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.2016.7931297
F. Zulkifli, Amirsyah Rayhan Mubarak, Basari, E. Rahardjo
This paper presents a Differentially-Driven Rectifier (DDR) for Radio Frequency (RF) energy harvesting system at WLAN frequency 2.4 GHz. This rectifier converts the RF signal into direct current (DC) voltage at the given frequency band. A parameter-S and transient analysis on rectifier circuit is carried out to investigate its band, efficiency and output voltage. The optimum parameters including the value of capacitance, inductance and load value are calculated with HSMS-2850 Schottky Diode. Simulation and measurement results are presented that passive component based circuit can significantly increase the RF input voltage and broaden the input range of the rectifier. The DDR simulation results the efficiency up to 75.65% and 3.58 V output voltage at 10 dBm input power. Meanwhile, the measurement results show efficiency up to 56.39% and 1.01 V output voltage at the same input power.
{"title":"Differentially-Driven Rectifier for energy harvesting","authors":"F. Zulkifli, Amirsyah Rayhan Mubarak, Basari, E. Rahardjo","doi":"10.1109/APMC.2016.7931297","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931297","url":null,"abstract":"This paper presents a Differentially-Driven Rectifier (DDR) for Radio Frequency (RF) energy harvesting system at WLAN frequency 2.4 GHz. This rectifier converts the RF signal into direct current (DC) voltage at the given frequency band. A parameter-S and transient analysis on rectifier circuit is carried out to investigate its band, efficiency and output voltage. The optimum parameters including the value of capacitance, inductance and load value are calculated with HSMS-2850 Schottky Diode. Simulation and measurement results are presented that passive component based circuit can significantly increase the RF input voltage and broaden the input range of the rectifier. The DDR simulation results the efficiency up to 75.65% and 3.58 V output voltage at 10 dBm input power. Meanwhile, the measurement results show efficiency up to 56.39% and 1.01 V output voltage at the same input power.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"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":"131516285","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.2016.7931382
A. Barakat, Sherif Hekal, R. Pokharel
This paper presents a simple and precise design method for asymmetric resonant inductive coupled wireless power transfer (WPT) systems without the involvement of circuit or electromagnetic (EM) simulators. The design method is based on the generalized second-order band-pass filter (BPF). First, the values of the BPF's J-inverters are computed based on the mutual coupling between the transmitter (TX) and the receiver (RX). Then, the required components are extracted from the J-inverters values. We achieved good agreements between the analytical design procedure, the circuit and the EM simulations, and the measurements. The measured efficiency is 75% at a transmission distance of 38 mm, and the sizes of the TX and RX are 50×50 mm2 and 30×30 mm2, respectively.
{"title":"Simple design approach for asymmetric resonant inductive coupled WPT systems using J-inverters","authors":"A. Barakat, Sherif Hekal, R. Pokharel","doi":"10.1109/APMC.2016.7931382","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931382","url":null,"abstract":"This paper presents a simple and precise design method for asymmetric resonant inductive coupled wireless power transfer (WPT) systems without the involvement of circuit or electromagnetic (EM) simulators. The design method is based on the generalized second-order band-pass filter (BPF). First, the values of the BPF's J-inverters are computed based on the mutual coupling between the transmitter (TX) and the receiver (RX). Then, the required components are extracted from the J-inverters values. We achieved good agreements between the analytical design procedure, the circuit and the EM simulations, and the measurements. The measured efficiency is 75% at a transmission distance of 38 mm, and the sizes of the TX and RX are 50×50 mm2 and 30×30 mm2, respectively.","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":"128369416","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.2016.7931404
Manmohan C.T., R. U. Nair, Hema Singh
Low observability can be achieved by increasing absorption along with decreasing reflection and transmission. Most of the devices are made up of conducting materials which has high reflection characteristics. Radar absorbing structure (RAS) over such metallic objects can reduce the radar cross section (RCS) effectively. In this paper, carbon nano-composite is used in RAS design to achieve improved electromagnetic (EM) absorption over wide frequency range with optimum thickness. The results obtained through computations and full wave simulations are shown to be in good agreement. It is demonstrated that an optimized design and proper choice of material can provide an efficient RAS with minimum bulkiness.
{"title":"Radar absorbing structures using carbon nano-composites: EM design and performance analysis","authors":"Manmohan C.T., R. U. Nair, Hema Singh","doi":"10.1109/APMC.2016.7931404","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931404","url":null,"abstract":"Low observability can be achieved by increasing absorption along with decreasing reflection and transmission. Most of the devices are made up of conducting materials which has high reflection characteristics. Radar absorbing structure (RAS) over such metallic objects can reduce the radar cross section (RCS) effectively. In this paper, carbon nano-composite is used in RAS design to achieve improved electromagnetic (EM) absorption over wide frequency range with optimum thickness. The results obtained through computations and full wave simulations are shown to be in good agreement. It is demonstrated that an optimized design and proper choice of material can provide an efficient RAS with minimum bulkiness.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"4 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":"134415182","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.2016.7931331
Priyanka Choudhary, Damanjeet Kaur, B. Kanaujia, Shantanu Dwari
A triple band monopole coaxial feed antenna which incorporates a ring shaped elliptical radiator operating on multi-frequency bands of 6.2 GHz, 7.6 GHz and 9.1 GHz is presented. Parametric analysis is performed along with frequency reconfigurability using PIN diodes. PEC and lumped RLC techniques are shown for implementation of PIN diode. Substrate variation is also performed with RT Duroid, FR4 and Taconic RF-60. This antenna covers WLAN, Body Area Networks, C-band and X-band applications.
{"title":"Triple-band frequency agile Monopole antenna using PIN diode for wireless communications","authors":"Priyanka Choudhary, Damanjeet Kaur, B. Kanaujia, Shantanu Dwari","doi":"10.1109/APMC.2016.7931331","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931331","url":null,"abstract":"A triple band monopole coaxial feed antenna which incorporates a ring shaped elliptical radiator operating on multi-frequency bands of 6.2 GHz, 7.6 GHz and 9.1 GHz is presented. Parametric analysis is performed along with frequency reconfigurability using PIN diodes. PEC and lumped RLC techniques are shown for implementation of PIN diode. Substrate variation is also performed with RT Duroid, FR4 and Taconic RF-60. This antenna covers WLAN, Body Area Networks, C-band and X-band applications.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"32 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":"132995176","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}
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