US4516271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave mixer with recovery of the sum frequency
Assignee: Alcatel Espace Industries SA
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Filing: 1983-08-11
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Granted: 1985-05-07
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Expires: 2003-08-11
Abstract
Abstract The mixer comprises a microelectronic circuit composed of one or a number of active electronic elements having a nonlinear characteristic and carried on a substrate, the elements being supplied by waveguide lines placed on the substrate. The microelectronic circuit is fixed within a closed casing and connected to terminals placed on the casing in order to mix an incident wave S having a frequency F S applied to a first terminal of the casing with a mixing wave OL having a frequency F L applied to a second terminal of the casing and in order to restitute a mixed wave OR having a frequency F O on a third terminal. The cavity formed by the internal space of the casing is tuned to a "sum" frequency representing the sum of the frequency of the mixing wave F L and of the frequency of the incident wave F S .
Inventors
- 👤 Pierre Fraise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0633; H03D9/0641; H03D7/00; H03D7/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A microwave mixer comprising: a microelectronic circuit having at least one electronic element with a nonlinear characteristic, a substrate for supporting said circuit, a plurality of striplines coupled to said at least one element supported by said substrate, a closed casing surrounding said circuit and forming an internal cavity thereby, said casing having thereon first, second and third terminals, said first terminal accepting an incident wave of frequency Fs, said second terminal accepting a mixing wave of frequency F L and said third terminal providing a mixed output wave having a frequency Fo, tuning means coupled to said casing to tune said internal cavity to a sum frequency Fs+F L representing the sum of the frequency of the mixing wave F L and of the frequency of the incident wave Fs.
Claim 2
Dependent Claim
131 words
A microwave mixer comprising: a microelectronic circuit having at least one electronic element with a nonlinear characteristic, a substrate for supporting said circuit, a plurality of striplines coupled to said at least one element supported by said substrate, a closed casing surrounding said circuit and forming an internal cavity thereby, said casing having thereon first, second and third terminals, said first terminal accepting an incident wave of frequency Fs, said second terminal accepting a mixing wave of frequency F L and said third terminal providing a mixed output wave having a frequency Fo, tuning means coupled to said casing to tune said internal cavity to a sum frequency Fs+F L representing the sum of the frequency of the mixing wave F L and of the frequency of the incident wave Fs.
Claim 3
Dependent Claim
27 words
A mixer according to claim 1, wherein the casing is closed by a cover, said tuning means including an element projecting through a face of said cover.
Claim 4
Dependent Claim
21 words
A mixer according to claim 2, wherein the height of the projecting element above the face of the cover is adjustable.
Claim 5
Dependent Claim
20 words
A mixer according to claim 3, wherein the projecting element consists of a screw which extends right through the cover.
Claim 6
Dependent Claim
29 words
A mixer according to claim 4, wherein the projecting element is located within a portion of the cavity at a sufficient distance from the striplines supported on the substrate.
Claim 7
Dependent Claim
14 words
A mixer according to claim 5, wherein the substrate has an approximately flat shape.
Claim 8
Dependent Claim
17 words
A mixer according to claim 6, wherein the cover is parallel to the approximately flat shaped substrate.
Claim 9
Dependent Claim
11 words
A mixer according to claim 7, wherein the cavity is parallelepipedal.
Claim 10
Dependent Claim
11 words
A mixer according to claim 7, wherein the cavity is cylindrical.
Claim 11
Dependent Claim
64 words
A mixer according to claim 1, wherein said mixer also comprises means supported by the substrate for recovering the image frequency F I which is equal to twice the frequency F L of the mixing wave minus by the frequency F S of the incident wave in order to reflect the image frequency from the at least one electronic element having a nonlinear characteristic.
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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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |