Claims
- 1. A high temperature superconductor mini-filter comprising:
(a) a substrate having a front side and a back side; (b) at least two self-resonant spiral resonators in intimate contact with the front side of the substrate, each of said resonators independently comprising a high temperature superconductor line oriented in a spiral fashion (i) such that adjacent lines are spaced from each other by a gap distance which is less than the line width; and (ii) so as to form a central opening within the spiral, the dimensions of which are approximately equal to the gap distance; (c) at least one inter-resonator coupling; (d) an input coupling circuit comprising a transmission line with a first end connected to an input connector of the filter and a second end coupled to a first one of the at least two self-resonant spiral resonators; (e) an output coupling circuit comprising a transmission line with a first end connected to an output connector of the filter and a second end coupled to a last one of the at least two self-resonant spiral resonators; (f) a blank high temperature superconductor film disposed on the back side of the substrate as a ground plane; (g) a film disposed on the blank high temperature superconductor film as the contact to a case for said mini-filter; (h) a superstrate having a front side and a back side, wherein the front side of the superstrate is positioned in intimate contact with the at least two resonators disposed on the front side of the substrate; (i) a second blank high temperature superconductor film disposed at the back side of the superstrate as a ground plane; and (j) a second film disposed on the surface of said second high temperature superconductor film as a contact to a case for said minifilter.
- 2. The mini-filter of claim 1 wherein the superstrate is smaller in size than the substrate; and wherein the first end of the input coupling circuit and the first end of the output coupling circuit are each located outside the dimensions of the superstrate.
- 3. A high temperature superconductor mini-multiplexer comprising:
(a) at least two mini-filters, each mini-filter having a frequency band which is different from and does not overlap with the frequency bands of each other mini-filter; (b) a distribution network with one common port as an input for the mini-multiplexer and multiple distributing ports, wherein one distributing port is connected to a corresponding input of one mini-filter; and (c) a multiple of output lines, wherein one output line is connected to a corresponding output of one mini-filter; wherein each of said at least two mini-filters comprises: (d) a substrate having a front side and a back side; (e) at least two self-resonant spiral resonators in intimate contact with the front side of the substrate, each of said resonators independently comprising a high temperature superconductor line oriented in a spiral fashion (i) such that adjacent lines are spaced from each other by a gap distance which is less than the line width; and (ii) so as to form a central opening within the spiral, the dimensions of which are approximately equal to the gap distance; (f) at least one inter-resonator coupling; (g) an input coupling circuit comprising a transmission line with a first end connected to an input connector of the filter and a second end coupled to a first one of the at least two self-resonant spiral resonators; (h) an output coupling circuit comprising a transmission line with a first end connected to an output connector of the filter and a second end coupled to a last one of the at least two self-resonant spiral resonators; (i) a blank high temperature superconductor film disposed on the back side of the substrate as a ground plane; and (j) a film disposed on the blank high temperature superconductor film as the contact to a case for said mini-filter.
- 4. The mini-multiplexer of claim 3 wherein each of said self-resonant spiral resonators has a shape selected from the group consisting of rectangular, rectangular with rounded corners, polygon and circular.
- 5. The mini-multiplexer of claim 3 wherein a conductive tuning pad is disposed in the central opening of one or more of said self-resonant spiral resonators.
- 6. The mini-multiplexer of claim 3 wherein each self-resonant spiral resonator is selected from the group consisting of YBa2Cu3O7, Tl2Ba2CaCu2O8, TlBa2Ca2Cu3O9, (TlPb)Sr2CaCu2O7 and (TlPb)Sr2Ca2Cu3O9.
- 7. The mini-multiplexer of claim 3 wherein each high temperature superconductor film is selected from the group consisting of YBa2Cu3O7, Tl2Ba2CaCu2O8, TlBa2Ca2Cu3O9, (TlPb)Sr2CaCu2O7 and (TlPb)Sr2Ca2Cu3O9.
- 8. The mini-multiplexer of claim 3 wherein each substrate is selected from the group consisting of LaAlO3, MgO, LiNbO3, sapphire and quartz.
- 9. The mini-multiplexer of claim 3 wherein one or more of said mini-filters contains an odd number of self-resonant spiral resonators with one resonator being centrally located and wherein the centrally located resonator comprises a double spiral form resonator comprising two connected spiral lines with a 180-degree rotational symmetry.
- 10. The mini-multiplexer of claim 3 wherein all self-resonant spiral resonators have an identical configuration selected from the group consisting of rectangles, rectangles with rounded corners, polygons and circles.
- 11. The mini-multiplexer of claim 3 wherein the input and output coupling circuits are in the parallel lines form and each comprises:
(a) a microstrip line, (b) a gap between the said microstrip line and the first resonator for the input coupling circuit, or the last resonator for the output coupling circuit, of the said mini-filter, and (c) a gold pad at the end the microstrip line.
- 12. The mini-multiplexer of claim 3 wherein one or more of said mini-filters further comprises:
(k) a superstrate having a front side and a back side, wherein the front side of the superstrate is positioned in intimate contact with the at least two resonators disposed on the front side of the substrate; (l) a second blank high temperature superconductor film disposed at the back side of the superstrate as a ground plane; and (m) a second film disposed on the surface of said second high temperature superconductor film as a contact to said case for said mini-filter.
- 13. The mini-multiplexer of claim 12 wherein the superstrate is smaller in size than the substrate; and wherein the first end of the input coupling circuit and the first end of the output coupling circuit are each located outside the dimensions of the superstrate.
- 14. The mini-multiplexer of claim 12 wherein each high temperature superconductor film is selected from the group consisting of YBa2Cu3O7, Tl2Ba2CaCu2O8, TlBa2Ca2Cu3O9, (TlPb)Sr2CaCu2O7 and (TlPb)Sr2Ca2Cu3O9.
- 15. The mini-multiplexer of claim 12 wherein each substrate and superstrate are selected from the group consisting of LaAlO3, MgO, LiNbO3, sapphire and quartz.
- 16. The mini-multiplexer of claim 12 wherein a conductive tuning pad is disposed in the central opening of one or more of said self-resonant spiral resonators.
- 17. The mini-multiplexer of claim 12 wherein each self-resonant spiral resonator is selected from the group consisting of YBa2Cu3O7, Tl2Ba2CaCu2O8, TlBa2Ca2Cu3O9, (TlPb)Sr2CaCu2O7 and (TlPb)Sr2Ca2Cu3O9.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of application Ser. No. 09/592,466, filed Jun. 9, 2000 (which is incorporated as a part hereof as fully as if set forth at length herein), which is a continuation of application Ser. No. 09/079,467, filed May 15, 1998, now U.S. Pat. No. 6,108,569.
Continuations (2)
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Number |
Date |
Country |
Parent |
09592466 |
Jun 2000 |
US |
Child |
10051912 |
Jan 2002 |
US |
Parent |
09079467 |
May 1998 |
US |
Child |
10051912 |
Jan 2002 |
US |