Multi-band device having switch with input shunt arm

摘要

In an embodiment, an apparatus includes a first radio frequency (RF) signal path and a second RF signal path. The first RF signal path can provide a first RF signal when active and the second RF signal path can provide a second RF signal when active. The second RF signal path can include a select switch having an input shunt arm electrically coupled to an input of the select switch. The input shunt arm can be arranged such that it is on when the first RF signal path is active and/or when the second RF signal path is inactive.

主权项

1. A radio frequency front end with reduced band loading, the radio frequency front end comprising:
a first transmission path including a first power amplifier configured to provide a first radio frequency signal, a first matching network, and a first multi-throw switch configured to receive the first radio frequency signal by way of the first matching network; and a second transmission path including a second power amplifier configured to provide a second radio frequency signal that is within a different frequency band than the first radio frequency signal, a second matching network, and a second multi-throw switch configured to receive the second radio frequency signal at an input by way of the second matching network, the second multi-throw switch having a plurality of throws that are coupled to a passive impedance element, the passive impedance element being in series with an input shunt arm between the input of the multi-throw switch and a ground potential.