A λ/2 dipole, with a total loss resistance of 1 ohm, is connected to a generator...
A λ/2 dipole, with a total loss resistance of 1 ohm, is connected to a generator whose internal impedance is 25 + j25 ohms via a 50-ohm λ/2-long lossless transmission line. Assuming that the peak voltage of the generator is 2 V and the impedance of the dipole, excluding the loss resistance, is 73 + j42.5 ohms, find the power
a) supplied by the source (real)
b) radiated by the antenna
c) dissipated by the antenna
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A λ/2 dipole, with a total loss resistance of 1 ohm, is
connected to a generator...
Question 1 The power radiated by a lossless antenna is 10 watts.
Question 1 The power radiated by a lossless antenna is 10 watts. The directional characteristics of the antenna are represented by the radiation intensity of U = 2cos3θ watts/unit solid angle. Find the (a) Maximum power density at a distance of 1000 m (assume far-field distance) (b) Maximum directivity (c) Maximum gain Question 2 In target-search ground-mapping radars it is desirable to have echo power received from a target, of constant cross section, to be independent ofits range. For one such application, the desirable radiation intensity...
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is ...
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of the antenna is given approximately by U Bo sin30 Find the maximum absolute gain of the antenna. Answer. 2.3 dBi]
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of...
Please show all steps 2.60. A 1-m long dipole antenna is driven by a 150 MHz...
Please show all steps
2.60. A 1-m long dipole antenna is driven by a 150 MHz source having a source resistance of 50 ohms and a voltage of 100 V. If the ohmic resistance of the antennas is given by RL 0.625 ohms, find the: (a) Current going into the antenna (/ant) (b) Power dissipated by the antenna (c) Power radiated by the antenna (d) Radiation efficiency of the antenna
1. Consider a source driving the antenna model in the circuit below. The source has a voltage of 100Vrms and an impedance of RS 50 ohs. The antenna has an impedance of Z RRadRLoss+jX where the radiat...
1. Consider a source driving the antenna model in the circuit below. The source has a voltage of 100Vrms and an impedance of RS 50 ohs. The antenna has an impedance of Z RRadRLoss+jX where the radiation resistance RRad-3 ohms, the loss resistance RLoss-12 ohms, and the reactance jXj150 ohms. (a) What is the efficiency of the antenna? (This miserable efficiency is actually better than many electrically-small antennas.) (b) How much power is being radiated? (c) How much power would...
A lossless, resonant, center-fed half-wavelength (1/2) linear dipole, radiating in free-space is attached to a lossless...
A lossless, resonant, center-fed half-wavelength (1/2) linear dipole, radiating in free-space is attached to a lossless transmission line whose characteristic impedance is 75 2. This dipole antenna has a radius of 0.03 2. Calculate the reflection coefficient and discuss how to improve the impedance matching.
3. (30 points) In an RLC circuit with a resistance of 100 ohm connected to an...
3. (30 points) In an RLC circuit with a resistance of 100 ohm connected to an AC power source with an amplitude of 80 V, the current reaches a maximum prior to the supplied voltage, which is only at 75% of it's maximum when the current is at a maximum. (a) (11 points) What is the phase constant of the circuit? (b) (8 points) Is the circuit more inductive or more capacitive? (c) (11 points) What is the average power...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length If such a dipole is placed along the z-axis with its midpoint at the origin, and if the current flowing through it is i(t) ż lo cosot, assume I to be sufficiently small so that the observation point is approximately equidistant to all points on the dipole; that is, assume RR then the corresponding magnetic field is described by: olk2 sin e...
1.1 (3 marks) A single-phase power system consists of a 480 volt 60 Hz generator supplying...
1.1 (3 marks) A single-phase power system consists of a 480 volt 60 Hz generator supplying a load of 4 + j 3 ohms through a transmission line whose impedance is 0.18 + j 0.24 ohm. The generator impedance may be neglected. 1.1.1 Determine the transmission loss (power loss in the transmission line resistance. (1 mark) 1.1.2 Redo the 1.1.1 when the following is done to the power system. The generated voltage is stepped up ten times by using an...
