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Above the cutoff frequency, attenuation increases rapidly. This increases the flux linkages, without which the number of turns on the coil would need to be increased. The capacitively loaded antennas used at low frequencies have extremely narrow bandwidths, and therefore if the frequency is changed the loading coil must be adjustable to tune the antenna to resonance with the new transmitter frequency. The phenomenon of cutoff whereby frequencies above the cutoff frequency are not transmitted is an undesirable side effect of loading coils (although it proved highly useful in the development of filters). The shorter the distance between the coils, the higher the cut-off frequency. Using coils with parallel capacitors forms a filter with the topology of an m-derived filter and a band of frequencies above the cut-off is also passed. Loading coils inserted periodically in series with a pair of wires reduce the attenuation at the higher voice frequencies up to the cutoff frequency of the low-pass filter formed by the inductance of the coils (plus the distributed inductance of the wires) and the distributed capacitance between the wires.

A more engineer friendly rule of thumb is that the approximate requirement for spacing loading coils is ten coils per wavelength of the maximum frequency being transmitted. The Perm police haven't released much more information about the robotic officer, possibly because R Bot 001's debut was less than stellar. It could mean, however, that the story behind what we know about lightning and electricity today is as much as a myth as the idea that lightning never strikes the same place twice. The trauma and unease in its aftermath, however, is a bell that can't be un-rung, and many burglary victims never again feel safe in their own homes. However, in the midst of this dire situation, Cousins didn't lose his sense of humor. Without removal, for subscribers at an extended distance, e.g., over 4 miles (6.4 km) from the central office, DSL cannot be supported. For this reason, in most cases, some of the MAC functions will be assigned to a central processing unit (CPU) -- either the CPU in the cable modem or the CPU of the user's system. The operating system works hand-in-hand with a computer's hardware to create a true home-theater receiver with the media-storage, navigation, organization and integration functions of a PC.

This is especially true if you'd like to use all the great calling features that are so convenient! Equally important are other features such as the Audio Return Channel (ARC) which allows the display to send audio back to an audio receiver and speaker system. In this article, we will learn about the hardware and features that make the Xbox 360 a leap forward into the next generation of gaming consoles. One way to increase the moment of inertia would be to add more weight to the camera system, but this would make things harder for the cameraman. If your house is huge or you're a power hog who leaves the electronics on all day, you'll need a more intense solar setup. The loading coil is often placed at the base of the antenna, between it and the transmission line (base loading), but for more efficient radiation, it is sometimes inserted near the midpoint of the antenna element (center loading).

Monopole and dipole radio antennas are designed to act as resonators for radio waves; the power from the transmitter, applied to the antenna through the antenna's transmission line, excites standing waves of voltage and current in the antenna element. When so loaded the antenna presents a pure resistance to the transmission line, preventing energy from being reflected. The elevated currents waste energy by heating the wire, and can even overheat the transmitter. One of the tenets of Einstein's Theory of Special Relativity is that nothing can travel faster than the speed of light in a vacuum. This approximation can be arrived at by treating the loaded line as a constant k filter and applying image filter theory to it. The origin of the loading coil can be found in the work of Oliver Heaviside on the theory of transmission lines. To make an electrically short antenna resonant, a loading coil is inserted in series with the antenna. Series compensation can be thought of as an inductor connected to the circuit in series if it is supplying inductance to the circuit. To reduce losses due to high capacitance on long-distance bulk power transmission lines, inductance can be introduced to the circuit with a flexible AC transmission system (FACTS), a static VAR compensator, or a static synchronous series compensator.

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