Pub Date : 2016-12-01DOI: 10.1109/APMC.2016.7931411
Abdullah Alburaikan, Mohammed Aqeeli, G. Jawad, A. Biswas, Zhirun Hu
A new and simple approach to design high selectivity microstrip bandpass filter (BPF) is reported. Based on the signal interference concept, the selectivity of a BPF using composite right/left handed transmission line (CRLH TL) unit cell is significantly improved. Thus, by employing a single coupled line section and CRLH TL unit cell in the feedback, a bandpass filter with high selectivity, multiple transmission zeros (TZs) within the upper stopband and low insertion loss can be realized. The simulation results show that the proposed BPF has a fractional bandwidth of 8% centred at 2.4 GHz with high roll-off rate of 300 dB/GHz.
{"title":"High selectivity microstrip bandpass filter using feedback CRLH-TL unit cell","authors":"Abdullah Alburaikan, Mohammed Aqeeli, G. Jawad, A. Biswas, Zhirun Hu","doi":"10.1109/APMC.2016.7931411","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931411","url":null,"abstract":"A new and simple approach to design high selectivity microstrip bandpass filter (BPF) is reported. Based on the signal interference concept, the selectivity of a BPF using composite right/left handed transmission line (CRLH TL) unit cell is significantly improved. Thus, by employing a single coupled line section and CRLH TL unit cell in the feedback, a bandpass filter with high selectivity, multiple transmission zeros (TZs) within the upper stopband and low insertion loss can be realized. The simulation results show that the proposed BPF has a fractional bandwidth of 8% centred at 2.4 GHz with high roll-off rate of 300 dB/GHz.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"91 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":"115364775","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.2016.7931438
Dr. Jagannath Malik, A. Patnaik, M. V. Kartikeyan
A modulated metasurface has been proposed with a ability to manipulate polarization of signal. The metasurface is made of 2-dimentional arrangement of angle modulated split ring resonators (SRRs) that can convert linearly polarized signal to circularly polarized signal. As a proof-of-concept, by placing the modulated metasurface over a linearly polarized microstrip patch antenna, circularly polarized radiation is observed at far-field.
{"title":"Modulated metasurface for circular polarization","authors":"Dr. Jagannath Malik, A. Patnaik, M. V. Kartikeyan","doi":"10.1109/APMC.2016.7931438","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931438","url":null,"abstract":"A modulated metasurface has been proposed with a ability to manipulate polarization of signal. The metasurface is made of 2-dimentional arrangement of angle modulated split ring resonators (SRRs) that can convert linearly polarized signal to circularly polarized signal. As a proof-of-concept, by placing the modulated metasurface over a linearly polarized microstrip patch antenna, circularly polarized radiation is observed at far-field.","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":"115008327","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.2016.7931370
M. Addou, Ragheb Hijazi, R. Gómez‐García, B. Barelaud, B. Jarry, J. Lintignat
In this paper, an original silicon-integrated RF differential channelized active bandpass filter is presented. The circuit is implemented by using a three-branch bandpass N-path switched-capacitor filter architecture. A selective pre-filter (FM) is implemented at the input of the receiver that allows an attenuation higher than 10 dB for the adjacent channel interferer located 23-MHz away from the center frequency of the considered channel. Two other parallel-type branches of N-path bandpass filters (FA1 and FA2) with downward and upward frequency shifting are used. The outputs of the pre-filter and the two other bandpass filters are subtracted to create two close-to-passband transmission zeros that enable to achieve high selectivity in the overall filtering transfer function. The channelized bandpass filter can be frequency tuned from 0.2 GHz to 1 GHz. The gain, NF, and channel bandwidth of the filter at 500 MHz are around 20 dB, 4.7 dB, and 5 MHz, respectively. The circuit has been designed with 0.25 µm BiCMOS process of NXP technology using Cadence SpectreRF circuit simulator.
