- Notes:
- The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop") + Notes:
The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop") antenna, given physical dimensions entered via slider widgets. It assumes the main loop is made from a round anodised copper or aluminium conductor. I developed this multi-turn capable magloop calculator to take advantage of the touch-screens and high-speed of modern mobile phones, to allow users to get realtime feedback of the predicted @@ -112,6 +111,8 @@
Change history:
+ [16-Sep-21] : Updated equation used for Q to match the one use in the ARRL Antenna Book. Changed to V4. This will affect predictions for V_cap, I_loop and BW. Based on reading + "Impedance, Bandwidth, and Q of Antennas" by A D Yaghjian, IEEE Transactions on Antennas and Propagation, April 2005.
[16-Sep-21] : Added equation graphics for V_cap and I_loop formulas.
[12-Sep-21] : Set maximum values to Q, Vcap and I axes to stop autoscaling. Max Q set to 2000, Vcap to 20 kV and I to 100 A.
[12-Sep-21] : Added formula/equation graphics in Notes section. A few more complex ones, such as effective capacitance and SRF, are still needed.
@@ -344,7 +345,7 @@ const Xl = inductiveReactance(frequency); const Rl = lossResistance(frequency); const Rr = radiationResistance(frequency); - const Q = Xl / (Rl + Rr); + const Q = Xl / (2.0 * (Rl + Rr)); return Q; } @@ -1020,7 +1021,7 @@ }, ticks: { beginAtZero: true, - max: 20.0, + max: 10.0, }, min: 0.0, position: 'left', @@ -1075,7 +1076,7 @@ }, ticks: { beginAtZero: true, - max: 3000.0, + max: 1800.0, }, position: 'right', id: 'qID'
- The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop") + Notes:
The Magloop Antenna Calculator was developed to predict the characteristics of a small-loop (aka "magnetic loop" or "magloop") antenna, given physical dimensions entered via slider widgets. It assumes the main loop is made from a round anodised copper or aluminium conductor. I developed this multi-turn capable magloop calculator to take advantage of the touch-screens and high-speed of modern mobile phones, to allow users to get realtime feedback of the predicted @@ -112,6 +111,8 @@
Change history:
+ [16-Sep-21] : Updated equation used for Q to match the one use in the ARRL Antenna Book. Changed to V4. This will affect predictions for V_cap, I_loop and BW. Based on reading + "Impedance, Bandwidth, and Q of Antennas" by A D Yaghjian, IEEE Transactions on Antennas and Propagation, April 2005.
[16-Sep-21] : Added equation graphics for V_cap and I_loop formulas.
[12-Sep-21] : Set maximum values to Q, Vcap and I axes to stop autoscaling. Max Q set to 2000, Vcap to 20 kV and I to 100 A.
[12-Sep-21] : Added formula/equation graphics in Notes section. A few more complex ones, such as effective capacitance and SRF, are still needed.
@@ -344,7 +345,7 @@ const Xl = inductiveReactance(frequency); const Rl = lossResistance(frequency); const Rr = radiationResistance(frequency); - const Q = Xl / (Rl + Rr); + const Q = Xl / (2.0 * (Rl + Rr)); return Q; } @@ -1020,7 +1021,7 @@ }, ticks: { beginAtZero: true, - max: 20.0, + max: 10.0, }, min: 0.0, position: 'left', @@ -1075,7 +1076,7 @@ }, ticks: { beginAtZero: true, - max: 3000.0, + max: 1800.0, }, position: 'right', id: 'qID'