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Determine the gain of a parabolic antenna in dBi with a diameter of 30 cm and...
Consider a lunar base with an X-Band transmitting parabolic antenna at frequency 10 GHz. The transmitter...
Consider a lunar base with an X-Band transmitting parabolic antenna at frequency 10 GHz. The transmitter power is 22 dB. Communications are maintained with the receiving ground station on Earth that is equipped with a 12-foot-diameter dish antenna. 1. What is the wavelength of the radio waves? 2. What is the gain of the transmitter in dB? 3. Assume atmospheric loss is -3dB, what is the gain of the receiving antenna?
12.38. A lossless circular aperture antenna has a gain of 15 dB and overall physical area...
12.38. A lossless circular aperture antenna has a gain of 15 dB and overall physical area of 25 cm^2. The frequency of operation is 10 GHz. (a) What is the aperture efficiency of the antenna (in %)? (b) What is the power PL delivered to a matched load given that the power density of the incident wave at the antenna aperture is 30 mW/cm^2? Assume ideal conditions (no losses).
12.38. A lossless circular aperture antenna has a gain of 15 dB and overall physical area of 25 c...
12.38. A lossless circular aperture antenna has a gain of 15 dB and overall physical area of 25 cm^2. The frequency of operation is 10 GHz. (a) What is the aperture efficiency of the antenna (in %)? (b) What is the power PL delivered to a matched load given that the power density of the incident wave at the antenna aperture is 30 mW/cm^2? Assume ideal conditions (no losses).
A broadcaster transmits its program over a geosynchronous satellite. The uplink and downlink carrier frequencies are...
A broadcaster transmits its program over a geosynchronous satellite. The uplink and downlink carrier frequencies are 14 GHz and 12 GHz, respectively. The distance from the satellite to the gateway and the the receiver can both be approximated as 36,000 km. Assume that the uplink (the Gateway) antenna has a gain of 40 dBi, the receiver on the satellite has an antenna with a gain of 20 dBi and a noise temperature of 3500 K. The video encoder’s rate is...
Q2. Consider a microwave transmit-receive radio-link system. Given that, the transmitter power is Pt-5W at a...
Q2. Consider a microwave transmit-receive radio-link system. Given that, the transmitter power is Pt-5W at a carrier frequency of 6 GHz and the transmitter antenna gain is 40dB. Assume that the receiver antenna has a diameter of 60cm and has an aperture efficiency of 65 %. a) b) c) d) Determine the power density at a distance of 50m from the transmitter antenna. Find the directivity of the receiver antenna. Find the operating wavelength and the far-field distance of the...
Q: (a) The antenna of a 38 cm radius dish used as a satellite receiver in...
Q: (a) The antenna of a 38 cm radius dish used as a satellite receiver in the Ka-band is 25.5 GHz - It operates in the 31.5 GHz frequency band. Find out where the far-field region begins for this antenna. (b) A radar operating in monostatic configuration broadcasts at 10KW power and the receiving power of this radar sensitivity is 12 pW. The gain of the radar antenna at 12 GHz in the maximum radiation direction is 16 dB. This...
2. a. Discuss the practical importance of the antenna beam width b. For an Omni-directional antenna the measurements show the Half Power Beam Width (HPBW) in vertical and horizontal planes are 30...
2. a. Discuss the practical importance of the antenna beam width b. For an Omni-directional antenna the measurements show the Half Power Beam Width (HPBW) in vertical and horizontal planes are 30° and 20° respectively, antenna has loss resistance of 25Ω and efficiency η-0.8,Find: i. Antenna's gain in dB, and ii. Radiation resistance.
2. a. Discuss the practical importance of the antenna beam width b. For an Omni-directional antenna the measurements show the Half Power Beam Width (HPBW) in vertical...
A horn antenna with an area of 4π cm² receives 8 µW/m² intensity from a distance transmitter. What intensity would it receive from reflection off a one-meter-diameter parabolic dish?
A horn antenna with an area of 4π cm² receives 8 µW/m² intensity from a distance transmitter. What intensity would it receive from reflection off a one-meter-diameter parabolic dish?
You have decided to increase the detection range of your iphone14 with a high- gain, directional...
You have decided to increase the detection range of your iphone14 with a high- gain, directional parabolic dish antenna to be able to access more distant cell towers (somewhat more difficult to get into your pocket or purse, however). A 3m-diameter parabolic dish is readily available commercially, and the desired sinusoidal radio signal specification is for Emax = 0.10 μV/m. Assume the antenna absorbs all the radiation that is captured by the dish (100% efficiency): a. What is the amplitude...
You are an antenna engineer and you are asked to design a high directivity/gain antenna for...
You are an antenna engineer and you are asked to design a high directivity/gain antenna for a space-borne communication system operating at 10 GHz. The specifications of the antenna are such that its pattern consists basically of one major lobe and, for simplicity, no minor lobes (if there are any minor lobes they are of such very low intensity and you can assume they are negligible/zero). Also it is desired that the pattern is symmetrical in the azimuthal plane. In...
Q2. Consider a microwave transmit-receive radio-link system. Given that, the transmitter power is Pt-5W at a carrier frequency of 6 GHz and the transmitter antenna gain is 40dB. Assume that the receiver antenna has a diameter of 60cm and has an aperture efficiency of 65 %. a) b) c) d) Determine the power density at a distance of 50m from the transmitter antenna. Find the directivity of the receiver antenna. Find the operating wavelength and the far-field distance of the...
Q: (a) The antenna of a 38 cm radius dish used as a satellite receiver in the Ka-band is 25.5 GHz - It operates in the 31.5 GHz frequency band. Find out where the far-field region begins for this antenna. (b) A radar operating in monostatic configuration broadcasts at 10KW power and the receiving power of this radar sensitivity is 12 pW. The gain of the radar antenna at 12 GHz in the maximum radiation direction is 16 dB. This...
2. a. Discuss the practical importance of the antenna beam width b. For an Omni-directional antenna the measurements show the Half Power Beam Width (HPBW) in vertical and horizontal planes are 30° and 20° respectively, antenna has loss resistance of 25Ω and efficiency η-0.8,Find: i. Antenna's gain in dB, and ii. Radiation resistance.
2. a. Discuss the practical importance of the antenna beam width b. For an Omni-directional antenna the measurements show the Half Power Beam Width (HPBW) in vertical...
You are an antenna engineer and you are asked to design a high directivity/gain antenna for a space-borne communication system operating at 10 GHz. The specifications of the antenna are such that its pattern consists basically of one major lobe and, for simplicity, no minor lobes (if there are any minor lobes they are of such very low intensity and you can assume they are negligible/zero). Also it is desired that the pattern is symmetrical in the azimuthal plane. In...
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