Header

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.XHMC28-599- XX.X-X.X26.5 - 40.0WR-28 UG-599/U0.2 dB typ 0.4 dB max 22 dB min 25 dB typ10 watts3 watts
    HMI22-383- XX.X-X.XHMC22-383- XX.X-X.X33.0 - 50.0WR-22 UG-383/U0.2 dB typ 0.4 dB max 22 dB min 25 dB typ10 watts2.5 watts
    HMI19-383- XX.X-X.XHMC19-383- XX.X-X.X40.0 - 60.0WR-19 UG-383/U-M0.3 dB typ 0.5 dB max 21 dB min 24 dB typ10 watts2 watts
    HMI15-385- XX.X-X.XHMC15-385- XX.X-X.X50.0 - 75.0WR-15 UG-385/U0.5 dB typ 0.7 dB max 20 dB min 23 dB typ10 watts1 watts
    HMI12-387- XX.X-X.XHMC12-387- XX.X-X.X60.0 - 90.0WR-12 UG-387/U0.6 dB typ 0.8 dB max 20 dB min 23 dB typ10 watts1 watts
    HMI10-387- XX.X-X.XHMC10-387- XX.X-X.X75.0 - 110.0WR-10 UG-387/U-M0.6 dB typ 0.8 dB max 20 dB min 23 dB typ10 watts1 watts
    HMI8-387- XX.X-X.XHMC8-387- XX.X-X.X90.0 - 110.0WR-8 UG-387/U-M0.8 dB typ 1.0 dB max 16 dB min 19 dB typ10 watts0.75 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 +60C
    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)
    HMI15-385-60.5-7.057.0 - 64.0 WR-15UG-385/U 0.6 dB typ 0.9 dB max 14 dB min 18 dB typ15 dB typ 10 watts1 watt
    HMI12-387-73.5-5.071.0 - 76.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ16 dB typ 10 watts1 watt
    HMC12-387-73.5-5.071.0 - 76.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ16 dB typ 10 watts
    HMI12-387-78.5-5.076.0 - 81.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ16 dB typ 10 watts1 watt
    HMC12-387-78.5-5.076.0 - 81.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ16 dB typ 10 watts
    HMI12-387-83.5-5.081.0 - 86.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ15 dB typ 10 watts1 watt
    HMC12-387-83.5-5.081.0 - 86.0 WR-12UG-387/U 0.6 dB typ 0.9 dB max 16 dB min 19 dB typ15 dB typ 10 watts
    HMC10-387-94.0-4.092.0 - 96.0 WR-10UG-387/U-M 0.5 dB typ 0.8 dB max 18 dB min 21 dB typ16 dB typ 10 watts1 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)

    HFBI Full Band Waveguide Isolators (Faraday-type)
    Waveguide Isolators & Circulators - 18 to 120 GHz
    60 GHz WR-15 Circulator, HMC15-385-60.0-2.0
    71 to 76 GHz Isolator HMI12-387-73.5-5.0
    76 to 81 GHz Isolator HMI12-387-78.5-5.0
    81 to 86 GHz Isolator HMI12-387-83.5-5.0
    Renaissance Electronics 29 - 31.5 GHz Microstrip-compatible Isolator
    Renaissance Electronics Isolators/Circulators
    HXI Company Overview
    Footer Links

    Home | Integrated Assemblies | Digital Radios | HDTV | MMW Products | Customer Service | Careers | Contact |
    Press Releases | Articles | News | Datasheets | Newsletter | History | Technology | Facilities | Mission | Sales | Directions

    HXI 12 Lancaster County Road . Harvard, MA 01451   USA        Tel: (978) 772-7774  Fax: (978) 772-7775     Copyright 2013