Numerical Analysis of Subharmonic Mixers Using Accurate and Approximate Models

Hicks, R.G.; Khan, P.J.

doi:10.1109/tmtt.1982.1131393

Cited by 18 publications

(3 citation statements)

References 21 publications

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“…However, for a single-diode mixer the fundamental response is typically better than that at the second LO harmonic. To improve second-harmonic response, two antiparallel connected identical diodes are pumped simultaneously by the LO voltage, generating current pulses at twice the LO frequency while suppressing odd harmonics of the LO frequency (Carlsson and Schneider 1978, Kerr 1979, Hicks and Kahn 1982. An advantage inherent in the two-diode arrangement is self-protection to large peak reverse voltage burnout.…”

Section: Heterodyne Detection Schemementioning

confidence: 99%

Heterodyne methods in millimetre wave plasma diagnostics with applications to ECE, interferometry and reflectometry

Hartfuss

Geist

Hirsch

1997

Plasma Phys. Control. Fusion

192

173

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Basic principles of heterodyne techniques are introduced and the various components of a heterodyne system are summarized. Special applications in ECE, interferometry and reflectometry are discussed after introducing the diagnostic principles. Realized systems as described in the literature are briefly outlined. Ordering principles are radiometer types in the case of ECE, mixing scheme and generation and stabilization of local oscillator and intermediate frequency signals in the case of interferometry and reflectometry. Special techniques and their impact on the performance of the diagnostic instruments are discussed. Contents Introduction 1694 Components of the heterodyne receiver 1695 2.1 Heterodyne detection scheme 1696 2.1.1 Mixers 1697 2.1.2 Local oscillators 1705 2.1.3 IF chain 1706 2.2 Sensitivity 1707 2.3 Antennas and waveguides 1709 Radiometry of electron cyclotron emission 1711 3.1 Principles of ECE diagnostics 1711 3.1.1 Frequency and intensity of the emission 1711 3.

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Section: Heterodyne Detection Schemementioning

confidence: 99%

Heterodyne methods in millimetre wave plasma diagnostics with applications to ECE, interferometry and reflectometry

Hartfuss

Geist

Hirsch

1997

Plasma Phys. Control. Fusion

192

173

View full text Add to dashboard Cite

show abstract

“…The diodes and associated circuit were assumed to be matched in this study. The effects of unmatched diodes or circuits were studied by Hicks and Khan [3]. They found that small mismatch in the diode capacitances and lead inductances could greatly degrade the mixer performance.…”

Section: Planar Doped Barrier Devices For Subharmonic Mixersmentioning

confidence: 99%

Planar doped barrier devices for subharmonic mixers

Lee

East

Haddad

1991

Micro & Optical Tech Letters

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Mixers are a critical component of most millimeter‐wave and terahertz systems. Often, the front‐end mixer performance determines the overall system performance. At higher millimeter‐wave and terahertz frequencies, mixer performance can be limited by the lack of low‐cost solid‐state sources. A subharmonic mixer with a pumping frequency at half the signal frequency would reduce the source power requirements at these higher frequencies. Typical subharmonic mixers use back‐to‐back Schottky barrier diodes. The resulting structures are difficult to fabricate. The performance can be degraded by unmatched diodes or by parasitics associated with the various connections. One possible solution is to use an integrated Schottky barrier structure. Another possible solution is to use a planar doped barrier (PDB) as a single‐device subharmonic mixer. This article presents an analysis of PDB subharmonic mixer performance.

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“…The two bypass capacitors in ("e") allow the anti-parallel mixer diodes to be separately biased for optimum conversion loss. The ability to separately bias each diode is important at millimeter wave frequencies as it allows a certain degree of compensation for differences in the electrical parameters of the two diodes [4]. Adjustable ground planes above the antenna and the 'RF Bandpass filter' may also be used to compensate for differences in the impedances of separate diode pairs when those differences are large.…”

Section: Brief Outline Of Research Findingsmentioning

confidence: 99%

Graduate Research Fellowships

Varaiya¹

1988

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Numerical Analysis of Subharmonic Mixers Using Accurate and Approximate Models

Cited by 18 publications

References 21 publications

Heterodyne methods in millimetre wave plasma diagnostics with applications to ECE, interferometry and reflectometry

Heterodyne methods in millimetre wave plasma diagnostics with applications to ECE, interferometry and reflectometry

Planar doped barrier devices for subharmonic mixers

Graduate Research Fellowships

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