Work Experience/Projects
Work Experience
24 June 2020 – Continuing, Institute of Materials Science and Nanotechnology, Graduate Researcher in Antennas and RF, Ankara
- Working on RF-engineered optically transparent metasurfaces.
- Designing antennas and testing with VNA in the chamber room.
- Using simulation tools HFSS, and CST MWS for antennas, and metasurfaces.
- Designing equivalent circuit models using Keysight ADS.
- X-band waveguide measurements to determine permittivity of dielectric materials.
5 May 2021 – Continuing, freelancer.com, Part Time Antenna Design Engineer, Remote
- Prepared a report on small metasurfaces-based RF rectennas.
- Designed patch antennas and prepared a report on 3D antenna fabrication methods.
- Designed bow-tie antennas with full-ground and partially-ground cases.
- Designed a PIFA antenna for human body applications.
22 Sep 2022 – 8 Nov 2022, DUJUD LLC, Part Time Antenna Design Engineer, Remote
- Simulated Vivaldi and SIW horn antenna using CST and HFSS.
- Prepared conformal and planar arrays using Matlab.
2 Nov 2019 – 15 May 2020, Turkish Aerospace Industries, Electronic Integration, Candidate Engineer, Ankara
- Created Python test scripts for helicopter autopilot systems.
18 Sep 2019 – 24 June 2020, Asisguard, Embedded Systems, Senior Project Group Member, Ankara
- Coded Python and Matlab scripts for communication between FPGA and Jetson.
23 June- 12 July 2019 FNSS (Subsidiary of BAE Systems), System Engineering, Summer Intern, Ankara
- Researched land-armed vehicles and completed functional hazard assessment and fault tree analysis in the system engineering department.
2-30 July 2018 Polaran, Telecommunication, Summer Intern, Ankara
- Created a design using Microblaze and VHDL for 5G polar codes.
Freelance Projects
Scientific Proof of 2D Energy Harvesting Devices
A detailed scientific literature review was conducted, and a report was prepared. GSM900 and Wi-fi bands rectennas and metamaterial antennas were considered.
Report on 3D Fabricated Patch Antennas
The antenna's dielectric part can be printed using 3D printing technology, and some techniques can be applied to apply the metallic part. Additive manufacturing using a 3D printer is getting a fruitful fabrication technique due to its high efficiency, cheapness, and high-speed fabrication turnaround. In this project, a patch antenna was designed by selecting the appropriate filament that can provide additive manufacturing, which is polypropylene. Generally, 2 metalization options are available. The first one is to print dielectric material and subsequently metalize it. The second option is to use direct conductive material. The last option is to use purely dielectric material for dielectric antennas. In this report, the first option is discussed. Thus, metallization of the dielectric is needed. However for most polymers, the temperature is critical; thus, most traditional methods will not be suitable. Among applicable ones, copper or aluminum tape, conductive silver epoxy coating, sputter deposition, metal spraying, and electroplating can be mentioned.
SIW Antenna for Space Applications
SIW antenna was designed using CST. The antenna is intended to work around 1.5GHz. The challenge is to design the antenna with very small dimensions in comparion with the working frequency. This is achieved by using slots and dielectric lens at the end of the antenna. By using these slots, antenna is also made directive as can be seen from its radiation pattern and 0.548 dBi gain is achieved. Rogers material is used as dielectric part.
PIFA Design and Optimization
Planar Inverted F-antenna and PCB design were provided by a company located in the USA. The length of the antenna and the distance between the feed and the ground were optimized for different scenarios. These scenarios include free space, the antenna on a human body with wet skin, and the antenna on a human body with dry skin. CST is used for all the simulations. On the left image, antenna and PCB can be found. On the right image, antenna inside of housing and the human body can be found. The graphic card of the computer is used for simulations in CST. Final dimensions of the antenna are reported for each scenario.
Undergraduate Projects
Antenna Engineering Term Project
Using Matlab Antenna Toolbox, a pyramidal horn antenna is designed. Using recycled materials like cardboard and alumina tapes, the antenna is fabricated. Feed location is optimized after fabrication. Using VNA, S-parameters were determined. The radiation pattern of the antenna is measured in an anechoic chamber room.
Microwave Engineering Term Project
A low-pass filter is designed to work at 1GHz. First, a design with lumped elements are derived. Then, a design with transmission lines is derived using Richard transformations and Kuroda identities. Simulations are completed using ADS. Using PCB technology, this filter is fabricated.
Projects in the Master of Science
Antenna Projects
3 types of antennas are designed and fabricated. First, a Vivaldi antenna is designed. The parameters of the design are taken from the literature. Simulations are done by using CST. Fabrication of the antenna is done by using PCB technology. The second type of antenna is a horn antenna. The antenna parameters are taken from HFSS Antenna Toolkit. A waveguide part is optimized with an SMA connector. The band of the antenna is X-band. This antenna is fabricated using a 3D printer. Copper tape and copper-sprayed metalization processes are applied to the surface of 3D printer x-band horn antennas. The last type of antenna is a double ridge horn antenna. A similar design procedure is used as the mentioned horn antenna. Again, this antenna is fabricated using 3D printers and metalized. All the fabricated antenna prototypes and results can be found below.
X-band Horn Antenna
3D Drawing of the Antenna
Radiation Pattern
Vivaldi Antenna
3D Drawing of the Antenna
Radiation Pattern
Double Ridge Horn Antenna
3D Drawing of the Antenna
Radiation Pattern
All Fabricated Antennas
To take transmission data in free space, 2 antennas were fabricated for each type. The reason behind fabricating 4 double ridge horn antennas is to test different metalization procedures.
Absorber Projects
Details will be provided after publication process.