Radiation efficiency of antenna
Radiation Efficiency of Top-Hat Monopole Antenna
Create a top-hat monopole antenna.
m = metal("Lead"); ant = monopoleTopHat(Conductor=m); show(ant)
Plot the radiation efficiency of the antenna over a frequency range of 40-100 MHz.
Compare Radiation Efficiency of Antennas with Different Metal Patches
Create and visualize patch microstrip antennas with PEC, copper, silver, and aluminium metal patches.
ant_patchPEC = patchMicrostrip(Substrate=dielectric("Air"),Conductor=metal("PEC")); ant_patchCopper = patchMicrostrip(Substrate=dielectric("FR4"),Conductor=metal("Copper")); ant_patchSilver = patchMicrostrip(Substrate=dielectric("FR4"),Conductor=metal("Silver")); ant_patchAluminium = patchMicrostrip(Substrate=dielectric("FR4"),Conductor=metal("Aluminium"));
Compare the radiation efficiency of these antennas at the frequency of 1 GHz.
Eff_patchPEC = efficiency(ant_patchPEC,1e09)
Eff_patchPEC = 1
Eff_patchCopper = efficiency(ant_patchCopper,1e09)
Eff_patchCopper = 0.4889
Eff_patchSilver = efficiency(ant_patchSilver,1e09)
Eff_patchSilver = 0.4319
Eff_patchAluminium = efficiency(ant_patchAluminium,1e09)
Eff_patchAluminium = 0.4870
object — Antenna or array
antenna object | array object | custom antenna | custom array |
Antenna or array to calculate the efficiency, specified as an antenna or array from
the catalog, a
pcbStack object or custom antenna or array
created using either of these:
Only homogeneous arrays are supported for
calculation, with an exception of
frequency — Frequency range to calculate radiation efficiency
scalar in Hz | vector in Hz
Frequency or frequency range over which to calculate the radiation efficiency, specified as a scalar or a vector in Hz.
E — Radiation efficiency of antenna
scalar | vector
Radiation efficiency of the antenna, returned as a scalar or a vector with values in the range [0,1].
The time-average power density radiated by an antenna is:
where, r = radius of the sphere,
θ, φ = spherical coordinate angles,
E, H = electric and magnetic field intensity respectively.
The total power radiated by antenna is:
where, U = radiation intensity (W/ unit solid angle),
dΩ = element of solid angle.
The radiation efficiency is given as:
where, Pin = total input power.
Introduced in R2021a