What is Array?

Why Use Array?

How Array Works?

Array

       All seats in this Classroom

      Eyes & Ears of each person

One Eye could

only see

 Plane World.

Are the top

ears better

than the

below ones?

       Eyes of Insects

        Higher Resolution but

        Shorter Sight Range

        3 Feet (0.9m) wide to

        reach  Human

         Sight Range

       Radar Antenna

                   SKA (Square Kilometer Array)

               Fund by US NSF (National Science Fundation)

                Massive new radio telescope

            Would cost in the area of $1 billion

            Cornell University-led U.S. consortium of 10 universities

            100 times the sensitivity of today's best radio telescopes,

.          Seven national consortia from around the world are

            competing for the winning design and the site,

            which are not likely to be chosen until about 2008.

                   More details see http://www.usska.org/main.html.

          ALMA (Atacama Large Millimetre Array) Radio Telescope

            Develped by Univerosty of Calgary in Canada.

                More Capable than any other astronomical instruments.

            Support Computer, Correlator, running at 16,000

            million-million operations per second

       Sonar

             Globe Speaker  &  Line Hodrophone Array

             Cylindrical Transducer Array 

 

 

                BM 2000 - Multi Function Console by ATLAS ELEKTRONIK

           Full  functions: Detection, Intercept, Ranging and Classification.

                

 

 

  

 

 

 

 

 

  

 

 

 

 

 

  

 

 

 

 

 

  

 

 

 

 

  

 

 

 

 

Why Array?

 

Brighter       Clearer       Farther

 

 

 

      Mission Gets More Complicated

 

                 Frequency, Magnitude, Phase & PSD are often

              Not Enough /Not Good Enough

 

              Number of Sources

              DOA - Direction of Arrival

                                          

              High Speed & Quality, High Capacity, Wideband

              Wireless Access

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

How it works?

 

       Submarine

                

 

 

       Fishing

                

 

 

 

 

 

The mth sensor output
Correlation of all M outputs
Beamformer estimator

 

      Array Geometry

 

              

                 

             2-Dimensional Beam Pattern of three array above.