英文關鍵字
aerial
agriculture
antennas
array
broadcasting
cable
circuit
communication
complex
conductor
electrical
electromagnetic
emission
fields
frequency
gain
grid
ground
hertz
high
impedance
installation
lightning
lines
long
metallic
network
pole
power
propagation
radiation
radio
resonance
signal
sky
spectrum
steel
tall
technology
tower
transmission
watts
wave
wavelength
waves
wires