scholarly journals Simulation and manufacturing of modified circular monopole microstrip antenna for UWB applications

2021 ◽  
Vol 10 (1) ◽  
pp. 70
Author(s):  
Bilal S. Taha ◽  
Hamzah M. Marhoon
Keyword(s):  
Computer Simulation ◽  
Microstrip Antenna ◽  
High Speed ◽  
Reasonable Agreement ◽  
Ultra Wideband ◽  
Simulation Process ◽  
High Speed Data ◽  
Simulation Results ◽  
Compact Design ◽  
Uwb Applications

Ultra-wideband (UWB) technology is one of the most promising wireless communication solutions to be developed quickly because of the high-speed data, wide bandwidth and excellent immunity to multipath interference. In this work, the compact design of a modified circular monopole microstrip antenna is simulated and manufactured for the UWB applications. The simulation process of the proposed antenna was done based on the finite integration of the Computer Simulation Technology (CST) Microwave Studio (MWS). The proposed antenna comprises a copper radiating patch, Roger’s Kappa-438 substrate, and a single stub act as a reflector. The simulation results showed a reasonable agreement with the results of the measurement and good performance was achieved in the range from 1.8 to 10 GHz with VSWR less than 2.0.

scholarly journals A Circular Disc Microstrip Antenna with Dual Notch Band for GSM/Bluetooth and Extended UWB Applications

2018 ◽  
Vol 7 (2.16) ◽  
pp. 11
Author(s):  
Sanjeev Kumar ◽  
Ravi Kumar ◽  
Rajesh Kumar Vishwakarma
Keyword(s):  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Circular Disc ◽  
Ultra Wideband ◽  
Resonant Circuit ◽  
Frequency Range ◽  
Notch Band ◽  
Uwb Applications ◽  
Ku Band

A microstrip antenna with a circular disc design and modified ground is proposed in this paper. Circular shapes of different size have been slotted out from the radiating patch for achieving extended ultra wideband (UWB) with GSM/Bluetooth bands with maximum bandwidth of 17.7 GHz (0.88-18.6 GHz). Further, characteristic of dual notch band is achieved, when a combination of T and L-shaped slots are etched into the circular disc and ground plane respectively. Change in length of slots is controlling the notch band characteristics. The proposed antenna has rejection bandwidth of 1.3-2.2 GHz (LTE band), 3.2-3.9 GHz (WiMAX band) and 5.2-6.1 GHz (WLAN band) respectively. It covers the frequency range of 0.88-18.5 GHz with the VSWR of less than 2. Also, an equivalent parallel resonant circuit has been demonstrated for band notched frequencies of the designed antenna. The gain achieved by the proposed antenna is 6.27 dBi. This antenna has been designed, investigated and fabricated for GSM, Bluetooth, UWB, X and Ku band applications. The stable gain including H & E-plane radiation pattern with good directivity and omnidirectional behavior is achieved by the proposed antenna. Measured bandwidths are 0.5 GHz, 0.8 GHz, 1.1 GHz and 11.7 GHz respectively. 

Study of BLAST Signal Detection Algorithm in LTE System

2013 ◽  
Vol 756-759 ◽  
pp. 3183-3188
Author(s):  
Tao Lei ◽  
Deng Ping He ◽  
Fang Tang Chen
Keyword(s):  
Signal Detection ◽  
High Speed ◽  
Data Communication ◽  
Detection Algorithm ◽  
Detection Performance ◽  
Detection Algorithms ◽  
High Speed Data ◽  
Simulation Results ◽  
Better Than

BLAST can achieve high speed data communication. Its signal detection directly affects performance of BLAST receiver. This paper introduced several signal detection algorithmsZF algorithm, MMSE algorithm, ZF-SIC algorithm and MMSE-SIC algorithm. The simulation results show that the traditional ZF algorithm has the worst performance, the traditional MMSE algorithm and the ZF-SIC algorithm is similar, but with the increase of the SNR, the performance of ZF-SIC algorithm is better than MMSE algorithm. MMSE-SIC algorithm has the best detection performance in these detection algorithms.

scholarly journals RADIO ACCESS NETWORK REQUIREMENT FOR NEW DEPLOYMENT OF WIMAX IN DHAKA

2016 ◽  
pp. 175-179
Author(s):  
Tawhid Kawser ◽  
MOHAMMED R. AL-AMIN ◽  
KHONDOKER Z. ISLAM ◽  
SIFAT-E- MOHAMMAD
Keyword(s):  
High Speed ◽  
Access Network ◽  
Mobile Wimax ◽  
Radio Network ◽  
Planning Tool ◽  
Radio Access ◽  
High Speed Data ◽  
Simulation Results ◽  
Radio Planning

Mobile WiMAX is expected to be the next generation radio-interface, complementing WLAN and challenging EVDO/HSPA/LTE. High speed data rate, reduced latency, better Quality of service, and mobility can allow WiMAX to meet the rapidly growing demand of the users. A study of WiMAX Radio Network Planning (RNP) for an urban area like Dhaka city in Bangladesh is presented in this paper in order to help predetermine the radio access infrastructure requirements. A suitable radio planning tool has been used for this purpose. The simulation results of throughput and Carrier to Interference plus Noise Ratio (CINR) are provided.

