DiTom Microwave

Passives, Test and Measurement, RFMW Products From RFMW


DiTom Microwave

Your Expert in High Frequency and Broadband Coaxial Ferrite Isolators and Circulators

DiTom Microwave is a small, minority-owned, AS9100 Rev. C certified U.S. manufacturing company located in Fresno, CA. With over 25 years of experience, DiTom manufactures high quality coaxial ferrite isolators and circulators operating in the frequency ranges of 500 MHz to 40.00 GHz. DiTom has an in-house environmental testing laboratory that includes a Tenney T5STR Environmental Chamber, LDS V830 Electro-Dynamic Shaker, and three Anritsu 37369D VNA’s. This testing equipment is fully qualified and capable to handle high reliability testing needs in a timely manner. All DiTom products are RoHS and REACH compliant.

DiTom supplies components to the defense, aerospace, space, and telecommunications markets with heritage on several programs including:

  • Modernization of Enterprise Terminals (MET)
  • ARMY Phoenix Block 1
  • Fab-T
  • AT&T Autoplex Series 1 & 2
  • Navy CASS (CLS4)
  • GMT
  • Raytheon F-15 Phase 2
  • ELINT CS-3045
  • E2D Advanced Hawkeye
  • Sicral2 – Thermal Vacuum
  • Express AM5 & AM6 – Thermal Vacuum
  • Kazsat-3 – Thermal Vacuum

DiTom's coaxial ferrite isolators and circulators can be found in cellular communication systems, satellite communication transmit and receive modules, line-of-sight communications, radar countermeasures, and broadcast equipment.

DiTom Microwave is currently manufacturing thermal vacuum coaxial ferrite isolators that are capable of operating in environments of less than 5x10-5 torr. All materials used to build TVAC units have successfully passed outgas testing per ASTME 595. More information on DiTom’s TVAC capabilities and history is available upon request.

DiTom Space Capability Flyer


DiTom Selection Guide

DiTom Selection Guide (5.4MB)


Application Notes

Interested in more information on Circulators and Isolators? What they are? How they work? and how they can help solve your system requirement?
See the latest DiTom Application Note


Band / Application Specific Isolators

Model # Frequency (GHz) Isolation Insertion Loss VSWR

Min Max dB  dB
L-Band
D3I0102 1.0 2.0 18 0.5 1.30
S Band
D3I0223 2.0 2.3 20 0.4 1.25
D3I2040 2.0 4.0 18 0.5 1.30
C Band
D3I3742 3.7 4.2 23 0.3 1.15
D3I4080 4.0 8.0 20 0.4 1.25
D3I5771 5.71 7.1 20 0.4 1.25
X Band
D3I6012 6.0 12.0 17 0.6 1.35
D3I7510 7.5 10.0 20 0.5 1.25
D3I7784 7.7 8.4 23 0.25 1.2
D3I8012 8.0 12.4 20 0.5 1.25
Ku Band
D3I1012 10.7 12.75 20 0.5 1.25
D3I1218 12.0 18.0 20 0.5 1.25
D3I1214  12.75 14.5 20 0.5 1.25
Ka Band
D3I1619 16.0 19.0 20 0.5 1.25
D3I1822 17.7 22.0 20 0.5 1.25
D3I1826 18.0 26.5 18 0.8 1.4
D3I2640 26.5 40.0 14 1.0 1.5
D3I2731 27.0 31.0 20 0.6 1.25
Broadband Coaxial Ferrite Isolators – Octave Plus
D3I2060 2.0 6.0 14 0.8 1.5
D3I2080 2.0 8.0 10 1.5 2.0
DMI6018 6.0 18.0 14 1.0 1.5
D3I8020 8.0 20.0 15 1.0 1.45
D3I2004 20.0 40.0 10 2.0 2.0
Broadband Coaxial Ferrite Isolators for LTE – 4G – Cellular – WIFI – WIMAX bands
D3I0780S 0.698 0.800 20 0.4 1.25
D3I0780N 0.698 0.800 20 0.4 1.25
D3I0710S 0.700 1.0 16 0.6 1.4
D3I0710N 0.700 1.0 16 0.6 1.4
D3I0802S 0.800 2.0 14 1.0 1.5
D3I0802N 0.800 2.0 14 1.0 1.5
D3I2060S 2.0 6.0 14 0.8 1.5

"S" designates SMA-F Connectors
"N" designates Type N-F Connectors

Other models and frequency ranges are available through RFMW. We offer a variety of connector options as well as dual junction coaxial components. For more information please contact us at 1-877-FOR-RFMW (367-7369).