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Handiko Gesang

RF Specialist

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About Me

I work primarily as a RF Engineer/RF Specialist who designed board-level RF Circuits for HF to Low-UHF range (3 MHz - 470 MHz). Occasionally, I posts articles on my website.

Experience

PT. Multidaya Teknologi Nusantara (eFishery)

Electrical Hardware Engineer

Doing some research and development for the power path current sensor monitor algorithm to improve accuracy of the current reading and to improve bussiness aspect of the company.

Production House - PT. Datto Asia Teknologi

Lab. Technician

Building an SDR (Software Defined Radio) application using GNU Radio and a low-cost SDR hardware for receiving and decoding Radio Telemetry from Mt. Merapi, DIY.

YE2A Contest Team

Technical Team

Help designing new antenna system as required and designing new hardware to manage radio hardware automation.

Sensor and Telecontrolling Systems Lab.

Lab. Assistant

Create lab works modules, performing as an Instructor and Coordinator, and did several projects on Radio Telemetry and HF/VHF/UHF Radio Communication.

Production House - PT. Datto Asia Teknologi

Student Intern

Evaluating VHF/UHF RF Path performances between Klaten and Nglanggeran site.

Sensor and Telecontrolling Systems Lab.

Research Team - RHAN-122B Test Rocket

Building telemetry receiver system for recording the telemetry signal from RHAN-122B Test Rocket using BladeRF SDR and GNU Radio. This event is joint research of LAPAN, PT. Pindad, Kemenristekdikti, TNI-AD, and Universitas Gadjah Mada.

Universitas Gadjah Mada

KKN-PPM-UGM 2015 - Public Service

Public service activity at Kec. Dukun, Muntilan, Central Java.

Techno Antenna Fair 2013

Chairman of the Committee

Coordinating the committee to host the 2013 - Techno Antenna Fair Competition.

Education

Universitas Gadjah Mada

Bachelor of Engineering in Engineering Physics

GPA: 3.06 Final Assignment: Design and Development of the Multi Mode Simultaneous Multi Channel Modulator Based on Software Defined Radio.

Projects

Development Board (Mini Control Box) for Firmware and Apps Design

Creating a mini development board (control box) which consists of a microcontroller, WiFi module, RTC, SDCard, and I/O Interface to design and develop new firmware and apps for eFishery.

closed project

Developing a Set of Algorithms to Process Sensor Data

Developing a new Set of Algorithms to process and extract useful sensor data from the eFishery power path current sensor. These data will be used to improve feeding accuracy and support bussiness aspects of the company.

closed project

USB Flasher

Creating a USB Flasher to download test firmware into eFishery control box (Atmel uC and ESP SoC).

closed project

APRS Tracker using an Arduino & Dorji VHF module

Creating APRS (Automatic Packet Reporting System) for sending GPS telemetry from a moving vehicle using Arduino & Dorji VHF radio module. The vehicle moving paths are received by an internet gateway and displayed on www.aprs.fi

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VHF/UHF Telemetry Shield for Arduino

Creating an Arduino UNO Shield which hosts a Dorji DRA818V/U radio transceiver module used as a GPS Telemetry sender (APRS tracker module).

View Project

RF Jammer Using ESP12 & AD9851 DDS Module

Creating an RF Jammer using ESP12 & AD9851 DDS Modules which can be controlled over the internet via MQTT protocol.

View Project

MMIC VHF Low Noise Amplifier

Creating a VHF Low Noise Amplifier module which offers Transmit bypass capability (up to 1 kW of transmitting power), input protection by means of a Bandpass Filter, and Low Noise Figure MMIC PGA-103.

View Project

iBeacon using a JDY-08 BLE module

Creating an iBeacon using a low-cost BLE (Bluetooth Low Energy) module JDY-08 and an Arduino. The UUID string, major, and minor numbers are reconfigurable.

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Arduino RFpainter - Abusing FMCW to Paint Cats on Your RF Spectrogram

Implement FMCW (Frequency Modulation Continuous Wave) to draw some funny pictures on your RF Spectrogram. Wave generation is done using a DDS AD9851 module and Arduino UNO.

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Receiving and demodulating Russian weather satellite signal

Performs a reception, demodulation, and decode Russian weather satellite signal (Meteor-M2 Low Rate Picture Transponder) using a low-cost Software Defined Radio dongle and GNU Radio Software.

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AD9851 - DDS Module Controller Library for Arduino

Create a C library for Arduino to control low-cost AD9851 based DDS module frequency synthesizers. This library gives user flexibility to choose the preferred Arduino GPIOs to perform the required tasks. Tested on Arduino UNO & DUE with AD9851 DDS modules 30MHz oscillator.

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Receiving and demodulating a Radio Transmission from Seoul South Korea

Performs reception and demodulation of a Radio Transmission from Seoul South Korea (HLG Station) on the HF spectrum (about 8,5 MHz). The transmission is related to the maritime communication which used by the commercial vessels.

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gr-Merapi - An SDR Application for decoding Mt. Merapi Telemetry

Create an SDR (Software Defined Radio) application for receiving, decoding, and uploading UHF Radio Telemetry from Mt. Merapi, DIY, using a low-cost SDR dongle and GNU Radio software.

View Project

4 Elements VHF Yagi Antenna

Design and built a 4 element VHF Yagi Antenna for 144.3 MHz. This antenna won the Techno Antenna Fair 2014 & 2015 for Directional Antenna Category.

View Project

Other Projects

This is the list of my other projects which hosted in GitHub. As I progresses along, the list will be periodically updated.

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Honors

My National and International Honors during the time which I very active on Amateur Radio DX Contest activities.

See honors

MyBlog

My blog entries about projects which are i host in my github repos. The entries are slowly added and updated based on the project which undergo.

Visit blog

Skills

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