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What is antenna phased array?
In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio waves that can be electronically steered to point in different directions without moving the antennas.
What is the array factor of the N element antenna array?
The array factor for an N element linear array of equal amplitude is given by Equation 17.14. This is similar to the pattern of a line source aperture, Equation 17.5, and it is possible to synthesise an aperture with a planar array.
How does a phased antenna work?
A phased array antenna enables beamforming by adjusting the phase difference between the driving signal sent to each emitter in the array. This allows the radiation pattern to be controlled and directed to a target without requiring any physical movement of the antenna.
Why is antenna array needed?
An antenna array is used to increase overall gain, provide diversity reception, cancel out interference, maneuver the array in a particular direction, gage the direction of arrival of incoming signals, and to maximize the Signal to Interference plus Noise Ratio (SINR). …
What is phased array technology?
Phased array technology may also be known as phased array ultrasonic. The ultrasonic beams are controlled through computer based software programs in the phased array (PA) technology that control the acoustic characteristics such as the refracted angle, focal distance and aperture without moving the probe.
What is a broadside phased array?
The broadside array is defined as “the radiation pattern’s direction is perpendicular or broadside to the array axis”. It uses the dipole elements that are fed in phase and separated by the one-half wave length. A broadside array is a type of antenna array which is used to radiate the energy in specific direction to make better transmission.
What is an endfire array antenna?
An end-fire array is an array that gives a radiation pattern whose main beam is along the axis of the array . In a wider sense, the end-fire array is a linear or planar antenna whose direction of maximum radiation is along the line or in the plane of the array.
What is linear array antenna?
When arrays are arranged in straight lines, it is called a linear array, while antennas arranged in parallel lines on one plane have plane arrays in two dimensions.