Design and simulation of an equiangular spiral antenna for extremely high-frequencies

Abstract

This paper presents the design and simulation processes of an Equiangular Spiral Antenna for the extremely high frequencies between 65 GHz and 170 GHz. A new approach for the analysis of the antenna's electrical parameters is described. This approach is based on formalism proposed by Rumsey to determine the EM field produced by an equiangular spiral antenna. Analytical expressions of the electrical parameters such as the gain or the directivity are then calculated using well sustained mathematical approximations. The comparison of obtained results with those from numerical integration methods shows a good agreement

A Design Methodology for the Implementation of Planar Spiral Antennas With an Integrated Corporate Feed

“…Since self-complementary structures provide good antenna characteristics [5], the angular width of the arm δ is set to π/2. Investigations carried out in [24] and [25] show that less tightly wrapped equiangular spiral with an arm expansion between 0.2 and 0.3 can achieve good axial ratio's values. For this reason, the expansion ratio a is chosen to be 0.3 corresponding to an angle Ψ = arctan 1 a = 73.3 • .…”

A planar equiangular spiral antenna array for the V-/W-band

“…Its expansion ratio a is 0.3 which corresponds to an angle approximately equals to 73.3 o . This choice of expansion value was motivated through the fact that it provides the best radiation characteristics with respect to return loss, input impedance and axial ratio when compared to antennas with arm growths of values 0.1 and 0.22 [7]. The arm length of the antenna is 5.5 mm, which as per the well-known design equation (8) in [7] corresponds to an inner radius of 0.1 mm and an outer radius of 1.68 mm.…”

Review of Design Strategies of Dual/Tri-Band Antennas for GPS and Irnss Applications

“…As cited in [17], the equiangular spiral antenna for extremely high frequencies is proposed which performs at 65GHz and 170GHz. Simulation is carried out using the Ansoft Designer.…”