Reintroduction to Gunn Oscillators

The semiconductor used in the Gunn oscillator is called the “Gunn diode.” The Gunn diode is a two-terminal “negative” resistance device. The Gunn diode is also referred to as a “Transferred Electron Device” which was invented by J. B. Gunn in 1963. Since its invention, Gunn oscillators have been playing a unique role in replacing … Continue reading Reintroduction to Gunn Oscillators

Which is Better: Simulated or Measured Performance for Simple Antennas?

Measuring antenna pattern and gain accurately is often a challenge. It is not only due to the demand of expensive test equipment, but also the requirement of skilled and knowledgeable workers. In addition, it is impossible to avoid the interactions introduced by the test equipment and test fixtures/equipment holders. Unlike most microwave component testing, antenna … Continue reading Which is Better: Simulated or Measured Performance for Simple Antennas?

Fixed, Level Setting, Direct Reading, and Programmable Attenuators

SAGE Millimeter offers four types waveguide attenuators: fixed, level setting, direct reading, and programmable attenuators. Fixed and Level Setting Attenuators These attenuators are constructed with an E Plane resistive insert in the rectangular waveguide. The operating waveguide mode is TE10. The insertion loss and attenuation of this type of attenuator is frequency dependent. The difference … Continue reading Fixed, Level Setting, Direct Reading, and Programmable Attenuators