Application Notes & Tech Notes

  1. Disconnecting The Dots: Stellar Constellations With Stellar Connectorized Parts 8/2/2023

    Marki showcased a mmWave up- and down-conversion chain using a fully coaxial connectorized lineup operating at 81GHz, demonstrating the power and flexibility of their 1.0mm connectorized product family at IMS 2023.

  2. Using The MMIQ-0218 As A Vector Modulator 3/13/2023

    The proper way to apply a DC current to the mixer is through a bias tee, allowing the high-frequency output from the mixer to absorb rather than reflect back into the mixer, potentially causing ripple or other degradation to the performance of the IQ mixer as a vector modulator.

  3. LO To RF Isolations: Why A 10dB Buffer Is Best 3/13/2023

    The LO to RF isolation of a mixer is a critical performance specification in most broadband applications. LO feedthrough can not only contaminate a system, but the noise fed from the LO path can degrade a system’s noise figure. 

  4. Near-Zero Spike Leakage Of Marki Schottky Diode Limiters 3/9/2023

    GaAs Schottky diodes in Marki Microwave limiters are created on a THz process, allowing them to switch on and off at incredibly high speeds. This, combined with novel circuit designs, allows us to offer devices with virtually zero spike leakage and nearly immediate recovery times.

  5. Recovery Time Of GaAs Schottky Diode Limiters 3/9/2023

    Discover how limiters safeguard circuits in Tx/Rx systems while mitigating self-jamming issues, with a spotlight on cutting-edge GaAs Schottky diode technology.

  6. How It’s Made: Optimal SMT Launches For QFN Packaged MMIC Filters 3/9/2023

    In this tech note, we will break down surface-mount packaging parasitic sources and present solutions to combat these undesirable parasitics.

  7. A Practical Guide To Noise In Frequency Conversions 2/17/2023

    When RF engineers encounter noise figure problems with the receiver, they can mistakenly conclude that the mixer is not performing properly. In this article, we will illuminate potentially overlooked noise sources in a typical converter.

  8. How Do Amplifiers Affect Signal Phase Noise? 2/17/2023

    Phase noise is critical to systems requiring precise frequency stability. In extremely low phase noise systems, the amplifier phase noise contribution is considered in the signal chain’s phase noise performance

  9. Debugging Surface Mount Footprints With Time-Domain Reflectometry 2/17/2023

    Without a means to determine fault locations with the naked eye, Time-domain reflectometry (TDR) proves a powerful tool in visualizing impedance types and variations on a microstrip.

  10. Marki’s MMIC Filters are Hot, Hot, Hot! 2/16/2023

    GaAs MMIC filters offer the best combination of performance, cost, and consistency – recent testing further indicates that these filters maintain consistency with low variability over temperature and high power handling capabilities.