Modularized radio frequency transmit-receive test device and radio frequency transmit-receive test method

Abstract

The invention provides modular radio frequency transceiving test equipment and a radio frequency transceiving test method, and relates to the technical field of signal test. The modularized radio frequency transceiving test equipment comprises a split type transmitting module and a split type radio frequency receiving module, the split type radio frequency receiving module is configured to be in an automatic frequency test mode, and performs amplitude conditioning and frequency division operation on a radio frequency signal under the condition that the radio frequency signal is received so as to obtain a local oscillation preset frequency of the radio frequency signal; obtaining a frequency value of an intermediate frequency signal according to the local oscillation preset frequency, and calculating a frequency value of the radio frequency signal by combining the frequency value and the local oscillation preset frequency; the split type transmitting module is configured to output high output power and low harmonic waves of 100 kHz to 1 GHz under the condition of transmitting a radio frequency signal. The device can improve the anti-interference performance and applicability of the transmit-receive test.

Description

Technical Field

[0001] The present application relates to the field of signal testing technology, and in particular to a modular radio frequency transceiver testing device and a radio frequency transceiver testing method. Background Art

[0002] The RF transceiver module is the core component in the wireless communication system, and its design and performance directly affect the stability and reliability of the communication system.

[0003] Traditional RF transceiver modules usually use fixed-frequency local oscillator signals for signal processing, which limits their frequency range. For example, some modules may only support signal processing in a specific frequency band and cannot cover a wider frequency range, or complex circuit designs are required to achieve high-frequency signal processing, including high-frequency filters, amplifiers, and mixers. The design of these circuits is easily affected by high-frequency noise, which limits the expansion of the frequency range. Therefore, the prior art has the problem of low applicability of RF transceiver testing and inability to cover a wide range of frequency tests. Summary of the invention

[0004] The present application provides a modular RF transceiver test device and a RF transceiver test method, which can realize automatic frequency testing from 400KHz to 3GHz, covering a wide range from low frequency to high frequency, and can improve the applicability of RF transceiver testing, as well as improve the accuracy of testing the actual RF frequency.

[0005] In a first aspect, an embodiment of the present application provides a split-type transmitting module and a split-type RF receiving module.

[0006] The split RF receiving module is configured to, when receiving a RF signal, perform a first amplitude conditioning on the RF signal, perform a power division operation on the amplitude-conditioned RF signal to obtain a first frequency signal and a second frequency signal, perform a second amplitude conditioning on the first frequency signal and perform a frequency division operation and a second amplitude conditioning on the second frequency signal to obtain a local oscillator preset frequency of the RF signal, obtain a frequency value of an intermediate frequency signal according to the local oscillator preset frequency, and combine the frequency value and the local oscillator preset frequency to calculate the frequency value of the RF signal.

[0007] The split-type transmitting module is configured to output high output power and low harmonics of 100kHz to 1GHz when transmitting radio frequency signals.

[0008] The modular RF transceiver test equipment provided in the embodiment of the present application can reduce interference by designing the receiving module and the RF transmitting module in a split type to form a plug-in structure. The modular RF transceiver test equipment has RF receiving, transmitting and amplitude conditioning functions, and can realize automatic frequency testing from 400KHz to 3GHz, covering a wide range from low frequency to high frequency, and can improve the applicability of RF transceiver testing. In addition, in this solution, the frequency value of the RF signal is calculated by judging the frequency value of the intermediate frequency signal and the preset frequency of the local oscillator, which can improve the accuracy of testing the actual RF frequency.

[0009] In some embodiments, the split RF receiving module includes an automatic frequency testing unit; the automatic frequency testing circuit is used to perform a second amplitude conditioning on the first frequency signal and a second amplitude conditioning on the second frequency signal; and perform a frequency division operation on the second frequency signal.

[0010] In some embodiments, the split transmitting module and the split RF receiving module are detachably connected to form a plug-in structure.

