Isolators & Circulators
- 18 to 110 GHz Product Range
- Compact designs
- Low insertion loss
- 2 GHz standard bandwidth
- Bandwidths up to 9 GHz available above 50 GHz
The HMI and HMC series broadband ferrite junction isolators and circulators are available from 18 – 110 GHz. They utilize a low loss H-plane structure in a modified Y-junction format to provide minimum loss with maximum isolation and bandwidth. 2 GHz bandwidths with 20 dB of isolation are standard for most frequency bands. The bandwidth can be extended to as much as 9 GHz in WR-15 and in higher waveguide bands, with some degradation of insertion loss and isolation.
The isolators are commonly utilized to buffer mismatches and are often used on amplifier and oscillator outputs. Circulators are most commonly employed as signal duplexers on transceivers having a single antenna. The in-line port orientation makes the mechanical interface more accessible than standard Y-junction types. An access pocket in most models allows for blind flange mating without the need for an additional waveguide section.
Specifications @ 35°C TCASE, Specifications subject to change w/o notice.
| Narrowband Isolators and Circulators | ||||||||
|---|---|---|---|---|---|---|---|---|
| Isolator Part Number * | Circulator Part Number * | Center Frequency Range (GHz) | Waveguide | Standard Flange | Insertion Loss (dB) | Isolation (dB) | Forward Power Handling (avg) | Reverse Power Handling (Isolator only) |
| HMI28-599- XX.X-X.X | HMC28-599- XX.X-X.X | 33.0 – 37.0 | WR-28 | UG-599/U | 0.2 dB typ 0.4 dB max | 22 dB min 25 dB typ | 2 watts | 1.5 watts |
| HMI22-383- XX.X-X.X | HMC22-383- XX.X-X.X | 33.0 – 50.0 | WR-22 | UG-383/U | 0.2 dB typ 0.4 dB max | 22 dB min 25 dB typ | 2 watts | 1.5 watts |
| HMI19-383- XX.X-X.X | HMC19-383- XX.X-X.X | 40.0 – 60.0 | WR-19 | UG-383/U-M | 0.3 dB typ 0.5 dB max | 21 dB min 24 dB typ | 2 watts | 1 watt |
| HMI15-385- XX.X-X.X | HMC15-385- XX.X-X.X | 50.0 – 75.0 | WR-15 | UG-385/U | 0.5 dB typ 0.7 dB max | 20 dB min 23 dB typ | 2 watts | 1 watt |
| HMI12-387- XX.X-X.X | HMC12-387- XX.X-X.X | 60.0 – 90.0 | WR-12 | UG-387/U | 0.6 dB typ 0.8 dB max | 20 dB min 23 dB typ | 1.5 watts | 1 watt |
| HMI10-387- XX.X-X.X | HMC10-387- XX.X-X.X | 75.0 – 110.0 | WR-10 | UG-387/U-M | 0.6 dB typ 0.8 dB max | 20 dB min 23 dB typ | 1.5 watts | 1 watt |
| HMI8-387- XX.X-X.X | HMC8-387- XX.X-X.X | 90.0 – 110.0 | WR-8 | UG-387/U-M | 0.8 dB typ 1.0 dB max | 16 dB min 19 dB typ | 1 watt | 0.75 watts |
| *XX.X = Center Frequency in GHz, X.X = Total Bandwidth Around Center Frequency | ||||||||
General Specifications-Narrowband Units
Frequency Bandwidth
- 2 to 3 GHz, WR-28 through WR-22
- 3 to 4 GHz, WR-19 through WR-8
Operating Temperature Range
- 0 to +60°C
Return Loss
- 21 dB typical (1.20:1 VSWR), WR-28 through WR-19
- 19 dBm typical (1.25:1 VSWR), WR-15 through WR-10\
| Wideband Isolators and Circulators | ||||||||
|---|---|---|---|---|---|---|---|---|
| Isolator (HMI) or Circulator (HMC) Part Number | Frequency Range (GHz) | Waveguide | Standard Flange | Insertion Loss (dB) | Isolation (dB) | Return Loss (dB) | Forward Power Handling (avg) | Reverse Power Handling (Isolator only) |
| HMI19-383-49.5-5.0 | 47.0 – 52.0 | WR-19 | UG-385/U-M | 0.4 dB typ 0.5 dB max | 18 dB min 20 dB typ | 19 dB min 20 dB typ | 2 watts | 1 watt |
| HMI15-385-60.5-7.0 | 57.0 – 64.0 | WR-15 | UG-385/U | 0.6 dB typ 0.9 dB max | 14 dB min 18 dB typ | 15 dB typ | 2 watts | 1 watt |
| HMI12-387-73.5-5.0 | 71.0 – 76.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 16 dB typ | 1.5 watts | 1 watt |
| HMC12-387-73.5-5.0 | 71.0 – 76.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 16 dB typ | 1.5 watts | 1.5 watts |
| HMI12-387-78.5-5.0 | 76.0 – 81.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 16 dB typ | 1.5 watts | 1 watt |
| HMC12-387-78.5-5.0 | 76.0 – 81.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 16 dB typ | 1.5 watts | 1 watt |
| HMI12-387-83.5-5.0 | 81.0 – 86.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 15 dB typ | 1.5 watts | 1 watt |
| HMC12-387-83.5-5.0 | 81.0 – 86.0 | WR-12 | UG-387/U | 0.6 dB typ 0.9 dB max | 16 dB min 19 dB typ | 15 dB typ | 1.5 watts | 1 watt |
| HMC10-387-94.0-4.0 | 92.0 – 96.0 | WR-10 | UG-387/U-M | 0.5 dB typ 0.8 dB max | 18 dB min 21 dB typ | 16 dB typ | 1.5 watts | 1 watt |
Requesting quotes
When requesting a quote for HMI and HMC ferrite isolators and circulators, please specify required center frequency, bandwidth and any other required specifications. The part number guide below can be used as a reference for requesting quotes.
Downloads (click to download)
Series HMID Double Junction Isolators
HFBI Full Band Waveguide Isolators (Faraday-type)
Waveguide Isolators & Circulators – 18 to 120 GHz
37.2 to 40.7 GHz WR-22 Ferrite Junction Isolator, HMI22-383-38.95-3.5
47 to 52 GHz WR-19 Ferrite Junction Isolator, HMI19-383-49.5-5.0
60 GHz WR-15 Circulator, HMC15-385-60.0-2.0
71 to 76 GHz Isolator HMI12-387-73.5-5.0
71 to 76 GHz Circulator HMC12-387-73.5-5.0
76 to 81 GHz Isolator HMI12-387-78.5-5.0
76 to 81 GHz Circulator HMC12-387-78.5-5.0
81 to 86 GHz Isolator HMI12-387-83.5-5.0
81 to 86 GHz Circulator HMC12-387-83.5-5.0
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