Peregrine Semiconductor announced the availability of UltraCMOS PE45140 and PE45450 RF power limiters. These monolithic solutions provide an alternative to discrete, PIN-diode limiters based on gallium arsenide (GaAs), offering repeatable and reliable protection for an assortment of system requirements.
The PE45140 is designed to accommodate the frequency ranges needed in military, land mobile radio (LMR) and radar applications. Specifically, it can protect RF front ends and low-noise amplifiers (LNAs) in LMRs; tactical radio receivers from intentional jammers in military warfare; and transceiver modules in radiolocation, shipborne and air-traffic control (ATC) radar systems.
Designed for higher frequency ranges, the PE45450 can protect RF ports in test and measurement equipment and RF receivers in wireless infrastructure equipment.
Both power limiters feature maximum power handling up to 50 W in a form factor as much as eight times smaller than PIN diode solutions, together with an estimated 40 dB linearity (IIP3) improvement over PIN diode solutions. Performance figures include response and recovery time of less than one nanosecond, and adjustable limiting threshold starting as low as +22 dBm and reaching as high as +35 dBm.
Featuring ESD ratings as high as 8 kV HBM, these programmable RFICs feature two operating modes – power limiting and power reflecting – that can be selected through a low-current analog voltage. In power limiting mode, the device is invisible to the load, and it features very low insertion loss and high linearity. When the incoming RF signal’s power exceeds the programmed threshold, the device limits the input RF power.
In power reflecting mode, the device reflects most of the incident power back to the source. This mode also uses an external power detector to sample the input RF power and toggle operation from power limiting to power reflecting mode for maximum protection.
These power limiters also protect RF ports in unpowered or unbiased conditions.
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