| 1. |
- Bao, M. Q., et al.
(författare)
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A 110-to-147 GHz Frequency Sixtupler in a 130 nm Sige Bicmos Technology
- 2018
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Ingår i: EuMIC 2018 - 2018 13th European Microwave Integrated Circuits Conference. ; , s. 105-108
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Konferensbidrag (refereegranskat)abstract
- The presented D-band sixtupler consists of a frequency tripler, a frequency doubler, as well as amplifiers. The optimum arrangement for those blocks is investigated. The analysis shows that the tripler should precede the doubler. Furthermore, to extend the bandwidth, an amplifier with an increasing gain versus frequency is applied, to compensate the gain decrease of the tripler. This wideband frequency sixtupler is designed and characterized in a 130 nm SiGe BiCMOS technology. This sixtupler has a bandwidth of 37 GHz (from 110 to 147 GHz), the maximum output power is 4.5 dBm, with a DC power consumption of 310 mW. The maximum power efficiency is 0.9%.
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| 2. |
- Thanh, Thi Ngoc Do, 1984, et al.
(författare)
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A low-phase noise D-band signal source based on 130 nm SiGe BiCMOS and 0.15 mu m AlGaN/GaN HEMT technologies
- 2019
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Ingår i: International Journal of Microwave and Wireless Technologies. - 1759-0787 .- 1759-0795. ; 11:5-6, s. 456-465
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Tidskriftsartikel (refereegranskat)abstract
- This paper reports on a record-low-phase noise D-band signal source with 5 dBm output power, and 1.3 GHz tuning range. The source is based on the unconventional combination of a fundamental frequency 23 GHz oscillator in 150 nm AlGaN/GaN HEMT technology followed by a 130 nm SiGe BiCMOS MMIC including a sixtupler and an amplifier. The amplifier operates in compression mode as power-limiting amplifier, to equalize the source output power so that it is nearly independent of the oscillator's gate and drain bias voltages used for tuning the frequency of the source. The choice of using a GaN HEMT oscillator is motivated by the need for a low oscillator noise floor, which recently has been demonstrated as a bottle-neck for data rates in wideband millimeter-wave communication systems. The phase noise performance of this signal source is -128 dBc/Hz at 10 MHz-offset. To the best of the authors' knowledge, this result is the lowest reported phase noise of D-band signal source.
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| 3. |
- Vassilev, Vessen, 1969, et al.
(författare)
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Spectrum Efficient D-band Communication Link for Real-time Multi-gigabit Wireless Transmission
- 2018
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Ingår i: IEEE MTT-S International Microwave Symposium Digest. - 0149-645X. - 9781538650677 ; , s. 1523-1526
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Konferensbidrag (refereegranskat)abstract
- This manuscript presents results of wireless real-time data transmission at 143 GHz. The transmitter/receiver (Tx/Rx) front-end circuitry is integrated on a single monolithic microwave integrated circuits (MMICs), realized in a 250-nm indium phosphide (InP) double heterojunction bipolar transistor (DHBT) technology. The Tx module shows gain of 12 dB at 143 GHz with output power of -2.3 dBm at 1 dB gain compression. The Rx module has a gain of 15 dB with noise figure (NF) of 13 dB at 143 GHz. The minimum NF of 10 dB is measured at 132 GHz. The Tx/Rx front-end modules were integrated in two radio units to demonstrate a real time wireless data transmission. At a distance of 10 m and using 40 dBi gain antennas, the highest data rate achieved was 5.3 Gbit/s using 64 QAM modulation over a 1 GHz channel with spectrum efficiency of 5bit/s/Hz.
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| 4. |
- Vosoogh, Abbas, 1984, et al.
