How to Use

Paste a list of frequencies (MHz) into the text box at the top, then click Load.

Each frequency becomes a TX source. To switch a source to RX, double-click it.

For each source, select it and add the required elements: circulators, notch filters, pass filters, and pass/reject cavity filters. Each added element will prompt you to enter a frequency or, in the case of an antenna, a height.

Antenna height is entered in meters by default. To enter a height in feet, add ft after the number (for example, 10ft).

Combining Branches

To merge two or three branches, use a T-Connector or 4-Way Combiner, respectively.

First, select the last element in each branch using Ctrl+Click. Then add the appropriate combiner.

Clicking any element in the diagram displays its insertion loss/isolation at all entered frequencies.

Note: Combiner loss is currently modeled as 0 dB, assuming critical-length cables are used rather than a lossy power split. Keep this in mind when interpreting the totals through a T-Connector or 4-Way Combiner.

Running the Full System Analysis

Click Analyze System to run the complete system analysis.

The tool traces every TX branch to its antenna and every RX branch to its antenna. It then calculates and displays three tables in the right-hand panel:

TX-to-TX Isolation
TX-to-RX Isolation
TX-to-CF (Crystal Filter)

Each RX node is assumed to have a CF (Crystal Filter). The CF is not included in the RX-branch isolation calculations; however, TX-to-CF isolation is calculated separately to evaluate protection of the crystal filter.

Advanced Methodology for Comprehensive RF Network Design Validation and Interference Analysis

Validating a multi-channel, co-located low-band RF installation requires looking beyond standalone component specs to analyze complete systemic interactions. When multiple transmitters and highly sensitive receivers share a dense tower framework, cascading individual insertion losses and cross-coupling matrices manually becomes incredibly complex. A comprehensive system simulation is mandatory to guarantee clean spectral hygiene, prevent passive intermodulation (PIM), and eliminate structural receiver desensitization prior to deploying expensive physical hardware.

Modeling Cascading Isolation Matrices and Combining Networks

Modern combiner network architectures rely on precise structural integration. Signals flowing from a transmitter branch pass through single or double ferrite circulators, band-pass cavity resonators, and sharp notch filters before arriving at a T-connector or multi-way star combiner. This validator maps those interconnected component pathways in real time, computing accurate forward loss profiles and directional tracking boundaries.

The analyzer traces every active branch down to its specific antenna node, factoring in critical vertical and horizontal physical spatial displacement parameters to accurately calculate total system attenuation boundaries across all co-site channels simultaneously.

Advanced Protection for Receiver Crystal Filters (CF)

A primary breakthrough in this simulation environment is its independent evaluation of crystal filter protection variables. Every sensitive receiver front-end relies on a specialized crystal filter (CF) to reject intense, off-channel carrier power. If a nearby high-power transmitter leaks excessive out-of-band energy past the primary filtering racks, it can saturate or permanently destroy the receiver's crystal lattice.

By generating independent validation matrices for TX-to-TX, TX-to-RX, and TX-to-CF isolation performance, this dashboard delivers a complete visual health report of your installation. This workflow empowers RF consultants to isolate network vulnerabilities, verify impedance boundaries, and deploy robust, interference-free communications infrastructure.