RF power combiner circuit with spaced capacitive stub
AssigneeSignal Technology Corporation
InventorsSteven Arlin, Thomas J. Casale
Life of this patent
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Abstract
An RF power combiner. A plurality of RF inputs connect to a power combiner switch assembly. RF switches connect each input to a common node. A single stub matching circuit connects between the common node and an output node such that an open-ended transmission line stub extends from the output node. An RF output connector feeds an RF output connection from the output node. The stub of the L-match circuit has fixed length or variable length configurations. As a consequence, the impedances at the common and output nodes are more closely matched.
Claims13
A power combiner having a plurality of RF input connections and an RF output connection and comprising:
- A) a switched RF feed line from each RF input connection to a common node, each said RF feed line including a transmission line extending from one RF input connection and an RF switch proximate said common node and connected between said transmission line and said common node, said transmission lines lying in a plane
- B) an RF output conductor having a first end connected to the RF output connection and a second end defining an output node that is spaced from said plane along an axis orthogonal to the plane, and
- C) an impedance matching network interconnecting said common and output nodes and including a delay line on the axis between the common and output nodes and a capacitive stub extending from said output node parallel to the plane.
A power combiner for producing at an RF output connection the sum of up to four RF inputs applied to RF input connections in response to remotely generated selection signals, said power combiner comprising:
- A) a common node,
- B) a transmission line and RF input switch in series between each RF input connection and said common node with said RF input switch being proximate said common node and said transmission lines lying in a plane,
- C) an output node spaced from said plane,
- D) an RF transmission line connecting said output node to the RF output connection, and
- E) a single stub matching circuit connected to said common and output nodes including a delay line extending between the common and output nodes along an axis orthogonal to said plane and a capacitive stub extending from the output node parallel to said plane thereby to establish an impedance transformation function between said common and output nodes.
Dependencies are inferred from the claim text.