US4099228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic mixing with an anti-parallel diode pair
Assignee: Westinghouse Electric Corp
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Filing: 1976-08-30
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Granted: 1978-07-04
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Expires: 1996-08-30
Abstract
Abstract A harmonic mixer utilizing an anti-parallel configuration of two diodes which, when excited by a voltage waveform V LO sin ω LO t + V s sin ω s t where V LO is much greater than V s , yields a terminal current having angular frequency components m ω LO ± n ω s with the restriction that m + n is an odd integer. The diode configuration results in low conversion loss mixing when the local oscillator frequency is a subharmonic of the usually required local oscillator frequency, suppression of local oscillator noise sideband effects without the use of filters or hybrid junctions, and suppression of direct video detection.
Inventors
- 👤 Marvin Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
In a harmonic mixer for mixing two signals V LO sin ω LO t and V s sin ω s t, a microwave transmission line, a pair of anti-parallel diodes connected in shunt across elements of said transmission line, means for applying both of said signals to said line and means for deriving an output signal from said line, characterized in that said output signal has angular frequency components m ω LO ± n ω s where m + n is an odd integer.
Claim 2
Dependent Claim
84 words
In a harmonic mixer for mixing two signals V LO sin ω LO t and V s sin ω s t, a microwave transmission line, a pair of anti-parallel diodes connected in shunt across elements of said transmission line, means for applying both of said signals to said line and means for deriving an output signal from said line, characterized in that said output signal has angular frequency components m ω LO ± n ω s where m + n is an odd integer.
Claim 3
Dependent Claim
13 words
The harmonic mixer of claim 1 wherein said line is a slot line.
Claim 4
Dependent Claim
31 words
The harmonic mixer of claim 2 wherein the signals V LO sin ω LO t and V s sin ω s t are fed into one end of said slot line.
Claim 5
Dependent Claim
15 words
The harmonic mixer of claim 1 wherein said output signal appears across said anti-parallel diodes.
Claim 6
Dependent Claim
14 words
The harmonic mixer of claim 1 wherein said line is a microstrip transmission system.
Claim 7
Dependent Claim
86 words
In a harmonic mixer for mixing two signals V LO sin ω LO t and V s sin ω s t, a microwave transmission line, a pair of anti-parallel diodes connected in shunt across elements of said transmission line, means for applying both of said signals to said line and means for deriving an output signal from said line, characterized in that said output signal has angular frequency components m ω LO ± n ω s where m equals 2 and n is an odd integer.
Claim 8
Dependent Claim
86 words
In a harmonic mixer for mixing two signals V LO sin ω LO t and V s sin ω s t, a microwave transmission line, a pair of anti-parallel diodes connected in shunt across elements of said transmission line, means for applying both of said signals to said line and means for deriving an output signal from said line, characterized in that said output signal has angular frequency components m ω LO ± n ω s where m equals 2 and n is an odd integer.
Claim 9
Dependent Claim
12 words
The harmonic mixer of claim 6 wherein said integer n is 1.
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |