MicrowaveMeasurements

MicrowaveMeasurements - MMIC Design and Development USC...

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Microwave Measurements MMIC Design and Development USC
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Microwave Measurements Types of Measurements Swept Frequency Power, Gain, Match Noise Figure Single Frequency Amplitude and PhaseLinearity DC Input power and efficiency
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Microwave Measurements Power Standard unit of Power is Watt milliwatt is 10 -3 Watt dB scale is used to compress the scale when working over a wide range of power level Power in dBW = 10log 10 (Power in watts) Power in dBm = 10log 10 (Power in milliwatts)
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Microwave Measurements Gain or Loss Pin Pout Gain = Pout / Pin Or Gain (dB) = Pout(dB) – Pin(dB) Amplifier Pin Pout Lossy Element Gain = Pout / Pin < 1 Or Gain (dB) = Pout(dB) – Pin(dB) < 0
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Microwave Measurements Cascaded Elements Pin Pout G1 G2 G3 G4 G5 Pout = Pin*G1*G2*G3*G4*G5 In natural units Pout = Pin+G1+G2+G3+G4+G5 In dB
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Microwave Measurements 7 8 9 10 11 12 13 14 Frequency (GHz) Frequency Response 0 5 15 20 Gain (dB) 0 2 4 6 8 Noise Figure (dB) Gain (L) Noise Figure (R) Specified and Measured in an operating frequency band
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MicrowaveMeasurements - MMIC Design and Development USC...

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