  This paper presents the design and characterization of a rectangular
microstrip patch antenna array optimized for operation within the Ku-band
frequency range. The antenna array is impedance-matched to 50 Ohms and utilizes
a microstrip line feeding mechanism for excitation. The design maintains
compact dimensions, with the overall antenna occupying an area of 29.5x7 mm.
The antenna structure is modelled on an R03003 substrate material, featuring a
dielectric constant of 3, a low-loss tangent of 0.0009, and a thickness of
1.574 mm. The substrate is backed by a conducting ground plane, and the array
consists of six radiating patch elements positioned on top. Evaluation of the
designed antenna array reveals a resonant frequency of 18GHz, with a -10 dB
impedance bandwidth extending over 700MHz. The antenna demonstrates a high gain
of 7.51dBi, making it well-suited for applications in 5G and future
communication systems. Its compact form factor, cost-effectiveness, and broad
impedance and radiation coverage further underscore its potential in these
domains.
