| Summary: | UHF RFID technology is currently being chosen
to replace the existing soil monitoring system for smart
agriculture. However, when attached to backing objects, the
current RFID tag typically has a large footprint and a short read
distance. Therefore, this paper introduces a compact tag
antenna design comprising a slotted radiating patch connected
to a ground plane via an inductive stub. The tag antenna is
mounted on loamy soil for soil monitoring purposes. The
proposed tag has a small size of only 48.2 � 48.2 mm, a power
transmission coefficient of 0.99, and a longer theoretical read
range of 9m
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