Equation 3.12 can be repeated for a number of points m equal to the numtmr of segments with the observation being done at the middk of the segment (point matching). This will allw equation 3.10 to becorne, N Vin = Umn, m = 1,2..N n=l where, (3.13) From equations 2.35 and 2.43. equation 3.15 can be writbn as( knom'ng that the segmentwidai is A =$ ): for m=n for m # n I - Equation 3.16 is a dosed f m accurate approximation of the self term. Equation (3.17) can be cornputecl numrically as an integral. Onœ the systbm of N linear equations with N unknowns h sofvd, the solution represents the total current on the aiip scatterer (since it is of zero thicknes8). To obtain the cumtnt on the top and bottom surkœ of the strip the following must be used,
- .Ir& = .Zrq + J- Srd = ~î&;-a) where, ii is the nomial vector to the surface E7: is the tangential scattered mgnetic field just above the strip (region 1) II; , is the tangential scattered magneoc fidd just befow the strip (mgion 2) sinœ the geomtry is symmetric Hi=-Hi=K l ~ ~ ~ 1 = 2 x ~ ~ Sinœ H can be computed from equation 3.7. the cumnt density on the top and bottom sufice of the strip can be cornputed. 3.3.2 Code and Rerrub Cornputer code PSTRIP.FOR was created based on the fomiulatim of the previous section. Numerical integraüon was done by Simpson ruk and Crout's mthod was used to solve the N linear equations. Resuîts of surface wrrent densities on strips were plotted to be compared with UTD mu& in saon 3.2.