What are the advantages of helical antenna?
Benefits or advantages of Helical Antenna ➨It can be used for broadband applications due to wider bandwidth. ➨It can be used at HF/VHF frequencies for transmission and reception. ➨It offers higher directivity. ➨It is very robust in construction.
What is the application of a helical antenna?
Helical antennas are used in many satellites like data relay and weather. This antenna is used for transmitting & receiving VHF waves, especially for ionospheric propagation. It is used for different communications like radio astronomy, space telemetry, satellite, and space.
How does a helix antenna work?
Helical antenna or helix antenna is the antenna in which the conducting wire is wound in helical shape and connected to the ground plate with a feeder line. It is the simplest antenna, which provides circularly polarized waves. It is used in extra-terrestrial communications in which satellite relays etc., are involved.
Is helical antenna a wideband antenna?
The strip helical antenna is designed for wideband applications that provide a wide bandwidth and circular polarization. The helical antenna is planned on at 10 GHz frequency by using Paper material.
What is meant by helical antenna?
A helical antenna is a specialized antenna that is considered as a hybrid of the radiating elements — loop antennas and the dipole. In a helical antenna, the conducting wire is wound in the form of a helix.
What are the features of helical antenna?
Salient features of helical antenna
- Helical antenna is a simple antenna for circular polarisation.
- It is used in VHF and UHF bands.
- It is most popularly used in axial mode.
- In normal mode, beam width and efficiency are small.
- It is a wide band antenna in axial mode.
What are the modes of helical antenna?
In the normal mode of radiation, the radiation field is normal to the helix axis and the radiated waves are circularly polarized waves. This mode of radiation is obtained if the dimensions of a helix are small compared to the wavelength.
What are the two modes of operation in a helical antenna?
Helical antennas can operate in one of two principal modes: normal or axial. In the normal mode or broadside helical antenna, the diameter and the pitch of the aerial are small compared with the wavelength.
What are the parameters to be considered for the design of a helical antenna?
The antenna geometry is described with the following parameters: circumference of helix C = πD , spacing p between the successive turns, diameter of helix D = 2a , pitch angle ψ = tan-1( p / πD ), number of turns N , total length of the antenna L = Np , total length of the wire L n = NL 0 where L 0 is the wire length …