A planar E-inverted antenna comprises a signal line connecting to a signal source
for feeding a voltage signal; first and second short-circuit ends respectively
connecting to a grounding area for outputting the voltage signal to the grounding
area; and a radio-frequency area, being supported over the grounding area by means
of the first and second short-circuit ends. The radio-frequency area and the grounding
area have approximately a same length so that a signal is corresponded in radio-frequency
to the length of the radio-frequency area and an electromagnetic wave of the corresponding
frequency is received from the outside, the corresponded signal traveling to the
grounding area via the short-circuit ends.
