In this contribution, we describe and analyse a miniature wireless radio frequency identification (RFID) chip with\r\non-chip antennas (OCA) and ultra wideband (UWB) signalling by real-world measurements. With the on-chip antenna\r\napproach, no external antennas are required, and the size of the overall tag is identical to the size of the chip alone\r\n(3.5mm Ã?â?? 1 mm). The chip is powered through inductive coupling and controlled by an RFID signal at 866 MHz in the\r\ndownlink, while the uplink transmits a quaternary pulse-position-modulated (4-PPM) UWB signal at 5.64 GHz with\r\npulses having a duration in the order of nanoseconds. In this contribution, the hybrid or asymmetric communication\r\nscheme between prototype chip and reader, the embedded OCA, and the measurement setup are described. The\r\nprototype achieves 4-PPM bit rate of 126 Mbit/s based on a pulse-train transmission with a duration of 10 Ã?µs. The\r\nsmall size, high data rate, and fine time resolution of the UWB impulse radio offer new features and sensing\r\ncapabilities for future RFID-like applications.
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