1) A lossless transmission line that is 3N2 long with an impedance of 75Ω terminated by a load of...
1) A lossless transmission line that is 3N2 long with an impedance of 75Ω terminated by a load of 25 Ω The generator has a voltage of V,r-2sin(et) V and an internal impedance Ζ'50Ω (a) For this circuit give Vg, T, and the voltage standing wave ratio. (b) Give Vin. Inand Vo (c) Give and I (d) Give the voltage and current at the midpoint of the line (ie. P(z) and I(2) at z-3/4). (e) From the answer of (d)...
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through...
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through the wire and the temperature rises to 90°C. Determine the resistance of the wire at 90°C, assuming that the temperature coefficient of resistance * .is 0.004/-C at 0 C 201.666 Ohm O 352.778 Ohm O 232.232 Ohm O 220 Ohm O 251.85 Ohm O 521.65 Ohm O Q5/// The maximum power dissipated in a 4 load is 100 w when connected to a d.c....
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of the antenna is given approximately by U Bo sin30 Find the maximum absolute gain of the antenna. Answer. 2.3 dBi]
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of...
Please show all steps
2.60. A 1-m long dipole antenna is driven by a 150 MHz source having a source resistance of 50 ohms and a voltage of 100 V. If the ohmic resistance of the antennas is given by RL 0.625 ohms, find the: (a) Current going into the antenna (/ant) (b) Power dissipated by the antenna (c) Power radiated by the antenna (d) Radiation efficiency of the antenna
1. Consider a source driving the antenna model in the circuit below. The source has a voltage of 100Vrms and an impedance of RS 50 ohs. The antenna has an impedance of Z RRadRLoss+jX where the radiation resistance RRad-3 ohms, the loss resistance RLoss-12 ohms, and the reactance jXj150 ohms. (a) What is the efficiency of the antenna? (This miserable efficiency is actually better than many electrically-small antennas.) (b) How much power is being radiated? (c) How much power would...
A lossless, resonant, center-fed half-wavelength (1/2) linear dipole, radiating in free-space is attached to a lossless transmission line whose characteristic impedance is 75 2. This dipole antenna has a radius of 0.03 2. Calculate the reflection coefficient and discuss how to improve the impedance matching.
3. (30 points) In an RLC circuit with a resistance of 100 ohm connected to an AC power source with an amplitude of 80 V, the current reaches a maximum prior to the supplied voltage, which is only at 75% of it's maximum when the current is at a maximum. (a) (11 points) What is the phase constant of the circuit? (b) (8 points) Is the circuit more inductive or more capacitive? (c) (11 points) What is the average power...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length If such a dipole is placed along the z-axis with its midpoint at the origin, and if the current flowing through it is i(t) ż lo cosot, assume I to be sufficiently small so that the observation point is approximately equidistant to all points on the dipole; that is, assume RR then the corresponding magnetic field is described by: olk2 sin e...
1) A lossless transmission line that is 3N2 long with an impedance of 75Ω terminated by a load of 25 Ω The generator has a voltage of V,r-2sin(et) V and an internal impedance Ζ'50Ω (a) For this circuit give Vg, T, and the voltage standing wave ratio. (b) Give Vin. Inand Vo (c) Give and I (d) Give the voltage and current at the midpoint of the line (ie. P(z) and I(2) at z-3/4). (e) From the answer of (d)...
Q3/17 Some copper wire has a resistance of 200 Ohm at 20.C.A current is passed through the wire and the temperature rises to 90°C. Determine the resistance of the wire at 90°C, assuming that the temperature coefficient of resistance * .is 0.004/-C at 0 C 201.666 Ohm O 352.778 Ohm O 232.232 Ohm O 220 Ohm O 251.85 Ohm O 521.65 Ohm O Q5/// The maximum power dissipated in a 4 load is 100 w when connected to a d.c....
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