Antennas for Drones

[Admin 2545]

This is a 1.2GHz antenna version with pseudo-elliptical polarization

[Admin 2545]

DELTA antenna, another kind of miniature antenna on PCB for 5.8GHz

 

[antenna_kid 13]

cst file  ?

 

[Admin 2545]

DELTA antenna, another kind of miniature antenna on PCB for 5.8GHz

Anyway it's sub-miniature, about 30x30mm

 

And here are the  CSTfile 

thickness FR4 = 1mm

DELTA 5,8GHz.cst

[Admin 2545]

A new form of biquad antenna

 

 

 

 

[Admin 2545]

Antenna circular polarized (clover)

Today I'll show you how to make yourself famous "clover" from IBCrazy.
What is it: a need for stable and long-range FPV video link. If you omit the technical details, it turns out that for the same power in antenna, circular polarization easily interrupts the linear range and stability.
it purple the position of the transmitting antenna in space. In contrast to the linear (normal whip antenna). There is rotate one of the antennas 90 degrees and oppa. Polarization from vertical became horizontal. Ie necessary and the other antenna to rotate as well. If you do not turn, it is a minus signal.
For 2.4 GHz, the sizes to get the antenna oriented in 2440MHz with bandwidth more than sufficient to cover all channels of this group, from 2370 to 2510MHz should be the following:

The length of the Central wire = 3mm

Length of wire = 122,8mm

Long side (the length of the straight segment + length of the Central conductor) = 35,2mm

Short side (the length of the straight segment) = 32,2mm

The arc angle = 90 °

Tilt angle = 50 °

For the range 1.3GHz, with a center frequency of 1280MHz, the dimensions must be as follows:

The length of the Central wire = 3mm

Length of wire = 236,8mm

Long side (the length of the straight segment + length of the Central conductor) = 67,2mm

Short side (the length of the straight segment) = 64,2mm

The arc angle = 90 °

Tilt angle = 50 °

Dimensions for the frequency 5740MHZ, one of the channels points Fat 'shark:

The length of the Central wire = 2mm

Length of wire = 50,9mm

Long side (the length of the straight wire + the length of the Central wire) = 14,8mm

Short side (the length of the straight wire) = 12,8mm

The arc angle = 90 °

Tilt angle = 50 °

This appearance of the antennas at 1.3 GHz (left) and 2.4 GHz (right), in order to give you an idea of sizes:

Constructive Details

 

[Admin 2545]

VAS 5.8 Ghz Air Screw Antenna (RHCP) by Video Aerial Systems

[Admin 2545]

Model Petra antenna for 5,8GHz on FR4 #1mm

Overall dimensions 10x48x66mm

 

[antenna_kid 13]

On 5.10.2017 at 7:38 PM, Admin said:

VAS 5.8 Ghz Air Screw Antenna (RHCP) by Video Aerial Systems

But on this picture there are two different antennas.

First one is some kind of QFH antenna and it's for 1.2ghz. 

[Admin 2545]

,,,I do not think so, this is QFH(Quadrifilar Helix Antenna)

[antenna_kid 13]

Yup, i know QFH. But for me looks like some king evaluation of such antenna made from thin fr4.
Ok i've looked at that antenna. It's not qfh.
So what a kind of antenna is that ?

[Admin 2545]

18 minutes ago, antenna_kid said:

Yup, i know QFH. But for me looks like some king evaluation of such antenna made from thin fr4.
Ok i've looked at that antenna. It's not qfh.
So what a kind of antenna is that ?

Look carefully at the image above,,,....!!!!

[antenna_kid 13]

looked, and ??
I've got that white antenna. And few minutes ago dissembled it
It's not QFH as i said

[antenna_kid 13]

circle is 0.5mm fr4 and folded fr4 is 0.35mm

[Admin 2545]

18 minutes ago, antenna_kid said:

circle is 0.5mm fr4 and folded fr4 is 0.35mm

did not you have anything wrong?

[antenna_kid 13]

i forget - thickness of fr3 sheet
diameter of circular fr4 is 45 
height if folded fr4 is 21.7

 

[antenna_kid 13]

at 1280 - wsvr was 1:1.4

 

[Admin 2545]

I thought this miniature antenna in the sense of its execution by a simple turning operation in a few pieces (4)

The vibrator(1) is made of copper, the rest of the elements(3) are made of duralumin.

 

This patch-yagi antenna has a circular polarization...

 

 

 

These are the dimensions of the antenna...

[Admin 2545]

,,, and here's a wonderful practical achievement of our assiduous collaborator, TommyD ...

 

 

", and related simulations ...

[Admin 2545]

But I think this yagi-biquad should be tried as well...

[Admin 2545]

,,,or so...

[Admin 2545]

I am thinking about making a simple dipole yagi to try some longer range 5.8ghz survey style flying

.., without reflector...

 

 

,,,with reflector...

[bejonet 58]

On 10/5/2017 at 11:24 PM, Admin said:

Antenna circular polarized (clover)

Today I'll show you how to make yourself famous "clover" from IBCrazy.
What is it: a need for stable and long-range FPV video link. If you omit the technical details, it turns out that for the same power in antenna, circular polarization easily interrupts the linear range and stability.
it purple the position of the transmitting antenna in space. In contrast to the linear (normal whip antenna). There is rotate one of the antennas 90 degrees and oppa. Polarization from vertical became horizontal. Ie necessary and the other antenna to rotate as well. If you do not turn, it is a minus signal.
For 2.4 GHz, the sizes to get the antenna oriented in 2440MHz with bandwidth more than sufficient to cover all channels of this group, from 2370 to 2510MHz should be the following:

The length of the Central wire = 3mm

Length of wire = 122,8mm

Long side (the length of the straight segment + length of the Central conductor) = 35,2mm

Short side (the length of the straight segment) = 32,2mm

The arc angle = 90 °

Tilt angle = 50 °

 

it is suitable for 2.4ghz wifi router or just for drone?

[Admin 2545]

It"s suitable for anything...!!!

[Admin 2545]

Aomway Tripple Feed FPV Antenna

Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz.
Good axial ratio, not just directly perpendicular to the patch but also off-center.

Specifications
Center frequency: 5.8 GHz
Bandwidth: 700 MHz (5.3– 6 GHz)
Matching: S11 < -20 dB,
VSWR < 1.5 (at center frequency)
Axial ratio: < 1.3
Antenna gain: 8 dBi
Half power beam width: 55° (horizontal and vertical)
Radiation efficiency: 83.5%
weight :15g
size: 60*60*22mm
Connector: SMA (Blue) / RP-SMA (Red)