Circuits and Active Antennas for Ultra-Wide Band Pulse Generation and Transmission

Kumar, Mithilesh; Basu, Ananjan; Koul, Shiban K.

doi:10.2528/pierb10052103

Cited by 12 publications

(8 citation statements)

References 18 publications

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“…[9][10][11][12][13][14][15][16][17][18], but some time domain characterization is also reported [7,8]. Till now the effect of incorporating a bandnotch on the pulse-shape has not been experimentally investigated although this has been simulated [19][20][21]. These simulated results do not necessarily give a good indication of experimental results because the pulse generating circuit may perform differently depending on the load characteristics.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Antenna With Band Reject Capability and Its Characterization in Time Domain

Bazaz¹,

Koul²,

Kumar³

et al. 2011

PIER C

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In this paper a square monopole antenna has been proposed which can be used for Ultra Wideband applications. Bandnotch performance is introduced by an E-shaped slot on the patch. The dimensions are optimized to give not only the usual 3-10 GHz bandwidth with rejection in the 5-6 GHz band which is commonly used for WLAN, but also short received pulse duration when transmitted and received using a pair of these antennas. The demonstration of short received pulse-width is the primary novelty reported. The performance is verified by time domain measurements, in addition to the usual antenna characterization.

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Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Antenna With Band Reject Capability and Its Characterization in Time Domain

Bazaz¹,

Koul²,

Kumar³

et al. 2011

PIER C

Self Cite

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“…In nonlinear inverse scattering, the sensors as antennas are required for the measurements [8]. We also need a large dataset and dielectric properties of the scattering medium.…”

Section: Discussionmentioning

confidence: 99%

“…In majority of inverse scattering algorithms, the illumination of an object or medium is done by an incident wave which may be generated by an array of antennas or an ultra-wideband pulse [8]. For analyzing we need a setup to use time domain solver [1].…”

Section: Time Domain Algorithm For First Order Susceptibilitymentioning

confidence: 99%

Parameter Estimation of an Inhomogeneous Medium by Scattered Electromagnetic Fields Using Nonlinear Optics and Wavelets

Khulbe¹,

Parthasarathy²,

Tripathy³

2018

PIER C

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The aim of this work is to study the parameter estimation of a nonlinear medium in terms of scattered electromagnetic fields. The surface parameters are defined in terms of linear and nonlinear components of susceptibility and permeability. A set of Maxwell's equations are derived for an inhomogeneous medium using Green's function and the scattered Electromagnetic fields solving integrodifferential equations. Mathematical formulas are simplified using wavelet based method. Susceptibility and permeability is assumed as a function of wavelet basis. For parameter estimation, least square method and inner product methods are used with wavelets as a basis function, which gives solutions for nonlinear integrodifferential equation. Both time and spatial domain analysis is done using wavelets, and parameter coefficients are obtained. It is found that in both the parameter estimation methods, least square estimation gives better results. At the end of the paper statistical analysis of the scattered signals is included by calculating the mean and covariance of the signals.

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“…a single system. To integrate different wireless communication standards in a single portable antenna system, various narrow band, wideband, ultra-wideband (UWB), dual-band and multiband, antennas are developed [8][9][10][11]. However, to mitigate the electromagnetic interference (EMI) due to existence of other nearby communication systems, the multiband antennas are preferred over ultra-wideband antennas.…”

mentioning

confidence: 99%

Miniaturized Slotted Ground Uwb Antenna Loaded With Metamaterial for Wlan and Wimax Applications

Saraswat¹,

Kumar²

2016

PIER B

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This paper presents a miniaturized ultra wideband (UWB) antenna with metamaterial for WLAN and WiMax applications. For miniaturization of UWB antenna resonating 3.1-10.6 is designed Ghz using fractalization of the radiating edge and slotted ground structure approach. A miniaturization of active patch area and antenna volume is achieved up to 63.48% and 42.24% respectively, with respect to the conventional monopole UWB antenna. This antenna achieves a 143% impedance bandwidth covering the frequency band from 2.54 GHz to 15.36 GHz under simulation and 132% (2.95-14.28 GHz) in measurement. The electrical dimension of this antenna is 0.32λ × 0.32λ (38 mm×38 mm) at lower frequency of 2.54 GHz. As per IEEE 802.11a/b/g and IEEE 802.16e standards, GHz), WiMAX (3.3-3.8 GHz) bands are achieved by using slotted ground structure and metamaterial rectangular split ring resonator. The proposed antenna is fabricated on FR4 substrate of thickness 1.6 mm and a dielectric constant 4.3 and tested. The proposed antenna yields a −10 dB impedance bandwidth of about 11.1% (2.39-2.67 GHz), 59.1% (2.87-5.28 GHz) and 7.4% (5.58-6.01 GHz) under simulation and 4.5% (2.41-2.52 GHz), 51.1% (3.12-5.26 GHz) and 3.8% (5.69-5.91 GHz) in measurement for 2.4, 3.5 & 5 and 5.8 GHz bands respectively. Stable radiation patterns with low cross polarization, high average antenna gain of 3.02 dBi under simulation and 2.14 dBi in measurement and measured peak average radiation efficiency of 76.6% are observed for the operating bands. Experimental results seem in good agreement with the simulated ones of the proposed antenna.

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Circuits and Active Antennas for Ultra-Wide Band Pulse Generation and Transmission

Cited by 12 publications

References 18 publications

An Ultra-Wideband Antenna With Band Reject Capability and Its Characterization in Time Domain

An Ultra-Wideband Antenna With Band Reject Capability and Its Characterization in Time Domain

Parameter Estimation of an Inhomogeneous Medium by Scattered Electromagnetic Fields Using Nonlinear Optics and Wavelets

Miniaturized Slotted Ground Uwb Antenna Loaded With Metamaterial for Wlan and Wimax Applications

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