Pub Date : 2016-12-01DOI: 10.1109/APMC.2016.7931330
A. Ghosh, M. Mandal, A. De, A. Chakrabarty, B. K. Sarkar
A high gain shared aperture dual-band dual-polarized (DBDP) patch antenna is proposed in this work. Dual polarization is obtained by exciting the antenna in two orthogonal directions using two separate ports. Higher order resonant mode is used to obtain higher gain. The antenna transmits and receives in L and S bands simultaneously with good isolation between the ports. Improved isolation is obtained by using an L-shaped slot and non-shorting pins on and below the radiating patch, respectively. A prototype element is fabricated. Isolation between the ports is 21 dB at 1.48 GHz and 39.25 dB at 2.59GHz. The measured gains in the broadside directions are 6.2 dB and 5.5 dB at the respective frequencies.
{"title":"Dual-band dual-polarized resonant patch antenna excited through isolated ports","authors":"A. Ghosh, M. Mandal, A. De, A. Chakrabarty, B. K. Sarkar","doi":"10.1109/APMC.2016.7931330","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931330","url":null,"abstract":"A high gain shared aperture dual-band dual-polarized (DBDP) patch antenna is proposed in this work. Dual polarization is obtained by exciting the antenna in two orthogonal directions using two separate ports. Higher order resonant mode is used to obtain higher gain. The antenna transmits and receives in L and S bands simultaneously with good isolation between the ports. Improved isolation is obtained by using an L-shaped slot and non-shorting pins on and below the radiating patch, respectively. A prototype element is fabricated. Isolation between the ports is 21 dB at 1.48 GHz and 39.25 dB at 2.59GHz. The measured gains in the broadside directions are 6.2 dB and 5.5 dB at the respective frequencies.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127624181","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931471
L. Malviya, R. K. Panigrahi, M. V. Kartikeyan
MIMO is the key to the wireless communication to solve the multipath propagation related issues for 4G technologies. A proximity coupled compact MIMO antenna is proposed for WLAN/WiMAX applications. The overall size of the proposed MIMO on the low cost FR-4 dielectric substrate is 39.63 × 82.15 mm2. The measured result shows more than 10 dB of in-band isolation, envelope correlation coefficient of 0.1, and gain of more than 2.75 dBi in the whole band.
{"title":"Proximity coupled MIMO antenna for WLAN/WiMAX applications","authors":"L. Malviya, R. K. Panigrahi, M. V. Kartikeyan","doi":"10.1109/APMC.2016.7931471","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931471","url":null,"abstract":"MIMO is the key to the wireless communication to solve the multipath propagation related issues for 4G technologies. A proximity coupled compact MIMO antenna is proposed for WLAN/WiMAX applications. The overall size of the proposed MIMO on the low cost FR-4 dielectric substrate is 39.63 × 82.15 mm2. The measured result shows more than 10 dB of in-band isolation, envelope correlation coefficient of 0.1, and gain of more than 2.75 dBi in the whole band.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126800235","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931457
Saptarshi Ghosh, K. V. Srivastava
In this paper, a low-profile tunable bandstop frequency selective surface (FSS) is presented for S-band applications. The FSS consists of square loops connected through varactor diodes across the diagonals. By controlling the reverse voltage of the varactors, the resonance frequency can be tuned for a wide frequency range. Full-wave simulation shows 21% tuning range from 2.31 GHz to 2.79 GHz with respect to lower resonance frequency. The novelty of the design lies in its four-fold symmetry, which makes the structure polarization-insensitive. The FSS is also angularly stable under oblique incidence for both TE and TM polarizations. Additionally, an equivalent circuit model has been introduced to explain the resonance mechanism of the proposed FSS. The structure is also fabricated and measured, where good agreement is observed between simulated and measured responses.
{"title":"A tunable bandstop frequency selective surface with polarization-insensitive characteristic","authors":"Saptarshi Ghosh, K. V. Srivastava","doi":"10.1109/APMC.2016.7931457","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931457","url":null,"abstract":"In this paper, a low-profile tunable bandstop frequency selective surface (FSS) is presented for S-band applications. The FSS consists of square loops connected through varactor diodes across the diagonals. By controlling the reverse voltage of the varactors, the resonance frequency can be tuned for a wide frequency range. Full-wave simulation shows 21% tuning range from 2.31 GHz to 2.79 GHz with respect to lower resonance frequency. The novelty of the design lies in its four-fold symmetry, which makes the structure polarization-insensitive. The FSS is also angularly stable under oblique incidence for both TE and TM polarizations. Additionally, an equivalent circuit model has been introduced to explain the resonance mechanism of the proposed FSS. The structure is also fabricated and measured, where good agreement is observed between simulated and measured responses.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126830586","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931436
Gaurangi Gupta, A. Harish
A dipole antenna placed close to a high impedance surface (HIS) has been analyzed as a coupled resonator circuit. The coupling between dipole and HIS has been studied to deduce the necessary conditions for designing and placing the antenna. It has been found that the dipole resonant frequency is not limited to ±90° reflection phase range of HIS. A dipole ranging from 0.7 GHz to 1.55 GHz can couple efficiently with the HIS with operating frequency of 0.875 GHz for a wide impedance bandwidth.
