Unilateral frequency multiplier circuit

Gewartowski, J.W.

doi:10.1109/proc.1964.3495

Cited by 5 publications

(1 citation statement)

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“…The work presented here applies this architecture to implement an integrated frequency quadrupler with output frequency of 160 GHz using quasi-vertical GaAs varactors fabricated on thin silicon support membranes. The use of a balanced circuit architecture to realize "unilateral" multipliers that are insensitive to the loading effects of the output stages appears to have been first proposed by Gewartowski in 1964 [94] who later applied this approach to realize a quadrupler with 2.5 W of output power at 6 GHz [95]. The quadrupler presented here makes use of the same basic approach, but differs from that of Gewartowski as it uses a second-stage balanced doubler at the output to generate the fourth harmonic.…”

Section: Quasi-vertical Schottky Diode Multipliersmentioning

confidence: 99%

Submillimeter-Wave Quasi-Vertical GaAs Schottky Diodes Integrated on Silicon Membranes

Alijabbari¹

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GaAs Schottky diodes are the central component of Terahertz (THz) metrology instrumentation. The frequency translating property of the Schottky diode is used in ground and space based observatories and for characterization of other THz devices. As detectors, GaAs Schottky diodes are used for measuring signal power levels, as mixers they are used in heterodyne receivers, and as variable capacitors they are used in frequency multipliers.The focus of this dissertation is the integration of GaAs Schottky diodes on silicon-on-insulator (SOI) substrate carriers to better control the device parasitics and to accommodate assembly of fully integrated diode-based circuits. During research into this process, a unique quasi-vertical diode geometry was developed in which the ohmic contact lies directly below the Schottky anode. While similar in concept to the first whisker contacted Schottky diodes, the quasi-vertical diode is nevertheless a planar device that is readily integrated with other components supported by the SOI substrate, including beamleads for electrical connection. To illustrate the advantages of this technology, 40-to-80 GHz doublers and a new 40-to-160 GHz quadrupler were designed and implemented using the quasi-vertical diodes and heterogeneous integration methods developed in this research. These multipliers are the first demonstrated fully-integrated GaAs varactor circuits fabricated on SOI, yielding record performance in multiplication efficiency, and demonstrating the benefits of the novel diode architecture and substrate replacement technology.ii

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Section: Quasi-vertical Schottky Diode Multipliersmentioning

confidence: 99%

Submillimeter-Wave Quasi-Vertical GaAs Schottky Diodes Integrated on Silicon Membranes

Alijabbari¹

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A unilateral 6-GHz, 2 ½-watt varactor quadrupler

Brooks¹,

Gewartowski²

1967

1967 IEEE International Solid-State Circuits Conference. Digest of Technical Papers

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A Unilateral 6-GHz 2 1/2-Watt Varactor Quadrupler

Brooks¹,

Gewartowski²

1968

IEEE J. Solid-State Circuits

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Absfracf-A unilateral 1.5-to 6-GHz varactorquadruple has been developed. The multiplier delivers 2+ watts at 50-percent conversion efficiency and has a maximum inputVSWR of 1.6 for all conditions of load impedance. The quadruple efficiencyis diode limited, not circuit liiited, with only 0.5 dB of the 3.O-dB conversion loss due to circuit losses. The design uses a unilateral circuit concept for even-order harmonic generators to achieve the low sensitivity to output mismatch and a balanced diode pair hybrid circuit configuration to reduce chcuit complexity and circuitloss. Varactor multiplier stages are often cascaded using isolators to improve the stabiEty. The use of unilateralmultipliers eliminates the necessity for such isolators.

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Unilateral frequency multiplier circuit

Cited by 5 publications

References 0 publications

Submillimeter-Wave Quasi-Vertical GaAs Schottky Diodes Integrated on Silicon Membranes

Submillimeter-Wave Quasi-Vertical GaAs Schottky Diodes Integrated on Silicon Membranes

A unilateral 6-GHz, 2 ½-watt varactor quadrupler

A Unilateral 6-GHz 2 1/2-Watt Varactor Quadrupler

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