Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > Which of the following is NOT true with respe...
Start Learning for Free
Which of the following is NOT true with respect to antennas?
- a)Lower frequencies are radiated near the end of transmission line
- b)Horn antennas are used to feed parabolic dish antennas
- c)Yagi-Uda antennas have high bandwidth and low gain
- d)Higher frequencies are radiated near the feedpoint
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of the following is NOT true with respect to antennas?a)Lower fr...
Yagi-Uda Antenna:
- It is a directional antenna and it consists of multiple parallel half-wave dipole elements.
- It is a directional antenna and it consists of multiple parallel half-wave dipole elements.
- The direction of maximum radiation is along the axis of the dipole array which is called an end-fire radiation pattern.
- The reflector and director are both parasitic types.
Characteristics:
- Usually, Yagi-Uda antenna arrays have low input impedance.
- It has a high gain.
- It has relatively low bandwidth.
- The length of the director is less than λ/2
- The length of the reflector is greater than λ/2.
- Its radiation pattern is almost uni-directional.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following is NOT true with respect to antennas?a)Lower fr...
Introduction:
Antennas are devices used for transmitting and receiving electromagnetic waves. They are an essential component of communication systems and are used to radiate electromagnetic energy into the surrounding space or to receive electromagnetic signals. In this question, we need to identify the statement that is NOT true with respect to antennas.
Explanation:
Let's analyze each option and determine its validity.
a) Lower frequencies are radiated near the end of the transmission line:
This statement is generally true. At lower frequencies, the wavelength is larger, and antennas that are electrically small compared to the wavelength tend to radiate more efficiently when placed at the end of the transmission line. Therefore, lower frequencies are often radiated near the end of the transmission line.
b) Horn antennas are used to feed parabolic dish antennas:
This statement is true. Horn antennas are often used as feed antennas for parabolic dish antennas. They are designed to have a wide radiation pattern and direct the electromagnetic energy towards the parabolic dish, which further focuses the energy in a specific direction.
c) Yagi-Uda antennas have high bandwidth and low gain:
This statement is NOT true. Yagi-Uda antennas have a relatively narrow bandwidth, which means they are designed to operate effectively over a specific frequency range. However, they are known for their high gain, which refers to the ability of an antenna to focus the radiated energy in a specific direction.
d) Higher frequencies are radiated near the feedpoint:
This statement is generally true. At higher frequencies, the wavelength is smaller, and antennas that are electrically small compared to the wavelength tend to radiate more efficiently when placed near the feedpoint. Therefore, higher frequencies are often radiated near the feedpoint.
Conclusion:
Based on the analysis, option 'c' is the statement that is NOT true with respect to antennas. Yagi-Uda antennas have high gain and a relatively narrow bandwidth, contrary to the statement provided.
Antennas are devices used for transmitting and receiving electromagnetic waves. They are an essential component of communication systems and are used to radiate electromagnetic energy into the surrounding space or to receive electromagnetic signals. In this question, we need to identify the statement that is NOT true with respect to antennas.
Explanation:
Let's analyze each option and determine its validity.
a) Lower frequencies are radiated near the end of the transmission line:
This statement is generally true. At lower frequencies, the wavelength is larger, and antennas that are electrically small compared to the wavelength tend to radiate more efficiently when placed at the end of the transmission line. Therefore, lower frequencies are often radiated near the end of the transmission line.
b) Horn antennas are used to feed parabolic dish antennas:
This statement is true. Horn antennas are often used as feed antennas for parabolic dish antennas. They are designed to have a wide radiation pattern and direct the electromagnetic energy towards the parabolic dish, which further focuses the energy in a specific direction.
c) Yagi-Uda antennas have high bandwidth and low gain:
This statement is NOT true. Yagi-Uda antennas have a relatively narrow bandwidth, which means they are designed to operate effectively over a specific frequency range. However, they are known for their high gain, which refers to the ability of an antenna to focus the radiated energy in a specific direction.
d) Higher frequencies are radiated near the feedpoint:
This statement is generally true. At higher frequencies, the wavelength is smaller, and antennas that are electrically small compared to the wavelength tend to radiate more efficiently when placed near the feedpoint. Therefore, higher frequencies are often radiated near the feedpoint.
Conclusion:
Based on the analysis, option 'c' is the statement that is NOT true with respect to antennas. Yagi-Uda antennas have high gain and a relatively narrow bandwidth, contrary to the statement provided.
Attention Electronics and Communication Engineering (ECE) Students!
To make sure you are not studying endlessly, EduRev has designed Electronics and Communication Engineering (ECE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electronics and Communication Engineering (ECE).
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Top Courses for Electronics and Communication Engineering (ECE)View all
Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer?
Question Description
Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer?.
Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is NOT true with respect to antennas?a)Lower frequencies are radiated near the end of transmission lineb)Horn antennas are used to feed parabolic dish antennasc)Yagi-Uda antennas have high bandwidth and low gaind)Higher frequencies are radiated near the feedpointCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup