Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Screen-printed and spray coated graphene-based RFID transponders   We report Ultra-High-Frequency (UHF, 800MHz-1GHz) Radio Frequency
Identification (RFID) transponders consisting of printed dipole antennas
combined with RFID microchips. These are fabricated on Kapton via screen
printing and on paper via spray coating, using inks obtained via
microfluidization of graphite. We introduce a hybrid antenna structure, where
an Al loop (small compared to the overall size of the antenna) is connected to
a microchip with the double function of matching the impedances of antenna and
microchip and avoiding bonding between exfoliated graphite and chip. The
transponders have reading distance~11m at UHF RFID frequencies, larger than
previously reported for graphene-based RFID and comparable with commercial
transponders based on metallic antennas.

22
The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat