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Compact low-cost filter for 5G interference reduction in UHF broadcasting band

Abstract: The allocation of part of the UHF band to 4G and 5G services has generated the appearance of channel interferences over the digital terrestrial television frequency band. In order to reduce these interferences, this work presents a novel and efficient band-stop filter implemented using microstrip technology. The filter, designed with rectangular split-ring resonators etched in the ground plane, provides a cutoff frequency above channel 48 (694 MHz), a high roll-off rate of 44 dB in 56 MHz and a rejection bandwidth of 250 MHz that covers the upper UHF band occupied by 4G and 5G with rejection levels close to 35 dB. The filter is manufactured entirely over a printed circuit board without lumped elements to reduce production costs, fine tuning after the assembly stage and maintenance. Moreover, it presents a compact subwavelength size of only 0.07 _ _ 0.17 _ to facilitate installation, whether at the input of the TV terminal or integrated with the balun at the rooftop antenna.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Fernández O., Fernández T., Gómez Á.,

 Fuente: Electronics, 2021, 10(8), 974

Editorial: MDPI

 Fecha de publicación: 19/04/2021

Nº de páginas: 14

Tipo de publicación: Artículo de Revista

 DOI: 10.3390/electronics10080974

ISSN: 2079-9292

Proyecto español: PGC2018-098350-B-C22