Microwave Components » Exercise – 1
3. Which is not a typical application of a ferrite in a microwave system ?
(a) attenuator
(b) amplifier
(c) isolator
(d) circulator
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In waveguide, a two-hole coupler, two waveguides share a broad wall. The holes are 1/4 wave apart. In the forward case the coupled signals add, in the reverse they subtract (180 apart) and disappear. Coupling factor is controlled by hole size.