1 // antenna.hxx -- FGRadioAntenna: class to represent antenna properties
3 // Written by Adrian Musceac YO8RZZ, started December 2011.
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 # error This library requires C++
23 #include <simgear/compiler.h>
24 #include <simgear/structure/subsystem_mgr.hxx>
25 #include <Main/fg_props.hxx>
27 #include <simgear/math/sg_geodesy.hxx>
28 #include <simgear/debug/logstream.hxx>
36 /*** load external plot file generated by NEC2. needs to have a txt extension
37 * when naming plots, use the following scheme: type_frequencyMHz.txt
38 * eg: yagi_110.txt or LPDA_333.txt
39 * @param: name of file
42 void load_NEC_antenna_pattern(string type);
48 double _elevation_angle_deg;
55 typedef std::vector<AntennaGain*> AntennaPattern;
56 AntennaPattern _pattern;
60 FGRadioAntenna(string type);
63 /*** calculate far-field antenna gain on a 3D volume around it
64 * @param: bearing to the other station, vertical angle (some call it theta)
65 * @return: gain relative to maximum normalized gain. will be negative in all cases
67 double calculate_gain(double bearing, double angle);
69 /// some convenience setters and getters (unused for now)
70 inline void set_heading(double heading_deg) {_heading_deg = heading_deg ;};
71 inline void set_elevation_angle(double elevation_angle_deg) {_elevation_angle_deg = elevation_angle_deg ;};