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1、APPLICATION NOTE How to Make D-band Noise Figure Measurement with Signal Analyzer 2 Table of Contents Introduction.3 Configuring Noise Figure Measurement System.8 Making Noise Figure Measurement.14 Conclusion.19 Related Literature and Additional Resources.20 3 Introduction In the early 6G research,n

2、ew sub-THz frequency bands have been explored especially the D-band(110-170 GHz)for early research prototyping and system performance validation.For those early prototype systems,Noise Figure as one fundamental RF parameter would always be required to measure and characterize the performance of the

3、whole system.Noise Figure is essential to verify new designs and demonstrate the device under test(DUT)meets specifications.A new Noise Figure measurement solution in D-band is introduced consisting of Keysight X-Series Signal Analyzer with N9069EM0E Noise Figure Measurement Application,VDI System D

4、ownconverter and Noise Source,and Keysight Microwave Signal Generator as Local Oscillator(LO).Figure 1.Noise figure measurement solution in D-band In the above D-band Noise Figure Measurement Solution,the DUT works in D-band with a frequency range from 110 GHz to 170 GHz.The Noise Source is used to

5、provide broadband noise into the DUT input with pre-calibrated Excess Noise Ratio(ENR)values.The System Downconverter is used to convert the input D-band frequency from the DUT output to a fixed IF frequency.The Signal Analyzer with N9069EM0E Noise Figure Measurement Application uses the Y-factor me

6、thod to calculate the noise figure of the DUT.The noise figure measurement system shown in Figure 1 can be seen as a two-stage system as illustrated in Figure 2.Stage 1 is DUT,and Stage 2 is Equivalent NF Instrument,that is,the system downconverter plus the signal analyzer shown in Figure 1.Figure 2