Abstract: A radio frequency filter includes at least a first sub-filter and a second sub-filter connected in parallel between a first port and a second port. Each of the sub-filters has a piezoelectric plate having front and back surfaces, the back surface attached to a substrate, and portions of the piezoelectric plate forming diaphragms spanning respective cavities in the substrate. A conductor pattern is formed on the front surface of the plate, the conductor pattern includes interdigital transducers (IDTs) of a respective plurality of resonators, with interleaved fingers of each IDT disposed on a respective diaphragm of the plurality of diaphragms. A thickness of the portions of the piezoelectric plate of the first sub-filter is different from a thickness of the portions of the piezoelectric plate of the second sub-filter.

Abstract: A robust system and method for positioning and heading for guidance or logging agricultural input placement amounts and locations is disclosed and can be used to aid or direct treatment of a field that has only partial or temporary access to a reliable GNSS signal. The guidance information or data can be stored in memory and output to a video display terminal or the visual display of a computing unit (e.g. laptop or user mobile phone) or alternative formatted or translated to produce an output on a heads-up display such as a light bar.

Abstract: A robust system and method for positioning and heading for guidance or logging agricultural input placement amounts and locations is disclosed and can be used to aid or direct treatment of a field that has only partial or temporary access to a reliable GNSS signal. The guidance information or data can be stored in memory and output to a video display terminal or the visual display of a computing unit (e.g. laptop or user mobile phone) or alternative formatted or translated to produce an output on a heads-up display such as a light bar.