Waveguide problem for a full hexagonal guide

; Copyright 1998, by the University of California. 
; Unauthorized commercial use is prohibited. 

&reg kprob=1,                ; Superfish problem
conv=2.54                    ; Dimensions are inches
icylin=0                     ; Cartesian coordinates
; Uncomment only one of the following lines to find a mode
freq=377.0                   ; Starting frequency for mode 1
;freq=620.0                  ; Starting frequency for mode 2
;freq=788.0                  ; Starting frequency for mode 3
;freq=940.0                  ; Starting frequency for mode 4
dx=.3,                       ; Mesh interval
nbsup=1,                     ; Neumann boundary condition at upper edge
nbslo=1,                     ; Neumann boundary condition at lower edge
nbslf=1,                     ; Neumann boundary condition at left edge
nbsrt=1,                     ; Neumann boundary condition at right edge
xdri=4,ydri=1  &             ; Drive point coordinates

&po x=-10, y=0.0 &
&po x=-5,  y=-8.66025 &
&po x=-1,  y=-8.66025 &      ; This small perturbation removes degeneracy
&po x=-0.3,y=-8.33 &       
&po x=0.3, y=-8.33 &
&po x=1,   y=-8.66025 &      ; End of small perturbation 
&po x=5,   y=-8.66025 &
&po x=10,  y=0.0 &
&po x=5,   y=8.66025 &
&po x=-5,  y=8.66025 &
&po x=-10, y=0.0 &