US 12,266,839 B2
Radio frequency pass-band filter
Jiasheng Hong, Edinburgh (GB); Jia Ni, Edinburgh (GB); and Petronilo Martin-Iglesias, Noordwijk (NL)
Assigned to European Space Agency, Paris (FR)
Appl. No. 17/277,051
Filed by European Space Agency, Noordwijk (NL)
PCT Filed Sep. 17, 2018, PCT No. PCT/EP2018/075104
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/057722, PCT Pub. Date Mar. 26, 2020.
Prior Publication US 2021/0376436 A1, Dec. 2, 2021
Int. Cl. H01P 1/203 (2006.01); H01Q 1/38 (2006.01)
CPC H01P 1/20372 (2013.01) [H01Q 1/38 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A radio frequency passband filter comprising a network of half-wavelength planar resonators, wherein at least one of the half-wavelength planar resonators includes a resistor shunted to ground to flatten response in the passband, and wherein different ones of the half-wavelength planar resonators have resistors with different resistance values.