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Microwave Engineering
book

Microwave Engineering

by Ahmad Shahid Khan
May 2014
Intermediate to advanced content levelIntermediate to advanced
800 pages
24h 50m
English
CRC Press
Content preview from Microwave Engineering
573Microwave Diodes
Solution
Given E
th
= 3.3 kV/m, L = 15 μm, n
0
= 2 × 10
21
/m
3
, e = 1.6 × 10
19
C,
υ
0
= 2 × 10
5
m/s, A = 4 × 10
8
m
2
,
η
= 0.05 and M = 4
In view of Equation 13.27
P =
η
(M E
th
L) (n
0
e
υ
0
A) = 0.05 (4 × 3.3 × 10
3
× 15 × 10
6
)
× (2 × 10
21
× 1.6 × 10
19
× 2 × 10
5
× 4 × 10
8
)
= 25.344 mW
EXAMPLE 13.6
Calculate the avalanche multiplication factor (M) if the applied voltage
V = 100 V, avalanche breakdown voltage V
b
= 200 V and numerical factor
for silicon is n = 5.
Solution
Given V = 100 V, V
b
= 200 V, n = 4
In view of Equation 13.29
M = 1/{1 (V/V
b
)
n
} = 1/{1 (100/200)
4
} = 1/{1 (0.5)
4
} = 1.067
EXAMPLE 13.7
Calculate the critical voltage of a BARITT diode if the relative dielec-
tric constant of silicon
ε
r
= 11.8, donor co
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Publisher Resources

ISBN: 9781466591417