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thkummi
52 lines
2.3 KiB
C
52 lines
2.3 KiB
C
/*
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Lambda/4 Groundplane Antanna Calculator
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Copyright (C) 2021 Thomas Kummer
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include "groundplane.h"
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void gp_calc(float *f, float *unit_factor, float *lambda, float *l1, float *l2){
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*lambda = ( 29971000 / *f ) / 100;
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*l1 = (0.96 * *lambda * 0.25) * *unit_factor;
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*l2 = (0.96 * *lambda * 0.28) * *unit_factor;
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}
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void gp_print(float *f, float *unit_factor, float *lambda, float *l1, float *l2, int *unit_index){
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printf(" Calculated for %f mHz\n", *f);
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printf("\n");
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printf(" Vertical Radiator %f ", *l1); switch(*unit_index){ case 1: printf("mm\n"); break; case 2: printf("inch\n"); break; };
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printf(" Radials %f ", *l2); switch(*unit_index){ case 1: printf("mm\n"); break; case 2: printf("inch\n"); break; };
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printf("\n");
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printf("\n");
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printf(" O\n");
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printf(" I\n");
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printf(" I\n");
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printf(" Radiator I\n");
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printf(" I\n");
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printf(" I\n");
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printf(" I\n");
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printf(" I\n");
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printf(" ___|___ \n");
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printf(" /' | '\\ \n");
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printf(" \\.__|__./ \n");
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printf(" /| 50 |\\ \n");
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printf(" / | Ohm | \\ \n");
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printf(" Radial / ~~~~~~~~~ \\ \n");
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printf(" / \\ \n");
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printf(" / \\ \n");
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printf("\n");
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printf(" 3 - 6 radials are usual \n");
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printf("\n");
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}
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