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Microwave and Optical Technology Letters 08/2013; 55(8). · 0.62 Impact Factor
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IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Lake Buena Vista, Florida, USA; 07/2013
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IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Lake Buena Vista, Florida, USA; 07/2013
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ABSTRACT: In this letter, an annular shape microstrip feed is presented, which has been used to excite a hybrid mode in ring dielectric resonator antenna. The proposed feed for ring dielectric resonator antenna has been achieved 10 dB impedance bandwidth of 66.72% at the center frequency of 5.35 GHz. The operating frequency range of the antenna is 3.49 GHz – 7.20 GHz. The radiation patterns are consistent throughout the operational bandwidth. A stable average measured gain of about 4.31 dB has been obtained over the operating band, which is suitable for wideband wireless system applications. A prototype is fabricated and measured. The simulated and measured results are in good agreement.
IEEE Antennas and Wireless Propagation Letters 05/2013; 12(1):595-598. · 1.37 Impact Factor
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ABSTRACT: A two-layer embedded half-split dielectric resonator antenna is proposed in this paper for wideband application. To enhance the impedance bandwidth, a small half-split cylindrical dielectric resonator is placed concentrically inside the large annular-ring half-split dielectric resonator. The effect of antenna parameters such as layer arrangement, geometrical parameters and probe length are investigated. The proposed antenna provides the impedance bandwidth of 88.25% (at resonance frequency of 7.41 GHz) from 5.55 to 12.08 GHz for reflection coefficient (S11) less than −10dB. The average gain of proposed antenna is 8.35 dB in the frequency range of 5.55 to 12.08 GHz.
42th IEEE European Microwave Conference (EuMC), Amsterdam, Netherlands; 02/2013
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ABSTRACT: In this paper, a novel dual-band hexagonal patch antenna coupled with complementary split ring resonator (CSRR) is proposed and analyzed. The complementary split ring resonator is etched at ground plane (underneath the hexagonal patch). It is observed from the simulation that the first band corresponds to CSRR while second band due to hexagonal patch. The proposed antenna exhibits -10 dB bandwidth of 154 MHz from 3.203 GHz-3.357 GHz and bandwidth of 180 MHz from 5.140 GHz-5.320 GHz for first and second band respectively. The average gain at the two bands is 6.70 dB and 5.42 dB.
IEEE Asia-Pacific Microwave Conference (APMC 2012), Kaohsiung, Taiwan.; 01/2013
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Microwave and Optical Technology Letters 12/2012; Accepted. · 0.62 Impact Factor
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2012 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting; 07/2012
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3rd Indian Antenna Week (IAW) Conference; 05/2012
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5th Antenna Test & Measurement Society (ATMS) Conference., Mumbai, India.; 01/2012
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5th Antenna Test & Measurement Society (ATMS) Conference, Mumbai, India.; 01/2012
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IET Microwaves Antennas & Propagation 01/2012; · 0.68 Impact Factor
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ABSTRACT: This paper presents a single stage low-noise amplifier (LNA) using cascode topology for low-power UWB applications. Resistive feedback is used to obtain large bandwidth. The LNA achieves peak gain of 11.8 dB and noise figure varying from 1.72 - 3.62 dB within the band of 3.1 - 10.6 GHz. The LNA uses supply of 2 V while consuming only 6 mW of dc power. The technology used for design is 0.25 μm IHP SiGe BiCMOS which employs Heterojunction Bipolar Transistor (HBT). The output 1 dB compression point and input IP3 for LNA are -23 dBm and -12.48 dBm respectively.
Communications (NCC), 2011 National Conference on; 03/2011
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ABSTRACT: The main objective of the present study is to improve the bandwidth of the dielectric resonator antenna (DRA). A new four-element multilayer cylindrical dielectric resonator antenna (MCDRA) array above the ground plane is proposed here. MCDRA is easy to design and excited with HE<sub>11δ</sub> mode excited in each MCDRA by centrally placed dielectric resonator in which TM<sub>01δ</sub> mode excited. The effect of design parameters such as permittivity of materials, probe height and arrangement of dielectric layers are investigated and the excited modes (i.e. TM<sub>01δ</sub> and HE<sub>11δ</sub>) are also been confirmed by simulations. The simulation is performed on Ansoft's HFSS package. The proposed multilayer cylindrical dielectric resonator antenna (MCDRA) can offer an impedance bandwidth of ~47% for the return loss below -10dB where frequency range is from 4.06 to 6.07 GHz and resonance frequency is 4.3 GHz with monopole like radiation pattern and it is stable in the passband with 4.73 dB gain.
Communications (NCC), 2011 National Conference on; 03/2011
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ABSTRACT: A highly linear 600 MHz centre frequency, 500 MHz bandwidth 6<sup>th</sup> order Butterworth bandpass filter using a Leap-Frog Gm-C topology is designed. Fully differential inverter based Operational Transconductance Amplifier (OTA) with common-mode feedback (CMFB) and common-mode feed forward (CMFF) circuit is used in the design. Cadence tool has been used on IHP SiGe BiCMOS 0.25 μm node. The filter consumes power of 44.87 mW.
Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on; 01/2011
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17th National Conference on Communications (NCC), IISc Bangalore, India; 01/2011
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41th European Microwave Conference, Manchester, U.K.; 01/2011
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41th European Microwave Conference, Manchester, U.K.; 01/2011
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IEEE Applied Electromagnetics conference (AEMC) and Indian Antenna Week (IAW), Kolkata, India.; 01/2011
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Progress In Electromagnetics Research (PIER) B. 01/2011; 30:135-156.
