Design Examples

In a 50 system, the characteristics of a microwave transistor measured at 1.3 GHz is shown as the following.

Design a high-frequency amplifier with microstrips. The PCB material has an , thickness h=1 mm. The velocity factor is . The microstrip geometry is w/h=0.94 for a 50 line. At a frequency of 1.3 GHz, the guided wavelength is mm.

The transistor is unconditionally stable.

 
• Quasi-unilateral design
  • Matching using short-circuit stub
  • Matching with open-circuit stub
• Bilateral design with unconditionally stable device
  • Maximum gain
  • Minimum noise
• Potentially unstable device