Add-on components for cheap thick film microwave circuits
Abstract
The feasibility of (1) surface mounted circulators for cheap microwave integrated circuits, and (2) hybrid microwave integrated circuit thin film cut-off filters for thick film circuits, was investigated. Two ways of making a surface mounted circulator by adding ferrite to the surface of a thick film circuit in order to avoid any machining of the substrate were studied. While performance results for a disk circulator, demonstrated in the laboratory, are encouraging, attempts to produce a lumped element circulator failed. For the other component, a filter, a technique of implanting this component on otherwise completed thick film substrates, allowing the use of high definition components at minimal cost, was sought. A process for the transfer of thin film component patterns from a carrier to the main substrate is defined. The performance of a stop-band filter transferred into thick film and copper laminate circuits is satisfactorily compared with wholly thin film constructed components.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1979
- Bibcode:
- 1979STIN...8124375M
- Keywords:
-
- Circulators (Phase Shift Circuits);
- Hybrid Circuits;
- Microwave Circuits;
- Microwave Filters;
- Thick Films;
- Bandpass Filters;
- Cost Reduction;
- Insertion Loss;
- Metal-Metal Bonding;
- Microstrip Transmission Lines;
- Thin Films;
- Electronics and Electrical Engineering