Parametric optimization of Low-profile V-Band antenna for millimeter-wave applications

Millimeter-wave frequencies are most widely used because of low interference and broad bandwidth. This paper introduces a low-profile antenna for millimeter-wave applications at low cost, operated in V-band (40GHz-75GHz) centered at 54GHz. Because of low-profile the proposed antenna is more suitable for body-centric applications. The proposed antenna is to be of small size 14x10.5x0.65 mm
³
, flexible structure along with impedance matching, and for parallel communication at millimeter-wave frequencies. The proposed antenna is designed with flexible printed circuit board (FPCB) as substrate with relative permittivity of 2.7, thickness of the substrate is 0.15mm, fed through microstrip line feed and simulations are carried out by using HFSS tool. The antenna of two E-shaped patches and air gap between substrates, achieves reflection coefficient (S
₁₁
) of -47dB, bandwidth of 18GHz and gain of 4.8dBi.