MICROWAVE BAND-PASS FILTER WITH WIDE STOPBAND USING L-SHAPED SLOTTED MICROSTRIP RESONATORS
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United States of America
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Apr 3, 2025
app pub date -
Sep 27, 2024
filing date -
Sep 27, 2024
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Abstract
A wide-stopband high-frequency band-pass filter using L-shaped slotted microstrip resonators, where the filter's nearest spurious frequency is approximately 3.5 times the center frequency f0. The filter consists of the following components: dielectric substrate, copper layer, L-shaped slotted microstrip resonators, 50-Ohm impedance microstrip lines, and high-frequency connectors. The microstrip filter is implemented on a two-layer printed circuit board, designed by resonantly coupling the L-shaped slotted microstrip lines. It features a compact size and a wide stopband using a completely new resonant pattern, the L-shaped slotted microstrip line, which creates a filter with a wide stopband of approximately 2.5 f0. This design is significantly smaller than conventional filters at the same frequency that have a narrower stopband. The input and output high-frequency connectors are directly connected to the resonator through inductive or capacitive coupling via the 50-Ohm impedance line.
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