程序计算了国产矩形波导BJ-100的传输特性。通过查阅资料可以知道BJ-100波导管的结构参数为频率范围（8.2GHz~12.5GHz）结构参数a=22.86mm,b=10.16mm
FDTD计算
源代码在线查看： ntime
6.920524
7.035866
7.151208
7.266550
7.381892
7.497234
7.612576
7.727918
7.843260
7.958602
8.073944
8.189286
8.304628
8.419971
8.535313
8.650655
8.765997
8.881339
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9.112022
9.227365
9.342707
9.458049
9.573391
9.688733
9.804075
9.919417
10.03476
10.15010
10.26544
10.38078
10.49613
10.61147
10.72681
10.84215
10.95750
11.07284
11.18818
11.30352
11.41886
11.53421
11.64955
11.76489
11.88023
11.99557
12.11092
12.22626
12.34160
12.45694
12.57228
12.68763
12.80297
12.91831
13.03365
13.14899
13.26434
13.37968
13.49502
13.61036
13.72571
13.84105
