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A radio link has 15 W transmitter connected to an antenna of 2.5 m2 effective aperture at 5 GHz. The receiving antenna has an effective aperture of 0.5 m2 and is located at a 15 Km line of sight distance from transmitting antenna. Assuming lossless, matched antennas, the power delivered to the receiver is:
A rectangular horn antenna has an aperture area of 3λ × 2λ. If the aperture efficiency of an antenna is 90%, then the directivity of the antenna is:
Effective aperture is a parameter of the antenna that gives the physical aperture of the antenna.
If the aperture antenna is tapered only in H-plane then which of the following is true compared to uniform non-tapered aperture antenna?
If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m2 and the intrinsic impedance of the medium is 377 Ω, then the power received by the antenna is:
What is the physical area of the rectangular horn antenna with E-plane aperture 5 λ and H-plane aperture 4 λ?
If the directivity of a square corner receiving antenna is 20 and operating at a wavelength of 0.25m, the effective aperture of a square corner antenna is:
An antenna in free space receives 4 μW of power when the incident electric field is 10 mV/m rms. The effective aperture of the antenna is:
Pavan and Sravan are two persons. If Pavan works with his actual efficiency and Sravan twice of his actual efficiency then it takes 25 days to complete the work. But If Pavan works twice of his actual efficiency and Sravan with his normal efficiency then the work is completed in 20 days. How many days would it take if Sravan alone works with his actual efficiency (in Days)?
একটি তারের দৈর্ঘ্য 5m , প্রস্থচ্ছেদের ক্ষেত্রফল 0.002m2  , অসহপীড়ন   2.5 ×105 Nm-2। তারটির অসহভর কত?