Abstract
AbstractIn order to offer RFID services on mobile phones, the RFID reader must be embedded on the handset as a chip. However, the directional coupler was used as a ceramic passive component in conventional handsets. RFID system using an identical Tx/Rx carrier frequency has a significant volume limitation compared with active components. This article presents the directional coupler design for UHF RFID mobile reader using IPD (Integrated Passive Device) process. T and π‐type coupler with dimensions of 1.74 × 1.6 and 1.32 × 1.4 mm2 were assembled. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1501–1504, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22497
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