sector beam array design
[a, dph] = sector(d, ph1, ph2, N, Astop)
element spacing in units of lambda
passband of angular sector in degrees
number of array elements (even or odd)
stopband attenuation in dB
array weights
transition width in degrees
sector(d, ph1, ph2, N, Astop) can be used for sector beam array design
add sample pgm
This function uses the functions scan.