Antenna with radio frequency measuring device

Abstract

The present invention provides an antenna with a radio frequency measuring device, comprising an antenna and a radio frequency measuring device; wherein the antenna comprises an antenna vibrator, a vibrator bracket and a signal line; the radio frequency measuring device comprises a shielding shell, a balun, a preselector, a high-frequency amplification module, a mixing module, a detection module, a data processing module, an optical fiber transceiver module and a power module; the balun, the preselector, the high-frequency amplification module, the mixing module, the detection module, the data processing module, the optical fiber transceiver module and the power module are all arranged in the shielding shell; the antenna with a radio frequency measuring device provided by the present invention eliminates the cable loss caused by the radio frequency cable in the conventional test system and greatly reduces the influence of the test uncertainty by adopting an integrated design, and the antenna calibration and the receiver calibration can be completed at one time, so the overall test is more convenient and the test result is more accurate and reliable.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic compatibility testing, in particular to an antenna with a radio frequency measuring device. Background Art

[0002] Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate normally in its electromagnetic environment without causing intolerable electromagnetic interference to any device in the environment. On the one hand, electromagnetic compatibility means that the electromagnetic interference generated by the device to the environment in which it is located during normal operation cannot exceed a certain limit; on the other hand, it means that the device has a certain degree of immunity to the electromagnetic interference in the environment in which it is located.

[0003] The existing electromagnetic compatibility test system usually includes an anechoic chamber, an antenna arranged inside the anechoic chamber, an amplifier and a receiver arranged outside the anechoic chamber. The antenna receives the electromagnetic signal emitted by the test product, and then sends it to the receiver through a radio frequency cable for reading; however, the traditional receiver needs to adapt to the test frequency band of different antennas, so its internal circuit needs to meet a sufficiently wide coverage frequency band range, which makes it larger in size. At the same time, because it needs to meet the user's reading and debugging requirements for the detection signal, it needs to be equipped with a display screen, buttons and other equipment. The electromagnetic compatibility performance of the thing itself is poor and it cannot be used in the anechoic chamber; if it is set outside the anechoic chamber, an RF cable is required to connect the antenna, but the RF cable itself has a certain line resistance. An overly long RF cable will attenuate the signal received by the test antenna, thereby reducing the sensitivity and accuracy of the test data. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an antenna with a built-in radio frequency measuring device. The antenna adopts an integrated design, and the antenna is directly connected to the radio frequency measuring device, thereby avoiding the attenuation effect caused by the radio frequency cable. At the same time, by reducing the frequency band covered by the radio frequency measuring device, deleting functions that are useless for the test frequency band, and canceling some peripherals, the size of the antenna is reduced, and the antenna can be placed in a radio wave darkroom or a shielded room for use as a whole.

[0005] The present invention adopts the following technical solutions to achieve the above-mentioned purpose:

[0006] An antenna with a radio frequency measuring device provided by the present invention comprises an antenna and a radio frequency measuring device;

[0007] The antenna includes an antenna vibrator, a vibrator bracket and a signal line; the radio frequency measurement device includes a shielding shell, a balun, a preselector, a high-frequency amplification module, a mixing module, a detection module, a data processing module, an optical fiber transceiver module and a power supply module;

[0008] The balun, preselector, high-frequency amplification module, mixing module, detection module, data processing module, optical fiber transceiver module and power module are all arranged in the shielding shell; the antenna vibrator is fixed on the vibrator bracket, one end of the signal line is connected to the antenna vibrator, and the other end of the signal line is connected to the balun in the shielding shell; the shielding shell is fixedly connected to the vibrator bracket;

[0009] The shielding shell is also provided with an RF signal output port and an RF signal input port; wherein the output end of the balun is connected to one end of the RF signal output port located in the shielding shell; the end of the RF signal input port located in the shielding shell is connected to the input end of the preselector; the output end of the preselector is connected to the input end of the high-frequency amplification module, the output end of the high-frequency amplification module is connected to the input end of the mixing module, the output end of the mixing module is connected to the input end of the detection module, the output end of the detection module is connected to the input end of the data processing module, and the data processing module is also connected to the optical fiber transceiver module; the shielding shell is also provided with an optical signal output interface, and the output end of the optical fiber transceiver module is connected to the optical signal output interface

[0010] The power supply module is used to supply power to the balun, preselector, high-frequency amplification module, mixing module, detection module, data processing module, and optical fiber transceiver module;

[0011] The coverage frequency band of the radio frequency measuring device matches the receiving frequency band of the antenna.

[0012] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes an input attenuator;

[0013] The input end of the input attenuator is connected to one end of the RF signal output port located outside the shielding shell, and the output end cable of the input attenuator is connected to one end of the RF signal input port located outside the shielding shell.

[0014] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes an input amplifier;

[0015] The input end of the input amplifier is connected to one end of the RF signal output port located outside the shielding shell, and the output end cable of the input amplifier is connected to one end of the RF signal input port located outside the shielding shell.

[0016] In one embodiment of the present invention, the mixing module includes a mixer, an oscillator, an intermediate frequency filter, an intermediate frequency attenuator and an intermediate frequency amplifier;

[0017] Among them, the first input end of the mixer is connected to the output end of the high-frequency amplification module, the second input end of the mixer is connected to the oscillator, the output end of the mixer is connected to the input end of the intermediate frequency filter, the output end of the intermediate frequency filter is connected to the input end of the intermediate frequency attenuator, the output end of the intermediate frequency attenuator is connected to the input end of the intermediate frequency amplifier, and the output end of the intermediate frequency amplifier is connected to the detection module.

[0018] In one embodiment of the present invention, the detection module includes a first radio frequency switch, a quasi-peak detector, an average value detector, a peak value detector, an effective value detector, a second radio frequency switch and a low frequency amplifier;

[0019] The input end of the first RF switch is connected to the output end of the frequency mixing module, the first output end of the first RF switch is connected to the input end of the quasi-peak detector; the second output end of the first RF switch is connected to the input end of the average value detector; the third output end of the first RF switch is connected to the input end of the peak detector; the fourth output end of the first RF switch is connected to the input end of the effective value detector;

[0020] The output end of the quasi-peak detector is connected to the first input end of the second RF switch; the output end of the average value detector is connected to the second input end of the second RF switch; the output end of the peak detector is connected to the third input end of the second RF switch; the output end of the effective value detector is connected to the fourth input end of the second RF switch; the output end of the second RF switch is connected to the input end of the low-frequency amplifier, and the output end of the low-frequency amplifier is connected to the data processing module;

[0021] The control end of the first RF switch and the control end of the second RF switch are both connected to the data processing module.

[0022] In one embodiment of the present invention, a data interface is further provided on the shielding shell; the data interface is connected to the data processing module;

[0023] The data interface is used to enable the data processing module to communicate data with the host computer.

[0024] In one embodiment of the present invention, at least one indicator light is further provided on the shielding shell;

[0025] The indicator light is connected to the data processing module; the data processing module is also used to control the working state of the indicator light.

[0026] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes a laser power supply module;

[0027] One end of the laser power supply module is connected to the laser generator, and the other end of the laser power supply module is connected to the power supply module.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The antenna with a radio frequency measuring device provided by the present invention eliminates the cable loss caused by the radio frequency cable in the conventional test system and greatly reduces the influence of the test uncertainty by adopting an integrated design. Antenna calibration and receiver calibration can be completed at one time, and the overall test is more convenient and the test results are more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an antenna with a radio frequency measuring device in one embodiment of the present invention;

[0031] Figure 2 FIG. 4 is a schematic diagram of the structure of a receiver according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, wherein the illustrative embodiments and descriptions are only used to explain the present invention but are not intended to limit the present invention.

