Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Interaction of PZT blocks with the quadrature excitation RF field. The increase in transmit efficiency varies with the number of PZT blocks (dotted black lines). Simulated fields, shown here for zero (a), five (b), seven (c), and nine (d) blocks, were normalized with respect to 1 W of tissue dissipated power. The transmit field shows the largest increase with seven connected blocks.
