Slots in patch antenna

Slot Antenna is an example of Aperture antenna. A rectangular slot is made on the conducting sheet. These slot antennas can be formed by simply making a cut on the surface, where they are mounted on. The use of slot antennas is well understood through its working principle. Let us have a look at the. The main objective of this paper is to simulate and design a single u-shaped microstrip patch antenna with operating frequency of GHz. This type of antenna has to be d. The slot antenna is studied. The basic principles of slot antennas are presented, along with design parameters.

A Review on Circular Microstrip Patch

Nevertheless in the Antenna Design literature, dual-band microstrip patch antennas are categorized into two types depending upon the number of radiating elements, explicitly, multi-resonator antennas and reactive loading antennas. Let us have a look at the structure of a slot antenna. If this dipole is replaced by a slot antenna, in this case don't appear these disadvantages. As the iteration increases the bandwidth is increases as well as it generates another resonant frequency at 7. The dual of a slot antenna would be if the conductive material and air were interchanged - that is, the slot antenna became a metal slab in space.

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The Slot Antenna Video

Slot Antenna is an example of Aperture antenna. A rectangular slot is made on the conducting sheet. These slot antennas can be formed by simply making a cut on the surface, where they are mounted on. The use of slot antennas is well understood through its working principle. Let us have a look at the structure of a slot antenna. When an infinite conducting sheet is made a rectangular cut and the fields are excited in the aperture which is called as a slot , it is termed as Slot antenna.

This can be understood by observing the image of a slot antenna. The following image shows the model of a Slot antenna. This concept gives an introduction to the slot antennas.

The above images clearly explain the principle. The light does not pass through the opaque area, but passes through the aperture. The light does not pass through the plane but through the remaining portion. The screen is not placed to observe the resultant combination. The effect of screen gets nullified. This principle of optics is applied to electromagnetic waves for the wave to get radiated. It is true that when a HF field exists across a narrow slot in a conducting plane, the energy is radiated.

Consider an infinite plane conducting screen is taken and pierced with apertures of desired shape and size and this will be the screen of slot antenna. Another screen is considered interchanging the places of aperture and screen area which is the complementary screen.

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The microstrip antennas have special characteristics such as low profile, small size, low weight, low cost, printed directly on circuit board and easy to analysis and fabricate. Due to these characteristics, it has been widely used for specific applications in satellite communications, mobile communication for GSM, mobile radio and remote sensing [1].

The microstrip antennas are also known as patch antennas or printed antennas. The microstrip antennas are mostly a broadside radiator. The patch is designed in such a way so that its pattern is maximum normal to it. End-fire radiator can also be chosen by proper mode selection. The position of the feed has to be changed as before to control the input impedance.

The patch, microstrip transmission line or input, output pin of coaxial probe , and ground plane are made of high conductive material typically copper. The patch may be in a variety of shapes, but rectangular and circular are the most common because ease of analysis and fabrication, attractive radiation characteristics, especially low cross polarization.

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Therefore, in their conventional form, microstrip antennas fail to find many applications in modern satellite mounted antennas operating in C band of frequency spectrum must be conformal and compact in size, capable of operating at two or more frequency at a time and must present broadband performance.

Considering these requirements conventional printed circuit antennas fail to serve their purpose in satellite communication systems. Extensive work in recent past has been reported through modification in conventional microstrip antennas geometrics by introducing slot in the patch.


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