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A compact, 3D printed tripolar antenna operating at 2.4 GHz is presented. The antenna is designed for integration with a commercial wireless node in order to mitigate multipath and depolarization channel effects that could exist in many machine-to-machine deployments. The antenna substrate is fabricated with fused deposition modeling and the conductive layers by micro-dispensing silver paste. A median...
Radio frequency identification (RFID) tag design is generally focused specifically on either off-metal or on-metal configurations. In this letter, passive 2-D and 3-D RFID tags are presented, which perform similarly in both configurations. The tags operate in the industrial, scientific, and medical (ISM) RFID UHF bands (864–868 MHz and 902–928 MHz). A matching loop consisting of two parallel stubs...
This paper describes the design and validation by simulation of compact dual-port reconfigurable antennas (via switches) providing antenna diversity or port duplexing, which in turn are useful in advanced techniques such as cognitive radio (CR) and Multiple-Input Multiple-Output (MIMO). The design results from optimization of an initial structure using the Genetic Algorithm (GA) and evaluated via...
This paper describes the design, fabrication, and experimental validation of a compact antenna reconfigurable in frequency using PIN diode switches. The resulting device has a footprint under 0.2λ × 0.2λ at the lowest operating frequency and affords frequency tunability in the band 1.7GHz–2.7GHz with five PIN diode switches. Key aspects such as the importance of efficient full-wave simulation and...
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