Circular Slotted Antenna with CPW feed for GSM and UWB Applications

2020 ◽  
Vol 10 ◽  
Author(s):  
Sanjeev Kumar ◽  
Ravi Kumar ◽  
Durgesh Nandan
Keyword(s):  
Surface Area ◽  
Microstrip Antenna ◽  
Coplanar Waveguide ◽  
Ultra Wideband ◽  
Antenna Structure ◽  
Antenna Size ◽  
Uwb Antennas ◽  
Military Applications ◽  
Slotted Antenna ◽  
Uwb Applications

Background & Objective: The circular slotted monopole microstrip antenna with Coplanar Waveguide (CPW) feed for unified GSM and Ultra-Wideband (UWB) applications have been presented in this article. Circular shaped slots have been embedded in the radiating patch. Less surface area has been found due to slots etching and the overall antenna size is reduced by 45%. Result: The proposed antenna demonstrates a double band operation wrapping 883.6-1206 MHz (GSM band) and 2.75-18.30 GHz (UWB, X, and Ku) frequency band with VSWR of less than 2 and fractional B. W. of 30.8 % and 147% respectively. The pattern of radiation presented by the antenna is nearly omnidirectional in H-plane and directional in E-plane within the GSM and UWB band. Conclusion: There is a variety of applications nowadays using these UWB antennas such as modern civil and military applications, wireless and radar communications, etc. Measured results are presented to validate the proposed antenna structure, which shows that the proposed designed antenna structure has a stable radiation pattern both at the GSM and UWB band ranges.

scholarly journals Highly Compact Design of Trimmed Patch with Modified Partial Ground Structure for Extreme-Wideband Systems

2017 ◽  
Vol 7 (5) ◽  
pp. 1918-1921
Author(s):  
H. Alsaif
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Substrate Material ◽  
Ultra Wideband ◽  
Operating Frequency ◽  
Radiation Characteristics ◽  
Total Size ◽  
Compact Design ◽  
Uwb Applications ◽  
Wide Operating

In this paper, a novel highly compact microstrip monopole antenna with adjusted ground plane for ultra-wideband (UWB) applications is proposed. The patch antenna is composed of a trimmed radiator and rectangular ground plane with four slots providing relatively extreme wide operating frequency from 2.8 till 16.2 GHz based on -10 dB criteria. The high matching impedance in the design results in ultra-wide bandwidth that covers the entire BW allocated by FCC for UWB applications. At the same time, the presented antenna is distinguished by significantly miniaturized structure with total size of 13 mm x 10 mm printed on a substrate material of Rogers Duriod RT 5880 LZ with relative permittivity of εr=1.9 and loss tangent δ of 0.0009. The suggested antenna is appropriate for miniature wireless gadgets. The patch has been investigated, and optimized in terms of operating frequency, impedance matching, radiation characteristics, structure size, and fabrication cost.

An octagonal ultra-wideband double slit antenna for WiMAX and WLAN rejection

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bhakkiyalakshmi Ramakrishnan ◽  
Vasanthi Murugiah Sivashanmugham
Keyword(s):  
Microstrip Antenna ◽  
Ultra Wideband ◽  
Dual Band ◽  
Frequency Range ◽  
Fractional Bandwidth ◽  
Microstrip Patch ◽  
Rectangular Slit ◽  
Uwb Applications ◽  
The Right ◽  
Peak Gain

Abstract This article proposes a dual band rejected double slits-based planar octagonal microstrip antenna for Ultra-Wideband (UWB) applications. The antenna built by an edge trimmed partial ground and an octagonal microstrip patch with a horizontal and an inclined rectangular slit. The slits are made to remove the interfering frequency bands WiMAX and WLAN from UWB band. The designed antenna without slits operates on the frequency range 2.78–10.78 GHz with a fractional bandwidth of 119% which includes the UWB frequency band 3.1–10.6 GHz. The antenna with diagonal inclined slit notches the band 4.4–5.83 GHz which excluded WLAN frequency range and shift the starting frequency of UWB band to the right from 2.78 to 3.26 GHz. The antenna with both horizontal and inclined slits further shifts the starting frequency from 3.26 to 3.619 GHz, eliminating the WiMAX band. The excluded bands show the VSWR value greater than 2 dBi whereas the rest of the band has less than 2 dBi. The proposed antenna results in nearly omnidirectional radiation pattern, 6.2 dBi peak gain and 85% radiation efficiency.

