Abstract
A simple and novel microstrip-fed dielectric resonator (DR) as fixed frequency source is
proposed design. The feed mechanism consists of three microstrip line sections, each of a width
approximately equal to its characteristic impedance. The DR located at the centre of the grounded
laminate Roger RO4003C Duroid microwave board of size 18 × 18 sq. mm, with a substrate height
of 0.813 mm, dielectric constant εr = 3.38 ± 0.05, and a metallization of 35μm is excited by these
microstrip lines such that port 1 and 2 are oppositely edges-coupled to the DR in a balanced parallel
arrangement, whereas, the third microstrip line is orthogonal to the microstrip feed line excited by
port 2. Each of the feed line are located at a coupling space (β) of 0.24 mm away from the DR,
whereas, the third orthogonal microstrip line is capacitively coupled through the excitation of port
1 and 2. Both the measured and numerical results agreed reasonably.