Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / syedmsd84
horn antenna is used for the transmission and reception of
microwave signals. It derives its name from the
characteristic flared appearance. The flared portion can be
square, rectangular, or conical. The maximum radiation and
response corresponds with the axis of the horn. In this
respect, the antenna resembles an acoustic horn. It is
usually fed with a waveguide.
In order to function properly, a horn antenna must be a
certain minimum size relative to the wavelength of the
incoming or outgoing electromagnetic field. If the horn is
too small or the wavelength is too large (the frequency is
too low), the antenna will not work efficiently.
Horn antennas are commonly used as the active element in a
dish antenna. The horn is pointed toward the center of the
dish reflector. The use of a horn, rather than a dipole
antenna or any other type of antenna, at the focal point of
the dish minimizes loss of energy (leakage) around the
edges of the dish reflector. It also minimizes the response
of the antenna to unwanted signals not in the favored
direction of the dish.
Horn antennas are used all by themselves in short-range
radar systems, particularly those used by law-enforcement
personnel to measure the speeds of approaching or
retreating vehicles.
| Is This Answer Correct ? | 23 Yes | 0 No |
Post New Answer View All Answers
If R1=R2, then B=0.5, the total time T of square wave in astable multivibrator using op-amp is A T=RC B T=2 RC ln 3 C T=2 RC ln 2 D T=2RC ln (1+ 0.5)
Explain the difference between a multiplexer and encoder? Also what is the between demultiplexer and decoder?
Is reverse saturation current of a diode is independent of reverse bias voltage?
What are fet`s?
how to test on design and style in software?
can i get comming traning school model question paper.
How many 2:1 multiplexers do we need to make a 2 input xor gate?
what is BIAS current/ voltage?
define drain resistance
i am b.sec with PCM now what can i do for higher education
What is Banked Register in Arm 7?
what is E1 ? and how this is work,what is data rate of 1 one E1 and why?
Difference between resistance and resistivity
when you are from engineerng back groung student then y r u choossng bank job? plz give me best answer
Can we get light when the circuit is working?
