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The R&S NRP-Z11, R&S NRP-Z21, R&S NRP-Z22, R&S NRP-Z23, and R&S NRP-Z24 power sensors combine a multipath architecture, multi-diode technology, and a simultaneous-scan multi-channel measurement system into a unique, high-performance concept.
The multipath architecture means combining two or three diode detectors to obtain a large dynamic range of the modulated signal. This is achieved by operating each detector only in the square-law region and using only the optimally driven detector for measurements.
Multiple diodes consist of multiple zero-bias Schottky diodes connected in series and integrated on a single chip. When used in RF detectors, they expand their square-law region because the measurement voltage is distributed among multiple diodes, reducing the amount of drive for each diode while the detection voltages of the individual diodes are added.
Additional Features:
10 MHz - 8 MHz.
200 PW - 200 MW (p/n 1138.)3004.02）
Rohde & Schwarz's patent-pending multipath architecture features 3 signal paths, each with a triple diode.
6 dB wide overlap range for smooth transitions.
Simultaneous scanning and analysis.
Chopping stability of the repetitive signal path.
The advantages over conventional techniques are obvious: high signal-to-noise ratio, low bass braking effect, negligible delay and discontinuity when switching signal paths, and the ability to perform time-domain analysis of the test signal within the available bandwidth. As a result, these sensors not only compete with peak power meters, but even excel in two ways: there is no limit to the RF bandwidth of the test signal.
Greater dynamic range.