Inverted F antenna for CC2500

[Riddik]

Hi to all!
Please help me! I want to use CC2500 in my device with planar inverted F antenna according to Design Note DN007 of Texas Instruments. I want to recalculate widths and lenths according to my material of substrate for antenna. In DN007 widths and lenths of microstrip lines of antenna gives in absolute values and there is no parameters of material of substrate such as thicknes, loss tangent and dielectric constant. For recalculating antenna I need to know this parameters. Who can tell me about material, described in DN0007 of Texas Instruments. Thank you very much for your answers.

 

[vfone]

From page 3:

"Since there is no ground plane beneath the antenna, PCB thickness will have little effect on the performance. The results presented in this design note are based on an antenna implemented on a PCB with 1 mm thickness."

 

[Riddik]

From page 3:

"Since there is no ground plane beneath the antenna, PCB thickness will have little effect on the performance. The results presented in this design note are based on an antenna implemented on a PCB with 1 mm thickness."

Thank you for your answer, I saw that, but I don't know, what is dielectric constant of this material. For example, if this material is FR-4, dielectric constant is 4.5, so clearence L8 between 50-Ohm line W2=0.46 and ground must be 0.1mm, but in DN0007 L8=0.45mm...