To All, I have few queries. 1> How to determine the shape of inductor to be drawn on PCB. whether it's spiral circular or rectangular (with 45 or 90 degrees bent).Is there any calculation. 2> How to draw antenna shape. Any calculation & how to simulate it. 3> Is there any way to make pcb trace act like High pass filter or Low pass filter. Few years back a layout guru showed its possible, but didn't like to disclose how. 4> What are the rules for designing RF layout. Personally,I want to have information about RF layout (like cellular phone, RF transmitter & receivers). Is there any open document / layout / Gerber files on internet? Pls pass the link if anyone has. Thanks in advance. Trilok Budathoki GE - India Business Center *: 91-40-27881731 * : trilok.budathoki@xxxxxx