阅读说明：本技术 一种射频器件的时域特性评估方法及其评估装置 (Time domain characteristic evaluation method and evaluation device of radio frequency device ) 是由 陈利欢 王颖 寿晓栋 于 2018-06-11 设计创作，主要内容包括：本发明公开了一种射频器件的时域特性评估装置,包括被测物、波形发生器、信号发生器和信号分析器,波形发生器连接被测物,波形发生器用于提供控制信号；信号发生器连接被测物,信号发生器用于提供射频输入信号；信号分析器连接被测物,信号分析器用于显示被测物的射频输出信号。本发明还提供了一种射频器件的时域特性评估方法,包括设置时域特性评估装置的初始状态；当信号分析器接收到控制信号时,信号分析器捕获射频输出信号从底噪到满功率的包络跳变。本发明的技术方案可以用于评估射频前端器件在进行收/发状态的切换时射频性能是否满足标定的要求,高效率且直观地测量射频器件在进行时序切换时的射频性能。(The invention discloses a time domain characteristic evaluation device of a radio frequency device, which comprises a measured object, a waveform generator, a signal generator and a signal analyzer, wherein the waveform generator is connected with the measured object and is used for providing a control signal; the signal generator is connected with an object to be detected and used for providing a radio frequency input signal; the signal analyzer is connected with the object to be measured and is used for displaying the radio frequency output signal of the object to be measured. The invention also provides a time domain characteristic evaluation method of the radio frequency device, which comprises the steps of setting the initial state of the time domain characteristic evaluation device; when the signal analyzer receives the control signal, the signal analyzer captures the envelope jump of the radio frequency output signal from the bottom noise to the full power. The technical scheme of the invention can be used for evaluating whether the radio frequency performance of the radio frequency front-end device meets the calibration requirement when the receiving/transmitting state is switched, and efficiently and intuitively measuring the radio frequency performance of the radio frequency device when the time sequence is switched.)

1. The time domain characteristic evaluation device of the radio frequency device is characterized by comprising a measured object, a waveform generator, a signal generator and a signal analyzer, wherein the waveform generator is connected with the measured object and is used for providing a control signal; the signal generator is connected with the object to be measured and used for providing a radio frequency input signal; the signal analyzer is connected with the object to be measured and is used for displaying the radio frequency output signal of the object to be measured.

2. the time domain characteristic evaluation apparatus for a radio frequency device according to claim 1, wherein the object to be measured is at an element level or a board level.

3. The time domain characteristic evaluation apparatus of a radio frequency device according to claim 1, wherein the radio frequency input signal is a continuous wave signal.

4. The apparatus for evaluating the temporal characteristics of a radio frequency device according to claim 1, wherein the control signal is a square wave having a duty cycle of 50%.

5. the apparatus for evaluating temporal characteristics of a radio frequency device according to claim 1, wherein the signal analyzer is a spectrometer.

6. A time domain characteristic evaluation method of a radio frequency device is characterized by comprising the following steps:

step 1, providing a time domain characteristic evaluation device according to any one of claims 1 to 5;

Step 2, setting the initial state of the time domain characteristic evaluation device;

and 3, when the signal analyzer receives the control signal, the signal analyzer captures the envelope jump of the radio frequency output signal from the bottom noise to the full power.

7. The method for evaluating the time domain characteristics of a radio frequency device according to claim 6, wherein the step 2 further comprises the steps of:

Step 2.1, setting the waveform generator;

step 2.2, setting the signal generator;

And 2.3, setting the signal analyzer.

8. The method for evaluating the time domain characteristics of a radio frequency device according to claim 7, wherein in step 2.1, the waveform generator emits a square wave signal for simulating the transmission/reception control signal to the object to be measured.

9. A method of time domain characterisation of a radio frequency device as claimed in claim 7 wherein in step 2.2 the signal generator emits a carrier signal which is not modulated.

10. The method for time domain characteristic assessment of a radio frequency device according to claim 7, wherein in step 2.3, the synchronization signal output of said waveform generator is used as a trigger input signal of said signal analyzer, and a center frequency point is set.

Technical Field

The invention relates to the technical field of radio frequency, in particular to a novel radio frequency device time domain characteristic evaluation method and a novel radio frequency device time domain characteristic evaluation device.

background

the existing wireless communication channel measuring platform mainly comprises a time domain measuring platform and a frequency domain measuring platform, and compared with the time domain measuring platform, the frequency domain measuring platform has the characteristics of large measuring bandwidth, high signal-to-noise ratio, easiness in construction of laboratory universal instruments and the like.