(författare)
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A Cost-effective D-band Multi-layer Rectangular Waveguide Transmission Line Based on Glide-Symmetric EBG Structure
- 2018
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Ingår i: IET Conference Publications. - : Institution of Engineering and Technology. ; 2018:CP741
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Konferensbidrag (refereegranskat)abstract
- An air-filled multi-layer waveguide (MLW) transmission line with a novel architecture for high-frequency applications is presented. A rectangular waveguide transmission line is formed by stacking several thin metal layers without any electrical and galvanic contact requirement among the layers. A glide-symmetric electromagnetic band gap (EBG) structure is used to package the layers and eliminate any possible leakage. A back-to-back straight line with two right-angle bends is manufactured by use of chemical metal etching, a low-cost and high-precision fabrication technique. The fabricated prototype shows high performance with low measured transmission loss of 0.17 dB/cm at D-band (110 to 170 GHz). The proposed multilayer waveguide (MLW) has the great advantages of low-cost and easy fabrication with a low transmission loss, even for frequencies beyond 100 GHz. The proposed concept could be a good approach to design high-performance passive waveguide components, and also active and passive components integration in mass production at the millimeter wave frequency band.
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| 5. |
- Vosoogh, Abbas, 1984, et al.
(författare)
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An E-band Compact Frequency Division Duplex Radio Front-end Based on Gap Waveguide Technology
- 2019
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Ingår i: 13th European Conference on Antennas and Propagation, EuCAP 2019.
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Konferensbidrag (refereegranskat)abstract
- A compact module consisting of a novel integration of an antenna, a diplexer, and millimeter-wave active circuits for low latency wireless backhaul links working at E-band is presented in this paper. The proposed radio front-end module is built by four distinct layers which are vertically stacked with no electrical contact requirement between them based on gap waveguide technology. A 16×16 corporate-fed slot array antenna is successfully integrated× with a 5th order diplexer, as well as a transmitter (Tx) and a receiver (Rx) monolithic microwave integrated circuits (MMICs) in one package with a novel architecture and a compact form. The integrated radio front-end is able to simultaneously send and receive data by using a frequency division duplex (FDD) transmission scheme at 71-76 GHz and 81-86 GHz bands. A wireless data transmission is successfully demonstrated showing a data rate of 6 Gbit/s using 64 quadrature amplitude modulated (QAM) signal with a spectral efficiency of 4.4 bit/s/Hz. The proposed radio front-end provides the advantages of low loss, high efficiency, compact integration, and a simple mechanical assembly, which makes it a suitable solution for small cell backhaul links.
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| 6. |
- Vosoogh, Abbas, 1984, et al.
(författare)
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Compact Integrated Full-Duplex Gap Waveguide-Based Radio Front End For Multi-Gbit/s Point-to-Point Backhaul Links at E-Band
- 2019
-
Ingår i: IEEE Transactions on Microwave Theory and Techniques. - 0018-9480 .- 1557-9670. ; 67:9, s. 3783-3797
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents the design and realization of a high data rate radio front-end module for point-to-point backhaul links at E-band. The design module consists of four vertically stacked unconnected metal layers without any galvanic and electrical contact requirements among the building blocks, by using gap waveguide technology. The module components are a high-gain array antenna, diplexer, and circuitry consisting of a transmitter (Tx) and a receiver (Rx) monolithic microwave integrated circuits (MMICs) on a carrier board, which is successfully integrated into one package with a novel architecture and a compact form. The diplexer consists of two direct-coupled cavity bandpass filters with channels at 71-76 GHz and 81-86 GHz with a measured return loss of 15 dB and an isolation greater than 50 dB. A wideband 16 x 16 slot array antenna with a measured gain of more than 31 dBi is used to provide high directivity. The measured results show that the packaged transmitter provides a conversion gain of 22 and 20 dB at 76 and 86 GHz, respectively, with an output power of 14 and 16 dBm at 1-dB gain compression point, at the same frequencies. The packaged receiver shows an average conversion gain of 20 dB at 71-76-GHz and 24 dB at 81-86-GHz bands. A real-time wireless data transmission is successfully demonstrated with a data rate of 8 Gbit/s using 32-quadrature amplitude modulated signal over 1.8-GHz channel bandwidth with spectral efficiency of 4.44 bit/s/Hz. The proposed radio front end provides the advantages of low loss, high efficiency, compact integration, and a simple mechanical assembly, which makes it a suitable solution for small-cell backhaul links.
