Thin-Profile Wideband and High-Gain Microstrip Patch Antenna on a Modified AMC

A low-profile, high-gain, and broadband U-slot cut artificial magnetic conductor (AMC) loaded patch antenna is presented in this letter. The wideband performance is achieved by strategically cutting two rectangular slots and inserting four strips onto a conventional AMC ground plane. Moreover, a defected ground structure is used to reduce the antenna size. As a result, four reflection zeroes are obtained within the antenna |
$S_{11}$
| curve. The antenna is characterized by a low profile (
$\boldsymbol{h}/{\boldsymbol{\lambda }_0}\sim 0.05$
,
${\boldsymbol{\lambda }_0}$
is the free-space wavelength at the center frequency), wide bandwidth 58.6%, light weight, low cost, and wide 10 dBi gain bandwidth. The presented antenna is suitable for C-band satellite (3.7–4.2 GHz), 5.15–5.35 GHz WLAN, and the 5G in 3–6 GHz band applications.