Back to results
US 11,888,203 B2Granted
Filter device
AssigneeFujikura Ltd.
InventorYusuke Uemichi
Life of this patent
Estimating the term…
Abstract
A filter device having desired characteristics is easily designed. The filter device includes a post-wall waveguide functioning as a resonator group including five congruent resonators (R1 to R5). The resonators (R1, R2) include therein respective control posts (CP1, CP2), and a shortest distance (di) from the control post (CPi) to a narrow wall of the resonator (Ri) satisfies d1>d2. The resonators (R4, R5) include therein respective control posts (CP4, CP5), and a shortest distance (dj) from the control post (CPj) to a narrow wall of the resonator (Rj) satisfies d4<d5.
Claims15
A filter device comprising
- a post-wall waveguide functioning as a resonator group including n resonators R1, R2, . . . , Rn (n is an odd number not less than five) which are electromagnetically coupled together and which are congruent with each other,
- the resonators R1, R2, . . . , R(n−1)/2 being configured such that (1) each resonator Ri (i=1, 2, . . . , (n−1)/2) includes therein a control post CPi and (2) a shortest distance di from the control post CPi to a narrow wall of the resonator Ri satisfies d1>d2> . . . >d(n−1)/2,
- the resonators R(n+1)/2+1, R(n+1)/2+2, . . . , Rn being configured such that (1) each resonator Rj (j=(n+1)/2+1, (n+1)/2+2, . . . , n) includes therein a control post CPj and (2) a shortest distance dj from the control post CPj to a narrow wall of the resonator Rj satisfies d(n+1)/2+1<d(n+1)/2+2< . . . <dn.
A filter device comprising
- a post-wall waveguide functioning as a resonator group including n resonators R1, R2, . . . , Rn (n is an even number not less than six) which are electromagnetically coupled together and which are congruent with each other,
- the resonators R1, R2, . . . , Rn/2−1 being configured such that (1) each resonator Ri (i=1, 2, . . . , n/2−1) includes therein a control post CPi and (2) a shortest distance di from the control post CPi to a narrow wall of the resonator Ri satisfies d1>d2> . . . >dn/2−1,
- the resonators Rn/2+2, Rn/2+3, . . . , Rn being configured such that (1) each resonator Rj (j=n/2+2, n/2+3, . . . , n) includes therein a control post CPj and (2) a shortest distance dj from the control post CPj to a narrow wall of the resonator Rj satisfies dn/2+2<dn/2+3< . . . <dn.
Dependencies are inferred from the claim text.