發送短信 : Array pattern synthesis using eigen-analysis

 _    _     _____    _    _    _    _    _____    
| || | ||  |  ___|| | || | || | || | || |  __ \\  
| || | ||  | ||__   | || | || | || | || | |  \ || 
| \\_/ ||  | ||__   | \\_/ || | \\_/ || | |__/ || 
 \____//   |_____||  \____//   \____//  |_____//  
  `---`    `-----`    `---`     `---`    -----`