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bowtieRounded

Create rounded bowtie dipole antenna

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Description

ThebowtieRounded对象是一个平面领结天线,圆ges, on theyz- plane. The default rounded bowtie is center fed. The feed point coincides with the origin. The origin is located on theyz- plane.

Creation

Syntax

br = bowtieRounded
br = bowtieRounded(Name,Value)

Description

br= bowtieRoundedcreates a half-wavelength planar bowtie antenna with rounded edges.

example

br= bowtieRounded(Name,Value)creates a planar bowtie antenna with rounded edges, with additional properties specified by one or more name-value pair arguments.Nameis the property name andValueis the corresponding value. You can specify several name-value pair arguments in any order asName1,Value1,...,NameN,ValueN. Properties not specified retain their default values.

Properties

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Rounded bowtie length, specified a scalar in meters. By default, the length is chosen for the operating frequency of 490 MHz.

Example:'Length',3

Data Types:双

Rounded bowtie flare angle, specified a scalar in degrees.

Note

Flare angle should be less than175degrees and greater than5degrees.

Example:'FlareAngle',80

Data Types:双

Type of the metal used as a conductor, specified as a metal material object. You can choose any metal from theMetalCatalogor specify a metal of your choice. For more information, see金属. For more information on metal conductor meshing, seeMeshing.

Example:m = metal('Copper'); 'Conductor',m

Example:m = metal('Copper'); ant.Conductor = m

Lumped elements added to the antenna feed, specified as a lumped element object. For more information, seelumpedElement.

Example:'Load', lumpedelement.lumpedelementis the object for the load created usinglumpedElement.

Example:br.Load = lumpedElement('Impedance',75)

Tilt angle of the antenna, specified as a scalar or vector with each element unit in degrees. For more information, seeRotate Antennas and Arrays.

Example:'Tilt',90

Example:ant.Tilt = 90

Example:'Tilt',[90 90],'TiltAxis',[0 1 0;0 1 1]tilts the antenna at 90 degrees about the two axes defined by the vectors.

Note

ThewireStackantenna object only accepts the dot method to change its properties.

Data Types:双

Tilt axis of the antenna, specified as:

  • Three-element vector of Cartesian coordinates in meters. In this case, each coordinate in the vector starts at the origin and lies along the specified points on the X-, Y-, and Z-axes.

  • Two points in space, each specified as three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points in space.

  • A string input describing simple rotations around one of the principal axes, 'X', 'Y', or 'Z'.

For more information, seeRotate Antennas and Arrays.

Example:'TiltAxis',[0 1 0]

Example:'TiltAxis',[0 0 0;0 1 0]

Example:ant.TiltAxis = 'Z'

Note

ThewireStackantenna object only accepts the dot method to change its properties.

Data Types:双

Object Functions

show Display antenna or array structure; display shape as filled patch
info Display information about antenna or array
axialRatio Axial ratio of antenna
beamwidth Beamwidth of antenna
charge Charge distribution on metal or dielectric antenna or array surface
current Current distribution on metal or dielectric antenna or array surface
design Design prototype antenna or arrays for resonance around specified frequency
效率 Radiation efficiency of antenna
EHfields Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedance Input impedance of antenna; scan impedance of array
mesh Mesh properties of metal or dielectric antenna or array structure
meshconfig Change mesh mode of antenna structure
optimize Optimize antenna or array using SADEA optimizer
pattern Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuth Azimuth pattern of antenna or array
patternElevation Elevation pattern of antenna or array
rcs Calculate and plot radar cross section (RCS) of platform, antenna, or array
returnLoss Return loss of antenna; scan return loss of array
sparameters Calculate S-parameter for antenna and antenna array objects
vswr Voltage standing wave ratio of antenna

Examples

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Open Live Script

Create and view a center-fed rounded bowtie that has a flare angle of 60 degrees.

b = bowtieRounded('FlareAngle',60); show(b);

Figure contains an axes object. The axes object with title bowtieRounded antenna element contains 3 objects of type patch, surface. These objects represent PEC, feed.

Open Live Script

Calculate and plot the impedance of a rounded bowtie over a frequency range of 300 MHz-500 MHz.

b = bowtieRounded('FlareAngle',60); impedance(b,linspace(300e6,500e6,51))

Figure contains an axes object. The axes object with title Impedance contains 2 objects of type line. These objects represent Resistance, Reactance.

References

[1] Balanis, C.A.Antenna Theory: Analysis and Design.3rd Ed. New York: Wiley, 2005.

[2] Brown, G.H., and O.M. Woodward Jr. “Experimentally Determined Radiation Characteristics of Conical and Triangular Antennas”.RCA Review. Vol.13, No.4, Dec.1952, pp. 425–452

Version History

Introduced in R2015a

See Also

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