Frequency Modulation Fundamentals.

Originally a Solution for Eliminating Static.

Beginning in 1923, in Columbia University’s Marcellus Hartley Research Laboratory, in the basement of Philosophy Hall, a driven genius in electronic circuitry named Edwin Howard Armstrong set out to reduce static through the use of FM. After approximately 8 years of toil, Armstrong had a brainstorm and decided to challenge the assumption that the FM transmission bandwidth had to be narrow to keep noise low.

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New Product Releases

Bias Tees

  • Coaxial Bias-Tee, 0.1 dB, 250W, N/SMA, with Heat-Sink, 50Ω
    • ZABT-250W-63+, 420 MHz to 6 GHz
  • Coaxial Bias-Tee, 0.1 dB, 250W, N/SMA, without Heat-Sink, 50Ω
    • ZABT-250W-63X+, 420 MHz to 6 GHz


  • LTCC Coaxial Diplexer, 5.5W, SMA, 50Ω
    • ZDPL-6G-S+, F Low DC to 1.6 GHz – F High 2.4 GHz to 6 GHz
  • LTCC High Pass Filter, 1812, 7W, 50Ω
    • HFCU-223+, 22.8GHz to 39 GHz
  • LTCC High Pass Filter, 1812, 7W, 50Ω
    • HFCU-243+, 5 GHz to 40 GHz

Test Solutions

  • USB & Ethernet Programmable Attenuator, 31.5 dB, 2.92 mm, 50Ω
    • RCDAT-44G-30, 100 MHz to 44 GHz

Together with our suppliers we are constantly working to shorten the time between order and delivery however due to current material shortage lead times for some models are still longer than usual so please take this into account when placing your order.