Patent ID: 7656251

Claim:
Radio frequency (RF) circuitry comprising: a first sub-band duplexer adapted to: receive and filter a first transmit signal using a first transmit bandpass filter having a first transmit bandwidth and a first transmit passband center frequency to provide a first filtered transmit signal; and receive and filter a first receive signal using a first receive bandpass filter having a first receive bandwidth and a first receive passband center frequency to provide a first filtered receive signal, such that the first receive bandwidth is less than the first transmit bandwidth; a second sub-band duplexer adapted to: receive and filter a second transmit signal using a second transmit bandpass filter having a second transmit bandwidth and a second transmit passband center frequency to provide a second filtered transmit signal, such that the second transmit bandwidth is less than the first transmit bandwidth; and receive and filter a second receive signal using a second receive bandpass filter having a second receive bandwidth and a second receive passband center frequency to provide a second filtered receive signal, such that the first receive bandwidth is less than the second receive bandwidth and the second transmit bandwidth is less than the second receive bandwidth; a first amplifier adapted to receive and amplify the first filtered receive signal to provide a first amplified filtered receive signal; and a second amplifier adapted to receive and amplify the second filtered receive signal to provide a second amplified filtered receive signal, wherein the first transmit bandwidth at a transmit filter breakpoint does not overlap the first receive bandwidth at a receive filter breakpoint, and the second transmit bandwidth at the transmit filter breakpoint does not overlap the second receive bandwidth at the receive filter breakpoint.