How to Plot S-Parameters on Android – RF View

Getting Started – 3 Steps

1. Install RF View: Search "RF View" on Google Play → Install (free, 25 MB, Android 6.0+)
2. Get a .s2p file: Download from manufacturer website (SimSurfing for Murata, etc.), export from VNA, or receive via email
3. Open and plot: Open RF View → S-Parameter Plot tab → tap folder icon → select .s2p → instant plot

S-Parameter Plot Tab Overview

  Default view: S11 in dB vs frequency

  Switching views (tap view selector at top):
  - S11 dB: input reflection coefficient
  - S21 dB: forward transmission (gain or insertion loss)
  - S12 dB: reverse transmission
  - S22 dB: output reflection coefficient
  - VSWR: voltage standing wave ratio (from S11 or S22)
  - Phase: S21 or S11 phase in degrees
  - Group Delay: S21 phase derivative (nanoseconds)
  - Smith Chart: S11 or S22 as complex impedance on Smith chart

Adding and Reading Markers

  Single marker:
  1. Tap the marker icon in toolbar
  2. Tap on the trace at any point → marker bubble appears
  3. Shows: frequency + parameter value at that point
  4. Drag to move along the trace

  BW Marker (automatic bandwidth):
  1. Tap marker icon → select BW Marker mode
  2. RF View auto-finds the peak (or valley) and −3 dB crossing points
  3. Displays: f₀, f₁, f₂, bandwidth, Q_L

  Delta Marker (relative measurement):
  1. Set reference marker at one point
  2. Activate Δ mode → move to second point
  3. Shows: Δfreq and Δlevel between two points

Loading Multiple Files for Comparison

  1. Load first file (tap folder icon → select file 1)
  2. Tap "+" button → select file 2 → loads as second trace
  3. Up to 8 files can be loaded simultaneously
  4. Each file gets a unique color
  5. Legend shows filename for each trace
  6. Table Marker: one marker reads all traces simultaneously

Exporting Results

• Export to CSV: tap share icon → "Export CSV" → saves to Downloads
• Take screenshot: phone screenshot (power+volume) captures the plot
• Share file: tap share icon → send .s2p via email, Drive, Dropbox

Related Topics

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