In communication and radar systems, duplexing is one of the essential functions that allows a single antenna to perform the transmission and receiving tasks at same time. Both circulators and orthomode transducers (OMT) can play this role. The question is: Which device will the designers pick? The circulator is a ferrite based non-reciprocal device. The … Continue reading Duplexing: Circulator or Orthomode Transducer?
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
Unlike 3G or 4G, 5G is not just about the wireless connection between smart phones, computers, and the internet. It is about everything: home appliances, door locks, security cameras, cars, wearables, and many other inert devices. It is about the smart home, the smart office, and the smart city. When fully developed, the 5G wireless … Continue reading 5G and Millimeterwave
Many customers come to us and ask: "What is the insertion loss of SAGE Millimeter’s rectangular waveguide?" It is always a tough question for us to answer, because it is really dependant on the types of materials the waveguide is built with and how the plating is applied. Because of that, we only can offer … Continue reading Rectangular Waveguide Loss
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?
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