Let's go through each option:

a. The fractional antenna bandwidth is defined in dBi: This is incorrect. The fractional bandwidth of an antenna is usually defined as the ratio of the bandwidth to the center frequency, and it is not measured in dBi.

b. When gain is measured with a dipole antenna the gain in dB is expressed in dBi: This is correct. When the gain of an antenna is measured relative to a dipole antenna, it is expressed in dBi, which stands for decibels relative to isotropic.

c. The absolute gain in dBi is measured with two identical antennas The fractional antenna bandwidth is defined in dBi: This statement is a bit confusing, but the absolute gain of an antenna is indeed measured in dBi. However, the fractional bandwidth is not defined in dBi.

d. Gain is the maximum directive gain of an antenna: This is correct. The gain of an antenna is a measure of its ability to direct the radio waves in a particular direction. The maximum directive gain is the highest gain that can be achieved in the most favorable direction.

e. The resonant length of a fundamental mode rectangular patch antenna is lambda: This is correct. The resonant length of a rectangular patch antenna in its fundamental mode is approximately equal to half the wavelength (lambda) of the frequency it is designed to operate at.

Therefore, the correct answers are b, d, and e.

Question

Let's go through each option:

a. The fractional antenna bandwidth is defined in dBi: This is incorrect. The fractional bandwidth of an antenna is usually defined as the ratio of the bandwidth to the center frequency, and it is not measured in dBi.

b. When gain is measured with a dipole antenna the gain in dB is expressed in dBi: This is correct. When the gain of an antenna is measured relative to a dipole antenna, it is expressed in dBi, which stands for decibels relative to isotropic.

c. The absolute gain in dBi is measured with two identical antennas The fractional antenna bandwidth is defined in dBi: This statement is a bit confusing, but the absolute gain of an antenna is indeed measured in dBi. However, the fractional bandwidth is not defined in dBi.

d. Gain is the maximum directive gain of an antenna: This is correct. The gain of an antenna is a measure of its ability to direct the radio waves in a particular direction. The maximum directive gain is the highest gain that can be achieved in the most favorable direction.

e. The resonant length of a fundamental mode rectangular patch antenna is lambda: This is correct. The resonant length of a rectangular patch antenna in its fundamental mode is approximately equal to half the wavelength (lambda) of the frequency it is designed to operate at.

Therefore, the correct answers are b, d, and e.

Knowee AI · Accepted Answer

Let's go through each option:

a. The fractional antenna bandwidth is defined in dBi: This is incorrect. The fractional bandwidth of an antenna is usually defined as the ratio of the bandwidth to the center frequency, and it is not measured in dBi.

b. When gain is measured with a dipole antenna the gain in dB is expressed in dBi: This is correct. When the gain of an antenna is measured relative to a dipole antenna, it is expressed in dBi, which stands for decibels relative to isotropic.

c. The absolute gain in dBi is measured with two identical antennas The fractional antenna bandwidth is defined in dBi: This statement is a bit confusing, but the absolute gain of an antenna is indeed measured in dBi. However, the fractional bandwidth is not defined in dBi.

d. Gain is the maximum directive gain of an antenna: This is correct. The gain of an antenna is a measure of its ability to direct the radio waves in a particular direction. The maximum directive gain is the highest gain that can be achieved in the most favorable direction.

e. The resonant length of a fundamental mode rectangular patch antenna is lambda: This is correct. The resonant length of a rectangular patch antenna in its fundamental mode is approximately equal to half the wavelength (lambda) of the frequency it is designed to operate at.

Therefore, the correct answers are b, d, and e.

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