US5543751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power combiner for use in a radio frequency system and a method of constructing a power combiner
Assignee: Google Technology Holdings LLC
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Filing: 1995-07-21
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Granted: 1996-08-06
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Expires: 2015-07-21
Abstract
Abstract A power combiner including a plurality of phasing transmission lines (122) supporting a set of amplifiers (104) coupled thereto, and a plurality of matching transmission lines (124). The set of amplifiers (104) having a selectable number of amplifiers between a minimum and a maximum value. Each of the matching transmission lines (124) is coupled to one of the phasing transmission lines (122) at one end and coupled to a common node (126) at the other end. Each of the matching transmission (124) lines has a substantially equivalent characteristic impedance determined according to a function of the minimum and the maximum number of amplifiers in the set of amplifiers (104).
Inventors
- 👤 Robert B. Stedman
- 👤 John E. Matz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:32
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0277; H03F3/00; H03F3/68; H03F3/60; H03F3/602
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
107 words
A power combiner for use in a radio frequency system comprising: a plurality of phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum; and a plurality of matching transmission lines, each of the matching transmission lines having a first and second end, said first end coupled to one of the phasing lines and said second end coupled to a common node and each matching transmission line having a substantially equivalent characteristic impedance determined according to a function of the minimum and the maximum selectable number of amplifiers in said set of amplifiers.
Claim 2
Dependent Claim
107 words
A power combiner for use in a radio frequency system comprising: a plurality of phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum; and a plurality of matching transmission lines, each of the matching transmission lines having a first and second end, said first end coupled to one of the phasing lines and said second end coupled to a common node and each matching transmission line having a substantially equivalent characteristic impedance determined according to a function of the minimum and the maximum selectable number of amplifiers in said set of amplifiers.
Claim 3
Dependent Claim
22 words
The power combiner of claim 1, wherein each of said phasing transmission lines has a length of a quarter of a wavelength.
Claim 4
Dependent Claim
19 words
The power combiner of claim 2, wherein said length comprises an odd multiple of a quarter of a wavelength.
Claim 5
Dependent Claim
30 words
The power combiner of claim 1, wherein said function comprises the fourth root of the product of the minimum number and the maximum selectable number of amplifiers in the set.
Claim 6
Dependent Claim
46 words
The power combiner of claim 1, wherein said combiner is configured as a combining power amplifier, said common node is coupled to a resistive output load, and said phasing transmission lines each have a characteristic impedance substantially equal to an impedance of the resistive output load.
Claim 7
Dependent Claim
17 words
The power combiner of claim 1, wherein said power amplifier is configured as a dividing power amplifier.
Claim 8
Dependent Claim
29 words
The power combiner of claim 1, wherein said minimum number is two, said maximum number is four, and said characteristic impedance is between about eighty to about ninety ohms.
Claim 9
Dependent Claim
25 words
The power combiner of claim 1, wherein said matching transmission lines each have a length which is a multiple of one fourth of a wavelength.
Claim 10
Dependent Claim
19 words
The power combiner of claim 8, wherein said length is an odd multiple of one fourth of a wavelength.
Claim 11
Independent Claim
123 words
A method of constructing a power combiner for use in a radio frequency system comprising the steps of: providing a plurality of parallel phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum; providing a plurality of matching transmission lines, each of the matching transmission lines having a first and second end, said first end coupled to one of the phasing lines and said second end coupled to a common node, and each of the matching transmission lines having a substantially equivalent characteristic impedance; and determining the characteristic impedance according to a nonlinear function of the minimum and the maximum selectable number of amplifiers in said set of amplifiers.
Claim 12
Independent Claim
123 words
A method of constructing a power combiner for use in a radio frequency system comprising the steps of: providing a plurality of parallel phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum; providing a plurality of matching transmission lines, each of the matching transmission lines having a first and second end, said first end coupled to one of the phasing lines and said second end coupled to a common node, and each of the matching transmission lines having a substantially equivalent characteristic impedance; and determining the characteristic impedance according to a nonlinear function of the minimum and the maximum selectable number of amplifiers in said set of amplifiers.
Claim 13
Dependent Claim
29 words
The method of claim 10, wherein said nonlinear function comprises a fourth root of the product of the minimum number and the maximum number of amplifiers in the set.
Claim 14
Dependent Claim
17 words
The method of claim 10, wherein said radio frequency system comprises an extended linear power amplifier system.
Claim 15
Dependent Claim
18 words
The method of claim 10, wherein said radio frequency system comprises a base site of a radiotelephone system.
Claim 16
Dependent Claim
99 words
A power combiner for use in a radio frequency system comprising: a plurality of parallel phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum value, each of said phasing transmission lines having a length substantially equal to one half of a wavelength or a multiple thereof; and a transforming line coupled to each of the phasing lines at one end and having a characteristic impedance determined according to a function of the minimum and the maximum number of amplifiers in said set of amplifiers.
Claim 17
Dependent Claim
99 words
A power combiner for use in a radio frequency system comprising: a plurality of parallel phasing transmission lines supporting a set of amplifiers coupled thereto, said set having a selectable number of amplifiers between a minimum and a maximum value, each of said phasing transmission lines having a length substantially equal to one half of a wavelength or a multiple thereof; and a transforming line coupled to each of the phasing lines at one end and having a characteristic impedance determined according to a function of the minimum and the maximum number of amplifiers in said set of amplifiers.
Claim 18
Dependent Claim
36 words
The power combiner of claim 14, wherein said transforming line is coupled to a resistive output load and said phasing transmission lines each have a characteristic impedance substantially equal to the impedance of the output load.
Claim 19
Dependent Claim
20 words
The power combiner of claim 14, wherein said length is substantially equal to a multiple of one half wave length.
Claim 20
Dependent Claim
33 words
The power combiner of claim 14, wherein said function comprises a reciprocal of the fourth root of the product of the minimum number and the maximum selectable number of amplifiers in the set.
Claim 21
Dependent Claim
19 words
The power combiner of claim 14, wherein the length of said transforming line is one quarter of a wavelength.
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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |