Abstract
ABSTRACT This paper proposes an orthogonally positioned inverted triangular monopole antenna over a compact plane reflector with stable radiation pattern for octave band of frequencies. Two triangles are placed crossed and orthogonal to each other to obtain nearly uniform omni-direction radiation pattern. The antenna is placed over a square reflector exhibits 73% bandwidth at (4.5 GHz). The measured impedance bandwidth and radiation pattern of the antenna match well with Finite Element Method (FEM) and Method of Moments (MOM) analysis of the structure. The antenna is novel in its orthogonal design and the triangles fed differently with compact reflector. The designed octave band planar antenna (3.0–6.5 GHz) has applications in Wireless LAN and intelligent transportation systems (ITS). The compact antenna design with uniform radiation pattern is used as radiator inside a room and cabinets for RF isolation measurements.
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