S parameter library provides the S parameter data which could be used in circuit designs.
Below are the details of the procedure for measuring S parameter data, the applied land pattern, the measurement equipment, and the measurement conditions for capacitors.
The measurement procedure is indicated below. The S parameter data is measured with two ports by a Network analyzer and the other equipment.
SOLT and TRL are applied as corrections. SOLT applies Murata’s original land pattern (Short, Open, Load, and Thru) to the lower frequency area.
Meanwhile, TRL uses Murata’s original land pattern (Thru, Reflect, Line, Match) for the higher frequency range.
After soldering the capacitor on the land pattern, we measure it by connecting the equipment with the network analyzer.
In the S parameter data, although the characteristics of the land pattern and measurement equipment are eliminated by correction and electrical delay, the characteristics of the via holes are still included in the measurement . Therefore, the data of the capacitor itself is extracted by eliminating the characteristics of the via holes.
Fig.1 Measurement of S parameter data
The following shows the land patterns which are used in the measurements.
Fig.2 shows the structure of the land pattern.
Fig.2 Structure of Land Pattern
| Material | Glass Epoxy Resin (layer thickness:0.1mm) |
|---|---|
| Land Pattern Material | Copper foil (thickness: 0.035mm), Au plating (thickness: 0.003mm) |
| Microstrip Line | Length:10mm, Width0.9mm |
| Impedance | 20Ω |
| Dimension of land pattern | See Fig.3 |
Fig.3 Dimension of Land Pattern
Listed below is the equipment used in the measurements.
| Network Analyzer | E5061B/E5071C (Agilent Technologies) |
|---|---|
| Measurement jig | PC-SMA (YOKOWO) |
In the measurements, the frequency is classified into a higher range and a lower range.
The proper conditions are applied to each frequency. Fig.1 shows these conditions.
Fig.1 Measurement Conditions
| Types of freq. | Lower Freq. | Higher Freq. |
|---|---|---|
| Network Analyzer | E5061B Agilent Technologies | E5071C Agilent Technologies |
| Range of freq. | 100Hz～10MHz | 100kHz～8.5GHz |
| Correction Kit | SOLT | TRL |
| Connection Mode | Shunt mode | |
S Parameter
