28-08-2017, 03:03 PM
A network analyzer is an instrument that measures network parameters of electrical networks. Nowadays, network analyzers commonly measure s parameters because the reflection and transmission of electrical networks are easy to measure at high frequencies, but there are other sets of network parameters such as parameters and, z-parameters Parameters h. Network analyzers are often used to characterize two-port networks, such as amplifiers and filters, but can be used in networks with an arbitrary number of ports.
Network analyzers are mainly used at high frequencies; The operating frequencies can vary from 5 Hz to 1.05 THz. Special types of network analyzers can also cover lower frequency ranges up to 1 Hz. These network analyzers can be used, for example, for the analysis of open loop stability or for the measurement of audio and ultrasonic components.
The two basic types of network analyzers are
• Scalar Network Analyzer (SNA): only measures the amplitude properties
• Vector Network Analyzer (VNA): Measures the properties of amplitude and phase
A VNA is a widely used form of RF network analyzer for RF design applications. A VNA can also be called a gain phase meter or an automatic network analyzer. An SNA is functionally identical to a spectrum analyzer in combination with a tracking generator. As of 2007, VNAs are the most common type of network analyzers, and therefore references to a non-qualified "network analyzer" most often mean a VNA. Three major manufacturers of VNA are Key-sight, Anritsu and Rohde & Schwarz.
Another category of network analyzer is the Microwave Transition Analyser (MTA) or Large Signal Network Analyser (LSNA), which measures both the amplitude and phase of the fundamental and harmonics. The MTA was commercialized before the LSNA, but it lacked some of the easy-to-use calibration features now available with the LSNA.
Network analyzers are mainly used at high frequencies; The operating frequencies can vary from 5 Hz to 1.05 THz. Special types of network analyzers can also cover lower frequency ranges up to 1 Hz. These network analyzers can be used, for example, for the analysis of open loop stability or for the measurement of audio and ultrasonic components.
The two basic types of network analyzers are
• Scalar Network Analyzer (SNA): only measures the amplitude properties
• Vector Network Analyzer (VNA): Measures the properties of amplitude and phase
A VNA is a widely used form of RF network analyzer for RF design applications. A VNA can also be called a gain phase meter or an automatic network analyzer. An SNA is functionally identical to a spectrum analyzer in combination with a tracking generator. As of 2007, VNAs are the most common type of network analyzers, and therefore references to a non-qualified "network analyzer" most often mean a VNA. Three major manufacturers of VNA are Key-sight, Anritsu and Rohde & Schwarz.
Another category of network analyzer is the Microwave Transition Analyser (MTA) or Large Signal Network Analyser (LSNA), which measures both the amplitude and phase of the fundamental and harmonics. The MTA was commercialized before the LSNA, but it lacked some of the easy-to-use calibration features now available with the LSNA.