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cross-section of the conductor and thus increases its effective resistance. At 60 Hz in copper, skin depth is about 8.5 mm. At high frequencies, skin depth...47 KB (6,447 words) - 15:53, 7 May 2024
and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current...82 KB (10,868 words) - 03:17, 19 March 2024
the 1920s, practical work on radio waves concentrated on the low frequency end of the radio spectrum, as these frequencies were better for long-range communication...34 KB (3,523 words) - 04:33, 5 December 2023
Electrical impedance (redirect from Electric effective resistance)addition to resistance as seen in DC circuits, impedance in AC circuits includes the effects of the induction of voltages in conductors by the magnetic...32 KB (5,061 words) - 19:26, 7 April 2024- Radiation resistance is that part of an antenna's feedpoint electrical resistance caused by the emission of radio waves from the antenna. A radio transmitter...32 KB (3,945 words) - 21:51, 8 May 2024
Litz wire (section Principle of operation)skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz. It consists of many thin wire strands, individually insulated...15 KB (1,859 words) - 14:02, 9 November 2023
AC resistance of adjacent conductors when compared to their resistance with a DC current. The effect increases with frequency. At higher frequencies, the...15 KB (1,878 words) - 03:59, 22 May 2024- Semiconductor (redirect from Semi-Conductors)the invention of the transistor in 1947 and the integrated circuit in 1958. Semiconductors in their natural state are poor conductors because a current...46 KB (5,377 words) - 04:54, 29 April 2024
- defined for conductors carrying alternating current (AC) at a single frequency or narrow band of frequencies. An alternating electric current of a single...44 KB (5,298 words) - 21:23, 8 May 2024
- Understanding the effects of varying conditions on radio propagation has many practical applications, from choosing frequencies for amateur radio communications...27 KB (3,433 words) - 01:39, 19 May 2024
Transmission line (redirect from Radio-frequency transmission line)when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering...50 KB (6,955 words) - 20:26, 2 May 2024
Alternating current (redirect from AC frequency)of conductors reduces the effective cross-section of the conductor. This increases the effective AC resistance of the conductor, since resistance is inversely...47 KB (5,943 words) - 02:56, 16 May 2024
Inductor (redirect from Applications of inductors)vibration of the windings can cause variations in the inductance. At high frequencies, particularly radio frequencies (RF), inductors have higher resistance and...59 KB (6,820 words) - 00:39, 15 May 2024
Coaxial cable (category Antennas (radio))low frequencies. At higher frequencies, skin effect increases the effective resistance by confining the conduction to a thin layer of each conductor. Shunt...78 KB (8,252 words) - 02:52, 10 May 2024
Speaker wire (section Resistance)resistant at higher frequencies, diminishing its ability to transmit high frequencies with as much power as low frequencies. As cable conductors increase...28 KB (2,920 words) - 17:13, 7 May 2024
capacitors contain at least two electrical conductors, often in the form of metallic plates or surfaces separated by a dielectric medium. A conductor may be a foil...122 KB (15,215 words) - 17:32, 10 May 2024
Dipole antenna (category Radio frequency antenna types)normally much larger than the resistance of the conductors, so that their efficiency approaches 100%. In general radio engineering, the term dipole, if...88 KB (12,381 words) - 23:49, 13 May 2024
electrical resistance in the coil and as much as possible in the pan so that most of the heat is developed in the pan. At the frequencies typically used...37 KB (4,581 words) - 06:03, 11 May 2024
Ferrite bead (section Theory of operation)circuits. Beads can block low-level unintended radio frequency energy on wires intended to be DC conductors by acting as a low-pass filter. For example,...8 KB (889 words) - 17:41, 9 April 2024
Input impedance (redirect from Input resistance)the input impedance of an electrical network is the measure of the opposition to current (impedance), both static (resistance) and dynamic (reactance)...10 KB (1,396 words) - 16:45, 11 November 2023
- would consume the same amount of power as that radiated by the antenna. RADIO FREQUENCIES—Electromagnetic frequencies that fall between 3 kilohertz and
- Very High Frequency, and Their Application to Methods of Artificial Illumination" (20 May 1891) Alternate currents, especially of high frequencies, pass with
- Electronics/Capacitors (redirect from Amateur Radio Manual/Capacitance)internal imbalance of electric charge. It is made of two conductors separated by a dielectric (insulator). Using the same analogy of water flowing through