Cgorney,
I don't know about your experience in RF but there is many ways to trace an antenna on a PCB, all depend on you space constraint, desired gain, range, etc. If you don't have RF equipment like a network analyzer you should consider buying a SMD antenna like www.linxtechnologies.com...
This is a paper that help me understand F antenna
http://www.loe.ee.upatras.gr/EM/Journals/Analysis%20and%20Design%20of%20an%20Inverted%20F%20Antenna%20Printed%20on%20a%20PCMCIA%20Card%20for%20the%202.4%20GHz%20ISM%20band.pdf
Hope this may help !
Thanks !
FriendlyBen [elf]
VE1BLL,
I agree with you !
Actually for me I have a fair good radiation pattern and I already reach my electric 1/4 Lambda lenght by layout strategy (Printed inverted F folded monopole). I think that the corporate already found that using the same pcb for both 433MHz and 868MHz for printed...
Hi FrankTCS,
At 433MHz I got a working design, meaning in production.
At 868MHz the solder mask make me face a big self oscillation problem.
The answer to your question is subject to interpretation: "Did I get a good gain" for a personnal point of view I would say, not enough now ! But for the...
Hi saintjohn, the apostle :-)))?
At the place I worked before, one of our customer, a local TV station was facing a kind of interference at 4 GHz, The downlink feed from the mother station was freezing from time to time. We finally found out that the parking lot light was defect and located...
HI RFtweaker,
I am an RF technician, the way I use to do it is trial and error. I moved my ground and feed point until i get 50 ohms on the network analyser. Also I cut the length of the antenna until I get the max power out. It's an almost blind process and time consumming also. Right now I try...
Hi everyone
Right now I got 7 dB improve with a PIFA/meanderline like antenna at 433 MHz. DOUBLE THE RANGE ! great ! let's try 868 MHz for the next weeks...to be continue...
Thank's to everybody ideas!
Thanks !
FriendlyBen [elf]
Hi Comcokid,
I am doing both frequencies on the same antenna (I must use the same pcb layout), both have a matching circuit and both shown about the same attenuation. Thank you to remember me Linx tech. I already try somes samples, it's very good for the size. They play with the feed point...
Hi everybody,
I want to radiate out of a 1" X 1½" board at 434 and 868 MHz ISM band. I am now 27 dB lower with that small loop around the board pcb antenna in both frequencies than a bigger board which have an helical wire antenna. Both project have the same short range transmitter...
