Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Admin

Antennas for Drones

123 posts in this topic

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

Untitled_0_02.gif

Untitled_0_02.jpg

Share this post


Link to post
Share on other sites

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

 

19.jpg

Share this post


Link to post
Share on other sites

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

Anyway it's sub-miniature, about 30x30mm

20.jpg

 

And here are the  CSTfile 

thickness FR4 = 1mm

DELTA 5,8GHz.cst

Share this post


Link to post
Share on other sites

A new form of biquad antenna

 

 

biquad new_01.jpg

 

33.jpg

 

biquad new_01.jpg

biquad new_02.jpg

biquad new_03.jpg

biquad new_04.jpg

biquad new_05.jpg

1 person likes this

Share this post


Link to post
Share on other sites

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 °

clever-0.jpg


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

clever-1.jpg

Constructive Details

 

clever-2.jpg

clever-3.jpg

clever-4.jpg

clever-5.jpg

clever-6.jpg

clever-7.jpg

clever-8.jpg

clever-9.jpg

clever-10.jpg

clever-11.jpg

clever-12.jpg

clever-13.jpg

clever-14.jpg

clever-15.jpg

clever-16.jpg

clever-17.jpg

clever-18.jpg

clever-19.jpg

clever-20.jpg

clever-21.jpg

clever-22.jpg

clever-23.jpg

Share this post


Link to post
Share on other sites

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

potrashkaJ_9397973_25411053.jpg

sravnenieJ_8191184_25411039.jpg

Share this post


Link to post
Share on other sites

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

Overall dimensions 10x48x66mm

52.jpg

 

pcb sgser_01.jpg

Share this post


Link to post
Share on other sites
On 5.10.2017 at 7:38 PM, Admin said:

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

potrashkaJ_9397973_25411053.jpg

sravnenieJ_8191184_25411039.jpg

But on this picture there are two different antennas.

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

Share this post


Link to post
Share on other sites

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

ed.jpg

Share this post


Link to post
Share on other sites

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 ?

Share this post


Link to post
Share on other sites
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,,,....!!!!

Share this post


Link to post
Share on other sites

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

1 person likes this

Share this post


Link to post
Share on other sites
18 minutes ago, antenna_kid said:

circle is 0.5mm fr4 and folded fr4 is 0.35mm

did not you have anything wrong?

Share this post


Link to post
Share on other sites

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

 

Share this post


Link to post
Share on other sites

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.

best5,8_02-tile.jpg

best5,8_08.jpg

 

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

 

 

best5,8_01.gif

 

These are the dimensions of the antenna...

04.jpg

05.jpg

3 people like this

Share this post


Link to post
Share on other sites

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

13a.jpg

13b.jpg

 

 

", and related simulations ...

tommyd invers_01.gif

tommyd invers_01-tile.jpg

tommyd invers_07.jpg

1 person likes this

Share this post


Link to post
Share on other sites

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

af.jpg

Share this post


Link to post
Share on other sites

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

.., without reflector...

01-tile.jpg

 

 

,,,with reflector...

02-tile.jpg

03.jpg

Share this post


Link to post
Share on other sites
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?

Share this post


Link to post
Share on other sites

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)

 

horz.jpg

 

horz.jpg

1 person likes this

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now