| 1. |
- Alexander, Naomi E., et al.
(author)
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IMAGINE project : A low cost, high performance, monolithic passive mm-wave imager front-end
- 2012
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In: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. - 9780819492852
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Conference paper (peer-reviewed)abstract
- The FP7 Research for SME project IMAGINE - a low cost, high performance monolithic passive mm-wave imager front-end is described in this paper. The main innovation areas for the project are: i) the development of a 94 GHz radiometer chipset and matching circuits suitable for monolithic integration. The chipset consists of a W-band low noise amplifier, fabricated using the commercially available OMMIC D007IH GaAs mHEMT process, and a zero bias resonant interband tunneling diode, fabricated using a patented epi-layer structure that is lattice matched to the same D007IH process; ii) the development of a 94 GHz antenna adapted for low cost manufacturing methods with performance suitable for real-time imaging; iii) the development of a low cost liquid crystal polymer PCB build-up technology with performance suitable for the integration and assembly of a 94 GHz radiometer module; iv) the assembly of technology demonstrator modules. The results achieved in these areas are presented.
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| 2. |
- Alexander, Naomi E., et al.
(author)
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TeraSCREEN: Multi-frequency multi-mode Terahertz screening for border checks
- 2014
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In: Proc. SPIE 9078, Passive and Active Millimeter-Wave Imaging XVII. - : SPIE.
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Conference paper (other academic/artistic)abstract
- The challenge for any security screening system is to identify potentially harmful objects such as weapons and explosives concealed under clothing. Classical border and security checkpoints are no longer capable of fulfilling the demands of today’ s ever growing security requirements, especially with respect to the high throughput generally required which entails a high detection rate of threat material and a low false alarm rate. TeraSCREEN proposes to develop an innovative concept of multi-frequency multi-mode Terahertz and millimeter-wave detection with new automatic detection and classification functionalities. The system developed will demonstrate, at a live control point, the safe automatic detection and classification of objects concealed under clothing, whilst respecting privacy and increasing current throughput rates. This innovative screening system will combine multi-frequency, multi-mode images taken by passive and active subsystems which will scan the subjects and obtain complementary spatial and spectral information, thus allowing for automatic threat recognition. The TeraSCREEN project, which will run from 2013 to 2016, has received funding from the European Union’ s Seventh Framework Programme under the Security Call. This paper will describe the project objectives and approach.
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| 3. |
- D'Humières, Benoit, et al.
(author)
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The C3PO project : A laser communication system concept for small satellites
- 2017
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In: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 9781510606333
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Conference paper (peer-reviewed)abstract
- The satellite market is shifting towards smaller (micro and nanosatellites), lowered mass and increased performance platforms. Nanosatellites and picosatellites have been used for a number of new, innovative and unique payloads and missions. This trend requires new concepts for a reduced size, a better performance/weight ratio and a reduction of onboard power consumption. In this context, disruptive technologies, such as laser-optical communication systems, are opening new possibilities. This paper presents the C3PO1 system, "advanced Concept for laser uplink/ downlink CommuniCation with sPace Objects", and the first results of the development of its key technologies. This project targets the design of a communications system that uses a ground-based laser to illuminate a satellite, and a Modulating Retro-Reflector (MRR) to return a beam of light modulated by data to the ground. This enables a downlink, without a laser source on the satellite. This architecture suits well to small satellite applications so as high data rates are potentially provided with very low board mass. C3PO project aims to achieve data rates of 1Gbit/s between LEO satellites and Earth with a communication payload mass of less than 1kilogram. In this paper, results of the initial experiments and demonstration of the key technologies will be shown.
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| 4. |
- Pettersson, Lars, et al.
(author)
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Compact Integrated Slot Array Antennas for the 79 GHz Automotive Band
- 2010
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In: International Journal of Microwave and Wireless Technologies. ; 2:3-4, s. 305-316
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Journal article (peer-reviewed)abstract
- This paper presents two compact slot array antennas for the 79 GHz automotive band integrated into a 28 um thick benzocyclobutene (BCB) substrate attached to a 325 um thick 5 20 Omega cm bulk resistivity silicon wafer. The two antennas are a transmit (TX) 1x8 slot array antenna with a size of 1x23 mm and a receive (RX) M slot array antenna with a size of 15x23 mm. Promising performance has been measured with the TX and RX sub-array antennas (gain >4 dBi) with good matching to 50 11 (RL>10 dB) in the frequency range 70-90 GHz. By using a metal cavity, mounted on the back of the antenna, parallel plate modes could be reduced and the gain could also be increased by 2dB. The measured and the simulated results are consistent.
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| 5. |
- Platt, Duncan, et al.
(author)
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Broadband 65nm CMOS SOI LNA for a 100Gbit/s fiber-optic SCM transceiver
- 2012
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In: European Microwave Week 2012. - 9782874870286 ; , s. 16-19
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Conference paper (peer-reviewed)abstract
- The suitability of the ST Microelectronics 65nm CMOS LP SOI process on HR substrate for a 100Gbit/s fiber-optic SCM transceiver LNA is examined in this paper. A broadband single stage and three stage LNA, using requirements derived from system simulations, were designed with bandwidths from 2GHz to 40GHz and 2GHz to 26GHz at gains of 5dB and 15dB respectively. A noise figure of ∼5-7dB was obtained. Although the LNA noise figure is not as good, when compared to LNAs designed using other semiconductor technologies, it is still sufficient to be considered for the application, and has the advantage that it can be integrated with complex digital and analog baseband CMOS circuits.
