Patent Application - MICROPSTRIP TRANSMISSION LINE/COPLANAR WAVEGUIDE (CPW) TRANSISTOR STRUCTURE > Claims

1. A structure comprising: a coplanar waveguide transistor; anda microwave section, coupled to the transistor, having: a strip conductor coplanar with the electrodes of the coplanar waveguide transistor and a ground plane conductor disposed under the strip conductor.
- 3. The structure recited in claim 1 including a conductive via passing into the structure electrically connecting an electrode of the transistor to the ground plane conductor.
2. A structure comprising: a coplanar waveguide transistor on a surface of the structure; anda microwave section, coupled to the transistor, having: a strip conductor disposed on said surface of the structure; and a ground plane conductor disposed under the strip conductor.
- 4. The structure recited in claim 2 including a conductive via passing into the structure electrically connecting an electrode of the transistor to the ground plane conductor.
5. A structure comprising: (A) a substrate;(B) a transistor on a surface of the substrate, such transistor having a control electrode for controlling a flow of carriers between a pair of electrodes; wherein the control electrode is a coplanar waveguide structure having a center conductor on the surface of the structure and a pair of ground plane conductors disposed adjacent the center conductor on the surface of the structure, wherein the center conductor terminates in a plurality of fingers on the surface of the structure;wherein a first one of the pair of electrodes is a coplanar waveguide structure having a center conductor and ground plane conductors disposed on the surface of the structure adjacent the center conductor, wherein the center conductor of the first one of the pair of electrodes terminates in a plurality of fingers on the surface of the structure;wherein the second one of the pair of electrodes comprises: a plurality of conductive pads disposed on the surface of the structure, each one of the control electrode fingers being disposed between a corresponding one of the first electrode fingers and a corresponding one of the second electrode conductive pads;a plurality of air bridge conductors disposed over the surface of the structure electrically interconnecting the plurality of conductive pads;(C) a microstrip input section coupled to the control electrode comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the control electrode; and a first ground plane portion disposed on an opposite surface of the substrate under the strip conductor microstrip input section;(D) a microstrip output section coupled to the second one of the pair of electrodes comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the second one of the pair of electrodes; and a second ground plane portion disposed on an opposite surface of the substrate under the strip conductor of the microstrip output section; and(E) a plurality of conductive vias passing through the substrate between a corresponding pair of the conductive pads and a corresponding pair of underlying ground plane portions disposed on an opposite surface of the substrate.
6. A structure comprising: a substrate;a transistor disposed on a surface of the substrate having a control electrode for controlling a flow of carriers between a pair of electrodes; wherein the control electrode is a coplanar waveguide structure having a center conductor on the surface of the structure and a pair ground plane conductors disposed adjacent the center conductor on the surface of the structure, wherein the center conductor terminates in a plurality of fingers on the surface of the structure;wherein a first one of the pair of electrodes is a coplanar waveguide structure having a center conductor and ground plane conductors disposed on the surface of the structure adjacent the center conductor, wherein the center conductor of the first one of the pair of electrodes terminates in a plurality of fingers on the surface of the structure;wherein the second one of the pair of electrodes comprises: a plurality of conductive pads disposed on the surface of the structure, each one of the control electrode fingers being disposed between a corresponding one of the first electrode fingers and a corresponding one of the second electrode conductive pads; anda plurality of air bridge conductors disposed over the surface of the structure electrically interconnecting the plurality of conductive pads; andwherein a pair of the conductive pads of the second one of the pair of electrodes provides the pair of ground plane conductors for the control electrode and the first one of the pair of electrodes.
- 7. The structure recited in claim 6 including a plurality of vias passing though the substrate to electrically connect a ground plane conductor on of an opposite surface of the substrate to the pair of conductive pads of the second one of the pair of electrodes.
  - 8. The structure recited in claim 7 including a microstrip input section is coupled to the control electrode comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the control electrode; and a ground plane conductor disposed on the opposite surface of the substrate under the strip conductor microstrip input section.
    - 9. The structure recited in claim 8 including a microstrip output section is coupled to the second one of the pair of electrodes comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the second one of the pair of electrodes; and a ground plane conductor disposed on the opposite surface of the substrate under the strip conductor of the microstrip output section.
10. A structure comprising: a substrate;a transistor disposed on a surface of the substrate having a control electrode for controlling a flow of carriers between a pair of electrodes; wherein the control electrode is a coplanar waveguide structure having a center conductor on the surface of the structure and a pair ground plane conductors disposed adjacent the center conductor on the surface of the structure;wherein a first one of the pair of electrodes is a coplanar waveguide structure having a center conductor and ground plane conductors disposed on the surface of the structure adjacent the center conductor;wherein the second one of the pair of electrodes comprises a pair of conductive pads providing the pair of ground plane conductors for the control electrode and the first one of the pair of electrodes.
- 11. The structure recited in claim 10 including a plurality of vias passing though the substrate to electrically connect a ground plane conductor on of an opposite surface of the substrate to the pair of conductive pads of the second one of the pair of electrodes.
  - 12. The structure recited in claim 11 including a microstrip input section is coupled to the control electrode comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the control electrode; and a ground plane conductor disposed on the opposite surface of the substrate under the strip conductor microstrip input section.
  - 13. The structure recited in claim 11 including a microstrip output section is coupled to the second one of the pair of electrodes comprising: a strip conductor disposed on the surface of the substrate and connected to the center conductor of the second one of the pair of electrodes; and a ground plane conductor disposed on the opposite surface of the substrate under the strip conductor of the microstrip output section.