Compact Design of High-Speed Low-Error Four-Quadrant Current Multiplier with Reduced Power Dissipation

2019 ◽  
Vol 29 (03) ◽  
pp. 2050038
Author(s):  
Mohammad Moradinezhad Maryan ◽  
Seyed Javad Azhari ◽  
Mehdi Ayat ◽  
Reza Rezaei Siahrood
Keyword(s):  
High Speed ◽  
Harmonic Distortion ◽  
Cmos Technology ◽  
Monte Carlo Analysis ◽  
Saturation Region ◽  
Static Power ◽  
Linearity Error ◽  
Simulation Results ◽  
Compact Design ◽  
Four Quadrant

In this paper, a compact low-power, high-speed, low-error four-quadrant analog multiplier is proposed using a new simple current squarer circuit. The new squarer circuit consists of an NMOS transistor, which operates in saturation region, plus a resistor. The proposed multiplier has a balanced structure composed of four squarer cells and a simple current mirror. This multiplier also has the important property of not using bias currents which results in greatly reduced power. The performance of the proposed design (for passive and active realization of the resistors) has been simulated using HSPICE software in 0.18[Formula: see text][Formula: see text]m TSMC (level-49) CMOS technology. Simulation results with [Formula: see text]-V DC supply voltages show (for passive realization) that the maximum linearity error is 0.35%, the [Formula: see text][Formula: see text]dB bandwidth (BW) is 903[Formula: see text]MHz, the total harmonic distortion (THD) is 0.3% (at 1[Formula: see text]MHz), and the maximum and static power consumption are [Formula: see text]W and [Formula: see text]W, respectively. Also, post-layout simulation results are extracted, which give the maximum linearity error as 0.4%, the [Formula: see text][Formula: see text]dB BW as 657[Formula: see text]MHz and the THD as 0.35%, as well. Moreover, Monte Carlo analysis are performed to verify the satisfactory robustness and reliability of the proposed work’s performance.

scholarly journals Systematization of the Simulation Process of Transformer Inrush Current Using EMTP

2019 ◽  
Vol 9 (12) ◽  
pp. 2398 ◽  
Author(s):  
Hun-Chul Seo ◽  
Gi-Hyeon Gwon
Keyword(s):  
Computer Simulation ◽  
Computer Simulations ◽  
Electromagnetic Transients ◽  
Inrush Current ◽  
Large Magnitude ◽  
Test Report ◽  
Protection Relay ◽  
Simulation Process ◽  
System Operator ◽  
Simulation Results

An inrush current is generated when a transformer is energized. This current has a large magnitude and rich harmonics, thereby causing mal-operation of the protection relay. Therefore, the development of countermeasures against inrush current is necessary, and this study has been performed by computer simulations. However, it is difficult for a power system operator to perform a computer simulation as it is difficult to determine what data should be selected and entered. Therefore, this paper establishes the simulation process of transformer inrush current using the Electromagnetic Transients Program (EMTP). Two methods to simulate the transformer inrush current are described in detail. Based on the actual 154 kV transformer test report in Korea, the simulation results of the inrush current using the two methods are discussed.

A GAUSSIAN MONOCYCLE PULSE GENERATOR/MODULATOR FOR UWB RADIOS APPLICATIONS

2014 ◽  
Vol 23 (05) ◽  
pp. 1450060 ◽  
Author(s):  
LEONARDO PANTOLI ◽  
VINCENZO STORNELLI
Keyword(s):  
Pulse Generator ◽  
Low Voltage ◽  
Low Complexity ◽  
Cmos Technology ◽  
Ultra Wideband ◽  
Repetition Time ◽  
Simulation Results ◽  
Uwb Applications ◽  
Uwb Radio ◽  
Circuit Power

In this paper, we present, at transistor level, a very low complexity Gaussian monocycle pulse generator/modulator for DPSK low voltage and low power tunable ultra-wideband (UWB) applications. The pulse generator, simulated in a SMIC 0.13 μm CMOS technology, provides a tunable, both in pulse width duration and repetition time, Gaussian monocycle compliant with the sub-GHz ETSI band and suitable to be used in UWB radio applications. The preliminary IC simulation results show a pulse duration from 1 ns up to 20 ns with good pulse symmetry and with the DPSK modulation capability. The circuit power consumption is about 1 mW from a 1.8 V power supply.

Sign in / Sign up

Export Citation Format

Share Document