Spiral Antennas

Archimedean, rectangular, and equiangular spiral

Spiral Antenna Catalog

spiralArchimedean

spiralEquiangular

spiralRectangular

Antenna Element Catalog

Spiral antennas are frequency-independent antennas. These antennas are used in wireless communications and applications that requires larger bandwidth of operation.

Apps

Antenna Designer	Design, visualize, and analyze antennas
Antenna Array Designer	Design, visualize, and analyze arrays

Objects

`spiralArchimedean`	Create Archimedean spiral antenna
`spiralEquiangular`	Create equiangular spiral antenna
`spiralRectangular`	Create rectangular spiral antenna on xy-plane (Since R2020a)

Functions

`show`	Display antenna, array structures, shapes, or platform
`info`	Display information about antenna, array, or platform
`rectspirallength2turns`	Calculate number of turns for specified arm length in rectangular spiral antenna (Since R2020a)
`design`	Design prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects

Featured Examples

Archimedean Spiral Design Investigation

Compares the results published in [1] for an Archimedean spiral antenna with those obtained using the toolbox model of the spiral antenna. The two-arm Archimedean spiral antenna( r = R ϕ ) can be regarded as a dipole, the arms of which have been wrapped into the shape of an Archimedean spiral. This idea came from Edwin Turner around 1954.

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Modeling Resonant Coupled Wireless Power Transfer System

Create and analyze a resonant coupling type wireless power transfer (WPT) system with an emphasis on concepts such as resonant mode, coupling effect, and magnetic field pattern. The analysis is based on a two-element system of spiral resonators.

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Reflector Backed Equiangular Spiral

The spiral antenna is an inherently broadband, and bidirectional radiator. This example will analyze the behavior of an equiangular spiral antenna backed by a reflector [1]. The spiral and the reflector are Perfect Electric Conductors (PEC).

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Equiangular Spiral Antenna Design Investigation

Compares results published in [1] for a two-arm equiangular spiral antenna on foamclad backing(ϵr≈ 1), with those obtained using the toolbox model of the spiral antenna of the same dimensions. The spiral antennas belong to the class of frequency-independent antennas. In theory, such antennas may possess an infinite bandwidth when made infinitely large. In reality, a finite feeding region has to be established and the outer extent of the spiral antenna has to be truncated.

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