Podcast
Questions and Answers
What is a primary purpose of a link budget in wireless communications systems?
What is a primary purpose of a link budget in wireless communications systems?
Which component is NOT explicitly listed as part of the TMYTEK 5G mmWave Developer Kit for measurement in the lab?
Which component is NOT explicitly listed as part of the TMYTEK 5G mmWave Developer Kit for measurement in the lab?
Why is it beneficial to measure the gains or losses associated with components in a wireless communication system?
Why is it beneficial to measure the gains or losses associated with components in a wireless communication system?
What component would you measure the gain or loss from during lab T1?
What component would you measure the gain or loss from during lab T1?
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What could a designer use the link budget to predict if a component fails?
What could a designer use the link budget to predict if a component fails?
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What does measuring the gains or losses in a wireless communications system allow designers to do?
What does measuring the gains or losses in a wireless communications system allow designers to do?
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During lab exercises, which combination of components would likely be evaluated for their effects on the link budget?
During lab exercises, which combination of components would likely be evaluated for their effects on the link budget?
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What role do power splitters play in the context of the lab assignment?
What role do power splitters play in the context of the lab assignment?
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What is one method for changing the phase difference between two signals with the same amplitude and phase?
What is one method for changing the phase difference between two signals with the same amplitude and phase?
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What is the primary purpose of phase calibration in the lab?
What is the primary purpose of phase calibration in the lab?
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Which aspect makes bench tests more reliable than over-the-air tests?
Which aspect makes bench tests more reliable than over-the-air tests?
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What is typically a drawback of conducting tests over the air compared to on the bench?
What is typically a drawback of conducting tests over the air compared to on the bench?
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Which device is involved in introducing discrete phase shifts in response to digital control signals?
Which device is involved in introducing discrete phase shifts in response to digital control signals?
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Why are most wireless communication system tests performed on the bench?
Why are most wireless communication system tests performed on the bench?
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What is a common purpose of inserting both digital and analog phase shifters?
What is a common purpose of inserting both digital and analog phase shifters?
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What is a key feature of the TMYTEK antenna test fixture mentioned in T5?
What is a key feature of the TMYTEK antenna test fixture mentioned in T5?
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What is one reason to measure the losses or gains in a wireless communications system component?
What is one reason to measure the losses or gains in a wireless communications system component?
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What does EIRP stand for?
What does EIRP stand for?
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What can happen if loss or gain values are inaccurately reported?
What can happen if loss or gain values are inaccurately reported?
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What does the link margin indicate in a wireless communication system?
What does the link margin indicate in a wireless communication system?
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What range of losses is typical for an RF connector at 28 GHz?
What range of losses is typical for an RF connector at 28 GHz?
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What is receiver sensitivity?
What is receiver sensitivity?
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What is the typical loss introduced by a short piece of coaxial cable at 28 GHz?
What is the typical loss introduced by a short piece of coaxial cable at 28 GHz?
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What might the 'fade margin' refer to in a wireless communication context?
What might the 'fade margin' refer to in a wireless communication context?
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Why must high-gain antennas be automatically steered in mobile communications?
Why must high-gain antennas be automatically steered in mobile communications?
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What principle do phased arrays utilize to create different antenna patterns?
What principle do phased arrays utilize to create different antenna patterns?
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What is a major disadvantage of measuring an antenna pattern at regular intervals?
What is a major disadvantage of measuring an antenna pattern at regular intervals?
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What is a compact and less expensive alternative to mechanical beam steering?
What is a compact and less expensive alternative to mechanical beam steering?
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Which of the following factors is crucial for phased arrays to function correctly?
Which of the following factors is crucial for phased arrays to function correctly?
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What happens if antenna pattern measurements are taken at wider angular intervals?
What happens if antenna pattern measurements are taken at wider angular intervals?
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Which of the following best describes the effect of wavelength (
$\lambda$
) in millimetre-wave bands on antenna design?
Which of the following best describes the effect of wavelength ( $\lambda$ ) in millimetre-wave bands on antenna design?
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What is a potential improvement over traditional angle interval measurement methods?
What is a potential improvement over traditional angle interval measurement methods?
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Study Notes
Lab Fundamentals - Antenna Arrays
- Students completed two lab sets using Keysight and TMY Technologies for RF/microwave and 5G mmWave phased array measurements.
- Lab memos demonstrate lab completion and results.
- Lab quizzes assess student understanding of specific knowledge.
- A question bank is provided for TMYTEK lab review.
Lab T1 - What is the Link Budget?
- Objectives include understanding practical gain/loss measurements in systems.
- Conduct experiments to characterize components of the TMYTEK 5G mmWave Developer Kit (PLO + Attenuator, Cable#1, Cable#2).
Lab T2 - What is the Channel Gain?
- Objectives include familiarization with techniques for adjusting gains and measuring the gain differences between RF channels.
- Conduct experiments to determine the gain difference between channel pairs.
Lab T3 - Constructive/Destructive Interference in Conduction
- Students learn how to adjust and measure RF channel phases.
- Determine signal cancellation between different channel pairs.
- Conduct experiments for phase step comparison and plot results.
Lab T4 - Constructive/Destructive Interference in Radiation
- Redo Lab T3 using an OTA (over-the-air) link.
- Compare results of over-the-air testing to bench-top results.
- Explore why most communication systems test in a controlled environment vs. in open air .
Lab T5 - How is the Beam Steered?
- Students learn about the TMYTEK test fixture with swing arm, ruler, and protractor.
- Learn to set the phase step of channels for antenna array beam steering.
Lab T6 - How is the Beam Pattern Measured?
- Students use the TMYTEK antenna test fixture.
- Learn to measure the pattern of the mmWave antenna array.
- Avoid using large steps to measure the antenna pattern.
- Explore adaptive sampling techniques when measuring an antenna pattern.
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Description
This quiz covers the key concepts and experiments related to antenna arrays and RF/microwave measurements through lab sets using Keysight and TMY Technologies. Students will explore various topics such as link budgets, channel gains, and interference phenomena. Successful completion of lab memos and quizzes will demonstrate understanding of these advanced topics in the context of 5G technologies.