[0011] In some embodiments, the split-type transmitting module further includes a reference clock and local oscillator unit, and the reference clock and local oscillator unit is configured to generate multiple reference clock signals and local oscillator signals.

[0012] In some embodiments, the split-type transmitting module includes a transmitting unit, and the transmitting unit is configured to mix an input intermediate frequency signal with two local oscillation signals to obtain a first intermediate frequency signal.

[0013] The first intermediate frequency signal is mixed with a local oscillator signal to obtain an initial radio frequency signal, and the initial radio frequency signal is respectively passed through a first filter, an amplifier, and a second filter in the transmitting unit as the radio frequency signal output of the transmitting unit; wherein the two local oscillator signals and the local oscillator signal are generated by a reference clock and a local oscillator unit.

[0014] In some embodiments, the split-type transmitting module further includes a power supply and a control unit, which is configured to supply power to each unit in the split-type transmitting module and analyze external control signals.

[0015] In some embodiments, the frequency range of the radio frequency signal transmitted by the split transmission module is 100 KHz to 1 GHz.

[0016] In some embodiments, the split transmitting module is provided with a radio frequency output signal port, an intermediate frequency input signal port, a reference input signal port, and a reference output signal port; the receiving module is provided with a radio frequency input signal port and an intermediate frequency output signal port.

[0017] In some embodiments, the split transmitting module is connected to a carrier board, and the split transmitting module receives the test instruction through a PXIE interface on the carrier board.

[0018] In a second aspect, an embodiment of the present application provides a radio frequency transceiver test method, which can be applied to a modular radio frequency transceiver test device, wherein the modular radio frequency transceiver test device includes a split radio frequency receiving module and a split transmitting module;

[0019] The method may include:

[0020] In the case of receiving a radio frequency signal, performing a first amplitude conditioning on the radio frequency signal, performing a power division operation on the amplitude conditioned radio frequency signal to obtain a first frequency signal and a second frequency signal, performing a second amplitude conditioning on the first frequency signal and performing a frequency division operation and a second amplitude conditioning on the second frequency signal to obtain a local oscillator preset frequency of the radio frequency signal, and obtaining a frequency value of an intermediate frequency signal according to the local oscillator preset frequency, and combining the frequency value and the local oscillator preset frequency to calculate the frequency value of the radio frequency signal;

[0021] When transmitting radio frequency signals, high output power and low harmonics of 100kHz to 1GHz are output.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: the modular RF transceiver test equipment provided in the embodiment of the present application can reduce interference by forming a plug-in structure through a split design of the receiving module and the RF transmitting module. The modular RF transceiver test equipment has RF receiving, transmitting and amplitude conditioning functions, and can realize automatic frequency testing from 400KHz to 3GHz, covering a wide range from low frequency to high frequency, and can improve the applicability of RF transceiver testing. And in this solution, by judging the frequency value of the intermediate frequency signal and the preset frequency of the local oscillator to calculate the frequency value of the RF signal, the accuracy of testing the actual RF frequency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A physical diagram of the overall connection of receiving and transmitting of the modular RF transceiver test equipment provided in an embodiment of the present application.

[0024] Figure 2 This is an overall block diagram of the modular RF transceiver test equipment provided in an embodiment of the present application.

[0025] Figure 3 This is a schematic diagram of the split transmission module outputting 100kHz-1GHz provided in an embodiment of the present application.

[0026] Figure 4 This is a schematic diagram of the automatic frequency test principle of the split-type RF receiving module provided in an embodiment of the present application.

[0027] Figure 5 This is a schematic diagram of the automatic frequency test principle of the split-type RF receiving module provided in an embodiment of the present application.

[0028] Figure 6 This is a schematic block diagram of the principle of a split-type RF receiving module provided in an embodiment of the present application.

[0029] Figure 7 This is a principle block diagram of the reference clock and local oscillator unit in the split RF transmission module provided in the embodiment of the present application.

