This paper presents a novel single-patch wide-band microstrip antenna: the
E-shaped patch antenna. Two parallel slots are incorporated into the patch
of a microstrip antenna to expand it bandwidth. The wide-band mechanism is
explored by investigating the behavior of the currents on the patch. The sl
ot length, width, and position are optimized to achieve a wide bandwidth, T
he validity of the design concept is demonstrated by two examples with 21.2
% and 32.3% bandwidths, Finally, a 30.3% E-shaped patch antenna, resonating
at wireless communication frequencies of 1.9 and 2.1 GHz, is designed, fab
ricated, and measured. The radiation pattern and directivity are also prese
nted.