SPATIAL FIELD POWER COMBINER HAVING OFFSET COAXIAL TO PLANAR TRANSMISSION LINE TRANSITIONS

Abstract

A cylindrical multi-port combiner having a graceful degradation characteristic with a high degree of isolation (25 db) between ports and a high combining efficiency (>90°) is disclosed. A radially-spaced inner and outer conductor forms a transmission line operating in a balanced mode. Circumferentially spaced plurality of like transmission lines have inner and outer RF absorbers at the outermost regions of the spaced adjacent inner and outer conductors, respectively. A corresponding end of each transmission line in adapted to be connected to one of a corresponding number of phase-matched RF sources. The other end of each transmission line has its inner and outer conductors connected in parallel, respectively, through stepped impedance-transforming transmission lines to form one connector for connection to an output RF load. The RF field of the desired balanced mode does not extend beyond adjacent inner and outer conductors to the absorbers; whereas when a failure of a source occurs, the resulting unbalanced mode will have its field extend to the absorbers to be damped without significantly affecting the output from the remaining operative sources.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1RAGHUVEER MALLAVARPU

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