CN215005610U

CN215005610U - RF power detection device and production test platform of radio frequency product

Info

Publication number: CN215005610U
Application number: CN202120859711.XU
Authority: CN
Inventors: 陈毅
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-03
Anticipated expiration: 2031-04-25

Abstract

The utility model provides a production test platform of RF power detection device and radio frequency product, this RF power detection device includes: the double-path RF detector is used for converting the two paths of RF power signals into two paths of direct-current voltage signals; two RF interfaces for connecting the two inputs of the two-way RF detector to the tested piece; the signal adjusting circuit is used for amplifying the detection voltage output by the two-way RF detector; the microcontroller is used for carrying out analog-to-digital conversion on the detection voltage provided by the signal adjusting circuit and looking up a table to obtain a power value; the microcontroller is in communication connection with external equipment through a USB interface. The production test platform of the radio frequency product comprises: the two RF interfaces of the RF power detection device are connected with the tested piece through two couplers, and the USB interface of the RF power detection device is connected with a computer. The cost of power measurement can be greatly reduced.

Description

RF power detection device and production test platform of radio frequency product

Technical Field

The utility model relates to a detection device of radio frequency product especially relates to RF power detection device.

Background

During production testing of Radio Frequency (RF) products, for example: the high-power test of the filter, on the IMD (inter modulation distortion) test platform, all need to use the signal source, power amplifier and power meter, wherein the power meter is used for detecting the actual power of the test platform. The existing power test usually adopts a standard power meter, so that the equipment cost of a production test platform of a radio frequency product is higher, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide an RF power detection device, cost that can greatly reduced power measurement.

The utility model provides a technical scheme that its technical problem adopted includes: an RF power detection device is provided, which comprises a two-way RF detector, a first RF interface, a second RF interface, a signal adjusting circuit and a microcontroller; the first RF interface is connected with one input of the double-path RF detector, the second RF interface is connected with the other input of the double-path RF detector, and the signal adjusting circuit is connected with the two outputs of the double-path RF detector; and the microcontroller is connected with the output of the signal adjusting circuit.

In some embodiments, the dual RF detector is a dual channel RF detector or two simultaneous single channel RF detectors.

In some embodiments, the two-way RF detector is an RMS detector.

In some embodiments, the dual RF detector is a logarithmic detector.

In some embodiments, the signal conditioning circuit includes an operational amplifier.

In some embodiments, the microcontroller has an analog-to-digital converter built in.

In some embodiments, the microcontroller comprises a UART-USB converter connected to its UART port, the UART-USB converter being connected to the USB interface.

In some embodiments, a non-volatile memory is also included that is coupled to the microcontroller.

In some embodiments, a power supply circuit is also included, which is connected to other circuit components within the detection device.

The utility model provides a technical scheme that its technical problem adopted still includes: providing a production test platform of a radio frequency product, comprising the RF power detection device, the first coupler, the second coupler and a computer; the RF power detection device is connected with the first coupler through a first RF interface, connected with the second coupler through a second RF interface and connected with the computer through a USB interface of the microcontroller.

Compared with the prior art, the utility model discloses an adopt double-circuit RF detector, first RF interface, second RF interface, signal conditioning circuit, microcontroller and USB interface to constitute RF power detection device ingeniously, can replace the standard power meter that conventional adopted, cost that can greatly reduced power measurement.

Drawings

Fig. 1 illustrates a block diagram of the RF power detection device of the present invention.

Fig. 2 illustrates a block diagram of the production test platform for radio frequency products of the present invention.

Wherein the reference numerals are as follows: 100 platform; 10 a detection device; 1 a two-way RF detector; 2 a first RF interface; 3 a second RF interface; 4 a signal conditioning circuit; 5 a microcontroller; 6 UART-USB converter; 7 USB interface; 8 a non-volatile memory; 9, a power supply; 20 a first coupler; 30 a second coupler; 50 computers; 60 signal source; 70 a power amplifier; 80 power load; 200 of the tested piece.

Detailed Description

For the purpose of illustrating the structure and features of the present invention in detail, the following preferred embodiments are described in conjunction with the accompanying drawings.

Referring to fig. 1, fig. 1 illustrates a block diagram of an RF power detection device according to the present invention. The utility model provides a RF power detection device 10, it includes: a dual RF detector 1, a first RF interface 2, a second RF interface 3, a signal conditioning circuit 4, a microcontroller 5 and a power supply 9.

The dual RF detector 1 is used to convert the two RF power signals into two dc voltage signals. The dual-channel RF detector 1 is realized by adopting a dual-channel RF detector, or two single-channel RF detectors are realized in a combined mode. For example, an RF detector refers to an RMS (Root mean Square) detector or a logarithmic detector.

The first RF interface 2 is connected with one input of the two-way RF detector 1 and is used for externally connecting a tested piece; the second RF interface 3 is connected with the other input of the two-way RF detector 1 and is used for externally connecting a tested piece.

It should be noted that the detection apparatus 10 employs a two-way RF power detection structure implemented by a two-way RF detector 1 and two

RF interfaces

2 and 3, rather than a single-way RF power detection structure implemented by a single-way RF detector and a single RF interface, or an RF power detection structure implemented by more than three ways of RF detectors and more than three RF interfaces, which is an optimized design, and can well meet the requirements of production test of radio frequency products such as filters.

The signal adjusting circuit 4 is connected with the two-way output of the two-way RF detector 1 and is used for amplifying the detection voltage output by the two-way RF detector 1, so that the voltage output by the two-way RF detector 1 in the whole detectable power dynamic range is reasonably amplified to the upper and lower limit ranges of the reference voltage of the built-in analog-digital converter of the microcontroller 5. The signal conditioning circuit 4 is implemented using an operational amplifier.

The analog-to-digital converter built into the microcontroller 5 converts the adjusted detector output voltage into hexadecimal data, which is converted to power values by looking up and comparing a frequency and power calibration table stored in non-volatile memory, for example: expressed in dBm (dew relative to one milliwatt)). That is, the microcontroller 5 implements analog-to-digital conversion, table lookup, and communication functions.

It should be noted that the software implementation of the analog-to-digital conversion, the table lookup and the communication functions all belong to the conventional function implementation of the microcontroller 5, which is not the contribution of the technology of this patent and is not described herein again.

In some embodiments, if the microcontroller 5 itself does not support USB communication, it is further required to include a UART-USB converter 6 and a USB interface 7 for converting UART (Universal Asynchronous Receiver/Transmitter) to USB (Universal Serial Bus), one end of which is connected to the UART port of the microcontroller 5, and the other end of which is connected to the USB interface 7. It will be appreciated that the UART-USB converter 6 may be omitted depending on the choice of the microcontroller 5, for example in the case where the microcontroller 5 itself supports USB communication.

The USB interface 7 is used to realize USB communication connection between the microcontroller 5 and external devices. The USB interface 7 is for receiving a dc 5V input from outside.

In some embodiments, a non-volatile memory 8 is also included, the non-volatile memory 8 being coupled to the microcontroller 5 for storing the aforementioned frequency and power calibration data tables. It will be appreciated that the non-volatile memory 8 may be provided depending on the choice of microcontroller 5, for example, where the microcontroller 5 itself supports the built-in non-volatile memory, then the non-volatile memory 8 may be omitted.

In some embodiments, the device further includes a power supply 9, which provides the corresponding processed dc 5V input received from the USB interface 7 to other circuits in the detection apparatus 10. The power supply 9 includes, for example, a power management chip, a rechargeable battery, etc., wherein the rechargeable battery can be charged by the USB interface 7 and provide power to other circuits in the detection apparatus 10. It will be appreciated that the power supply 9 may be omitted in the event that an external power supply is selected for power.

The RF power detection device 10 of the present invention needs to be calibrated for frequency and power before use. Calibration data is stored in the nonvolatile memory 8, a table corresponding to calibration is prepared (see the following table) based on the characteristics of the RF detector, a plurality of power values at a plurality of bins are calibrated respectively, and the calibration values are stored in addresses designated by the nonvolatile memory 8.

Before calibration, a calibration signal source needs to be connected with a standard power meter, and then calibration and recording are performed according to the frequency points and the power values in the table. During calibration, a calibration signal source needs to be connected to the first RF interface 2 or the second RF interface 3 of the detection device 10, a signal source sets a frequency point and output power according to the values recorded above, and after output is stable, an analog-to-digital conversion value read by the microcontroller 5 at the moment is stored in a corresponding address.

