Investigations on 1x8 linear array of cavity backed E-slotted E-shaped patch antenna for Ku band applications

This paper presents a 1x8 linear array of broadband cavity backed E-slotted E-shaped patch antenna for Ku-band satellite applications. The novel aspect is to integrate slots around the E-shaped patch, achieving more than 18% of bandwidth. The initial design of radiating element mainly focuses on improving the impedance and pattern bandwidth. The optimized length and width of the radiating element is
$0.528\ \lambda_{0}\times 0.528\ \lambda_{0}$
. A linear array is fed either with equal power divider or transmit receive modules. The proposed linear array is designed and optimized for its electrical performance by using 3D electromagnetic simulator, HFSS. The array is exacted to operate in Ku-band over 15–18 GHz with minimum realized gain of 13.5 dB. It achieves half power beam width (HPBW) 12.8° at azimuth (Az), 102.6° at elevation (El) plane at 15 GHz, and 9.9° at azimuth (Az) plane, 103° elevation (El) plane at 18 GHz. The active VSWR of <2.5 is achieved over scan angles of ±45° in either direction.