mini-Questionnaire

Q. what is a broadside array?
Ans. a no. of parallel identical elements are set-up along a line drawn perpendicular to their axis. each individual element is equally spaced along that line and each element is fed with current of equal magnitude and of equal phase.

Q. what are the factors that regulates the shape of a beam?
Ans. 1. spacing between the array elements (d)
         2. magnitude of current in the array element ()
         3. phase of current in the array element
         4. length of the array element

Q. if you have to rename Yagi-Uda antt, what would you name it?
Ans. a customized broadside array antt.

Q. why microwaves are called so?
Ans. the prefix micro- in microwave is not meant to suggest a wavelength in the micrometer range. It indicates that microwaves are "small", compared to waves used in typical radio broadcasting, in that they have shorter wavelengths.

they ranges from
1,000 µm to 1,000,000 µm, or
0.1 cm to 100 cm, or
300 MHz to 300 GHz, or
1 m to 1 mm, or
1.24 µeV to 1.24 meV

Q. What is the range of RF Engineering?
Ans. the microwave spectrum, ranging from 1 GHz to 100 GHz (300 cm to 3 mm). most commonly, 1 GHz to 40 GHz

Wavelength: 1 mm to 100,000 km
Frequency: 3Hz to 300 GHz
Photon Energy: 12.4 feV to 1.24 meV

Radio Spectrum: 10kHz to above 10GHz. (Reference EECS, UCB)

Q. how much damage does the microwave exposure causes to human?
Ans.  a two-second burst of the 95 GHz focused beam heats the skin to a temperature of 54°C (129 °F) at a depth of 0.4 millimetres.