spiralRectangular
Description
The spiralRectangular
object creates a single or two-arm
rectangular spiral antenna. The default rectangular spiral has two arms, is center-fed
and is on the xy-plane. The default resonating frequency is 7.65
GHz.
A spiral rectangular antenna is made up of filaments. The distance between the two violet dashed lines in the diagram represents the first filament or the initial width. The distance between the two orange dashed lines in the diagram represents the second filament or the initial length.
Creation
Description
creates
a default rectangular spiral antenna object operating at 7.65 GHz.ant
= spiralRectangular
creates a rectangular spiral antenna, with additional Properties
specified by one or more name-value arguments. ant
= spiralRectangular(Name=Value)Name
is
the property name and Value
is the corresponding value.
You can specify several name-value arguments in any order as
Name1=Value1
, ...
,
NameN=ValueN
. Properties not specified retain their
default values.
Properties
Object Functions
axialRatio | Calculate and/or plot axial ratio of antenna or array |
bandwidth | Calculate and/or plot absolute bandwidth of antenna |
beamwidth | Beamwidth of antenna |
charge | Charge distribution on antenna or array surface |
current | Current distribution on antenna or array surface |
design | Design prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects |
efficiency | Radiation efficiency of antenna |
EHfields | Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays |
impedance | Input impedance of antenna or scan impedance of array |
info | Display information about antenna, array, or platform |
memoryEstimate | Estimate memory required to solve antenna or array mesh |
mesh | Mesh properties of metal, dielectric antenna, or array structure |
meshconfig | Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry |
optimize | Optimize antenna or array using SADEA optimizer |
pattern | Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array |
patternAzimuth | Azimuth plane radiation pattern of antenna or array |
patternElevation | Elevation plane radiation pattern of antenna or array |
rcs | Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array |
rectspirallength2turns | Calculate number of turns for specified arm length in rectangular spiral antenna |
resonantFrequency | Calculate and/or plot resonant frequency of antenna |
returnLoss | Return loss of antenna or scan return loss of array |
show | Display antenna, array structures, shapes, or platform |
sparameters | Calculate S-parameters for antennas and antenna arrays |
vswr | Voltage standing wave ratio (VSWR) of antenna or array element |
Examples
References
[1] Nakano, H., H. Yasui, and J. Yamauchi. “Numerical Analysis of Two-Arm Spiral Antennas Printed on a Finite-Size Dielectric Substrate.” IEEE Transactions on Antennas and Propagation 50, no. 3 (March 2002): 362–70. https://doi.org/10.1109/8.999628.
[2] Nakano, H., J. Eto, Y. Okabe, and J. Yamauchi. “Tilted- and Axial-Beam Formation by a Single-Arm Rectangular Spiral Antenna with Compact Dielectric Substrate and Conducting Plane.” IEEE Transactions on Antennas and Propagation 50, no. 1 (January 2002): 17–24. https://doi.org/10.1109/8.992557.
Version History
Introduced in R2020a