PIN diode Vector Modulators -

Fundamentals and Drive Requirements

Rev. V4

Application Note

AN3001

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5

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Figure 5. Phase and Attenuation of MAMDCC0006, Vector Modulator Linearized with

MADRCC0002 Linearizer

1. Tic marks on x,y axes refer to reflection coefficient in increments of 0.1V Reflection coefficients vary from –0.5 to +0.5 on both

the x and y axes.

2. Data is for vector modulators driven by linearizers per attached schematic.

3. Inputs to the linearizers vary from 0 to 5V.

4. The phase with the inputs to both linearizers set to +5V is arbitrarily called zero degrees.

bias 1 = 0.0V

0.5V

1.0V

1.5V

2.0V

2.5V

3.0V

3.5V

bias 1 = 5.0V

bias 2 = 0.0V

0.5V

bias 2 = 5.0V

3.5V

3.0V

2.5V

2.0V

1.5V

1.0V

(y)

90°

(x)

0°

45°

bias 1 = 0V

bias 2 = 0V

bias 1 = 0V

bias 2 = +5V

(y)

90°

(x)

0°

45°

bias 1 = +5V

bias 2 = +5V

bias 1 = +5V

bias 2 = 0V

Reflection

coefficient = 0.5

Loss = 22 dB

Loss = 17 dB

Loss = 12 dB