Inclusion of peripheral circuit elements in the design synthesis of slanted array compressors

The use of a self-consistent adjustment of the local acoustic beamwidth in the design of slanted array compressors (SACs) is effective for the case of wide bandwidth, moderate to high time-bandwidth (TB) product devices. Difficulty arises in the design of devices of relatively small fractional bandwidth and low TB product, in particular, when spectral weighting is also required. A solution to this difficulty requires the inclusion of predetermined peripheral circuit elements during design synthesis. This effects a different distribution among the various loss factors, and reduces the burden of beamwidth adjustment, thus alleviating the need for extreme source contour incline angle and curvature. Several peripheral circuit types are considered for the design of an 8% fractional bandwidth, 50 TB product, weighted L-band SAC pulse compressor. These include a single shunt resistive element, and a shunt resistor with a shunt capacitor. A post-fabrication selectable on-chip printed resistor is discussed. Results from devices achieving 26-dB midband insertion loss and greater than 26-dB suppression of the compressed pulse time sidelobes are shown