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Quarter‐wave phase‐compensating multidielectric lens design using genetic algorithms

This paper illustrates a microwave dielectric lens design using genetic algorithms (GAs). A quarter‐wave phase‐compensating multidielectric lens, using four types of materials and a zoned structure, is designed using GAs. The dielectric lens shape was designed using a GA with a random initial shape in order to compensate for the phase error of the multidielectric lens and achieve the required performance. The simulation result, which is performed using high‐frequency simulation software (HFSS) from Ansoft, shows that the gain of the side lobes decreases 21‐dB more when using our GAs designed multidielectric lens, as compared with the simulation result of the conical‐horn antenna without multidielectric lens. The performance from −150° to 150° angles achieved improvement, which proves that GAs may be an effective method for lens design. Further work will be done in this area. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 44: 165–169, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20577