Patent US3711780A successfully refreshed from Google Patents.
US3711780A
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Nonreciprocal reactance amplifier arrangement
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1970-10-14
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Granted: 1973-01-16
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Expires: 1990-10-14
Abstract
Abstract A non-reciprocal reactance amplifier arrangement comprising the cascade connection of an up-converter or mixer and a downconverter or mixer whose reactance diodes are pumped in opposite phase by a common pump generator and are coupled together by a common auxiliary or idler circuit. The amplifier arrangement is provided with a broadband decoupling in the reverse direction and a simultaneous broadband transmission is the forward direction by designing the auxiliary circuit so that its transmission or band pass characteristic exhibits a supercritical course or wave form for the lower sideband and a subcritical course for the upper sideband.
Inventors
- 👤 R Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:55
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
In a nonreciprocal reactance Amplifier arrangement comprising in combination: a step-up mixer and a step-down mixer connected in a cascade arrangement, each of said mixers including a reactance diode, a common pump generator for supplying out of phase pump voltage signals to said mixers to pump the respective reactance diodes in different phases, an input circuit tuned to the frequency of the input signal connected to the input terminals of said cascade arrangement, an output circuit tuned to the frequency of the input signal connected to the output of said cascade arrangement, and a resonant auxiliary circuit common to both of said mixers for coupling said reactance diodes together; the improvement wherein the effective auxiliary circuit has a transmission characteristic which exhibits a supercritical behavior for the lower sideband frequency (p-s) and a subcritical behavior for the upper sideband frequency (p+s), where p equals the pump signal frequency and s equals the input signal frequency, whereby said amplifier arrangement exhibits broadband decoupling in the reverse direction with simultaneous broadband transmissions in the forward direction.
Claim 2
Dependent Claim
174 words
In a nonreciprocal reactance Amplifier arrangement comprising in combination: a step-up mixer and a step-down mixer connected in a cascade arrangement, each of said mixers including a reactance diode, a common pump generator for supplying out of phase pump voltage signals to said mixers to pump the respective reactance diodes in different phases, an input circuit tuned to the frequency of the input signal connected to the input terminals of said cascade arrangement, an output circuit tuned to the frequency of the input signal connected to the output of said cascade arrangement, and a resonant auxiliary circuit common to both of said mixers for coupling said reactance diodes together; the improvement wherein the effective auxiliary circuit has a transmission characteristic which exhibits a supercritical behavior for the lower sideband frequency (p-s) and a subcritical behavior for the upper sideband frequency (p+s), where p equals the pump signal frequency and s equals the input signal frequency, whereby said amplifier arrangement exhibits broadband decoupling in the reverse direction with simultaneous broadband transmissions in the forward direction.
Claim 3
Dependent Claim
57 words
The reactance amplifier arrangement as defined in claim 1 wherein said auxiliary circuit comprises a parallel resonant circuit connected in parallel with said mixers between the common junctions thereof, and wherein said auxiliary circuit is connected in parallel with a series circuit comprising said pump oscillator and a series resonant circuit tuned to the lower sideband frequency.
Claim 4
Dependent Claim
110 words
The reactance amplifier arrangement as defined in claim 1 wherein the two reactance diodes are substantially identical; wherein each of said signal input and output circuits includes a capacitance (Cs) connected across the input and output terminals, respectively, of said cascade arrangement and wherein said capacitances satisfy the following equation: where S(0) is the reciprocal base capacitance of the diode; Bp s is the bandwidth of the upper sideband; Bp s is the bandwidth of the lower sideband; a is the ratio of the conductances at the upper and the lower sidebands; RD is the loss resistance of the diode GD s/p+s gamma 2/2RD gamma control parameter of the diode.
Claim 5
Dependent Claim
34 words
The reactance amplifier arrangement as defined in claim 1 including a passive reciprocal two-terminal network connected between the input and output of said cascade arrangement for neutralizing the reactive admittance of said amplifier arrangement.
Claim 6
Dependent Claim
48 words
The reactance amplifier arrangement as defined in claim 2 wherein the parameters of the amplifier arrangement are dimensioned such that the neutralization of the reactive admittance thereof is effected by the finite susceptance of the said auxiliary circuit in conjunction with the parameters of the said reactance diodes.
Claim 7
Dependent Claim
82 words
The reactance amplifier arrangement as defined in claim 5 wherein the said reactance diodes are substantially identical, and wherein the following relationship exists between the frequencies of the pump signal and the input signal: where Cs is the capitance of the said tuned circuit across the terminals of said cascade arrangement; gamma is the control parameter of the reactance diodes; S(0) is the reciprocal value of the base capacitance of the reactance diode; RD is the loss resistance of the reactance diode.
Claim 8
Dependent Claim
43 words
The reactance amplifier arrangement as defined in claim 5 wherein said input and output circuits comprise symmetrically constructed resonant transmission line circuits whose length (1s) is equal to lambda p s/4, where lambda p s is the wavelength for the upper sideband frequency.
Claim 9
Dependent Claim
47 words
The reactance amplifier arrangement as defined in claim 7 wherein said auxiliary circuit consistS of two symmetrically constructed resonant transmission line circuits connected in parallel each of whose length (1h) is equal to lambda h/4, where lambda h is the wavelength of the auxiliary circuit oscillation frequency.
Claim 10
Dependent Claim
83 words
The reactance amplifier arrangement as defined in claim 8 wherein said two transmission line circuits forming said auxiliary circuit are coaxial and have a common inner conductor; wherein one end of each of the inner conductors of the resonant transmission line circuits forming said input and output circuits extends into said auxiliary circuit and is axially extended by the respective reactance diode of the associated mixer each said reactance diodes being in electrical contact with said common inner conductor of said auxiliary circuit.
Claim 11
Dependent Claim
109 words
The reactance amplifier arrangement as defined in claim 9 wherein said pump generator is coupled to said diodes via a coaxial line which extends into said auxiliary circuit and whose end is designed to form a resonant circuit which comprises a first transverse capacitance formed by a transverse mounting means for the inner conductor of said coaxial line, a second capacitance formed between the frontal face of the end of the inner conductor extending into said auxiliary circuit and the oppositely disposed surface of said inner conductor of said auxiliary circuit, and an inductance formed by the portion of the inner conductor between said mounting and said frontal face.
Claim 12
Dependent Claim
84 words
The reactance amplifier arrangement as defined in claim 10 wherein the inner conductor of the transmission line circuits forming said input and output circuits are coaxial and are positioned transverse to said inner conductor of said auxiliary circuit, and wherein said inner conductor of said coaxial line is positioned transverse to both the inner conductor of said auxiliary circuit and the inner conductors of said input and output circuits so that the axes of all of said inner conductors intersect in a common point.
References Cited (Backward Citations)
US3237017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |