scholarly journals A Miniaturized Transmitting LPDA Design for 2 MHz–30 MHz Uses

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6034
Author(s):  
Wenjun Zhu ◽  
Lixin Guo
Keyword(s):  
High Frequency ◽  
Optimization Methods ◽  
Directional Pattern ◽  
Electrical Performance ◽  
Impedance Bandwidth ◽  
Gain Bandwidth ◽  
Wave Simulation ◽  
Full Wave ◽  
Coefficient Optimization ◽  
Simulation Results

A miniaturized horizontal polarized high frequency transmitting LPDA is presented. In use of the dipole transformation and antenna coefficient optimization methods, a 65% reduction in the size was achieved with the electrical performance kept in a competitive level. Full-wave simulation results showed a stable directional pattern and lower VSWR over the impedance bandwidth of 2 to 30 MHz. The gain bandwidth can reach the range of 4–30 MHz, meanwhile, there is only minor degradation on gain in frequencies under 4 MHz.

scholarly journals Design of a Compact CPW-Fed Monopole Antenna With Asymmetrical Hexagonal Slot Loaded Ground Structure for C/X/Ku Band Applications

2020 ◽  
Vol 16 (1) ◽  
pp. 15-22
Author(s):  
Ajay Kumar Dwivedi ◽  
Brijesh Mishra ◽  
Vivek Singh ◽  
Pramod Narayan Tripathi ◽  
Ashutosh Kumar Singh
Keyword(s):  
High Frequency ◽  
Ground Plane ◽  
Directional Pattern ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
High Frequency Structure Simulator ◽  
Performance Matrix ◽  
Novel Design ◽  
Ku Band

AbstractA novel design of ultra-wideband CPW-fed compact monopole patch antenna is presented in the article. The size of the antenna is 22 × 18 × 1.6 mm and it operates well over an ultra-wideband frequency range 4.86–13.66 GHz (simulated) and 4.93–13.54 GHz (measured) covering C, X and partial Ku band applications. The proposed design consists of a defected ground plane and U-shape radiating patch along with two square shape parasitic patches in order to achieve the ultra-wideband (UWB) operations. The performance matrix is validated through measured results that indicate the wide impedance bandwidth (93.2 %) with maximum gain of 4 dBi with nearly 95 % of maximum radiation efficiency; moreover, the 3D gain pattern manifests approximately omni-directional pattern of the proposed design. The prototype has been modelled using HFSS (High Frequency Structure Simulator-18) by ANSYS, fabricated and tested using vector network analyser E5071C.

scholarly journals A Miniaturized Dual-Mode Bandpass Filter Using Slot Spurline Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Haiwen Liu ◽  
Jiuhuai Lei ◽  
Jing Wan ◽  
Yan Wang ◽  
Feng Yang ◽  
...  
Keyword(s):  
Elliptic Function ◽  
Bandpass Filter ◽  
Dual Mode ◽  
Wave Simulation ◽  
Full Wave ◽  
Filter Characteristic ◽  
Simulation Results ◽  
Degenerate Modes ◽  
Good Agreement

A miniaturized dual-mode bandpass filter (BPF) with elliptic function response using slot spurline is designed in this paper. The slot spurline can not only splits the degenerate modes but also determine the type of filter characteristic (Chebyshev or elliptic). To miniaturize the resonator, four sagittate stubs are proposed. For demonstration purpose, a BPF operating at 5.75 GHz for WLAN application was designed, fabricated, and measured. The measured results are in good agreement with the full-wave simulation results.

scholarly journals Control of the Radiation Patterns Using Homogeneous and Isotropic Impedance Metasurface

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Fan Yang ◽  
Zhong Lei Mei ◽  
Tie Jun Cui
Keyword(s):  
Point Source ◽  
Surface Impedance ◽  
High Selectivity ◽  
Two Dimensional ◽  
Radiation Patterns ◽  
Wave Simulation ◽  
Full Wave ◽  
Low Profile ◽  
Simulation Results

We propose to control the radiation patterns of a two-dimensional (2D) point source by using impedance metasurfaces. We show that the radiation patterns can be manipulated by altering the surface impedance of the metasurface. Full-wave simulation results are provided to validate the theoretical derivations. The proposed design enjoys novel properties of isotropy, homogeneity, low profile, and high selectivity of frequency, making it potentially applicable in many applications. We also point out that this design can be implemented with active metasurfaces and the surface impedance can be tuned by modulating the value of loaded elements, like resistors, inductors, and capacitors.

Tunable High-Q TSV Inductor Packaging with MEMS

2015 ◽  
Vol 2015 (1) ◽  
pp. 000062-000066 ◽  
Author(s):  
Bruce Kim ◽  
Saikat Mondal ◽  
Sang-Bock Cho
Keyword(s):  
Mechanical Systems ◽  
Micro Electro Mechanical Systems ◽  
Frequency Bands ◽  
High Isolation ◽  
High Q ◽  
Wave Simulation ◽  
Full Wave ◽  
Leakage Resistance ◽  
Simulation Results ◽  
Tunable Inductor

In this paper, we present a Through-Silicon-Via (TSV)-based 3D tunable inductor implementation for RF applications. The proposed inductor structure uses MEMS (Micro Electro-Mechanical Systems) switches to vary inductance by activating and deactivating the switches. MEMS-based switches are used to offer high isolation in the off state. The tunable inductor is tested within an LNA circuit for variation in off-state leakage resistance. Detailed 3D full wave simulation results are presented for different cellular frequency bands.

Comparison Between Multilayer Ceramic and Organic Package Substrates Based Upon Signal and Power Integrity

2011 ◽  
Vol 2011 (1) ◽  
pp. 000905-000913
Author(s):  
Jerry Aguirre ◽  
Paul Garland ◽  
Marcos Vargas ◽  
Heather Tallo ◽  
Joseph Tallo
Keyword(s):  
Power Distribution ◽  
Flip Chip ◽  
Organic Substrate ◽  
Electrical Performance ◽  
Power Integrity ◽  
Power Distribution Network ◽  
Wave Simulation ◽  
Full Wave ◽  
Differential Pair ◽  
Multilayer Ceramic

Comparisons between organic and ceramic packaging is a difficult task given the considerable number of differences in material properties and potential tradeoffs between cost, electrical performance, thermal performance, and environmental factors. This paper presents a power and signal integrity comparison between a select set of multilayer organic technologies (HDBU and CPCore) and multilayer ceramic technologies (HTCC and LTCC). The geometry and material property impact on electrical performance for the flip-chip first level interconnect are qualitatively discussed and compared. The broadband frequency performance for the ball grid array (BGA) second-level interconnect to a PWB is simulated and characterized to 40 GHz for a differential pair using full-wave simulation. The impedance of the power distribution network (PDN) for a ceramic package is characterized by measurement to correlate with full-wave simulation to then subsequently compare with an organic substrate PDN.

scholarly journals A Dual Band Patch Antenna with a Pinwheel-Shaped Slots EBG Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoyan Zhang ◽  
Zhaopeng Teng ◽  
Zhiqing Liu ◽  
Bincheng Li
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Coaxial Line ◽  
Microstrip Patch Antenna ◽  
Radiation Efficiency ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Planar Antennas ◽  
Microstrip Patch ◽  
Full Wave

A dual band microstrip patch antenna integrated with pinwheel-shaped electromagnetic band-gap (EBG) structures is proposed. The patch antenna consists of a pair of spiral slots on the patch and is fed by using coaxial line. Its full-wave simulation predicts dual bands from 4.43 GHz to 4.56 GHz and from 4.96 GHz to 5.1 GHz in the C-band. The designed EBG with eight pinwheel-shaped slots addresses smaller frequency drift compared with the traditional square mushroom-like EBG when applied to the patch antenna. With the help of designed EBG structure, the impedance bandwidth, radiation efficiency, and gain of the patch antenna are improved significantly. The 10 dB impedance bandwidth is extended by 3.4% and 6.5% at the low- and high-frequency bands, respectively. The radiation efficiency is increased by 5% and 17.8%, and the realized gain is enhanced by 1.87 dB and 1.56 dB at 4.57 GHz and 5.06 GHz, respectively. The designed EBG structure may have many applications in other types of planar antennas.

scholarly journals Analysis and Design of Ultra-Wideband 3-Way Bagley Power Divider Using Tapered Lines Transformers

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Khair Al Shamaileh ◽  
Abdullah Qaroot ◽  
Nihad Dib ◽  
Abdelfattah Sheta ◽  
Majeed A. Alkanhal
Keyword(s):  
Design Procedure ◽  
Ultra Wideband ◽  
Power Divider ◽  
Frequency Range ◽  
Analysis And Design ◽  
Wave Simulation ◽  
Full Wave ◽  
Quarter Wave ◽  
Simulation Results

An ultra-wideband (UWB) modified 3-way Bagley polygon power divider (BPD) that operates over a frequency range of 2–16 GHz is presented. To achieve the UWB operation, the conventional quarter-wave transformers in the BPD are substituted by two tapered line transformers. For verification purposes, the proposed divider is simulated, fabricated, and measured. The agreement between the full-wave simulation results and the measurement ones validates the design procedure.

scholarly journals Tailoring the scattering properties of coding metamaterials based on machine learning

2021 ◽  
Vol 8 ◽  
pp. 15
Author(s):  
Shuai Yang ◽  
Kuang Zhang ◽  
Xumin Ding ◽  
Guohui Yang ◽  
Qun Wu
Keyword(s):  
Machine Learning ◽  
Genetic Algorithm ◽  
Pattern Analysis ◽  
Analytical Calculation ◽  
Scattering Pattern ◽  
Wave Simulation ◽  
Full Wave ◽  
Binary Coding ◽  
Calculation Results ◽  
Simulation Results

Diverse electromagnetic (EM) responses of coding metamaterials have been investigated, and the general research method is to use full-wave simulation. But if we only care its scattering properties, it is not necessary to perform full-wave simulation, which is usually time-consuming. Machine learning has significantly impelled the development of automatic design and optimize coding matrix. Based on metamaterial particle that has multiple response and genetic algorithm which is coupled with the scattering pattern analysis, we can optimize the coding matrix quickly to tailor the scattering properties without conducting full-wave simulation a lot of times for optimization. Since the coding matrix control of each particle allow modulation of EM wave, various EM phenomena can be achieved easier. In this paper, we proposed two reflective unitcells with different reflection phase, and then a semi-analytical model is built up for unitcells. To tailor the scattering properties, genetic algorithm normally based on binary coding, is coupled with the scattering pattern analysis in order to optimize the coding matrix. Finally, simulation results are compared with the semi-analytical calculation results and it is found that the simulation results agree very well with the theoretical values.

Ceramic Process Variation Impact on Electrical Design Of High Frequency Components

2014 ◽  
Vol 2014 (1) ◽  
pp. 000205-000212
Author(s):  
Jerry Aguirre ◽  
Heather Tallo ◽  
Hide Shigenobu ◽  
Joe Uyesugi
Keyword(s):  
High Frequency ◽  
High Speed ◽  
Digital Signal ◽  
Monte Carlo Analysis ◽  
Electrical Performance ◽  
Full Wave ◽  
Microwave Components ◽  
Frequency Components ◽  
Rf Performance ◽  
High Frequency Microwave

The design and operation of high frequency microwave components and high-speed interconnects depends strongly on well characterized material technologies for robust, consistent, and repeatable performance from part to part. While characterization of the electrical and mechanical material properties is extremely important, the processing of the material into making structures is equally important. The process ultimately determines structure dimensional tolerances that will impact electrical performance, especially at high speed digital signal and high frequency applications. Understanding these tolerances, and their RF impact, can assist in selecting a material set based on process in addition to the published material electrical properties. This paper examines key electrical performance properties of two ceramic microwave components, a tapped line filter and an edge coupled microstrip filter, as a function of structure variations by use of a combination of a full-wave electromagnetic simulation tool and a pseudo-Monte Carlo analysis. These microwave components have been fabricated and measured to examine variations in RF performance as function of location on ceramic panel and to compare measured variations to expected variation predicted by simulation and analysis.

A Study of the Effect of Absorbing Materials in the UHF Sensor

2012 ◽  
Vol 542-543 ◽  
pp. 765-768 ◽  
Author(s):  
Hong Fu Guo ◽  
Mi Fu ◽  
Jin Feng Tang ◽  
Cai Xiang Xu
Keyword(s):  
High Frequency ◽  
Impedance Bandwidth ◽  
Ultra High Frequency ◽  
Ansoft Hfss ◽  
Absorbing Materials ◽  
Metallic Shell ◽  
Absorbing Material ◽  
Simulation Results

An ultra high frequency (UHF) sensor antenna with metallic shell for PD detection has been proposed and experimentally studied in this article. The impedance bandwidth of the proposed phantom is considerably improved when the metallic shell is filled with radiation absorbing material, which is based on the simulation results by Ansoft HFSS. When the height of the RAM reaches 3 cm, the proposed antenna obtains a bandwidth from 800 MHz to over 1.7 GHz with VSWR<2.7, within which can effectively detect the PD signals.

Sign in / Sign up

Export Citation Format

Share Document