[0033] It should be noted that, in the present invention, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The present invention provides an antenna with a radio frequency measuring device, such as Figure 1 and Figure 2 As shown, it includes an antenna 100 and a radio frequency measuring device 200;

[0037] The antenna 100 includes an antenna 100 vibrator, a vibrator bracket and a signal line; the radio frequency measurement device 200 includes a shielding shell 210, a balun 220, a preselector 230, a high-frequency amplification module 240, a mixing module 250, a detection module 260, a data processing module 270, an optical fiber transceiver module 280 and a power supply module 290;

[0038] The balun 220, the preselector 230, the high-frequency amplification module 240, the mixing module 250, the detection module 260, the data processing module 270, the optical fiber transceiver module 280 and the power module 290 are all arranged in the shielding shell 210; the antenna 100 vibrator is fixed on the vibrator bracket, one end of the signal line is connected to the antenna 100 vibrator, and the other end of the signal line is connected to the balun 220 in the shielding shell 210; the shielding shell 210 is fixedly connected to the vibrator bracket;

[0039] The shielding shell 210 is also provided with a radio frequency signal output port 211 and a radio frequency signal input port 212; wherein, the output end of the balun 220 is connected to one end of the radio frequency signal output port 211 located in the shielding shell 210; the end of the radio frequency signal input port 212 located in the shielding shell 210 is connected to the input end of the preselector 230; the output end of the preselector 230 is connected to the input end of the high-frequency amplification module 240, the output end of the high-frequency amplification module 240 is connected to the input end of the mixing module 250, the output end of the mixing module 250 is connected to the input end of the detection module 260, the output end of the detection module 260 is connected to the input end of the data processing module 270, and the data processing module 270 is also connected to the optical fiber transceiver module 280; the shielding shell 210 is also provided with an optical signal output interface 213, and the output end of the optical fiber transceiver module 280 is connected to the optical signal output interface 213

[0040] The power module 290 is used to supply power to the balun 220, the preselector 230, the high-frequency amplification module 240, the mixing module 250, the detection module 260, the data processing module 270, and the optical fiber transceiver module 280;

[0041] The coverage frequency band of the radio frequency measurement device 200 matches the receiving frequency band of the antenna 100;

[0042] The detection module 260 includes a first RF switch 261, a quasi-peak detector 262, an average detector 263, a peak detector 264, an effective value detector 265, a second RF switch 266 and a low frequency amplifier 267;

[0043] Specifically, the input end of the first RF switch 261 is connected to the output end of the mixing module, the first output end of the first RF switch 261 is connected to the input end of the quasi-peak detector 262; the second output end of the first RF switch 261 is connected to the input end of the average value detector 263; the third output end of the first RF switch 261 is connected to the input end of the peak detector 264; the fourth output end of the first RF switch 261 is connected to the input end of the effective value detector 265;

[0044] The output end of the quasi-peak detector 262 is connected to the first input end of the second RF switch 266; the output end of the average value detector 263 is connected to the second input end of the second RF switch 266; the output end of the peak detector 264 is connected to the third input end of the second RF switch 266; the output end of the effective value detector 265 is connected to the fourth input end of the second RF switch 266; the output end of the second RF switch 266 is connected to the input end of the low-frequency amplifier 267, and the output end of the low-frequency amplifier 267 is connected to the data processing module;

[0045] The control end of the first RF switch 261 and the control end of the second RF switch 266 are both connected to the data processing module.

[0046] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes an input attenuator;

[0047] The input end of the input attenuator is connected to one end of the RF signal output port 211 outside the shielding shell 210 , and the output end of the input attenuator is connected to one end of the RF signal input port 212 outside the shielding shell 210 .

[0048] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes an input amplifier;

[0049] The input end of the input amplifier is connected to one end of the RF signal output port 211 outside the shielding shell 210 , and the output end of the input amplifier is connected to one end of the RF signal input port 212 outside the shielding shell 210 .

