Pasternack Blog

Coaxial rotary joints are necessary inline components when a static RF system must be connected to a rotating RF line. These rotary joints are used in military, aerospace, and commercial applications, most often with rotary antennas and radar. Specifically, coaxial rotary joints are used in Air Traffic Control, image transmissions, medical/industrial, telecommunications control, and ground-, ..

Bias Tees and DC blocks are both low frequency filters designed to pass certain wanted signals and power rails while blocking other signals and limiting the performance impact on RF/microwave circuits. Bias Tees are essentially diplexers with an extremely low crossover frequency, and DC blocks are high pass filters with cutoff frequency down to audio ..

Frequency translation is the backbone of superheterodyne communications and radar circuits, as well as many other useful RF/microwave devices. There is often confusion surrounding these nonlinear devices, specifically the role of mixers, multipliers, and dividers, and how to select the best device for an application. This post aims to briefly describe the similarities and differences, ..

Directional couplers are extremely useful passive RF components capable of extracting a small portion of the energy from the main transmission path, and redirecting it to one, or more, coupled ports. As isolation from the coupled ports to the main transmission path is desirable, directional couplers typically have high isolation among the ports. There are ..