EEE 302 Lecture 11 - Universitas Udayana
... coil (inductor) so that if the currents are entering (or leaving) both dotted terminals, then the fluxes add • right hand rule says that curling the fingers (of the right hand) around the coil in the direction of the current gives the direction of the magnetic flux based on the direction of the thum ...
... coil (inductor) so that if the currents are entering (or leaving) both dotted terminals, then the fluxes add • right hand rule says that curling the fingers (of the right hand) around the coil in the direction of the current gives the direction of the magnetic flux based on the direction of the thum ...
review for elec 105 midterm exam #1 (fall 2001)
... The following is a list of topics that could appear in one form or another on the exam. Not all of these topics will be covered, and it is possible that an exam problem could cover a detail not specifically listed here. However, this list has been made as comprehensive as possible. You should be fam ...
... The following is a list of topics that could appear in one form or another on the exam. Not all of these topics will be covered, and it is possible that an exam problem could cover a detail not specifically listed here. However, this list has been made as comprehensive as possible. You should be fam ...
Lecture 27 Slides - Digilent Learn site
... impedance must be the complex conjugate of the Thévenin impedance ...
... impedance must be the complex conjugate of the Thévenin impedance ...
1893 Operation without Magnetics
... This note is applicable to ICS1893AF / ICS1893Y-10 / ICS1893BF Text in Black applies to ICS1893AF / ICS1893Y-10, Text in RED applies to 1893BF The following changes are made to the twisted pair circuits for operation without Magnetics. All other circuit components not involved with the twisted pair ...
... This note is applicable to ICS1893AF / ICS1893Y-10 / ICS1893BF Text in Black applies to ICS1893AF / ICS1893Y-10, Text in RED applies to 1893BF The following changes are made to the twisted pair circuits for operation without Magnetics. All other circuit components not involved with the twisted pair ...
Revision AC
... Impedance: A ratio between voltage and current phasors – it is a complex number but NOT a phasor ...
... Impedance: A ratio between voltage and current phasors – it is a complex number but NOT a phasor ...
instruments and methods - International Glaciological Society
... ABSTRACT. Radio echo-sounding equipment has been designed, and used for depth sounding on temperate glaciers in Iceland. Two devices have been built. Mark I operates in the frequency band 2 to 5 MHz. The overall range is 100 to I 000 m. The arrival of the echo can be timed with an accuracy which cor ...
... ABSTRACT. Radio echo-sounding equipment has been designed, and used for depth sounding on temperate glaciers in Iceland. Two devices have been built. Mark I operates in the frequency band 2 to 5 MHz. The overall range is 100 to I 000 m. The arrival of the echo can be timed with an accuracy which cor ...
Communications
... rotated feed, the feed is set slightly off the focal point, and then is rotated around the focal point. The other method is involved is called a nutated feed, in which the feed is fixed and the reflector is rotated around the focal point. The primary difference between the two is polarization change ...
... rotated feed, the feed is set slightly off the focal point, and then is rotated around the focal point. The other method is involved is called a nutated feed, in which the feed is fixed and the reflector is rotated around the focal point. The primary difference between the two is polarization change ...
PowerPoint Sunusu
... circuit consisting of a resistor, an inductor, and a capacitor, connected in series or in parallel. • The RLC part of the name is due to those letters being the usual electrical symbols for resistance, inductance and capacitance respectively. • The circuit forms a harmonic oscillator for current and ...
... circuit consisting of a resistor, an inductor, and a capacitor, connected in series or in parallel. • The RLC part of the name is due to those letters being the usual electrical symbols for resistance, inductance and capacitance respectively. • The circuit forms a harmonic oscillator for current and ...
review for elec 105 midterm exam #1 (fall 2001)
... - available power (PA) from Thévenin equivalent circuit - power absorbed by load without 2-port network - power absorbed by load with 2-port network Concept of , VSWR, and return loss as measures of impedance match (with or w/o xmsn line) Pi and T network resistive attenuators Realistic models of r ...
... - available power (PA) from Thévenin equivalent circuit - power absorbed by load without 2-port network - power absorbed by load with 2-port network Concept of , VSWR, and return loss as measures of impedance match (with or w/o xmsn line) Pi and T network resistive attenuators Realistic models of r ...
AC Circuits - WordPress.com
... • Impedance of an inductor increases as frequency increases. • At dc (f = 0 Hz), inductor looks like a short. At high frequencies, it looks like an open. ...
... • Impedance of an inductor increases as frequency increases. • At dc (f = 0 Hz), inductor looks like a short. At high frequencies, it looks like an open. ...
Analysis Methods for Transient Circuits
... Analysis Methods for Transient Circuits Dr. Holbert March 17, 2008 ...
... Analysis Methods for Transient Circuits Dr. Holbert March 17, 2008 ...