[0030] Figure 8 A schematic block diagram of the principles of a transmitting unit provided in an embodiment of the present application.

[0031] Fig. 9 This is a principle block diagram of the power supply and control unit in the split transmitting module provided in an embodiment of the present application.

[0032] Fig.10 A schematic diagram of the steps of the RF transceiver testing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present application being limited to the following embodiments, and all technologies implemented based on the content of the present application belong to the scope of protection of the present application.

[0034] Unless otherwise specified, in the description of the specific embodiments of the present application, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", "side", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present application or simplifying the description in the specific embodiments to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present application.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. only distinguish one entity or operation from another entity or operation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] During the research, the applicant found that the specific mechanism of reducing interference in the RF transceiver module can be analyzed from multiple aspects. In the design of the RF module, shielding measures are an important means to reduce interference. Therefore, a RF transceiver test device can be provided based on a modular design. The modular design can separate the RF transmitter and receiver of the RF transceiver test device, which can reduce interference while ensuring that the information interaction relationship between the subsystems is clearer and more efficient.

[0038] Example 1

[0039] Please see Figure 1 and Figure 2 , Figure 1 A physical diagram of the overall connection of receiving and transmitting of the modular RF transceiver test equipment provided in an embodiment of the present application. Figure 2 The overall block diagram of the modular RF transceiver test device provided in the embodiment of the present application. The modular RF transceiver test device 10 may include a split RF receiving module 11 and a split transmitting module 12. The split RF receiving module 11 and the split transmitting module 12 are detachably connected to form a plug-in structure. The split RF receiving module 11 and the split transmitting module 12 are independent of each other and can be connected through a double-row pin and an RF connector.

[0040] The split RF receiving module 11 is provided with an RF input signal port and an intermediate frequency output signal port; the split transmitting module 12 is provided with an RF output signal port, an intermediate frequency input signal port, a reference input signal port, and a reference output signal port. The split transmitting module 12 is connected to the carrier board, and the split transmitting module 12 receives the test instruction through the PXIE interface on the carrier board. Among them, the reference input signal port and the reference output signal port can both be 10MHz signal ports.

[0041] Please see Figure 3 , Figure 3 The schematic diagram of the split-type transmitting module outputting 100kHz-1GHz provided in the embodiment of the present application. The circuit uses the LTC6432-15 chip. The original circuit adopts the differential mode. Here, the differential is changed to single-ended use, and the negative end of the differential is connected to the load. The amplifier can ensure the output of low-frequency signals, output a frequency of 100kHz to 1GHz, an output amplitude of 10dBm, and an output harmonic better than 25dBc.

[0042] The split RF receiving module 11 is configured to, when receiving a RF signal, perform a first amplitude conditioning on the RF signal, and perform a power division operation on the amplitude conditioned RF signal to obtain a first frequency signal and a second frequency signal, perform a second amplitude conditioning on the first frequency signal and perform a frequency division operation and a second amplitude conditioning on the second frequency signal to obtain a local oscillator preset frequency of the RF signal, and obtain a frequency value of the intermediate frequency signal according to the local oscillator preset frequency, and combine the frequency value and the local oscillator preset frequency to calculate the frequency value of the RF signal.

[0043] For example, the split type RF receiving module 11 may include an automatic frequency testing unit, see Figure 4 , Figure 5 and Figure 6 , Figure 4 and Figure 5 All of them are schematic diagrams of automatic frequency testing of the split-type RF receiving module provided in the embodiments of the present application. Figure 6 This is a schematic block diagram of the principle of a split-type RF receiving module provided in an embodiment of the present application.

