Fundamentals of Array Antenna

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An array antenna is a very interesting concept to control antenna radiation patterns. By using properly designed array elements, we can design a high gain or beam steering antenna very easily.

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Antenna Engineering CHO, Yong Heui Fundamentals of Array Antenna

Array antenna 1. Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],

Microstrip patch antenna 1. Introduction Single patch antenna Linear array: series feeding Planar array: parallel feeding 

Conformal array antenna 1. Introduction Conformal array: microstrip patch and cavity (Alcatel) Spot beam of LEO satellite 

Two-element array 2. Array antenna ,[object Object],

Array factor 2. Array antenna ,[object Object],[object Object],

Active integrated antenna 3. Active antenna

Receiving module for active antenna 3. Active antenna

Self structuring antenna 3. Active antenna

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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. The individual antenna elements are connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific phase relationship. The radio waves radiated by each individual antenna combine and superpose, adding together (interfering constructively) to enhance the power radiated in desired directions, and cancelling (interfering destructively) to reduce the power radiated in other directions. Similarly, when used for receiving, the separate radio frequency currents from the individual antennas combine in the receiver with the correct phase relationship to enhance signals received from the desired directions and cancel signals from undesired directions.

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An Antenna is a transducer, which converts electrical power into electromagnetic waves and vice versa. An Antenna can be used either as a transmitting antenna or a receiving antenna. A transmitting antenna is one, which converts electrical signals into electromagnetic waves and radiates them. A receiving antenna is one, which converts electromagnetic waves from the received beam into electrical signals. In two-way communication, the same antenna can be used for both transmission and reception. Basic Parameters Frequency Wavelength Impedance matching VSWR & reflected power Bandwidth Percentage bandwidth Radiation intensity.

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Fundamentals of Array Antenna

1. Antenna Engineering CHO, Yong Heui Fundamentals of Array Antenna

2.

3. Microstrip patch antenna 1. Introduction Single patch antenna Linear array: series feeding Planar array: parallel feeding 

4. Conformal array antenna 1. Introduction Conformal array: microstrip patch and cavity (Alcatel) Spot beam of LEO satellite 

5.

6.

7. Active integrated antenna 3. Active antenna

8. Receiving module for active antenna 3. Active antenna

9. Self structuring antenna 3. Active antenna