On the design of four layered circular microstrip patch antenna

✍ Scribed by Raj Kumar; P. Malathi; Yogesh B. Thakare

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 416 KB
• Volume: 50
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.23920

✦ Synopsis

Abstract

This article presents a simple design expression to calculate resonant frequency (f~r~) of a four‐layered circular microstrip patch. The resonant frequencies calculated by present method are in good agreement with the calculated value by FDTD method. The average % deviation for circular microstrip patch (CMP) with and without cover is 0.4 and 0.56%, respectively. The average % deviation against FDTD method for composite and suspended CMP is 0.5 and 0.61%, respectively. The change in f~r~ for composite/suspended CMP decreases as the height of the cover increases. The average and maximum % deviation for intentional or unintentional spaced dielectric is 0.43 and 0.85%, respectively upto ratio of h~4~/h~3~ = 14. The intentional or unintentional air‐gap brings down the f~r~ of CMP. As air‐gap increases, the f~r~ tends towards the f~r~ of CMP. Spaced dielectric effect on f~r~ is more for small air‐gap. The effect of loaded ice or superstrate on covered CMP further lowers down the resonant frequency. Its effect is more on f~r~ for small h~4~/h~3~ ratio. The incremental % change due to loaded superstrate on covered CMP is less than 0.4% and average % deviation against FDTD method is 0.89%. This expression is suitable for computer aided design. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3206–3212, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23920