ferrite circulator

ferrite circulator

[′fe‚rīt ′sər·kyə‚lād·ər]
(electromagnetism)
A combination of two dual-mode transducers and a 45° ferrite rotator, used with rectangular waveguides to control and switch microwave energy. Also known as ferrite phase-differential circulator.
References in periodicals archive ?
The antenna port feed to the T/R channel usually passes through a ferrite circulator, often with a ferrite isolator to protect the power amplifier, or occasionally with a high power T/R switch that can terminate the receive path with a load during the transmit pulse cycle.
Reliability of a ferrite circulator switch is 0.1 FITS in the spaceflight environment.
Another example is a ferrite circulator, where even modest heating can bring the ferrite above the Curie temperature and disable it.
of Harvard, MA has acquired the ferrite circulator, isolator and attenuator product lines of MCCI Wireless and P&H Laboratories.
The CT-1510-S special series of ferrite circulators is rated at 2 kW average/CW and 10 kW peak power for use in the digital and HDTV UHF television hands.
Ferrite circulators are capable of providing robust performance for typical GaAs X-band applications and can support wide bandgap output power levels.
Contractors and tasks for this thrust are Cascade Microtech, next-generation mm-wave probes, Electromagnetic Sciences Technologies Inc., miniaturized ferrite circulators for MMIC applications; Hittite Microwave, large-scale integration of advanced MMICs for microwave frequency synthesizers; ITT Avionics, low cost common MMIC components for electronic warfare transmitter arrays; Lockheed Martin, Syracuse, NY, high yield mm-wave indium phosphide high electron mobility transistor MMICs and a mm-wave load-pull test station; Lockheed Martin, Baltimore, MD, high indium low cost FET materials on GaAs; and Lockheed Martin, Moorestown, NJ, a 50 W plastic high density interconnect module.
Therefore, for frequencies above approximately 3 GHz, a large DC bias field is required for operation above resonance; for these higher frequencies, most ferrite circulators operate biased below resonance.