28
G. Chandra Ghivela and J. Sengupta
Table 4 Space charge effects on performance of Si IMPATT
Frequency (in THz)
R sc
(Ohm)
V a /V d
Ratio
Disturbances in V D (×10 −13 )
01
10.235
0.215
6.231
02
9.215
0.212
5.758
04
9.105
0.205
5.264
06
8.856
0.203
5.120
08
8.231
0.198
4.875
10
7.952
0.194
4.652
12
7.253
0.178
4.253
14
7.015
0.165
3.878
16
6.958
0.160
3.261
18
6.235
0.148
3.120
20
5.605
0.123
2.958
22
5.234
0.112
2.458
24
4.235
0.105
2.154
26
4.231
0.098
1.956
28
3.268
0.085
1.685
30
2.854
0.074
1.521
Table 5 Space charge effects on performance of GaAs IMPATT
Frequency (in THz)
R sc
(Ohm)
V a /V d
Ratio
Disturbances in V D (×10 −13 )
01
8.212
0.182
5.875
02
8.104
0.176
5.452
04
7.658
0.164
5.102
06
7.241
0.161
4.981
08
7.011
0.154
4.422
10
6.869
0.148
4.105
12
6.456
0.142
3.562
14
6.123
0.137
3.231
16
5.944
0.131
3.008
18
5.754
0.124
2.992
20
5.428
0.119
2.887
22
5.107
0.110
2.452
24
4.981
0.095
2.098
26
4.782
0.089
1.922
28
4.548
0.083
1.522
30
4.213
0.069
1.447