I've bought a few 50MHz-6GHz directional couplers (SEDC-10-63+,) each for 75$. Here is a picture of this expensive coupler:

Unfortunately one of these couplers was not working from the beginning so I decided to take the cover off and get a glimpse of the insides.

The problem is I cannot understand what this big black component is (probably a ferrite,) what it does, and how it contributes to the coupling or directivity.

I also wondering if the cover is anything more than a simple cover. The top cover feels like a plastic but sounds like a ceramic object.

##Coupler Inside

##Cover

#Update 1 What does this 1150 component do? connect output to the coupled port? Doesn't this decrease the directivity?

I've bought a few 50MHz-6GHz directional couplers (SEDC-10-63+,) each for 75$. Here is a picture of this expensive coupler:

Unfortunately one of these couplers was not working from the beginning so I decided to take the cover off and get a glimpse of the insides.

The problem is I cannot understand what this big black component is (probably a ferrite,) what it does, and how it contributes to the coupling or directivity.

I also wondering if the cover is anything more than a simple cover. The top cover feels like a plastic but sounds like a ceramic object.

Coupler Inside

Cover

Update 1

What does this 1150 component do? connect output to the coupled port? Doesn't this decrease the directivity?

I've bought a few 50MHz-6GHz directional couplers (SEDC-10-63+,) each for 75$. Here is a picture of this expensive coupler:

Unfortunately one of these couplers was not working from the beginning so I decided to take the cover off and get a glimpse of the insides.

The problem is I cannot understand what this big black component is (probably a ferrite,) what it does, and how it contributes to the coupling or directivity.

##Coupler Inside

I also wondering if the cover is anything more than a simple cover. The top cover feels like a plastic but sounds like a ceramic object.

##Cover

##Update 1 What does this 1150 component do? connect output to the coupled port? Doesn't this decrease the directivity?

I've bought a few 50MHz-6GHz directional couplers (SEDC-10-63+,) each for 75$. Here is a picture of this expensive coupler:

Unfortunately one of these couplers was not working from the beginning so I decided to take the cover off and get a glimpse of the insides.

The problem is I cannot understand what this big black component is (probably a ferrite,) what it does, and how it contributes to the coupling or directivity.

I also wondering if the cover is anything more than a simple cover. The top cover feels like a plastic but sounds like a ceramic object.

##Coupler Inside

##Cover

#Update 1 What does this 1150 component do? connect output to the coupled port? Doesn't this decrease the directivity?

I've bought a few 50MHz-6GHz directional coupler(SEDC-10-63+), each for 75$. Here is a picture of this expensive coupler!

Unfortunately one of these couplers was not working from the beginning so I decided to put the cover up and get a glimpse of inside. The problem is I cannot understand what is this big black component(Probably a ferrite) do And how it contribute to the coupling or directivity

##Coupler Inside  

I also wondering if the cover do anything more than simple a cover. The top cover feels like a plastic but sounds like a ceramic object.

##Cover

##Update 1 What does this 1150 component do? connect output to the coupled port? doesn't this decrese the directivity?

Thanks

I've bought a few 50MHz-6GHz directional couplers (SEDC-10-63+,) each for 75$. Here is a picture of this expensive coupler:

Unfortunately one of these couplers was not working from the beginning so I decided to take the cover off and get a glimpse of the insides. 

The problem is I cannot understand what this big black component is (probably a ferrite,) what it does, and how it contributes to the coupling or directivity.

##Coupler Inside 

I also wondering if the cover is anything more than a simple cover. The top cover feels like a plastic but sounds like a ceramic object.

##Cover

##Update 1 What does this 1150 component do? connect output to the coupled port? Doesn't this decrease the directivity?