scholarly journals An IR-UWB Transmitter using Pulse Injection

2019 ◽  
Vol 17 (2) ◽  
pp. 109-119
Author(s):  
Nontapat Channarong ◽  
Kritsapon Leelavattananon
Keyword(s):  
Pulse Shaping ◽  
Pulse Generator ◽  
Low Frequency ◽  
Rectangular Pulse ◽  
Ultra Wideband ◽  
Rfid Tags ◽  
Cmos Process ◽  
Side Band ◽  
Sensor Applications ◽  
Shaping Technique

This work presents a new pulse-shaping technique for an impulse-radio ultra-wideband (IR-UWB) transmitter which is intended for RFID tags and wireless sensor applications. The proposed pulse is derived from a rectangular pulse with its side-band energy suppressed in order to satisfy the FCC UWB regulation, in particular at low frequency band (3.1 - 4.8 GHz). To verify its effectiveness, the new pulse generator was designed in a 180-µm CMOS process. The simulation results indicate that the spectrum of the transmitted pulse can be fitted within the FCC UWB spectral mask. The total circuit consumes 926 µW at a 10 MHz pulse repetitive frequency (PRF).

scholarly journals An integrated 3.1–5.1 GHz pulse generator for ultra-wideband wireless localization systems

2006 ◽  
Vol 4 ◽  
pp. 247-250 ◽  
Author(s):  
X. Fan ◽  
G. Fischer ◽  
B. Dietrich
Keyword(s):  
Communication Systems ◽  
Pulse Shaping ◽  
Pulse Generator ◽  
Supply Voltage ◽  
Ultra Wideband ◽  
Center Frequency ◽  
Total Power ◽  
Gaussian Filter ◽  
Bicmos Technology ◽  
Total Power Consumption

Abstract. This paper presents an implementation of an integrated Ultra-wideband (UWB), Binary-Phase Shift Keying (BPSK) Gaussian modulated pulse generator. VCO, multiplier and passive Gaussian filter are the key components. The VCO provides the carrier frequency of 4.1 GHz, the LC Gaussian filter is responsible for the pulse shaping in the baseband. Multiplying the baseband pulse and the VCO frequency shifts the pulse to the desired center frequency. The generated Gaussian pulse ocupppies the frequency range from 3.1 to 5.1 GHz with the center frequency at 4.1 GHz. Simulations and measured results show that this spectrum fulfills the mask for indoor communication systems given by the FCC (Federal Communications Commission, 2002). The total power consumption is 55 mW using a supply voltage of 2.5 V. Circuits are realized using the IHP 0.25 μm SiGe:C BiCMOS technology.

An Improved Ultra-Wideband, Ultra-Short Monocycle Pulse Generator

2012 ◽  
Vol 588-589 ◽  
pp. 781-784
Author(s):  
Bi Shang Liu ◽  
Jian Ming Zhou ◽  
Ju Zhou
Keyword(s):  
Transmission Line ◽  
Pulse Width ◽  
Pulse Shaping ◽  
Pulse Generator ◽  
Short Circuit ◽  
Schottky Diodes ◽  
Simulation Software ◽  
Ultra Wideband ◽  
Microstrip Transmission Line ◽  
Generator Circuit

This paper presents an improved ultra-wideband monocycle pulse generator circuit based on step recovery diode. This pulse generator circuit uses short-circuit microstrip transmission line to generate the Gaussian pulse the monocycle pulse. The improved pulse-shaping network employs two schottky diodes and a MESFET to suppress the pulse ringing. The SRD model was built in RF simulation software ADS, and then the design and simulation of the pulse generator circuit was accomplished using this model. The experiments showed an monocycle pulse of 400ps pulse width with good symmetry. The measured results agreed with the simulation.

A Bargraph IR-UWB pulse generator with Adaptive PSD for medical applications using a 130nm CMOS Process

2019 ◽  
Author(s):  
Luiz Carlos Moreira ◽  
Jose Fontebasso Neto ◽  
Walter Silva Oliveira ◽  
Elizabeth Fernandez ◽  
Ebert San Roman Castillo
Keyword(s):  
Pulse Generator ◽  
Medical Applications ◽  
Cmos Process

scholarly journals A Compact Four-Port Coplanar Antenna Based on an Excitation Switching Reconfigurable Mechanism for Cognitive Radio Applications

2019 ◽  
Vol 9 (15) ◽  
pp. 3157 ◽  
Author(s):  
O ◽  
Jin ◽  
Choi
Keyword(s):  
Cognitive Radio ◽  
High Frequency ◽  
Coplanar Waveguide ◽  
Low Frequency ◽  
Loop Antenna ◽  
Ultra Wideband ◽  
Frequency Range ◽  
Uwb Antenna ◽  
High Isolation ◽  
Loop Antennas

In this paper, we propose a compact four-port coplanar antenna for cognitive radio applications. The proposed antenna consists of a coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna and three inner rectangular loop antennas. The dimensions of the proposed antenna are 42 mm × 50 mm × 0.8 mm. The UWB antenna is used for spectrum sensing and fully covers the UWB spectrum of 3.1–10.6 GHz. The three loop antennas cover the UWB frequency band partially for communication purposes. The first loop antenna for the low frequency range operates from 2.96 GHz to 5.38 GHz. The second loop antenna is in charge of the mid band from 5.31 GHz to 8.62 GHz. The third antenna operates from 8.48 GHz to 11.02 GHz, which is the high-frequency range. A high isolation level (greater than 17.3 dB) is realized among the UWB antenna and three loop antennas without applying any additional decoupling structures. The realized gains of the UWB antenna and three loop antennas are greater than 2.7 dBi and 1.38 dBi, respectively.

Vibronic side bands of Sm2+ in alkali halides

1969 ◽  
Vol 47 (17) ◽  
pp. 1757-1767 ◽  
Author(s):  
M. Buchanan ◽  
E. J. Woll Jr.
Keyword(s):  
Low Frequency ◽  
Alkali Halides ◽  
Frequency Region ◽  
Defects In Crystals ◽  
Side Band

The calculation of vibronic side bands of defects in crystals is discussed. A model for the deformation of the lattice about a Sm2+ defect in alkali halides and side-band calculations on this model for KBr and KCl containing Sm2+ are compared with experimentally observed side bands. Improvements, particularly in the low frequency region, are found over the calculations assuming no deformation.

Ultra-Wideband Aperture Array Element Design for Low Frequency Radio Astronomy

2011 ◽  
Vol 59 (6) ◽  
pp. 1808-1816 ◽  
Author(s):  
Eloy de Lera Acedo ◽  
Nima Razavi-Ghods ◽  
Luis Enrique Garcia ◽  
Peter Duffett-Smith ◽  
P. Alexander
Keyword(s):  
Radio Astronomy ◽  
Low Frequency ◽  
Array Element ◽  
Ultra Wideband ◽  
Aperture Array
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