Abstract
A novel parallel-coupled microstrip feed line is
proposed. The feed relies on the capacitance contribution arising
from the capacitances occurring at adjacent split sections in
order to lower the high intrinsic input impedance common to
microstrip patch antennas. It is expected that the capacitance
contribution will enhance the frequency pattern of the microstrip
passive and thus overcome the narrow bandwidth tendency of the
traditional patch. The novel feed has demonstrated enhanced
impedance bandwidth, and the results have been validated
theoretically, numerically and by measurement.