Microwave and MIC Lab

 MICROWAVE AND MIC LABORATORY

RF/Microwave laboratory supportsUG and PG laboratory courses.Also PG, MS by research and PhD projects on the design, theory, and prototyping of antennas, filters and other MIC components. The laboratory includes facilities for the real timefabrication of experimental prototypes as well as software resources for simulation, design and analysis.

Laboratory Incharge:

 

Dr. S. Raghavan,

Professor,

Mail Id: raghavan@nitt.edu

Ph : 0431-2503348

Dr.R. Pandeeswari,

Assistant Professor,

Mail Id: rpands@nitt.edu

Ph : 0431-2503318

 

Courses Offered:

 

S.No.

Graduate Programme

Courses

Semester

1.

UG

EC409 Microwave Laboratory

VII

2.

PG

EC607Microwave and MIC Laboratory

I

List of Experiments:

S. No

Experiments (EC409)

       1.

Measurement of Impedance- Direct and Indirect method

       2.

Study of wave propagation

       3.

Study of Directional Coupler

       4.

Study of E plane, H plane and Magic-Tee

       5.

V-I characteristics of Gunn diode

       6.

Study of Isolator and Circulator

       7.

Frequency and Wavelength Measurement

       8.

Radiation Pattern of Horn antenna

S. No

Experiments (EC607)

       1.

Characteristics of Gunn diode, Frequency and wavelength measurement

       2.

Characteristics of Reflex Klystron

       3.

Characteristics of Multi-hole directional coupler

       4.

Characteristics of Circulator and Isolator

       5.

Micro strip antenna design using HFSS

       6.

Characteristics of Horn antenna

       7.

Characteristics of power divider

       8.

Measurement of transmission loss of 50W micro strip line

       9.

Characteristics of Low pass filter

       10.

Experiment  using CST microwave studio

Microwave Laboratory Equipments:

Software / Tools:

S.No

Software/Tool

Quantity/ No. of Licenses

Cost of the Tool (Lacs)

1.

High Frequency Structure Simulator (HFSS)

05 Lic

12.5

2.

Computer Simulation Technology (CST)

10 Lic

8

3.

Advanced Design System (ADS)

 

 

4.

COMSOL

 

 

5.

IE3D

 

 

Equipments- Hardware:

S.No

Equipment

Quantity

Cost of  Equipment’s (Lacs)

1.

Vector Network Analyzer

1

7

2.

Antenna Prototyping Machine

1

10

3.

Microwave X-Band educational Test Bench

03

2.40

4.

SICO Test Bench

02

1.60

5.

MIC Kit

03

4.10

6.

Spectrum Analyzer HP 8593 E

01

6.0

Research Works:

1. Metamaterial inspired structures for antenna design and Specific Absorption Rate reduction

In recent years, EM metamaterials play a very major role in the rapid evolution of wireless communication systems. SRRs’ finds many applications in microwave devices like filters, couplers and antennas. SRRs are a class of these metamaterials; tend to exhibit negative permeability, upon EM wave intervention perpendicular to its axis.It aids in withstanding the demand for compact, low profile and multi-band antennas. SRRs are also used as superstrates for patch antennas to reduce Specific Absorption Rate (SAR). The stop bands of SRR correspond to either negative permeability or negative permittivity. These stop bands absorb antenna’s radiation, thereby reducing the SAR

2. FDTD Analysis.

The numerical approximation of Maxwell’s equations, computational electromagnetics (CEM), has emerged as a crucial enabling technology for radio-frequency, Microwave, and wireless engineering. Three most popular “full-wave” methods are Finite Difference Time Domain method (FDTD), Method of Moments (MoM) and Finite Element Method (FEM).FDTD, a differential type time domain approach is a versatile method requiring almost no preprocessing of Maxwell’s equations to arrive at governing equations. The FDTD method has seen robust growth in research activity in the last decade due to its applications in almost all areas, including communications, computing, and bio-medicine. One-dimensional FDTD analysis is applied to study basic phenomenon like reflection at an interface between two media, determination of propagation constant in lossy medium and design of material absorbers. The pulse undergoes many reflections in to-and-fro manner between the discontinuities and a SteadyState is reached after a few nanoseconds. Two-dimensional FDTD is used to analyze guiding structures called waveguides where the transverse modes (TE and TM) are propagated along the guiding structures. Three dimensional FDTD is used to analyze real-world problems.

3. Substrate Integrated Waveguide based Antennas

Substrate Integrated Waveguide (SIW) has emerged as a new concept for millimeter-wave (mm wave) integrated circuits and systems for the next generation due to their manifold advantages. A waveguide based on SIW is considered as a dielectric filled rectangular waveguide whose metallic walls are formed by cylindrical via arrays with diameter d and separation p between vias (pitch). SIW yields high performance from very compact planar circuits.

4. Metamaterial antennas for bio-medical applications

Metamaterials can have their electromagnetic properties altered to something beyond what can be found in nature. Hence metamaterials have been attracted great interest among microwave engineers and physicists, due to showing exotic electromagnetic properties at microwave frequencies. A split-ring resonator (SRR) is one of the metamaterial particles that offer negative permeability, while complementary split-ring resonator (CSRR), the duality of SRR, interacts with the electric field and introduces negative permittivity, which are most commonly used in biomedical sensors. It is well known that SRRs are resonant structures, and consequently, it is possible to employ these resonances as well as radiating modes. SRRs are very compact and it is easy to design them with dual band characteristic.

Research Scholars:

S.No.

Graduate Programme

Current Scholars

Passed Out

1.

Ph.D.

8

7

2.

MS by Research

2

2

3.

PG

4

-

Awards:

  1. Best Paper Award : M.Ramaraj, Dr. S. Raghavan, “Homomorphic Filtering Techniques for WCE Image Enhancement”, 2013 IEEE International Conference on Computational Intelligence and Computing Research (ICCIC), 26 -28 Dec 2013- BEST PAPER AWARD
  2. S. Imaculate Rosaline, Dr. S. Raghavan, “Survey on Metamaterials in Bio-Medicine”,2013 IEEE International Conference on Computational Intelligence and Computing Research (ICCIC), 26 -28 Dec 2013, BEST PAPER AWARD
  3. Research scholars receivedCanadian Commonwealth Scholarship Award for Graduate Student Exchange Program in the Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada.

 

Ph.D.  Student Visited Abroad

Duration

Area of Research and Foreign Supervisor

M. Ramaraj

 

Biomedical Microwave Imaging


Publications:

 

S.No.

Publications

No. of Publications

1.

Conferences

281

2.

Journals

79

3.

Books

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