Patent ID: 7650163

Claim:
An impedance matching method for a multi-band radio frequency device, said impedance matching method comprising: selectively outputting a first radio frequency signal comprised in a first sub-band of a multi-band radio frequency signal; selectively outputting a second radio frequency signal comprised in a second sub-band of said multi-band radio frequency signal, said first and second selectively outputting being done without applying switching in a signal path, wherein said first and second frequency sub-bands pass through a common reactive element, said common reactive element further comprising an inductor; wherein a first frequency selective sub-network for outputting said first radio frequency signal comprises a common reactive element of a first type, and a first reactive element of a second type, and a second frequency selective sub-network for outputting said second radio frequency signal comprises said common reactive element, and a second reactive element of said second type, said first and second reactive elements being arranged in series, said first radio frequency signal being outputted at a first node of said series arrangement and said second radio frequency signal being outputted at a second node of said series arrangement, wherein said first node is located in a signal path between said first and second reactive elements.