Numerical and experimental characterization of a button-shaped miniaturized UHF antenna on magneto-dielectric substrate

2013 ◽  
Vol 5 (3) ◽  
pp. 231-239 ◽  
Author(s):  
Martino Aldrigo ◽  
Alessandra Costanzo ◽  
Diego Masotti ◽  
Carlo Baldisserri ◽  
Ioan Dumitru ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Dielectric Material ◽  
Dielectric Substrate ◽  
Strontium Hexaferrite ◽  
Experimental Characterization ◽  
Small Patch ◽  
Barium Strontium ◽  
Matching Performance ◽  
Good Agreement

The design and characterization of a new broadband small patch antenna, based on an innovative magneto-dielectric material and suitable for wearable applications at 868 MHz, is presented. To reduce antenna dimensions, while preserving its radiation and matching performance, a barium-strontium hexaferrite Ba0.75Sr0.25Fe12O19 has been synthesized as the antenna substrate to achieve magnetic permeability double than vacuum in the band of interest. First material realization is characterized and dispersive permittivity and permeability behaviors are included in the design of a small patch antenna with a shorting-plate. A button-size realization is obtained and its suitability for wearable applications is numerically and experimentally demonstrated on body with and without the presence of conductive shielding. Very good agreement with measurements is demonstrated for both matching and radiation performance of the antenna.

Experimental Characterization of a T-Shaped Programmable Multistable Mechanism

2018 ◽  
Vol 140 (9) ◽  
Author(s):  
Mohamed Zanaty ◽  
Simon Henein
Keyword(s):  
Numerical Simulations ◽  
Reaction Force ◽  
Experimental Measurements ◽  
Experimental Characterization ◽  
Stable States ◽  
Stability Behavior ◽  
The Stability ◽  
Force Characteristics ◽  
Good Agreement

Programmable multistable mechanisms (PMM) exhibit a modifiable stability behavior in which the number of stable states, stiffness, and reaction force characteristics are controlled via their programming inputs. In this paper, we present experimental characterization for the concept of stability programing introduced in our previous work (Zanaty et al., 2018, “Programmable Multistable Mechanisms: Synthesis and Modeling,” ASME J. Mech. Des., 140(4), p. 042301.) A prototype of the T-combined axially loaded double parallelogram mechanisms (DPM) with rectangular hinges is manufactured using electrodischarge machining (EDM). An analytical model based on Euler–Bernoulli equations of the T-mechanism is derived from which the stability behavior is extracted. Numerical simulations and experimental measurements are conducted on programming the mechanism as monostable, bistable, tristable, and quadrastable, and show good agreement with our analytical derivations within 10%.

Dual Band Slotted Microstrip Patch Antenna For Wireless Applications

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Sushila Gupta ◽  
Esha Johari
Keyword(s):  
Patch Antenna ◽  
Dielectric Material ◽  
Dielectric Substrate ◽  
Microstrip Antennas ◽  
Dual Band ◽  
Band Frequency ◽  
Feeding Method ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Dual Band Antenna

This paper describes dual-band patch antenna. The dual-band operation is obtained by embedding a pair of Lshaped slots. Dual band antenna can reduce the size of antenna 40%, comparing with rectangular microstrip antennas on normal dielectric substrate, and have wider bandwidths for both bands. In this paper L-shaped slots patch antenna with length L= 25.74 mm and width W = 31.20 mm fabricated based on availability of Rogers Duorid 5880 dielectric material and a prototype antenna is developed. The dielectric constant of Rogers Duorid 5880 material is e= 2.2 having thickness h = 0.16 mm and copper thickness is 35 microns using a coaxial feeding method for dual band operation. The prototype antenna is operating in S band frequency range.

scholarly journals A new patch antenna for ultra wide band communication applications

2020 ◽  
Vol 18 (2) ◽  
pp. 848
Author(s):  
Anwar Sabah ◽  
Malik Jasim Frhan
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Wide Band ◽  
Dielectric Substrate ◽  
The Other ◽  
Ultra Wide Band ◽  
Uwb Antenna ◽  
Feed Point ◽  
Printed Monopole ◽  
Good Agreement

<span>A printed monopole patch Ultra Wide Band (UWB) antenna for use in UWB application is proposed in this paper. The proposed antenna consists of a patch with appropriate dimensions on one side of a dielectric substrate, and a partial ground plane on the other side of the substrate. The techniques that used to enhance the bandwidth are the partial ground plane, feed point position and adjusted feed gap. The substrate that is used in the proposed antenna is Fr4 epoxy, the optimum dimensions of the antenna are 40mm×28mm×1.5mm this antenna designed by HFSS program. The band achieved by the proposed antenna is from 3.6GHz to 15GHz. This antenna is fabricated in the ministry of science and technology Baghdad-Iraq and a good agreement between simulation and measured S11 is achieved. </span>

scholarly journals Experimental Characterization of 2 × 2 Electronically Reconfigurable 1 Bit Unit Cells for a Beamforming Transmitarray at X Band

