# US 2014/0192926 A1 · Active General Purpose Hybrid

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- Number: US 2014/0192926 A1
- Document ID: US20140192926A1
- Status: Published application
- Kind: A1
- Application number: 14/176,092
- Filed: 2014-02-08
- Published: 2014-07-10
- Earliest claimed: 2011-11-29
- Assignees: ViaSat, Inc.
- Applicants: Viasat, Inc.
- Inventors: DAVID R. SAUNDERS; DAVID W. CORMAN; KENNETH V. BUER; DEAN L. COOK
- Web page: https://patentgrep.com/patent/US20140192926A1

## CPC

- H04L 27/365: {Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)}
- H04L 27/362: {Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated (H04L27/366 takes precedence)}
- H04B 7/0686: {Hybrid systems, i.e. switching and simultaneous transmission}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

A general purpose hybrid includes a first input port in communication with a first dual vector generator, a second input port in communication with a second dual vector generator, a first active combiner receives a first signal from the first dual vector generator and a third signal from the second dual vector generator, where the first and second dual vector generators independently apply phase shifting and amplitude control to the first and third signals; a second active combiner receives a second signal from the first dual vector generator and a fourth signal from the second dual vector generator, where the first and second dual vector generators independently apply phase shifting and amplitude control to the second and fourth signals; a first output port provides a first composite signal from the first active combiner; and a second output port provides a second composite signal from the second active combiner.

## Claims

### Claim 1

(canceled)

### Claim 2

A hybrid circuit comprising:
a first active circuit to divide a first input signal into a first pair of divided signals, and to independently adjust each of the first pair of divided signals to form a first pair of intermediate signals;
a second active circuit to divide a second input signal into a second pair of divided signals, and to independently adjust each of the second pair of divided signals to form a second pair of intermediate signals; and
a combiner circuit to combine one of the intermediate signals of the first pair and one of the intermediate signals of the second pair to form a first output signal, and to combine another of the intermediate signals of the first pair and another of the intermediate signals of the second pair to form a second output signal.

### Claim 3 (depends on 2)

The hybrid circuit of claim 2, wherein the first and second active circuits are responsive to commands to change adjustment of the first and second pairs of divided signals respectively.

### Claim 4 (depends on 1)

The hybrid circuit of claim 1, wherein the first and second active circuits adjust the first and second pairs of divided signals to compensate for signal path length differences associated with the first and second output signals.

### Claim 5 (depends on 1)

The hybrid circuit of claim 1, wherein:
the first active circuit adjusts at least one of phase and amplitude of each of the second pair of divided signals; and
the second active circuit adjusts at least one of phase and amplitude of each of the second pair of divided signals.

### Claim 6 (depends on 1)

The hybrid circuit of claim 1, wherein:
the first active circuit comprises a first plurality of vector generators to adjust the first pair of divided signals; and
the second active circuit comprises a second plurality of vector generators to adjust the second pair of divided signals.

### Claim 7 (depends on 6)

The hybrid circuit of claim 6, wherein a vector generator of the first plurality of vector generators comprises a first quadrant select in parallel with a second quadrant select, and a first variable gain amplifier in parallel with a second variable gain amplifier.

### Claim 8 (depends on 1)

The hybrid circuit of claim 1, wherein the first active circuit comprises:
an active splitter to divide the first input signal into the first pair of divided signals; and
a first vector generator and a second vector generator to independently adjust respective divided signals of the first pair of divided signals.

### Claim 9 (depends on 8)

The hybrid circuit of claim 8, wherein the first vector generator comprises:
a second active splitter to divide one of the first pair of divided signals into a pair of phase adjusted signals, and inject a 90 degree relative phase difference between the pair of phase adjusted signals;
a first variable gain amplifier to amplify one of the pair of phase adjusted signals;
a second variable gain amplifier to amplify another of the pair of phase adjusted signals; and
a combiner to combine the amplified pair of phase adjusted signals to form the one of the first pair of intermediate signals.

### Claim 10 (depends on 1)

The hybrid circuit of claim 1, wherein the first active circuit comprises:
a network of active splitters to divide the first input signal into the first pair of divided signals, inject a 90 degree relative phase difference between the first pair of divided signals, divide one of the first pair of divided signals into a third pair of divided signals, and divide another of the first pair of divided signals into a fourth pair of divided signals;
a plurality of variable gain amplifiers to amplify the third pair of divided signals to form a first pair of amplified signals, and to amplify the fourth pair of divided signals to form a second pair of amplified signals;
a first combiner to combine one of the first pair of amplified signals and one of the second pair of amplified signals to form the one of the first pair of intermediate signals; and
a second combiner to combine another of the first pair of amplified signals and another of the second pair of amplified signals to form the another of the first pair of intermediate signals.