{"title":"Coupling analysis of dipole antenna over high impedance surface","authors":"Gaurangi Gupta, A. Harish","doi":"10.1109/APMC.2016.7931436","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931436","url":null,"abstract":"A dipole antenna placed close to a high impedance surface (HIS) has been analyzed as a coupled resonator circuit. The coupling between dipole and HIS has been studied to deduce the necessary conditions for designing and placing the antenna. It has been found that the dipole resonant frequency is not limited to ±90° reflection phase range of HIS. A dipole ranging from 0.7 GHz to 1.55 GHz can couple efficiently with the HIS with operating frequency of 0.875 GHz for a wide impedance bandwidth.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131445221","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931311
Deepansh Sharma, N. Khare, S. Koul, M. Abegaonkar
This paper present synthesis and fabrication of zinc doped cobalt ferrite thin film (ZCFO), spur-line based microwave notch filter and tuning of this microwave filter in the presence of magnetic bias field. The centre frequency of the fabricated notch filter was 12.77 GHz and 5.4 % tuning is achieved by varying the magnetic field from 0 to 36 kA/m. This tuning is based on the change in the permeability value of the ferrite thin film, and the experimental results are confirmed by a commercially available software tool. The complete geometry is used in the flip-chip mode.
{"title":"Magnetic tuning of partially magnetized ferrite based microwave notch filter","authors":"Deepansh Sharma, N. Khare, S. Koul, M. Abegaonkar","doi":"10.1109/APMC.2016.7931311","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931311","url":null,"abstract":"This paper present synthesis and fabrication of zinc doped cobalt ferrite thin film (ZCFO), spur-line based microwave notch filter and tuning of this microwave filter in the presence of magnetic bias field. The centre frequency of the fabricated notch filter was 12.77 GHz and 5.4 % tuning is achieved by varying the magnetic field from 0 to 36 kA/m. This tuning is based on the change in the permeability value of the ferrite thin film, and the experimental results are confirmed by a commercially available software tool. The complete geometry is used in the flip-chip mode.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132814572","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931395
Ajay K. Gupta, D. Lingaiah, P. Som
Error Vector Magnitude (EVM), used extensively to test a communication system's quality, is calculated by comparing the corrupt received signal (sent by the transmitter) with a clean reference signal (regenerated at the receiver). This paper provides a lower limit for EVM for a given experimental set-up and also ways to achieve that limit under certain conditions. This paper presents two different experimental communication set-ups to showcase the limit in each case and methods to achieve those limits. This makes it possible to determine not only whether a communication system or its component will work properly in the real world but also how good its quality is relative to the best achievable quality. The theory and experiments in this paper also provide a mechanism to isolate which aspect(s) to focus efforts on to improve the quality of transmitters or receivers or their components during design and manufacture.
{"title":"Generating and achieving Error Vector Magnitude limits while testing communication systems or their components","authors":"Ajay K. Gupta, D. Lingaiah, P. Som","doi":"10.1109/APMC.2016.7931395","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931395","url":null,"abstract":"Error Vector Magnitude (EVM), used extensively to test a communication system's quality, is calculated by comparing the corrupt received signal (sent by the transmitter) with a clean reference signal (regenerated at the receiver). This paper provides a lower limit for EVM for a given experimental set-up and also ways to achieve that limit under certain conditions. This paper presents two different experimental communication set-ups to showcase the limit in each case and methods to achieve those limits. This makes it possible to determine not only whether a communication system or its component will work properly in the real world but also how good its quality is relative to the best achievable quality. The theory and experiments in this paper also provide a mechanism to isolate which aspect(s) to focus efforts on to improve the quality of transmitters or receivers or their components during design and manufacture.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131454602","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931333
Kirti Dhwaj, Shihan Qin, L. J. Jiang, T. Itoh
A methodology to control the frequency transmission zeroes (FTZs) of a dual-mode resonator based elliptic-response filter is presented. Varactor loaded feeding structures are introduced for exciting a stub-perturbed ring-resonator to control the external quality factors associated with even and odd modes of the resonator. The technique allows for control of FTZs on either sides of the passband without any significant change in the bandwidth or operating frequency of the filter. Because of the high-Q nature of ring resonator, assymetric frequency responses are achieved with an in-band insertion loss <2.9 dB and out-of-band suppression >55 db at 190 MHz from the center-frequency of 2.2 GHz. Additionally, the filter is provided with tunable source-load coupling to isolate the movement of two FTZs.
