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Rf Engineer Interview Questions

Interviews for RF engineering jobs are designed to be heavily technical as well as to inquire about your past experience in radio technology. Employers are looking for strong and intelligent team members to make their communication products stronger and more competitive and will be looking to hire confident individuals with a solid foundation in engineering skills. A bachelor's degree in electrical engineering is expected.

1,365 rf engineer interview questions shared by candidates

Q: how will we setup a lineup? What are disadvantages if we use Filter as first stage. Q: What is EVM? Q: Scenario: Assume TX side gives B1UL output and RX is receiving B1DL/B3DL and B7DL. What parameters will you investigate? Q: Why does a device has nonlinearity? Q:worst return loss possible? Q: how would you match two points in smith chart? Which one would you choose among 4 types matching? Answer: first I will ask what BW is needed? Q: why do we want our system to be linear? What is intermod? How much intermod will increase with 1 dB increase in Pin? Channel leakage Q: How will you model non-linearity. You don’t have any data. Where does it come from? Q: how will you find IIP3? Q: how will you find noise floor of Spectrum Analyzer? Q: why do we see saw tooth noise floor at very low noise floor in Spectrum Analyzer? Q: how does line impedance change if you make it wider? How ideal line impedance can be expressed in terms of lumped model? Q: How does the wave travel in microstrip line? Which gnd do we want closer to coplanar microstrip line – gnd below the trace or the gnd on the same plane? Q: how will constellation diagram change if we 1. increase gain in I component. 2. Introduce Phase noise.
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RF Hardware Design Engineer

Interviewed at Apple

4.1★
Oct 8, 2021

Q: how will we setup a lineup? What are disadvantages if we use Filter as first stage. Q: What is EVM? Q: Scenario: Assume TX side gives B1UL output and RX is receiving B1DL/B3DL and B7DL. What parameters will you investigate? Q: Why does a device has nonlinearity? Q:worst return loss possible? Q: how would you match two points in smith chart? Which one would you choose among 4 types matching? Answer: first I will ask what BW is needed? Q: why do we want our system to be linear? What is intermod? How much intermod will increase with 1 dB increase in Pin? Channel leakage Q: How will you model non-linearity. You don’t have any data. Where does it come from? Q: how will you find IIP3? Q: how will you find noise floor of Spectrum Analyzer? Q: why do we see saw tooth noise floor at very low noise floor in Spectrum Analyzer? Q: how does line impedance change if you make it wider? How ideal line impedance can be expressed in terms of lumped model? Q: How does the wave travel in microstrip line? Which gnd do we want closer to coplanar microstrip line – gnd below the trace or the gnd on the same plane? Q: how will constellation diagram change if we 1. increase gain in I component. 2. Introduce Phase noise.

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