Patent US8810313B2 successfully refreshed from Google Patents.
US8810313B2
Active / In Force
US
⏱️ 3.6 years remaining
Multi-band power amplifier
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 2010-06-29
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Granted: 2014-08-19
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Expires: 2030-06-29
Abstract
Abstract A power amplifier ( 20 ) for operation in at least a first and a second frequency band, wherein a center frequency f 2 of the second frequency band is higher than a center frequency f 1 of the first frequency band, is disclosed. The power amplifier ( 20 ) comprises a transistor ( 35 ) for amplifying an input signal of the power amplifier ( 20 ) and an output coupling network ( 45 ) for connecting the power amplifier to a resistive load ( 55 ). The output coupling network ( 45 ) is operatively connected to an output terminal ( 40 ) of the transistor ( 35 ), has an output terminal ( 50 ) for connection to said resistive load ( 55 ), and is configured such that, when the power amplifier ( 20 ) is connected to said resistive load ( 55 ), the power amplifier ( 20 ) is arranged to operate in class F for frequencies in one of the first and the second frequency bands, and operate in inverse class F for frequencies in the other one of the first and the second frequency band. A related radio transmitter circuit ( 10 ) and a related radio-communication apparatus ( 1,2 ) are also disclosed.
Inventors
- 👤 Linsheng Liu
- 👤 Xiaochuan Jiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F1/00; H03F1/02; H03F1/0205; H03F1/0261; H03F1/0266; H03F3/189; H03F3/19; H03F3/193; H03F3/24; H03F3/245; H03F2200/00; H03F2200/15; H03F2200/204; H03F2200/423
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A power amplifier for operation in at least a first frequency band and a second frequency band, the power amplifier comprising: a transistor for amplifying an input signal of the power amplifier; and an output coupling network operatively connected to an output terminal of the transistor and having its own output terminal for connecting the power amplifier to a resistive load; wherein the output coupling network is configured such that, when the power amplifier is connected to the resistive load, the power amplifier is configured to: operate in class F for frequencies in one of the first frequency band and the second frequency band; and operate in inverse class F for frequencies in the other of the first frequency band and the second frequency band; wherein a center frequency f 2 of the second frequency band is higher than a center frequency f 1 of the first frequency band; and wherein a ratio between f 2 and f 1 is 1.5.
Claim 2
Dependent Claim
161 words
A power amplifier for operation in at least a first frequency band and a second frequency band, the power amplifier comprising: a transistor for amplifying an input signal of the power amplifier; and an output coupling network operatively connected to an output terminal of the transistor and having its own output terminal for connecting the power amplifier to a resistive load; wherein the output coupling network is configured such that, when the power amplifier is connected to the resistive load, the power amplifier is configured to: operate in class F for frequencies in one of the first frequency band and the second frequency band; and operate in inverse class F for frequencies in the other of the first frequency band and the second frequency band; wherein a center frequency f 2 of the second frequency band is higher than a center frequency f 1 of the first frequency band; and wherein a ratio between f 2 and f 1 is 1.5.
Claim 3
Dependent Claim
132 words
The power amplifier of claim 1 : wherein the power amplifier is configured for operation in class F for frequencies in the first frequency band and for operation in inverse class F for frequencies in the second frequency band; wherein, when the power amplifier is connected to the resistive load, the output coupling network is configured to: provide an essentially lossless electrical connection between the output terminal of the transistor and the resistive load at the frequencies f 1 and f 2 ; provide an open circuit between the output terminal of the transistor and the resistive load at the frequency 3*f 1 =2*f 2 ; and provide a short circuit between the output terminal of the transistor and a reference voltage node at the frequencies 2*f 1 and 3*f 2 .
Claim 4
Dependent Claim
186 words
The power amplifier of claim 2 , wherein the output coupling network comprises: a first parallel LC resonance circuit operatively connected between the output terminal of the transistor and the output terminal of the output coupling network, and configured to resonate at the frequency 3*f 1 =2*f 2 for providing the open circuit at 3*f 1 =2*f 2 ; and a branch operatively connected between the output terminal of the output coupling network and the reference voltage node, comprising: a second parallel LC resonance circuit; and a third parallel LC resonance circuit, connected in series with the second parallel LC resonance circuit; wherein the second parallel LC resonance circuit is configured to resonate at the frequency f 1 and the third parallel LC resonance circuit is configured to resonate at the frequency f 2 for providing the essentially lossless electrical connection between the output terminal of the transistor and the resistive load at frequencies f 1 and f 2 and for providing the short circuit between the output terminal of the transistor and the reference voltage node at the frequencies 2*f 1 and 3*f 2 .
Claim 5
Dependent Claim
56 words
The power amplifier of claim 2 , wherein the output coupling network comprises transmission lines configured to provide the essentially lossless electrical connection at the frequencies f 1 and f 2 , the open circuit at the frequency 3*f 1 =2*f 2 , and the short circuit at the frequencies 2*f 1 and 3*f 2 .
Claim 6
Dependent Claim
132 words
The power amplifier of claim 1 : wherein the power amplifier is configured for operation in inverse class F for frequencies in the first frequency band and for operation in class F for frequencies in the second frequency band; wherein, when the power amplifier is connected to the resistive load, the output coupling network is configured to: provide an essentially lossless electrical connection between the output terminal of the transistor and the resistive load at the frequencies f 1 and f 2 ; provide an open circuit between the output terminal of the transistor and the resistive load at the frequencies 2*f 1 and 3*f 2 ; and provide a short circuit between the output terminal of the transistor and a reference voltage node at the frequency 3*f 1 =2*f 2 .
Claim 7
Dependent Claim
172 words
The power amplifier of claim 5 , wherein the output coupling network comprises: a first series LC resonance circuit operatively connected between the output terminal of the transistor and a reference voltage node, and configured to resonate at the frequency 3*f 1 =2*f 2 for providing the short circuit at the frequency 3*f 1 =2*f 2 ; and a branch operatively connected between the output terminal of the transistor and the output terminal of the output coupling network, comprising: a second series LC resonance circuit configured to resonate at the frequency f 1 ; and a third series LC resonance circuit, connected in parallel with the second series LC resonance circuit configured to resonate at the frequency f 2 ; wherein the branch provides: essentially lossless electrical connection between the output terminal of the transistor and the resistive load at frequencies f 1 and f 2 ; and provides the open circuit between the output terminal of the transistor and the resistive load at the frequencies 2*f 1 and 3*f 2 .
Claim 8
Dependent Claim
56 words
The power amplifier of claim 4 , wherein the output coupling network comprises transmission lines configured to provide the essentially lossless electrical connection at the frequencies f 1 and f 2 , the open circuit at the frequencies 2*f 1 and 3*f 2 , and the short circuit at the frequency 3*f 1 =2*f 2 .
Claim 9
Dependent Claim
92 words
The power amplifier of claim 1 : wherein the power amplifier is further configured for operation in an additional third frequency band; wherein a center frequency f 3 of the third frequency band is higher than the center frequency f 2 of the second frequency band; and wherein the output coupling network is configured such that when the power amplifier is connected to the resistive load, the power amplifier is configured to operate in the same class for frequencies in the third frequency band as for frequencies in the first frequency band.
Claim 10
Dependent Claim
19 words
The power amplifier of claim 8 , wherein a ratio between f 3 and f 2 band is 1.5.
Claim 11
Dependent Claim
92 words
The power amplifier of claim 8 : wherein the power amplifier is further configured for operation in an additional fourth frequency band; wherein a center frequency f 4 of the fourth frequency band is higher than the center frequency f 3 of the third frequency band; and wherein the output coupling network is configured such that when the power amplifier is connected to the resistive load, the power amplifier is configured to operate in the same class for frequencies in the fourth frequency band as for frequencies in the second frequency band.
Claim 12
Dependent Claim
19 words
The power amplifier of claim 10 , wherein a ratio between f 4 and f 3 band is 1.5.
Claim 13
Dependent Claim
132 words
The power amplifier of claim 11 : wherein the power amplifier is configured for operation in class F for frequencies in the first frequency band and for operation in inverse class F for frequencies in the second frequency band; wherein, when the power amplifier is connected to the resistive load, the output coupling network is configured to: provide an essentially lossless electrical connection between the output terminal of the transistor and the resistive load at the frequencies f 3 and f 4 ; provide an open circuit between the output terminal of the transistor and the resistive load at the frequency 3*f 3 =2*f 4 ; and provide a short circuit between the output terminal of the transistor and a reference voltage node at the frequencies 2*f 3 and 3*f 4 .
Claim 14
Dependent Claim
132 words
The power amplifier of claim 11 : wherein the power amplifier is configured for operation in inverse class F for frequencies in the first frequency band and for operation in class F for frequencies in the second frequency band; wherein, when the power amplifier is connected to the resistive load, the output coupling network is configured to: provide an essentially lossless electrical connection between the output terminal of the transistor and the resistive load at the frequencies f 3 and f 4 ; provide an open circuit between the output terminal of the transistor and the resistive load at the frequencies 2*f 3 and 3*f 4 ; and provide a short circuit between the output terminal of the transistor and a reference voltage node at the frequency 3*f 3 =2*f 4 .
Claim 15
Dependent Claim
18 words
The power amplifier of claim 1 , wherein the power amplifier is included in a radio transmitter circuit.
Claim 16
Dependent Claim
17 words
The power amplifier of claim 1 , wherein the power amplifier is included in a mobile phone.
Claim 17
Dependent Claim
18 words
The power amplifier of claim 1 , wherein the power amplifier is included in a radio base station.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2017-08-18 | 2018-02-17 | 2018-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2021-08-18 | 2022-02-17 | 2022-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2025-08-18 | 2026-02-17 | 2026-08-19 | $7700.00 | Window Closed / Lapsed |