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US 8,508,313 B1Granted
Multiconductor transmission line power combiner/divider
AssigneeComtech Xicom Technology Inc.
InventorDavid B Aster
Life of this patent
Estimating the term…
Abstract
Devices are described that combine or divide electromagnetic signal power using short-circuited parallel-coupled multiconductor transmission lines. Such devices include single-stage, multi-stage ‘traveling wave’, and multi-stage broadband filter structures. Electrically shorting each coupled conductor simultaneously provides thermal cooling from heat generated by RF dissipative loss. These features may provide a compact, thermally robust power combiner/divider covering 3:1 bandwidth or greater. The devices may be applicable to radar, electronic countermeasures (ECM), and communications transmitters.
Claims21
A single stage power combiner/divider comprising:
- a main conductor including a first terminal for electrical connection to a signal source and including a second terminal electrically connected to a short circuit;
- and
- a plurality of satellite conductors disposed spaced apart from and substantially parallel to the main conductor, each of the satellite conductors including a first terminal electrically connected to a short circuit and including a second terminal electrically connected to a respective termination admittance,
- wherein the first and second terminals of the main conductor each are thermally connected to the signal source and the short circuit, respectively,
- wherein the first and second terminals of the satellite conductors each are thermally connected to the short circuit and the respective termination admittance, respectively.
2 more elements
A single stage power combiner/divider comprising:
- a main conductor including a first terminal for electrical connection to a signal source and including a second terminal electrically connected to a short circuit;
- and
- a plurality of satellite conductors disposed spaced apart from and substantially parallel to the main conductor, each of the satellite conductors including a first terminal electrically connected to a short circuit and including a second terminal electrically connected to a respective termination admittance,
- wherein the main conductor is a center conductor, and the plurality of satellite conductors are arranged in a cross section symmetrically about the main conductor.
1 more element
A single stage power combiner/divider comprising:
- a main conductor including a first terminal for electrical connection to a signal source and including a second terminal electrically connected to a short circuit;
- and
- a plurality of satellite conductors disposed spaced apart from and substantially parallel to the main conductor, each of the satellite conductors including a first terminal electrically connected to a short circuit and including a second terminal electrically connected to a respective termination admittance,
- wherein a homogeneous multiconductor transmission line comprising the main conductor and the plurality of satellite conductors has an effective phase length that is about one-quarter of a wavelength at a mid-band operating frequency.
1 more element
A single stage power combiner/divider comprising:
- a main conductor including a first terminal for electrical connection to a signal source and including a second terminal electrically connected to a short circuit;
- and
- a plurality of satellite conductors disposed spaced apart from and substantially parallel to the main conductor, each of the satellite conductors including a first terminal electrically connected to a short circuit and including a second terminal electrically connected to a respective termination admittance,
- wherein the main conductor and the plurality of satellite conductors each have a thermal conduction path to the corresponding short circuit.
1 more element
A two-stage power combiner/divider comprising:
- a first power combiner/divider stage comprising:
- a first main conductor including a first terminal for electrical connection to a signal source and including a second terminal electrically connected in to a short circuit, and
- a plurality of first satellite conductors disposed spaced apart from and substantially parallel to the first main conductor, each of the first satellite conductors including a first terminal electrically connected in to a short circuit and including a second terminal;
- a plurality of transmission lines, each transmission line including a first terminal electrically connected to a respective second terminal of a first satellite conductor and including a second terminal;
- and
- a second stage comprising a plurality of power combiners/dividers, each power combiner/divider comprising:
- a second main conductor including a first terminal electrically connected to the second terminal of a corresponding transmission line and including a second terminal electrically connected to a short circuit, and
- a plurality of second satellite conductors disposed spaced apart from and substantially parallel to the second main conductor, each of the second satellite conductors including a first terminal electrically connected to a short circuit and including a second terminal electrically connected to a corresponding termination admittance.
5 more elements
Dependencies are inferred from the claim text.