2021 ◽  
Vol 21 (2) ◽  
pp. 153-160
Author(s):  
Biswarup Rana ◽  
In-Gon Lee ◽  
Ic-Pyo Hong
Keyword(s):  
Phase Shifter ◽  
Unit Cell ◽  
Experimental Characterization ◽  
Waveguide Transition ◽  
Transmitted Waves ◽  
X Band ◽  
Unit Cells ◽  
New Type ◽  
Good Agreement

This paper proposes a reconfigurable unit cell for a transmitarray operating at the X band. The unit cell consists of an active patch, a passive patch, and a phase shifter. The active patch has two PIN diodes that change the phase of 180° of the transmitted waves. The passive and active patches both have circular slots to enhance the bandwidth of the transmitted wave. We also propose a new type of experimental characterization technique to measure the performance of the unit cells at the X band without fabricating the entire transmitarray. Instead of a 1 unit cell as described in the literature, we propose 2 × 2 unit cells to measure the performance of unit cells using the X band waveguide. The waveguide consists of a WR-90 section and a rectangular to square waveguide transition section that can be fit to our proposed structure. A good agreement between simulated and measured results was found.

Experimental and theoretical characterization of the surface acoustic wave propagation properties of GaN epitaxial layers on c-plane sapphire

2003 ◽  
Vol 18 (5) ◽  
pp. 1157-1161 ◽  
Author(s):  
Kook Hyun Choi ◽  
Hyeong Joon ◽  
Su Jin Chung ◽  
Jin Yong Kim ◽  
Tae Kun Lee ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Chemical Vapor ◽  
Epitaxial Layers ◽  
Experimental Characterization ◽  
Acoustic Wave Propagation ◽  
Matrix Methods ◽  
Propagation Properties ◽  
Good Agreement

Surface acoustic wave (SAW) propagation properties of gallium nitride (GaN) epitaxial layers on sapphire were theoretically and experimentally characterized. GaN thin films were grown on a c-plane sapphire substrate using a metalorganic chemical vapor deposition system. The experimental characterization of SAW propagation properties was performed with a linear array of interdigital transducer structures, while SAW velocities were calculated by matrix methods. Experimentally, we found pseudo-SAW and high-velocity pseudo-SAW modes in the GaN/sapphire structure, which had a good agreement with calculated velocities.

scholarly journals Electrical Leakage Through Thin PDMS Microchannel Walls and its Applications

2008 ◽  
Author(s):  
Jiashu Sun ◽  
Saumitra K. Vajandar ◽  
Dongyan Xu ◽  
Yuejun Kang ◽  
Dongqing Li ◽  
...  
Keyword(s):  
Circuit Design ◽  
Dielectric Material ◽  
Microfluidic Channel ◽  
Microfluidic Channels ◽  
Experimental Characterization ◽  
Electrical Field ◽  
Pdms Channel ◽  
Pdms Microchannel ◽  
Individual Particles

PDMS is usually considered as a dielectric material and PDMS microchannel walls can be treated as an electrically insulated boundary. However, in certain layouts of microfluidic networks, electrical leakage through PDMS walls could significantly alter the electrical field in the microfluidic circuits, which must be carefully considered in microfluidic circuit design. We report on our experimental characterization of electrical leakage through PDMS microfluidic channel walls. Numerical modeling clearly disclosed the alteration of electrical field and electroosmotic velocity in the microfluidic channels because of the electrical leakage through the thin PDMS wall. In addition, we demonstrate that the electrical leakage through the PDMS channel wall can be used to realize trapping of individual particles at different locations inside the mcirofluidic channel by balancing the electroosmotic flow and electrophoretic migration of the particle.

scholarly journals Compact Double-P Slotted Inset-Fed Microstrip Patch Antenna on High Dielectric Substrate

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
M. R. Ahsan ◽  
M. T. Islam ◽  
M. Habib Ullah ◽  
W. N. L. Mahadi ◽  
T. A. Latef
Keyword(s):  
Patch Antenna ◽  
High Dielectric Constant ◽  
Dielectric Substrate ◽  
Microstrip Patch Antenna ◽  
Radiation Efficiency ◽  
Radiation Patterns ◽  
Microstrip Patch ◽  
Measurement Results ◽  
High Dielectric ◽  
Good Agreement

This paper presents a compact sized inset-fed rectangular microstrip patch antenna embedded with double-P slots. The proposed antenna has been designed and fabricated on ceramic-PTFE composite material substrate of high dielectric constant value. The measurement results from the fabricated prototype of the antenna show −10 dB reflection coefficient bandwidths of 200 MHz and 300 MHz with center resonant frequency of 1.5 GHz and 4 GHz, respectively. The fabricated antenna has attained gains of 3.52 dBi with 81% radiation efficiency and 5.72 dBi with 87% radiation efficiency for lower band and upper band, respectively. The measured E- and H-plane radiation patterns are also presented for better understanding. Good agreement between the simulation and measurement results and consistent radiation patterns make the proposed antenna suitable for GPS and C-band applications.

Sign in / Sign up

Export Citation Format

Share Document