System and Method for a Radio Frequency Switch

An antenna switch comprising:

• a first switching network configured to operate at a first frequency range, the first frequency range including a first frequency;
• a second switching network configured to operate at a second frequency range, the second frequency range being higher in frequency than the first frequency range;
• an output port configured to be coupled to an antenna;
• a first filter coupled between the first switching network and the output port, the first filter having a pass band comprising the first frequency range, and a stop band comprising a second frequency that is a harmonic of the first frequency;
• and
• a second filter coupled between the second switching network and the output port, the second filter having a pass band comprising the second frequency range and a stop band comprising the first frequency.

An RF transmission system comprising:

• a first transmitter configured to operate within a first frequency range, the first frequency range including a first frequency;
• a second transmitter configured to operate within a second frequency range, the second frequency range higher than the first frequency range;
• an output port;
• a first switch coupled between the first transmitter and the output port;
• a second switch coupled between the second transmitter and the output port;
• a first filter coupled between the first switch and the output port, the first filter having a pass band comprising the first frequency range, and a stop band comprising the second frequency, the second frequency being a harmonic of the first frequency;
• and
• a second filter coupled between the second switch and the output port, the second filter having a pass band comprising the second frequency range and a stop band comprising the first frequency.

A method of operating an antenna switch comprising a first switching network configured to operate at a first frequency range, a second switching network configured to operate at a second frequency range, an output port configured to be coupled to an antenna, a first filter coupled between a first switching network and the output port, and a second filter coupled between the second switching network and the output port, the method comprising:

• coupling a RF transmitter to the output port via the first switching network, coupling comprising turning-on a switch within the first switching network;
• transmitting a signal at a first frequency with the RF transmitter, wherein the first frequency is within the first frequency range;
• attenuating a harmonic of the first frequency with the first filter;
• passing the first frequency though the first filter;
• and
• attenuating the first frequency with the second filter.