Dual-frequency vertex-fed pentagonal slot on rectangular patch for WLAN/WiMAX applications

The scope of this research paper is to present a new configuration of the dual frequency microstrip patch antenna for wireless local area network WLAN (5.15-5.35) GHz and Worldwide Interoperability for Microwave Access WiMAX (3.4-3.9) GHz applications. The proposed dual-frequency rectangular microstrip antenna with the vertex-fed pentagonal slot is resonates at 3.5 GHz and 5.15 GHz. The antenna performance parameters at 3.5 GHz are the magnitude of the reflection coefficient, VSWR, input impedance, gain and radiation efficiency are found to be 19.12 dB, 1.25, 40.15Ω, 5.6 dBi and 62.42% respectively. While at 5.15 GHz they are found to be 25.28 dB, 1.11, 49.55Ω, 4.55dBi and 63.61% respectively. The proposed antenna achieved an average gain of 5.08 dBi. The stable radiation pattern is observed in both operating frequencies. The performance of proposed antenna is compared with the existing dual-band designs available in the literature.