MICROWAVE OPTICS - Granular Materials Laboratory

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Microwave Optics012-04630FCopy-Ready ExperimentsThe following Experiments provide a thorough introduction to wave theory usingthe microwave system. We expect that the student approaches each experimentwith the appropriate theoretical background, therefore, basic principles are onlybriefly discussed in each experiment.The experiments are written in worksheet format. Feel free to photocopy them foruse in your lab.6
012-04630F Microwave OpticsPurposeProcedureExperiment 1: Introduction to the SystemEQUIPMENT NEEDED:– Transmitter – Goniometer– Receiver – Reflector (1)This experiment gives a systematic introduction to the Microwave Optics System. This mayprove helpful in learning to use the equipment effectively and in understanding the significance ofmeasurements made with this equipment. It is however not a prerequisite to the following experiments.1 Arrange the Transmitter and Receiver on the Goniometeras shown in Figure 1.1 with the Transmitterattached to the fixed arm. Be sure to adjust bothTransmitter and Receiver to the same polarity—thehorns should have the same orientation, as shown.R2 Plug in the Transmitter and turn the INTENSITYselection switch on the Receiver from OFF to 10X.(The LEDs should light up on both units.)3 Adjust the Transmitter and Receiver so the distancebetween the source diode in theTransmitter and the detector diodein the Receiver (the distance labeledR in Figure 1.1) is 40 cm(see Figure 1.2 for location ofpoints of transmission and reception).The diodes are at the locationsmarked "T" and "R" on thebases. Adjust the INTENSITY andVARIABLE SENSITIVITY dialson the Receiver so that the meterreads 1.0 (full scale).4 Set the distance R to each of thevalues shown in Table 1.1. For eachvalue of R, record the meter reading.(Do not adjust the Receiver controlsbetween measurements.) After makingthe measurements, perform thecalculations shown in the table.5 Set R to some value between 70 and90 cm. While watching the meter,slowly decrease the distance betweenthe Transmitter and Receiver. Doesthe meter deflection increase steadilyas the distance decreases?Effective Point of Emission ofTransmitter Signal5 cm 5 cmTransmitterR(cm)4050607080901007Figure 1.1 Equipment SetupFigure 1.2 Equipment SetupMeter Reading (M)Table 1.1Effective Point of Reception ofTransmitter SignalM X R(cm)ReceiverM X R 2(cm 2 )1.0 40 1600
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MICROWAVE OPTICS - Granular Materials Laboratory

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