LHCP/RHCP patch antenna 2400Mhz QO-100 WA5VJB

Hi

It works. The signal was around 2dB below the POTY at my 1.2m prime focus .

Best regards

Alex

Hi, using a similar antenna from a TV transmitter take about 2 dB down from 3 turns helical in a 1m offset dish.

Hello

has anyone has the dimensions of this antenna ?

Is it possible to measure it ? and give the data ?

I would buy it if I could but its not available anumore

Tnx

Here ar a view calculators:

https://www.pasternack.com/t-calculator-microstrip-ant.aspx

em: talk - Microstrip Patch Antenna Calculator

Microstrip Patch Antenna Calculator - everything RF

Microstrip Patch Antenna Calculator - Engineering Calculators & Tools

This tool calculates the dimensions of the microstrip patch antenna given the desired operating frequency.

www.allaboutcircuits.com

Mikrostreiken-Patch-Antenne berechnen: Kostenloser Rechner | Altium

Mikrostreifen-Patch-Antennen sind einfach, aber hocheffizient. Nutzen Sie den kostenlosen Rechner von Altium, um eine Antenne für Ihr Design zu berechnen.

resources.altium.com

https://users.utcluj.ro/~crisan/microstrip-rectangular-patch-antenna-calculator.html

This links should help you.

Hallo,

a combination of a patch-antenna with reflector disk and "looking through" LNB is successful used by so many stations. The dimensions of the patch are available in the net. All other compromises go in the wrong direction. Adjusting the distance between the patch and the reflector at some points, the correct matching diagram can be achieved with the help of small network analyzer. My recommendation is a SAA-2N. It has N-connectors, a calibration kit for SOLT and a case. The dynamic range is remarkably.

A lathe can be helpful to assemble a patch. If the reflector is made of brass 1mm and the patch itself of copper 0,5 it's easy to adjust. Even LNBs with a horn can be used. Remove the horn and drill a little brass tube to carry the patch with reflector. Add a plastic lense from an

useless LNB.

Soldering is easy with hot air. Between reflector and patch there is a 3mm gap. Fix it while soldering with some pieces of 3mm thickness.

By the way, a clear difference with this patches and normal helix antennas with 3,5 windings couldn't be found. If a helix is mounted on a similar reflector disk with brass tube, antennas are easy to change for performance compare.

Have fun, 73
Andreas

Tnx evryone, for reacting..

I needed the dimensions for making myself..

I have allready a Poty, but I have a spare Wifi Dish ( 24dB ) also, which I will use for TX only

Therefote I need an exciter LHCP, to put in focus of the primefocus wifi dish

A smalll LHCP PCB should fit nicely !

I made allready a LCHP Helix 2 windings and works OK.. so I will compare to a Patch PCB feed ( but LHCP

I dont find any calculators which calculate the Circulair polarization

Any dimensions welcome

Oh yes, the holder I designed myself and printed on my 3D printer

JP

Quote from ON7MA

I dont find any calculators which calculate the Circulair polarization

This is the original POTY site: http://www.hybridpretender.nl/poty.html

See "Original publication"

Yes Thomas, I know, I have poty allready some years

But this is no explanation for a PCB Antenna or calculator or simulation program