ISRO Scientist or Engineer Electronics 2015

Consider a sequence x(n) = [2, 4, 6, 8, 0, 1, 3, 5, 7, 9]. Down-sample the sequence by 3 and then up-sample by 2. The resulting sequence is:

Power consumed in a CMOScircuit operating at frequency fis proportional to:

The phase velocity of a plane wave given by $$E_x = E_o \cos(\omega t - \beta z)$$ with a frequency of 5.0 GHz and a wavelength in the material medium of 3.0 cm is:

If the reflected wave at the load of a transmission line is 20dB below the incident wave, the SWR atthe load is:

The highest frequency for which a circular coaxial transmission line having outer diameter = 3.1 mm and inner diameter = 1.3 mm can be operated in pure TEM mode (assuming free space medium between the two conductors) should be less than:

In a communication system at 300 MHz, the receiving antenna gain is 8 dBi, the transmitting antenna gain is 10 dBi and the transmitting power level is 25 watts, the distance between the transmitter and the receiver is 1 km, the power received at the receiving antenna port (assuming the propagation medium is loss-less):

A rectangular waveguide with air medium has dimensions a = 22.86 mm and b = 10.6 mm is fed by 3 GHz carrier from a coaxial cable, which of the following is false statement for $$TE_{01}$$ mode?

$$TM_{01}$$ mode in rectangular perfect metallic waveguide is:

The directivity of a prime-focal parabolic reflector antenna is 30 dBi.If the efficiency of the antenna is 50%, the gain of the antenna is:

Ratio of skin depths of an Electromagnetic wave inside the conductor for the corresponding frequencies at 4 GHz and 9 GHz, considering the same material properties for both the frequencies is: