kopia lustrzana https://github.com/miguelvaca/vk3cpu
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4 Commity
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| Autor | SHA1 | Data |
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miguel
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bb0ed3f40a | |
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miguel
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51c0ac339b | |
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miguel
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6e82732cec | |
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miguel
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67577c8836 |
88
magloop.html
88
magloop.html
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@ -7,7 +7,7 @@
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<link rel="stylesheet" href="magloop.css">
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</head>
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<body>
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<header>Miguel <a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Magloop Antenna Calculator V9</header>
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<header>Miguel <a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Magloop Antenna Calculator V10</header>
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<section class="gridLayoutClass">
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<div class="chart-container" style="position: relative;">
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<canvas id="chartCanvas" class="chartCanvasClass">
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@ -116,6 +116,7 @@
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<li>Q : The antenna Q (quality) factor.</li>
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<li>Ia (A): The RMS loop current in amps.</li>
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<li>Perimeter (λ): Antenna perimeter size relative to the wavelength.</li>
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<li>Skin depth (μm): Conductor skin depth in micrometers.</li>
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</ul>
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<u><b>Usage hints:</b></u>
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<li>Tap on legend items to disable or enable an output parameter. This can be used to declutter the chart.</li>
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@ -134,6 +135,8 @@
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[2]: A. Boswell, A. J. Tyler and A. White, <b>"Performance of a Small Loop Antenna in the 3 - 10 MHz Band"</b> <i>, IEEE Antennas and Propagation Magazine, 47, 2, April 2005, pp. 5 1 -56.</i> <br>
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<br>
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<b><u>Change history:</u></b><br>
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<b>[8-May-23] - V10</b> <br>
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* Added conductor skin depth as a new calculated parameter.<br>
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<b>[23-Apr-23] - V9</b> <br>
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* Changed the frequency list to include VHF (2m) and UHF (70cm) bands.<br>
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* Reduced minimum loop diameter to 4 cm.<br>
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@ -208,6 +211,7 @@
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var shape = "circle"; // Shape of the main loop
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var loop_turns = 1; //
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var loop_mode = "series"; // Series or parallel. When loop_turns_slider.value == 0, loop_turns is 2 and loop_mode is "parallel"
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const mu0 = Math.PI * 4e-7;
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var inductance = 0.0;
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var area = 0.0; // Loop area in square meters.
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@ -309,7 +313,6 @@
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// Calculate the inductance of the coil. For single turn loops, use standard inductance equation. For multi-turn, use Nagaoka correction.
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function getInductance() {
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const mu0 = Math.PI * 4e-7;
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const loop_diameter_meters = loop_diameter_slider.value;
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const cond_diameter_meters = conductor_diameter_slider.value * 1e-3;
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const spacing_ratio = loop_spacing_slider.value;
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@ -480,7 +483,6 @@
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const a_coil_radius = loop_diameter_slider.value * 0.5;
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const b_conductor_radius = conductor_diameter_slider.value * 0.0005;
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const loop_spacing_ratio = loop_spacing_slider.value;
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const mu0 = 4.0 * Math.PI * 1e-7;
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// How much longer is the perimeter compared to the circumference if it were circular:
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const shape_factor = perimeter / (Math.PI * loop_diameter_slider.value);
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@ -505,6 +507,16 @@
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});
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return retval;
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}
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// Returns skin-depth in micrometers:
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function calculateSkinDepth() {
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var retval = [];
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frequencies.forEach(freq => {
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const skin_depth = 1e6 * Math.sqrt(1e-6/(conductivity * Math.PI * freq * mu0));
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retval.push({x:freq, y:skin_depth});
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});
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return retval;
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}
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function calculateEfficiencyFactor() {
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var retval = [];
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@ -626,6 +638,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -646,6 +659,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -665,6 +679,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -684,6 +699,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -703,6 +719,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -722,6 +739,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -770,6 +788,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -809,6 +828,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -846,6 +866,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -885,6 +906,7 @@
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myChart.data.datasets[7].data = calculateQualityFactor();
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myChart.data.datasets[8].data = calculateCirculatingCurrent();
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myChart.data.datasets[9].data = calculateAntennaSize();
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myChart.data.datasets[10].data = calculateSkinDepth();
