Abstract
A six-element microstrip patch antenna based on the
theory of small reflection is investigated. The radiators are excited
by a novel transmission line. The maxim and minim energy on the
proposed transmission line are determined based on voltage
allocation on a short-circuited microstrip line. Each radiator,
made of a square microstrip patch, is designed to resonate at 5.8
GHz target frequency, with each of them carefully positioned at
the maxim in a series-fed array arrangement, in order to catch
optimal radiation on excitation of the line. The results obtained are
impressive, with an impedance bandwidth of about 6.90%, an
aperture size of 1.6λ × 2.1λ and a gain of about 14.2 dBi. The feed
demonstrates a compact size advantage, in particular when
compared with the conventional series feed network.