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Antenna Theory Tutorial

This tutorial is meant to provide the readers a detailed description of the antennas used in communication systems. After completing this tutorial, you will be able to calculate the parameters of an antenna and decide […]

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Antenna Theory – Fundamentals

A person, who needs to convey a thought, an idea or a doubt, can do so by voice communication. The following illustration shows two individuals communicating with each other. Here, communication takes place through sound waves. However, […]

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Antenna Theory – Types of Antennas

Antennas have to be classified to understand their physical structure and functionality more clearly. There are many types of antennas depending upon the applications applications. Type of antenna Examples Applications Wire Antennas Dipole antenna, Monopole […]

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Antenna Theory – Poynting Vector

Antennas radiate Electromagnetic energy to transmit or to receive information. Therefore, the terms Energy and Power are associated with these electromagnetic waves and we have to discuss them. An electromagnetic wave has both electric and magnetic fields. Consider the […]

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Antenna Theory – Wire

Wire antennas are the basic types of antennas. These are well known and widely used antennas. To have a better idea of these wire antennas, first let us have a look at the transmission lines. […]

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Antenna Theory – Rhombic

The Rhombic Antenna is an equilateral parallelogram shaped antenna. Generally, it has two opposite acute angles. The tilt angle, θ is approximately equal to 90° minus the angle of major lobe. Rhombic antenna works under the principle […]

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Antenna Theory – V-Antennas

A better version of long-wire antennas is the V-Antenna. This antenna is formed by arranging the long wire in a V-shaped pattern. The end wires are called as legs. This antenna is a bi-directional resonant antenna. […]

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Antenna Theory – Aperture

An Antenna with an aperture at the end can be termed as an Aperture antenna. Waveguide is an example of aperture antenna. The edge of a transmission line when terminated with an opening, radiates energy. This […]

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Antenna Theory – Loop

An RF current carrying coil is given a single turn into a loop, can be used as an antenna called as loop antenna. The currents through this loop antenna will be in phase. The magnetic field […]

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Antenna Theory – Helical

Helical antenna is an example of wire antenna and itself forms the shape of a helix. This is a broadband VHF and UHF antenna. Frequency Range The frequency range of operation of helical antenna is around 30MHz […]

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Antenna Theory – Aperture

An Antenna with an aperture at the end can be termed as an Aperture antenna. Waveguide is an example of aperture antenna. The edge of a transmission line when terminated with an opening, radiates energy. This […]

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Antenna Theory – Micro Strip

Micro strip antennas are low-profile antennas. A metal patch mounted at a ground level with a di-electric material in-between constitutes a Micro strip or Patch Antenna. These are very low size antennas having low radiation. Frequency Range The […]

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Antenna Theory – Slot

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. […]

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Antenna Theory – Horn

To improve the radiation efficiency and directivity of the beam, the wave guide should be provided with an extended aperture to make the abrupt discontinuity of the wave into a gradual transformation. So that all […]

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Antenna Theory – Lens

The antennas, which we have discussed till now, used the plane surface. The lens antennas use the curved surface for both transmission and reception. Lens antennas are made up of glass, where the converging and […]

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Antenna Theory – Parabolic Reflector

Parabolic Reflectors are Microwave antennas. For better understanding of these antennas, the concept of parabolic reflector has to be discussed. Frequency Range The frequency range used for the application of Parabolic reflector antennas is above 1MHz. These […]