Engineering topics
Dengler, R.
Publications and source records attributed to Dengler, R..
Field of view calibration of a 114 to 660 GHz radiometer with a 1.6 meter aperture using near field techniques
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A large aperture 650 GHz near-field measurement system for the Earth Observing System Microwave Limb Sounder
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Improved 240 GHz Subharmonically Pumped Planar Schottky Diode Mixers for Space-Borne Applications
Low-noise broad IF band 240 GHz subharmonically pumped planar Schottky diode mixers for space-borne radiometers have been developed and characterized.
177-207 GHz Radiometer Front End: Single Sideband Measurements
This paper describes the MLS 177-207 GHz receiver front-end (RFE) and provides measured data for its lower and upper sidebands.
A Fully Automated High-Accuracy RF/IF Test System for Millimeter- and Submillimeter-wave Mixers
An automated RF/IF test system for complete, accurate measurement of millimeter and submillimeter-wave mixer performance is described.
An All Solid-State 640 GHz Subharmonic Mixer
This paper reports on the first all solid-state two-diode subharmonically pumped (SHP) mixer operating at 640 GHz.
A 640 GHz Planar-Diode Fundamental Mixer/Receiver
The design and performance of a 640 GHz solid-state receiver using a fundamental planar-Schottky-diode mixer, InP Gunn diode oscillator, whisker-contacted Schottky-varactor-diode sextupler and folded-Fabry-Perot diplexer are reported.
Planar Diode Solid State Receiver for 557 GHz with State-of-the-Art Performance
We report on a subharmonic mixer with a broad IF bandwidth that has been developed for the Microwave Instrument for the Rosetta Orbiter (MIRO) to study water transition lines occurring near 557 GHz.
Accelerated Lifetime Testing and Failure Analysis of Quartz Based GaAs Planar Schottky Diodes
Accelerated lifetime tests have been performed on intergrated planar GaAs Schottky diodes that were bonded to quartz substrates up-side-down with a heat-cured epoxy.
200 MGHz Waveguide Based Subharmonic Mixers with Planetary Schottky Diodes: Recent Progress
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Fabrication and Performance of Planar Schottky Diodes with T-gate-like Anodes in 200 GHz Subharmonically-Pumped Waveguide Mixers
A T-gate-like structure has been developed, fabricated and tested as the anode for millimeter and submillimeter-wave Schottky diodes. The low parasitics of the T-anode diodes yield extremely high cutoff frequencies, making the diodes useable at frequencies well beyond 1 THz. The diodes were tested as an antiparallel-pair, integrated monolithically with microstrip circuitry on a quartz substrate, in a subharmonically pumped waveguide mixer. A double sideband noise temperature of 600 K with a conversion loss of 4.7 dB were measured at 200 GHz. This is believed to be the lowest noise temperature ever reported for a room temperature subharmonically-pumped Schottky diode mixer at this frequency.
Planar GaAs Schottky Diodes Integrated with Quartz Substrate Circuitry for Waveguide Subharmonic Mixers at 215 GHz
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Frequency Tripler with Integrated Back-to-Back Barrier -N-N(sup +) (bbBNN) Varactor Diodes in a Novel Split-Waveguide Block at 220 GHz
A frequency tripler has been developed using an integrated planar back-to-back -n-n(sup +) varactor device in a waveguide mount at 220 GHz.