VAS - 2.4 GHz Pepperbox 13dBic Antenna RHCP

[mojtaba.hdpr 1]

yes i know that papperbox antenna composed two crosshair antenna

[Admin 2545]

,,, and that's, how you say ... ???

[mojtaba.hdpr 1]

1 minute ago, Admin said:

,,, and that's, how you say ... ???

i want know distance between two crosshair antenna or any data that is new in papperbox antenna after merge two crosshair antenna 

[Admin 2545]

,,,0,62*lambda-----0,99*lambda

[mojtaba.hdpr 1]

position

1 minute ago, Admin said:

,,,0,62*lambda-----0,99*lambda

thanks

have you any datasheet about this or CTS ?

another question : which antenna  is better than for beamwith in same gain (13db)

1- dual-biquad 

2- papperbox 

[Admin 2545]

[mojtaba.hdpr 1]

33 minutes ago, Admin said:

now can you please simulate papperbox (not crosshair) antenna in CTS 

[Admin 2545]

,, only if you give me the dielectric characteristics of the pepper-box material...!!

[mojtaba.hdpr 1]

1 minute ago, Admin said:

,, only if you give me the dielectric characteristics of the pepper-box material...!!

please use dielectric characteristics of crosshair that you simulate 

[Admin 2545]

,,, the air is not dielectric .... !!!

[mojtaba.hdpr 1]

53 minutes ago, Admin said:

,,, the air is not dielectric .... !!!

yes 

I think simulate pepperbox is not hard for you...!!

Edited August 30, 2019 by Admin

[Admin 2545]

,,,like this...???

[Admin 2545]

,,,, mojtaba, are you dealing with drones ... ???

[mojtaba.hdpr 1]

3 hours ago, Admin said:

,,,, mojtaba, are you dealing with drones ... ???

no just hubby 

 

 

[mojtaba.hdpr 1]

3 hours ago, Admin said:

,,,like this...???

blue wall is dielectric and just for cover in paperbox and not important in design 

please see link and design like pic 

http://fpv.no/vbulletin/showthread.php/10891-DIY-Pepperbox-antenne

[Admin 2545]

,,, ready, that this is the end of this topic ... !!!
,,,tomorrow I will give the dimensions...!!!

 

,,, below are simulated 1 + 1 pepperbox antenna  at a distance of 123mm...

,,, twine crosshair antenna...!!!

[mojtaba.hdpr 1]

6 minutes ago, Admin said:

,,, ready, that this is the end of this topic ... !!!
,,,tomorrow I will give the dimensions...!!!

ok

if you like in end simulate twine crosshair antenna and report dimension for 13db antenna 

[Admin 2545]

,,, the promised ...

[Sham 0]

On 28/01/2019 at 6:09 PM, Admin said:

,,,and some construction details...

Hi.

Is it the matching netrowk of the pepperbox antenna? According to Alex Ibcrazy we need to rotate one of the antenna 180° and delay one cable 180° to make it work.I have no idea and no experience of RF.Can somebody help me?.I want to build 1280mhz Pepperbox Antenna.

[Admin 2545]

Sham, it would be nice if you read this...https://fpvlab.com/forums/showthread.php?3626-Crosshair-10-dbic-Circularly-polarized-antenna-tutorial!

,,, normally,it comes to 180 grd...!!!

,,,, and these would be the dimensions for some working frequencies...

 

,,, if you want an antenna on the frequency of 1280MHx,maybe I can help you

[Sham 0]

11 hours ago, Admin said:

Sham, it would be nice if you read this...https://fpvlab.com/forums/showthread.php?3626-Crosshair-10-dbic-Circularly-polarized-antenna-tutorial!

,,, normally,it comes to 180 grd...!!!

,,,, and these would be the dimensions for some working frequencies...

 

,,, if you want an antenna on the frequency of 1280MHx,maybe I can help you

Thank you very appreciated.!!

Here is my 1280mhz Pepperbox.I don't know if the matching network will work and matched this two crosshair.I use rg179(75ohm) coax Lamda/4 *vf to match the impedance of 100ohm to 50ohm back to receiver.is it correct?

 

[Admin 2545]

,,, be attentive to the coaxial cable portion with 75Ohm impedance...!!!

[Chafer 1]

great job and good simulation work with CST.

the VSWR is ok but i want to know how about the axial performance? in my opinion the vswr can be wideband but the axial performance will be narrow band of crosshair antenna.

Edited November 13, 2023 by Chafer