JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

To understand and gain knowledge about:

• 1. Measurement of wave length and Frequency of microwave signals.
• 2. The use of microwave test bench in analysing various types of microwave measurements.
• 3. Measurement of microwave power.
• 4. Measurements on passive microwave components and Network analyzer

Course Outcomes

At the end of the course students will be able to

• 1. Analyze the functional blocks involved in Microwave Measurements such as test sets, couplers and other components.
• 2. Know Network Analyser principle, Reflection and Transmission measurements using vector network Analyser.
• 3. Measure the Antenna radiation pattern, gain, Far-field and Near-field techniques.
• 4. Prioritize the methods and limitation of different microwave parameters measurement.

UNIT - I

Measurement of wave length and Frequency, equivalent circuit of cavity wave meters. Typical wave meters, Resonant cavities. Methods of frequency measurements-Direct measurement – Interpolation method.

UNIT - II

Measurement of reflection coefficient Low, high, medium VSWR measurements. Standing wave pattern, Slotted line section and its limitation. Impedance measurement techniques. Nodal shift method. Tangent method. Reflectometer.

UNIT - III

Measurement of microwave power: Typical barater elements, thermistor. Bolometer bridge circuits, extending range of bolometer devices, low and high-power measurement techniques.

UNIT - IV

Measurement of attenuation: insertion loss method. Substitution method. Measurement of S- parameters. Network Analyser principle. Reflection and Transmission measurements using vector network Analyser.

UNIT - V

Measurements on passive microwave components. Characteristics of directional coupler. Isolator, Circulator. Antenna Measurements. Measurements of radiation pattern, Antenna gain measurements. Far field and Near field techniques.

TEXT BOOKS:

• 1. Ginzton, EL- Microwave Measurements, McGraw Hill
• 2. Sucher & Fox - Microwave Measurements, Vol.I, II, III.

REFERENCE BOOK:

• 1. Montgemery. Cc., Techniques of Microwave Measurements, Radiation Lab Series M.TECH.- I YEAR- I SEMESTER MICROWAVE AND RADAR ENGINEERING