OFFICE: MICROWAVE LAB E2L3. COURSE CODE: ECE 3203, ECE 4203. Experiment No. 1: Introduction of a Microwave Bench. 2 MICROWAVE AND RADAR LAB (EE-322-F). LIST OF EXPERIMENTS. NAME OF EXPERIMENT. To study wave guide components. ![]() ![]() Soap In The Microwave ExperimentMay 31, 2014 - 58808269 microwave-manual. MW LAB-ECE A SYLLABUS EC 2405 - OPTICAL & MICROWAVE LAB MICROWAVE EXPERIMENTS: 1. 58808269 microwave-manual • 1. RAJALAKSHMI ENGINEERING COLLEGE EC2405-OPTICAL & MW LAB-ECE A RAJALAKSHMI ENGINEERING COLLEGE Thandalam, Chennai – 602 105. Department of Electronics and Communication Engineering EC 2405 OPTICAL AND MICROWAVE LAB MANUAL (VII SEM ECE) 1 Prepared by M.Sathish and M.Revathi • RAJALAKSHMI ENGINEERING COLLEGE EC2405-OPTICAL & MW LAB-ECE A SYLLABUS EC 2405 - OPTICAL & MICROWAVE LAB MICROWAVE EXPERIMENTS: 1. Reflex klystron – Mode characteristics. Gunn Diode – Characteristics. VSWR, Frequency and Wave Length Measurement. Directional Coupler – Directivity and coupling co – efficient – S – Parameter Measurement. Isolator and Circulator – S – Parameter Measurement. Attenuation and Power Measurement. S – Matrix Characterization of E – Plane T, H – Plane T and Magic tee. Radiation Pattern of Antennas. Antenna Gain Measurement. OPTICAL EXPERIMENTS: 1. DC Characteristics of LED and PIN Photo Diode. Cessna 172m parts manual. We know of no other company who does this! Each day, we process all returns and exchanges before new orders go out. Mode Characteristics of Fibers. Measurement of Connector and Bending Losses. Fiber Optic Analog and Digital Link. Numerical Aperture Determination for Fibers. Attenuation Measurement in Fibers. Prepared by M.Sathish and M.Revathi • RAJALAKSHMI ENGINEERING COLLEGE EC2405-OPTICAL & MW LAB-ECE A Expt: No: 1 REFLEX KLYSTRON CHARACTERISTICS AIM: To study mode characteristics of reflex klystron and hence to determine mode number, transmit time, electronic tuning ranges (ETR) and electronic tuning sensitivity (ETS). EQUIPMENT REQUIRED: Klystron tube, klystron power supply, Isolator, Frequency meter, Variable attenuator, Detector mount, V.S.W.R Meter, C.R.O. PROCEDURE: Mode studies: 1. Connect the components and equipments as shown in fig. Keep the control knob of klystron power supply as below: Mode switch: CW Beam voltage knob: Fully anti-clockwise Repeller voltage knob: Fully clockwise Meter switch: Cathode voltage position 3. Rotate the frequency meter at one side. Switch on the klystron power supply, V.S.W.R meter and cooling fan for the klystron tube. Wait for 1-2 minutes for the klystron to respond. Cathode voltage knob at minimum position gives a beam voltage of 235V. Observe beam current on the meter by changing meter switch to beam current position. “The beam current should not be more than 30mA”. Home Labs Microwave ReviewNow change the meter switch to repeller voltage position. Select proper range for the power meter so that power output of maximum mode will not exceed the meter range. Decreasing the reflector voltage, record output power and frequency. To measure frequency, switch the Mode-switch of klystron to AM mode and observe output on CRO display. By matching the detector with tuning posts adjust for maximum output. Use AM amplitude, frequency controls and controls on Oscilloscope front panel try to get clear display on C.R.O. By rotating the frequency meter, observe for dip in the output and note the corresponding frequency. Plot power/relative frequency versus repeller voltage to get mode curves. Compute various parameters from the graph. Mechanical and Electronic Tuning: Mechanical tuning depends on changing the width of cavity i.e. The effective I capacitance and thus the resonant frequency of the klystron changes. The power output remains same with tuning. Electronic tuning refers to change in repeller voltage causing a change in output frequency. However, the power output also changes. A measure of electronic tuning is given by ‘Electronic Tuning Sensitivity (ETS)’. This can be determined by taking the slope of the frequency characteristic of the modes. 3 Prepared by M.Sathish and M.Revathi • RAJALAKSHMI ENGINEERING COLLEGE EC2405-OPTICAL & MW LAB-ECE A EXPERIMENTAL SETUP: Fig.(A) Microwave bench setup for study of klystron modes OBSERVATIONS: S.No. Repeller Voltage (Volts) Power Output (mW) Wave meter reading Frequency (GHz) 23/4 13/4 33/4 Output Power 43/4 (mW) 3/4 Reflector Voltage f0+∆f Relative Frequency f0 f0+∆f Reflector Voltage Mode Characteristics of Reflex Klystron CALCULATIONS: 1. Knowing the maximum voltage of two adjacent modes, mode number can be computed using the relation Prepared by M.Sathish and M.Revathi Klystron Power Supply Reflex Klystron Isolator Frequency Meter Detector Mount C.R.O V.S.W.R. Meter • RAJALAKSHMI ENGINEERING COLLEGE EC2405-OPTICAL & MW LAB-ECE A N2/N1 = V1/V2 = (n+1+3/4)/(n+3/4) Where N1, N2 -------- mode numbers V1, V2-------- repeller voltages 2.
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