control to optimize signal output.

[0036] 5) Mixer: Used for frequency conversion, specifically for mixing two or more signals of different frequencies to generate a new frequency signal.

[0037] 6) Power divider: Used for power distribution, specifically for: evenly distributing the power of one input signal to multiple output ports.

[0038] 7) Complex network parameters: mainly including S-parameters, Y-parameters, Z-parameters, H-parameters and ABCD parameters.

[0039] 8) S-parameters: These are scattering parameters, network parameters based on the relationship between incident and reflected microwaves. S-parameters include reflection parameters S11 and S22, and transmission parameters S21 and S12. Specifically: S11: Input reflection coefficient (i.e., input return loss); S12: Reverse transmission coefficient (reflecting the isolation between port 1 and port 2); S21: Forward transmission coefficient (i.e., gain or loss); S22: Output reflection coefficient, i.e., output return loss. In some embodiments, the above-mentioned return loss, or gain or loss (which can reflect isolation), can be reflected in changes in signal amplitude, phase, etc.

[0040] 9) Vector Network Analyzer (VNA, also referred to as Vector Network Measurement Module in this application) Principle: (e.g.) Figure 4The schematic diagram of the VNA shown illustrates that it can accept an external local oscillator signal as its operating local oscillator signal through its local oscillator signal input terminal. It can also accept an RF signal through its RF signal input terminal. For the received RF signal, a switch can send the signal to either the first or second channel. After entering the first channel, the signal is split in two by a power divider. One part of the power is sent to the reference channel, and the other part is sent to the directional coupler and then to the first port (port1), before being sent to the DUT. At port1, some energy is reflected back from the DUT and enters the first channel's test channel through the directional coupler. By comparing the values ​​of the test channel and the reference channel (e.g., signal amplitude, phase, etc.), S11 can be obtained. The other part of the energy sent to the DUT will reach the second port (port2) through the DUT and enter the second channel's test channel. By comparing the values ​​of this test channel and the first channel's reference channel (e.g., signal amplitude, phase, etc.), S21 can be obtained. Similarly, S22 and S12 can be measured.

[0041] The transmitter solution with S-parameter measurement function provided in this application is mainly used in the field of radio frequency chip testing. The transmitter provided in the embodiments of this application can meet the testing requirements of ultra-wide bandwidth, low spurious emissions, and wide dynamic frequency range. It can also realize the testing of complex network parameters (such as S-parameters), increasing the diversity of functions of automatic test equipment.

[0042] The embodiments of this application provide a transmitter with S-parameter measurement function, which will be described below in conjunction with... Figure 1 and Figure 2 A detailed introduction to the transmitter is provided.

[0043] like Figure 1 and Figure 2 As shown, the transmitter includes a frequency generation circuit 10, a frequency conversion filter circuit 20, an RF gain control circuit 30, a vector signal measurement circuit 40, and a multi-port switching circuit 50 connected in sequence, as well as a local oscillator circuit 60 connected to the frequency conversion filter circuit 20 and the vector signal measurement circuit 40 respectively. The local oscillator circuit 60 includes at least: a first output terminal for outputting a first output signal (also called a first local oscillator signal), a second output terminal for outputting a second output signal (also called a second local oscillator signal), and a third output terminal for outputting a third output signal (also called a third local oscillator signal); the frequencies of the first local oscillator signal, the second local oscillator signal, and the third local oscillator signal are different and are selected according to specific needs.

[0044] Specifically: the frequency generation circuit 10 generates signals of a first frequency and a second frequency and outputs them to its first output terminal and second output terminal, wherein the first frequency is higher than the second frequency. The first input terminal and the second input terminal of the frequency generation circuit 10 are respectively connected to the first output terminal and the second output terminal of the frequency generation circuit 10. The frequency generation circuit 20 mixes and converts the first frequency signal received through its first input terminal with the first output signal of the local oscillation circuit 60 to generate a signal of a third frequency, and then selectively outputs either the third frequency signal or the second frequency signal received through its second input terminal to its output terminal. The input terminal of the RF gain control circuit 30 is connected to the output terminal of the frequency conversion filter circuit 20, and is used to adjust the amplitude of the third frequency signal or the second frequency signal received through its input terminal and output it to its output terminal; the first input terminal of the vector signal measurement circuit 40 is connected to the output terminal of the RF gain control circuit 30; when S-parameter measurement is required, the signal received by the first input terminal of the vector signal measurement circuit 40 is output to the RF signal input terminal of the vector signal measurement module VNA in the vector signal measurement circuit 40, and the signal received by its first input terminal and the second output signal of the local oscillator circuit 60 are selectively output to the local oscillator signal input terminal of the vector signal measurement module VNA. The output terminal of the vector signal measurement module VNA in the vector signal measurement circuit 40 is the output terminal of the vector signal measurement circuit 40; when S-parameter measurement is not required, the signal received by the first input terminal of the vector signal measurement circuit 40 is directly output to the output terminal of the vector signal measurement circuit 40 (i.e., it does not need to go through the vector signal measurement module VNA). The first input terminal of the multi-port switching circuit 50 is connected to the output terminal of the vector signal measurement circuit 40, the first output terminal of the multi-port switching circuit 50 is connected to the first port Port1 of the device under test (DUT), the second input terminal of the multi-port switching circuit 50 is connected to the second port Port2 of the DUT, and the second output terminal of the multi-port switching circuit 50 is connected to the input terminal of the receiver. The multi-port switching circuit 50 includes a switch network formed by multiple switches to enable connection or disconnection between any input terminal and any output terminal. The transmitter is constructed by the above-described structure.

