Claims
- 1. A planar comb-line filter comprising:(a) a pair of resonators disposed in a planar and parallel relationship relative to each other, said pair of resonators being separated by a distance of d2; (b) a pair of capacitor plates disposed above and below said pair of resonators, said pair of capacitor plates being in a parallel relationship relative to said pair of resonators and are separated by a distance d1, both below and above; (c) a pair of resonator extensions extending from said pair of resonators, respectively; (d) wherein said pair of capacitor plates and said pair of resonators are grounded, and said d2 and d1 have a ratio d2/d1 of at least 3.0.
- 2. The comb-line filter according to claim 1 which further comprises a pair of metal plates disposed above and below said pair of capacitor plates, respectively.
- 3. The comb-line filter according to claim 1 wherein said resonators have an electrical length less than 45°.
- 4. The comb-line filter according to claim 1 wherein said resonators have an electrical length no greater than 26.5°.
- 5. The comb-line filter according to claim 1 said ratio of d2/d1 is greater than about 9.0.
- 6. The comb-line filter according to claim 1 said ratio of d2/d1 is greater than about 50.0.
- 7. The comb-line filter according to claim 1 which has a capacitive coupling effective less than 0.1 pF.
- 8. The comb-line filter according to claim 1 which has a capacitive coupling effective no greater than 0.01 pF.
- 9. The comb-line filter according to claim 1 which further comprises an input terminal and an output terminal connected to said pair of resonator extensions, respectively.
Parent Case Info
This is a continuation-in-part application of app. Ser. No. 08/965,662, filed Nov. 6, 1997.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5497130 |
Hirai et al. |
Mar 1996 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/965662 |
Nov 1997 |
US |
Child |
09/354201 |
|
US |