Designing of Smart Antenna for improved directivity and gain at terahertz frequency range

In the present scenario the challenge is to transmit the data at rate 10 gigabits per second for the terahertz frequency regime. One prominent technique that can proffer solution for the efficient transmission at this frequency wideband is Smart Antenna. This research work proposed and examined smart antennas also known as adaptive array antennas at terahertz frequency range. The prototype antenna is suitably operating in the range of 300 GHz to 3 THz for wireless local area network applications that uses high-frequency radio waves. The antenna has been put together on a Rogers RT Duroid dielectric substrate of Svensson/Djordjevic loss type with dielectric permittivity of ε
r
= 2.33, loss factor/tangent (tan δ) of 1.2 * 10
⁻³
, relative permeability (µ
r
) = 1 and the thickness of h = 0.80 mm. Rogers RT Duroid dielectric substrate has been taken as our substrate due to the low dielectric loss which make it suitable for high-frequency laminate over the FR-4 substrate. The antenna receives input power and radiated power at 15.55 Watts in a specific direction, focusing the desired signals from where they come forth allowing for increased radiation efficiency of 100% and mitigate interfering signals from unwanted sources. The antenna has a peak directivity of 17.6 dB, this made it possible for the maximum power transfer. The simulated results are shown in Fig. 1 to Fig. 3. The sum of the far fields E radiated from the array is equation where E
i
is the far field of the ith antenna given as: equation