[0045] The circuit structure of each part of the transmitter will be described in detail below.

[0046] The frequency generation circuit 10 includes a signal generator G, a first single-pole multi-throw switch K1, a first signal processing branch (including a first filter F1, a first amplifier P1, a first equalizer E1, and a first attenuator DSA1 connected in sequence), and a second signal processing branch (including a second filter F2, a second amplifier P2, a second equalizer E2, and a second attenuator DSA2 connected in sequence). The output of the signal generator G is connected to the moving end of the first single-pole multi-throw switch K1. The input of the first filter F1 in the first signal processing branch is connected to the first fixed end of the first single-pole multi-throw switch K1. The output of the first attenuator DSA1 in the first signal processing branch serves as the first output of the frequency generation circuit 10 and is connected to the first input of the frequency conversion filter circuit 20. The input of the second filter F2 in the second signal processing branch is connected to the second fixed end of the first single-pole multi-throw switch K1. The output of the second attenuator DSA2 in the second signal processing branch serves as the second output of the frequency generation circuit 10 and is connected to the second input of the frequency conversion filter circuit 20.

[0047] The signal generator G generates signals in different frequency bands. The first single-pole multi-throw switch K1 switches between the first and second signal processing branches to enable or disable either branch. The first signal processing branch processes signals within a first frequency range (including filtering, amplification, equalization, and attenuation of the input signal), while the second signal processing branch processes signals within a second frequency range (also including filtering, amplification, equalization, and attenuation of the input signal). The first and second frequency ranges represent different frequency ranges; for example, the first frequency range could be a fixed intermediate frequency range of approximately 4.5 GHz, and the second frequency range could be a low-frequency range of DC (0 Hz) to 2.5 GHz.

[0048] In this example, since the frequency generation circuit 10 includes two signal processing branches (i.e., the first signal processing branch and the second signal processing branch mentioned above), the first single-pole multi-throw switch K1 can be a single-pole double-throw switch (including two fixed terminals). It is understood that in other embodiments, if the frequency generation circuit 10 also includes other signal processing branches, the corresponding switch should be a switch including multiple fixed terminals.

[0049] The frequency conversion filter circuit 20 includes a frequency conversion branch (including a first mixer M1, a third filter F3, a third amplifier P3, a second mixer M2, a fourth filter F4, a fourth amplifier P4 and a third equalizer E3 connected in sequence), a fourth single-pole multi-throw switch K4, and a first amplification filter branch (including a fifth amplifier P5, a sixth filter F6 and a fourth equalizer E4 connected in sequence). In this circuit, the input terminal of the first mixer M1 serves as the first input terminal of the frequency conversion filter circuit 20 and is connected to the first output terminal of the frequency generation circuit 10 (i.e., the output terminal of the first attenuator DSA1 in the first signal processing branch). The input terminal of the second mixer M2 serves as the third input terminal of the frequency conversion filter circuit 20 and is connected to the third output terminal of the local oscillator circuit 60. The output terminal of the third equalizer E3 is connected to the first fixed terminal of the fourth single-pole multi-throw switch K4. The second output terminal of the frequency generation circuit 10 (i.e., the output terminal of the second attenuator DSA2 in the second signal processing branch) is connected to the second fixed terminal of the fourth single-pole multi-throw switch K4 (i.e., the second input terminal of the frequency conversion filter circuit 20). The input terminal of the fifth amplifier P5 is connected to the moving terminal of the fourth single-pole multi-throw switch K4. The output terminal of the fourth equalizer E4 is the output terminal of the frequency conversion filter circuit 20 and is connected to the input terminal of the RF gain control circuit 30. Specifically, the first mixer M1 is also connected to the local oscillator circuit 60, specifically, the first mixer M1 is connected to the first output terminal of the local oscillator circuit 60.

[0050] In this embodiment, the frequency conversion branch in the frequency conversion filter circuit 20 further includes a filter module disposed between the fourth filter F4 and the fourth amplifier P4. This filter module includes a second single-pole multi-throw switch K2, multiple filter branches, and a third single-pole multi-throw switch K3. In this embodiment, each filter branch includes one filter (…). Figure 2 The following description uses F5 to Fn as an example. The moving terminal of the second single-pole multi-throw switch K2 is connected to the output terminal of the fourth filter F4. The input terminals of filters F5 to Fn are each connected to a fixed terminal of the second single-pole multi-throw switch K2. The output terminals of filters F5 to Fn are each connected to a fixed terminal of the third single-pole multi-throw switch K3. The moving terminal of the third single-pole multi-throw switch K3 is connected to the input terminal of the fourth amplifier P4.

