Kongsberg Gruppen has patented a filter correction unit for radio frequency transmission lines, including a band pass filter with a surface acoustic wave (SAW) transducer to reduce known signal distortion. The technology aims to flatten the frequency response by matching and reducing passband amplitude peaks. GlobalData’s report on Kongsberg Gruppen gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Kongsberg Gruppen, was a key innovation area identified from patents. Kongsberg Gruppen's grant share as of May 2024 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
Filter correction unit for rf transmission lines to flatten frequency response
A recently granted patent (Publication Number: US11962290B2) discloses a filter correction unit designed to work in conjunction with a band pass filter utilized in radio frequency transmission systems. The filter correction unit features surface acoustic wave (SAW) transducers with specific electrode configurations on a piezoelectric substrate. These transducers are strategically employed to adjust the frequency-dependent loss, aligning the transmitted signal's amplitude with the inverse of the band pass filter's response. By reducing the passband amplitude peaks, the frequency response of the passband is effectively flattened, enhancing the overall performance of the system.
Furthermore, the patent details the integration of the filter correction unit into a radio frequency filter, where the band pass filter consists of grounded capacitive filter elements. Through the SAW transducers, the necessary capacitance is achieved to define the band pass filter response while also addressing impedance matching concerns. The configuration of the SAW transducers, coupled with the grounded capacitive filter elements, ensures that the transmitted signal aligns with the desired response of the radio frequency filter. The patent also explores various design options for the band pass filter, including LC filters, coupled transmission lines in comb-line structures, and the incorporation of microstrip or strip lines within the filter.
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