## What is the impedance of a folded dipole?

With a folded dipole, impedance varies between ~200 ohms to about 300 ohms. This also means SWR can be as high as ~1.5:1 over normal height ranges! -The folded dipole has the advantage of using balanced line feed, and balanced line has low-loss at high SWR.

**How does a folded dipole work?**

A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center. The length of the dipole is half of the wavelength. Hence, it is called as half wave folded dipole antenna.

**How impedance can be increased by folded dipole?**

as a simple half-wave dipole. The impedance increase can be deduced from the fact that the power supplied to a folded dipole antenna is evenly shared between the two sections which make up the antenna. This means that when compared to a standard dipole the current in each conductor is reduced to a half.

### How big is a 70cm dipole in tubing?

Typical tubing diameters for the 2m and 70cm bands are from 0.25in or 6mm, up to 3/8-in or 8-9mm. CONTENTS Top 1. Introduction 2. Making a Bending Jig 3. Softening the Tubing 4. Bending the Elements 5. Fixing the Folded Dipole to the Boom 6. Supporting the Folded Dipole 7. Waterproofing End, Back Making a Bending Jig

**When do you use a folded dipole antenna?**

Because the characteristic impedance of twin-lead transmission lines are roughly 300 Ohms, the folded dipole is often used when connecting to this type of line, for optimal power transfer. Hence, the half-wavelength folded dipole antenna is often used when larger antenna impedances (>100 Ohms) are needed.

**How to calculate the length of a folded dipole?**

The starting formula for the folded dipole calculation is the same as a dipole, 468 / Frequency (in MHz). Let’s try an example: Design a folded dipole for the 40 meter band. The frequency that is chosen might be 7.15 MHz. Plugging this in to the formula (468 / 7.15) gives a folded dipole with a length of 65.45 feet.

#### Can a folded dipole calculator be combined with Yagi Uda antenna?

Folded Dipole Calculator To be combined with a Yagi Uda Antenna or used as is. The impedance of this antenna is around 300 Ω, so you may want to use a transformer or a λ/4 long piece of 120 Ω coaxial cable to match this impedance to 50 Ω. Geometriy is not that critical.