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This paper presents a 124 to 184 GHz single-ended amplifier designed in 28-nm FDSOI CMOS technology. The amplifier consists of four common-source gain stages and broadband matching networks for input, output and inter-stage matching employing slow-wave shielded co-planar waveguides. Having a total power consumption of 31 mW, the amplifier achieves a peak gain of 10.1 dB at 167 GHz and a 3-dB bandwidth...
In this paper, a proof-of-concept sub-THz detector for its use in radio telescopes is presented. The detector is intended to work at room-temperature and to be suitable for cosmic microwave background B-mode polarization measurements, so a high sensitivity photon-countig receiver is required. The proposed detector is a practical arrangement of several receivers, each one working on the principle of...
Ihis paper describes the design and development of a single-sideband receiver using semiconductor Schottky and MMIC technology operating at room temperature from 67 GHz to 116 GHz to meet the extended frequency range of ALMA Band 2&3 simultaneously. Special care has been taken to design a fundamental balanced mixer that is sensitive from cut-off frequency up to second propagation mode of the WR-10...
This paper reports on the activities carried out by Airbus DS SAS, OMMIC SAS and ACST GmbH during the ESA study “Micro and Millimetre-Wave Detectors” A081ET03. Two European technologies for direct detection have been developed and detectors have been designed, manufactured and characterized up to 166GHz, with performances comparable to non-European devices.
This paper presents the results from evaluation of suitable materials and ink properties for printing millimeter wave components. Dielectric parameters (relative permittivity and loss tangent) of various potential substrate materials are extracted from S-parameter measurements and simulations. Test samples have been printed over Polyethylene Terephthalate (PET) and Polyethylene Naphthalate (PEN) substrates...
In this paper we present imaging results obtained from frequency modulated continuous wave radar setup operated at 650 GHz and optimized for imaging of objects with lateral dimensions between 1–20 cm. We consider in particular the ability and the benefits of using such system for resolving features corresponding to depth variations smaller than the standard depth resolution of FMCW systems. This is...
Wave propagation in a dielectric rod waveguide loaded with a layer of silver nanowires was studied experimentally at millimeter wave frequencies. Then based on the measurement results, analytical calculations were used to estimate conductivity of the silver nanowire layer at millimeter wave frequencies. Numerical simulations based on the calculated conductivities were performed and good agreement...
The increase in applications with high data rates is leading to the development of point to point outdoor communication solutions with high bandwidths at high frequencies. This paper presents the design, manufacturing and radiation pattern test of a high gain parabolic reflector antenna at millimeter frequencies using typical machining techniques. The reflector antenna is focused on 330 GHz communication...
In 5G communication system a high gain steerable phased array is desired. In this paper, a novel mm-Wave 256 element phased array system based on 8 element sub-arrays is presented. The sub-arrays are randomly tiled so the periodicity in the array is disrupted and significantly reduce the side lobe level (SLL). Four different rectangular sub-arrays: 1×8, 8×1, 2×4 and 4×2 are used to completely fill...
We demonstrate a W-band bolometer based on a platinum nano-strip which is integrated with a waveguide probe on a polymer substrate. We measure a high thermal response of 49000 K/W thanks to the small size of the Pt resistor and the thermal properties of the polymer. Furthermore, its small thermal capacity allows to decrease the time constant to 2.2 ms. A good matching in the entire W-band is achieved...
A compact E-band (71–76 GHz) conductor-backed coplanar waveguide (CBCPW) to hollow metallic waveguide (WR-12) transition has been designed and fabricated. The fully-planar two-layer transition makes use of a double-slot antenna, which efficiently couples the millimeter-wave (mm-wave) signal from the CBCPW to the WR-12 waveguide. The introduced transition, together with an integrated high-speed balanced...
Array of field-effect transistors (FET) with asymmetric T-gates and floating electrodes fabricated on a single chip was used as terahertz (THz) detector. Nonresonant detection with strong photovoltaic response was realized due to excitation of electron plasma oscillations in the common channel of the FETs array. Voltage responsivities obtained by the array of FETs with floating electrodes surpass...
Presented is an 89 GHz waveguide coupled direct detector based on ACST low-barrier Schottky diodes. Signal-to-noise ratio (SNR) values above 35 dB within 6 dB input power dynamic are achieved with high voltage responsivity of 3000 V/W and significant white and 1/f noise reduction. The fabricated detector is characterized and compared to simulation results, proving a high accuracy level of the design...
This paper reports on the current ultra-low noise V-band down-converter development carried out by Airbus DS SAS for MetOp-SG mission. These equipment will be flying onboard MicroWave Sounder (MWS) and the MicroWave imager (MWI).
We present low-noise amplifiers (LNA) that have been developed in the framework of two pre-qualification ESA projects for frequencies between 54 and 229 GHz for the METOP-SG satellite program. The main goal of these satellites is to provide data for operational weather forecast and climate change. Specifically temperature and water vapor measurements can be only achieved by advancing the current state...
There is considerable interest in the development of composite materials used for reflectors within radio telescopes. To determine the surface reflectivity of composites at millimetre-wave frequencies, a measurement setup using a Fabry-Perot resonator has been developed at Q-Band (33–50 GHz). Fabry-Perot resonators are well known to give high-Q resonances and are suitable to measure low-loss materials...
This paper presents the characterization measurements and simulations performed with ACST InGaAs low-barrier Schottky diodes for millimeter wave mixing applications. While these low-barrier Schottky diodes have been successfully used for millimeter wave detector design, their performance when acting as mixers has not been tested yet. This paper shows the performance for this type of diodes in a fundamental...
In this paper, indications of charge trapping in THz Schottky diodes are investigated with various measurement techniques including current-voltage, capacitance and low-frequency noise measurements. GaAs diodes from various manufacturers are tested. For comparison purposes, results for two different diode samples are presented. Correlation between different measurement techniques is observed which...
Resonator techniques for precise measurements of gazes and condensed media in wide frequency range from 40 GHz up to 500 GHz and in the temperature interval from 4 K up to 900 K are presented. The measurement methods are the absolute ones and self “calibrated” it means that it is not necessary to use the prior information. Concrete values are calculated from the measured of the resonator frequency...
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