What is meant by Array gain?

Array gain is defined as the increase in SNR in MIMO systems compared with that of SISO systems. It is a result of coherent combining of multiple signals, either from multiple transmitters or from multiple receivers.

What is antenna synthesis?

Antenna synthesis is the reverse of analysis; an antenna structure is derived from a given set of performance characteristic specifications, usually including the radiation pattern.

What is Array gain and diversity gain?

The difference between array gain and diversity gain is that array gain gives an increase in the average SNR, while diversity gain makes the probability density function of the instantaneous SNR more concentrated around its average value.

What is an antenna array and its types?

An antenna array is a radiating system, which consists of individual radiators and elements. Each of this radiator, while functioning has its own induction field. The elements are placed so closely that each one lies in the neighbouring one’s induction field.

How do you calculate antenna gain from radiation pattern?

Antenna Gain is a parameter which measures the degree of directivity of the antenna’s radiation pattern….Then the specification of such antenna becomes as below:

1. Horizontal beam width = 90 Degree.
2. Vertical beam Width = 7 Degree.
3. Gain of antenna = 17.15 dBi.

What is an antenna array?

An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves.

How does gain affect an antenna?

Antenna gain is the ability of the antenna to radiate more or less in any direction compared to a theoretical antenna. If an antenna could be made as a perfect sphere, it would radiate equally in all directions.

What is the benefits of antenna array?

Arrays can be used to achieve higher gain, to give path diversity (also called MIMO) which increases communication reliability, to cancel interference from specific directions, to steer the radio beam electronically to point in different directions, and for radio direction finding (RDF).

What is antenna array synthesis?

The antenna array synthesis is an automated process of identification or optimization of a specific antenna array model, namely, a procedure for determining the dimensional parameters and the (amplitude and/or phase) excitation tapers across the array aperture and terminals that are useful to meet given performance requirements.

How can an antenna array be better understood?

An antenna array can be better understood by observing the following images. Observe how the antenna arrays are connected. An antenna array is a radiating system, which consists of individual radiators and elements. Each of this radiator, while functioning has its own induction field.

What is the gain of X shaped dipole antenna?

The X-shaped dipoles give it a wide bandwidth to cover both the VHF (174–216 MHz) and UHF (470–700 MHz) TV bands. It has a gain of 5 dB VHF and 12 dB UHF and an 18 dB front-to-back ratio.

What is antenna theory?

Antenna Theory – Antenna Arrays. An antenna, when individually can radiate an amount of energy, in a particular direction, resulting in better transmission, how it would be if few more elements are added it, to produce more efficient output. It is exactly this idea, which led to the invention of Antenna arrays.