Smith Chart Studio
A full interactive Smith chart with a built-in tutor. Drag the reflection point, watch Z, Γ and SWR stay in sync, then work through seven lessons up to L-network matching.
I really
love waves.
Radio, microwaves, light — same equations, different wavelengths. I study them at the University of Tehran and aim them deep into the brain, no scalpel needed.
01 Curriculum Vitae
DOC. HK-CV · REV 2026.09 · SHEET 1 OF 1
Education
B.Sc. in Electrical Engineering — University of Tehran
Sep 2022 – Sep 2026
Faculty of Electrical & Computer Engineering · Ranked #1 in Iran, QS World University Rankings 2026
GPA 18.17 / 20 · ranked 13th of 128 — top 10% of cohort
Thesis: Improving Spatial Focality in Temporal Interference Deep Brain Stimulation via Phase Modulation — supervised by Prof. Hoda Ameri · jury Prof. Amideddin Mataji-Kojouri · grade 20/20
SELECTED COURSES
- Filter & Circuit Synthesis 20/20
- Engineering Mathematics 20/20
- Linear Control Systems 20/20
- Electronics II 20/20
- Microwave I 19.8/20
- Signals & Systems 19.74/20
- Microwave Lab 19.54/20
- Antenna I 19.5/20
- Wireless Communications 19.4/20
- Electric Circuits I 19/20
- Principles of Communication Systems 18.8/20
- Electronics I 18.5/20
- Communication Circuits 18.5/20
- Electromagnetics 18.26/20
- Fields & Waves 18.1/20
- Electromagnetic Compatibility (EMC) 17.75/20
Research experience
Bioelectromagnetics Laboratory — University of Tehran
Jun 2025 – Nov 2025
Undergraduate research intern · Profs. R. Faraji-Dana, H. Ameri & A. Mataji-Kojouri
- Developed a non-invasive deep brain stimulation technique that targets deep neural circuits without surgical implants.
- Proposed PM-TI, a phase-modulated temporal-interference method that reduces unintended stimulation spread by ≈70%, sharpening spatial focus.
- Simulated electric-field distributions in biological phantoms with COMSOL Multiphysics to validate the focused hotspot.
- Built a 2-channel high-precision current source (enhanced Howland architecture) to generate the stimulation signals in hardware.
- Co-authored the PM-TI methodology paper, accepted at ICEE 2026.
Publications
- H. Keshtkar, M. Moltamesi, H. Ameri, A. Mataji-Kojouri, R. Faraji-Dana, “Spatial Focusing of Temporal Interference Deep Brain Stimulation via Phase Modulation,” 34th Int. Conference on Electrical Engineering (ICEE), 2026. accepted — pending IEEE indexing
- M. Moltamesi, H. Keshtkar, et al., “Seizure Suppression in a Neural Mass Model via Input–Output Feedback Linearization and Backstepping Control,” 34th Int. Conference on Electrical Engineering (ICEE), 2026. accepted — pending IEEE indexing
Honors & awards
- Top 0.5% nationwide in Iran's university entrance exam (Konkur, Math & Physics) among 146,000+ participants — 2022.
- Ranked 13th of 128 in the electrical engineering cohort.
- Exam-exempt admission to the M.Sc. program at the University of Tehran, reserved for top-ranked undergraduates.
Teaching assistant
| Fields & Waves | Prof. Reza Faraji-Dana | University of Tehran | Fall 2026 |
| Electromagnetics | Prof. Hoda Ameri | University of Tehran | Fall 2025 |
| Electromagnetics | Prof. Asghar Keshtkar | Imam Khomeini Int. University | Fall 2025 |
| Electric Circuits I | Prof. Moein Abedini | University of Tehran | Fall 2024 |
Skills
MATLABPythonCVerilog HDL
COMSOL MultiphysicsAnsys HFSSAnsys MaxwellADSNI MultisimArduino
Languages
- English — professional working proficiency · TOEFL iBT 100/120 (bands out of 6: L 6.0 · S 5.0 · R 4.5 · W 3.5) · CEFR C1 · tested May 2026
- Persian — native
02 Lab
Instruments I've built. Not screenshots — every preview here is running live; each one opens in its own tab.
PM-TI — the pitch
My thesis in five minutes, told as a scroll: deep brain stimulation without the surgery, and one knob k that shrinks the hotspot by two thirds in simulation and by more than half on the bench.
NEXT INSTRUMENT
On the bench. This slot is reserved — the lab is never finished.
03 Writing
Long essays on the things I keep circling back to. Same rule as the Lab — every figure is live and you can break it, nothing here is a screenshot.
AM Modulation 2026
A microphone gives you a signal that swings a few thousand times a second. A radio wave that can cross a city swings a few million. Modulation is how you get the first one to travel on the second — and amplitude modulation is the simplest way to do it.
Why sound cannot be sent as sound, how the carrier takes the shape of the message, where the sidebands come from, why two thirds of the power is wasted, and how a diode and two passive parts get the message back. Plain English, nothing assumed beyond a sine wave.
Folding infinity into a circle 2026
Almost every engineering student is a little scared of the Smith chart — it looks like a dartboard left out in the rain. It isn't hard. A bored Bell Labs engineer drew it in 1939 to stop doing the same arithmetic every day, and every radio instrument built this year still puts his circles on the screen.
The story of how an infinite plane gets folded down to the size of a coin, why the grid lines survive the fold, and why software never managed to kill it. No RF background needed — every term gets explained the first time it shows up.
NEXT ESSAY
In the drafts. This slot is reserved — there is always a next one.
04 Contact
Three ports, all matched — your message won't reflect back.