Pub Date : 2015-12-01DOI: 10.1109/IMARC.2015.7411392
P. Venkaiah, T. P. Kumar
This paper presents a technique for demodulating the DPSK (Differential Phase Shift Keying) signal in digital Receivers. This technique is in contrast to the conventional delay and comparison method as it uses quadrants information for DPSK demodulation with optimum delay and less no. of FPGA (Field Programmable Gate Arrays) resources. The scope of this paper is to demodulate the DPSK Signal for Civil Mode `S' IFF (Identification of Friend or Foe) MKXII System. This method can be implemented easily in hardware with good performance. It is based on CORDIC (Coordinate Rotation Digital Computer) algorithm. In this the quadrants are selected based on I and Q data generated from ADC samples. From the quadrants Phase difference will be found. Based on the phase difference DPSK data shall be decoded to retrieve the information.
{"title":"Implementation of DPSK demodulation using quadrants method in FPGA for IFF MKXII digital receiver","authors":"P. Venkaiah, T. P. Kumar","doi":"10.1109/IMARC.2015.7411392","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411392","url":null,"abstract":"This paper presents a technique for demodulating the DPSK (Differential Phase Shift Keying) signal in digital Receivers. This technique is in contrast to the conventional delay and comparison method as it uses quadrants information for DPSK demodulation with optimum delay and less no. of FPGA (Field Programmable Gate Arrays) resources. The scope of this paper is to demodulate the DPSK Signal for Civil Mode `S' IFF (Identification of Friend or Foe) MKXII System. This method can be implemented easily in hardware with good performance. It is based on CORDIC (Coordinate Rotation Digital Computer) algorithm. In this the quadrants are selected based on I and Q data generated from ADC samples. From the quadrants Phase difference will be found. Based on the phase difference DPSK data shall be decoded to retrieve the information.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116096798","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411447
A. Sahu, V. Devabhaktuni, P. Aaen
In this paper we present the design of a millimeter-wave antenna based on recently developed ridge gap waveguide (RWG) technology. This is the first antenna designed based on this technology to operate in V-band (45-70 GHz). The antenna operates at 68.7 GHz with a bandwidth of 900 MHz. The feed network consists of a quarter-wavelength ridge gap waveguide resonator that excites a slot in the top metal plate. The corners of the slot are optimized for improved impedance matching. The simulated antenna has a gain of 7.0 dBi and an input reflection coefficient of -20.8 dB. Finite-element based electromagnetic simulations show that it is possible to scale ridge gap waveguide designs to operate in V-band.
{"title":"A slot anntenna designed in ridge gap waveguide technology for V-band applications","authors":"A. Sahu, V. Devabhaktuni, P. Aaen","doi":"10.1109/IMARC.2015.7411447","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411447","url":null,"abstract":"In this paper we present the design of a millimeter-wave antenna based on recently developed ridge gap waveguide (RWG) technology. This is the first antenna designed based on this technology to operate in V-band (45-70 GHz). The antenna operates at 68.7 GHz with a bandwidth of 900 MHz. The feed network consists of a quarter-wavelength ridge gap waveguide resonator that excites a slot in the top metal plate. The corners of the slot are optimized for improved impedance matching. The simulated antenna has a gain of 7.0 dBi and an input reflection coefficient of -20.8 dB. Finite-element based electromagnetic simulations show that it is possible to scale ridge gap waveguide designs to operate in V-band.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124029220","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411404
S. Biswas, V. Revathi
A 6-18 GHz wideband frequency synthesizer with 100 kHz frequency resolution using hybrid Direct Digital Synthesizer (DDS) and Phase Locked Loop (PLL) architecture is presented in this paper. The DDS is used as a reference to the PLL multiplier to extend the frequency range. To achieve fast frequency switching from the overall architecture the PLL is optimized with wide loop bandwidth. But the compromise in doing so is the insufficient rejection of the high close-in DDS spurs by the loop filter. A low spurious noise is achieved in this design by avoiding the bands of DDS frequencies with close-in spurs less than the PLL loop bandwidth using alternate DDS frequencies and consecutive PLL division ratios. Maximum switching time of 6 us and spur levels less than -50 dBc is achieved from the developed module. This module can be used as frequency-agile Local Oscillator (LO) in wideband microwave receivers.
