Mixers

Mixers - MMIC Design and Technology Instructor Dr George...

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Letcture 9 Mixers MMIC Design and Technology Instructor Dr. George Kirkman
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Letcture 9 Mixers Frequency Translation ( 29 ( 29 ) cos( 2 1 ) cos( 2 1 ) cos( ) cos( t t t t LO RF LO RF LO RF ϖ + + - = ) cos( t RF ) cos( t LO ( 29 ( 29 ) cos( 2 1 ) cos( 2 1 t t LO RF LO RF + + -
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Letcture 9 Mixers Reality due to Nonlinearity dB IFoutput RFinput L C log 10 = Conversion loss Typically 4 – 7 dB
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Letcture 9 Mixers Mixer Design Again it is a matching exercise!
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Letcture 9 Mixers Example λ g is wavelength in the guide at the LO frequency Short circuit at 2 ϖ LO Short circuit at n ϖ LO N=1,3,5,… Short circuit at 2n ϖ LO N=1,3,5,… Single frequency circuit to terminate LO harmonics reactively
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Mixers - MMIC Design and Technology Instructor Dr George...

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