Results 111 to 120 of about 45,125 (224)

An ultra‐thin switched state active frequency selective surface absorber with wide bandwidth using semi‐analytical method

open access: yesIET Microwaves, Antennas & Propagation
Using low‐voltage forward biased PIN diodes, an ultrathin switched states active frequency selective surface based microwave absorber is designed. Using a semi‐analytical method, the NXP#BAP70‐03 PIN diode‐based single polarised unit‐cell of the active ...
Z. A. Pandit Jibran   +3 more
doaj   +1 more source

Soil Moisture Content Inversion by Coupling AEA and ARMA [PDF]

open access: yesRadioengineering
This study aimed to explore the inversion method of soil moisture content by using numerical simulation and field detection. The researchers used the early signal amplitude envelope (AEA) method to directly invert soil moisture in the shallow part of the
Y. Feng, J. Nie, G. Xie, H. Lv
doaj  

Pulsed operation and performance of commercial GaN HEMTs [PDF]

open access: yes, 2009
Beach, MA, Fornetti, F, Morris, KA
core  

Structuring the skies: Diel dynamics of migratory animal movement in the lower atmosphere. [PDF]

open access: yesEcology
Giuntini S   +12 more
europepmc   +1 more source

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