{"title":"Tunable transmission zeroes bandpass filter with external quality factor control","authors":"Kirti Dhwaj, Shihan Qin, L. J. Jiang, T. Itoh","doi":"10.1109/APMC.2016.7931333","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931333","url":null,"abstract":"A methodology to control the frequency transmission zeroes (FTZs) of a dual-mode resonator based elliptic-response filter is presented. Varactor loaded feeding structures are introduced for exciting a stub-perturbed ring-resonator to control the external quality factors associated with even and odd modes of the resonator. The technique allows for control of FTZs on either sides of the passband without any significant change in the bandwidth or operating frequency of the filter. Because of the high-Q nature of ring resonator, assymetric frequency responses are achieved with an in-band insertion loss <2.9 dB and out-of-band suppression >55 db at 190 MHz from the center-frequency of 2.2 GHz. Additionally, the filter is provided with tunable source-load coupling to isolate the movement of two FTZs.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"60 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128961067","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931292
Asmaa I. Afifi, A. Abdel-Rahman
In this manuscript the ring resonator for breast cancer and broken bones detection is fabricated. By using the principle of material characterization the presence of tumor cause shifting in resonant frequency and variation in phase and hence the group delay will be varying. The ring resonator is sufficient for forming 2D image for breast with tumor and 1D image for finger joints which indicate on the possibility of using this resonator for bones fractures detection.
{"title":"Ring resonator for breast cancer and broken bones detection","authors":"Asmaa I. Afifi, A. Abdel-Rahman","doi":"10.1109/APMC.2016.7931292","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931292","url":null,"abstract":"In this manuscript the ring resonator for breast cancer and broken bones detection is fabricated. By using the principle of material characterization the presence of tumor cause shifting in resonant frequency and variation in phase and hence the group delay will be varying. The ring resonator is sufficient for forming 2D image for breast with tumor and 1D image for finger joints which indicate on the possibility of using this resonator for bones fractures detection.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129167404","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931432
G. Anand, Rohit Lahiri, Rahul Sadhu
A wide band DC-18 GHz microstrip to microstrip vertical transition for Microwave Integrated Circuits (MICs) using coaxial design approach for Radar & EW applications, is being explained in this paper. A simple, flexible, self-supporting and economical solution for wideband vertical coaxial transition with respect to Microstrip lines for MICs has been brought out in this paper to avoid RF cross overs. It consist of coaxial structure which in turn connected to two microstrip lines in top and bottom side of two different pcbs. The signal is going through two transitions: a) Quasi TEM mode to pure TEM mode and b) TEM mode to Quasi TEM mode. The challenge of this transition is to provide better matching at the transitions to ensure better input and output VSWR, and hence minimum insertion loss for the required frequency band. Insertion loss of max 0.5dB @ 18GHz and return loss more than 20dB for DC-18 GHz frequency band was targeted. Also, the size (length & diameter) of the vertical transition can be customized as per requirement compared to RF glass bead which are available of standard size.
{"title":"Wide band microstrip to microstrip vertical coaxial transition for radar & EW applications","authors":"G. Anand, Rohit Lahiri, Rahul Sadhu","doi":"10.1109/APMC.2016.7931432","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931432","url":null,"abstract":"A wide band DC-18 GHz microstrip to microstrip vertical transition for Microwave Integrated Circuits (MICs) using coaxial design approach for Radar & EW applications, is being explained in this paper. A simple, flexible, self-supporting and economical solution for wideband vertical coaxial transition with respect to Microstrip lines for MICs has been brought out in this paper to avoid RF cross overs. It consist of coaxial structure which in turn connected to two microstrip lines in top and bottom side of two different pcbs. The signal is going through two transitions: a) Quasi TEM mode to pure TEM mode and b) TEM mode to Quasi TEM mode. The challenge of this transition is to provide better matching at the transitions to ensure better input and output VSWR, and hence minimum insertion loss for the required frequency band. Insertion loss of max 0.5dB @ 18GHz and return loss more than 20dB for DC-18 GHz frequency band was targeted. Also, the size (length & diameter) of the vertical transition can be customized as per requirement compared to RF glass bead which are available of standard size.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116039275","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 : 2016-12-01DOI: 10.1109/APMC.2016.7931453
P. Jayasri, C. Reddy, M. Joseph, H.S.V. Usha Sundari, E. S. Kumari, A. Prasad
Synthetic Aperture Radar sensors are very sensitive to changes in soil moisture and surface roughness, making SAR useful for characterizing long-term post-fire patterns/trends. The present study has analyzed and quantified forest burnt areas of selected fire prone ecosystems i.e. Nallamalais of Andhra Pradesh and Part of Tripura, India. RISAT-1 data pertaining to pre and post fire were utilized. Encouraging results are obtained based on backscattering coefficient for pre and post fires events in two study areas.
{"title":"A case study on utilization of RISAT-1 SAR data for forest burnt area detection in India","authors":"P. Jayasri, C. Reddy, M. Joseph, H.S.V. Usha Sundari, E. S. Kumari, A. Prasad","doi":"10.1109/APMC.2016.7931453","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931453","url":null,"abstract":"Synthetic Aperture Radar sensors are very sensitive to changes in soil moisture and surface roughness, making SAR useful for characterizing long-term post-fire patterns/trends. The present study has analyzed and quantified forest burnt areas of selected fire prone ecosystems i.e. Nallamalais of Andhra Pradesh and Part of Tripura, India. RISAT-1 data pertaining to pre and post fire were utilized. Encouraging results are obtained based on backscattering coefficient for pre and post fires events in two study areas.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"71 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117056877","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：