Programme for Research-Development-Innovation on Space Technology and Advanced Research – STAR

Design and technological experiments

The masks for the Schottky diode, the detector and the harmonic mixer were designed

The direct video type receiver with video detection (the detector) integrate hybrid or monolithic the antena and the Schottly diode. A W band detector (75 -110 GHz) was modelled and optimized for high rezistivity silicon substrate having 525 µm thick.

The layout of the detector

                                       (a)                                                        (b)
Simulated results for optimized antenna: (a) |S11| parameter; (b) 3D gain characteristics at 94 GHz

Microstrip structre of the harmonic mixer

The majority of the technological steps for manufacturing of the Schottky diodes were solved.

Optical images of the Schottly diode obtained after the the deposition of the polimer

First technological and characterizations experimens for the direct video type receiver (with commercial Schottky diode), for the membrane supported antennaes and for the detector realized in SIW technique, were performed/

Rejection parameter at the input port of the detector

A detector structure with zero bias diode on GaAs hybrid integrated


Estimated results

The Schottky diodes will be realized as individual chips. This will be one of the end products of the project. These diodes will be incorporated in (i) a direct video-type receiver structure where the Schottky diode will be monolithically integrated with a small broadband folded slot antenna, for testing purpose, or attached to any high-performance external antenna and (ii) in a mixer structure. Both the direct video type receiver (detector) as well as the mixer will operate in a frequency band close to 100 GHz. This is in accordance with ERC Report 25 which assigns certain frequency bands within 79-100 GHz frequency range for radio-astronomy and satellite communication applications. The receiver and the mixer will be the other end products of the project.

Work plan of the project

WP1 Design and modeling
Task T1.1: Specifications (IMT) M1-6
Task 1.2 Design of the Schottky diode (IMT) M 1-9
Task 1.3 Design and modelling of the direct video type receiver (IMT) M3-12
Task 1.4 Design of the harmonic mixer (IMT, RQ) M6-15

WP2 Technology development
Task 2.1 Development of GaAs based technology for the discrete Schttky diode (IMT) M 2-18
Task 2.2.  Technological process for integration of the antenna with the Schottky diode (IMT) M6-24
Task 2.3.  Technological process for integration of the harmonic mixer with the Schottky diode (IMT)  M 12-30

WP 3-Characterization
Task 3.1 Schottky diode individual chips characterization (IMT) M9-20
Task 3.2 Direct video type receiver characterization (IMT, RQ) M12-30
Task 3.3 Harmonic mixer characterization (IMT, RQ) M15-33

WP4 Demonstrators.
Task 4.1 Demonstrator of Schottky diode individual chips (IMT) M24-36
Task 4.2  Direct video type receiver (the detector) demonstrator (IMT) M24-36
Task 4.3 Harmonic mixer demonstrator (IMT, RQ) M24-36

WP5 Management and disseminations
Task 5.1: Project management (IMT) M 1-36
Task 5.2: Implementation of the web site (IMT) M 6-36
Task 5.3: Dissemination and exploitation of the results (IMT, RQ) M6-36