[0044] Among them, the first amplitude conditioning is the amplitude conditioning of the input RF signal after it enters the power divider of the split RF receiving module 12 and splits the signal into one path. The main purpose is to adjust the amplitude of the RF signal to a range suitable for subsequent circuit processing. This is because the amplitude of the RF signal may fluctuate due to various factors (such as the signal strength received by the antenna, transmission loss, etc.), and direct processing may cause circuit saturation or reduced signal-to-noise ratio. The first amplitude conditioning can be performed by the limiter and attenuator in the split RF receiving module 12. The limiter is used to limit the maximum amplitude of the signal to prevent circuit overload; the attenuator is used to reduce the overall amplitude of the signal to ensure that the signal is in the linear processing area in the subsequent circuit.

[0045] The signal after the first amplitude conditioning is further split into two paths to obtain a first frequency signal and a second frequency signal. In the embodiment of the present application, the first frequency signal is a low frequency signal and the second frequency signal is a high frequency signal.

[0046] The low-frequency signal enters the low-frequency RF path for the second amplitude conditioning. The second amplitude conditioning ensures that the signal amplitude meets the FPGA input specification and further optimizes the signal quality, avoiding signal loss or erroneous processing due to excessively high or low amplitude, and improving the signal readability and accuracy.

[0047] The conditioned RF signal is directly input into the Field Programmable Gate Array (FPGA) of the split RF receiving module 11. The FPGA can perform a rough frequency calculation by counting through a counter, and preset the local oscillator frequency of the low-frequency signal.

[0048] In the automatic frequency test unit, the high-frequency signal passes through the power divider and then is input into the divider for four-way frequency division. After the second amplitude conditioning, the signal is divided into eight and the final output is amplified by the amplifier and input into the FPGA. The local oscillator frequency is also preset by counting.

[0049] The purpose of the second amplitude conditioning of high-frequency signals is that after frequency division, reconditioning and amplification, the signal may deviate from the ideal amplitude range again due to gain changes, nonlinear effects or transmission losses during the processing process. Therefore, the second amplitude conditioning is to further adjust the amplitude of the signal to ensure that it meets the requirements of the FPGA input port while maintaining the signal-to-noise ratio and integrity.

[0050] The split transmitting module 12 is configured to output high output power and low harmonics of 100 kHz to 1 GHz when transmitting radio frequency signals.

[0051] The receiving part of the split transmitting module 12 adopts the superheterodyne receiving principle. The RF signal is low-noise amplified, pre-filtered, and mixed to output an intermediate frequency signal, and then filtered, amplified, and mixed to output a second intermediate frequency signal, and then filtered, amplified, and filtered to finally output the intermediate frequency signal.

[0052] After the split transmitting module 12 completes the presetting of the local oscillator frequency, the intermediate frequency output of the split transmitting module 12 is sampled using an analog-to-digital converter (ADC), the sampled data is judged and counted, the frequency value of the current intermediate frequency signal is calculated, and the actual radio frequency can be determined by subtracting the theoretical value of the intermediate frequency from the frequency value of the current intermediate frequency signal and adding the preset frequency of the local oscillator. The modular radio frequency transceiver test equipment 10 can perform frequency testing in the frequency range of 100KHz to 1GHz. In the embodiment of the present application, the theoretical value of the intermediate frequency can be 70MHz.

[0053] The modular RF transceiver test equipment provided in the embodiment of the present application can reduce interference by designing the receiving module and the RF transmitting module in a split type to form a plug-in structure. The modular RF transceiver test equipment has RF receiving, transmitting and amplitude conditioning functions, and can realize automatic frequency testing from 400KHz to 3GHz, covering a wide range from low frequency to high frequency, and can improve the applicability of RF transceiver testing. In addition, in this solution, the frequency value of the RF signal is calculated by judging the frequency value of the intermediate frequency signal and the preset frequency of the local oscillator, which can improve the accuracy of testing the actual RF frequency.

[0054] Example 2

[0055] This embodiment is an example of the split-type transmitting module 12 in the above-mentioned embodiment 1 including a reference clock and a local oscillator unit. Figure 7 , Figure 7 This is a principle block diagram of the reference clock and local oscillator unit in the split RF transmission module provided in the embodiment of the present application.