{"title":"A fast-switching low-spurious 6–18 GHz hybrid frequency synthesizer","authors":"S. Biswas, V. Revathi","doi":"10.1109/IMARC.2015.7411404","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411404","url":null,"abstract":"A 6-18 GHz wideband frequency synthesizer with 100 kHz frequency resolution using hybrid Direct Digital Synthesizer (DDS) and Phase Locked Loop (PLL) architecture is presented in this paper. The DDS is used as a reference to the PLL multiplier to extend the frequency range. To achieve fast frequency switching from the overall architecture the PLL is optimized with wide loop bandwidth. But the compromise in doing so is the insufficient rejection of the high close-in DDS spurs by the loop filter. A low spurious noise is achieved in this design by avoiding the bands of DDS frequencies with close-in spurs less than the PLL loop bandwidth using alternate DDS frequencies and consecutive PLL division ratios. Maximum switching time of 6 us and spur levels less than -50 dBc is achieved from the developed module. This module can be used as frequency-agile Local Oscillator (LO) in wideband microwave receivers.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122707287","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411430
Ritesh Kumar, P. Keerthan, K. Vinoy
In this paper, a tunable dispersive delay line using all pass network (APN) in UHF-Band has been designed using lumped elements. Two stages of second order APN has been cascaded, out of which one stage is fixed, where as the other stage is tuned for its group delay response. Tunability is achieved by replacing capacitors with varactor diodes. This approach gives a fractional bandwidth greater than 30% along with a tunable negative group delay slope of [8-3] ns/GHz over the frequency range of [650-850] MHz. The input and output matching is better than 10 dB and insertion loss less than 1.8 dB. Time domain measurements are carried out to validate the tunability in pulse stretching and compression. Such networks can be used for group delay engineering based applications such as frequency discriminators, spectrum sensing and reflection as well as transmission type group delay based RFID tags.
{"title":"Design of wideband tunable dispersive delay using cascaded all pass networks","authors":"Ritesh Kumar, P. Keerthan, K. Vinoy","doi":"10.1109/IMARC.2015.7411430","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411430","url":null,"abstract":"In this paper, a tunable dispersive delay line using all pass network (APN) in UHF-Band has been designed using lumped elements. Two stages of second order APN has been cascaded, out of which one stage is fixed, where as the other stage is tuned for its group delay response. Tunability is achieved by replacing capacitors with varactor diodes. This approach gives a fractional bandwidth greater than 30% along with a tunable negative group delay slope of [8-3] ns/GHz over the frequency range of [650-850] MHz. The input and output matching is better than 10 dB and insertion loss less than 1.8 dB. Time domain measurements are carried out to validate the tunability in pulse stretching and compression. Such networks can be used for group delay engineering based applications such as frequency discriminators, spectrum sensing and reflection as well as transmission type group delay based RFID tags.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131872141","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411426
Huei Wang
The development of CMOS millimeter-wave (MMW) radio frequency integrated circuits (RFICs) has been grown rapidly in the past ten years. This paper reviews the advances of the CMOS MMW RFICs. The history and current status of the MMW CMOS RFICs, including some of the high-level integration of the system-on-chip (SoC) CMOS chips, are summarized. The applications of the MMW RFICs, together with the examples of system-in-package (SiP) for MMW CMOS RFICs will also be presented.
