RF, Microwave & DSP Engineering — From 3D EM Simulation to Measured Hardware
Radix-2 Technologies partners with hardware teams, aerospace/defense groups, and wireless startups to design, simulate, fabricate, and bench-verify custom antennas, microwave filters, RF PCBs, and high-performance signal processing systems.
3D EM & Antenna Simulation
Full-wave 3D electromagnetic simulation of planar, helical (QFH), and dipole antennas, baluns, and shielded RF enclosures to improve first-pass hardware confidence.
Microwave Filters & RF PCB Design
Custom hairpin, interdigital, and radial-stub microwave filters, controlled-impedance Rogers/PTFE stackups, KiCad layout, and rapid prototype bring-up.
SatCom PHY & SDR Signal Processing
LEO Doppler synchronization, Zadoff-Chu & Gold correlators, matched filtering, IQ demodulation, and bit-true Python / C++ / VHDL implementations.
RF Lab Verification & Forensics
In-house real-time spectrum analysis, vector signal generation, high-speed time-domain characterization, SDR/FPGA prototyping, and protocol reverse engineering.
Understand the physics. Build the model. Implement the system. Measure what actually happens.
Unlike generic engineering staffing agencies or simulation-only contractors, you work directly with the Principal Engineer across the complete technical chain—from mathematical formulation and full-wave electromagnetic modeling through software/FPGA implementation, PCB fabrication, and physical laboratory validation.
Featured Engineering Case Study
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Understanding Phase Modulation: An Intuitive Guide to I/Q Data and Carrier Phase Control
From sine-wave carriers and complex baseband (I + jQ) to BPSK, QPSK, QAM, Nyquist pulse shaping, and real-time Costas Loop carrier recovery—an interactive, two-level guide to modern digital radio.
Case Studies & Technical Articles
Full-wave EM simulations, hardware prototypes, S-parameter bench validation, and DSP waveform analyses
Clash of the Telecom Codes: Zadoff-Chu vs. Gold Sequences
If you’ve ever wondered how dozens of cell phones can scream at the same 5G cell tower at exactly the same time without drowning each other out, the answer lies hidden in the mathematics of pseudo-random sequences....
GPS Quadrifilar helix antenna model
A few years ago, I acquired a box of Vaisala RS80-15G radiosondes from eBay. A radiosonde is typically attached to a helium or hydrogen balloon and released into the atmosphere. As it ascends, it measures atmospheric...
Designing and Fabricating a Microwave Microstripline Filter: From HFSS Simulation to PCB Testing – Part 2
In my last post Designing and Fabricating a Microwave Microstripline Filter: From HFSS Simulation to PCB Testing, I designed, simulated and manufactured a Interdigital microstrip bandpass filter for the 5.5 GHz...
Designing and Fabricating a Microwave Microstripline Filter: From HFSS Simulation to PCB Testing
Microstripline filters are essential components in RF and microwave circuits, offering a compact and efficient way to shape frequency response. In this post, we’ll walk through the complete process of designing,...
balanced dipole fed by unbalanced coax
I’ve always wanted to model the effects of a choke balun on a balanced dipole antenna fed by an unbalanced coaxial feed line. In particular, I wanted to model the antenna and feed system using EM software in order to...
How Digital Data Is Transmitted Wirelessly – Part 1
Digital data can be transmitted wirelessly over an analog channel in various ways. Let’s start with an explanation of digital data. Digital data in modern information systems is also known as binary data, which is...
the matched filter – a quick analysis and example
The matched filter is one of the most useful tools available to the Digital Signal Processing (DSP) engineer. Matched filtering maximizes the Signal to Noise Ratio (SNR) of the filter output when a signal matching a...
A z80-based Embedded Design – Hot Tub Heater
The 8-bit Z80 microprocessor has been a popular choice for early computer designs and continues to see some use in embedded systems today. When I was 14 years old, my Dad purchased a Commodore 128 as an upgrade to...
6502 Assembly Language State Machine
In December 1982, Santa delivered a Commodore 64, which became an obsession for me during my childhood and teen years. I quickly discovered that most of the graphic operations I wanted to perform were not possible...
Hacking the Signal from a Remote Control Dog Training Collar – Part 1
I picked up a remote control training collar for our 7 year old Maltese to help train her in order to curb barking. In the spirit of keeping everything humane, we only use two of the three functions (alarm, vibrate,...
Hacking the Signal from a Remote Control Dog Training Collar – Part 2
This is a continuation of a previous post https://radix2tech.com/decoding-an-rf-dog-barking-control-collar/ in which I examined the signal characteristics of a non-branded dog training collar. I purchased an...