Question 12.9: DESIGN OF A CLASS A POWER AMPLIFIER Design a power amplifier...
DESIGN OF A CLASS A POWER AMPLIFIER
Design a power amplifier at 2.3 GHz using a Nitronex NPT25100 GaN HEMT transistor, with an output power of 10 W. The scattering parameters of the transistor for V_{DS} = 28 V and I_D = 600 mA are as follows: S_{11} = 0.593∠178°, S_{12} =0.009∠−127°, S_{21} = 1.77∠−106°, and S_{22} = 0.958∠175°, and the optimum large-signal source and load impedances are Z_{SP} = 10 − j3 Ω and Z_{L P} = 2.5 −j2.3 Ω. For an output power of 10 W, the power gain is 16.4 dB and the drain efficiency is 26%. Design input and output impedance matching sections for the transistor, and find the required input power, the required DC drain current, and the power added efficiency.
The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.
The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.
Learn more on how we answer questions.
Related Answered Questions
Question: 12.5
Verified Answer:
We first calculate that K = 2.78 and Δ = 0.37, so ...
Question: 12.4
Verified Answer:
Since S_{12} = 0 and |S_{11}...
Question: 12.7
Verified Answer:
The amplifier of Example 12.4 was designed for a g...
Question: 12.8
Verified Answer:
We use (12.71) and (12.74) to evaluate the attenua...
Question: 12.3
Verified Answer:
In practice, scattering parameters are usually pro...
Question: 12.6
Verified Answer:
From (12.62), matching the input resistance to [la...
Question: 12.2
Verified Answer:
From (12.28) and (12.29) we compute K and |Δ| as
[...
Question: 12.1
Verified Answer:
From (12.1a) and (12.1b) the reflection coefficien...