{"title":"Review of CMOS millimeter-wave radio frequency integrated circuits","authors":"Huei Wang","doi":"10.1109/IMARC.2015.7411426","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411426","url":null,"abstract":"The development of CMOS millimeter-wave (MMW) radio frequency integrated circuits (RFICs) has been grown rapidly in the past ten years. This paper reviews the advances of the CMOS MMW RFICs. The history and current status of the MMW CMOS RFICs, including some of the high-level integration of the system-on-chip (SoC) CMOS chips, are summarized. The applications of the MMW RFICs, together with the examples of system-in-package (SiP) for MMW CMOS RFICs will also be presented.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129116845","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411366
S. Mukherjee, A. Biswas
In this paper, design of Substrate Integrated Waveguide (SIW) broadband unequal power divider is presented. A simple design technique to implement the unequal power division while maintaining a broad bandwidth is achieved only by changing the length of the step in the coupling region and H-plane matching step at the input while keeping all other dimensions same. A set of design curves are also presented to extend the proposed design technique to a large range of unequal power division. Two fabricated prototype of 1:4 and 1:8 power divider are presented which operate throughout the X band (8-12 GHz).
{"title":"Implementation of broadband unequal power divider using substrate integrated waveguide (SIW) technology","authors":"S. Mukherjee, A. Biswas","doi":"10.1109/IMARC.2015.7411366","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411366","url":null,"abstract":"In this paper, design of Substrate Integrated Waveguide (SIW) broadband unequal power divider is presented. A simple design technique to implement the unequal power division while maintaining a broad bandwidth is achieved only by changing the length of the step in the coupling region and H-plane matching step at the input while keeping all other dimensions same. A set of design curves are also presented to extend the proposed design technique to a large range of unequal power division. Two fabricated prototype of 1:4 and 1:8 power divider are presented which operate throughout the X band (8-12 GHz).","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132385920","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411390
Mohamad Khalil, M. Kamarei, J. Jomaah, H. Ayad
Here in this paper we present a new miniaturized SIW using two techniques together, the first is the Slow-Wave SIW and the second is the Half-Mode SIW. Combining these two techniques shows that we can miniaturize our SIW with a factor of 70%. Comparing to other published papers we have miniaturized the usual SW-SIW without decreasing the quality factor or increasing losses. Also a model for calculating the effective permittivity of these type of transmission line is proposed.
{"title":"Substrate Integrated Waveguide miniaturization using Slow Wave and Half Mode techniques","authors":"Mohamad Khalil, M. Kamarei, J. Jomaah, H. Ayad","doi":"10.1109/IMARC.2015.7411390","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411390","url":null,"abstract":"Here in this paper we present a new miniaturized SIW using two techniques together, the first is the Slow-Wave SIW and the second is the Half-Mode SIW. Combining these two techniques shows that we can miniaturize our SIW with a factor of 70%. Comparing to other published papers we have miniaturized the usual SW-SIW without decreasing the quality factor or increasing losses. Also a model for calculating the effective permittivity of these type of transmission line is proposed.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116860193","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411411
A. Sharma, Ajay Kumar, A. Bhattacharya
This paper presents a 6-bit digital phase shifter designed at Ku-band for electronic beam steering of satellite based phased array antenna systems. The phase shifter is implemented using space qualified 0.25-μm pHEMT GaAs MMIC process. Each individual bit of the phase shifter is designed using optimum topology to achieve minimal insertion loss, accurate phase shifting and low amplitude variations. The measured performance of all 64 states of the phase shifter demonstrates an insertion loss of 6.1±0.6 dB with RMS phase error <; 1.3°, RMS amplitude error <; 0.35 dB and return losses better than 15 dB over 12-13 GHz frequency range. The circuit consumes negligible power (<;0.5mW) and has dimensions of 6.1×1.5 mm2 to fit in a multi-function single chip beam forming MMIC. The low insertion loss and high accuracy of the phase shifter are key features of the MMIC, making it suitable for high precision beam forming applications.
