Principle of Vector Network Analyzer
A Vector Network Analyzer (VNA) is a precision instrument for measuring the network parameters of radio frequency (RF) and microwave devices. It can simultaneously measure the amplitude and phase information of signals, thereby comprehensively characterizing the linear characteristics of devices.
Instruments and Parameters
- Instrument Model: Keysight N5224A
- Technical Parameters:
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- Frequency Range: 1 MHz to 43.5 GHz
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- 2-port (single signal source) or 4-port (2 built-in signal sources)
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- 127 dB system dynamic range and 132 dB receiver dynamic range
Sample Submission Requirements and Packaging
- Powder or liquid samples: Sample volume ≥ 30 mL, suitable for frequency range 0.5–43 GHz.
- High-frequency parallel plate method: Suitable for 1 MHz–1 GHz.
- Parallel plate sample: Length 50–100 mm, width 50–100 mm, thickness 1–3 mm.
- Coaxial transmission line method:
- For 0.5–18 GHz: Ring-shaped sample with outer diameter 6.9–7 mm, inner diameter 3.0–3.1 mm, thickness 3–5 mm.
- For 18–40 GHz: Ring-shaped sample with outer diameter 2.4 mm, inner diameter 1.0423 mm, thickness 2 mm.
Testing Cases
Reference Standards
- JJF 1495-2014 Calibration Specification for Vector Network Analyzers
- SJ/T 11433-2012 General Specification for Vector Network Analyzers
- GJB 8352-2015 General Specification for Vector Network Analyzers
- IEEE Standard 287 Standard for Precision Coaxial Connectors (DC–110 GHz)
- IEEE 378-1986 Network Analyzers (100 kHz to 18 GHz)
