Power Limiters

Key Features

• Broad frequency range up to 54 GHz maximizes the operating range of your instrument

• High power protection prevents damage by undesired ESD and excess RF power – Exceptional return loss improves calibration accuracy

• Low insertion loss maximizes available power

• Bi-directional utilization eliminates orientation errors

• Integrated DC block provides protection from DC transients

Description

N935x Series of high-performance power limiters are designed for high volume manufacturers and R&D sectors in telecommunications, component test, and aerospace/ defense industries. Keysight Technologies power limiters provide the best broadband input protection from excess RF power, DC transients and ESD, for a variety of RF and microwave instruments and components. For example, the input circuitry of spectrum analyzers, network analyzers, frequency counters or amplifiers can be protected from unintentional inputs up to 3 watts average power. At even greater power levels, failure mode for the limiter is either an open circuit or a short circuit to ground, thereby protecting the instrument from damage.

N9355B and N9356B

The Keysight N9355B and N9356B are 10 MHz to 18 GHz limiters that come with power limiting thresholds of 10 and 25 dBm, respectively. Both versions are furnished with a high-quality male and female Type-N connectors on each side.

N9355C and N9356C

The Keysight N9355C and N9356C are wideband 10 MHz to 26.5 GHz limiters that come with power limiting thresholds of 10 and 25 dBm, respectively. Both versions are furnished with a high-quality male and female 3.5 mm connector on each side.

N9355F

The Keysight N9355F is a wideband 10 MHz to 50 GHz limiter that comes with a power limiting threshold of 10 dBm. It is furnished with a high-quality male and female 2.4 mm connector on each side.

N9355G

The Keysight N9355G is a wideband 10 MHz to 54 GHz limiter that comes with a power limiting threshold of 23 dBm. It is furnished with a high-quality male and female 1.85 mm connector on each side.

Application

Our limiters offer superb low insertion loss and linear operation at low input levels while providing protection against transients or short duration overloads. Typical applications are shown in Figures 1 and 2. In Figure 1, port 2 of an ENA is protected from an inadvertent overload due to high- level signals from the amplifier under test. In Figure 2, the input mixer of a spectrum analyzer is protected from an inadvertent overload due to high-level signals from an antenna.

Keysight limiters also include a DC block integrated into both input and output ports that will block signals below 10 MHz and pass signals up to 54 GHz.

Specifications

Specifications describe the limiter’s warranted performance over the temperature range 0 to +55 °C (except where noted). Supplemental and typical characteristics are intended to provide typical but non-warranted performance parameters. These are denoted as “typical,” “nominal” or “approximate.”