Icom IC-FR3000 Series - Page 25

Duplexer and Isolator Installation
(Reference only)
 Connection
ConnectionConnection
Connection
EXAMPLE 1 : ISOLATOR CONNECTION
EXAMPLE 1 : ISOLATOR CONNECTIONEXAMPLE 1 : ISOLATOR CONNECTION
EXAMPLE 1 : ISOLATOR CONNECTION
PA
ISO
EXAMPLE 2 : DUPLEXER CONNECTION
EXAMPLE 2 : DUPLEXER CONNECTIONEXAMPLE 2 : DUPLEXER CONNECTION
EXAMPLE 2 : DUPLEXER CONNECTION
DUP
RX
J1
PA
25
ISO : ISOLATOR DUP : DUPLEXER
EXAMPLE 2 : DUPLEXER AND ISOLATOR CONNECTION
EXAMPLE 2 : DUPLEXER AND ISOLATOR CONNECTIONEXAMPLE 2 : DUPLEXER AND ISOLATOR CONNECTION
EXAMPLE 2 : DUPLEXER AND ISOLATOR CONNECTION
DUP
RX
J1
PA
ISO
What is a Duplexer?
A duplexer is what allows the antenna to be shared
between transmit and receive.
What is a Circulator/Isolator?
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.
Port 1 Port 2
Circulator
Port 1 Port 2
Isolator
Port 3