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Waveguide Components: Circulator

A circulator is often employed directly after the power source in order to protect the magnetron from excessive levels of reflected power. Power reflected back to the magnetron can cause overheating and moding. This can result in reduced efficiency and shortened tube life. The use of an circulator is a good safety precaution to take and becomes increasingly important as the power levels increase.For higher power levels a circulator should be considered a requirement.

Type

Frequency [MHz]

Insertion loss [dB]

Isolation [dB]

Power

forward/reflected

[kW]

Cooling water [°C]

Monitor coupling [dB]

Flange

MW1001B-210DC

2450 ± 25

0.2

23

30 / 15

+15 ... +40

--

WR 430

1200206

915 ± 10

0.15

20

30 / 30

+20 ... +35

60 ± 2

CPR 975

1200020

915 ± 10

0.15

20

75 / 75

+20 ... +35

60 ± 2

CPR 975

1200197

915 ± 5

0.15

23

100 / 90

+30 ± 3

60 ± 2

CPR 975

1200305

915 ± 10

0.20

19

100 / -

+15 … +25

60 ± 2

CPR 975F

MW1001B-260CC

915 ± 10

0.20

19

100 / -

+15 … +25

60 ± 2

CPR 975F

MW1002B-260CC

896 ± 10

0.20

19

100 / -

+15 … +25

60 ± 2

CPR 975F

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