Question to RF Experts about Antenna integration

[onchip_systems]

Imagine that we try to integrate antennas over silicon chips. We know that epitaxial layer has conductivity that makes the radiating effeciency of the antenna falling down. What do you think about a method that acraps the epitaxial layer to reduce its influence upon the radiating effeciency of the antenna, just like the patterned ground used for self inductors.
Is it a good idea? can it be object of a pattern.

 

[mrm]

Try to be more clear. I don't understand what you're saying. About antennas I red something about patches over a SiO2 layer...
Bye

 

[onchip_systems]

The dipole antenna is etched over the oxide (SiO2) and between the oxyde and the Silicon substrate their is a thin layer called "Epitaxial layer".
This layer is conductive, and its conductivity makes the radiating efficiency of the antenna falling down.
Th epitaxial layer is needfull to realize active compnent such like transistors, but it also reduce the effeciency of the antenna, so we cannot remove this layer, but may be we can reduce its influence upon the antenna by excavating some pieces of the epitaxial layer and hence reducing its effects on the antenna. What do you think about this?

THX

 

[atmaca]

The dipole antenna is etched over the oxide (SiO2) and between the oxyde and the Silicon substrate their is a thin layer called "Epitaxial layer".
This layer is conductive, and its conductivity makes the radiating efficiency of the antenna falling down.
Th epitaxial layer is needfull to realize active compnent such like transistors, but it also reduce the effeciency of the antenna, so we cannot remove this layer, but may be we can reduce its influence upon the antenna by excavating some pieces of the epitaxial layer and hence reducing its effects on the antenna. What do you think about this?

THX

Epitaxy is the method of changing the conductivity of silicon substrate. There is two main methods one is to dope impurity atoms into silicion substrate by some thermal process The other is to implanting impurity atoms by accelerating them in some electic field. And you can do these processess selectively by using masks. So it is not necessary to be epi layer on every part of a die. So, How can your antenna can be effected ??

Can you explain how an antenna can be implemented on a die ??

 

[onchip_systems]

the antenna is implemented on the last metal layer (the same layer used for coils). You say that epi layer process can be selective, and hence avoid to introduce epi layer under the antenna?