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The principle of the lens antenna is THE EQUALITY OF THE PATH LENGTH.
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∙ 12y ago
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Why are gain produced in antenna?
A simplified explanation is that the antenna does for radio waves what a lens does for light because of physics.
The power of the signal would be high or low if you are transmitting in omnidirection antenna as compared to directional antenna?
The power of the signal, as perceived by the receiver, will be lower with an omnidirectional antenna. This is because the omnidirectional antenna is transmitting in all directions, while the directional antenna is transmitting in only one direction.Think of the directional antenna as a lens, focusing proportionally more power in a smaller space.
How do you test a microstrip antenna?
A micro-strip antenna works on the principle of resonant cavity (short circuit walls on top and bottom, open circuit walls on the sides).A resonant cavity stores energy unlike transmission lines or wave guide which transmits electromagnetic energy from one part to another. A R.C is equivalent to LC device at low frequencies.
What is the working principle of rectenna?
rectenna is nothing but RECTifying anTENNA and this converts radio waves to electricity.the radio waves may be anything such as microwaves etc., by what does this rectenna works? this is only through the mesh of diodes and dipoles
What is a reconfigurable antenna?
an antenna that is able to be formed, or bent
Why are gain produced in antenna?
A simplified explanation is that the antenna does for radio waves what a lens does for light because of physics.
What do you understand by field equivalence principle?
The eqivalence principle is a principle that replaces the actual source i.e (antenna , transmitter) by eqivalent sources
How is lens and mirror alike?
Both use the principle of optics.
What is an upright image?
The image produced by the lens is above the principle axis.
The power of the signal would be high or low if you are transmitting in omnidirection antenna as compared to directional antenna?
The power of the signal, as perceived by the receiver, will be lower with an omnidirectional antenna. This is because the omnidirectional antenna is transmitting in all directions, while the directional antenna is transmitting in only one direction.Think of the directional antenna as a lens, focusing proportionally more power in a smaller space.
Rays of light incident on lens and parallel to the principal axis of the lens converge?
This depends on the type of lens. If it is a convex lens then they converge at the focus on the other side of the lens. If it is a concave lens, then they diverge and appear to be coming from the focus present on the same side of the lens as the incident ray.
EQ-20 why is the height of a VHF radio antenna important?
VHF radios work by the line of sight principle
What is a micro bug?
The micro-bug is a Cybertronian device used for covert spying. It consists of a small camera lens and an internal antenna capable of streaming
Working principle of microscope?
microscope consists of two lens called eye lens and objective lens. objective lens is lens kept behind object and eye lens is keep on the top of microscope .i.e. on the place through which we look. firstly the object is placed behind the objective of microscope which is turned into virtual, erect and magnified image. later this image is thought to be the object for the eye lens and this objects forms real, inverted and magnified image.
Why is height of the VHF radio antenna important?
VHF radios work by the line of sight principle
The nature of the final image formed by a compound microscope?
The principle of image formation in a compound microscope states that the second lens magnifies the image formed by the first lens. The use of two lenses enhances the magnification of the image.
2 differences between a mirror and a lens?
A mirror is a device that is based on the principle of reflection whereas lenses are devices that are based on the principle of refraction. They are both used in fields such as optics, astronomy, photography and various other fields.
