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  • Tuned Radio Frequency Receiver
    3,310 words
    Radio: A Form of CommunicationPhysicsIdoh GerstenMr. ZambiziPhysicsMarch 12, 1995 Radio is a form of communication in which intelligence is transmitted without wires from one point to another by means of electromagnetic waves. Early forms of communication over great distances were the telephone and the telegraph. They required wires between the sender and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation of energy from transmitting antenna in th...
  • Instantaneous Frequency Of An Fm Signal
    725 words
    Abstract This paper will discuss the design of an FM receiver. It will begin with a brief historical backdrop of FM broadcasting and its use in society. It will continue by providing the necessary mathematical background of the modulation process. Furthermore, it will enumerate some of the advantages of FM over other forms of modulation, namely AM. Finally, the paper will discuss the design of a basic FM receiver as well as introduce some circuits and circuit components which the reader may not ...
  • Whales And Bats Use Ultrasound Frequencies
    411 words
    Ultrasound - Quick Project Ultrasounds are sound waves with frequency beyond the human limits, therefore humans are unable to hear them. It even travels at exactly the same speed as sound in any medium. Humans can hear sound within the frequency range of about 20 to 20,000 Hz, so any sound above 20 k Hz is ultrasound. Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves and their echoes. The technique is similar to the echolocation used by bats, whale...
  • Rfid Tags
    837 words
    Abstract RFID is the inventory management of the future. With the help of this technology companies will have total supply-chain visibility, improved product in-stock rates, and protection against counterfeiting. Introduction Radio Frequency Identification (RFID) is a technology that's been touted as a replacement for Bar Code. RFID tags resemble the size of a postage stamp that has contained with in a minute microprocessor with storage capability, as well as an antenna which communicates with t...
  • Brain's State Closer To The Stimulus Frequency
    1,022 words
    Theory behind BrainWave Generator EEG and the brain's state EEG (Electroencephalography) technology is used to measure brain's electrical vibrations from the surface of the scalp. The resulting EEG pattern will contain frequency elements mainly below 30 Hz. The frequencies are categorized into four states as follows: State Frequency range Amplitude State of mind Delta 0.5 Hz - 4 Hz high (up to 200 uV) Deep sleep Theta 4 Hz - 8 Hz low (5 uV - 20 uV) Drowsiness (also first stage of sleep) Alpha 8 ...
  • Test Procedure Oscilloscope Measurements
    525 words
    Contents Introduction & Test Procedure Page 3 Test Procedure (contd.) Page 4 Peak-to-Peak voltages & Frequency explained Page 4 Conclusion Page 4 Results Pages 5-10 Introduction The purpose of this laboratory exercise was to introduce the student to the techniques of using an Oscilloscope, a test meter, a waveform generator and a spectrum analyser. Three waveforms were examined; the first was a SINE WAVE; the second was a SQUARE WAVE; the third was a TRIANGULAR WAVE. The Oscilloscope was also us...
  • Experiment On The Male Bullfrogs
    1,042 words
    The bullfrog belongs to the family Rani dae and is commonly known for their deep resonant croaks, large body size and large ears (tympani). These frogs have a body size of 20 cm/ 8 in and have legs that are longer than the body (25 cm/10 in). They reside in the United States, Canada, Mexico, Africa, and many others in quiet lakes and ponds. Bullfrogs are very aggressive when defending their territories and do not hesitate to attack invaders, even if a frog. Being that the bullfrogs have large ea...
  • Synthetic Aperture Radars Use X Band
    474 words
    Radar applications by frequency: HF (3 to 30 MHz) The very first British radar system chain home used the HF band, but it was soon realised that these frequencies were becoming too crowded with other users and they suffered from too much external noise for serious use. The HF band is still good for long-range over-the-horizon radar. (See examples of radar systems) VHF (300 to 1,000 MHz) Used for Military airborne early warning (AEW) radars. UHF is good for aircraft and missile detection in the m...
  • Radar Units Use Microwave Frequencies
    683 words
    system or technique for detecting the position, movement, and nature of a remote object by means of radio waves reflected from its surface. Although most radar units use microwave frequencies, the principle of radar is not confined to any particular frequency range. There are some radar units that operate on frequencies well below 100 megahertz (megacycles) and others that operate in the infrared range and above. The term radar, an acronym for radio detection and ranging, is also used to denote ...
  • Amplitude And Length Of The Pendulum
    1,028 words
    SPH 3 U: An Investigation of the Pendulum Corey McCormick Question: What are the relationships between the frequency of a simple pendulum and its amplitude, and length? Prior Knowledge: Variable SI Unit Definition Amplitude cm Distance from the equilibrium position to the maximum displacement. Frequency Hz The number of cycles per second. Label the amplitude and length of the pendulum below. Materials: "h List the materials you have been given (and any other you decide to use) 1 A meter Stick 2 ...

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