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| 6. |
- Quintana, Crisanto, et al.
(author)
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A high speed retroreflective free space optics links with UAV
- 2021
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In: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 39:18, s. 5699-5705
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Journal article (peer-reviewed)abstract
- In this work we report the design and implementation of a very high speed retroreflective free space communication system between a ground station and a commercial unmanned aerial vehicle (UAV). The system uses a pixelated electro-absorption modulator (EAM) modulating retroreflector (MRR) to establish a data link operating at 500 Mbps at a range of 560 m and a bit error rate (BER) of 7.610-4. The MRR provides an effective aperture of 11mm and full field of view (FFOV) of 6.4. To the best of our knowledge, this is the fastest demonstration of an outdoor link of this type. In this paper the design and implementation of the system is described, as well as results from experimental trials.
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| 7. |
- Wang, Hui, et al.
(author)
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High sensitivity broadband 360GHz passive receiver for TeraSCREEN
- 2016
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In: Proceedings of SPIE. - : SPIE. - 9781510600713
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Conference paper (peer-reviewed)abstract
- TeraSCREEN is an EU FP7 Security project aimed at developing a combined active, with frequency channel centered at 360 GHz, and passive, with frequency channels centered at 94, 220 and 360 GHz, imaging system for border controls in airport and commercial ferry ports. The system will include automatic threat detection and classification and has been designed with a strong focus on the ethical, legal and practical aspects of operating in these environments and with the potential threats in mind. Furthermore, both the passive and active systems are based on array receivers with the active system consisting of a 16 element MIMO FMCW radar centered at 360 GHz with a bandwidth of 30 GHz utilizing a custom made direct digital synthesizer. The 16 element passive receiver system at 360 GHz uses commercial Gunn diode oscillators at 90 GHz followed by custom made 90 to 180 GHz frequency doublers supplying the local oscillator for 360 GHz sub-harmonic mixers. This paper describes the development of the passive antenna module, local oscillator chain, frequency mixers and detectors used in the passive receiver array of this system. The complete passive receiver chain is characterized in this paper.
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| 8. |
- Wang, Qin, et al.
(author)
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Recent developments in electroabsorption modulators at Acreo Swedish ICT
- 2015
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In: Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII. - : SPIE.
-
Conference paper (peer-reviewed)abstract
- Three types of electroabsorption modulators (EAMs) based on III-V semiconductor multiple quantum wells (MQW) are presented in this work. One is a novel monolithic integration traveling-wave EAM for an analog optical transmitter/transceiver to achieve integrated photonic mm-wave functions for broadband connectivity. Another one is composed of an integrated EAM 1D array in a photonic beam-former as a Ku-band phased array antenna for seamless aeronautical networking through integration of data links, radios, and antennas. The third one addresses the use of MQW EAMs in free space optical links through biological tissue for transcutaneous communication.
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| 9. |
- Wang, Xiaodong, et al.
(author)
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An all-printed wireless humidity sensor label
- 2012
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In: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 166-167, s. 556-561
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Journal article (peer-reviewed)abstract
- Printed electronics promise various kinds of sensor circuit labels, for applications in distributed sensing and monitoring, which can be manufactured using traditional printing tools at very low cost. Elevated humidity levels or water leakages cause tremendous costs in our society, such as in construction industries and in transportations. Distributed monitoring and remote sensing of the humidity level inside walls of buildings and packages is therefore desired and urgently needed. Here, we report a wireless humidity sensor label that is manufactured using screen-printing and dry-phase patterning. The sensor label includes a planar antenna, a tuning capacitor and a printed sensor-capacitor head. Through electromagnetic coupling between a reader and the printed sensor label, changes in humidity level were remotely detected and read-out as a shift of the resonant frequency. The manufacturing process of the humidity sensor label is fully compatible with inexpensive, reel-to-reel processing technologies, thus enabling low cost production.
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| 10. |
- Wang, Xiaodong, et al.
(author)
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Printed low loss capacitors for use in a wireless humidity sensor label
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Other publication (other academic/artistic)abstract
- A low loss printed capacitor is achieved by using a screen printable benzocyclobutene-based solution. The dissipation factor is measured to be 0.001 at frequencies around 3 MHz, which is low compared to commercially available dielectric inks with dissipation factors of ~0.05 in the same frequency region. By incorporating low loss printed capacitors with a planar antenna and a printed humidity sensor capacitor, a humidity sensor label which resonates at 3 MHz is demonstrated. The label is fully printed on a flexible substrate pre-patterned with the antenna and the manufacturing process is compatible with low-cost reelto-reel processing technology. The quality factor (Q factor) of the sensor label is enhanced up to about 15 in ambient environment. This allows readout of the sensor response at a distance and through damping materials such as walls in a building.
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