System and method for controlling radio frequency transmissions from an electronic device

An electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device, comprising:

• a printed circuit board ‘PCB’ having said power amplifier mounted on said PCB;
• a first electrical track in said PCB connecting to a power input terminal of said power amplifier;
• a first capacitor connected to said first electrical track and a ground reference in said PCB, said first capacitor reducing transmission of radio frequency signals from said input terminal of said power amplifier;
• a first high filter choke having a first connection connecting to said first electrical track and said first capacitor and a second connection connecting to a battery;
• a second capacitor connected to said first electrical track between said input terminal and said first high filter choke;
• a filtering stage connected to an output terminal of said power amplifier;
• and
• a 0 ohm component connected to said filtering stage to delay output signals from said output terminal.

An electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device, comprising:

• a printed circuit board ‘PCB’ having said power amplifier mounted on said PCB;
• a first electrical track in said PCB providing part of a connection from a high band power input terminal of said power amplifier to a battery terminal;
• a first capacitor connected to said first electrical track, said high band power input terminal and a ground reference in said PCB;
• a second capacitor connected in parallel to said first capacitor and connected to said first electrical track, said high band power input terminal and said ground reference;
• a first inductor having a first end connected to said first electrical track and a second end connected to a battery terminal;
• a second electrical track connected to a low band power input terminal of said power amplifier;
• a second inductor a having a first end connected to said second electrical track and a second end connected to said battery terminal;
• a third capacitor having a first end connected to said first and said second inductors and said battery terminal and a second end connected to said ground reference;
• and
• a fourth capacitor having a first end connected to said second electrical track and a second end connected to said ground reference,
• wherein
• said first and said second capacitors reduce transmission of radio frequency signals from said high band input terminal of said power amplifier in said first electrical track to said battery terminal;
• said third capacitor reduces transmission of radio frequency signals from said power amplifier to said battery terminal;
• and
• said fourth capacitor reduces transmission of radio frequency signals from said low band input terminal of said power amplifier in said second electrical track to said battery terminal.