Matching Network Design Tool

Overview

The Matching Network Design Tool synthesizes RF/MW impedance matching networks to match a (complex) load impedance to a characteristic impedance (typically 50 Ω). The tool supports both one-port and two-port matching configurations.

Features

  • Multiple topologies: L-section, single-stub, double-stub, multisection λ/4, cascaded L-sections, λ/8+λ/4

  • Transmission line implementations: Ideal transmission lines or physical microstrip

  • Two-port matching: Design simultaneous input and output matching networks

Basic Usage

  1. Select the matching topology

  2. Specify the source impedance (Z0)

  3. Define the load impedance (ZL) or reflection coefficient

  4. Set the matching frequency

  5. Configure topology-specific parameters

  6. Generate the matching network schematic

One-Port vs Two-Port Matching

One-Port Matching : Match a single load impedance to the source impedance. Used for antenna matching, filter terminations, etc.

Two-Port Matching : Design input and output matching networks for active devices (amplifiers, mixers). S-parameters may be entered using the tool widgets or a Touchstone file.

Topologies

Topology

Elements

Bandwidth

Complex Loads

Adjustable

L-section

2 lumped

Narrow (5-10%)

Yes

No

Single-stub

1 TL + stub

Moderate (10-20%)

Yes

No

Double-stub

1 TL + 2 stubs

Moderate (10-20%)

Yes

Yes

Multisection λ/4

N×λ/4 TL

Broad (40-80%)

Real only

No

Cascaded LC

2N lumped

Moderate (20-40%)

Real only

No

λ/8 + λ/4

2 TL sections

Moderate (10-20%)

Yes

No

See Also