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A helical antenna is made up of coil and what?
plane reflector
What is the use of ground plane in helical antenna?
A ground plane in a helical antenna acts as a reflector, enhancing the radiation pattern and efficiency of the antenna. It helps to direct the radiated signal in a desired direction and minimizes signal loss due to ground reflections. The ground plane also provides a stable reference point for the antenna structure.
What are the disadvantages of helical antenna?
Efficiency drops with added turns. Maximum efficiency is about 80% with a 3-4 turn helical and drops to about 60% at 12 turns.
What are helical piers used for?
Helical piers are used to provide a foundation support for various types of structures. Helical piers are mostly used when there is a soil problem prohibiting a structure from failing.
What is the advantage of a helical wire satellite antenna?
Circular polarization characteristics of a helical antenna help offset the effects of spin modulation from satellites in motion, that is, the tendency for satellites to spin causing the position of their antennae to change rapidly in accordance with the spin, causing a fluctuation in the signal as received by a fixed signal on earth. Circular polarization of the earth fixed antenna reduces the fluctuating effects of the satellite's spin on the recived signal.
What are the features of helical antenna?
the features are :-1.It has a wide bandwidth2.Easily constructed3.Has real i/p impedence.4.Can produce circularly polarized field.
How does a smart antenna work?
A smart antenna is used to identify signal signature and to track an antenna beam on the target. Some are for beamforming which is used to create the radiation pattern of the antenna.
What is frank dance s helical model of communication?
what is the use of dance helical communication? helical communicqationis the communication of helical
What two types antenna used for terrestrial microwave communication?
Virtually all terrestrial microwave communication is point-to-point, using parabolic reflector antennas. A small percentage uses yagi, helical, corner reflector, or flat-plate reflector antennas. Essentially no "omnidirectional" antennas are used in microwave.
What is the history of helical antenna?
Helical antennas were first proposed by the American engineer John D. Kraus in the early 1950s. They gained popularity due to their compact size and wide bandwidth, making them suitable for various applications, including satellite communication and space exploration. The design features a helical element that radiates electromagnetic waves in a circularly polarized fashion, which was particularly advantageous for receiving signals from satellites in motion. Over the years, helical antennas have undergone various improvements, but their fundamental design principles have remained largely unchanged.
What is Helical Sequence?
helical sequence
What are helical springs?
Helical springs are the typical, common, wound springs used in tension or compression. The term 'helical' comes from the spring being a helix- the wire is wound around a mandrel, advancing along the length of the mandrel as it is wound.
