Design of Low-Profile High-Gain EBG Resonator Antennas Using a Genetic Algorithm

• Published in: IEEE antennas and wireless propagation letters Vol. 6; pp. 480 - 483
• Main Authors: Yuehe Ge, Esselle, K.P., Yang Hao
• Format: Journal Article
• Language: English
• Published: New York IEEE 2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm design and analysis; Antennas; Design optimization; Electromagnetic band-gap (EBG); Etching; Frequency selective surfaces; Gain; genetic algorithm (GA); Genetic algorithms; high directivity; high gain; Holes; Multilayers; Noise levels; Nonhomogeneous media; Optimization; Optimization methods; Prototypes; Q factor; Resonance; resonator antenna; Resonators
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2007.907054

In this letter, we present a method to enhance the gain of electromagnetic band-gap (EBG) resonator antennas composed of a single-substrate frequency-selective-surface (FSS) using a genetic algorithm (GA). In our method, the gain enhancement is realized by optimizing the metallic patterns etched on the two surfaces of the FSS layer, using a GA, and, hence, increasing the quality factor (Q-factor) of the EBG resonant cavity. The method is demonstrated using an example design and a prototype single layer EBG resonator antenna that achieves a gain of over 21 dB, which is normally reached only by a multilayer EBG antenna if the metallic patterns are not optimized.