Vektornätnverksanalysator

Vektornätnverksanalysator, often abbreviated as VNA, is a sophisticated electronic measuring instrument used to characterize the electrical performance of radio-frequency (RF) and microwave components and circuits. It operates by measuring the complex scattering parameters, or S-parameters, of a device under test (DUT). These S-parameters describe how RF signals are reflected by and transmitted through a network. A VNA sends a known RF signal into the DUT and measures the magnitude and phase of the reflected and transmitted signals. By performing these measurements at various frequencies, it can map the frequency-dependent behavior of the DUT.

The primary function of a VNA is to determine parameters such as impedance, reflection coefficient, transmission coefficient, gain, loss, phase shift, and group delay. This information is crucial for designing, testing, and troubleshooting a wide range of electronic systems, including antennas, amplifiers, filters, and transmission lines. Modern VNAs are highly versatile, offering capabilities like time-domain analysis, de-embedding of test fixture effects, and integration with automated test systems. They are indispensable tools in research and development, manufacturing quality control, and field service for the telecommunications, aerospace, defense, and semiconductor industries.