Attenuator for 170 GHz frequency

[manthan]

hi, everyone.

i need to convert my 10 dbm,170 GHz signal into -1 dbm,170 GHz. so which kind of attenuator is best for me.??

 

[hamster143]

Some kind of obstruction inside the waveguide should suffice, it just has to be properly sized ... but I'm not an expert on millimeter microwaves.

 

[waht]

How are you generating 10 dBm at that frequency?

You must have access to some suberb test equipment. Agilent's millimeter-wave source modules outputs at most -10 dBm at full power in the upper range of D band.

 

[hamster143]

He mentioned a gyrotron in the other post ... MIT has a gyrotron that generates 80 dBm at 140 GHz.

 

[waht]

He mentioned a gyrotron in the other post ... MIT has a gyrotron that generates 80 dBm at 140 GHz.

Such a gyrotron is a huge power hog, and requires strong magnetic fields to operate, probably derived from superconducting magnets. I'm wondering though, how does one without basic knowledge of microwave tech, would get permission to experiment with such a device?

 

[hamster143]

Such a gyrotron is a huge power hog, and requires strong magnetic fields to operate, probably derived from superconducting magnets.

Yeah, 65 kV electron beams, superconducting 5 tesla magnets. And I bet you can fry yourself real easy with 80 dBm of microwaves. But surely there are smaller gyrotrons out there?