PIN diode Vector Modulators -

Fundamentals and Drive Requirements

Rev. V4

Application Note

AN3001

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6

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Figure 6. Phase and Attenuation of MAMDCC0006 vs. Bias Current

1. Tic marks on x,y axes refer to reflection coefficient in increments of 0.1. Reflection coefficients vary from –0.6 to +0.6 on both the x and

y axes.

2. The phase with the inputs to both linearizers set to +15V is arbitrarily called zero.

bias 1 = 0 µA

4 µA

9 µA

17 µA

33 µA

62 µA

112 µA

205 µA

690 µA

2.3 mA

6.7 mA

15 mA

bias 2 = 15 mA

6.7 mA

2.3 mA

690 µA

205 µA

112 µA

62 µA

33 µA

17 µA

9 µA

4 µA

0 µA

(y)

90°

45°

(x)

0°

bias 1 = 0 µA

bias 2 = 0 µA

bias 1 = 15 mA

bias 2 = 0 µA

bias 1 = 15 mA

bias 2 = 15 mA

bias 1 = 0 µA

bias 2 = 15 mA

(y)

90°

45°

(x)

0°

Reflection

coefficient = 0.5

Reflection

coefficient = 0.6