[0050] In one embodiment of the present invention, the shielding shell 210 is further provided with a data interface; the data interface is connected to the data processing module 270;

[0051] The data interface is used to enable the data processing module 270 to communicate data with a host computer.

[0052] In one embodiment of the present invention, at least one indicator light is further provided on the shielding shell 210;

[0053] The indicator light is connected to the data processing module 270; the data processing module 270 is also used to control the working state of the indicator light.

[0054] In one embodiment of the present invention, the antenna with a radio frequency measuring device further includes a laser power supply module;

[0055] One end of the laser power supply module is connected to the laser generator, and the other end of the laser power supply module is connected to the power supply module 290 .

[0056] In a specific application scenario of the present invention, the antenna with the radio frequency measuring device provided by the present invention is placed in an anechoic chamber or a shielded chamber for use as a whole, and is connected to a host computer arranged outside the anechoic chamber or the shielded chamber through an optical fiber; a type-c data interface is also provided on the shielding shell of the radio frequency measuring device, and a tester can perform parameter setting or debugging of the radio frequency measuring device through the data interface;

[0057] The antenna with a radio frequency measuring device provided by the present invention adopts an integrated design, so the tester does not need to debug again when using it, and can directly start the test; during the test, the tester chooses whether to connect an external pre-attenuator or pre-amplifier according to the size of the signal to be tested. When the pre-attenuator or pre-amplifier is not needed, the tester directly connects the radio frequency signal output port on the shielding shell with the radio frequency signal input port with a radio frequency cable; when the electromagnetic signal received by the antenna 100, the radio frequency measuring device 200 performs corresponding filtering, amplification and signal processing on the received signal, and then sends it to the upper computer outside the anechoic chamber through an optical fiber. After the upper computer converts the received optical signal into an electrical signal again, the upper computer displays the relevant data of the received electromagnetic signal to the tester through a display screen; at the same time, the tester can also judge whether the working state of the radio frequency measuring device is normal by observing the indicator light signal on the radio frequency measuring device through the observation window of the anechoic chamber;

[0058] When the tester needs to calibrate or repair the antenna, the test equipment can be connected to the RF signal output port 211 on the RF measuring device to obtain the antenna's receiving signal and verify the antenna's working status; when the tester needs to calibrate or repair the RF measuring device, the test equipment can be connected to the RF signal input port 212 on the RF measuring device to simulate signal input and verify the working status of the RF measuring device.

[0059] The antenna with a radio frequency measuring device provided by the present invention first reduces the coverage frequency band of the radio frequency measuring device 200 so that it is only adapted to the receiving frequency band of the antenna 100, thereby effectively reducing the volume of each component in the receiver, and removing traditional display and control devices such as a display screen and a keyboard, and instead communicating with a host computer through an optical fiber module, thereby realizing functions such as displaying the received signal of the receiver and adjusting the receiver parameters, so that the radio frequency measuring device can be arranged as a whole in a shielding shell to meet the requirements of the electromagnetic compatibility test for the electromagnetic compatibility performance of the auxiliary test equipment; at the same time, since the antenna 100 and the radio frequency measuring device 200 are directly connected, the uncertainty caused by the radio frequency cable, the radio frequency signal connector and other equipment in the traditional connection is avoided, thereby further improving the accuracy of the test data.

