A Circulator is a three-port device where power can be transferred from one port to another while the third port remains isolated. The Port 1 of a Circulator can be considered as a transmit (TX) port, which directly sends the signal to the coupled port. In general, in the coupled port, an antenna is connected, which receives the signal and sends the signal to the receiver (RX) port. A high isolation is required between TX-RX ports. For an Isolator, the third port is terminated with a matched load. Therefore, in terms of the power transfer, the signal can go from Port 1 to Port 2 (full transmission). However, from Port 2 to Port 1 there will be a complete isolation. Tee-junction and Y-junction circulators/isolators are the most used circulators. In a junction Circulator, a ferrite is placed in the middle of the junction, which can be implemented based on various shapes such as (circular, triangular, or hexagonal-shaped ferrite) for the non-reciprocal behavior of the circulator. High-Power Circulators/Isolators are essential in many applications, including telecommunications, military radar systems, and satellite communications. In today’s whitepaper, we will discuss two newly developed High-Power wideband Double-Ridge waveguide Isolators and Circulators covering two different frequency bands. The first component is a Double-Ridge isolator based on the standard WRD350 waveguide dimensions, operating from the 4-8 GHz range with a 2:1 bandwidth ratio. The second component is a WRD200 Circulator design with coaxial interfaces 7/16 (f) operating from 2-4 GHz.
