Patent ID: 9553619
Date: 2017-01-24
CPC Classifications: H03F,H03H,H04B,H04W

Claim:
1. A radio-frequency (RF) circuit comprising: a first signal path and a second signal path, the first signal path associated with a first frequency band, the second signal path associated with a second frequency band, the first signal path configured to present an approximately zero impedance to a signal in the second frequency band, and the second signal path configured to present an approximately zero impedance to a signal in the first frequency band, the signal in the second frequency band being different from the signal in the first frequency band; and a coupling circuit that couples the first and second signal paths, the coupling circuit configured such that the approximately zero impedance presented by the first signal path to the signal in the second frequency band results in the signal in the second frequency band being substantially excluded from the first signal path, and such that the approximately zero impedance presented by the second signal path to the signal in the first frequency band results in the signal in the first frequency band being substantially excluded from the second signal path.