[0051] The frequency conversion branch is used to perform two frequency conversions on the signal transmitted from the first output terminal of the frequency generation circuit 10. First, the first mixer M1 mixes the signal in the first frequency range with the first local oscillator signal of the local oscillator circuit 60 for the first frequency conversion. After filtering and amplification by the third filter F3 and the third amplifier P3, the second mixer M2 mixes the signal with the third local oscillator signal of the local oscillator circuit 60 for the second frequency conversion, thereby obtaining the target frequency signal. Then, the fourth filter F4 and the filtering branch (one of F5 to Fn) in the filtering module are used to filter out spurious signals of different frequencies. After passing through the fourth amplifier P4, the third equalizer E3, the fourth single-pole multi-throw switch K4, the fifth amplifier P5, the sixth filter F6, and the fourth equalizer E4 to complete amplification, filtering, and in-band equalization, the signal is transmitted to the radio frequency gain control circuit 30. The frequency conversion branch is also used to directly transmit the signal in the second frequency range transmitted from the second output terminal of the frequency generation circuit 10 to the RF gain control circuit 30 after amplification, filtering and in-band equalization by the fourth single-pole multi-throw switch K4, the fifth amplifier P5, the sixth filter F6 and the fourth equalizer E4. In other words, the signal at the second output terminal of the frequency generation circuit 10 does not need to be converted and can be directly transmitted to the next stage after simple amplification, filtering and in-band equalization.

[0052] In one example of this embodiment, the number of frequency conversion branches in the frequency conversion filter circuit 20 can be the same as the number of signal processing branches in the frequency generation circuit 10. That is, the frequency conversion filter circuit 20 has the same number of input terminals as the frequency generation circuit 10. In another example of this embodiment, the number of frequency conversion branches in the frequency conversion filter circuit 20 can be different from the number of signal processing branches in the frequency generation circuit 10. For example, the frequency generation circuit 10 may have two output terminals, while the frequency conversion filter circuit 20 may have multiple input terminals. One input terminal may be directly connected to the fourth single-pole multi-throw switch K4 (i.e., a direct path), and the other input terminals may be connected to different frequency conversion branches to output signals of different frequencies.

[0053] The RF gain control circuit 30 includes a fifth single-pole multi-throw switch K5, a second amplification and filtering branch (including a sixth amplifier P6, a seventh filter F7, and a fifth equalizer E5 connected in sequence), a first attenuation branch (including at least one third attenuator; in this embodiment, a third attenuator DSA3 is used as an example), a sixth single-pole multi-throw switch K6, a second attenuation branch (including at least one fourth attenuator; in this embodiment, a fourth attenuator DSA4 is used as an example), a seventh single-pole multi-throw switch K7, a third amplification and filtering branch (including a seventh amplifier P7, an eighth filter F8, and a sixth equalizer E6 connected in sequence), a third attenuation branch (including at least one fifth attenuator; in this embodiment, a fifth attenuator DSA5 is used as an example), and an eighth single-pole multi-throw switch K8. In this circuit, the moving terminal of the fifth single-pole multi-throw switch K5 is connected to the output terminal of the frequency converter filter circuit 20 (the output terminal of the fourth equalizer E4); the input terminal of the sixth amplifier P6 is connected to the first fixed terminal of the fifth single-pole multi-throw switch K5; the input terminal of the third attenuator DSA3 is connected to the second fixed terminal of the fifth single-pole multi-throw switch K5; the first fixed terminal of the sixth single-pole multi-throw switch K6 is connected to the output terminal of the fifth equalizer E5; the second fixed terminal of the sixth single-pole multi-throw switch K6 is connected to the output terminal of the third attenuator DSA3; the third fixed terminal of the sixth single-pole multi-throw switch K6 is connected to the third fixed terminal of the fifth single-pole multi-throw switch K5; and the input terminal of the fourth attenuator DSA4 is connected to the moving terminal of the sixth single-pole multi-throw switch K6. The moving terminal of the seventh single-pole multi-throw switch K7 is connected to the output terminal of the fourth attenuator DSA4. The input terminal of the seventh amplifier P7 is connected to the first fixed terminal of the seventh single-pole multi-throw switch K7. The input terminal of the fifth attenuator DSA5 is connected to the second fixed terminal of the seventh single-pole multi-throw switch K7. The first fixed terminal of the eighth single-pole multi-throw switch K8 is connected to the output terminal of the sixth equalizer E6. The second fixed terminal of the eighth single-pole multi-throw switch K8 is connected to the output terminal of the fifth attenuator DSA5. The third fixed terminal of the eighth single-pole multi-throw switch K8 is connected to the third fixed terminal of the seventh single-pole multi-throw switch K7. The moving terminal of the eighth single-pole multi-throw switch K8 serves as the output terminal of the RF gain control circuit 30 and is connected to the input terminal of the vector signal measurement circuit 40.

