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One of the following consists of a non-resonant antenna -
- a)the rhombic antenna
- b)the folded dipole antenna
- c)the end-fire array
- d)the broadside array
Correct answer is option 'A'. Can you explain this answer?
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One of the following consists of a non-resonant antenna -a)the rhombic...
Non-resonant Antennas:
- Non-resonant Antennas are those for which resonant frequency does not occur.
- The wave moves in the forward direction and hence does not form a standing wave.
- The radiation pattern of the radiated wave matches the load impedance in the non-resonant antennas.
- These non-resonant antennas are non-periodic in nature.
- Example: Yagi –Uda Antenna, Rhombic Antenna, Ground Antenna.
Resonant Antennas:
- When the voltage and current distribution form standing wave patterns, then such types of antennas are called standing wave antennas or resonant antennas.
- Resonant antennas exhibit a periodic nature.
- They have traveling waves propagating in forward and backward directions and are called bi-directional traveling-wave antennas.
- In resonant antennas, radiated waves traveling in opposite directions establish incident and reflected waves.
- Example: Loop Antenna, Half Wave Dipole Antenna
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One of the following consists of a non-resonant antenna -a)the rhombic...
Non-Resonant Antenna: Rhombic Antenna
The rhombic antenna is a type of non-resonant antenna. It is a wire antenna that is commonly used for long-distance communication. It consists of four wires arranged in the shape of a rhombus, with the feed point located at one corner.
Operating Principle:
The rhombic antenna operates based on the principle of reflection and refraction of radio waves. When a radio wave strikes the rhombic antenna, it is reflected and refracted by the wires of the antenna, causing it to be radiated in a specific direction.
Design and Structure:
The rhombic antenna consists of four wires that are typically several wavelengths long. These wires are arranged in the shape of a rhombus, with each side of the rhombus being a half-wavelength long. The feed point is located at one corner of the rhombus, and a transmission line is connected to it.
Directional Radiation Pattern:
The rhombic antenna has a highly directional radiation pattern. The direction of maximum radiation is perpendicular to the longest diagonal of the rhombus. This makes the rhombic antenna well-suited for long-distance communication, as it allows for focused transmission and reception of signals in a specific direction.
Non-Resonant Nature:
Unlike resonant antennas, which are designed to resonate at specific frequencies, the rhombic antenna is a non-resonant antenna. This means that it does not have a natural resonant frequency. Instead, the rhombic antenna is typically operated at a frequency that is a multiple of its physical length. This allows for a wide bandwidth of operation and makes the antenna versatile for different frequency ranges.
Advantages and Applications:
- The rhombic antenna has a high gain and directivity, which makes it suitable for long-distance communication.
- It can be used for both transmission and reception of signals.
- The non-resonant nature of the rhombic antenna allows for a wide bandwidth of operation.
- It is commonly used in point-to-point communication systems, such as HF (High Frequency) and shortwave radio.
- The rhombic antenna is also used in military applications for long-range communication.
In conclusion, the rhombic antenna is a non-resonant antenna that is commonly used for long-distance communication. Its unique design and non-resonant nature allow for a high gain and directionality, making it suitable for various applications.
The rhombic antenna is a type of non-resonant antenna. It is a wire antenna that is commonly used for long-distance communication. It consists of four wires arranged in the shape of a rhombus, with the feed point located at one corner.
Operating Principle:
The rhombic antenna operates based on the principle of reflection and refraction of radio waves. When a radio wave strikes the rhombic antenna, it is reflected and refracted by the wires of the antenna, causing it to be radiated in a specific direction.
Design and Structure:
The rhombic antenna consists of four wires that are typically several wavelengths long. These wires are arranged in the shape of a rhombus, with each side of the rhombus being a half-wavelength long. The feed point is located at one corner of the rhombus, and a transmission line is connected to it.
Directional Radiation Pattern:
The rhombic antenna has a highly directional radiation pattern. The direction of maximum radiation is perpendicular to the longest diagonal of the rhombus. This makes the rhombic antenna well-suited for long-distance communication, as it allows for focused transmission and reception of signals in a specific direction.
Non-Resonant Nature:
Unlike resonant antennas, which are designed to resonate at specific frequencies, the rhombic antenna is a non-resonant antenna. This means that it does not have a natural resonant frequency. Instead, the rhombic antenna is typically operated at a frequency that is a multiple of its physical length. This allows for a wide bandwidth of operation and makes the antenna versatile for different frequency ranges.
Advantages and Applications:
- The rhombic antenna has a high gain and directivity, which makes it suitable for long-distance communication.
- It can be used for both transmission and reception of signals.
- The non-resonant nature of the rhombic antenna allows for a wide bandwidth of operation.
- It is commonly used in point-to-point communication systems, such as HF (High Frequency) and shortwave radio.
- The rhombic antenna is also used in military applications for long-range communication.
In conclusion, the rhombic antenna is a non-resonant antenna that is commonly used for long-distance communication. Its unique design and non-resonant nature allow for a high gain and directionality, making it suitable for various applications.
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One of the following consists of a non-resonant antenna -a)the rhombic antennab)the folded dipole antennac)the end-fire arrayd)the broadside arrayCorrect answer is option 'A'. Can you explain this answer?
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