Antenna for 434 MHz ASK RF transmitter module?
I have these few questions regarding aerials that can be used with a 434 MHz ASK RF Transmitter module.
https://electrosome.com/wp-content/uploads/2014/10/MO_SAWR.pdf (data sheet of the transmitter)
1)The recommended length for the antenna is 17 cm,which is a quarter of the wavelength.
Will using a 34 cm antenna(half wavelength) enhance the range of transmission? Will it get even better for 3/4 th and full wavelength long antennas?
2)Should the antenna be a monopole? Can I use a helical one instead(picture attached)? What are the ideal dimensions of a helical antenna(with respect to its wavelength) for maximum range ?
Should the antenna of the receiver be of the same type or can I have a helical transmitter antenna and monopole receiver antenna ,both of same length?
3)Does Copper traces on the printed circuit board between the antenna pin of the transmitter and the actual antenna,add to the total length of the antenna? If the answer to the previous question is yes,can using coaxial cables to connect the antenna pin to the antenna prevent this from happening?
4)Should the antenna be installed perpendicular relative to the plane of the circuit board?Has it got anything to do with grounding or anything? Should the antenna be grounded too and if so how?(I am a bit confused with this part)
5)Can having the antenna in close proximity to step down transformers and ics ,produce undesired results?