RFID	Radio frequency identification
SHM	Structural health monitoring
LDR	Light dependent resistor
FBG	Fiber Bragg grating
ESA	European Space Agency
PMMA	Polymethylmethacrylate
RTD	Resistance temperature detector
BST	Barium strontium titanate
SIR	Stepped impedance resonator
PCB	Printed circuit board
IC	Integrated circuit
CFRP	Carbon-fiber-reinforced plastic
GFRP	Glass-fiber-reinforced plastic
SFCW	Stepped frequency continuous wave
FMCW	Frequency-modulated continuous wave
IR-UWB	Impulse radio ultrawideband
UWB	Ultrawideband
EM	Electromagnetic
RCS	Radar cross-section