Submission Title

Circularily Polarized Helical Antenna Optimization

Session Number

RS7

Location

Robinson 210

Abstract Number

RS7-a

Abstract

An omnidirectional circularly polarized bifilar helical antenna element was developed. This low-profile radiating antenna is composed of two individual elements providing orthogonal right and left hand circular polarization in an omnidirectional pattern. A parameterized single element model was captured in HFSS. Circular polarization and an omnidirectional pattern were optimized through parametric sweeps of aspect ratio, number of turns, and transitional bend radius. A mathematical model was produced, such that these parameters could be adjusted independently for optimization. Special attention was given to the transitional bend between the helical arm and the straight crossbar to increase the antenna’s performance. The resultant fabricated element operates at 960MHz, exhibits right hand circularly polarized azimuthal gain at 1.4dBi, azimuthal gain variation ≤1.43dB, ±45° vertical beamwidth, and axial ratio ≤0.9dB. These antennas can be applied in adaptive polarization and MIMO transceiver systems.

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Apr 23rd, 10:45 AM Apr 23rd, 12:15 PM

Circularily Polarized Helical Antenna Optimization

Robinson 210

An omnidirectional circularly polarized bifilar helical antenna element was developed. This low-profile radiating antenna is composed of two individual elements providing orthogonal right and left hand circular polarization in an omnidirectional pattern. A parameterized single element model was captured in HFSS. Circular polarization and an omnidirectional pattern were optimized through parametric sweeps of aspect ratio, number of turns, and transitional bend radius. A mathematical model was produced, such that these parameters could be adjusted independently for optimization. Special attention was given to the transitional bend between the helical arm and the straight crossbar to increase the antenna’s performance. The resultant fabricated element operates at 960MHz, exhibits right hand circularly polarized azimuthal gain at 1.4dBi, azimuthal gain variation ≤1.43dB, ±45° vertical beamwidth, and axial ratio ≤0.9dB. These antennas can be applied in adaptive polarization and MIMO transceiver systems.