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Admin

Biquad Antenna

278 posts in this topic

,,, that would be ... !!!!

screenshot_50.png

 

screenshot_51.png

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On 5/4/2022 at 0:07 AM, Admin said:

,,, that would be ... !!!!

 

Thanks, my friend
I want this antenna for fpv
I will definitely make your design and test it on the UAV
I bought the antenna you see in the picture
I haven't tested it myself yet, but apparently it works great
My friends tested and reached a range of 30 km with a power of 1 watt
I do not need this amount
Coverage is more important to me
For example, with two diversion receivers and 90 degree coverage and 10 dbi gain for 10 km distance
I have a few questions to make this antenna
1. If I use fr4 with a thickness greater than 0.8, like 1.6 and add to the height will the antenna have the same performance? Or do I want to use a steel plate instead of its FR4?
2- Is the thickness of copper 0.25? Is there a problem for me to use 0.35? (Finding a 0.25 board is really hard)
3- Is it possible to design based on multiples of lambda? Because the network may be busy, I have to switch to Frequency 5280
Thank you in the end

8c738d4a-4a25-4d28-a020-1cf9c5f161aa.jpg

bdf288a7-fa22-4c9b-ac26-6b8b5052558e.jpg

pcb antenna 5.2ghz.IGS

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1) No.

2) Other dimensions are required for 0.35mm copper sheet.

3)The antenna simulated by me , works just as well for the 5.0-5.5 GHz frequency range.

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2 minutes ago, Admin said:

1) No.

2) Other dimensions are required for 0.35mm copper sheet.

3)The antenna simulated by me , works just as well for the 5.0-5.5 GHz frequency range.

thanks

In our area, only PCBs with a thickness of 1.6 and a thickness of 0.35 can be found
Is it possible to design for this type of material?

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,,, I will do a simulation for PCB 1.6mm thick as well as for antenna only 0.35mm thick sheet...!!!!

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1 minute ago, Admin said:

,,, I will do a simulation for PCB 1.6mm thick as well as for antenna only 0.35mm thick sheet...!!!!

oh realy thanks 

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,,, this is what the 0.35mm thick sheet looks like...

screenshot_52.png

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Posted (edited)

18 hours ago, Admin said:

,,, this is what the 0.35mm thick sheet looks like...

screenshot_52.png

thanks admin

Please give me the sizes of this design as well

Or is it the same size as before?

Edited by mojtaba.hdpr

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On 5/5/2022 at 4:24 PM, Admin said:

,,, this is what the 0.35mm thick sheet looks like...

screenshot_52.png

Hi admin

do you here ?

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,,,hi buddy...!!!

screenshot_53.png

 

,,, but I think it's better that way ... !!!!

 

screenshot_61.png

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Posted (edited)

Hi admin

what are these ? is copper ?

just support or ...

screenshot_61.thumb.png.7d7f42b83c9b33dee015140ffdf88c86.png

Edited by mojtaba.hdpr

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,, is one and the same with antenna ,,, copper sheet or galvanized sheet...!!!

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biquad 4500(Russian 5G)-6000

t=0.2mm

h=12.5

reflector = 56x56 mm

connector - SMA

bq4500-6000.jpg

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7 hours ago, mojtaba.hdpr said:

thanks 

Can this design be used for biquad?

sorry for double biquad i mean 

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Biquat + Horn for 2.4 - 2.5 GHz & optimized for gain

 

gain.png s11.png

vswr.png

Size

Spoiler

size.png size2.png

Impedance + Gain

Spoiler

impedance.png gain plot.png

 

Parameters:

Spoiler

wsq="5.8" "with square"
lsq="24.1" "length square"
h="23.1" "height"
g="0.5" "thickness material"
w="(l-wsq)/2" "with biquad"
ded="l/4-we1/2" "distance edge"
ded2="l/4+we1/2" "distance edge 2"
l="158.3" "length biquad"
e="4.3" "edge 3 biquad"
s="4.8" "hole diameter"
s1="49.0" "length slot"
sl="0.5" "slot"
x="248.2" "reflector x"
y="128.7" "reflector y"
we1="4.0" "with edge 1"
hc="177.0" "height collector"
ang="13.9" "angle collector"

File:

Biquad 2-4ghz-double-reflector.cst

Edited by Dr. Pepper
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,,, congratulations doctor, but I think you need to work a little on the impedance, it should cover a wider band of frequencies...!!!

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You are right, its not perfect. But the first goal was reach 16 dBi. I will try to tune the design for a more stable range. 

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12 hours ago, Dr. Pepper said:

Biquat + Horn for 2.4 - 2.5 GHz & optimized for gain

 

gain.png 

 

  Reveal hidden contents

size.png size2.png

 

  Reveal hidden contents

impedance.png gain plot.png

 

  Reveal hidden contents

wsq="5.8" "with square"
lsq="24.1" "length square"
h="23.1" "height"
g="0.5" "thickness material"
w="(l-wsq)/2" "with biquad"
ded="l/4-we1/2" "distance edge"
ded2="l/4+we1/2" "distance edge 2"
l="158.3" "length biquad"
e="4.3" "edge 3 biquad"
s="4.8" "hole diameter"
s1="49.0" "length slot"
sl="0.5" "slot"
x="248.2" "reflector x"
y="128.7" "reflector y"
we1="4.0" "with edge 1"
hc="177.0" "height collector"
ang="13.9" "angle collector"

 

This antenna can be used in a wider range without visible loss.

It can be done much easier. please display the SWR graph from 1. It cannot be less than 1 (apparently CST does not know this), this complicates the reading of the graph.

To increase the gain, you can use the director system. Read the topic

 

image_30890.png

image_30889.png

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