Ratio-adjustable power splitters for array-compressed parallel transmission.

ABSTRACT:

Purpose

To implement and validate low-loss ratio-adjustable power splitters (RAPS) for array-compressed parallel transmission (acpTx).

Methods

In acpTx, a small number of transmit channels drive a larger number of transmit coils, which are connected via an array compression network that implements optimized coil-to-channel combinations. Previous networks comprised a bank of power splitters, followed by attenuators to implement the amplitudes of the compression weights for each coil, but this resulted in high power dissipation in the network. Recognizing that an acpTx network need only implement relative attenuations between outputs, a RAPS circuit was developed which combines power splitting and relative attenuation, and has low insertion loss. RAPS circuits were experimenta

SUBMITTER: Yan X 

PROVIDER: S-EPMC5792383 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature