Added BW equation graphic

magloop.html

@@ -109,6 +109,7 @@
             <img src="MagloopQ.png" alt="magloop antenna Q factor"><br>
             <img src="Vcap.png" alt="magloop antenna capacitor voltage"><br>
             <img src="I_loop.png" alt="magloop antenna loop current"><br>
+            <img src="BW.png" alt="magloop antenna bandwidth"><br>
             <br>
             <b><u>Change history:</u></b><br>
             [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