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| 7. |
- Vosoogh, Abbas, 1984, et al.
(författare)
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Novel air-filled waveguide transmission line based on multilayer thin metal plates
- 2019
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Ingår i: IEEE Transactions on Terahertz Science and Technology. - 2156-342X .- 2156-3446. ; 9:3, s. 282-290
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Tidskriftsartikel (refereegranskat)abstract
- © 2011-2012 IEEE. This paper presents a novel way of constructing waveguiding structures by stacking several thin metal plates for millimeter-wave and terahertz applications. The metallic layers do not require any electrical contacts among them. An air-filled multilayer waveguide (MLW) transmission line is successfully designed and manufactured at D-band. Five vertically stacked thin metal layers are used to form an air-filled rectangular waveguide line. The layers are simply assembled by allowing a small air gap among them, without the need of using advanced manufacturing methods such as adhesive bonding techniques. The possible field leakage due to the air gaps is prevented by using an electromagnetic bandgap structure, consisting of glide-symmetric holes. A straight MLW line and a line with double 90^\circ bends are fabricated by using chemical metal etching, as a proof of concept. The measurement results of the straight line show that the reflection coefficient is better than -8 dB with an average insertion loss of 0.02 dB/mm over the frequency band 110-170 GHz. For the double 90^\circ bend line, the reflection coefficient is better than -18 dB with a similar average insertion loss of 0.02 dB/mm over the frequency band 110-150 GHz. The proposed concept could be an excellent candidate for designing compact and thin passive waveguide components and active components packaging, with a great potential for low-cost, light weight, and mass producible at millimeter-wave frequencies.
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| 8. |
- An, Sining, 1991, et al.
(författare)
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A 40 Gbps DQPSK Modem for Millimeter-wave Communications
- 2016
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Ingår i: Asia-Pacific Microwave Conference Proceedings APMC 2015. ; 1
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Konferensbidrag (refereegranskat)abstract
- A high speed differential quadrature phase shift keying (DQPSK) modulator and demodulator (modem) is presented for data rates up to 40 Gbps, in which the modulator is based on an FPGA and the demodulator is based on analog components. The modem performance has been verified in a lab environment. The targeted application is wireless communications using millimeter-wave bands as a flexible alternative to optical fiber links in next generation mobile networks.
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| 9. |
- An, Sining, 1991, et al.
(författare)
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A Synchronous Baseband Receiver for High-Data-Rate Millimeter-Wave Communication Systems
- 2019
-
Ingår i: IEEE Microwave and Wireless Components Letters. - 1558-1764 .- 1531-1309. ; 29:6, s. 412-414
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Tidskriftsartikel (refereegranskat)abstract
- A novel synchronous baseband receiver is presented in this letter. With a pilot tone insertion at the transmitter, the proposed baseband receiver can perform carrier recovery (CR) regardless of modulation scheme and/or baud rate. The synchronous baseband receiver has an analog-digital hybrid structure, where a low-cost digital signal processor controls an analog local oscillator (LO) in frequency and phase to achieve CR. This structure requires only one low-cost analog-to-digital converter (ADC) with a sampling rate of 100 MS/s. A proof-of-concept demonstration at E-band achieves 9-Gb/s 64-quadratic-amplitude modulation (QAM) and 16-Gb/s QPSK transmissions.
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| 10. |
- An, Sining, 1991, et al.
(författare)
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An 8 Gbps E-band QAM Transmitter Using Symbol-based Outphasing Power Combining Technique
- 2017
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Ingår i: Radio-Frequency Integration Technology (RFIT2017). - 9781509040360 ; , s. 150-152
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Konferensbidrag (refereegranskat)abstract
- In millimeter-wave communication systems, generating high output power with high efficiency on the transmitter side is one major challenge. In this paper, a symbol-based outphasing power combining solution has been demonstrated with data rate up to 8 Gbps at an RF frequency of 83.5 GHz. This solution provides 2 dB higher output power compared to the power of two QAM signals at 12% EVM.
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