Analysis Based on Dual Frequency Band Patch Antenna for Radio Frequency Identification Readers

This paper presents an analysis of microstrip Dual Frequency band patch antenna for handheld Radio Frequency Identification (RFID) Reader Applications. The proposed antenna has a dual frequency of 921 MHz and 2450 MHz. The antenna design was made up on a rectangular patch with arms and partial ground plane which has size of 125 mm × 125 mm × 1.6 mm. Moreover, the substrate used in this project has thickness of 1.6 mm with dielectric constant of 4.7 and loss tangent of 0.019. Thus, it is easily embedded inside the handheld reader together with the characteristics of easy fabrication, low profile and simple structure. From the results, the antenna has the reflection coefficient (S ₁₁) less than −10 dB along the bandwidth of 259 MHz (24%) for lower frequency region and 387 MHz (14%) for upper frequency regions.