RF Transmission Lines and Antennas
... 1. Regardless of their lengths, all transmission lines have resistance, inductance and capacitance. These can be combined and are called impedance. Resistance is simply the DC resistance of wire. Inductance is resistance to an AC voltage. Capacitance is resistance to AC current. These definitions ar ...
... 1. Regardless of their lengths, all transmission lines have resistance, inductance and capacitance. These can be combined and are called impedance. Resistance is simply the DC resistance of wire. Inductance is resistance to an AC voltage. Capacitance is resistance to AC current. These definitions ar ...
Project 1
... dedicated to crystal radios. Rectifier The rectifier of a crystal radio consists of a germanium diode and a resistor to ground as shown in Figure 3. A good germanium diode is the 1N34. The actual diode has a (usually black) color band on the cathode (the end that connects to the resistor). The resis ...
... dedicated to crystal radios. Rectifier The rectifier of a crystal radio consists of a germanium diode and a resistor to ground as shown in Figure 3. A good germanium diode is the 1N34. The actual diode has a (usually black) color band on the cathode (the end that connects to the resistor). The resis ...
Input Impedance of Dipole Antenna
... field B0, of 0.41G. For these conditions, the electron plasma frequency, fpe, is 1.27 MHz and the electron gyromagnetic frequency, fce, is 1.15 MHz. Therefore, transmission only occurs at operating frequencies above 1.27 MHz, when the plasma parameter X=( fpe/f)2 is less than 1 (Figure 2). Since the ...
... field B0, of 0.41G. For these conditions, the electron plasma frequency, fpe, is 1.27 MHz and the electron gyromagnetic frequency, fce, is 1.15 MHz. Therefore, transmission only occurs at operating frequencies above 1.27 MHz, when the plasma parameter X=( fpe/f)2 is less than 1 (Figure 2). Since the ...
Feed lines
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
Feed lines
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
Feed lines
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
feedlines
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
... AC current and which varies inversely as the operating frequency which means the value stays approximately the same over any given length. This value is called the characteristic impedance of the circuit. (Zo) –At HF frequencies, the signal passes through the conductor while at frequencies above 10 ...
The Tenna-Tune
... thinking that an antenna tuner is connected, and so the radio will be keyed in the 10-watt cw mode whenever the “key” pin (pin 1 on the antenna tuner interface) is connected to ground by the SPST toggle switch. I mounted the 10K ohm resistor directly on the 4-pin plug so only two wires are necessary ...
... thinking that an antenna tuner is connected, and so the radio will be keyed in the 10-watt cw mode whenever the “key” pin (pin 1 on the antenna tuner interface) is connected to ground by the SPST toggle switch. I mounted the 10K ohm resistor directly on the 4-pin plug so only two wires are necessary ...
TRANSMISSION LINES
... SWR is not an indication of transmission line efficiency. If you have low transmission system losses, high SWRs can be tolerated, with a transmatch or utilizing a low matched loss transmission line. If you have high attenuation from line, connectors or devices, you need to tightly control SWR. ...
... SWR is not an indication of transmission line efficiency. If you have low transmission system losses, high SWRs can be tolerated, with a transmatch or utilizing a low matched loss transmission line. If you have high attenuation from line, connectors or devices, you need to tightly control SWR. ...
Homework Assignment #4 - facstaff.bucknell.edu
... information, if any. Provide the details of all solutions, including important intermediate steps. You will not receive credit if you do not show your work. Prob. 2.33: Impedances Zin1 and Zin2 are the input impedances measured at the inputs of the upper and lower lines, respectively. Prob. 2.39: A ...
... information, if any. Provide the details of all solutions, including important intermediate steps. You will not receive credit if you do not show your work. Prob. 2.33: Impedances Zin1 and Zin2 are the input impedances measured at the inputs of the upper and lower lines, respectively. Prob. 2.39: A ...
Antenna tuner
An antenna tuner, a matchbox, transmatch, antenna tuning unit (ATU), or antenna coupler is a device connected between a radio transmitter or receiver and its antenna to improve power transfer between them by matching the impedance of the radio to the antenna’s feedline. Similar matching networks are used in other equipment (such as linear amplifiers) to transform impedance.An antenna’s impedance is different at different frequencies. An antenna tuner matches a radio with a fixed impedance (typically 50 Ohms for modern transceivers) to the combination of the feedline and the antenna; useful when the antenna’s feedline impedance is unknown, complex, or otherwise different from the transceiver. Coupling through an ATU allows the use of one antenna on a broad range of frequencies. However, despite its name, an antenna ‘tuner’ actually only matches to the antenna feedline – an antenna ‘tuner’ does not and cannot change the resonant frequency of the aerial.Operating an antenna far from its design frequency and compensating with a transmatch is not as efficient as using a resonant antenna with a matched-impedance feedline. If there is still a high SWR (multiple reflections) in the feedline beyond the ATU, any loss in the feedline increases, heating the wire instead of sending out a signal. Additionally, losses in the ATU itself can also waste power.