{"title":"Three-branch channelized N-path bandpass filter for a Zigbee application","authors":"M. Addou, Ragheb Hijazi, R. Gómez‐García, B. Barelaud, B. Jarry, J. Lintignat","doi":"10.1109/APMC.2016.7931370","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931370","url":null,"abstract":"In this paper, an original silicon-integrated RF differential channelized active bandpass filter is presented. The circuit is implemented by using a three-branch bandpass N-path switched-capacitor filter architecture. A selective pre-filter (FM) is implemented at the input of the receiver that allows an attenuation higher than 10 dB for the adjacent channel interferer located 23-MHz away from the center frequency of the considered channel. Two other parallel-type branches of N-path bandpass filters (FA1 and FA2) with downward and upward frequency shifting are used. The outputs of the pre-filter and the two other bandpass filters are subtracted to create two close-to-passband transmission zeros that enable to achieve high selectivity in the overall filtering transfer function. The channelized bandpass filter can be frequency tuned from 0.2 GHz to 1 GHz. The gain, NF, and channel bandwidth of the filter at 500 MHz are around 20 dB, 4.7 dB, and 5 MHz, respectively. The circuit has been designed with 0.25 µm BiCMOS process of NXP technology using Cadence SpectreRF circuit simulator.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"17 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":"116787850","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.2016.7931386
H. Baskey, T. C. Shami, R. Kumar, S. Kumar, A. Dixit, N. Prasad
In this paper a monolithic radar absorbing composite based on the fabric based multilayer laminates have been designed and fabricated. The multilayer laminate consists of the glass and carbon based fabrics along with lossy dielectric fillers in the epoxy medium. The individual laminates have been fabricated using vaccum bagging technology and their constitutive electromagnetic properties e.g. dielectric constant and loss tangent have been evaluated using the quasi optical free space measurement system (QOFMS) in the W band (75–110 GHz) frequency region. Based on the simulated results, optimized monolithic configuration of individual laminates have been fabricated and tested for the electromagnetic absorption using QOFMS. The experimental result shows minimum 10 dB reflection loss (90% electromagnetic absorption) across the entire frequency region. The fabricated structure shows potential applications for the radar cross section reduction for the stealth applications.
{"title":"Monolithic composite based on multilayered fabrics for W-band radar absorber","authors":"H. Baskey, T. C. Shami, R. Kumar, S. Kumar, A. Dixit, N. Prasad","doi":"10.1109/APMC.2016.7931386","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931386","url":null,"abstract":"In this paper a monolithic radar absorbing composite based on the fabric based multilayer laminates have been designed and fabricated. The multilayer laminate consists of the glass and carbon based fabrics along with lossy dielectric fillers in the epoxy medium. The individual laminates have been fabricated using vaccum bagging technology and their constitutive electromagnetic properties e.g. dielectric constant and loss tangent have been evaluated using the quasi optical free space measurement system (QOFMS) in the W band (75–110 GHz) frequency region. Based on the simulated results, optimized monolithic configuration of individual laminates have been fabricated and tested for the electromagnetic absorption using QOFMS. The experimental result shows minimum 10 dB reflection loss (90% electromagnetic absorption) across the entire frequency region. The fabricated structure shows potential applications for the radar cross section reduction for the stealth applications.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"420 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":"122011094","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.2016.7931324
Ali Kürsad Görür, C. Karpuz, Adnan Görür, Engin Dogan, Barış Uysal
In this paper, a novel microstrip bandstop filter with tunable center frequency and bandwidth is introduced. A dual-mode square loop resonator and three varactor diodes are used to achieve the tunability operation. The dual-mode square loop resonator is coupled to a straight transmission line that connects input and output ports. One of the varactors is used as a perturbation element on the symmetrical axis of the resonator and even mode resonance frequency can be tuned by changing the capacitance of its. Remaining two varactors are located at the lateral arms of the resonator as reference elements and they have task on the tunability of the odd mode resonance frequency. Depending on the capacitance changes of the varactors, both of center frequency and bandwidth of the stopband can be tuned. The designed filter was also fabricated and measured for the experimental verification of the predicted results.
