D. Smith, M. Elsdon, M. Leach, M. Fernando, S. Foti
{"title":"The use of indirect holographic techniques for microwave imaging","authors":"D. Smith, M. Elsdon, M. Leach, M. Fernando, S. Foti","doi":"10.1109/COMITE.2013.6545036","DOIUrl":"https://doi.org/10.1109/COMITE.2013.6545036","url":null,"abstract":"This work provides a brief outline of the basic theory of indirect microwave holography. This is supported by experimental work which illustrates how this technique can be used successfully in a number of areas including antenna measurements, concealed weapons detection and medical imaging.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"84 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123605252","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}
{"title":"Tunable compact filters based on stub-loaded parallelcoupled resonators","authors":"F. Burdin, E. Pistono, P. Ferrari","doi":"10.1109/MMW.2010.5605146","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605146","url":null,"abstract":"A novel topology of tunable compact band-pass filters based on stub-loaded parallel coupled resonators is demonstrated. These resonators behave like short-circuited quarter wavelength resonators, which explains the compactness of such a structure of filter. By loading the stubs by a tunable capacitance, a narrow-band tunable filter is obtained, with relative pass-band widths of 3.5 % with only two resonators. For a proof-of concept, three two-pole filters with different loading capacitors have been realized. The tunability reaches 6 %, i.e. twice the relative bandwidth. Insertion loss between 2.2 dB and 2.8 dB is achieved with a return loss better than −12 dB. The bandwidth is quite constant for all the working frequencies.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126054641","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}
{"title":"A small quarter wavelength microstrip antenna for HF and VHF band applications","authors":"H. Ryu, Gichul Jung, J. Woo","doi":"10.1109/MMW.2010.5605130","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605130","url":null,"abstract":"This paper presents a small quarter wavelength microstrip antenna for HF and VHF band applications. The designed antenna is based on a quarter wavelength microstrip antenna whose the patch size is the same as the ground plane. The antenna is miniaturized by inserting four zigzag plates at the end of the microtrip antenna. The size of the miniaturized antenna is 60 × 60 × 30 cm3 which is correspondent with electrical sizes kr of 0.61. The size reduction rate is 76.5%. The two omnidirectional radiation patterns are observed in the zy plane Eθ and the xy plane Eθ.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122112357","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}
M. Aznabet, M. Navarro, M. Beruete, F. Falcone, O. Mrabet, M. Essaaidi, M. Sorolla
{"title":"Slow light propagation in stacked complementary metasurfaces at microwave frequencies","authors":"M. Aznabet, M. Navarro, M. Beruete, F. Falcone, O. Mrabet, M. Essaaidi, M. Sorolla","doi":"10.1109/MMW.2010.5605123","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605123","url":null,"abstract":"The possibility to slow down the light is one of the hot topics of modern optics nowadays. This phenomenon holds great promise for m any applications in compact optical pr ocessing devices. Examples including ultracompact optical modulators and switches, enhanced optical nonlinearities, optical buffering and optical memory for quantum computers [1,2]. C onventional schemes to sl ow down the light have been acco mplished by using disordered media [1], electromagnetic induced transparency [3], Bose-Einstein condensates [4] and on the phenomenon of light interference in a sequence of coupled resonators [5].","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123608085","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}
{"title":"A compact and wide stop-band low-pass filter using a wire wound chip-inductor","authors":"Gi-Moon Lee, Wuseong Lee, Hachul Kim, H. Choi","doi":"10.1109/MMW.2010.5605203","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605203","url":null,"abstract":"In this paper, an elliptic-function low-pass filter using a wire wound chip inductor is proposed. To reduce the filter size and to realize the sharp roll-off skirt characteristic, the wire wound chip inductor, which has the large inductance with small size, is employed. The proposed low-pass filter has wide stop-band with three attenuation poles. The two of them are generated by the gap capacitance of the symmetrical open ended stubs, and the other is created by self resonant frequency of the wire wound chip inductor. The three attenuation poles are designed to suppress 2nd, 3rd, and 4th harmonics. The fabricated LPF exhibits 3-dB cutoff frequency of 930 MHz, insertion loss below 0.07 dB and stop-band from 1.48 to 9.10 GHz below the rejection level of 20 dB.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121675948","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}
{"title":"Design of a two layer aperture-coupled unequal power divider","authors":"O. Kilic, S. Demir","doi":"10.1109/MMW.2010.5605126","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605126","url":null,"abstract":"A four-port, aperture-coupled, unequal power divider is presented. The power ratio modification is fulfilled by the utilization of the defected ground structure (DGS). Effects of the changing defect length on the power distribution are presented. The power efficiency examination is also carried out. The simulation results show that at 10 GHz, the proposed device can supply varying port powers with a reflection loss better than 22 dB.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122267490","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}
{"title":"Probability of error performance of free space optical systems in severe atomspheric turbulence channels","authors":"H. Shaban, S. Aziz, M. Aly","doi":"10.1109/MMW.2010.5605154","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605154","url":null,"abstract":"Atmospheric turbulence causes degradation in the performance of the freespace optical (FSO) transmission. This turbulence is referred to as scintillation. To mitigate this effect, a multiple input multiple output (MIMO) system is employed. This paper investigates the use of multiple lasers and multiple aperture receivers in severe atmos pheric turbulence when binary pulse position modulation (BPPM)) is employed. First, single input multiple output(SIMO) system using BPPM technique is investigated with equal gain combining (EGC), selection combining (SC), and maximal ratio combining (MRC) diversity schemes. A closed form for the probability of error has been derived for both SC and MRC techniques, as well as Monte Carlo simulations. Then, a MI MO system for both zero forcing (ZF) equalizer and minimum mean square error (MMSE) equalizer is used. Finally, a comparison between different diversity techniques and linear equalizers is carried out.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127618326","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}
{"title":"Channel characterization of mobile radio channel over sea at 2 GHz","authors":"Kun Yang, T. Roste, F. Bekkadal, T. Ekman","doi":"10.1109/MMW.2010.5605153","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605153","url":null,"abstract":"Maritime communication has been considered as a core issues in the marine activities. However, few wideband wireless communication systems have been carefully evaluated for maritime applications due to a.o. insufficient knowledge of radio channel characteristics over sea. Therefore, a land-to-ship (L2S) radio channel measurement assignment has been performed in Trondheim, Norway. In this paper, we have focused on the open sea propagation environments and results of the channel characterization from measurements are presented, such as path-loss, channel correlation and reflections from the sea surface. We have compared the received signal level (RSL) with the Okumura-Hata model, the COST 231-Hata model and the ITU-R P.1546–2 model, and it has been found that the ITU-R model for open cold sea corresponding to field-strength value exceeded at 50% of the locations fits the measurement results best. By using two receiver antennas with 1.85 meters spacing, partly channel correlation has been revealed when the distance between the transmitter (TX) and receiver (RX) is within 2 km, while the two channels are found to be highly correlated when the boat is far away from the shore. Finally, reflections from the sea surface are found to be rather small over the open sea and the fading mainly due to sea reflections have been observed to be maximum 2 dB with a standard deviation of 0.5 dB. Closer to land this was different.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131310941","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}
C. Guclu, Ç. Çetintepe, O. Civi, S. Demir, T. Akin
{"title":"35 GHz phased array antenna using DMTL phase shifters","authors":"C. Guclu, Ç. Çetintepe, O. Civi, S. Demir, T. Akin","doi":"10.1109/MMW.2010.5605151","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605151","url":null,"abstract":"This paper presents the design of a monolithic phased array antenna with DMTL phase shifters on quartz substrate operating at 35 GHz. The design integrates DMTL phase shifters, rectangular slot antennas with the feed network comprising CPW lines, CPW T-junction and corners. On the four branches of the antenna, there are 5-bit phase shifters using 31 MEMS bridges, covering 360° with a resolution of 11.25°.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123646670","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}
{"title":"A simplified method for computation of scattered fields by the lamp-posts along a boulevard used for wireless communications in 2-GHz band","authors":"Hamed Sadeghi, F. Farzaneh","doi":"10.1109/MMW.2010.5605096","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605096","url":null,"abstract":"In this paper a simplified object specific ray tracing method is proposed to solve the important propagation problem of scattering by the lamp-posts. In fact, radiation from the transmitter antenna is modeled with a two ray incidence model and unknown currents on lamp-posts are computed using the Multi-Level Fast Multi-pole Method (MLFMM) which is an extension of the MoM (Method of Moments). In addition, scattering by lamp-posts is computed using the superposition of current elements electric fields based on the discrete complex image method (DCIM) in presence of a real ground with complex relative permittivity. The scattered near fields are considered instead of far fields. Based on this assumption, we use the generalized pencil-of-function (GPOF) method in DCIM. As another step in simplification, only single scattering is considered. Single scattering means that the scatterers are considered independently and their mutual effects are neglected. Another step is neglecting the scattered fields of the farther lamp-posts. To get closer to reality, lamp-post structure is considered with more details than the previous works. Although several simplifications are made and more details are added, it is shown that this method has adequate accuracy for propagation purposes. Significant gain in time and memory saving is achieved using above mentioned simplifications.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132874029","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}