89 GHz zero‐bias Schottky detector for direct detection radiometry in European satellite programme MetOp‐SG

Abstract

An 89 GHz waveguide coupled direct detector based on a low-barrier Schottky diode is presented. The main focus is to reduce white and 1/f noise to achieve high signal-to-noise ratio values above 35 dB. The design also addresses the Schottky barrier height deviation over temperature and its compensation within the RF circuit. The fabricated detector is characterised and compared with simulation results, proving a high accuracy level of the design and fabrication process, as well as good knowledge of the applied Schottky diode. The results prove the suitability of the detector to be considered for the second European meteorological operational satellite programme (MetOp-SG).

A V‐band high dynamic range planar integrated power detector: Design and characterization process

“…[1][2][3][4][5] Recently, several implementations of millimeter-wave RF power detector circuits based on different technologies have been proposed in the literature. [6][7][8][9] However, most of them are paying more attention to design technology, and only little information about the characterization methodology has been revealed. In fact, at millimeter-wave frequency band, the characterization of RF power detectors is a very challenging task.…”

Performance evaluation of a lossy transmission lines based diode detector at cryogenic temperature

“…[10][11][12][13] In order to improve their sensitivity, these receivers are partially or fully cooled to cryogenic temperatures, and when a great level of integration in the system is required, such as in arrays of receivers, the diode detectors can be also working under cryogenic conditions. 14 The Schottky diode detectors are configured under different topologies, [15][16][17][18][19][20] but normally with reactive matching networks to compensate the impedance of the diodes over a wide frequency range. [15][16][17] Since the diode intrinsic sensitivity varies with frequency, good input matching and constant sensitivity over a wide frequency range are not achievable only with reactive matching networks.…”

“…14 The Schottky diode detectors are configured under different topologies, [15][16][17][18][19][20] but normally with reactive matching networks to compensate the impedance of the diodes over a wide frequency range. [15][16][17] Since the diode intrinsic sensitivity varies with frequency, good input matching and constant sensitivity over a wide frequency range are not achievable only with reactive matching networks. In this sense, the sensitivity flatness and the input return loss of the device are significant issues in this kind of receivers since the effective bandwidth is directly affected by the ripple in the responses.…”

Zero‐biased diode Schottky detector for low cost preamplified millimeter‐wave imaging

“…It provides sufficient spatial resolution and sensitivity in an acceptable image acquisition time in low contrast environment, like concealed weapon screening, all weather sensing, and so forth. Detector, working as an essential part of the imaging front module, necessitates the ability of high RF responsivity, high linearity, and low flicker noise for good imaging quantity in low contrast environment .…”