Can anyone provide a reference design for a 434 MHz PCB Trace Antenna? Is it just a matter of creating a snake trace pattern about 17cm long and slapping a ground plane under it (with a trace thickness for say 50 ohms characteristic impedance to the ground plane given the PCB thickness)?
The context is that I think I'm heading toward using a trace antenna with the RFM12B transceiver module en route to passing regulatory standards. I've been told that embedding the antenna in the PCB is an easier / lower cost path to certification than allowing for a whip (or other externally connected) antenna. Any advice or pointers would be most appreciated!
Answer
Tye following may be useful. Most are 2.4 GHz focused but should provide some useful ideas.
TI 2.4 GHz PCB Antenna - AN 043 - 2.4 GHz but should have significant value.
Compact Integrated antennas - Freescale AN 2731 - significant relevance
A few zillion PCB antennas - all images linked to webpages
Commercial products - but some good idea starters
Inverted F design - 2.4 GHz but significant relevance
Wow Another inverted ed F design paper - looks superb
NO PCB antennas here BUT many432 MHz antennas
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