Transcription of ChapterII RF-CIRCUITS
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Class Notes, 31415 RF-Communication Circuits Chapter IIRF-CIRCUITSJens Vidkj rNB230 iiContentsII RF-CIRCUITS , Concepts and 1II-1 Parallel Resonance 2 Frequency 3 Poles and 6 Transient 8II-2 Series Resonance circuit 11II-3 Narrowband 14II-4 Series-to-Parallel 19 Example II-4-1 ( impedance matching ).. 20 Conversions in Narrowband 23 Conversions in Broadband 26 Example II-4-2 ( spiral inductor ).. 26II-5 Tuned 30 Synchronously Tuned 32 Example II-5-1 ( synchronous tuning ).. 33 Butterworth Stagger Tuned 36 Example II-5-2 ( Butterworth amplifier ).. 41II-6 Transformers and Transformerlike 45 Review of Mutual 45 Equivalent Circuits for Two Coupled 53 Example II-6-1 ( practical RF transformers ).. 55 Tuned 57 Example II-6-2 ( transformer-coupled tuned amplifier ).. 61 Example II-6-3 ( autotransformers in a tuned amplifier ).
useful methods in RF-designs, so they are considered in some details here. Finally, the very general method of constructing lumped element matching networks using a Smith chart is exemplified. Power matching is fundamental for designing and understanding many RF circuits.
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