[0054] The radio frequency gain control circuit 30 is used to process the target radio frequency signal transmitted from the frequency conversion filter circuit 20 by different connections and switching of the fifth single-pole multi-throw switch K5, the sixth single-pole multi-throw switch K6, the seventh single-pole multi-throw switch K7 and the eighth single-pole multi-throw switch K8, thereby providing appropriate attenuation or amplification to achieve dynamic range control.

[0055] In this example, the number of amplification filter branches and attenuation branches can be adjusted according to requirements.

[0056] The vector signal measurement circuit 40 includes a ninth single-pole multi-throw switch K9, a power divider PD1, a first filter branch (including a tenth single-pole multi-throw switch K10 and a ninth filter F9), a second filter branch (including an eleventh single-pole multi-throw switch K11 and a tenth filter F10), a third filter branch (including an eleventh filter F11), a vector signal measurement module VNA, and a twelfth single-pole multi-throw switch K12. Specifically, the moving terminal of the ninth single-pole multi-throw switch K9 is connected to the output terminal of the RF gain control circuit 30 (the moving terminal of the eighth single-pole multi-throw switch K8); the input terminal of the power divider PD1 is connected to the first fixed terminal of the ninth single-pole multi-throw switch K9; the first fixed terminal of the tenth single-pole multi-throw switch K10 is connected to the first output terminal of the power divider PD1; the second fixed terminal of the tenth single-pole multi-throw switch K10 serves as the second input terminal of the vector signal measurement circuit 40 and is connected to the second output terminal of the local oscillation circuit 60; the moving terminal of the eleventh single-pole multi-throw switch K11 is connected to the input terminal of the tenth filter F10; the first fixed terminal of the eleventh single-pole multi-throw switch K11 is connected to the second output terminal of the power divider PD1; and the eleventh single-pole multi-throw switch K11... The second fixed terminal is connected to the second fixed terminal of the ninth single-pole multi-throw switch K9. The input terminal of the eleventh filter F11 is connected to the third fixed terminal of the ninth single-pole multi-throw switch K9. The local oscillator signal input terminal of the vector signal measurement module VNA is connected to the output terminal of the ninth filter F9. The radio frequency signal input terminal of the vector signal measurement module VNA is connected to the output terminal of the tenth filter F10. The first fixed terminal of the twelfth single-pole multi-throw switch K12 is connected to the output terminal of the vector signal measurement module VNA. The second fixed terminal of the twelfth single-pole multi-throw switch K12 is connected to the output terminal of the eleventh filter F11. The moving terminal of the twelfth single-pole multi-throw switch K12 serves as the output terminal of the vector signal measurement circuit 40 and is connected to the first input terminal of the multi-port switching circuit.

[0057] The multi-port switching circuit 50 is in the form of a switch matrix, specifically including the thirteenth single-pole multi-throw switch K13, the fourteenth single-pole multi-throw switch K14, the fifteenth single-pole multi-throw switch K15, the sixteenth single-pole multi-throw switch K16, the seventeenth single-pole multi-throw switch K17, and the eighteenth single-pole multi-throw switch K18. Among them, the moving end of the thirteenth single-pole multi-throw switch K13 serves as the first input terminal of the multi-port switching circuit 50 and is connected to the output terminal of the vector signal measurement circuit 40; the first fixed end of the fourteenth single-pole multi-throw switch K14 is connected to the first fixed end of the thirteenth single-pole multi-throw switch K13; the moving end of the fifteenth single-pole multi-throw switch K15 is connected to the moving end of the fourteenth single-pole multi-throw switch K14, and multiple fixed ends of the fifteenth single-pole multi-throw switch K15 serve as multiple first output terminals of the multi-port switching circuit 50 and are connected to the first port Port1 of the device under test; the moving end of the sixteenth single-pole multi-throw switch K16 serves as the second output terminal of the multi-port switching circuit 50 and is connected to the input terminal of the receiver; the sixteenth single-pole multi-throw switch... The first fixed terminal of K16 is connected to the second fixed terminal of the fourteenth single-pole multi-throw switch K14. The second fixed terminal of the sixteenth single-pole multi-throw switch K16 is connected to the second fixed terminal of the thirteenth single-pole multi-throw switch K13. The first fixed terminal of the seventeenth single-pole multi-throw switch K17 is connected to the third fixed terminal of the sixteenth single-pole multi-throw switch K16. The second fixed terminal of the seventeenth single-pole multi-throw switch K17 is connected to the third fixed terminal of the thirteenth single-pole multi-throw switch K13. The moving terminal of the eighteenth single-pole multi-throw switch K18 is connected to the moving terminal of the seventeenth single-pole multi-throw switch K17. Multiple fixed terminals of the eighteenth single-pole multi-throw switch K18 serve as multiple second input terminals of the multi-port switching circuit 50, connecting to the second port Port2 of the device under test.

[0058] The local oscillator circuit 60 is used to provide a local oscillator signal for the mixer in the frequency conversion filter circuit 20, and also to provide a local oscillator signal for the vector signal measurement module VNA in the vector signal measurement circuit 40.

[0059] It should be understood that the single-pole multi-throw switch mentioned in the above embodiments can be selected based on the number of branches connected to the fixed terminal. For example, when the fixed terminal only needs to connect to two branches, a single-pole double-throw switch can be selected. When the fixed terminal needs to connect to three branches, a single-pole multi-throw switch with three fixed terminals can be selected. Similarly, when the fixed terminal needs to connect to n branches, a single-pole multi-throw switch with n fixed terminals can be selected.

[0060] The following example illustrates the working principle of the transmitter by using the signal generator G of the frequency generation circuit 10 to generate a fixed signal of 4.5 GHz.

[0061] In this embodiment, the signal generator G generates a fixed 4.5 GHz signal. This signal sequentially passes through the first filter F1, the first amplifier P1, the first equalizer E1, and the first attenuator DSA1 in the first signal processing branch to complete filtering, level control, in-band equalization, and attenuation. Then, it enters the frequency conversion branch of the frequency conversion filter circuit 20. First, the first mixer M1 up-converts the 4.5 GHz fixed signal with a fixed-high first local oscillator signal (provided by the local oscillator circuit 60) to obtain an 18 GHz signal. Then, it passes through the third filter F3 and the third amplifier P3 for filtering and amplification. Finally, the second mixer M2 mixes the 18 GHz signal with... The variable-high third local oscillator signal (provided by the local oscillator circuit 60) is down-converted to obtain a first radio frequency (RF) signal of 2.5–13 GHz. Then, after filtering out unwanted frequency band signals by the fourth filter F4, it is switched to different filtering modules (e.g., one of the fifth filter F5 to the nth filter Fn) by the second single-pole multi-throw (SPMW) switch K2 to better filter out spurious signals after mixing. Then, the first RF signal is amplified, filtered, and in-band equalized sequentially by the fourth amplifier P4, the third equalizer E3, the fourth SPMW switch K4, the fifth amplifier P5, the sixth filter F6, and the fourth equalizer E4 before being transmitted to the RF gain control circuit 30. The RF gain control circuit 30 controls the switching of the amplification and filtering branch, the attenuation branch, and the direct-through branch by controlling the fifth SPMW switch K5, the sixth SPMW switch K6, the seventh SPMW switch K7, and the eighth SPMW switch K8, thereby controlling the first RF signal. Thus, the RF gain control circuit 30 can output a second RF signal through the moving end of the eighth SPMW switch K8.

[0062] If S-parameter measurement is not required, the second RF signal output from the RF gain control circuit 30 passes sequentially through the ninth single-pole multi-throw switch K9, the eleventh filter F11, and the twelfth single-pole multi-throw switch K12, and is used as a conventional transmitter. The eleventh filter F11 further suppresses spurious signals in the RF signal. In other words, when S-parameter measurement is not required, the RF signal only needs to be filtered by one filter when passing through the vector signal measurement circuit 40, and does not need to enter the vector signal measurement module VNA. In this case, the transmitter can be used as a conventional transmitter.

[0063] If S-parameter measurement is required, as one implementation method, the vector signal measurement module (VNA) requires an external local oscillator signal. In this case, the second RF signal output from the RF gain control circuit 30 sequentially passes through the ninth single-pole multi-throw switch K9 and the eleventh single-pole multi-throw switch K11, and after spurious signal interference is suppressed by the tenth filter F10, it passes through the vector signal measurement module (VNA) and the twelfth single-pole multi-throw switch K12 to form a connection between the VNA and the multi-port switching circuit 50, and the second RF signal is input to the thirteenth single-pole multi-throw switch K13 of the multi-port switching circuit 50. In addition, the second local oscillator signal provided by the local oscillator circuit 60 passes through the tenth single-pole multi-throw switch K10, and after spurious interference is filtered out by the ninth filter F9, it is input into the vector signal measurement module (VNA) as its external local oscillator signal.

[0064] If S-parameter measurement is required, as an alternative implementation, the vector signal measurement module (VNA) can function without an external local oscillator signal. In this case, the second RF signal output from the RF gain control circuit 30 passes sequentially through the ninth single-pole multi-throw switch K9 and the power divider PD1. The power divider PD1 splits the signal into two paths: one path passes through the tenth single-pole multi-throw switch K10, where spurious signals are filtered out by the ninth filter F9, and this becomes the local oscillator signal for the vector signal measurement module (VNA); the other path passes through the eleventh single-pole multi-throw switch K11, where spurious signals are suppressed by the tenth filter F10, and this becomes the RF input signal for the vector signal measurement module (VNA). The connection between the vector signal measurement module (VNA) and the multi-port switching circuit 50 is then established through the switching of the twelfth single-pole multi-throw switch K12.

[0065] When measuring S11 in the S-parameters, the thirteenth single-pole multi-throw switch K13, the fourteenth single-pole multi-throw switch K14, and the fifteenth single-pole multi-throw switch K15 are connected. The fixed terminal of the fifteenth single-pole multi-throw switch K15 is connected to Port1 of the device under test, thereby realizing the connection path between the vector signal measurement module VNA and Port1 of the device under test (i.e., VNA-K12-K13-K14-K15-Port1 conduction). At this time, S11 can be measured.

[0066] When measuring S22 in the S-parameters, the thirteenth single-pole multi-throw (SPMD) switch K13, the seventeenth SPMD switch K17, and the eighteenth SPMD switch K18 are connected. The fixed terminal of the eighteenth SPMD switch K18 is connected to Port2 of the device under test (DUT). This establishes a connection path between the vector signal measurement module VNA and Port2 of the DUT (i.e., VNA-K12-K13-K17-K18-Port2 conduction), allowing for the measurement of S22.

[0067] When measuring S21 in the S-parameters, the thirteenth single-pole multi-throw (SPD) switch K13, the fourteenth single-pole multi-throw (SPD) switch K14, and the fifteenth single-pole multi-throw (SPD) switch K15 are connected. The fixed terminal of the fifteenth single-pole multi-throw (SPD) switch K15 is connected to Port1 of the device under test (DUT), and Port2 of the DUT is connected to the fixed terminal of the eighteenth single-pole multi-throw (SPD) switch K18. The eighteenth single-pole multi-throw (SPD) switch K18, the seventeenth single-pole multi-throw (SPD) switch K17, and the sixteenth single-pole multi-throw (SPD) switch K16 are connected. The moving terminal of the sixteenth single-pole multi-throw (SPD) switch K16 is connected to the input terminal of the receiver, thus forming the measurement loop: VNA-K12-K13-K14-K15-DUT Port1-DUT Port2-K18-K17-K16-Receiver. The measurement loop can be used to measure S21. To further clarify, when measuring S21, the signal on one side of the DUT (e.g., the side connected to K15) is connected to the output of the vector signal measurement module (VNA), so the value of the signal on that side can be obtained by the VNA. The signal on the other side of the DUT (e.g., the side connected to K18) is connected to the input of the receiver, so the value of that signal can be obtained by the receiver. In this embodiment, the receiver and transmitter are located within the same automated test equipment. Therefore, the processing unit of the automated test equipment can obtain the signal values ​​provided by the VNA and the receiver, and then calculate S21 based on the algorithm for calculating S21. In other embodiments, after obtaining the signal value provided by the receiver, the processing unit of the automated test equipment sends it to the VNA, which then calculates S21 based on the signal values ​​on both sides of the DUT and the algorithm for calculating S21. In some embodiments, the automated test equipment may include a backplane with the processing unit on it, and the backplane is connected to the receiver and transmitter via signal lines or gold finger connectors.

[0068] When measuring S12 in the S-parameters, the thirteenth single-pole multi-throw (SPD) switch K13, the seventeenth single-pole multi-throw (SPD) switch K17, and the eighteenth single-pole multi-throw (SPD) switch K18 are connected. The fixed terminal of the eighteenth SPD switch K18 is connected to Port2 of the device under test (DUT). The Port1 of the DUT is connected to the fixed terminal of the fifteenth SPD switch K15. The fifteenth SPD switch K15, the fourteenth SPD switch K14, and the sixteenth SPD switch K16 are connected. The moving terminal of the sixteenth SPD switch K16 is connected to the input terminal of the receiver, thus forming the measurement loop: VNA-K12-K13-K17-K18-DUT Port2-DUT Port1-K15-K14-K16-Receiver. This measurement loop allows for the measurement of S12. For details on the measurement of S12, please refer to the description of the measurement of S21 above, which will not be repeated here.

[0069] The following example illustrates the working principle of the transmitter by using the signal generator G of the frequency generation circuit 10 to generate a DC (0Hz) - 2.5GHz low-frequency signal.

[0070] The implementation method of this embodiment can be referred to the above implementation method of signal generator G generating a 4.5GHz fixed signal. The specific implementation process is basically the same, except that: the signal generator G generates a DC-2.5GHz low-frequency signal, which passes through the second filter F2, the second amplifier P2, the second equalizer E2 and the second attenuator DSA2 in the second signal processing branch to complete filtering, level control, in-band equalization and attenuation. Then, it enters the direct path of the frequency conversion filter circuit 20 and directly enters the fourth single-pole multi-throw switch K4, the fifth amplifier P5, the sixth filter F6 and the fourth equalizer E4 to complete the amplification, filtering and in-band equalization of the radio frequency signal, and then is transmitted to the radio frequency gain control circuit 30. That is to say, in this embodiment, the signal generated by the signal generator G does not need to go through the frequency conversion processing of the frequency conversion branch. Apart from this, the other implementation processes can be referred to the above embodiment, and will not be repeated here.

[0071] Based on the transmitter provided in this application embodiment, a radio frequency signal with ultra-large bandwidth and wide dynamic range can be generated through the cooperation of frequency conversion filter circuit and radio frequency gain control circuit; by setting filters and equalizers in appropriate positions, signal spurious signals are greatly reduced; through the cooperation of vector signal measurement circuit, multi-port switching circuit and receiver side, the measurement of multiple complex network parameters such as S11, S22, S12 and S21 in S-parameters can be realized.

[0072] This application also provides an automated testing device, such as... Figure 3 As shown, the system includes the aforementioned transmitter, receiver, and backplane. The backplane is signal-connected to the transmitter and receiver, and can be connected via signal lines or gold finger connectors. The backplane also has a processing unit, as detailed in the foregoing embodiments, which will not be repeated here.

[0073] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, all of which fall within the scope of protection of this application.

Claims

1. A transmitter with S-parameter measurement function, characterized in that, include: Frequency generation circuit, frequency conversion filter circuit, radio frequency gain control circuit, vector signal measurement circuit, local oscillation circuit and multi-port switching circuit; The frequency generation circuit is used to generate signals of a first frequency and a second frequency and output them to its first output terminal and second output terminal; wherein the first frequency is higher than the second frequency. The first input terminal and the second input terminal of the frequency conversion filter circuit are respectively connected to the first output terminal and the second output terminal of the frequency generation circuit. The circuit is used to mix and convert the first frequency signal received through its first input terminal with the first output signal of the local oscillation circuit to a third frequency signal, and then selectively output the third frequency signal and the second frequency signal received through the second input terminal to its output terminal. The input terminal of the radio frequency gain control circuit is connected to the output terminal of the frequency conversion filter circuit, and is used to adjust the amplitude of the signal of the third frequency or the signal of the second frequency received through its input terminal and output it to its output terminal. The first input terminal of the vector signal measurement circuit is connected to the output terminal of the radio frequency gain control circuit. When S-parameter measurement is required, the signal received at the first input terminal of the vector signal measurement circuit is output to the radio frequency signal input terminal of the vector signal measurement module in the vector signal measurement circuit, and the signal received at its first input terminal and the second output signal of the local oscillator circuit are selectively output to the local oscillator signal input terminal of the vector signal measurement module. The output terminal of the vector signal measurement module in the vector signal measurement circuit is the output terminal of the vector signal measurement circuit. The first input terminal of the multi-port switching circuit is connected to the output terminal of the vector signal measurement circuit, the first output terminal of the multi-port switching circuit is connected to the first port of the device under test, the second input terminal of the multi-port switching circuit is connected to the second port of the device under test, and the second output terminal of the multi-port switching circuit is connected to the input terminal of the receiver. The multi-port switching circuit includes a switch network formed by multiple switches to realize the connection or disconnection between any input terminal and any output terminal.

2. The transmitter according to claim 1, characterized in that, When S-parameter measurement is not required, the signal received at the first input terminal of the vector signal measurement circuit is output to the output terminal of the vector signal measurement circuit.

3. The transmitter according to claim 1, characterized in that, The frequency generation circuit includes: Signal generator; A first single-pole multi-throw switch, wherein the moving end of the first single-pole multi-throw switch is connected to the output end of the signal generator; The first signal processing branch includes a first filter, a first amplifier, a first equalizer, and a first attenuator connected in sequence; the input terminal of the first filter is connected to the first fixed terminal of the first single-pole multi-throw switch; the output terminal of the first attenuator is the first output terminal of the frequency generation circuit; the first signal processing branch is used to process signals within the first frequency range. The second signal processing branch includes a second filter, a second amplifier, a second equalizer, and a second attenuator connected in sequence; the input terminal of the second filter is connected to the second fixed terminal of the first single-pole multi-throw switch; the output terminal of the second attenuator is the second output terminal of the frequency generation circuit; the second signal processing branch is used to process signals within the second frequency range.

4. The transmitter according to claim 1, characterized in that, The frequency conversion filter circuit includes: The frequency conversion branch includes a first mixer, a third filter, a third amplifier, a second mixer, a fourth filter, a fourth amplifier, and a third equalizer connected in sequence; the input terminal of the first mixer is the first input terminal of the frequency conversion filter circuit. A fourth single-pole multi-throw switch, wherein the first fixed terminal of the fourth single-pole multi-throw switch is connected to the output terminal of the third equalizer, and the second fixed terminal of the fourth single-pole multi-throw switch is connected to the second output terminal of the frequency generation circuit; The first amplification and filtering branch includes a fifth amplifier, a sixth filter, and a fourth equalizer connected in sequence; the input terminal of the fifth amplifier is connected to the moving terminal of the fourth single-pole multi-throw switch; the output terminal of the fourth equalizer is the output terminal of the frequency conversion filtering circuit.

5. The transmitter according to claim 4, characterized in that, The frequency conversion branch also includes a filtering module disposed between the fourth filter and the fourth amplifier; The filtering module includes a second single-pole multi-throw switch, multiple filtering branches, and a third single-pole multi-throw switch, wherein each filtering branch includes at least one filter; The moving end of the second single-pole multi-throw switch is connected to the output end of the fourth filter. The input end of each filter branch is connected to a fixed end of the second single-pole multi-throw switch. The output ends of the multiple filter branches are connected to a fixed end of the third single-pole multi-throw switch. The moving end of the third single-pole multi-throw switch is connected to the input end of the fourth amplifier.

6. The transmitter according to claim 1, characterized in that, The radio frequency gain control circuit includes: The fifth single-pole multi-throw switch, wherein the moving end of the fifth single-pole multi-throw switch is connected to the output end of the frequency conversion filter circuit; The second amplification and filtering branch includes a sixth amplifier, a seventh filter, and a fifth equalizer connected in sequence; the input terminal of the sixth amplifier is connected to the first fixed terminal of the fifth single-pole multi-throw switch. The first attenuation branch includes at least one third attenuator, the input terminal of which is connected to the second fixed terminal of the fifth single-pole multi-throw switch; A sixth single-pole multi-throw switch, wherein the first fixed terminal of the sixth single-pole multi-throw switch is connected to the output terminal of the fifth equalizer, the second fixed terminal of the sixth single-pole multi-throw switch is connected to the output terminal of the third attenuator, and the third fixed terminal of the sixth single-pole multi-throw switch is connected to the third fixed terminal of the fifth single-pole multi-throw switch.

7. The transmitter according to claim 6, characterized in that, The radio frequency gain control circuit also includes: The second attenuation branch includes at least one fourth attenuator, the input of which is connected to the moving end of the sixth single-pole multi-throw switch. A seventh single-pole multi-throw switch, wherein the moving end of the seventh single-pole multi-throw switch is connected to the output end of the fourth attenuator; The third amplification and filtering branch includes a seventh amplifier, an eighth filter, and a sixth equalizer connected in sequence; the input terminal of the seventh amplifier is connected to the first fixed terminal of the seventh single-pole multi-throw switch. The third attenuation branch includes at least one fifth attenuator, the input of which is connected to the second fixed terminal of the seventh single-pole multi-throw switch. The eighth single-pole multi-throw switch has its first fixed terminal connected to the output terminal of the sixth equalizer, its second fixed terminal connected to the output terminal of the fifth attenuator, and its third fixed terminal connected to the third fixed terminal of the seventh single-pole multi-throw switch; the moving terminal of the eighth single-pole multi-throw switch is the output terminal of the radio frequency gain control circuit.

8. The transmitter according to claim 1, characterized in that, The vector signal measurement circuit includes: A ninth single-pole multi-throw switch, wherein the moving end of the ninth single-pole multi-throw switch is connected to the output end of the radio frequency gain control circuit; A power divider, wherein the input terminal of the power divider is connected to the first fixed terminal of the ninth single-pole multi-throw switch; The first filtering branch includes a tenth single-pole multi-throw switch and a ninth filter. The moving end of the tenth single-pole multi-throw switch is connected to the input end of the ninth filter. The first fixed end of the tenth single-pole multi-throw switch is connected to the first output end of the power divider. The second fixed end of the tenth single-pole multi-throw switch is connected to the second output end of the local oscillation circuit. The second filtering branch includes an eleventh single-pole multi-throw switch and a tenth filter. The moving end of the eleventh single-pole multi-throw switch is connected to the input end of the tenth filter. The first fixed end of the eleventh single-pole multi-throw switch is connected to the second output end of the power divider. The second fixed end of the eleventh single-pole multi-throw switch is connected to the second fixed end of the ninth single-pole multi-throw switch. The third filtering branch includes an eleventh filter, the input of which is connected to the third fixed terminal of the ninth single-pole multi-throw switch. The vector signal measurement module has its local oscillator signal input terminal connected to the output terminal of the ninth filter, and its radio frequency signal input terminal also connected to the output terminal of the tenth filter. The twelfth single-pole multi-throw switch has its first fixed terminal connected to the output terminal of the vector signal measurement module, its second fixed terminal connected to the output terminal of the eleventh filter, and its moving terminal being the output terminal of the vector signal measurement circuit.

9. The transmitter according to claim 1, characterized in that, The multi-port switching circuit includes: The thirteenth single-pole multi-throw switch, wherein the moving end of the thirteenth single-pole multi-throw switch is connected to the output end of the vector signal measurement circuit; The fourteenth single-pole multi-throw switch, wherein the first fixed terminal of the fourteenth single-pole multi-throw switch is connected to the first fixed terminal of the thirteenth single-pole multi-throw switch; The fifteenth single-pole multi-throw switch, the moving end of the fifteenth single-pole multi-throw switch is connected to the moving end of the fourteenth single-pole multi-throw switch, and the multiple fixed ends of the fifteenth single-pole multi-throw switch are multiple first output ends of the multi-port switching circuit; The sixteenth single-pole multi-throw switch has its moving terminal connected to the input terminal of the receiver, its first fixed terminal connected to the second fixed terminal of the fourteenth single-pole multi-throw switch, and its second fixed terminal connected to the second fixed terminal of the thirteenth single-pole multi-throw switch. The seventeenth single-pole multi-throw switch has its first fixed terminal connected to the third fixed terminal of the sixteenth single-pole multi-throw switch, and its second fixed terminal connected to the third fixed terminal of the thirteenth single-pole multi-throw switch. The eighteenth single-pole multi-throw switch has its moving terminal connected to the moving terminal of the seventeenth single-pole multi-throw switch, and its multiple fixed terminals are multiple second input terminals of the multi-port switching circuit.

10. An automatic testing device, characterized in that, The automatic testing equipment includes: the transmitter according to any one of claims 1-9; Receiver; A backplane, which is signal-connected to the transmitter and receiver.

Images