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myChart.update();
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}
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@ -1611,6 +1633,16 @@
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borderWidth: 1,
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yAxisID: 'sizeID',
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tension: 0.3,
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},
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{
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label: 'Skin depth (\u03BCm)',
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fill: false,
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borderColor: 'rgb(75,75,75)',
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backgroundColor: 'rgb(75,75,75)',
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data: calculateSkinDepth(),
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borderWidth: 1,
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yAxisID: 'skinID',
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tension: 0.3,
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}]
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},
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options: {
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@ -1633,6 +1665,19 @@
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autoSkip: false,
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}
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},
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'mohmsID' : {
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type: 'linear',
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display: 'auto',
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title: {
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display: true,
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text: '\u03A9',
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color: 'red',
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font: {
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weight : 'bold'
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}
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},
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position: 'left',
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},
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'effID' : {
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type: 'linear',
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display: 'auto',
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@ -1684,19 +1729,6 @@
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min: 0.0,
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position: 'left',
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},
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'mohmsID' : {
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type: 'linear',
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display: 'auto',
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title: {
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display: true,
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text: '\u03A9',
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color: 'red',
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font: {
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weight : 'bold'
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}
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},
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position: 'right',
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},
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'pfID' : {
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type: 'logarithmic',
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display: 'auto',
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@ -1781,6 +1813,24 @@
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},
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min: 0.0,
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position: 'right',
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},
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'skinID' : {
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type: 'linear',
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display: 'auto',
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title: {
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display: true,
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text: '\u03B4 \u03BCm',
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color: 'rgb(90,90,90)',
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font: {
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weight : 'bold'
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}
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},
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ticks: {
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beginAtZero: true,
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//max: 0.3,
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},
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min: 0.0,
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position: 'right',
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}
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},
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plugins: {
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@ -1797,7 +1847,7 @@
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callbacks: {
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title: function(context) {
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var value = context[0].parsed.x;
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var lut = {0.1357:'2200', 0.1378:'2200', 0.472:'600', 0.479:'600', 1.8:'160', 1.875:'160', 3.5:'80', 3.8:'80', 5.3:'60', 5.4:'60', 7.0:'40', 7.3:'40', 10.1:'30', 10.15:'30', 14.0:'20', 14.35:'20', 18.068:'18', 18.168:'18', 21.0:'15', 21.45:'15',
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var lut = {0.1357:'2200', 0.1378:'2200', 0.472:'600', 0.479:'600', 1.8:'160', 1.875:'160', 3.5:'80', 3.8:'80', 5.3:'60', 5.4:'60', 7.0:'40', 7.3:'40', 10.1:'30', 10.15:'30', 14.0:'20', 14.35:'20', 18.068:'17', 18.168:'17', 21.0:'15', 21.45:'15',
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24.89:'12', 24.99:'12', 28.0:'10', 29.7:'10', 35.0:'', 40.0:'', 45.0:'', 50.0:'6', 52.0:'6', 54.0:'6', 69.9:'4', 70.5:'4', 144.0:'2', 146.0:'2', 148.0:'2', 420.0:'0.7', 430.0:'0.7', 440.0:'0.7', 450.0:'0.7'};
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var label = '' + value.toPrecision(4).toString() + ' MHz';
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if(lut[value]) {
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@ -1848,6 +1898,10 @@
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} else
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if(label[0] == 'P'){
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label = justifyText("Perimeter: ", value.toFixed(3).toString() + ' ' + '\u03BB');
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} else
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if(label[0] == 'S'){
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var num = getMetricPrefix(value * 1e-6);
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label = justifyText("Skin depth: ", num.val.toPrecision(3).toString() + ' ' + num.pfx + 'm');
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} else {
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label += value.toFixed(3).toString();
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}
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