Coordinator
Dr Neelam Srivastava
Lab Area: 790 Sqfeet
Room Number: EC 202

Lab Faculty: Er Rajive Kumar

Lab Instructor: Mr Tejveer Singh

Lab Staff: Mrs Sarita Devi

Courses Covered

  • KEC 753D-Microwave & Radar EngineeringLab
  • REC 651-Microwave Engineering Lab
  • EC 751-Microwave & Fiber Optics Lab

LIST OF EXPERIMENTS KEC753D

SUGGESTIVE LIST OF EXPERIMENTS:
1. To study the microwave test bench.
2. To study the characteristics of a reflex klystron tube and to determine its electronic tuning range.
3. To determine the frequency and wavelength in a rectangular waveguide working on TE01 mode.
4. To study the measurement of reflection coefficient and standing wave ratio using the double minima method.
5. a) To study the isolation and coupling coefficient of a magic Tee.
b) To measure the coupling coefficient, Insertion loss & Directivity of a Directional coupler.
6. To study V-I characteristics of the Gunn diode.
7. To measure an unknown impedance with a Smith chart.
8. a) To measure attenuation and insertion loss of a fixed and variable attenuator.
b) To measure isolation and insertion loss of a three-port Circulator/Isolator.
9. Study of Attenuator (Fixed and Variable type.
10. To Study the working of Doppler radar, and measure the velocity of the object moving in the Radar range.

LIST OF EXPERIMENTS REC 651

REC 651 - ANTENNA AND MICROWAVE LAB

1. To study the microwave test bench.
2. To study the characteristics of reflex klystron tube and to determine its electronic
tuning range.
3. To determine the frequency and wavelength in a rectangular waveguide working on
TE 01 mode.
4. To study the measurement of reflection coefficient and standing wave ratio using double
minima method.
5. To study V-I characteristics of the Gunn diode.
6. To measure the polar pattern and gain of a waveguide antenna.
7. To study 3 element Yagi-Uda antenna and to calculate beam-width, front/back ratio,
and gain of the antenna.
8. To study 5 element Yagi-Uda antenna and to calculate beam-width, front/back ratio,
and gain of the antenna.
9. To study simple dipole antenna and to calculate beam-width, front/back ratio, and
gain of the antenna.
10. To study folded dipole antenna and to calculate beam-width, front/back ratio, and gain
of the antenna.
11. To study phase array end-fire antenna and to calculate beam-width, front/back ratio,
and gain of the antenna.
12. To study broadside array antenna and to calculate beam-width, front/back ratio, and
gain of the antenna.
Course Beyond the Syllabus:
1. Introduction to waveguide simulation using CST Microwave Studio Software.
2. Introduction to Antenna Design Using IE3D Software.
3. To simulate and analyse a simple rectangular microstrip antenna of L = 20 mm and
W=10 mm. Assume the value of dielectric constant = 2.2 and substrate thickness of
1.5 mm.

 List of Recent Equipment

DIGITAL STORAGE OSCILLOSCOPE WITH FUNCTION GENERATOR

Digital Storage Oscilloscope 50MHz, Two-channel, 1GSa/s sample rate, 100Kpts record length, 50000 wfrm/s update rate, Vertical sensitivity - 500µV to 10V/Div, with in-built 20 MHz function generator with 20V pp amplitude for Square, pulse, ramp and 12Vpp for sine wave, AM, FM & FSK Modulation feature, >80 dB dynamic range of Frequency Response analysis with Logarithmic overlaid gain and phase plot feature should be available, lab guide, tutorials and content on Oscilloscope fundamentals, Built – in digital voltmeter and frequency counter, Input Impedance- 1 MΩ ± 2%/16 pF ±3 pF, Display size 7 inch or more, waveform math includes Add, subtract, multiply, divide, FFT (magnitude and phase), low pass filter available, inbuilt array of training signals with lab guide, manufacturer should have NABL accredited service and Calibration lab in India, USB Interface with compatible software to connect and control the instrument and to build custom test sequence with the integrated test flow app to automate and visualize test result without the need for instrument programming, 2 Passive.Probe should be provided with oscilloscope and have selectable 10:1 and 1:1 attenuation. Warranty at least 3 – years

KLYSTRON  POWER SUPPLY

Beam Supply 195-400 V continuously variable Current  45mA Max Regulation Better than 0.5% for ± Variation in mains Supply Voltage Ripple Less than 5mV rms Repeller Supply -10 V to -300 DC continuously variable with respect to Klystron cathode 0-25% for ± Variation in mains Supply Heater Supply 6.3V DC (regulated). Modulation: Square Wave Frequency 500Hz-1.7 KHz Max Amp.+ 110 V p-p,  Saw tooth Frequency 50Hz-196 Hz Max Amp.- 60 V p-p. Operating Voltage 230V+10%, 50 Hz, A.C Short Circuit Protection.Toggle switch for Beam Voltage Variation Saw tooth wave output External Input. Should be single transformer 4 type different PCB for manufacture SKPS.

