## How long should a 2m antenna be?

The higher the frequency, the shorter the wavelength. Most commercially available antennas come in length equivalent from 1/4 to 5/8’s of a full wavelength. This means that if you want to run a 2m rig (144’ish Mhz),a half wavelength antenna would be 3.3” long, and 3.3 ft is very manageable for vehiclular operations.

**How do you make a 2 meter ground plane antenna?**

So to build our two meter ground plane antenna we’re going to build it around an Esso to 39 chassis connector you can buy these at RadioShack.

**How does a dual band antenna work?**

A dual-band antenna is an antenna that can send and receive radio frequency signals at two distinct frequencies. Depending on their configuration, these antennas are capable of using either of the two frequencies individually or at the same time.

### How far apart should ham antennas be?

Antenna Positioning: Distance Between Antenna

For effective diversity performance, AB antennas should not be positioned less than ¼ wavelength apart, and ideally, they would be placed ½ to one full wavelength apart.

**How long is a half wave 2 meter antenna?**

about 3 feet

For example, a 200 MHz wave has a wavelength of approximately 6 feet (2 m). Therefore, a 1/2-wave receiver antenna would be about 3 feet (1 m) long, and a 1/4-wave antenna would be about 18 inches (45 cm). Note that antenna length typically needs to only be approximate, not exact.

**How long is a 2 meter dipole antenna?**

approximately 8:1 on 146.000 MHz (center band). I measured the elements and each was 17 inches long.

## What length is 5/8 wave 2 meter antenna?

48.2″

2 METER 5/8 WAVE ANTENNA

This 5/8 wave (physical & electrical) antenna has a nominal impedance of 50-52 ohms and can achieve average tuned SWR of 1.5 to 1 over 4 MHz. The over all length is 48.2″ (122.4cm).

**Does a 1/4 wave antenna need a ground plane?**

Does a 1/4 wave antenna need a ground plane? Answer: Yes. All 1/4 wave antennas work best if they are installed in the center of a metal ground plane with at least 1/4 wave length radius (1/2 wave length diameter: ~6 inches for 900Mhz and ~3 inches for 2.4Ghz); larger is better.

**What is dual antenna?**

A dual Wi-Fi antenna is a pair of identical antennas on a wireless router or Wi-Fi-equipped device, intended to eliminate signal fading and dead spots.

### What is a dual element antenna?

The proposed dual-element antenna is comprised a loop-type element and monopole-type element, where one element is directly fed and the other resonates parasitically.

**How close can I mount two antennas?**

Distance between antennas

The distance between the two diversity antennas should be at least one quarter of a wavelength, and the distance between them will affect the signal.

**What should be the distance between two antennas?**

We recommend at least one wavelength distance between directional antennas mounted in a horizontal configuration. Three or more is preferable when possible.

## How is HF antenna length calculated?

The Half-Wave Dipole Antenna

The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet.

**What is the formula for a dipole antenna?**

Dipole length formula

Often a formula for the length of a dipole in feet is seen as 468 / frequency. This can be derived by taking the figure of 492 seen in the formula above and multiplying it by the typical A or end effect factor of 0.95.

**How do you calculate dipole length?**

When determining how long to make each leg of a Dipole antenna, dividing the frequency in MHz into 468 will give the overall length. To find the half wave, divide that number by two. This will give you the length of each leg of the antenna.

### Do 5/8 wave antennas need a ground plane?

Five eighths wavelength antenna concept

The quarter wavelength vertical antenna works well when it is loaded against a ground or ground plane. The five eighths wavelength antenna is often used in mobile situations where it uses the metal of a vehicle as its ground plane.

**What is the difference between 1/4 wave and 5/8 wave antenna?**

5/8th wave gain is now 1.95 dB over a 1/4 wave antenna at 2 degrees, but the peak gain is only . 15dB better! The smaller the roof and/or the less centered the antenna, the less gain advantage for a 5/8th wave. This occurs because 5/8th wave antennas develop gain from ground reflections.

**How much gain does a 1/4 wave antenna have?**

Should I use a 1/4 wave or 1/2 wave antenna?

Antenna Type | ½-wave | ¼-wave |
---|---|---|

Alternate name | Dipole | Monopole |

# of elements | 2 | 1 |

Requires ground plane? | No | Yes |

Gain (dBi) | 2.1 | 1.9 |

## Is a half-wave antenna better than a quarter wave?

A half-wave antenna is a good choice when your entire device is much smaller than a quarter-wavelength, or when you are building an antenna that is physically separated from the transmitter.

**What is difference between single antenna and double antenna router?**

A router with a single antenna can only receive one frequency. And it will likely be a 2.4 GHz network. In contrast, the dual-antenna router is capable of receiving both the 2.4 GHz and 5 GHz bands. Single-band routers have a restricted bandwidth.

**What is dual-band microstrip antenna?**

A dual-band design of a finite ground coplanar waveguide (CPW) fed antenna is presented for simultaneously wireless local area network (WLAN) and worldwide interoperability for Microwave Access (WiMAX) applications. The proposed antenna, comprising a rectangular planar patch element embedded with two L shaped slots.

### How does a whip antenna work?

The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna’s axis), with the radiated power falling off with elevation angle to zero on the antenna’s axis.

**Are blade antennas omnidirectional?**

This antenna with modern design is suitable for 4G LTE routers, terminals, and other telematic applications. The antenna is omnidirectional with high efficiency and covers worldwide networks. Two variations of mounting swivels allow different orientation of antennas on devices with MIMO systems.

**Can you put 2 antennas next to each other?**

The distance between the two diversity antennas should be at least one quarter of a wavelength, and the distance between them will affect the signal. Antennas that operate on different frequencies should be placed so that they will not interfere with each other.

## Can I put 2 antennas be connected together?

Combining two TV antennas for better HDTV reception – YouTube