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Patent 7934190 Click For Printable Version of This Patent
Patent Information:  USPTO Site Listing

Patent Number: 7934190
Case ID: 0
Patent Title: Multiple amplifier matching over lumped networks of arbitrary topology
Status: ACTIVE
Status Date: 11/30/2011 9:56:07 AM
Issue Date: 4/26/2011
Filed Date: 9/25/2008
Serial #: 2/238,353
Assignee Name: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Inventor(s): Allen, Jeffery C. , Schwartz, David F.
Lab Information:  View Lab Profile

Lab Name: SPAWAR Systems Center, Pacific
Location: 53560 Hull Street
San Diego, CA 92152-5001
Contact: Contact Lab About This Patent
   
Description:
BACKGROUND

The multiple amplifier matching problem involves placing one or more amplifiers into a lumped network to maximize the transducer power gain, minimize the noise figure, and maintain stability. An optimally designed lumped network permits the largest input signal to be stably transferred to the output.

Typically, amplifier matching is performed by the amplifier designer fixing a circuit topology, constraining the lumped element values, and undertaking a multi-objective optimization over the constrained element values. The difficulty with this approach is that there are many lumped network topologies, forcing the amplifier designer to undertake a massive search to determine an optimal lumped network topology.

A need exists for a method that can be used by amplifier designers to, given multiple amplifiers, determine an optimal lumped network topology that maximizes gain, minimizes noise, and maintains stability.

SUMMARY OF SOME EMBODIMENTS  . . . . More
Abstract:
A method includes generating at least one matrix representing a two-port, generating gain, noise, and stability functions of a system comprising the two-port, a generator connected to one port of the two-port, the generator having a generator reflectance, and a load connected to the other port of the two-port, the load having a load reflectance, and optimizing the gain, noise, and stability functions. The two-port comprises a non-reactive multi-port modeled by an orthogonal matrix, and at least one amplifier connected to the non-reactive multi-port. The orthogonal matrix is parameterized using an exponential map of skew-symmetric matrices having components restricted to an interval from -.pi. to .pi.. The gain, noise, and stability functions are generated using the generated matrix, the generator reflectance, and the load reflectance, The gain, noise, and stability functions are parameterized by the skew-symmetric matric . . . . More
Claims:
What is claimed is:

1. A non-transitory computer readable storage medium having a method encoded thereon, the method represented by computer readable programming code, the method comprising the steps of: generating at least one matrix representing a two-port, wherein the two-port comprises: a non-reactive multi-port modeled by an orthogonal matrix, wherein the orthogonal matrix is parameterized using an exponential map of skew-symmetric matrices having components restricted to an interval from -.pi. to .pi., and at least one amplifier connected to the non-reactive multi-port; generating gain, noise, and stability functions of a system, wherein the system comprises: the two-port, a generator connected to one port of the two-port, the generator having a generator reflectance, and a load connected to the other port of the two-port, the load having a load reflectance, wherein the gain, noise, and stability functions are generated using the generated matrix, the generator reflect . . . . More