# Documentation

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## Description

The dipoleBlade object is a wideband blade dipole antenna oriented along the X-Y plane.

The width of the dipole is related to the circular cross-section by the equation,

$w=2d=4r$

, where:

• d is the diameter of equivalent cylindrical pole

• r is the radius of equivalent cylindrical pole

For a given cylinder radius, use the cylinder2strip utility function to calculate the equivalent width.

## Creation

### Description

example

db = dipoleBlade creates a wideband blade dipole antenna on the X-Y plane.

db = dipoleBlade(Name,Value) creates a wideband blade dipole antenna, with additional properties specified by one or more name-value pair arguments. Name is the property name and Value is the corresponding value. You can specify several name-value pair arguments in any order as Name1, Value1, ..., NameN, ValueN. Properties not specified retain their default values.

## Properties

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Blade dipole length, specified as a scalar in meters.

Example: 'Length',0.5

Data Types: double

Blade dipole width, specified as a scalar in meters.

Example: 'Width',0.2

Data Types: double

Taper length, specified as a scalar in meters.

Example: 'TaperLength',0.500

Data Types: double

Blade dipole feed width, specified as a scalar in meters.

Example: 'FeedWidth',0.006

Data Types: double

Blade dipole feed length or distance between the two wings of the dipole, specified as a scalar in meters.

Example: 'FeedGap',0.006

Data Types: double

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

Example: 'Load',lumpedelement. lumpedelement is the object handle for the load created using lumpedElement.

Tilt angle of antenna, specified as a scalar or vector with each element unit in degrees.

Example: 'Tilt',90

Example: 'Tilt',[90 90 0]

Data Types: double

Tilt axis of the antenna, specified as:

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

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

• A string input for simple rotations around the principal planes, X, Y, or Z.

Example: 'TiltAxis',[0 1 0]

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

Example: 'TiltAxis','Z'

Data Types: double

## 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 for resonance at specified frequency 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 pattern Radiation pattern 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 returnLoss Return loss of antenna; scan return loss of array sparameters S-parameter object vswr Voltage standing wave ratio of antenna

## Examples

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Create and view a default blade dipole.

db =

Length: 0.1170
TaperLength: 0.1120
Width: 0.1400
FeedWidth: 0.0030
FeedGap: 0.0030
Tilt: 0
TiltAxis: [1 0 0]

show(db);

pattern(db,600e6)

## References

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

[2] Volakis, John. Antenna Engineering Handbook. 4th Ed. New York: McGraw-Hill, 2007.