Create capacitively loaded monopole antenna over rectangular ground plane
The monopoleTopHat
object is a top-hat monopole antenna
mounted over a rectangular ground plane. The monopole always connects with the center of
top hat. The top hat builds up additional capacitance to ground within the structure.
This capacitance reduces the resonant frequency of the antenna without increasing the
size of the element.
The width of the monopole is related to the diameter of an equivalent cylindrical monopole by the expression
where:
d is the diameter of equivalent cylindrical monopole
r is the radius of equivalent cylindrical monopole.
For a given cylinder radius, use the cylinder2strip
utility function to calculate the equivalent width. The
default top-hat monopole is center-fed. The feed point coincides with the origin. The
origin is located on the X-Y plane.
creates a
capacitively loaded monopole antenna over a rectangular ground plane.mth
= monopoleTopHat
creates a capacitively loaded monopole antenna with additional properties
specified by one or more name-value pair arguments. mth
= monopoleTopHat(Name,Value)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.
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 at specified frequency |
efficiency | 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 |
returnLoss | Return loss of antenna; scan return loss of array |
sparameters | S-parameter object |
vswr | Voltage standing wave ratio of antenna |
[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.