Rotman Lens Designer Overview



Rotman Lens Designer

Rotman Lens Designer 簡稱RLD是REMCOM公司推出,專門用於設計,分析和合成各種羅德曼透鏡和其變體,RLD可以透過使用者輸入的機構和電子等設計參數,套用幾何光學和古典羅德曼透鏡的設計公式,可以快速地完成設計和分析工作。
RLD可以建立羅德曼透鏡的輪廓,transmission line geometry,absorptive port (dummy port) geometry等特徵,同時會提供一個近似的性能分析,並且建立幾何模型,可以用於同為REMCOM公司的高頻電磁軟體XFdtd使用並且進行後續的模擬分析工作。


Rotman Lens Designer 的各種功能
 
RLD 可以運用典型的羅德曼透鏡參數建立基礎設計,依據這些輸入,RLD可以產出各種延伸的輸出資料並且顯示在軟體操作介面裡,以下是一些重要的輸入和輸出參數:
 
Inputs:
  • Type of lens - microstrip or stripline
  • Impedance of lines
  • Element spacing on the antenna
  • Number of elements (up to 128)
  • Number of beams (up to 128)
  • Maximum scan angle
  • Off-axis focii angle as a fraction of max scan angle
  • Bandwidth and center frequency
  • Electrical characteristics of lens material - dielectric constant, loss tangent, conductivity and thickness of dielectric material
  • Electrical characteristics of absorber material
  • Physical characteristics of lens - focal length/diameter ratio
  • Aperture distribution
  • Port flare angles
Outputs:
  • Calculation of the lens contour and of the transmission line geometry
  • Element locations along the lens contour
  • Insertion loss (per beam port)
  • Amplitude and phase distributions of the array ports versus frequency
  • Beam to array phase error
  • Beam to array coupling magnitude and phase
  • Beam to array sidewall coupling magnitude
  • Beam to array spillover coupling magnitude
  • Array to beam coupling magnitude and phase
  • Array to beam sidewall coupling magnitude
  • Array to beam spillover coupling magnitude
  • S-parameters for all ports
  • Suggested focal length
  • Number of dummy elements
  • Location of loads on dummy elements
  • Location of absorber if necessary
  • Dimensions, volume
  • Gerber format files may be exported with third-party software
  • XFdtd format files may be exported for full wave analysis
  • Export to SAT format 
軟體運作環境需求:
  • Windows 2000 或 XP以上
  • Red Hat Enterprise Linux 4 或以上
  • 最低解析度達1024x768的顯示環境
  • 記憶體達64MB或更高並支援OpenGL的顯示卡
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