RF Engineering Software

Complex Cascades,
Simplified

CaSSim gives RF engineers a fast, accurate cascade analysis tool — validated against ADIsimRF, priced for real teams.

Download CaSSim Free See Features
±0.15 dB accuracy vs industry reference
22 validated metrics
Rx+Tx full chain analysis
30+ component types

What CaSSim does

Everything your cascade analysis needs

Built by RF engineers for RF engineers. No bloat, no subscriptions you don't need — just fast, accurate cascade math.

📡

Rx & Tx Chain Analysis

Full cascaded NF, IIP3, IIP2, OIP3, P1dB, SFDR, SNR, and ACLR for both receive and transmit chains. Modes switch with one click.

🎯

Industry-Validated Math

Cascade engine validated across 22 metrics on both Rx and Tx reference chains, within ±0.15 dB tolerance against industry-standard tools.

⚡

Visual Chain Builder

Drag and drop components onto the canvas, reorder with a single drag, select multiple and delete together. Real-time results as you build.

📊

Analysis Plots

SINAD vs RSL for Rx chains. Distortion vs Pout for Tx chains with IMD3, IMD2, and operating point markers.

🔬

30+ Component Types

LNA, PA, mixers, IQ modulators, filters, SAW/BAW, switches, attenuators, VVA, phase shifters, couplers, baluns, and more.

💾

Key Parameters Filter

Mode-aware results table — Rx key parameters (Gain, NF, IIP3, IIP2, SFDR) or Tx key parameters (Gain, Pout, OIP3, ACLR) with one click.

Live example

Typical Rx chain

Five components, real cascade math, results in under a second.

LNA
G=15 dB
NF=1.5 dB
BPF
IL=2 dB
NF=2 dB
MIXER
G=−7 dB
NF=7 dB
IF SAW
IL=4 dB
NF=4 dB
VGA
G=10 dB
NF=8 dB
12.0
Gain (dB)
2.04
NF (dB)
−6.93
IIP3 (dBm)
5.07
OIP3 (dBm)
69.9
SFDR (dB)
−57.0
ACLR (dBc)

Why CaSSim

Accurate tools shouldn't cost $10,000/year

Professional RF cascade analysis has been locked behind enterprise pricing. CaSSim changes that.

Capability CaSSim Enterprise Tools ADIsimRF
Cascade NF, IIP3, IIP2, OIP3 ✓ ✓ ✓
Rx + Tx chain modes ✓ ✓ ✓
Visual schematic canvas ✓ ✓ ✗
SINAD & distortion plots ✓ ✓ ✗
Drag-to-reorder chain ✓ ✗ ✗
Works offline, no account needed ✓ ✗ ✗
Free tier available ✓ ✗ ✓
Starting price Free / $49/yr $5,000–$15,000/yr Free (vendor-locked)

Pricing

Pick your plan

All plans include the full cascade engine. Upgrade when you need more.

Basic

Free

For individual engineers exploring cascade analysis.

  • Up to 10 stages
  • Rx & Tx chain modes
  • All 30+ component types
  • SINAD & distortion plots
  • Save/load chains
  • PDF export
  • Monte Carlo analysis
Download Free
Most Popular

Professional

$49 / year

For working RF engineers who need the full toolset.

  • Unlimited stages
  • Rx & Tx chain modes
  • All 30+ component types
  • SINAD & distortion plots
  • Save/load chains
  • PDF report export
  • Monte Carlo analysis
Get Professional

Advanced

$299 / year

For teams and programs that need the complete platform.

  • Everything in Professional
  • Monte Carlo yield analysis
  • AGC chain analysis
  • PDF datasheet ingestion
  • Team license (5 seats)
  • Priority support
  • API access
Contact for Access

Windows Desktop App

Start your first cascade
in under 60 seconds

No account required. No internet needed. Just download, run, and build.

Download CaSSim v1.0

Windows 10/11 · Python 3.10+ · ~15 MB

Get in touch

Questions or early access?

We're a small team building serious RF tools. Reach out and we'll get back to you promptly.