System including a high directivity ultra-compact coupler

Details System including a high directivity ultra-compact coupler System including a high directivity ultra-compact coupler

2007-05-10

2008-08-19

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S109000

Reexamination Certificate

active

07414493

ABSTRACT:
A system with an RFin terminal and an RFout terminal includes an output matching network. The system further includes a coupler having a thru arm connected between the output matching network and the RFout terminal, and a coupled arm connected to a detector circuit. The coupler further includes a stack of first and second dielectric materials having different dielectric constants. The stack of first and second dielectric materials extends over a top surface of a substrate. The thru arm and the coupled arm extend over the stack of first and second dielectric materials in the same plane parallel to a surface of the substrate.

REFERENCES:
patent: 6483398 (2002-11-01), Nagamori et al.
patent: 6603960 (2003-08-01), Oida et al.
patent: 7088201 (2006-08-01), Piernas
Dydyk, M., “Microstrip Directional Couplers with Ideal Performance via Singe-Element Compensation,” IEEE Trans. Microwave Theory and Techniques, 47(6):956-964 (1999).
March, S.L., “Phase Velocity Compensation in Parallel-Coupled Microstrip,” IEEE MTT-S Digest, pp. 410-412 (1982).
Paolino, D.D., “MIC Overlay Coupler Design Using Spectral Domain Techniques,” IEEE Trans. Microwave Theory and Techniques, MTT-26(9):646-649 (1978).
Podell, A., “A High Directivity Microstrip Coupler Technique,” IEEE MTT-S Symp. Digest, pp. 33-36 (1970).

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