Standing Waves - Oregon State EECS

... (b) Using pencil and paper, plot the voltage and current standing-wave patterns on the line for f0 = 10M Hz. (c) Determine the input impedance of the line if the operating frequency f0 is 10 MHz, 20 MHz, and 30 MHz. 3. An unknown load impedance Zt is connected to a lossless coaxial transmission line ...

... (b) Using pencil and paper, plot the voltage and current standing-wave patterns on the line for f0 = 10M Hz. (c) Determine the input impedance of the line if the operating frequency f0 is 10 MHz, 20 MHz, and 30 MHz. 3. An unknown load impedance Zt is connected to a lossless coaxial transmission line ...

introduction to transmission lines

... 2- For a 50 ohm lossless transmission line terminated in a load impedance ZL=100 + j50 ohm, determine the fraction of the average incident power reflected by the load. Also, what is the magnitude of the average reflected power if |Vo|=1? 3- Make sure you understand the slotted line problem. 4- Compl ...

... 2- For a 50 ohm lossless transmission line terminated in a load impedance ZL=100 + j50 ohm, determine the fraction of the average incident power reflected by the load. Also, what is the magnitude of the average reflected power if |Vo|=1? 3- Make sure you understand the slotted line problem. 4- Compl ...

PHYS - 321 ELEMENTARY ELECTRONiCS

... A signal generator has an internal resistance called output Impedance z. ( z~50 Ohm ). A voltage divider circuit can be used to measure r and z. Adjust R until ΔVR=1/2V ! Then R = z ! ...

... A signal generator has an internal resistance called output Impedance z. ( z~50 Ohm ). A voltage divider circuit can be used to measure r and z. Adjust R until ΔVR=1/2V ! Then R = z ! ...

RF-Microwaves formulas - 1

... On a Smith Chart, one plots normalized impedances if referring to the curved axes, it is also possible with a protractor and a ruler to enter s-parameters as magnitude and angle, as would be done on the polar plot. The complete smith chart has an angle scale all around it for that purpose, and at th ...

... On a Smith Chart, one plots normalized impedances if referring to the curved axes, it is also possible with a protractor and a ruler to enter s-parameters as magnitude and angle, as would be done on the polar plot. The complete smith chart has an angle scale all around it for that purpose, and at th ...

TRANSMISSION LINES

... There are 3 main causes of Insertion Loss: Reflected losses, Dielectric losses and Copper losses. Reflected losses are those losses caused by the VSWR of the connector. Dielectric losses are those losses caused by the power dissipated in the dielectric materials (Teflon, Rexolite, Delrin, etc.). Cop ...

... There are 3 main causes of Insertion Loss: Reflected losses, Dielectric losses and Copper losses. Reflected losses are those losses caused by the VSWR of the connector. Dielectric losses are those losses caused by the power dissipated in the dielectric materials (Teflon, Rexolite, Delrin, etc.). Cop ...

Transmission Line Theory

... A short circuit is placed at the load plane, resulting in a standing wave on the line with infinite SWR, and sharply defined voltage minima recorded at z=0.2 cm, 2.2cm, 4.2cm The short circuit is removed, and replaced with the unknown load. The SWR is measured as 1.5, and voltage minima are recorded ...

... A short circuit is placed at the load plane, resulting in a standing wave on the line with infinite SWR, and sharply defined voltage minima recorded at z=0.2 cm, 2.2cm, 4.2cm The short circuit is removed, and replaced with the unknown load. The SWR is measured as 1.5, and voltage minima are recorded ...

Lecture 7-3 Phasor Domain Analysis

... Circuits, Second Edition by Fawwaz T. Ulaby and Michel M. Maharbiz, © NTS rights reserved. Do notby copythe or distribute. © 2013 National Technology and Science Press Press, Used withAllPermission Publisher ...

... Circuits, Second Edition by Fawwaz T. Ulaby and Michel M. Maharbiz, © NTS rights reserved. Do notby copythe or distribute. © 2013 National Technology and Science Press Press, Used withAllPermission Publisher ...

ELECTROMAGNETICS EXERCISE

... When a voltage reading is taken in an RF circuit, that reading refers to the voltage at that particular point on the line. What many people do not know is that the reading is actually the sum of two separate voltages: the forward-traveling voltage and the reverse-traveling voltage. Since RF signals ...

... When a voltage reading is taken in an RF circuit, that reading refers to the voltage at that particular point on the line. What many people do not know is that the reading is actually the sum of two separate voltages: the forward-traveling voltage and the reverse-traveling voltage. Since RF signals ...

HA # 3

... (a) Is this network lossless? (b) Is this network reciprocal? (c) What is the return loss at port 1 when all other ports are terminated with matched loads? (d) What is the insertion loss and phase delay between ports 2 and 4 when all other ports are terminated with matched loads? ...

... (a) Is this network lossless? (b) Is this network reciprocal? (c) What is the return loss at port 1 when all other ports are terminated with matched loads? (d) What is the insertion loss and phase delay between ports 2 and 4 when all other ports are terminated with matched loads? ...

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.