if a transmit and a rceive anttena are both aquare with the same size , are...
if a transmit and a rceive anttena are both aquare with the same size , are separated by 100m, and the frequency is 900 MHz,what is the maximum area of these antennas for which Friis'Law is valid?
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if a transmit and a rceive anttena are both aquare with the same
size , are...
Problem 5 The configuration shown below depicts two vertically oriented half-wave dipole antennas...
Problem 5 The configuration shown below depicts two vertically oriented half-wave dipole antennas pointed towards each other, with both positioned on 100-m-tall towers separated by a distance of 5 km. If the transmit antenna is driven by a 50-MHz current with amplitude Io 2 A, determine: Reflecied 100m (a) The power received by the receive antenna in the absence of the surface. (Assume both antennas to be lossless.) (b) The power received by the receive antenna after incorporating reflection by...
QUESTION 20 What is/are some frequency reuse strategy(ies) used with satellites? a. use of highly direction...
QUESTION 20 What is/are some frequency reuse strategy(ies) used with satellites? a. use of highly direction antennas to create spot beams b. use of orthogonal signal polarizations (i.e., polarization isolation) c. both a and b d. neither a nor b Select the correct statement(s) regarding satellite transponders. a. A satellite has several transponders that are separated by frequency channels b. Transponders typically share the same satellite antennas and LNAs (Low Noise Amplifiers) c. A transponder is a series of interconnected...
Please help me 9.) Two antennas, 6 meters (m) apart, transmit coherent, monochromatic radio waves, to...
Please help me
9.) Two antennas, 6 meters (m) apart, transmit coherent, monochromatic radio waves, to two receivers, A and B. Receiver A is the same distance from both antennas (about 8.5 m). Receiver B is 8m from one antenna, and 10m from the other I both antennas transmit 3m waves with wavelength of 1.0 meters, then what type of interference will be experienced by the receivers? 8 A) receiver A: constructive; receiver B: constructive B.) receiver A: constructive; receiver...
An astronomical radio telescope consists of two antennas separated by a distance of 206 m. Both...
An astronomical radio telescope consists of two antennas
separated by a distance of 206 m. Both antennas are tuned to the
frequency of 24 MHz. The signals from each antenna are fed into a
common amplifier, but one signal first passes through a phase
selector that delays its phase by a chosen amount so that the
telescope can "look" in different directions. When the phase delay
is zero, plane radio waves that are incident vertically on the
antennas produce signals...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace (channel). 6. (10 marks) You are given a channel of transmission bandwidth 5 kHz, over which you must transmit a 6.25 kb/s data stream using baseband 2-ASK. For a raised-cosine pulse shape: (a) Calculate the maximum possible roll-off factor that can be used. (b) Calculate the f1 frequency. (c) Calculate the excess bandwidth. (d) Sketch and label the spectrum of the raised-cosine filter.
a) What is the value in dB of the free-space loss for a carrier frequency of...
a) What is the value in dB of the free-space loss for a carrier frequency of 900 MHz and a range of 10 km? (b) The effective isotropic radiated power (EIRP) is 1 W. Assume that both the transmitting and receiving antennas are isotropic and that there are no other losses. The noise N0 = N/W = κTo is −174 dBm/Hz. The EIRP is 1 W. The bandwidth is 20 MHz and the bit rate per Hz of bandwidth is...
Interference waves of sound
1. Two loudspeakers 6.0 m apart are playing the same frequency. If you stand 10.0 m in front of the plane of the speakers, centered between them, you hear a sound ofmaximum intensity. As you walk parallel to the plane of the speakers, staying 10.0 in front of them, you first hear a minimum of sound intensity when you are directlyin front of one of the speakers. What is the frequency of the sound? Assume a sound speed of 340...
- In male fiddler crabs both claws are the same size when they are juveniles. As...
- In male fiddler crabs both claws are the same size when they are juveniles. As the males grow their body parts all grow at the same rate except one of the claws which is ~3 times the size of the other claw. Which line on the graph shown would you expect if you were to compare growth in body size to growth in the larger claw from juvenile to adult? M. In Y vl - - - - -...
