Podcast
Questions and Answers
What is the primary function of an antenna?
What is the primary function of an antenna?
- To filter out unwanted signals
- To generate new signals
- To amplify signals
- To convert electrical signals into electromagnetic signals or vice versa (correct)
Which of the following statements about antenna size is correct?
Which of the following statements about antenna size is correct?
- Antenna size is inversely proportional to the frequency (correct)
- Antenna size is directly proportional to the frequency
- Antenna size is independent of the frequency
- Antenna size is determined by the power of the signal
What is the Half Power Beamwidth (HPBW) of an antenna with a field pattern given by $E(\theta) = \cos^2(\theta)$ for $0^\circ \leq \theta \leq 90^\circ$?
What is the Half Power Beamwidth (HPBW) of an antenna with a field pattern given by $E(\theta) = \cos^2(\theta)$ for $0^\circ \leq \theta \leq 90^\circ$?
- 65.72° (correct)
- 32.85°
- 180°
- 90°
Which of the following statements about antennas is true?
Which of the following statements about antennas is true?
Which of the following is not a step in the solution to determine the HPBW of the antenna with field pattern $E(\theta) = \cos^2(\theta)$?
Which of the following is not a step in the solution to determine the HPBW of the antenna with field pattern $E(\theta) = \cos^2(\theta)$?
What is the power at half power beamwidth as per the given information?
What is the power at half power beamwidth as per the given information?
What is the angle (in degrees) approximately at which the first null beamwidth occurs?
What is the angle (in degrees) approximately at which the first null beamwidth occurs?
In terms of radiation pattern, how do shapes of Microstrip patch elements differ?
In terms of radiation pattern, how do shapes of Microstrip patch elements differ?
Why are Microstrip antennas considered easy to install according to the text?
Why are Microstrip antennas considered easy to install according to the text?
What is a key characteristic of Microstrip antennas mentioned in the text?
What is a key characteristic of Microstrip antennas mentioned in the text?
What is a limitation of Microstrip Line Feed as mentioned in the text?
What is a limitation of Microstrip Line Feed as mentioned in the text?
What is the advantage of a coaxial probe feed for microstrip antennas?
What is the advantage of a coaxial probe feed for microstrip antennas?
Which feed type is described as having the most difficult fabrication process?
Which feed type is described as having the most difficult fabrication process?
Which of the following is NOT listed as an advantage of microstrip antennas?
Which of the following is NOT listed as an advantage of microstrip antennas?
What is the cause of the fringing effect in microstrip antennas?
What is the cause of the fringing effect in microstrip antennas?
In the given example, what is the value of the dielectric constant of the substrate material?
In the given example, what is the value of the dielectric constant of the substrate material?
What is the height of the substrate used in the given example?
What is the height of the substrate used in the given example?
What does the field pattern 𝐸(𝜃) = 𝑐𝑜𝑠(𝜃)cos (2𝜃) represent?
What does the field pattern 𝐸(𝜃) = 𝑐𝑜𝑠(𝜃)cos (2𝜃) represent?
How is Half Power Beamwidth (HPBW) calculated?
How is Half Power Beamwidth (HPBW) calculated?
What is the First Null Beamwidth (FNBW) for an antenna with 𝑈(𝜃) = cos²(𝜃) cos²(3𝜃)?
What is the First Null Beamwidth (FNBW) for an antenna with 𝑈(𝜃) = cos²(𝜃) cos²(3𝜃)?
In the context of the text, what does 'cos−1( 0)' represent?
In the context of the text, what does 'cos−1( 0)' represent?
Why is it mentioned 'trial and error method' in the solution?
Why is it mentioned 'trial and error method' in the solution?
What is one key similarity between determining HPBW and FNBW?
What is one key similarity between determining HPBW and FNBW?
What is the formula for calculating the width (W) in the given context?
What is the formula for calculating the width (W) in the given context?
In the provided solution, what does '𝜖𝑟' represent?
In the provided solution, what does '𝜖𝑟' represent?
How is the effective dielectric constant ('𝜖𝑟𝑒𝑓𝑓') calculated in the given scenario?
How is the effective dielectric constant ('𝜖𝑟𝑒𝑓𝑓') calculated in the given scenario?
What does 'Δ𝐿' stand for in the context of the solution provided?
What does 'Δ𝐿' stand for in the context of the solution provided?
Why is the effective dielectric constant ('𝜖𝑟𝑒𝑓𝑓') somewhat less than the substrate's dielectric constant?
Why is the effective dielectric constant ('𝜖𝑟𝑒𝑓𝑓') somewhat less than the substrate's dielectric constant?
How is the final value for 'L' calculated in the given scenario?
How is the final value for 'L' calculated in the given scenario?
