|  | Sci-Wcalc: air_coil_calc 
 air_coil_calc - Single layer air core solenoid inductor analysis
 SYNOPSIS[L, Q, SRF, len_out, fill_out, lmax] = 
air_coil_calc(N, len, fill, AWG, rho, dia, freq, flag)PARAMETERSINPUT PARAMETERS
N
: Number of turnslen
: length of the coil (meters)fill
: ratio of coil length to closewound lengthAWG
: wire size (American Wire Gauge)rho
: resistivity of wire (ohm-m)dia
: inside diameter of coil (meters)freq
: analysis frequency (Hertz)flag
: used to calculate coil length.
 
flag=0 : the length given by len is used.flag=1 : the length is calculated from the wire size,
 number of turns and fill input. OUTPUT VALUES
L
: calculated inductance (Henries)Q
: calculated quality factorSRF
: calculated self resonant frequency (Hertz)len_out
: length used for the analysis (meters)fill_out
: fill used for the analysislmax
: maximum (closewound) inductance DESCRIPTION
Function to analyze the electrical characteristics of a single layer,
uniformly spaced, air core, solenoid inductor.  The physical
dimensions of the coil are given as inputs and the inductance, quality
factor, and self resonant frequency are calculated.
 EXAMPLE // number of turns
N=5;
 // we'll use the fill parameter instead
len=0;
 // the coil is 20% longer than the minimum
fill=1.2;
 // wire size
AWG=22;
 // resistivity of copper (ohm-m)
rho=1.72e-8;
 // 0.25 inches inside diameter
dia=0.25*0.0254;
 // 10 MHz operation
f=10e6;
 // use fill to calculate length
flag=1;
[L,Q,SRF,len_out,fill_out,Lmax] = air_coil_calc(N,len,fill,AWG,rho,dia,f,flag);
disp(sprintf('L=%g nH',L*1e9));
disp(sprintf('Q=%g at %g MHz',Q,f/1e6));
disp(sprintf('Self Resonant Freq=%g MHz',SRF/1e6));
disp(sprintf('Length=%g inches',len_out/0.0254));
disp(sprintf('Fill=%g',fill_out));
disp(sprintf('Lmax=%g nH',Lmax*1e9));
SEE ALSOair_coil_calcair_coil_syn
 coax_calc
 coax_syn
 coupled_microstrip_calc
 coupled_microstrip_syn
 ic_microstrip_calc
 ic_microstrip_syn
 microstrip_calc
 microstrip_syn
 stripline_calc
 stripline_syn
 
 AUTHOR
Dan McMahill
 BUGS
None known
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