[0056] The split-type transmitting module 12 further includes a reference clock and local oscillator unit, which is configured to generate multiple reference clock signals and local oscillator signals.

[0057] The internal reference clock and the external reference clock of the reference clock and local oscillator unit enter the power divider after being selected by the switch. The power divider divides the reference clock signal into three paths: the first path outputs the reference clock signal through the divider and the filter; the second and third paths pass through the integrated phase-locked loop, amplifier, and filter respectively to output the local oscillator signals Lo1 and Lo2.

[0058] Example 3

[0059] This embodiment is an example of the split-type transmitting module 12 in the above-mentioned embodiment 1 including a transmitting unit. Figure 8 , Figure 8 A schematic block diagram of the principles of a transmitting unit provided in an embodiment of the present application.

[0060] The transmitting unit is configured to mix the input intermediate frequency signal with the two local oscillator signals to obtain a first intermediate frequency signal; mix the first intermediate frequency signal with the local oscillator signal to obtain an initial radio frequency signal, and the initial radio frequency signal passes through the first filter, the amplifier and the second filter in the transmitting unit respectively as the radio frequency signal output of the transmitting unit; wherein the two local oscillator signals and the local oscillator signal are generated by the reference clock and the local oscillator unit.

[0061] In the transmitting unit, the input intermediate frequency signal enters the mixer through the filter. The mixer mixes the input intermediate frequency signal with two local oscillators to output an intermediate frequency signal. The intermediate frequency signal is mixed with a local oscillator signal through the filter and the amplifier to output a radio frequency signal. The radio frequency signal is output through the filter, the amplifier, and the filter.

[0062] Example 4

[0063] This embodiment is an example of the split-type transmitting module 12 in the above-mentioned embodiment 1 including a power supply and a control unit. Fig. 9 , Fig. 9 This is a principle block diagram of the power supply and control unit in the split transmitting module provided in an embodiment of the present application.

[0064] The power supply and control unit is configured to supply power to each unit in the split transmitting module 12 and analyze external control signals.

[0065] The +12V power supply enters the DC / DC, and the output voltage of the DC / DC enters the LDO to generate +1.0V, +3.3V, and +5V, which respectively power the chips of each unit; the external control signal enters the FPGA, and the FPGA parses the external control signal and generates corresponding control commands to control the chips of each module.

[0066] The functional units in the above embodiments may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit, and the above integrated units may be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present application.

[0067] Example 5

[0068] Please see Fig.10 , Fig.10 A schematic diagram of the steps of the RF transceiver test method provided in an embodiment of the present application. The RF transceiver test method can be applied to the modular RF transceiver test device 10 in the above-mentioned embodiment 1, and the method may include:

[0069] S101. When a radio frequency signal is received, a first amplitude conditioning is performed on the radio frequency signal, and a power division operation is performed on the amplitude conditioned radio frequency signal to obtain a first frequency signal and a second frequency signal, a second amplitude conditioning is performed on the first frequency signal, and a frequency division operation and a second amplitude conditioning are performed on the second frequency signal to obtain a local oscillator preset frequency of the radio frequency signal, and a frequency value of an intermediate frequency signal is obtained according to the local oscillator preset frequency, and the frequency value and the local oscillator preset frequency are combined to calculate the frequency value of the radio frequency signal.

[0070] S102 . When transmitting a radio frequency signal, output a high output power low harmonic of 100 kHz to 1 GHz.

[0071] The implementation process of the radio frequency transceiver test method can refer to the specific description content in the above embodiments 1-4, which will not be repeated here.

[0072] In the above implementation process, the modular RF transceiver test equipment has RF receiving, transmitting and amplitude conditioning functions, and can realize automatic frequency testing from 100kHz to 1GHz400KHz to 3GHz, covering a wide range from low frequency to high frequency, which can improve the applicability of RF transceiver testing. In addition, in this solution, the frequency value of the RF signal is calculated by judging the frequency value of the intermediate frequency signal and the preset frequency of the local oscillator, which can improve the accuracy of testing the actual RF frequency.

