PPT-What are Microwaves and what Is Microwave Communication?

Microwaves Microwaves are electromagnetic waves with a frequency with wavelengths ranging from one meter to one millimeter frequencies between 300 MHz and 300 GHz Microwaves are ideal when large areas need to be covered and there are no obstacles in the path. 1 Each type has its advantages with respect to the others In Fig 1 it should be noted that the substrate materials are denoted by the dotted areas and the conductors are indicat ed by the bold lines The microstrip line is a transmis sionline geometr History of Microwaves. In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave!. History of Microwaves. In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave!. 5.3 Identify science principles of food preparation.. State Standards. Journal . How often do you cook meals in the microwave? What are your favorite meals to cook in the microwave? Write one paragraph describing the use of your microwave at home.. By Tyler Miller. The Microwave Oven. The first personal microwave was introduced in 1967 by the Amana Corporation. The first microwave for home use was introduced by Tappan in 1955. .. The heating effect of microwaves was discovered accidentally in. -presentation-. DR INZ. . ZDZISŁAW. . PÓLKOWSKI. Polkowice-. 2015. University of . Pitesti and. Dolnośląska Wyższa Szkoła Przedsiębiorczości i Techniki w Polkowicach. STUDENT: . CONSTANTIN. How long have microwaves been around?. In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave!. Kowtaluk, Helen and Orphanos Kopan, Alice. . Food For Today. . McGraw Hill-Glencoe. 2004.. Microwave Cooking Techniques. Microwave Oven Basics. Fast, healthful way to cook. Food cooks quickly with less fat and liquid; less nutrient loss. _____ 1. Dishes holding food stay cool in a microwave oven.. _____ 2. Only containers made especially for microwave ovens can be used for cooking in a microwave oven.. _____ 3. Food in a microwave oven cooks very evenly.. Microwave ovens generate electromagnetic waves (called microwaves) which makes water move. This motion leads to friction, and friction leads to heating. Microwave heating works by heating water in foods by making water molecules vibrate. That is why dry foods like . Microwave. Abdullah . althunayan. . 200600300. Outline. History. microwaves. . Microwave sources. Communication. . History . The . existence of radio waves was . discovered by . James Clerk Maxwell in 1864 from his equations. In 1888, Heinrich Hertz was the first to demonstrate the existence of radio waves by building a spark gap radio transmitter that produced 450 MHz microwaves. The equipment he used was . MICROWAVE COMMUNICATION “God chose the weak things of the world to shame the strong.” 1 Cor. 1:27 What is Microwave Microwave Communications Is simply a high radio frequency link specifically designed to provide signal connection between two specific points. Microwave Cooking How long have microwaves been around? In 1945, Dr. Perry Spencer, a scientist, was working in a lab when he felt some heat on his hand. The heat was coming from microwaves. These were being emitted from a nearby vacuum tube. Dr. Spencer was curious and place a chocolate bar near the tube. Within seconds, the chocolate melted. That sticky mess was the beginning of a brilliant idea – the microwave! Or . What . happens when you put things in a microwave . that . you shouldn’t put in a microwave. ?. with. Oliver Barker (Science and History of Microwave Cooking). Adam . Theaker. (Foam and Lightning).