Current-Phase relation
... MHz. With Q = 150 the tank circuit served to improve the match of the low impedance of the ring to that of the rf amplifier. As shown in Fig. 4, an rf oscillator coupled to the tank through an extremely small capacitor provided a constant current source. To set the phase p a steady external flux 4d, ...
... MHz. With Q = 150 the tank circuit served to improve the match of the low impedance of the ring to that of the rf amplifier. As shown in Fig. 4, an rf oscillator coupled to the tank through an extremely small capacitor provided a constant current source. To set the phase p a steady external flux 4d, ...
lecture-7.antenna
... large horn antennas. The system must be capable of controlling the polarization. Continuous rotation of the polarization can be accomplished by mounting a linearly polarized source antenna on a polarization positioner. Antennas with circular polarization can also be designed, such as crossed log-per ...
... large horn antennas. The system must be capable of controlling the polarization. Continuous rotation of the polarization can be accomplished by mounting a linearly polarized source antenna on a polarization positioner. Antennas with circular polarization can also be designed, such as crossed log-per ...
Section 33
... maximum voltage ΔVmax = 100 V. This power supply is connected to a 24.0-Ω resistor, and the current and resistor voltage are measured with an ideal AC ammeter and voltmeter, as shown in Figure P33.3. What does each meter read? Note that an ideal ammeter has zero resistance and that an ideal voltmete ...
... maximum voltage ΔVmax = 100 V. This power supply is connected to a 24.0-Ω resistor, and the current and resistor voltage are measured with an ideal AC ammeter and voltmeter, as shown in Figure P33.3. What does each meter read? Note that an ideal ammeter has zero resistance and that an ideal voltmete ...
Design and Implementation of Improved Electronic Load Controller
... Kuo and Wang have proposed the analysis of isolated selfinduction generator feeding a rectifier load [11]. Wildi has proposed the voltage and frequency control of an autonomous Induction Generator (IG). A Voltage Source Inverter (VSI) with a Dump Load (DL) circuit is employed in its DC side. The IG ...
... Kuo and Wang have proposed the analysis of isolated selfinduction generator feeding a rectifier load [11]. Wildi has proposed the voltage and frequency control of an autonomous Induction Generator (IG). A Voltage Source Inverter (VSI) with a Dump Load (DL) circuit is employed in its DC side. The IG ...
ELECTROMAGNETIC PULSE PROPAGATION OVER
... integral term kernel N (s − η) can be easily calculated for different ε and σ. For ε > 3.15, function N (s) monotonously tends to zero with increasing s - see Fig. 10. It is interesting to note that in both limiting cases: perfectly conducting boundary σ = ∞ and zero soil conductivity (σ = 0) Eq. (34 ...
... integral term kernel N (s − η) can be easily calculated for different ε and σ. For ε > 3.15, function N (s) monotonously tends to zero with increasing s - see Fig. 10. It is interesting to note that in both limiting cases: perfectly conducting boundary σ = ∞ and zero soil conductivity (σ = 0) Eq. (34 ...
PGD NOTE 3,4 module
... Fig shows a typical primary distribution system. Electric power from the generating station is transmitted at high voltage to the substation located in or near the city. At this substation, voltage is stepped down to 11 kV with the help of step-down transformer. Power is supplied to various substati ...
... Fig shows a typical primary distribution system. Electric power from the generating station is transmitted at high voltage to the substation located in or near the city. At this substation, voltage is stepped down to 11 kV with the help of step-down transformer. Power is supplied to various substati ...
Signal Generators - University of Saskatchewan
... can also be created. This generator can do frequency sweeps and different forms of modulation. The generator can also be programmed over the remote interface. The standard waveform functions are used in the laboratory classes. This generator will limit the maximum and minimum values. These values wi ...
... can also be created. This generator can do frequency sweeps and different forms of modulation. The generator can also be programmed over the remote interface. The standard waveform functions are used in the laboratory classes. This generator will limit the maximum and minimum values. These values wi ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.