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The term Microwave is a description of a high frequency radio wave in the range of 1 Gigahertz (One million cycles per second) to 40 gigahertz (40 million cycles per second). Radio waves at this frequency have the tenancy to reflect & refract making them useful for a wide number of applications.
Also since the radio wavelength is related to the frequency (frequency in Hertz divided by the speed of light in metres per second equals wavelength) the aerial size for this band is very small allowing for the use of exotic aerial systems such as dishes.
Dish aerials (antenna) are extremely efficient reflectors for microwave transmitters producing point to point links which can operate over many miles. Unlike High low and medium frequency Transmitters, microwave frequencies are not affected by the ionisation of the gas layers in the atmosphere. Therefore they tend to pass straight through the atmosphere rather than being reflected or refracted back to Earth. This makes them very useful for space communications and radio astronomy.
Microwaves do have some problems though. It is relatively expensive to generate high output at microwave frequencies. Also the nature of microwaves is that they do not pass through solid or grounded objects. This means that rain clouds can block the signal. Also at high power, microwaves excite water molecules, causing them to heat up (this is the principle of the microwave oven). Therefore inappropriate use can be hazardous to health.
Microwave are used to locate ships and planes, track weather systems, and determine the speeds of moving objects. They are the principal carriers of television, telephone, and data transmissions between stations on Earth and between the Earth and satellites.
What else can I help you with?
What is function of capacitor in 555 IC?
the capacitor and its associated resistor set the time constant.
What is the principle of function generator?
with the help of function generator we found wave in oscilloscope
What is function of emitter bypass capacitor?
A: THE EMITTER resistor sole function is to provide stability if it is by passed by a capacitor then this resistance will change due to frequency since as frequency increases the impedance decreases. The total gain will change accordingly
What is the function of a bypass capacitor in an amplifier?
Bypass capacitors are used to bypass (shunt) unwanted signals to the ground. A common use is in power supplies where a bypass capacitor is connected in parallel with the main filter capacitor to shunt noise and other high frequency interference to ground which the main capacitor may not be able to do.
What is the function for tantalum capacitor?
the same as any capacitor tantalum has a very high dielectric constant so these are smaller physically the electrolite is solid so the capacitance is very stable
What is the function of a refrigerator start capacitor and how does it contribute to the operation of the appliance?
The function of a refrigerator start capacitor is to provide an extra boost of power to the compressor motor when the refrigerator is turned on. This helps the motor start up quickly and efficiently, allowing the appliance to cool down faster and maintain a consistent temperature. The start capacitor stores and releases energy to help the compressor motor overcome the initial resistance and get the refrigerator running smoothly.
What is the function of a refrigerator capacitor and how does it contribute to the overall operation of the appliance?
A refrigerator capacitor helps the compressor start and run efficiently by storing and releasing electrical energy. It provides the necessary power boost to kick-start the compressor, which is essential for cooling the refrigerator. Without the capacitor, the compressor may struggle to start or fail to operate properly, leading to issues with cooling the refrigerator.
What are the function of mica capacitor?
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What is function of capacitor in 555 IC?
the capacitor and its associated resistor set the time constant.
What is the function of the insulation refrigerator?
It keeps heat from outside the refrigerator from getting into the refrigerator.
What is the function of a capacitor's leads?
To connect it to the circuit.
Function of dielectric in a capacitor?
The main role of dielectrics in capacitors is to increase the value of capacitance of the capacitor.
What is the function that describes the current through a capacitor as a function of time?
The function that describes the current through a capacitor as a function of time is given by the equation I(t) C dV/dt, where I(t) is the current at time t, C is the capacitance of the capacitor, and dV/dt is the rate of change of voltage with respect to time.
What is the function of fixed capacitor?
A fixed capacitor has a fixed capacitance (within certain limits influenced by aging). So it can fulfill any function that a (variable) capacitor fulfills, beside changing its capacitance easily (e. g. by turning a wheel).
What is the function of mylar capacitor?
In electronic circuits a capacitor is used to pass AC and block DC.
Function of resistor capacitor and transistor on integrated circuit?
resistor
What two facctors determine the capacitive reactance of a capacitor?
The two factors that determine the capacitive reactance of a capacitor are the frequency of the AC voltage applied to the capacitor and the capacitance value of the capacitor. At higher frequencies and with larger capacitance values, the capacitive reactance decreases.