In product prototype verification or product mass production test, for example, a front-end module device in a wireless communication module, a power amplifier and a low noise amplifier are integrated inside, and the receiving/transmitting state is switched in actual operation. Control signals are given from the MCU to the front-end module devices to enter a specific mode, whose switching performance needs to be examined and verified. In the prior art, a high-speed oscilloscope is adopted to measure the corresponding relation between a control signal and an output signal in a time domain, and whether the switching characteristic of a radio frequency device meets the nominal time sequence requirement or not is judged by detecting the peak-to-peak value of the output radio frequency signal, for example, after the control signal is given, whether the radio frequency energy converted by the peak-to-peak value of the radio frequency signal output by a front-end module reaches 90% or 95% of a design value or not is checked.

disclosure of Invention

The invention aims to evaluate whether the time domain characteristic of the radio frequency device meets the design requirement when the receiving/transmitting state is switched in a low-cost mode.

The time domain characteristic evaluation device of the radio frequency device comprises a measured object, a waveform generator, a signal generator and a signal analyzer, wherein the waveform generator is connected with the measured object and is used for providing a control signal; the signal generator is connected with the object to be measured and used for providing a radio frequency input signal; the signal analyzer is connected with the object to be measured and is used for displaying the radio frequency output signal of the object to be measured.

Preferably, the object to be measured is at the element level or at the plate level.

Preferably, the radio frequency input signal is a continuous wave signal.

Preferably, the control signal is a square wave, and the duty cycle of the square wave is 50%.

preferably, the signal analyzer is a spectrometer.

The invention also provides a time domain characteristic evaluation method of the radio frequency device, which comprises the following steps:

step 1, providing a time domain characteristic evaluation device according to any one of claims 1 to 5;

Step 2, setting the initial state of the time domain characteristic evaluation device;

And 3, when the signal analyzer receives the control signal, the signal analyzer captures the envelope jump of the radio frequency output signal from the bottom noise to the full power.

Preferably, the step 2 further comprises the following steps:

Step 2.1, setting the waveform generator;

step 2.2, setting the signal generator;

and 2.3, setting the signal analyzer.

Preferably, in step 2.1, the waveform generator sends out a square wave signal, and the square wave signal is used for simulating a receiving/sending control signal to the object to be measured.

Preferably, in step 2.2, the signal generator sends out a carrier signal without modulation.

Preferably, in step 2.3, the synchronous signal output of the waveform generator is used as a trigger input signal of the signal analyzer, and a central frequency point is set.

according to the method for evaluating the time domain characteristics of the radio frequency device, the radio frequency switching performance of the device is verified on a frequency domain directly by adopting a frequency spectrograph, the envelope measurement result is visual and visible, the conversion from a peak value to radio frequency energy is not needed, the verification process is simplified, and the efficiency is improved.

Drawings

FIG. 1 is a system block diagram provided in the practice of the present invention;

Fig. 2 is a frequency domain plot of the rf output of the spectrometer of an embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

in a preferred embodiment of the present invention, the time domain characteristic evaluation method of the rf device according to the present invention uses a system composition as shown in fig. 1, which includes:

an arbitrary waveform generator Agilent 33250A, configured to generate a control signal for the radio frequency device, where, for example, when the control signal jumps from a low level to a high level, the radio frequency device enters a transmission mode from an idle state;

The signal generator SMBV200A or Keysight E4438C is used for outputting a radio frequency carrier to the input end of the device to be tested;

A frequency spectrograph: the method is used for observing the frequency domain characteristics of the output signals after the output signals pass through the device to be tested.

the time domain characteristic evaluation method of the radio frequency device comprises the following specific operation steps:

First, system initial state setup

1.1, setting of an arbitrary waveform generator:

Sending 500Hz square wave to simulate a receiving/sending control signal to a device to be tested, wherein the logic of the device is set to be 3.3V for high level; the low level is set to 0V and the duty cycle is 50%.

1.2, setting a signal source:

The signal source outputs a single tone signal, i.e., a carrier signal that has not been modulated.

1.3 setting of frequency spectrograph:

the frequency spectrograph adopts an external trigger mechanism, namely, the synchronous signal output of an arbitrary waveform generator is used as a trigger input signal of the frequency spectrograph; the central frequency points are set to be 2.585GHz, span 0Hz, RBW 8MHz and VBW 10MHz for example.

And secondly, the signal source output is turned on, and the spectrum analyzer captures the envelope jump of the radio frequency signal from the bottom noise to the full power after receiving the trigger signal.

As shown in fig. 2, the mark point 3 in the result displayed by the spectrometer represents the energy full power point; marker point 2 represents a state of 0.1dB power back-off (97.7% rf energy) and marker point 4 represents a state of 0.4dB power back-off (90% rf energy). Thus, the time from marker point 1 to marker point 4 represents the switching time of the radio frequency energy from 10% - > 90%.

By comparing the time with the identifier in the device specification, it is determined whether the timing sequence of the device meets the nominal requirement, for example, if the nominal 10% -90% of the specification is switched to be less than 3 microseconds but the actual measurement result is 5 microseconds, it can be determined that the timing sequence characteristic of the tested radio frequency device cannot meet the requirement of the specification.

Similarly, it is also possible to test whether the timing of the device from the active state to the idle state meets the requirements of the specification.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.