WIDEBAND LOW PROFILE ANTENNA FOR AERODYNAMICS PROFILES AND PLANAR SURFACES

Author(s) : Athulya Ravi

Volume & Issue : VOLUME 2 / 2017 , ISSUE 1

Page(s) : 84-87


Abstract

Wideband antennas with end fire radiation and vertical polarization have been widely used in the applications of aircrafts, missiles, wind turbine blade deflection sensing systems and unmanned aerial vehicles. In high performance these application where the size, weight, cost, performance, ease of installation on rigid as well as planar surfaces and aerodynamics profile are constraints low profile may be required. Presently there are many governments and commercials application, such as mobile radio and wireless comm.unication that has the similar specification .To meet these specification micro strip antennas are used. The major dis-advantages of micro strip antenna are narrowband, low efficiency. compact wideband and low- profile antenna mountable on large metallic surfaces. Six rows of coupled micro strip resonators with different lengths are printed on a Teflon block. The lengths of the micro strip resonators in different rows are gradually reduced along the end fire direction. The first four rows of resonators provide four resonances at different frequencies for bandwidth enhancement. The last two rows of resonators are used as two directors to suppress side lobe levels at high frequencies. A trapezoidal launcher is applied to serve as a reflector and provide one resonance at the lowest frequency. A trapezoid-shaped capa-citive- feed strip is utilized and also printed on the Teflon block to globally opti-mize the wideband impedance matching.



Keywords

coupled micro strip resonator, large metallic surface, low profile, trapezoidal launcher

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