Antenna Lab - Experiment 2 - KULLIYYAH OF ENGINEERING...

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Unformatted text preview: KULLIYYAH OF ENGINEERING DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ANTENNA AND WAVE PROPAGATION LABORATORY (ECE 4103) Experiment No 2 Yagi Uda Antenna LAB INSTRUCTOR: Bro Ibrahim GROUP MEMBER: Mohd Zulfadhli Faiq Bin Baharuddin 0511137 Hussam Abdalla Khalil Al-Qawasmi 0627123 Farah Hanum Binti Mohd Ariffin 0630544 Syarifah Nurzati Binti Abdul Rashid 0717444 Date of Experiment: 4 th January 2010 Objectives 1) To develop into familiars with yagi uda antennas and its signal pattern 2) To broaden our knowledge of the assembly and mode of operation by observed and determine the 3 dB width of the lobes of the yagi uda. 3) To experimentally investigate the influences of various antenna lengths and capacitive loads on the directional diagram. List of Components 1) 1 Rotating antenna platform 737 400 2) 1 Gunn power supply with SWR meter 737 021 3) 1 Gunn oscillator 737 01 4) 1 Isolator 737 06 5) 1 pin modulator 737 05 6) 1 Large Horn Antenna 737 21 7) 2 RF cable, L = 1m 501 02 8) 2 Support for waveguides components 737 15 9) 2 Stand base MF 301 21 10) 1 Set of microwave absorber 737 390 11) 1 Set of thumb screw M4 737 399 12) 1 Remote control for rotating antenna platform 737 401 13) 1 Dipole antenna kit 737 410 14) 1 Yagi-Uda antenna kit 737 430 Procedures 1) First of all, the set-up of the experiment below was assembled: 2) The dipole antenna was connected to the holder provided. After that, both the assembled holder with dipole antenna was set into the central mounting bore. The setup was observed so that the axis run parallel and perpendicular to the marked reference lines on the rotating base as in figure below. The axes of the test antenna and the rotating base must align. 3) The distance between the source and test antenna was set to 170cm. 4) The height, h from the stand base of the test antenna to the center of the yagi-uda antenna was measured and also the height from the base of the source antenna (the horn) to the center of the horn. Both heights were set up with equal height. 5) The plug of the antenna output cable was connected to the BNC input socket on the rotating base. The antenna was set to 0 positions as figure before. 6) After that, the Gunn power supply with SWR meter is switch on and supply voltage is setup to U G 9.5 V. 7) The PIN-modulator is set to INTern and the rotary knob for the modulation amplitude is turned to the right limit. In this case, we set it up to the maximum modulation amplitude. 8) The range switch v/dB of the SWR meter is set to 25 dB. 9) Then, we switch on the rotating antenna platform. 10) The bias current is set to setting 3 using the remote control. We should observe the movement at the SWR meter showing that there are incoming signal....
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Antenna Lab - Experiment 2 - KULLIYYAH OF ENGINEERING...

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