RF limiters operate over a 0.5-40GHz frequency range

9th March 2015

Siobhan O'Gorman

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Broadband, high power coaxial limiters, designed to protect sensitive low power RF receivers and other microwave circuits in close proximity to high power signals, have been released by Pasternack. Common applications for these RF limiters include electronic warfare, instrumentation, fibre optic communication systems, military communications, radar, SATCOM, point-to-point radio, telecomms, data links and R&D.

The company’s latest release of high power limiters consists of seven designs that provide low leakage power to sensitive control components in the receiver chain while offering good suppression of even-order harmonics under hard limiting. These RF limiters operate over broad frequency range of 0.5-40GHz and provide low leakage power circuit protection of 10-15dBm. This selection of coaxial limiters exhibits high CW power handling of up to 100W peak power and a fast recovery time of 10-100ns.

The high power, broadband limiters from Pasternack help stabilise generator outputs, provide constant amplitude signals in phase sensitive systems and reduce amplitude variation in FM systems. The 50Ω hybrid designs incorporate complete limiting diode circuitry and do not require any external matching components. These microwave limiters offer a guaranteed operating temperature range of -54 to +85°C and are constructed with high-rel, ruggedised packages that are designed to meet MIL-STD-202 environmental conditions for humidity, shock, vibration, altitude and temperature cycle.

“This selection of broadband, high power coaxial limiters offers designers an extensive portfolio of highly reliable models for use in protecting sensitive RF receiver components, in addition to suppressing even-order harmonics under hard limiting conditions,” said Tim Galla, Product Manager, Active RF Components, Pasternack.