Path: Link/RF
% Antenna gain from area and efficiencies as a function of frequency.
Antenna types are 'circular aperture' or 'horn' which require area,
'omnidirectional' or 'dipole', and 'helical'. Omnidirectional antenna
have a fixed gain of 1.5, circular and helical are functions of the
geometry and frequency.
Type AntennaGain to run a demo for a circular aperture. If no efficiency
fields are entered the efficiency is 1, otherwise the terms multiply.
--------------------------------------------------------------------------
Form:
d = AntennaGain; % data structure
g = AntennaGain( d, frequency )
--------------------------------------------------------------------------
------
Inputs
------
d (.) Antenna data structure
.type (1,:) Type string
.area (1,1) Area (circular or horn), m^2
efficiency fields are optional:
.effIllumination (1,1) Illumination efficiency
.effSpillover (1,1) Spillover efficiency
.effSurfaceFinish (1,1) Surface finish efficiency
.effOhmic (1,1) Ohmic losses
.effImpedance (1,1) Impedancy mismatch losses
.eff (1,1) Miscellaneous
for helical antenna:
.n (1,1) Number of turns (helical)
.c (1,1) Circumference (helical)
.s (1,1) Spacing (helical)
frequency (1,:) Frequency (GHz)
-------
Outputs
-------
g (:) Gain (dB)
--------------------------------------------------------------------------
References: Maral, G. and M. Bousquet. (1998) Satellite Communications
Systems. Wiley. pp. 14-17
--------------------------------------------------------------------------
Common: General/StringMatch Common: Graphics/Plot2D
Back to the Link Module page