High Frequency Electronics Lab

Welcome!

The primary aim of High Frequency Electronics Lab (HFEL) is to conduct research and develop cutting-edge applications focusing on RF & Microwave Engineering. We have a wide portfolio that spans from Bio-Electronics to Radar Systems and RFIC design.

Ongoing Research Projects

Coil Design for Transcranial Magnetic Stimulation

TMS (Transcranial Magnetic Stimulation) is a neuro-modulation technique used as therapy for neurological disorder such as major depressive disorder, traumatic brain injury and others. It is very popular as it is a surgery free treatment. The principle of the TMS is a short high pulse current is applied to the designed coil to stimulate the human brain. The applied pulse produces a magnetic field which induces E field in the brain tissue. A localized axial depolarization in the cortex tissue is produced by the induced current. The axial depolarization has therapeutic effects for neurological disorder. So, the target of our designed coil was to achieve the maximum amount of magnetic field which could generate acceptable amount of E-field to simulate the brain.

24 GHz Power Amplifier Design

We are currently working on a 24 GHz, 3-stack differential power amplifier for FMCW radar. A stacked FET structure is used to increase the breakdown voltage and output power of the PA. This work uses 3.3 V DC supply, and the current consumption is 184.42 mA. The adjacent figures show the schematic and performance parameters of this power amplifier.

Transceiver Design for Frequency Diverse Array Radar

Phased arrays are known for electronic beam-steering using phase shifts across the antenna array elements. In recent years, a Frequency Diverse Array (FDA) has been proposed where the frequencies are incremented across the array to achieve a beam-pattern that varies not only in angle, but in time and range as well. HFEL is currently investigating the advantages and feasibility of such a radar. It has been revealed so far that this radar is advantageous if non-linear frequency increments are used across the array elements. On the downside, it will require a large number of frequency synthesizers that should have very precise initial phase synchronization. Taking this into consideration, HFEL is determined to design a transceiver for FDA and compare its performance with conventional phased array radars.