design and simulation of circulator and isolator
I also, want to know what is the exact different between circulator and isolator?
it is kind of confusing. can somebody explain me with examples?
also, what is drop-in circulators/ isolators?
Thanks
David Pozar has done just what you asked. Look in his book "Microwave Engineering".
For a simple answer.
A two port circulator is isolator. If you terminate the third port of a circulator with a good load and use it for reverse isolation it is isolator.
usually circulators comes with N or sma connectors , to be connected with cables. A drop in circulator can be directly soldered to PCB/PWB.no connectors.
Regards
GV
hi gvvin,
do N / SMA connector circulator has different design than drop in circulator? Also, did you mean that a circulator can work as an isolator in reverse direction? That means that if I apply power at port 2, the power coming out at port 1 will be less than 20 or 40 dB. That's what I understood. Please clarify my doubt.
Thanks
Hi,
No , Only the size will be smaller and leads will be there to directly mount to PCB.Design will be same using magnets and ferrite material .
A Circulator is a 3-port ferrite device used to route microwave signals from one port to another, Port 1-> Port 2, Port 2 -> Port 3, Port 3 -> Port 1.
An Isolator is basically a circulator with port 3 terminated. It becomes a 2 port device which transmits a signal in port 1 and out port 2. Any reflected energy or any signal entering port 2 will be routed to port 3 where it is absorbed. Thus port 1 is "isolated" from port 2.
Hope this clarifies.
You can search for circulators and isolators from websites.
http://www.rfcafe.com/vendors/compon...ider_links.htm
Regards
GV