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2007 European Conference on Wireless Technologies最新文献

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Design of a Transceiver RFIC for UWB Chaotic OOK System in 0.18um CMOS Technology 基于0.18um CMOS技术的UWB混沌OOK系统收发RFIC设计
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/emicc.2007.4412702
M. Jeong, Jeong-Ho Moon, C. Lee
{"title":"Design of a Transceiver RFIC for UWB Chaotic OOK System in 0.18um CMOS Technology","authors":"M. Jeong, Jeong-Ho Moon, C. Lee","doi":"10.1109/emicc.2007.4412702","DOIUrl":"https://doi.org/10.1109/emicc.2007.4412702","url":null,"abstract":"A transceiver RFIC for ultra wideband (UWB) chaotic on-off keying (OOK) system is designed and verified in 0.18 um CMOS technology. The transceiver RFIC is composed of a quasi-chaotic signal generator, an OOK modulator, a gain-controlled low noise amplifier (GC LNA), an envelop detector, and a baseband variable gain amplifier (VGA). The quasi-chaotic signal generator proposed in this paper is composed of a voltage control oscillator (VCO), a frequency divider, a PN-generator, and an up-conversion mixer. The chip size is 2.4 x 1.2 mm2. The current of the chip is 41 mA at transmit mode and 17 mA at receive mode with a supply voltage of 1.8 V. The result of the loop-back test shows that output signal level of the envelop detector is 200 mVp-p and invariant up-to 1 Mbps data rate.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124361115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linearity and Efficiency Optimisation in Microwave Power Amplifier Design 微波功率放大器设计中的线性度和效率优化
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/emicc.2007.4412704
P. Colantonio, F. Giannini, E. Limiti, A. Nanni, V. Camarchia, V. Teppati, M. Pirola
{"title":"Linearity and Efficiency Optimisation in Microwave Power Amplifier Design","authors":"P. Colantonio, F. Giannini, E. Limiti, A. Nanni, V. Camarchia, V. Teppati, M. Pirola","doi":"10.1109/emicc.2007.4412704","DOIUrl":"https://doi.org/10.1109/emicc.2007.4412704","url":null,"abstract":"In this contribution the minimisation of asymmetry between lower and upper side band intermodulation products will be discussed, starting from a Volterra analysis approach. Base-band and harmonic device terminations effects will be analysed, identifying novel conditions minimising IMD asymmetry and IM3 power levels. Such conditions, not relying on base-band terminations, are the basis for IM3 products minimisation via second harmonic load selection. The proposed criterion is then verified by harmonic load-pull measurements on a GaN HEMT under two-tone excitation. Measurements agree with the analysis, demonstrating a null IMD asymmetry and 6 dBc increase in C/I3, without affecting output power (34 dBm @ 1dB compression) and power added efficiency performance (65% @ 1 dB compression).","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130267985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
High-Efficiency Balanced Switched-Path Monolithic SiGe HBT Power Amplifiers for Wireless Applications 用于无线应用的高效平衡开关路径单片SiGe HBT功率放大器
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/eumc.2007.4405412
A. Grebennikov, B. Sogl, H. Herrmann, C. Rodi, W. Thomann
{"title":"High-Efficiency Balanced Switched-Path Monolithic SiGe HBT Power Amplifiers for Wireless Applications","authors":"A. Grebennikov, B. Sogl, H. Herrmann, C. Rodi, W. Thomann","doi":"10.1109/eumc.2007.4405412","DOIUrl":"https://doi.org/10.1109/eumc.2007.4405412","url":null,"abstract":"Modern wireless telecommunication systems require high-efficient, linear, low cost and long talk-time solutions. The proposed novel balanced circuit for power amplifiers provides a high efficiency at maximum as well as backoff output power levels and low sensitivity to load variations. To minimize the quiescent current at low output power levels, an adaptive current-mirror bias circuit can be effectively used. Experimental results for highly efficient, linear, multi-band and multi-mode, two-stage, balanced switched-path SiGe HBT power amplifiers, intended to operate across the DCS 1800, PCS 1900, WCDMA 850/1900/2100 frequency bands, exhibit a peak power-added efficiency of ges50 % at 33 dBm and ges20 % at 16 dBm of output power with a minimum quiescent current of 12 mA.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122104973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A High Linearity Mixed Signal Down Converter IC for C-band Radar Receivers 用于c波段雷达接收机的高线性混合信号下变频集成电路
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/ecwt.2007.4404015
H. Berg, H. Thiesies, M. Hertz, F. Norling
