Archimedean spiral


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Related to Archimedean spiral: Logarithmic spiral

Archimedean spiral

[¦är·kə¦mēd·ē·ən ′spī·rəl]
(mathematics)
A plane curve whose equation in polar coordinates (r, θ) is rm = am θ, where a and m are a positive or negative integer.
References in periodicals archive ?
The Archimedean spiral (right) maintains a constant distance between coils.
A two-arm Archimedean spiral antenna with bent ends", IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), p 535-8, (2012).
In conclusion, a multi-band CMM based on Archimedean spiral structures is proposed.
The spiral antenna has a two-armed Archimedean spiral with four numbers of turn.
2, we have F(a, [theta]) = a[theta], the Archimedean spiral.
If the merry-go-round starts to turn while you are walking on it, someone watching you who is not on the merry-go-round, would see you moving around an Archimedean spiral.
The Archimedean spiral has a linear rate of expansion and is not truly frequency independent, but its electrical properties are very similar to those of the equiangular spiral and it is easier to manufacture.
Their group was known as Spiral (for the Archimedean spiral that simultaneously moves both upward and outward).
As mentioned earlier (General model), an Archimedean spiral circles outward from a focus in a continuous curve.
Tenhunen, "Design and fabrication of wideband archimedean spiral antenna based ultra-low cost "green" modules for RFID sensing and wireless applications," Progress In Electromagnetics Research, Vol.
Two Archimedean spiral antennas were used to measure right-hand circular polarization and left-hand circular polarization radiation, respectively.