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双叶菌

Create cycloid dipole antenna

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描述

The双叶菌物体是半波长的环形偶极天线。对于默认的环形偶极子，进料点位于循环部分。默认长度的工作频率为48 MHz。

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

w = 2 d = 4 r

, where:

  • dis the diameter of equivalent cylindrical pole

  • r是等效圆柱极的半径

对于给定的气缸半径，请使用cylinder2striputility function to calculate the equivalent width.

Creation

Syntax

dc = dipoleCycloid
dc = dipoleCycloid(Name,Value)

描述

example

dc=二脂菌创建一个半波摆线偶极天线oriented along Z-axis.

example

dc= dipolecycloid（名称，值）creates a half-wavelength cycloid dipole antenna, with additional properties specified by one or more name-value pair arguments.Nameis the property name and价值is the corresponding value. You can specify several name-value pair arguments in any order asName1,Value1,...,纳梅,valuen. Properties not specified retain their default values.

Properties

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偶极子长度z- 轴，指定为标量米。默认情况下，长度为48 MHz的工作频率。

例子：'Length',0.9

Data Types:双倍的

偶极宽度，指定为标量为米。

例子：'宽度',0.09

Data Types:双倍的

Circular loop radius inxy- 飞机, specified as a scalar in meters.

例子：“ Loopradius”，0.500

Data Types:双倍的

Gap of loop inxy- 飞机, specified as a scalar in meters.

例子：'Gap'，0.006

Data Types:双倍的

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.

例子：m =金属（'铜'）;“指挥”，

例子：m =金属（'铜'）;ant.conductor = m

集结元素added to the antenna feed, specified as the comma-separated pair consisting of'Load'和一个集团元素对象。有关更多信息，请参阅块状.

例子：“负载”，块状.lumpedelement是使用使用的对象块状.

例子：dc.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.

例子：“倾斜”，90

例子：ant.Tilt = 90

例子：'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:双倍的

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'.

有关更多信息，请参阅Rotate Antennas and Arrays.

例子：'tiltaxis'，[0 1 0]

例子：'tiltaxis'，[0 0 0; 0 1 0]

例子：ant.tiltaxis ='z'

Note

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

Data Types:双倍的

Object Functions

show Display antenna or array structure; display shape as filled patch
info Display information about antenna or array
axialRatio 天线的轴向比
梁宽 天线的光束宽度
charge 金属或介电天线或阵列表面的电荷分布
current Current distribution on metal or dielectric antenna or array surface
设计 设计原型天线或阵列，以共振围绕指定频率
效率 Radiation efficiency of antenna
埃菲尔德 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
网 金属或介电天线或阵列结构的网格性能
网config Change mesh mode of antenna structure
优化 使用SADEA优化器优化天线或阵列
图案 辐射模式和天线或阵列的相；阵列中天线元件的嵌入式图案
图案Azimuth 天线或阵列的方位角图案
模式增长 Elevation pattern of antenna or array
rcs 平台，天线或阵列的计算和图雷达横截面（RCS）
returnloss Return loss of antenna; scan return loss of array
sparameters 计算天线和天线阵列对象的S参数
vswr 天线的电压站立波比

例子

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打开实时脚本

使用Dipolecychipecliid对象创建一个默认的环形偶极天线并查看。

dc = dipoleCycloid
dc =具有性质的双叶霉素：长度：1.2200宽度：0.0508 loopradius：0.3100 GAP：0.0400导体：[1x1金属]倾斜：0 tiltaxis：[1 0 0]负载：[1x1 lumpedElement]
显示（DC）

图包含一个轴对象。The axes object with title dipoleCycloid antenna element contains 5 objects of type patch, surface. These objects represent PEC, feed.

打开实时脚本

计算在50 MHz -100 MHz的频率范围内，宽度为0.05 m的环形偶极子的阻抗。

d = dipoleCycloid('宽度'，0.05）;阻抗（D，Linspace（50E6,100E6,51））

图包含一个轴对象。带有标题阻抗的轴对象包含2个类型线的对象。这些物体代表电阻，电抗。

打开实时脚本

以48 MHz的频率绘制宽度为0.05 m的宽度的辐射图。

d = dipoleCycloid('宽度',0.05)
d =具有性质的双叶霉素：长度：1.2200宽度：0.0500 loopradius：0.3100间隙：0.0400导体：[1x1金属]倾斜：0 tiltaxis：[1 0 0]负载：[1x1 lumpedElement]
图案（D，48E6）

图包含一个轴对象和类型Uicontrol的其他对象。轴对象包含5个类型补丁的对象。

参考

[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.

Version History

Introduced in R2017a

See Also

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