Light of wavelength 459 nm falls on two slits spaced 0.280 mm apart. What is the...
Light of wavelength 459 nm falls on two slits spaced 0.280 mm apart. What is the required distance from the slit to a screen if the spacing between the first and second dark fringes is to be 4.00 mm? m MY NOTES PRACTICE ANOTHER 5. [-/10 Points) DETAILS SERCP7 24.P.007 Two radio antennas separated by d - 277 m, as shown in Figure P24.7, simultaneously transmit identical signals of the same wavelength. A radio in a car traveling due north...
Q5 (20 pts): Two radio antennas separated by 300 m simultaneously broadcast identical signals at the...
Q5 (20 pts): Two radio antennas separated by 300 m simultaneously broadcast identical signals at the same wavelength. A radio in a car traveling due north receives the signals. a. (10 points) If the car is at the position of the third maximum, and makes 25° above the central axis, what is the wavelength of the signals? 900 m 25° 300 m b. (10 points) How much farther must the car travel to encounter the next maximum in reception?
Problem 5 The configuration shown below depicts two vertically oriented half-wave dipole antennas pointed towards each other, with both positioned on 100-m-tall towers separated by a distance of 5 km. If the transmit antenna is driven by a 50-MHz current with amplitude Io 2 A, determine: Reflecied 100m (a) The power received by the receive antenna in the absence of the surface. (Assume both antennas to be lossless.) (b) The power received by the receive antenna after incorporating reflection by...
Please help me
9.) Two antennas, 6 meters (m) apart, transmit coherent, monochromatic radio waves, to two receivers, A and B. Receiver A is the same distance from both antennas (about 8.5 m). Receiver B is 8m from one antenna, and 10m from the other I both antennas transmit 3m waves with wavelength of 1.0 meters, then what type of interference will be experienced by the receivers? 8 A) receiver A: constructive; receiver B: constructive B.) receiver A: constructive; receiver...
An astronomical radio telescope consists of two antennas
separated by a distance of 206 m. Both antennas are tuned to the
frequency of 24 MHz. The signals from each antenna are fed into a
common amplifier, but one signal first passes through a phase
selector that delays its phase by a chosen amount so that the
telescope can "look" in different directions. When the phase delay
is zero, plane radio waves that are incident vertically on the
antennas produce signals...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace (channel). 6. (10 marks) You are given a channel of transmission bandwidth 5 kHz, over which you must transmit a 6.25 kb/s data stream using baseband 2-ASK. For a raised-cosine pulse shape: (a) Calculate the maximum possible roll-off factor that can be used. (b) Calculate the f1 frequency. (c) Calculate the excess bandwidth. (d) Sketch and label the spectrum of the raised-cosine filter.
- In male fiddler crabs both claws are the same size when they are juveniles. As the males grow their body parts all grow at the same rate except one of the claws which is ~3 times the size of the other claw. Which line on the graph shown would you expect if you were to compare growth in body size to growth in the larger claw from juvenile to adult? M. In Y vl - - - - -...
Light of wavelength 459 nm falls on two slits spaced 0.280 mm apart. What is the required distance from the slit to a screen if the spacing between the first and second dark fringes is to be 4.00 mm? m MY NOTES PRACTICE ANOTHER 5. [-/10 Points) DETAILS SERCP7 24.P.007 Two radio antennas separated by d - 277 m, as shown in Figure P24.7, simultaneously transmit identical signals of the same wavelength. A radio in a car traveling due north...
Q5 (20 pts): Two radio antennas separated by 300 m simultaneously broadcast identical signals at the same wavelength. A radio in a car traveling due north receives the signals. a. (10 points) If the car is at the position of the third maximum, and makes 25° above the central axis, what is the wavelength of the signals? 900 m 25° 300 m b. (10 points) How much farther must the car travel to encounter the next maximum in reception?
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