KLYSTRON MOUNT  

Freq. Range (GHz)  8.2-12.4 Flange UG-39/U Waveguide RG-52/U                                                                                                                              

KLYSTRON TUBE

2k25 or equivalent

FREQUENCY METER, DIRECT READING

Frequency Range (GHz) 8.2-12.4 Calibration Accuracy +2 Calibration Increment (MHz) 10 VSWR Max. 1.02

WAVE GUIDE DETECTOR

Frequency range 8.2-12.4(ghz)detector in-21 output connector BNC(f)

MATCHED TERMINATION

Frequency Range (GHz) 8.2-12.4 Flange UG-39/U Waveguide RG-52/U VSWR Max. 1.02 Type fixed

VSWR METER, SOLID STATE

Range 70 dB in 10 dB and 2 dB steps. Meter scale SWR 1-4,SWR 3-10, expanded SWR1- 1.3, dB 0-10 expanded  dB 0-2,4,6,8. Input Unbiased low and high impedance crystal, biased crystal (200 Ώ & 200K) low and high current bolometer (4.5 & 8.7 mA) (200 ohms). Sensitivity 0.2 µv for full scale deflection at maximum bandwidth on low impedance crystal input Input Frequency 1Khz adjustable + by front panel control Gain control  Adjust the reference level, variable range 0-10db approx Amplifier Output 0.03 Vrms into at least 10K ohms, output connector BNC  Recorder Output 0-1 V DC ,Output Connector, Banana Socket. Band Width-Variable 25 Hz to 110 Hz. Calibration Square law, meter indicate SWR, dB.

DIELECTRIC ANTENNA

Material perfex Waveguide WR-90 Flange UG-39/U

SLOTTED ANTENNA NARROW WALL

Waveguide WR-90 Flange UG-39/U Length:220mm Slot length:14.56mm

SLOTTED ANTENNA BROAD WALL

Waveguide WR-90 Flange UG-39/U Length:220mm

DIGITAL GUNN POWER SUPPLY

Voltage Range 0 to 12 volts variable Current 1 Amp. Max Modulation Freq. 1 KHz + 20% ( 900-1100 Hz).Regulation 0.2±10% variation in the Mains Supply Voltage Ripple 1m Vrms

GUNN OSCILLATOR

Frequency Range (GHz)  8.2-12.4 Flange UG-39/U Waveguide RG-52/U Pushing fac.(MHz/V)-8 Bias V. Max-10v Normal Power Output-10 Temperature  Coeff. (MHZ)- ±0.2 Frequency Adjustment-by Micron meter

PIN DIODE MODULATOR

Frequency Range (GHz)  8.2-12.4 Flange UG-39/U Waveguide RG-52/U Output Connector TNC

MOVABLE SHORT

Frequency Range (GHz) 8.2-12.4 Flange UG-39/U Waveguide RG-52/U

MICROPROCESSOR BASED TURN TABLE WITH SOFTWARE

Step angle = 1° Variable gain = 10dB, Sensitivity = 5 mV  PC software based on Visual Basic, Power readings in dB, Angle in degree. Readings saved in excel file as Angle V/S power. Online graph radial pattern, 0 to -70 dB. Connectivity through COM port as well as through USB to serial converter. Home and scan buttons on the screen. Automatically detects Home and Far limits. Facility to calibrate before the actual scan. Square wave input from the detector Motor used for rotation – Synchronous Motor

PART I : MICRO STRIP COMPONENTS

Freq. range 4- 6 GHz

Substrate – Neltek

Dielectric constant   : 3.2

  1. Low Pass Filter- LPF-910C
  2. Band Pass Filter- BPF-915C
  3. Bandstop Filter- BSF-920C
  4. Ring Resonator- RR-925C
  5. Branch line Coupler- BLC-930C
  6. Hybrid Ring coupler- HRC-935C
  7. Parallel Coupled line Couplerm- PCLC-940C
  8. Power divider –I (without chip resistor)- PD-945C
  9. Power divider –II (with chip resistor)- PD-950C
  10. Patch Antenna-I- PA-955C
  11. Patch antenna-II- PA-960C
  12. Microwave Amplifier- AMP-965C
  13. Microstrip Transmission line- MTL-975

PART II : C-BAND SOURCE & DETECTOR

(Freq. range 4-6 GHz)

  1. C-band source with power supply- SSS-980C
  2. Detector- MD-985C
  3. Coupler- MC-995C
  4. Active Filter- AF-900C

PART III :  ACCESSORIES

  1. Universal Testing Jig- UTZ-970
  2. 50 Ohm termination
  3. Attenuator – 6 dB
  4. Stand
  5. RF Cable SMA to SMA (9”)
  6. SMA to BNC Cable
  7. V.S.W.R. Meter
  8. Source to Detector biasing cable