{"title":"Design of tunable microstrip bandstop filter","authors":"Ali Kürsad Görür, C. Karpuz, Adnan Görür, Engin Dogan, Barış Uysal","doi":"10.1109/APMC.2016.7931324","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931324","url":null,"abstract":"In this paper, a novel microstrip bandstop filter with tunable center frequency and bandwidth is introduced. A dual-mode square loop resonator and three varactor diodes are used to achieve the tunability operation. The dual-mode square loop resonator is coupled to a straight transmission line that connects input and output ports. One of the varactors is used as a perturbation element on the symmetrical axis of the resonator and even mode resonance frequency can be tuned by changing the capacitance of its. Remaining two varactors are located at the lateral arms of the resonator as reference elements and they have task on the tunability of the odd mode resonance frequency. Depending on the capacitance changes of the varactors, both of center frequency and bandwidth of the stopband can be tuned. The designed filter was also fabricated and measured for the experimental verification of the predicted results.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"21 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":"122047933","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.2016.7931403
Sangeeta Goyal, S. S. Ram, V. Bohara
A reconfigurable Doppler radar is implemented on a software defined radio platform for detecting humans behind walls. Two types of configurations are tested - a continuous wave radar and an orthogonal frequency division multiplex (OFDM) radar. Both the configurations yield micro-Doppler signatures while the OFDM radar gives additional range information. Measurement results of single and two humans are presented in through wall scenario.
{"title":"Reconfigurable Doppler radar using software defined radio platform for through-wall applications","authors":"Sangeeta Goyal, S. S. Ram, V. Bohara","doi":"10.1109/APMC.2016.7931403","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931403","url":null,"abstract":"A reconfigurable Doppler radar is implemented on a software defined radio platform for detecting humans behind walls. Two types of configurations are tested - a continuous wave radar and an orthogonal frequency division multiplex (OFDM) radar. Both the configurations yield micro-Doppler signatures while the OFDM radar gives additional range information. Measurement results of single and two humans are presented in through wall scenario.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"35 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":"128637726","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.2016.7931434
Junyu Shen, Michael Aiken, Collin Ladd, M. Dickey, D. Ricketts
Using a modified version of the Tollens' Test, acrylate-based polymer prints made using a consumer-grade Digital Light Projection Stereolithographic (DLP-SLA) 3D printer are successfully silver plated, without the need for complex surface preparation techniques. A single-piece prototype waveguide design is used for testing the plating process, and a discussion is provided on minimizing printing process variables such as polymerization shrinkage and undesirable geometric tolerance variance. Measurement results of plated WR-10 1-inch waveguide sections show reflection coefficients of less than −21dB and an insertion loss of less than 0.53dB, which are comparable to similar studies using specialized plating and split-block designs. Furthermore, this approach shows great potential in providing an affordable passive microwave component rapid prototyping solution for research environments.
{"title":"A simple electroless plating solution for 3D printed microwave components","authors":"Junyu Shen, Michael Aiken, Collin Ladd, M. Dickey, D. Ricketts","doi":"10.1109/APMC.2016.7931434","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931434","url":null,"abstract":"Using a modified version of the Tollens' Test, acrylate-based polymer prints made using a consumer-grade Digital Light Projection Stereolithographic (DLP-SLA) 3D printer are successfully silver plated, without the need for complex surface preparation techniques. A single-piece prototype waveguide design is used for testing the plating process, and a discussion is provided on minimizing printing process variables such as polymerization shrinkage and undesirable geometric tolerance variance. Measurement results of plated WR-10 1-inch waveguide sections show reflection coefficients of less than −21dB and an insertion loss of less than 0.53dB, which are comparable to similar studies using specialized plating and split-block designs. Furthermore, this approach shows great potential in providing an affordable passive microwave component rapid prototyping solution for research environments.","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":"129648857","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.2016.7931479
Ashok Kumar, I. B. Sharma, R. Saraswat, M. M. Sharma
A dual band-notched UWB antenna with switchable five notched stop bands is presented. Predicated impedance bandwidth 3.2–15 GHz with dual notched stop bands 5.47–6.15 and 7.88–12 GHz are achieved by loading a modified T-shaped ring slot on the feed line with radiating patch. Furthermore, four diodes are employed on modified T-shaped ring slot on different locations to make antenna switchable at five notched bands. The radiation pattern and gain is analyzed and results presented.