{"title":"A High Linearity Mixed Signal Down Converter IC for C-band Radar Receivers","authors":"H. Berg, H. Thiesies, M. Hertz, F. Norling","doi":"10.1109/ecwt.2007.4404015","DOIUrl":"https://doi.org/10.1109/ecwt.2007.4404015","url":null,"abstract":"A mixed signal receiver IC for C-band radars is presented. The design work has been focused on spectral purity and miniaturization. Miniaturization is achieved by minimizing peripheral components and control signals using internal calibration data and temperature compensation tables stored in RAM on-chip. This allows for the packaged chip to be used with a minimum of. The chip is manufactured by Austria Microsystems in their 0.35 mum SiGe-BiCMOS process and utilizes digital IP-block included in the design kit.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126289025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
High-efficiency GaN class-E power amplifier with ecompact harmonic-suppression network 具有紧凑谐波抑制网络的高效氮化镓e类功率放大器
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/eumc.2007.4405388
H. G. Bae, R. Negra, S. Boumaiza, F. Ghannouchi
{"title":"High-efficiency GaN class-E power amplifier with ecompact harmonic-suppression network","authors":"H. G. Bae, R. Negra, S. Boumaiza, F. Ghannouchi","doi":"10.1109/eumc.2007.4405388","DOIUrl":"https://doi.org/10.1109/eumc.2007.4405388","url":null,"abstract":"This paper presents a high efficiency class-E power amplifier (PA) suitable for wireless transmitters operating at 2 GHz. Compact impedance transformation network is designed, using micro-strip transmission lines, so that it simultaneously achieves fundamental load transformation and harmonic impedance control using only two open-circuit stubs (2fo, 3fo). The dimensions of the network's elements were determined in order to concurrently attain a high harmonic suppression, minimum loss and high power added efficiency. The measurement results of the PA prototype, which is designed using a 10 W gallium nitride (GaN) HEMT transistor, showed state-of-the-art drain and power added efficiency (PAE). The achieved PAE, power gain and output power, when the drain is biased at 50 V, were equal to 74%, 12.6 dB and 11.4 W respectively. In addition, a second and third harmonic suppression in excess of -40 dBc and -75 dBc, respectively, is achieved without extra circuit tuning or additional filtering.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131544219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Efficient, Compact, Wireless Battery Design 高效，紧凑，无线电池设计
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/ecwt.2007.4403989
J. Theeuwes, H. Visser, M. V. van Beurden, G.J.N. Doodeman
{"title":"Efficient, Compact, Wireless Battery Design","authors":"J. Theeuwes, H. Visser, M. V. van Beurden, G.J.N. Doodeman","doi":"10.1109/ecwt.2007.4403989","DOIUrl":"https://doi.org/10.1109/ecwt.2007.4403989","url":null,"abstract":"Wireless batteries or rectennas - rectifying antennas - are conceived for converting wireless RF power into DC power. Although power conversion efficiencies exceeding 80% have been reported for high (20 dBm) rectenna input power levels, wireless batteries will be most beneficial at large distances from sources that will radiate at power levels limited by national and international regulations. Therefore, the challenge is in maximizing the power conversion efficiency of wireless batteries for low input power levels, say 0dBm and below. By directly conjugate matching a rectifying circuit to a microstrip patch antenna, the need for a matching network between the two no longer exists. Thus the efficiency of the wireless battery will improve. Moreover, this matching technique automatically suppresses the reradiation of harmonics by the microstrip patch antenna since the harmonics will be mismatched. Thus, the impedance matching and filtering network encountered in traditional wireless battery designs has become obsolete. With the aid of analytical models developed for antenna and rectifier, single-layer, internally matched and filtered PCB rectennas have been designed for low input power levels. An efficiency of 52% for OdBm input power has been realized at 2.45 GHz for a wireless battery realized on FR4, showing an improvement -next to the size and complexity reduction -of more than 10% over a traditional rectenna design. A series connection of these wireless batteries is shown to be able to power a standard household wall clock.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126201836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots 带槽的单层多波段菱形MSA的辐射特性
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/eumc.2007.4405371
Y. Shinohe, R. Chayono, M. Haneishi, Y. Kimura
{"title":"Radiation Properties of Single-Layer Multiband Rhombic MSA with Slots","authors":"Y. Shinohe, R. Chayono, M. Haneishi, Y. Kimura","doi":"10.1109/eumc.2007.4405371","DOIUrl":"https://doi.org/10.1109/eumc.2007.4405371","url":null,"abstract":"This paper demonstrates a novel multiband rhombic microstrip antenna (MSA) with multiple slots printed on a single-layer PTFE substrate. The antenna is fed by a coplanar gap coupled with a V-shaped patch. Three inverted V-shaped slots are assumed on the rhombic patch and hence four resonant frequencies are obtained. Broadside radiation patterns and gain of over 5.0 dBi are also obtained. Experiments were carried out to verify the results estimated by IE3D simulator. Good agreements between simulated and measured results are confirmed. To further evaluate the performance, rhombic MSA with six inverted V-shaped slots is also investigated. Again, this antenna model accomplishes excellent multiband performances over the seven observed frequencies. Thus, the rhombic MSA with multiple slots is well suited as an alternative design for a multiband planar antenna.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128660459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A Novel L-Shaped RFID Tag Antenna 一种新型的l形RFID标签天线
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/eumc.2007.4405365
A. Rawa, N. Karmakar
{"title":"A Novel L-Shaped RFID Tag Antenna","authors":"A. Rawa, N. Karmakar","doi":"10.1109/eumc.2007.4405365","DOIUrl":"https://doi.org/10.1109/eumc.2007.4405365","url":null,"abstract":"A novel RFID tag antenna is designed and its performance is verified with both simulated and experimental results. One of the limitations of the conventional RFID system is its orientation, which poses a technical challenge to its performance. We propose a dual-planar L-shaped RFID microstrip patch antenna, which is formed by folding a flat uni-planar rectangular microstrip patch with a 90deg bend. The proposed design is tested and is seen to remove the orientation sensitivity of the RFID tag antenna, giving a 3-dB beamwidth of 150 deg. The proposed design is chosen so that the antenna may be placed along any of the vertical edges of a pallet/box and there is no radiation back into the pallet/box on which it is fixed.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123955651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
L-Shaped Monopole Array for Terrestrial Broadcasting Reception in the UHF Band 用于UHF波段地面广播接收的l形单极子阵列
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/eumc.2007.4405382
F. Kuroki, H. Ohta
{"title":"L-Shaped Monopole Array for Terrestrial Broadcasting Reception in the UHF Band","authors":"F. Kuroki, H. Ohta","doi":"10.1109/eumc.2007.4405382","DOIUrl":"https://doi.org/10.1109/eumc.2007.4405382","url":null,"abstract":"For the purpose of size-reduction, a printed L-shaped monopole array was developed for terrestrial broadcasting reception at UHF-band. This antenna consists of monopole array having L-shaped structure for downsizing, the length of each radiating element being set to be quarter a free-space wavelength in each UHF TV channel. The characteristics were analyzed and measured. According to the analytical results, the antenna gain was 0 dBi on average from 400 MHz to 700 MHz. The antenna was loaded in a handy-type mobile TV and the carrier noise ratios of analog terrestrial broadcasting channels were evaluated. It was confirmed that the proposed L-shaped monopole array is applicable to mobile and indoor terrestrial broadcasting TV antennas. The dimensions of this antenna are 80 mm in width, 50 mm in height, and 1.6 mm in thickness, sufficiently small to be used for such applications.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132031756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
2-GHz Band Cryogenically-Cooled GaN HEMT Amplifier for Mobile Base Station Receivers 用于移动基站接收机的2ghz频段低温冷却GaN HEMT放大器
2007 European Conference on Wireless Technologies Pub Date : 1900-01-01 DOI: 10.1109/ecwt.2007.4404031
S. Narahashi, Y. Suzuki, T. Nojima
{"title":"2-GHz Band Cryogenically-Cooled GaN HEMT Amplifier for Mobile Base Station Receivers","authors":"S. Narahashi, Y. Suzuki, T. Nojima","doi":"10.1109/ecwt.2007.4404031","DOIUrl":"https://doi.org/10.1109/ecwt.2007.4404031","url":null,"abstract":"This paper presents a 2-GHz band gallium nitride (GaN) high electron mobility transistor (HEMT) amplifier cryogenically cooled to 60 K as a part of the cryogenic receiver front-end (CRFE) for mobile base station receivers. The GaN HEMT amplifier attains the output power of 3 W and the maximum power added efficiency of 62% with a 50 V drain bias for class-AB operation. The results reported herein are the first on the performance of a cryogenically cooled GaN HEMT amplifier aiming at use in a 2-GHz band CRFE.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127590750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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