Abstract:
An Inverted L-C-shape EBG antenna is presented for C-band application in
communication technology in this thesis. An Epsilon Negative (ENG) Material is
used for an effective antenna design.FR-4 material is used as a substrate of 11×11
mm2 dimensions in this design having a dielectric constant is 4.3 and a thickness
is 1.6 mm in unit cell design. But the dimension of the antenna is double to unit
cell dimensions suchas 22×22 mm2wherethe mainpatchantenna,EBGstructure,
or unit cell design consists of copper metal with 0.035 mm thickness and 10×10
mm2 dimension. At the resonant frequency of 8.01 GHz, the return loss
magnitude is-42.29 dB for the proposed EBGantenna and coversthe C-band and
lower ling of X-band quality to communicate. A 90.0 MHz bandwidth was
obtained from the inverted L-C-shape EBG antenna. Instead, the conventional
microstrip patch antenna provides 60 MHz bandwidth at the resonant frequency
of 7.11 GHz. The gain and directivity of the proposed EBG antenna are 6.42 dBi
and 7.27 dBi. Similarly, the required SNG material provides the only negative
value of electric polarizability is-1.69 enclosing the C-Band at the resonant
frequency of 7.11 GHz. The efficiency rate is 68.52% which refers to good EBG
antenna performance. The resulting performance with EBG technology provides
better performance such as return loss, far-field directivity, and bandwidth than
a basic microstrip patch antenna (without EBG). Specifically, the utilizing
properties of electromagnetic waves of ENG materials provides strengthening
gain and overall performance in EBG Antenna technology and that’s the goal of
our thesis study.