{"title":"Dual band-notched circular disc monopole UWB antenna with switchable five notched stop bands","authors":"Ashok Kumar, I. B. Sharma, R. Saraswat, M. M. Sharma","doi":"10.1109/APMC.2016.7931479","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931479","url":null,"abstract":"A dual band-notched UWB antenna with switchable five notched stop bands is presented. Predicated impedance bandwidth 3.2–15 GHz with dual notched stop bands 5.47–6.15 and 7.88–12 GHz are achieved by loading a modified T-shaped ring slot on the feed line with radiating patch. Furthermore, four diodes are employed on modified T-shaped ring slot on different locations to make antenna switchable at five notched bands. The radiation pattern and gain is analyzed and results presented.","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":"130638969","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.2016.7931270
M. Abdolhamidi, M. Mohammad‐Taheri
A wideband interconnect with complete DC-isolation property (both in the Signal and Ground paths) for differential TEM transmission lines (like broadside-coupled striplines) is presented. The overall length of the proposed structure is only 0.1λg at the center frequency of 100 ∼ 500 GHz frequency band. The simulated interconnect shows more than 20 dB of return losses at the input and output ports in 130 ∼ 280 GHz band (about 0.7 octave). In addition, more than 15dB of return losses is achieved in the simulations in the entire 100 ∼ 500 GHz frequency band. The built-in DC-isolation property of both the Signal and Ground paths, makes the presented interconnect a suitable solution for Signal-Ground swapping applications of integrated active circuits, like that of the microstrip to inverted-microstrip transitions. The presented design procedure is applicable to various standard IC fabrication processes.
{"title":"A compact wideband differential interconnect for complete series DC-isolation of integrated circuits above 100 GHz","authors":"M. Abdolhamidi, M. Mohammad‐Taheri","doi":"10.1109/APMC.2016.7931270","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931270","url":null,"abstract":"A wideband interconnect with complete DC-isolation property (both in the Signal and Ground paths) for differential TEM transmission lines (like broadside-coupled striplines) is presented. The overall length of the proposed structure is only 0.1λg at the center frequency of 100 ∼ 500 GHz frequency band. The simulated interconnect shows more than 20 dB of return losses at the input and output ports in 130 ∼ 280 GHz band (about 0.7 octave). In addition, more than 15dB of return losses is achieved in the simulations in the entire 100 ∼ 500 GHz frequency band. The built-in DC-isolation property of both the Signal and Ground paths, makes the presented interconnect a suitable solution for Signal-Ground swapping applications of integrated active circuits, like that of the microstrip to inverted-microstrip transitions. The presented design procedure is applicable to various standard IC fabrication processes.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"29 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":"132777843","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.2016.7931309
Hema Mehta, H. Kaur
In this work, we have theoretically investigated the impact of temperature dependent Negative Capacitance (NC) effect on electrical characteristics of long channel Double Gate Ferroelectric Junctionless Transistor for temperature range 280 to 340K. We have considered metal-ferroelectric-semiconductor (MFS) structure and incorporated ferroelectric material Strontium Bismuth Tantalate (SBT) as gate insulator. The impact of temperature variation on electrical parameters such as surface potential, gain, gate capacitance, and mobile charge density has been studied. It has been observed that internal voltage amplification decreases with increase in temperature. Also, degradation of gain and gate capacitance is observed with gradual increase in temperature.
{"title":"Analytical model to study temperature dependent Negative Capacitance effect on long channel Double Gate Ferroelectric Junctionless Transistor","authors":"Hema Mehta, H. Kaur","doi":"10.1109/APMC.2016.7931309","DOIUrl":"https://doi.org/10.1109/APMC.2016.7931309","url":null,"abstract":"In this work, we have theoretically investigated the impact of temperature dependent Negative Capacitance (NC) effect on electrical characteristics of long channel Double Gate Ferroelectric Junctionless Transistor for temperature range 280 to 340K. We have considered metal-ferroelectric-semiconductor (MFS) structure and incorporated ferroelectric material Strontium Bismuth Tantalate (SBT) as gate insulator. The impact of temperature variation on electrical parameters such as surface potential, gain, gate capacitance, and mobile charge density has been studied. It has been observed that internal voltage amplification decreases with increase in temperature. Also, degradation of gain and gate capacitance is observed with gradual increase in temperature.","PeriodicalId":166478,"journal":{"name":"2016 Asia-Pacific Microwave Conference (APMC)","volume":"42 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":"126333657","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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