Microwave Lab M.Pdf
EXPERIMENT NO. 1
AIM :- To study wave guide components. APPARATUS REQUIRED :- Flanges, Twisted wave guide, wave guide tees, Directional Coupler, Attenuator, Isolators, Circulators, Matched terminator, Slide screw tuner, Slotted Section, Tunable probe, Horn antennas, Movable Short, Detector mount. THEORY:- A pipe with any sort of cross- section that could be used as a wave guide or system of conductors for carrying electromagnetic wave, is called a wave guide in which the waves are truly guided. (1) FLANGES :- Flange are used to couple sections of wave guide components. These flanges are designed to have not only mechanical strength but also desirable electric characteristics. (2) TWISTED WAVEGUIDE :- If a change in polarization direction is required, twisted section may be used. It is also called rotator. (3) WAVE GUIDE TEE :- Tees are junctions which are required to combine or split two signals in a wave guide. Different type of tees are :(a) H - PLANE TEE :- All the arm of the H- plane Tee lies in the plane of the magnetic field which divide among the arm . This is thus a current or parallel junction. (b) E- PLANE TEE : - It lies in the plane of electric field . It is voltage or series junction. In this signal is divided in to two parts having same magnitude but in opposite phase. (c) MAGIC TEE :- If another arm is added to either of the T-junction. Then a hybrid T-junction or magic tee is obtained. The arm three or four is connected to arm 1&2 but not to each other. (4) DIRECTION COUPLER :- The power delivered to a load or an antenna can be measured using sampling technique in which a known fraction of the power is measured so that the total may be calculated. A number of coupling units used for such purpose are known as directional coupler. (5) ATTENUATORS :- It consist of a resistive wane inside the wave guide to absorb microwave power according to its position w.r.t side wall of the wave guide. Attenuation will be maximum if the wane is placed at center. (a)
AIM :- To study wave guide components. APPARATUS REQUIRED :- Flanges, Twisted wave guide, wave guide tees, Directional Coupler, Attenuator, Isolators, Circulators, Matched terminator, Slide screw tuner, Slotted Section, Tunable probe, Horn antennas, Movable Short, Detector mount. THEORY:- A pipe with any sort of cross- section that could be used as a wave guide or system of conductors for carrying electromagnetic wave, is called a wave guide in which the waves are truly guided. (1) FLANGES :- Flange are used to couple sections of wave guide components. These flanges are designed to have not only mechanical strength but also desirable electric characteristics. (2) TWISTED WAVEGUIDE :- If a change in polarization direction is required, twisted section may be used. It is also called rotator. (3) WAVE GUIDE TEE :- Tees are junctions which are required to combine or split two signals in a wave guide. Different type of tees are :(a) H - PLANE TEE :- All the arm of the H- plane Tee lies in the plane of the magnetic field which divide among the arm . This is thus a current or parallel junction. (b) E- PLANE TEE : - It lies in the plane of electric field . It is voltage or series junction. In this signal is divided in to two parts having same magnitude but in opposite phase. (c) MAGIC TEE :- If another arm is added to either of the T-junction. Then a hybrid T-junction or magic tee is obtained. The arm three or four is connected to arm 1&2 but not to each other. (4) DIRECTION COUPLER :- The power delivered to a load or an antenna can be measured using sampling technique in which a known fraction of the power is measured so that the total may be calculated. A number of coupling units used for such purpose are known as directional coupler. (5) ATTENUATORS :- It consist of a resistive wane inside the wave guide to absorb microwave power according to its position w.r.t side wall of the wave guide. Attenuation will be maximum if the wane is placed at center. (a)