Jayanta Mukherjee

Bio: Jayanta Mukherjee is an academic researcher from Indian Institute of Technology Bombay. The author has contributed to research in topics: Antenna (radio) & Dipole antenna. The author has an hindex of 20, co-authored 154 publications receiving 1351 citations. Previous affiliations of Jayanta Mukherjee include Indian Institutes of Technology & Ohio State University.

Hemispherical Dielectric Resonator Antenna embedded in a novel Sierpinski Carpet Fractal based Photonic Band Gap structure for wideband systems

Abstract: In this paper, a novel Sierpinski Carpet Fractal based Photonic Band Gap (PBG) structure is proposed. The parasitic holes drilled to form the fractal geometry improve the band gap performance. The application of the novel PBG on Hemispherical Dielectric Resonator Antenna (HDRA) improves the impedance bandwidth of operation (S 11 <;-10 dB) from 10.4 % to 21% at 1.82 GHz. The antenna is excited by a simple coaxial probe at an offset and the broadband is observed for the TE 111 mode of the HDRA. The efficiency is above 90% for the entire bandwidth of operation. The peak gain of the proposed structure is 6.4 dBi at 2 GHz.

Dual-Band Filter for WiMAX and WLAN with Improved Upper Stop Band Performance

Abstract: In this paper, a novel and compact dual-band fllter with enhanced upper stop characteristics has been presented. Dual band pass fllter characteristics are achieved by introducing transmission zero (TZ) in pass band of band pass fllter (BPF). The wide band pass fllter (BPF) is implemented by combining low pass fllter characteristics (i.e., stepped impedance resonator) and high pass fllter characteristics (i.e., short stubs). Closed rectangular ring resonator (CRRR) and open loop rectangular ring (OLRR) combination is used to produce two transmission zeros (TZs). One TZ is placed on the pass band of BPF such that resultant fllter characteristic consists of two pass band. However, the second TZ is placed at edge of the pass band in BPF to improve skirt selectivity. The two pass bands are designed to cover two popular wireless bands namely WiMAX (center frequency f1 (3.5GHz) and WLAN (center frequency f2 (5.7GHz)) bands, i.e., 3.35{3.65GHz and 5.5{5.85GHz respectively. Equi-ripple low pass stepped impedance resonator (SIR) fllter response is responsible for improved and spurious free upper stop band (> 20GHz, i.e., > 6f1) and also provides sharp skirt attenuation at upper stop band. The proposed fllter is implemented on an RT/Duroid 5880 ("r = 2:2) substrate with thickness of 0.785mm and surface area of 19 £ 12sq ¢ mm. Good agreement between simulated and measured results ensures that the proposed fllter is a suitable candidate for modern dual band communications.

Spurious free independently controllable compact quad-band filter using folded T-shaped stub loaded modified ring resonator

Abstract: A compact spurious free, quad-band, band-pass filter (BPF) having independently controllable and widely spaced frequency bands is proposed. The design consists of a basic BPF to which the authors introduce transmission zeros (TZs) in the frequency response using T-shaped stubs loaded with a modified ring resonator (MRR) thereby creating the four passbands. This design results in very high band-to-band isolation. The TZs are obtained by transversal signal path cancellation and also due to the loaded T-shaped stubs. The BPF consists of a stepped impedance low-pass filter which provides spurious free out of band characteristics up to 20 GHz. By changing the tapping position of the MRR, the frequencies of the TZs can be adjusted to get the desired pass band characteristics. The proposed quad-band filter provides low-insertion loss (<1 dB) at the four passbands centred at 2.4, 5.1, 7.7 and 10.1 GHz. The simulation results of the filter are verified experimentally.

Dual band dual polarized frequency reconfigurable antenna using meta-surface

Abstract: A frequency re-configurable dual band dual polarized antenna is proposed. This consists of a rectangular feed patch layer and two MS layers of same thickness. MS layers are made of rectangular loop based unit cells periodically placed in both X and Y direction. The total profile of the antenna is 0.07 λ0 only. Simulation result shows that the operating frequency of the antenna can be changed by physically rotating both the MS layers with respect to the centre of the patch antenna. As the MS is rotated the excitation and the polarization with the electric field of the patch to the MS layers change which changes the effective permittivity of the whole substrate and hence the frequency of the operation also changes. Measured results are well matched with the simulation results. At all the frequencies antenna has peak gain of more than 5.5 dB and the minimum efficiency is more than 89%.

Design Of Analog Cmos Integrated Circuits

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Response to FCC 98-208 notice of inquiry in the matter of revision of part 15 of the commission's rules regarding ultra-wideband transmission systems

Abstract: In general, Micropower Impulse Radar (MIR) depends on Ultra-Wideband (UWB) transmission systems. UWB technology can supply innovative new systems and products that have an obvious value for radar and communications uses. Important applications include bridge-deck inspection systems, ground penetrating radar, mine detection, and precise distance resolution for such things as liquid level measurement. Most of these UWB inspection and measurement methods have some unique qualities, which need to be pursued. Therefore, in considering changes to Part 15 the FCC needs to take into account the unique features of UWB technology. MIR is applicable to two general types of UWB systems: radar systems and communications systems. Currently LLNL and its licensees are focusing on radar or radar type systems. LLNL is evaluating MIR for specialized communication systems. MIR is a relatively low power technology. Therefore, MIR systems seem to have a low potential for causing harmful interference to other users of the spectrum since the transmitted signal is spread over a wide bandwidth, which results in a relatively low spectral power density.

Gain enhancement methods for printed circuit antennas

Abstract: Resonance conditions for a substrate-superstrate printed antenna geometry which allow for large antenna gain are presented. Asymptotic formulas for gain, beamwidth, and bandwidth are given, and the bandwidth limitation of the method is discussed. The method is extended to produce narrow patterns about the horizon, and directive patterns at two different angles.

Design Of Integrated Circuits For Optical Communications

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The Design of CMOS Radio-Frequency Integrated Circuits: RF CIRCUITS THROUGH THE AGES

Abstract: This expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems. The chapters on low-noise amplifiers, oscillators and phase noise have been significantly expanded as well. The chapter on architectures now contains several examples of complete chip designs that bring together all the various theoretical and practical elements involved in producing a prototype chip. First Edition Hb (1998): 0-521-63061-4 First Edition Pb (1998); 0-521-63922-0