The CMD837 1.0 GHz to 18.0 GHz highpass / lowpass diplexer is an ideal solution when RF modulation or DC injection is essential. Each of the channels is comprised of a seven section Chebychev filter. The individual filters are diplexed to provide for a common port that passes DC to 500 MHz and 1.0 GHz to 18.0 GHz. The low frequency port allows for injection of a DC to 500 MHz bias, or control signal onto the 1.0 GHz to 18.0 GHz band. The diplexing function of the filter provides -30 dB of isolation channel to channel.

  • Size: 1.50” L x 0.80” W x 0.50” H
  • Lowpass Range: DC - 500 MHz
  • Highpass Range: 1.0 GHz - 18.0 GHz
  • Return Loss: -10 dB min (Highpass and Lowpass)
  • Insertion Loss: 1.25 dB (Highpass)
  • Allowable current: 100 milliamps at 12 Volts

Low Channel (DC Bias/Injection Band)

  • DC – 500 MHz

High Channel (RF Band)

  • 1.0 – 18.0 GHz

Insertion Loss

  • 0.7 dB max (DC – 500 MHz)
  • 1.25 dB max (1.0 – 18.0GHz)

High to Low Channel Isolation

  • -30dB min DC – 500 MHz

Low to High Channel Isolation

  • -30dB min 1.0 – 18.0 GHz

Return Loss

  • DC – 500 MHz -10.0 dB min
  • 1.0 – 18.0 GHz -10.0 dB min


  • 1.50” L x 0.80” W x 0.50” H


  • 50Ω


  • SMA Female

Operating Temperature

  • -40° to +70°C

Recent Events

May 22, 2018 (All day) - May 24, 2018 (All day)
Join the Emcon team at NITEC 2017 as they showcase the latest developments in TEMPEST, rugged, and high security IT solutions for the government marketplace. Innovation has become more global, more rapid, and more concentrated in the private sector, where more commercial technologies than ever before have military applications. Panelists at NITEC will address these trends in depth; discuss how they are giving rise to new models of collaboration between defence organizations and Industry; and explore the implications for NATO.
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