What is array factor of antenna array?

The array factor consists of orientation and separation information of point sources while the element factor gives the radiation characteristic of given antenna element. The antenna radiation pattern can be calculated by multiplying the array factor with the element factor of given antenna [1].

How is antenna directivity calculated?

Antenna Directivity D = maximum radiation intensity of a test antenna / average radiation intensity of test antenna. Therefore D= 4 π(maximum radiation intensity)/total radiation power.

What is array directivity?

Directivity (dBi) For a receiving element or array, directivity measures the sensitivity toward radiation arriving from a specific direction. The principle of reciprocity shows that the directivity of an element or array used for reception equals the directivity of the same element or array used for transmission.

What is K in array factor?

where k is the wave vector of the incident wave. The above equation can be factor simply as: The quantity AF is the Array Factor. The Array Factor is a function of the positions of the antennas in the array and the weights used.

What is mean by array factor explain the significance of array factor?

The array factor is the complex-valued far-field radiation pattern obtained for an array of isotropic radiators located at coordinates , as determined by: where are the complex-valued excitation coefficients, and is the direction unit vector.

What is directivity dB?

Directivity is the measure of the concentration of an antennas’s radiation pattern in a particular direction. Directivity is expressed in dB. The higher the directivity, the more concentrated or focussed is the beam radiated by an antenna. A higher directivity also means that the beam will travel further.

What is the value of efficiency factor of antenna?

An ideal antenna has 100% antenna efficiency i.e., it transmits all the power fed to it. But in the real world, a good antenna radiates only 50 to 60% of power supplied to it.

What is meant by directivity of antenna?

Directivity of an antenna is defined as the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions. The average radiation intensity is equal to the total power radiated by the antenna divided by 4π.

What is antenna factor dB M?

Antenna Factor (or correction factor) is defined as the ratio of the incident Electromagnetic Field to the output voltage from the antenna and the output connector. Gain (dBi) The ratio of the signal received or transmitted by a given antenna as compared to an isotropic or dipole antenna.

What is unit for antenna directivity?

Directivity is expressed in dB. The higher the directivity, the more concentrated or focussed is the beam radiated by an antenna. A higher directivity also means that the beam will travel further.

What is RF directivity?

Editorial Team – everything RF The Directivity in a coupler is the ratio between the input signal at the coupled port and the unwanted reflected signal at the coupled port. It is a measure of how well the coupler isolates two opposite-traveling (forward and reverse) signals at the coupled port.

What is the relation between directivity D gain G and efficiency E?

Relation between gain and efficiency is G = e x D where D is the directivity and E if the efficiency Antenna efficiency is how much RF power delivered to the antenna (from radio) is actually transmitted into the air.

What is antenna correction factor?

Definitions: Antenna Factor (or correction factor) is defined as the ratio of the incident Electromagnetic Field to the output voltage from the antenna and the output connector. Gain (dBi) The ratio of the signal received or transmitted by a given antenna as compared to an isotropic or dipole antenna.

What is binomial array in antenna?

Abstract. A binomial array is a non-uniform antenna array for which the elements are equally spaced with unequal amplitude excitation using a specified current excitation known as binomial excitation.