A line-of-sight radio link operating at a frequency of 0.006 THz has a separation of 40 km between antennas. An obstacle in the path is located 10 km from the transmitting antenna. Determine d2 and how much must the beam clear the obstacle?
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A line-of-sight radio link operating at a frequency of 0.006 THz has a separation of 40 km between antennas. An obstacle in the path is located 10 km from the transmitting antenna. Determine d2 and how much must the beam clear the obstacle?
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- The directivity of an antenna is 12 dB. What will be the beam solid angle of the antenna? Express the answer in steradian.At a certain time, the maximum usable frequency (MUF) for transmission at an angle of incidence of 75° is 20MHz. A) What is the critical frequency in MHz? (Use two decimal places for the final answer) B) What will be the optimum working frequency (OWF) in MHz? (Use two decimal places for the final answer)What circuit Q is required to give a bandwidth of 56 MHz at a frequency of 44 GHz? Round the final answer to three decimal places.
- If the directivity of an antenna is 25 dB at 2.5 GHz, then what will be the effective aperture of the antenna?Show that the directivity of isotropic antenna is 1.The radio path (f = 900 MHz) between a mobile phone and the base station has a loss of 30 dB in addition to the free space loss. The base station measures the level of the signal transmitted by the phone, and it sends the phone a command to set the transmit power to a level, which gives a received power level of-90 dBm. The antenna gain of the phone is 2 dB and the receive gain of the base station antenna is 7 dB. The distance between the phone and the base station is 500 m. What will be the transmit power level of the phone?
- An antenna with a radiation resistance of 48 Q, a loss resistance of 20 and a reactance of 50 Q is connected to a generator with an open circuit voltage of 10 V and internal impedance of 50 through a transmission line with a characteristic impedance of 100 . Determine the power supplied by the generator and power radiated by the antenna.An antenna used for transmitting has a power gain of 20, directive gain of 22, and an input power of 200 W. Determine: 1.EIRP in W, dBm and dBW. 2.Power density at a distance of 5 km from the antenna along the direction of maximum radiation. 3.Antenna efficiency 4. Radiated power from an antenna 5.Radiation resistance and antenna effective resistance if current at feedpoint is 2 A.An isotropic antenna is radiating evenly in the r–direction in free space. The totalelectric field (E0) is 20 V/m at 1-m distance. Determine the following parameters at adistance of 139 m from the antenna. (iii)Find The total radiated power.
- A radar antenna used for both transmitting and receiving has a gain of 200 at itsoperating frequency of 9GHz.it transmits 100KW and is aligned for maximumdirectional radiation and reception to a target 2 km away having a radar cross sectionof 3 m2.The received signal matches the polarization of the transmitted signal. Find thereceived signal.A transmit antenna with At = 10 and a Pin = 100W. Determine: a.) EIRP in watts b.) Power Density at 10 km from transit antenna c.) Power Density had an antenna been used with some input power and efficiencyThe PCB monopole antenna shown in figure below is required to be designed for Bluetooth Low Energy wireless mouse operating at 2.45 GHz. What should be the length of the antenna trace in mm. Assume the substrate of the PCB is foam (dielectric constant = 1)