Smiths Interconnect|TRAK offers a broad choice of standard junction and differential 4-port waveguide isolators and circulators for applications including commercial marine radar, air traffic control, airborne satellite communications, and space based telecommunications.
Our largest isolators (2200Kg) were produced and supplied for Air Traffic Management systems and are used to this day as part of the SCOT NATS radar system monitoring transatlantic flights paths. The highest power isolator (750W CW) supplied is used as part of the JET fusion experiment while the device that has travelled furthest, several billion km at last count, is still orbiting Saturn aboard the Cassini interplanetary probe.
Device and design choices and trade-offs are governed by a large number of interdependent factors which are used to determine optimal solutions for isolators and circulators.
Smiths Interconnect|TRAK has supplied large numbers of space qualified products offering that span the entire 27-31 GHz operating band. Tending to be optimised for low insertion loss and ease of mechanical integration the range includes, WR28 & WR34 Hybrid Couplers, Terminations, Transitions to 2.9mm, Isolators and Circulators. All isolators feature 6W loads as standard and both isolators and circulators are available with any combination of WR28 and WR34 apertures with standard or custom flanges types.
Waveguide Isolators and Circulators for space applications are at the core of Smiths Interconnect|TRAK’s capability. With each passing year the demand for waveguide devices for space applications grows just as the demands for ever more stringent electrical specifications and higher average power; trends that when taken together with increasing operating frequency and bandwidth create a constant cycle of product development, improvement and technological innovation.
| Operating Band [GHz] | Insertion Loss [dB max] | Return Loss [dB min] | Isolation Loss [dB min] | Notes | |
| WR19 | 47.0 to 52.0 | 0.2 | 23 | 23 | Low Power |
| WR22 | 44.0 to 46.0 | 0.15 | 23 | 23 | Low Power |
| WR28 | 27.0 to 31.0 | 0.15 | 23 | 23 | Any combination of WR28 & 34 |
| WR34 | 27.0 to 31.0 | 0.15 | 23 | 23 | Low Power |
| WR42 | 18.0 to 22.0 | 0.2 | 23 | 23 | Any combination of WR42 & 51 |
| WR51 | 18.0 to 22.0 | 0.15 | 23 | 23 | High and Low power designs |
| WR62 | 17.3 to 18.4 | 0.15 | 23 | 23 | Low Power |
| WR75 | 10.7 to 12.8 | 0.15 | 23 | 23 | High and Low power designs |
| WR75 | 12.7 to 14.5 | 0.15 | 23 | 23 | Low Power |
| WR90 | 8.90 to 10.3 | 0.15 | 23 | 23 | High and Low power designs |
| WR112 | 7.25 to 8.40 | 0.1 | 23 | 23 | Low Power |
| WR137 | 5.70 to 6.70 | 0.15 | 23 | 23 | Low Power |
| WR229 | 3.40 to 4.20 | 0.15 | 21 | 21 | High Power |
| WR229 | 4.40 to 4.90 | 0.15 | 23 | 23 | High Power |
