US7646248B2
Active / In Force
US
⏱️ 1.3 years remaining
Harmonic tuned doherty amplifier
Assignee: Intellectual Discovery Co Ltd
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Filing: 2008-02-20
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Granted: 2010-01-12
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Expires: 2028-02-20
Abstract
Abstract Disclosed is a Doherty amplifier including a carrier amplifier to perform a signal amplification operation regardless of a level of an input signal, a peaking amplifier to perform an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level, an output combination circuit to combine and output the outputs of the carrier amplifier and the peaking amplifier, and an input division circuit to divide an input signal into the carrier amplifier and the peaking amplifier, the Doherty amplifier including a carrier amplifier output harmonic impedance tuning network installed at a rear end of the carrier amplifier to tune an output harmonic impedance of the carrier amplifier, and a peaking amplifier output harmonic impedance tuning network installed at a rear end of the peaking amplifier to tune an output harmonic impedance of the peaking amplifier.
Inventors
- 👤 Youngoo Yang
- 👤 Xi Yao
- 👤 Hyun Chul Park
- 👤 Sung Wook Kwon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:58
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/04; H03F1/06; H03F1/07; H03F1/0205; H03F1/0288; H03F1/56; H03F3/00; H03F3/60; H03F3/602; H03F3/604; H03H; H03H7/00; H03H7/38; H03F2200/00; H03F2200/15; H03F2200/387; H03F2200/451
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
187 words
A Doherty amplifier which comprises: a carrier amplifier for always performing a signal amplification operation regardless of a level of an input signal; a peaking amplifier for performing an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level; an output combination circuit for combining and outputting outputs of the carrier amplifier and the peaking amplifier; and an input division circuit for dividing an input signal into the carrier amplifier and the peaking amplifier, wherein the Doherty amplifier includes a carrier amplifier output harmonic impedance tuning network which is installed at a rear end of the carrier amplifier so as to tune an output harmonic impedance of the carrier amplifier, wherein the carrier amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit and a third output harmonic impedance to a near short circuit, and a peaking amplifier output harmonic impedance tuning network which is installed at a rear end of the peaking amplifier so as to tune an output harmonic impedance of the peaking amplifier.
Claim 2
Dependent Claim
187 words
A Doherty amplifier which comprises: a carrier amplifier for always performing a signal amplification operation regardless of a level of an input signal; a peaking amplifier for performing an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level; an output combination circuit for combining and outputting outputs of the carrier amplifier and the peaking amplifier; and an input division circuit for dividing an input signal into the carrier amplifier and the peaking amplifier, wherein the Doherty amplifier includes a carrier amplifier output harmonic impedance tuning network which is installed at a rear end of the carrier amplifier so as to tune an output harmonic impedance of the carrier amplifier, wherein the carrier amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit and a third output harmonic impedance to a near short circuit, and a peaking amplifier output harmonic impedance tuning network which is installed at a rear end of the peaking amplifier so as to tune an output harmonic impedance of the peaking amplifier.
Claim 3
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 1 , wherein the peaking amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit.
Claim 4
Dependent Claim
36 words
The Doherty amplifier as claimed in claim 1 , wherein, on an output path of the peaking amplifier, a harmonic tuning network for tuning a third output harmonic impedance to a near short circuit is installed.
Claim 5
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 1 , wherein the peaking amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near short circuit.
Claim 6
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 1 , wherein the peaking amplifier output harmonic impedance tuning network tunes a third output harmonic impedance to a near open circuit.
Claim 7
Dependent Claim
222 words
A Doherty amplifier comprising: a carrier amplifier for always performing a signal amplification operation regardless of a level of an input signal; a peaking amplifier for performing an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level; an output combination circuit for combining and outputting outputs of the carrier amplifier and the peaking amplifier; and an input division circuit for dividing an input signal into the carrier amplifier and the peaking amplifier, wherein the Doherty amplifier includes a first input fundamental impedance matching network installed between the input division circuit and the carrier amplifier; a carrier amplifier output harmonic impedance tuning network which is installed between the carrier amplifier and the output combination circuit so as to tune an output harmonic impedance of the carrier amplifier, wherein the carrier amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit and a third output harmonic impedance to a near short circuit; a second input fundamental impedance matching network installed between the input division circuit and the peaking amplifier; and a peaking amplifier output harmonic impedance tuning network which is installed between the peaking amplifier and the output combination circuit so as to tune an output harmonic impedance of the peaking amplifier.
Claim 8
Dependent Claim
222 words
A Doherty amplifier comprising: a carrier amplifier for always performing a signal amplification operation regardless of a level of an input signal; a peaking amplifier for performing an amplification operation, starting from a high power output where a level of an input signal is equal to or greater than a predetermined level; an output combination circuit for combining and outputting outputs of the carrier amplifier and the peaking amplifier; and an input division circuit for dividing an input signal into the carrier amplifier and the peaking amplifier, wherein the Doherty amplifier includes a first input fundamental impedance matching network installed between the input division circuit and the carrier amplifier; a carrier amplifier output harmonic impedance tuning network which is installed between the carrier amplifier and the output combination circuit so as to tune an output harmonic impedance of the carrier amplifier, wherein the carrier amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit and a third output harmonic impedance to a near short circuit; a second input fundamental impedance matching network installed between the input division circuit and the peaking amplifier; and a peaking amplifier output harmonic impedance tuning network which is installed between the peaking amplifier and the output combination circuit so as to tune an output harmonic impedance of the peaking amplifier.
Claim 9
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 6 , wherein the peaking amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near open circuit.
Claim 10
Dependent Claim
36 words
The Doherty amplifier as claimed in claim 6 , wherein, on an output path of the peaking amplifier, a harmonic tuning network for tuning a third output harmonic impedance to a near short circuit is installed.
Claim 11
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 6 , wherein the peaking amplifier output harmonic impedance tuning network tunes a second output harmonic impedance to a near short circuit.
Claim 12
Dependent Claim
29 words
The Doherty amplifier as claimed in claim 6 , wherein the peaking amplifier output harmonic impedance tuning network tunes a third output harmonic impedance to a near open circuit.
Claim 13
Dependent Claim
32 words
The Doherty amplifier as claimed in claim 6 , further comprising a first output fundamental impedance matching network between the carrier amplifier output harmonic impedance tuning network and the output combination circuit.
Claim 14
Dependent Claim
32 words
The Doherty amplifier as claimed in claim 11 , further comprising a second output fundamental impedance matching network between the peaking amplifier output harmonic impedance tuning network and the output combination circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2013-01-11 | 2013-07-13 | 2014-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2017-01-11 | 2017-07-13 | 2018-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2021-01-11 | 2021-07-13 | 2022-01-12 | $7700.00 | Window Closed / Lapsed |