{"title":"A Ku-band 6-bit digital phase shifter MMIC for phased array antenna systems","authors":"A. Sharma, Ajay Kumar, A. Bhattacharya","doi":"10.1109/IMARC.2015.7411411","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411411","url":null,"abstract":"This paper presents a 6-bit digital phase shifter designed at Ku-band for electronic beam steering of satellite based phased array antenna systems. The phase shifter is implemented using space qualified 0.25-μm pHEMT GaAs MMIC process. Each individual bit of the phase shifter is designed using optimum topology to achieve minimal insertion loss, accurate phase shifting and low amplitude variations. The measured performance of all 64 states of the phase shifter demonstrates an insertion loss of 6.1±0.6 dB with RMS phase error <; 1.3°, RMS amplitude error <; 0.35 dB and return losses better than 15 dB over 12-13 GHz frequency range. The circuit consumes negligible power (<;0.5mW) and has dimensions of 6.1×1.5 mm2 to fit in a multi-function single chip beam forming MMIC. The low insertion loss and high accuracy of the phase shifter are key features of the MMIC, making it suitable for high precision beam forming applications.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128544614","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 : 2015-12-01DOI: 10.1109/IMARC.2015.7411429
R. Kalyan, K. Rawat, S. Koul
This paper presents the analysis and design of reconfigurable concurrent dual-band quarter-wave transformer using two single pole single throw Micro-Electro-Mechanical Switches. The transformer will behave as concurrent dual-band quarter-wave transmission line at 800 MHz and 1800 MHz, when both the switches are OFF; whereas, when the two switches are ON, the same quarter-wave transformer will reconfigure for concurrent dual-band operation at 900 MHz and 2100 MHz. Thus, this dual-band transformer can effectively cover operation at four frequencies while operating simultaneously at two bands for carrier aggregation applications. For validation, this transformer is used to implement reconfigurable concurrent dual-band Wilkinson power divider/combiner at these frequencies.
{"title":"Design of reconfigurable concurrent dual-band quarter-wave transformer with application of power combiner/divider","authors":"R. Kalyan, K. Rawat, S. Koul","doi":"10.1109/IMARC.2015.7411429","DOIUrl":"https://doi.org/10.1109/IMARC.2015.7411429","url":null,"abstract":"This paper presents the analysis and design of reconfigurable concurrent dual-band quarter-wave transformer using two single pole single throw Micro-Electro-Mechanical Switches. The transformer will behave as concurrent dual-band quarter-wave transmission line at 800 MHz and 1800 MHz, when both the switches are OFF; whereas, when the two switches are ON, the same quarter-wave transformer will reconfigure for concurrent dual-band operation at 900 MHz and 2100 MHz. Thus, this dual-band transformer can effectively cover operation at four frequencies while operating simultaneously at two bands for carrier aggregation applications. For validation, this transformer is used to implement reconfigurable concurrent dual-band Wilkinson power divider/combiner at these frequencies.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128577129","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 : 1900-01-01DOI: 10.1109/imarc.2015.7411412
Girish Chandra Tripathi, Praveen Jaraut, M. Rawat, L. N. Reddy
This paper presents the practical implementation of digital predistortion (DPD) for power amplifier along with the transmitter and receiver diversity techniques for multiple inputs multiple outputs (MIMO) communication to enhance channel capacity and increased coverage. The MIMO diversity techniques are implemented in a Xilinx Zynq 7000 FPGA to drive wideband RF transceiver AD9361. In addition, DPD is applied to compensate for amplifier nonlinearity in each MIMO branch for 4G, 10 MHz LTE signal.
{"title":"Digital predistortion of power amplifiers with diversity technique in 4G MIMO transceivers","authors":"Girish Chandra Tripathi, Praveen Jaraut, M. Rawat, L. N. Reddy","doi":"10.1109/imarc.2015.7411412","DOIUrl":"https://doi.org/10.1109/imarc.2015.7411412","url":null,"abstract":"This paper presents the practical implementation of digital predistortion (DPD) for power amplifier along with the transmitter and receiver diversity techniques for multiple inputs multiple outputs (MIMO) communication to enhance channel capacity and increased coverage. The MIMO diversity techniques are implemented in a Xilinx Zynq 7000 FPGA to drive wideband RF transceiver AD9361. In addition, DPD is applied to compensate for amplifier nonlinearity in each MIMO branch for 4G, 10 MHz LTE signal.","PeriodicalId":307742,"journal":{"name":"2015 IEEE MTT-S International Microwave and RF Conference (IMaRC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134343988","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：