Results 1 to 10 of about 137 (111)
Energy-Efficient Harmonic Transponder Based on On-Off Keying Modulation for Both Identification and Sensing [PDF]
Sensors, 2022 This paper presents a novel passive Schottky-diode frequency doubler equipped with an on-off keying (OOK) modulation port to be used in harmonic transponders for both identification and sensing applications.
Valentina Palazzi +2 more
exaly +3 more sources
Harmonic FMCW Radar System: Passive Tag Detection and Precise Ranging Estimation [PDF]
SensorsThis paper details the design and implementation of a harmonic frequency-modulated continuous-wave (FMCW) radar system, specialized in detecting harmonic tags and achieving precise range estimation.
Ahmed El-Awamry +3 more
doaj +2 more sources
An Innovative Harmonic Radar to Track Flying Insects: the Case of Vespa velutina. [PDF]
Sci Rep, 2019 Over the last 30 years, harmonic radars have been effective only in tracking insects flying at low altitude and over flat terrain. We developed an innovative harmonic radar, implementing the most advanced radar techniques, which covers a large field of ...
Maggiora R +3 more
europepmc +2 more sources
A Software Defined Radio Interrogator for Passive Harmonic Transponders
2021 IEEE 21st Annual Wireless and Microwave Technology Conference (WAMICON), 2021 Passive wireless sensors provide an opportunity for long term monitoring of remote environments. Such devices are activated with an interrogation signal which enables them to transmit information via a return signal. Some systems utilize the same frequency for interrogation and the return, which causes unwanted interference, particularly in cluttered ...
Tim Laracy, Jeff Frolik
openaire +2 more sources
Comparing estimates of census and effective population size in an endangered amphibian
Animal Conservation, Volume 26, Issue 6, Page 839-850, December 2023., 2023 The field of conservation has seen a shift in focus from monitoring trends in census population size to trends in ‘effective’ population size. Using data from a long‐term study of reticulated flatwoods salamanders (Ambystoma bishopi) we assessed changes in census population sizes and the effective number of breeders.
G. C. Brooks +3 more
wiley +1 more source
Harmonic Transponder with RF Identification Capability [PDF]
, 2023 V této práci je navržen koncept harmonického transpondéru využívající třípásmovou patch anténu se Schottkyho diodouse schopností RF identifikace pracující na frekvencích f1, f2 = 2f1, a f3 = f2 + ∆f .
Giorgi Aptsiauri
core
, 2022 We herein introduce a lightweight and zero-power smart face mask, capable of wirelessly monitoring coughs in real time and identifying proper mask wearing in public places during a pandemic.
Minye Yang +13 more
core +1 more source
Miniaturized antenna and transponder based wireless sensors for internet of things in healthcare [PDF]
, 2017 Future medical and healthcare systems will be largely improved by the wide-spreading of internet of things (IoTs). One of the crucial challenges of IoTs for healthcare is at the wireless sensors.
Huang, Haiyu
core +1 more source
Compact and Lightweight Planar Harmonic Tag for Operation in Challenging Environments
IEEE AccessThis study presents a compact and lightweight planar harmonic transponder tag for passive sensing and tracking in challenging environments. Harmonic tags are batteryless devices that, when illuminated by an electromagnetic wave from the reader, reradiate
Andrei Mogilnikov +2 more
doaj +1 more source
Multipath Measurement Leveraging In Situ Harmonic Transponders
IEEE Open Journal of Antennas and PropagationWireless communication within complex/cluttered environments is prone to multipath fading effects. Channel sounding are measurement techniques used to find data that characterize the extent of any such fading.
Jeff Frolik
doaj +1 more source