BetaMatch Technical Overview
BetaMatch Technical Overview
Windows based with dockable windows.
Load and save current layouts.
User configurable startup layout.
Included in BetaMatch (Help menu or F1). Displayed in BetaMatch or default browser (user configurable).
1- and 2-port Touchstone files (s1p & s2p-files). For 2-port files select port 1 or 2.
Sample data directly from VNA via the Ethernet port. Tested with Agilent ENA, Rhode & Schwarz (ZVA, ZVB and ZNL models) and Anritsu Shockline. But potentially any VNA that accepts SCPI commands via the Ethernet can be supported.
Launch with simulation data from CST Microwave Studio (via macro in CST MWS and CST DS). Options in CST to select port and to use AR data.
Cascaded network up to 5 components (two shunt components).
Any component(s) in the network can be replaced by an LC resonance circuit.
Preinstalled: Murata, Coilcraft and Ideal Components
Supported: TDK, Taiyo Yuden (requires user installation via the automatic installer).
Individual components in the network can be from any component series.
Any complex impedance can be set by the user.
Impedance can vary with frequency.
Defaults to 50Ω
Port extension and electrical delay. Entered as delay time in ps or electrical length in mm.
Up to five cascaded components with two shunts. Any subset can be optimized.
Optimization will be performed for LC-nets if LC-nets are included in the current matching network (see Matching Network section).
Optimizing is always with respect to minimum accepted power within the frequency bands. The optimizer will select the matching network that has the highest minimum accepted power into the DUT. This means that losses in the matching network are always accounted for.
Up to five non-overlapping frequency bands.
Any complex impedance. Can vary with frequency. Defaults at 50Ω.
Relative weights can be set between frequency ranges. The values are entered as a fourth column in the source editor.
Any frequency band can be set to pass or reject type. For pass types the optimizers tries to maximize the accepted power and for reject bands the accepted power will be minimized.
Optimization can be performed on data and memory1 and/or memory2 simultaneously. This is useful to find a good tradeoff between e.g. different user positions for a mobile device.
Markers & Frequency bands
Markers are indicated as vertical lines in plots with frequency axis and as crosses in Smith Chart.
A marker pair constitutes a frequency band. Pass bands are indicated with a green shadow and reject bands with a red shadow.
Markers can be set to any value by the user.
In addition the most common frequency bands can be selected: LTE, GSM, WCDMA, WIMAS, BT, GPS etc. Where available RX and TX part can also be selected.
Last marker settings will be restored at startup if "Remember marker frequencies" option is set.
Window with plot of tolerance distribution at given frequency (any marker or follow cursor in any plot).
Values are shown for nominal (μ), standard deviation (σ) as well as 2σ and 3σ intervals for Accepted Power and Return Loss. In addition values for a custom interval is displayed.
Tolerance given by vendors for real components.
Ideal inductors and capacitors can be set individually to any tolerance. Default is 5% for both inductors and capacitors.
Component tolerance distributions
Any of Uniform, normal, truncated normal and triangular distributions can be set by the user.
Configurable. Different values can be set for calculations at (default values in brackets): Marker frequency (N=22 500), frequency at cursor (N=10 000) and for plot shadows (N=1000).
Log Mag, Smith Chart, VSWR, Accepted Power, Real part, Imaginary part, Intrinsic Bandwidth, Bandwidth Potential and Q-value.
Data values shown in all plots when moving the mouse in any plot.
User set marker for value in plots. Represented as a line in Return Loss, VSWR and Accepted Power plots. Plotted as circle in Smith Chart plot.
The current value can also be used as half bandwidth value for Intrinsic Bandwidth and Bandwidth potential plots.
Data, Unmatched data, Memory 1 and Memory 2.
Accepted Power: Power delivered from 50Ω source and power delivered into matching network.
Additional plots of data "inside" the matching network. Useful to compare with actual network when soldering.
Plots can be copied or saved. Formats for save: BMP, XBM, XPM, PNG and JPEG.
VNA Connection Option (additional module)
Rhode & Schwarz ZVA, ZVB and ZVL
Anritzu Shockline (defaults to port 5001)
Other VNA that accepts SCPI commands via Ethernet port could potentially work (contact MNW Scan and ask for evaluation license for testing).
1. PC to VNA via Ethernet port (may require cross-over LAN cable depending on PC).
2. Over internal network.
Minimum sweep time is configurable (default is 1 sweep per 0.2s). May be slower due to network and if continous optimization is turned on.
Option to automatically slow down sweep time if trace data does not change. Normal sweep is resumed when data changed.
Optimizes and updates the network for every sweep.
Best 2, 3 or 4 components or fixed topology.
May slow down sweep time (especially for 4 components).
Configurable (default: 5025)
Real 64 (default) or Ascii
A pre-recorded sweep is available for demonstration purposes.
Launch BetaMatch: A macro in CST that exports S-parameter data from current project to BetaMatch. The macro is available in CST MWS or CST DS. BetaMatch will be started if it is not already running
Option to choose port if multiple ports are defined.
Option to use AR-data if present.
Export matching network:
The current matching network can be exported to CST. A new CST DS canvas will be created with the matching network.
The network can be exported as, one individual Touchstone element for each component or as a single Touchstone element representing the whole network. It is also possible to create a network with ideal components of same values.
Option to include the load or export as a 2-port stand-alone network.
If the load is included it is also possible to let BetaMatch create S-parameter task in CST and start an calculation (update) in CST.
BetaMatch Calculations: A result template in CST that performs calculations on current CST projects and return the results to CST.
The returned results can be used to e.g. optimization.
The following settings are available in CST:
Matching with 2 - 5 components, Intrinsic Bandwidth or Bandwidth Potential.
Frequency bands: Up to five bands.
Frequency bands can be set to either pass- or reject type.
Which port to use (when more than one port is available).
Option to use AR-data if available.
For other settings such as component series and source impedance the settings in BetaMatch are used.
Saves the current network as a 2-port Touchstone file (s2p).
Exports current data trace as a textfile table with frequency in first column. Second column can be any of: Return Loss, VSWR, Accepted Power, Intrinsic Bandwidth and Bandwidth Potential.
All, except VSWR, can be exported as either logarithmic or linear data.
A utility to process a directory of Touchstone files. For each Touchstone file in the source directory a text table file will be generated in the target directory.
Possible export formats are: Return Loss, VSWR, Accepted Power, Intrinsic Bandwidth and Bandwidth Potential. All, except VSWR, can be exported as either logarithmic or linear data.
2-port Touchstone files will either be omitted, generate two separate text files or one three-column textfile.
These plots is an aid where data can easily be obtained by reading data at cursor position.
Channel vs Frequency for GSM and WCDMA bands.
Conversion plots: S11 vs VSWR, S11 vs Power, % vs dB, Accepted vs Reflected Power in dB, dBm vs mW in linear and log scales, Radiated Efficiency vs Total Efficiency and Return Loss.
Skin Effect vs Frequency for various materials.
Save as 1-port Touchstone file.
Option to save with or without matching network applied.
Save as 2-port Touchstone file.
Export matching network in different formats to a new CST DS.
The load can be included in the export.
Options to setup S-parameter task and perform update calculations in CST DS.
The network can be exported in following formats:
- Each component is represented as a Touchstone element
- The whole network represented as a single Touchstone element
- Each component replaced with an ideal component of the same value
BetaMatch calculations to CST MWS
Result Template for post processing in CST MWS which sends back optimizer results (lowest accepted power for selected frequency bands). Frequency bands and network topology are set via dialog in CST template.
Results from Intrinsic Bandwidth and Bandwidth potential can also be returned to CST.