What is a helical antenna or propeller antenna is one whose construction is formed by a helix-wrapped conductor of its second name.
It has a solenoid shape and its origin comes from the vertical monopole antenna.
A solenoid is a physical device that is capable of creating a uniform magnetic field.
One of the typical basic solenoids is a coil or a transformer that is applied to an antenna.
Contenido
Characteristics
1 ⇒ Broadband
- The helical antenna has a large bandwidth.
- A propeller is the result of winding a thread on a cylinder object.
2 ⇒ Helix Geometry
- Coil Diameter.
- Separation between two consecutive turns.
- Turn number the propeller has.
- Thread Diameter.
- Winding direction (Right or Left).
3 ⇒ Circular type polarization.
- The direction of rotation is defined by the driver (Right or Left).
Operating mode
1 ⇒ Depending on the size of the propeller
- There are two basic helical antenna modes.
- Normal mode: it is the antenna built on a ground plane.
- Axial Mode: it has great directivity and high bandwidth.
Classification
1 ⇒ Antena para radio
- For portable radio.
2 ⇒ Satellite reception antenna.
- These have application in reception of satellite signal and operate in frequencies that comprise 1575.42 MHz.
- Antenna is circular polarization.
The turns are separated a little less than the propeller.
3 ⇒ HALO antenna.
- It is a helical antenna.
- This is basically used in the VHF reception.
- They are omnidirectional antennas.
- They offer good profits.
Properties of the helical antenna
1 ⇒ Polarization.
- The polarization of the helix antenna is circular (vertical or horizontal in equal parts).
2 ⇒ Impedance.
- These antenna offer low impedance and must be adapted to transmitters with impedance adapters.
3 ⇒ Resonance.
- It is a resonant antenna at the basic or fundamental frequencies.
Helical antenna dimensions
1 ⇒ Helical dimensions are given by acronyms.
- D = helical diameter “Center to center of conductor”.
- C = circumference perimeter “ΠD”.
- S = Space between turns “center to center of the driver”.
- ∝ = It is the elevation angle “tan-1 / ΠD”.
- L = Length of one turn.
- n = Number of turns.
- A = Axial length “nS”.
- d = helical conductor diameter.
- G = The diameter of the ground plane.
TV Antenna List
First of all, if you don’t have a TV antenna in your home, we leave you an antenna list so you can tune into the TV channels of your country or region.
1- How to make a homemade tv antenna.
2- Super, Sencilla y Económica ✅ Antena para TV▶️ Coaxial & Splitter.
3- Antena log periodic – Diseño para la construccion- antena para tv.
4- Como hacer una antena de tv casera de largo alcance.
5- Como hacer una antena casera para tv Clip & Splitter.
In the JM Actualidades channel we have antenna manufacturing videos for every need, so visit the YouTube channel.
Related questions:
- A- What is a helical antenna?.
- B- helical antenna features?.
- C- How to program wifi to lg tv for antenna?.
- D- buy helical antenna?.
- E- how to calculate the gain of a helical antenna?.
- F- vhf helical antenna?.
You need more information, you can find it in the following article on Antenna.
