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loop antenna
6- Design a lossless circular loop antenna operating at f = 10 GHz so...
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...
4c1) The closest integer number of turns so that the input impedance is nearly 100 ohms...
4c1) The closest integer number of turns so that the input
impedance is nearly 100 ohms
4c2)the overall efficiency of the antenna (using the number of
turns obtained in 4c1)
(4c) A N-tum resonant circular lossless loop, antenna. with a uniform current distribution and with a circumference of V10, is fed by a lossless balanced twin-lead transmission line with a characteristic impedance of 100 ohms, Neglecting proximity effects, determine the (4e1) the closest integer number of turns so that the...
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...
A source of vdr) 10./2cos(2π10,)V with internal impedance Z,-10+ j10Ω is connected via a 300m long lossless two-wir...
A source of vdr) 10./2cos(2π10,)V with internal impedance Z,-10+ j10Ω is connected via a 300m long lossless two-wire transmission line to a load of Z-100+j2002. The line parameters are D-10mm , d Imm , μ,-I,e,-4. a) Calculate the velocity and direction of propagation of the incident and reflected waves. b) Find the characteristic impedance and the input impedance of the line. c) Calculate the amplitude of the incident wave for voltage and current. d) Write the complete expressions for v(z,t)...
Problem 3-15. Steady-State Conditions on a Transmission Line ine Che Chap. 3 3-11. A certain telephone...
Problem 3-15.
Steady-State Conditions on a Transmission Line ine Che Chap. 3 3-11. A certain telephone cable has the following electrical characteristics: R = 40 /mi L = 1.1 mH/mi G = negligible C = 0.062 F/mi Loading coils are added which provide an additional inductance of 30 m / well as an additional resistance of 8 l/mi. Obtain the attenuation constan phase velocities at frequencies of 300 Hz and 3300 Hz. If the coil spacing is 1/6 at a...
please show calculations. the answers are 11mA, 4.8uC, and 1.0V A 50-turn circular coil (radius =...
please show calculations. the answers are 11mA, 4.8uC, and
1.0V
A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 ohm is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of this field varies with time according to B = A sin (at), where A = 80 mu T and alpha = 50 pi rad/s. What is the magnitude of the current induced in the coil at t...
3) A horizontal current loop with a diameter of 12cm has 80 winding turns and carries...
3) A horizontal current loop with a diameter of 12cm has 80 winding turns and carries a current of 1.3 amps in the clockwise direction when viewed from above. a) [4] Make a sketch of the magnetic fields b) [2] Find the magnetic field at the center. c) [2] Find the magnetic field along the axis, a distance of 3 cm from the center of the loop. 4) The earth’s north pole is a magnetic south pole. The field above...
Accuracy is important. Do not round intermediates and check the answer range to make sure you...
Accuracy is important. Do not round intermediates and check the
answer range to make sure you are correct.
Values:
[01] 2.08 [02]
68.47 [03] 0.239 [04] 1173.7 [05] 1403. [06] 53.8
THE CORRECT ANSWERS WILL BE IN THE FOLLOWING RANGES:
8-1a. 140, 220 Hz
8-1b. 40:0, 62:0 mA
8-2a. 70:0, 99:0 V
8-2b. 140:0, 160:0 V
8-2c. 60:0, 99:0 V
8-2d. 60:0, 90:0 V
8-3a. 40:0; 99:0 pF
8-3b. 100; 400 mV
8-3c. 1:00; 3:00 mV
8-4a. 100; 150 V...
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...
4c1) The closest integer number of turns so that the input
impedance is nearly 100 ohms
4c2)the overall efficiency of the antenna (using the number of
turns obtained in 4c1)
(4c) A N-tum resonant circular lossless loop, antenna. with a uniform current distribution and with a circumference of V10, is fed by a lossless balanced twin-lead transmission line with a characteristic impedance of 100 ohms, Neglecting proximity effects, determine the (4e1) the closest integer number of turns so that the...
A source of vdr) 10./2cos(2π10,)V with internal impedance Z,-10+ j10Ω is connected via a 300m long lossless two-wire transmission line to a load of Z-100+j2002. The line parameters are D-10mm , d Imm , μ,-I,e,-4. a) Calculate the velocity and direction of propagation of the incident and reflected waves. b) Find the characteristic impedance and the input impedance of the line. c) Calculate the amplitude of the incident wave for voltage and current. d) Write the complete expressions for v(z,t)...
Problem 3-15.
Steady-State Conditions on a Transmission Line ine Che Chap. 3 3-11. A certain telephone cable has the following electrical characteristics: R = 40 /mi L = 1.1 mH/mi G = negligible C = 0.062 F/mi Loading coils are added which provide an additional inductance of 30 m / well as an additional resistance of 8 l/mi. Obtain the attenuation constan phase velocities at frequencies of 300 Hz and 3300 Hz. If the coil spacing is 1/6 at a...
please show calculations. the answers are 11mA, 4.8uC, and
1.0V
A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 ohm is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of this field varies with time according to B = A sin (at), where A = 80 mu T and alpha = 50 pi rad/s. What is the magnitude of the current induced in the coil at t...
Accuracy is important. Do not round intermediates and check the
answer range to make sure you are correct.
Values:
[01] 2.08 [02]
68.47 [03] 0.239 [04] 1173.7 [05] 1403. [06] 53.8
THE CORRECT ANSWERS WILL BE IN THE FOLLOWING RANGES:
8-1a. 140, 220 Hz
8-1b. 40:0, 62:0 mA
8-2a. 70:0, 99:0 V
8-2b. 140:0, 160:0 V
8-2c. 60:0, 99:0 V
8-2d. 60:0, 90:0 V
8-3a. 40:0; 99:0 pF
8-3b. 100; 400 mV
8-3c. 1:00; 3:00 mV
8-4a. 100; 150 V...
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