[0060] Obviously, the above embodiments are merely examples for more clearly expressing the technical solution of the present invention, rather than limiting the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description, and these all belong to the protection scope of the present invention without departing from the concept of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An antenna with a radio frequency measuring device, characterized in that: including an antenna and a radio frequency measuring device; The antenna includes an antenna vibrator, a vibrator bracket and a signal line; the radio frequency measurement device includes a shielding shell, a balun, a preselector, a high-frequency amplification module, a mixing module, a detection module, a data processing module, an optical fiber transceiver module and a power supply module; The balun, preselector, high-frequency amplification module, mixing module, detection module, data processing module, optical fiber transceiver module and power module are all arranged in the shielding shell; the antenna vibrator is fixed on the vibrator bracket, one end of the signal line is connected to the antenna vibrator, and the other end of the signal line is connected to the balun in the shielding shell; the shielding shell is fixedly connected to the vibrator bracket; The shielding shell is also provided with a radio frequency signal output port and a radio frequency signal input port; wherein the output end of the balun is connected to one end of the radio frequency signal output port located in the shielding shell; the one end of the radio frequency signal input port located in the shielding shell is connected to the input end of the preselector; the output end of the preselector is connected to the input end of the high-frequency amplification module, the output end of the high-frequency amplification module is connected to the input end of the mixing module, the output end of the mixing module is connected to the input end of the detection module, the output end of the detection module is connected to the input end of the data processing module, and the data processing module is also connected to the optical fiber transceiver module; the shielding shell is also provided with an optical signal output interface, and the output end of the optical fiber transceiver module is connected to the optical signal output interface; The power supply module is used to supply power to the balun, preselector, high-frequency amplification module, mixing module, detection module, data processing module, and optical fiber transceiver module; The coverage frequency band of the radio frequency measuring device matches the receiving frequency band of the antenna.

2. An antenna with a radio frequency measuring device as claimed in claim 1, characterized in that: The antenna with the radio frequency measuring device further comprises an input attenuator; The input end of the input attenuator is connected to one end of the RF signal output port located outside the shielding shell, and the output end cable of the input attenuator is connected to one end of the RF signal input port located outside the shielding shell.

3. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The antenna with a radio frequency measuring device further includes an input amplifier; The input end of the input amplifier is connected to one end of the RF signal output port located outside the shielding shell, and the output end cable of the input amplifier is connected to one end of the RF signal input port located outside the shielding shell.

4. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The mixing module includes a mixer, an oscillator, an intermediate frequency filter, an intermediate frequency attenuator and an intermediate frequency amplifier; Among them, the first input end of the mixer is connected to the output end of the high-frequency amplification module, the second input end of the mixer is connected to the oscillator, the output end of the mixer is connected to the input end of the intermediate frequency filter, the output end of the intermediate frequency filter is connected to the input end of the intermediate frequency attenuator, the output end of the intermediate frequency attenuator is connected to the input end of the intermediate frequency amplifier, and the output end of the intermediate frequency amplifier is connected to the detection module.

5. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The detection module includes a first radio frequency switch, a quasi-peak detector, an average value detector, a peak value detector, an effective value detector, a second radio frequency switch and a low frequency amplifier; The input end of the first RF switch is connected to the output end of the frequency mixing module, the first output end of the first RF switch is connected to the input end of the quasi-peak detector; the second output end of the first RF switch is connected to the input end of the average value detector; the third output end of the first RF switch is connected to the input end of the peak detector; the fourth output end of the first RF switch is connected to the input end of the effective value detector; The output end of the quasi-peak detector is connected to the first input end of the second RF switch; the output end of the average value detector is connected to the second input end of the second RF switch; the output end of the peak detector is connected to the third input end of the second RF switch; the output end of the effective value detector is connected to the fourth input end of the second RF switch; the output end of the second RF switch is connected to the input end of the low-frequency amplifier, and the output end of the low-frequency amplifier is connected to the data processing module; The control end of the first RF switch and the control end of the second RF switch are both connected to the data processing module.

6. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The shielding shell is also provided with a data interface; the data interface is connected to the data processing module; The data interface is used to enable the data processing module to communicate data with the host computer.

7. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The shielding shell is also provided with at least one indicator light; The indicator light is connected to the data processing module; the data processing module is also used to control the working state of the indicator light.

8. The antenna with a radio frequency measuring device according to claim 1, characterized in that: The antenna with the radio frequency measuring device also includes a laser power supply module; One end of the laser power supply module is connected to the laser generator, and the other end of the laser power supply module is connected to the power supply module.

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