figs01

figs01 - F IGURES FOR C HAPTER 1 Figure 1-1 Block diagram...

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Unformatted text preview: F IGURES FOR C HAPTER 1 Figure 1-1 Block diagram of a generic RF system. PA PA DAC ADC LPF Mixer Switch Digital Circuitry Low-Pass Filter Receiver Power Amplifier Transmitter Power Amplifier Digital-to-Analog Converter Analog-to-Digital Converter Antenna OSC. Local Oscillator Analog Signal Circuits Mixed Signal Circuits Figure 1-2(a) Simplified circuit diagram of the first stage of a 2-GHz power amplifier for a cellular phone. + V B + V C RF in To the Second Stage RFC RFC BFG425W C B C B R C 1 C 2 C 3 C 4 100 pF 8.2 pF 100 pF 8.2 pF DC Blocking Capacitor Interstage Blocking Capacitor RF Blocking Networks Input Matching Network Interstage Matching Network Stability Resistor Figure 1-2(b) Printed circuit board layout of the power amplifier. BFG425 BFG21 RF in RF out Input Matching Network Interstage Matching Network Output Matching Network DC Bias Network First Stage Transistor Second Stage Transistor Dual Transistor IC 0.5 inch Figure 1-3 Electromagnetic wave propagation in free space. The electric and magnetic field is recorded at a fixed instance in time as a function of space ( , are unit vectors in x- and y-direction)....
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figs01 - F IGURES FOR C HAPTER 1 Figure 1-1 Block diagram...

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