When the RF power detection device 10 detects, the two RF interfaces of the two-way RF detector are connected to the detected object, and the two-way RF detector converts the two-way RF power signals into two-way dc voltage signals and outputs the two-way dc voltage signals to the signal adjustment circuit. The signal adjusting circuit amplifies the detection voltage output by the two-way RF detector and outputs the amplified detection voltage to the microcontroller. And then the microcontroller performs analog-to-digital conversion on the detection voltage provided by the signal adjusting circuit and looks up the table to obtain a power value.

Referring to fig. 2, fig. 2 illustrates a block diagram of a production test platform for radio frequency products according to the present invention. The utility model provides a production test platform 100 of radio frequency product, it includes: the RF power detection apparatus 10, the first coupler 20, the second coupler 30, and the computer 50 as described above. The production test platform 100 can be used for production testing of power dependence on a piece under test 200 such as a filter.

Specifically, the production test platform further includes a first coupler 20, a second coupler 30, a computer 50, a signal source 60, a power amplifier 70, and a power load 80. The signal source 60 is connected to the computer 50 and one end of the power amplifier 70, and the other end of the power amplifier is connected to the input end of the device under test 200. The RF power detection device 10 is connected to the first coupler 20 through the first RF interface 2, and connected to the second coupler 30 through the second RF interface 3, and the first coupler 20 and the second coupler 30 are respectively connected to the device under test 200. The microcontroller 5 of the RF power detection device 10 is connected to the computer 50 via the USB interface 7. The power load 80 is connected to the first coupler 20 and the second coupler 30, respectively.

The computer 50 is used for receiving the RF power detection result provided by the RF power detection device 10, displaying and storing the RF power detection result.

The computer 50 controls the signal output from the signal source 60 so that the power delivered to the rf input of the dut 200 is controlled. Thereby enabling the production test platform 100 to detect the output response of the dut 200 under different power input conditions. It will be appreciated that the control of the signal output of the signal source 60 by the computer 50 and the amount of power provided to the computer 50 by the RF power detection device 10 may or may not be related, depending on the needs of the application.

In practical use, the USB port of the computer 50 sends frequency point data to the RF power detection device 10, and then after the RF power detection device 10 detects the power value, the computer 50 reads the power value command to obtain the power value detected by the RF power detection device 10. It will be appreciated that since the RF power detection device 10 is not connected to the

couplers

20, 30 during calibration, the actual measured power value finally obtained by the computer 50 needs to be added to the coupling values of the

connected couplers

20, 30.

Compared with the prior art, the utility model discloses an adopt double-circuit RF wave detector 1, first RF interface 2, second RF interface 3, signal conditioning circuit 4, microcontroller 5, USB interface 7 and nonvolatile memory 8 to constitute RF power detection device 10 ingeniously, can replace the standard power meter that the conventionality adopted, can greatly reduced power measurement's cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and is not intended to limit the present invention. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention.

Claims

1. An RF power detection apparatus, comprising:

the system comprises a two-way RF detector, a first RF interface, a second RF interface, a signal adjusting circuit and a microcontroller; the first RF interface is connected with one input of the double-path RF detector, the second RF interface is connected with the other input of the double-path RF detector, and the signal adjusting circuit is connected with the two outputs of the double-path RF detector; and the microcontroller is connected with the output of the signal adjusting circuit.

2. The RF power detection apparatus of claim 1, wherein the dual RF detector is a dual RF detector or two simultaneous single RF detectors.

3. The RF power detection device of claim 1, wherein the dual RF detector is an RMS detector.

4. The RF power detection device of claim 1, wherein the dual RF detector is a logarithmic detector.

5. The RF power detection apparatus of claim 1, wherein the signal conditioning circuit comprises an operational amplifier.

6. The RF power detection device of claim 1, wherein the microcontroller has an analog-to-digital converter built therein.

7. The RF power detection arrangement according to any one of claims 1 to 6, wherein the microcontroller comprises a UART-USB converter connected to its UART port, the UART-USB converter being connected to the USB interface.

8. The RF power detection device of any one of claims 1-6, further comprising a non-volatile memory coupled to the microcontroller.

9. The RF power detection device of any one of claims 1-6, further comprising a power supply coupled to other circuit devices within the detection device.

10. A production test platform for radio frequency products, comprising the RF power detection device of any one of claims 1 to 9, a first coupler, a second coupler, and a computer; the RF power detection device is connected with the first coupler through a first RF interface, connected with the second coupler through a second RF interface and connected with the computer through a USB interface of the microcontroller.