[0073] Based on the same application concept, an embodiment of the present application also provides a computer device, which may include a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method described in the above description is implemented.

[0074] Based on the same application concept, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described in the above description is implemented.

[0075] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A modular radio frequency transceiver test device, characterized in that: Including split transmitter module and split RF receiver module: The split RF receiving module is configured to, when receiving a RF signal, perform a first amplitude conditioning on the RF signal, perform a power division operation on the amplitude conditioned RF signal to obtain a first frequency signal and a second frequency signal, perform a second amplitude conditioning on the first frequency signal and perform a frequency division operation and a second amplitude conditioning on the second frequency signal to obtain a local oscillator preset frequency of the RF signal, obtain a frequency value of an intermediate frequency signal according to the local oscillator preset frequency, and combine the frequency value and the local oscillator preset frequency to calculate the frequency value of the RF signal; The split-type transmitting module is configured to output high output power and low harmonics of 100kHz to 1GHz when transmitting radio frequency signals.

2. The method according to claim 1, characterized in that The split type radio frequency receiving module comprises an automatic frequency testing unit; the automatic frequency testing circuit is used for performing a second amplitude conditioning on the first frequency signal and a second amplitude conditioning on the second frequency signal; and performing a frequency division operation on the second frequency signal.

3. The device according to claim 1, characterized in that The split transmitting module and the split radio frequency receiving module are detachably connected to form a plug-in structure.

4. The device according to claim 1, characterized in that The split-type transmitting module also includes a reference clock and local oscillator unit, which is configured to generate multiple reference clock signals and local oscillator signals.

5. The device according to claim 1, characterized in that The split-type transmitting module includes a transmitting unit, and the transmitting unit is configured to mix an input intermediate frequency signal with two local oscillator signals to obtain a first intermediate frequency signal; The first intermediate frequency signal is mixed with a local oscillator signal to obtain an initial radio frequency signal, and the initial radio frequency signal is respectively passed through a first filter, an amplifier, and a second filter in the transmitting unit as the radio frequency signal output of the transmitting unit; wherein the two local oscillator signals and the local oscillator signal are generated by a reference clock and a local oscillator unit.

6. The device according to claim 1, characterized in that The split-type transmitting module also includes a power supply and a control unit, which are configured to supply power to each unit in the split-type RF receiving module and analyze external control signals.

7. The device according to claim 1, characterized in that The frequency range of the radio frequency signal transmitted by the split-type transmitting module is 100kHz to 1GHz.

8. The device according to claim 1, characterized in that The split-type transmitting module is provided with a radio frequency output signal port, an intermediate frequency input signal port, a reference input signal port, and a reference output signal port; The split radio frequency receiving module is provided with a radio frequency input signal port and an intermediate frequency output signal port.

9. The device according to claim 1, characterized in that The split transmitting module is connected to the carrier board, and the split transmitting module receives the test instruction through the PXIE interface on the carrier board.

10. A radio frequency transceiver testing method, characterized in that: Applicable to modular radio frequency transceiver test equipment, the modular radio frequency transceiver test equipment includes a split radio frequency receiving module and a split transmitting module; The method comprises: In the case of receiving a radio frequency signal, performing a first amplitude conditioning on the radio frequency signal, performing a power division operation on the amplitude conditioned radio frequency signal to obtain a first frequency signal and a second frequency signal, performing a second amplitude conditioning on the first frequency signal and performing a frequency division operation and a second amplitude conditioning on the second frequency signal to obtain a local oscillator preset frequency of the radio frequency signal, and obtaining a frequency value of an intermediate frequency signal according to the local oscillator preset frequency, and combining the frequency value and the local oscillator preset frequency to calculate the frequency value of the radio frequency signal; When transmitting radio frequency signals, high output power and low harmonics of 100kHz to 1GHz are output.

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