US4283694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance-matching network realized in microstrip technique
Assignee: US Philips Corp
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Filing: 1979-07-09
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Granted: 1981-08-11
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Expires: 1999-07-09
Abstract
Abstract An impedance-matching microstrip network for matching a predetermined impedance to a lower impedance over a wide frequency band having a tapered line section for transposing the predetermined impedance to a higher impedance. At least one quarter wave line section is coupled to the narrow end of the tapered line section for transposing the higher impedance to the lower impedance.
Inventors
- 👤 Vlad Pauker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/142
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
An impedance-matching micro-strip network for matching a predetermined impedance to a lower impedance over a wide frequency band, comprising a tapered line section for transposing the predetermined impedance to a higher impedance and at least one quarter wave line section on the narrow end of said tapered line section for transposing this higher impedance to the lower impedance.
Claim 2
Dependent Claim
58 words
An impedance-matching micro-strip network for matching a predetermined impedance to a lower impedance over a wide frequency band, comprising a tapered line section for transposing the predetermined impedance to a higher impedance and at least one quarter wave line section on the narrow end of said tapered line section for transposing this higher impedance to the lower impedance.
Claim 3
Dependent Claim
57 words
An impedance-matching network as claimed in claim 1, wherein said at least one quarter wave line section comprises two series-arranged quarter wave line sections having mutually different characteristic impedance, the width of the quarter wave line sections having the lowest characteristic impedance being smaller than half the wavelength of the highest frequency of the said frequency band.
Claim 4
Dependent Claim
49 words
An impedance-matching network as claimed in claim 1, wherein said at least one quarter wave line section comprises two series-arranged quarter wave line sections having mutually different characteristic impedances, the characteristic impedance of the quarter wave line section having the highest characteristic impedance being greater than said higher impedance.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |