Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959594
N. Yang, K. Leung, Weiwei Li
A linearly polarized dielectric resonator (DR) antenna (DRA) with omnidirectional polarization diversity is presented in this paper. The dimensions of the DR should be chosen when the resonance frequencies of the TM01δand TE011+δmodes are the same. A circular patch with four short-circuited stubs are used to excite the TM mode without drilling any hole inside the DR. The TE mode is excited by four arc-shaped microstrip lines. A prototype was designed, fabricated, and measured. Good agreement can be observed between the simulated and measured results. The overlapping impedance bandwidth is measured as 8.1%. It should be mentioned that the proposed design is made of transparent glass, which could be easily integrated with optical applications.
{"title":"Linearly Polarized Omnidirectional Polarization-Diversity Dielectric Resonator Antenna","authors":"N. Yang, K. Leung, Weiwei Li","doi":"10.1109/CAMA47423.2019.8959594","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959594","url":null,"abstract":"A linearly polarized dielectric resonator (DR) antenna (DRA) with omnidirectional polarization diversity is presented in this paper. The dimensions of the DR should be chosen when the resonance frequencies of the TM01δand TE011+δmodes are the same. A circular patch with four short-circuited stubs are used to excite the TM mode without drilling any hole inside the DR. The TE mode is excited by four arc-shaped microstrip lines. A prototype was designed, fabricated, and measured. Good agreement can be observed between the simulated and measured results. The overlapping impedance bandwidth is measured as 8.1%. It should be mentioned that the proposed design is made of transparent glass, which could be easily integrated with optical applications.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127443563","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959664
Mohammed Farouk Nakmouche, H. Taher, D. Fawzy, A. Allam
In the current work, a new Wideband Substrate Integrated Waveguide Bandpass Filter (SIW-BPF) is presented. The target is to allow vertical roaming between the X and Ku band applications. As a first step, we performed a parametric study of different etched slot geometries namely, H-Slotted, T-Slotted, and U-Slotted DGS in order to examine the effects of altering different geometrical parameters of the unit on its response. H-Slotted DGS shows the highest FBW with 82.89% on the average compared to other geometries. As a second step, the cell size and the numbers of the H-Slotted DGS were optimized with the use of finite element method with the following constraints taken into consideration: low cost fabrication, high Q-Factor, compact size and easy integration. One of the designs was chosen for fabrication to validate the designed circuit. The measured results show that our optimized filter achieves an insertion loss of 2.01 dB at 8.5 GHz, a return loss higher than 11 dB and fractional bandwidth of 90.87% for a single cell and a fractional bandwidth of 80.05% for multiple cells. The measured results are in good agreement with the simulated results.
{"title":"Development of a Wideband Substrate Integrated Waveguide Bandpass Filter Using H-Slotted DGS","authors":"Mohammed Farouk Nakmouche, H. Taher, D. Fawzy, A. Allam","doi":"10.1109/CAMA47423.2019.8959664","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959664","url":null,"abstract":"In the current work, a new Wideband Substrate Integrated Waveguide Bandpass Filter (SIW-BPF) is presented. The target is to allow vertical roaming between the X and Ku band applications. As a first step, we performed a parametric study of different etched slot geometries namely, H-Slotted, T-Slotted, and U-Slotted DGS in order to examine the effects of altering different geometrical parameters of the unit on its response. H-Slotted DGS shows the highest FBW with 82.89% on the average compared to other geometries. As a second step, the cell size and the numbers of the H-Slotted DGS were optimized with the use of finite element method with the following constraints taken into consideration: low cost fabrication, high Q-Factor, compact size and easy integration. One of the designs was chosen for fabrication to validate the designed circuit. The measured results show that our optimized filter achieves an insertion loss of 2.01 dB at 8.5 GHz, a return loss higher than 11 dB and fractional bandwidth of 90.87% for a single cell and a fractional bandwidth of 80.05% for multiple cells. The measured results are in good agreement with the simulated results.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"59 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132054471","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959709
Hugo Girardon
Non-destructive testing is an essential tool to assess the safety of the facilities within nuclear plants. In particular, conductive deposits on U-tubes in steam generators constitute a major danger as they may block the cooling loop. To detect these deposits, eddy-current probes are introduced inside the U-tubes to generate currents and measuring back an impedance signal. Based on the work of [9], we develop a shape optimization technique with regularized gradient descent to invert these measurements and recover the deposit shape. To deal with the unknown, and possibly complex, topological nature of the latter, we propose to model it using a level set function as introduced in [8] and applied in [2] to shape optimization problems. The methodology is first validated on synthetic axisymmetric configurations and fast convergence is ensured by careful adaptation of the gradient steps and regularization parameters. Using the actual domain, from which the acquisitions are made, we then consider a more realistic modeling that incorporates the support plate and the presence of imperfections on the tube interior section. We employ in particular an asymptotic model to take into account these imperfections and treat them as additional unknowns in our inverse problem. A multi-objective optimization strategy, based on the use of different operating frequencies, is then developed to solve this problem. We shall present various numerical examples with synthetic data showing the viability of our approach.
{"title":"Shape Reconstruction of Deposits Inside a Steam Generator using Eddy Current Measurements","authors":"Hugo Girardon","doi":"10.1109/CAMA47423.2019.8959709","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959709","url":null,"abstract":"Non-destructive testing is an essential tool to assess the safety of the facilities within nuclear plants. In particular, conductive deposits on U-tubes in steam generators constitute a major danger as they may block the cooling loop. To detect these deposits, eddy-current probes are introduced inside the U-tubes to generate currents and measuring back an impedance signal. Based on the work of [9], we develop a shape optimization technique with regularized gradient descent to invert these measurements and recover the deposit shape. To deal with the unknown, and possibly complex, topological nature of the latter, we propose to model it using a level set function as introduced in [8] and applied in [2] to shape optimization problems. The methodology is first validated on synthetic axisymmetric configurations and fast convergence is ensured by careful adaptation of the gradient steps and regularization parameters. Using the actual domain, from which the acquisitions are made, we then consider a more realistic modeling that incorporates the support plate and the presence of imperfections on the tube interior section. We employ in particular an asymptotic model to take into account these imperfections and treat them as additional unknowns in our inverse problem. A multi-objective optimization strategy, based on the use of different operating frequencies, is then developed to solve this problem. We shall present various numerical examples with synthetic data showing the viability of our approach.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128770754","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959605
A. Firdausi, G. Hakim, Fery A. Kurniawan, Diah Septiyana, M. Alaydrus
Controlling the blood glucose levels are needed to be maintain, this was to ensure the health of human being. The problem to maintain the blood glucose levels is we need to know how much the glucose already in blood. Therefore an equipment to detect blood glucose levels is important. Right now on the market blood glucose levels detection equipment is using a needle to prick the finger to take amount of blood. This is very painful experience for a lot of people; therefore a new method is needed to detecting blood glucose levels without put needle in the finger. In this paper we propose a millimeter wave antenna microstrip for non-invasive blood glucose detection. We successfully detect 50mg/dl glucose-water solution using this new sensor.
{"title":"Development of a Microstrip Antenna for Glucose Detection at Millimeter Waves","authors":"A. Firdausi, G. Hakim, Fery A. Kurniawan, Diah Septiyana, M. Alaydrus","doi":"10.1109/CAMA47423.2019.8959605","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959605","url":null,"abstract":"Controlling the blood glucose levels are needed to be maintain, this was to ensure the health of human being. The problem to maintain the blood glucose levels is we need to know how much the glucose already in blood. Therefore an equipment to detect blood glucose levels is important. Right now on the market blood glucose levels detection equipment is using a needle to prick the finger to take amount of blood. This is very painful experience for a lot of people; therefore a new method is needed to detecting blood glucose levels without put needle in the finger. In this paper we propose a millimeter wave antenna microstrip for non-invasive blood glucose detection. We successfully detect 50mg/dl glucose-water solution using this new sensor.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"67 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130755277","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959630
Zhe Chen, H. Wong, Kaixu Wang, Jun Xiang
Two polarization-reconfigurable antennas realized by different liquid solutions are compared in this paper. In these two designs, liquid solutions of dielectric and metal materials were employed, respectively. However, the liquid solutions play different roles according to different design principles. In these two designs, both can reconfigure the polarization between ± 45° states. These two antennas will give full play to their brilliant abilities in wireless communication systems.
{"title":"Polarization-Reconfigurable Antennas with Different Liquid Solutions","authors":"Zhe Chen, H. Wong, Kaixu Wang, Jun Xiang","doi":"10.1109/CAMA47423.2019.8959630","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959630","url":null,"abstract":"Two polarization-reconfigurable antennas realized by different liquid solutions are compared in this paper. In these two designs, liquid solutions of dielectric and metal materials were employed, respectively. However, the liquid solutions play different roles according to different design principles. In these two designs, both can reconfigure the polarization between ± 45° states. These two antennas will give full play to their brilliant abilities in wireless communication systems.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"377 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124712416","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959724
K. H. Ha, Il Ho Jung, H. Kang, J. Lee, Yu Min Kim, C. Cho
In this paper, we design a Hybrid Supply Modulator (HSM) based on Non-Inverting Amplifier for High Power Amplifier (HPA) operating in C-band. Compared with the conventional HSM, the Switching stage and the R-sense stage are eliminated to prevent the power consumption, and the Non-Inverting Amplifier is applied to the linear stage. The proposed HSM consists of and Envelope Detector, Non-Inverting Amplifier and Push-Pull stage. By eliminating the Switching stage, the power consumed by the R-sense is prevented and the bias power consumption is reduced while maintaining the power modulation performance by applying the Non-Inverting Amplifier. The HSM achieved 45.9 dBm (39.8W) of output power and 93% efficiency at a supply voltage of 50V.
{"title":"Hybrid Supply Modulator for High Power RF PA with Non-Inverting Amplifier","authors":"K. H. Ha, Il Ho Jung, H. Kang, J. Lee, Yu Min Kim, C. Cho","doi":"10.1109/CAMA47423.2019.8959724","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959724","url":null,"abstract":"In this paper, we design a Hybrid Supply Modulator (HSM) based on Non-Inverting Amplifier for High Power Amplifier (HPA) operating in C-band. Compared with the conventional HSM, the Switching stage and the R-sense stage are eliminated to prevent the power consumption, and the Non-Inverting Amplifier is applied to the linear stage. The proposed HSM consists of and Envelope Detector, Non-Inverting Amplifier and Push-Pull stage. By eliminating the Switching stage, the power consumed by the R-sense is prevented and the bias power consumption is reduced while maintaining the power modulation performance by applying the Non-Inverting Amplifier. The HSM achieved 45.9 dBm (39.8W) of output power and 93% efficiency at a supply voltage of 50V.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128176209","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959692
F. Oktafiani, Effrina Yanti Hamid, A. Munir
The study on radiation characteristics of quad-ridged horn antenna (QRHA) by altering the ridge profile is presented. The evaluation of ridge profile is carried out based on the Gaussian function. The characterization is performed by varying variables in the function, namely gap between the ridge profiles, width of the horn aperture, length of the antenna horn, and maximum factor of the Gaussian function. The beamwidth and sidelobe level are the observed terms to represent the performance of proposed QRHA. It is found that the parameters significantly influence the performance of QRHA are width of the horn aperture and maximum of the Gaussian function. It can be inferred that the narrower antenna beamwidth is obtained in accordance with increasing both of parameters. While in term of sidelobe level, the optimum performances are achieved by reducing aperture of the horn and maximum of the Gaussian function.
{"title":"Study on Radiation Characteristics of QRHA Based on Gaussian Ridge Profile","authors":"F. Oktafiani, Effrina Yanti Hamid, A. Munir","doi":"10.1109/CAMA47423.2019.8959692","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959692","url":null,"abstract":"The study on radiation characteristics of quad-ridged horn antenna (QRHA) by altering the ridge profile is presented. The evaluation of ridge profile is carried out based on the Gaussian function. The characterization is performed by varying variables in the function, namely gap between the ridge profiles, width of the horn aperture, length of the antenna horn, and maximum factor of the Gaussian function. The beamwidth and sidelobe level are the observed terms to represent the performance of proposed QRHA. It is found that the parameters significantly influence the performance of QRHA are width of the horn aperture and maximum of the Gaussian function. It can be inferred that the narrower antenna beamwidth is obtained in accordance with increasing both of parameters. While in term of sidelobe level, the optimum performances are achieved by reducing aperture of the horn and maximum of the Gaussian function.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"112 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129090842","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959690
Jae-Yeong Lee, Dongkwon Choi, K. Kong, Junsik Yun, Youngno Youn, Wonpyo Kwon, W. Hong
This paper describes a methodology concerning design and measurement of millimeter-wave (mm-Wave) feeding networks including power divider to achieve high performance modules in RF high-power electronics. The design approach considering multi-port measurement within compact mm-Wave array elements is introduced and the precision design method including power divider without any power imbalance is discussed. Despite high dielectric loss tangent of FR-4 substrates, low loss feeding network can be achieved for both beam steering capability and high gain. Additionally, the design guidelines of power divider are investigated to suppress mutual coupling causing power imbalance between each port. As another alternative, the feeding network including power divider is proposed by the realization method of using back-to-back transition structures without mutual coupling issue.
{"title":"Design and Measurement Considerations of Feeding Network Including Power Divider for Multi-Port Antenna Arrays","authors":"Jae-Yeong Lee, Dongkwon Choi, K. Kong, Junsik Yun, Youngno Youn, Wonpyo Kwon, W. Hong","doi":"10.1109/CAMA47423.2019.8959690","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959690","url":null,"abstract":"This paper describes a methodology concerning design and measurement of millimeter-wave (mm-Wave) feeding networks including power divider to achieve high performance modules in RF high-power electronics. The design approach considering multi-port measurement within compact mm-Wave array elements is introduced and the precision design method including power divider without any power imbalance is discussed. Despite high dielectric loss tangent of FR-4 substrates, low loss feeding network can be achieved for both beam steering capability and high gain. Additionally, the design guidelines of power divider are investigated to suppress mutual coupling causing power imbalance between each port. As another alternative, the feeding network including power divider is proposed by the realization method of using back-to-back transition structures without mutual coupling issue.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115071138","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}
Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959785
Tjahjo Adiprabowo, Tse-Hsuan Wang, D. Lin
This radar is very useful for detecting the patient's vital signs, in this case the heartbeats rate and breathing rate, without using sensors that are attached to human skin. The topic presented in this paper is the use of a 77 GHz FMCW radar to do some simultaneous non-contact measurements of the vital signs of several people.
{"title":"77 GHz FMCW Radar based Simultaneous Vital Signs Measurements","authors":"Tjahjo Adiprabowo, Tse-Hsuan Wang, D. Lin","doi":"10.1109/CAMA47423.2019.8959785","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959785","url":null,"abstract":"This radar is very useful for detecting the patient's vital signs, in this case the heartbeats rate and breathing rate, without using sensors that are attached to human skin. The topic presented in this paper is the use of a 77 GHz FMCW radar to do some simultaneous non-contact measurements of the vital signs of several people.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115559289","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}
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