scholarly journals A New Compact and Miniaturized GCPW-fed Slotted Rectangular antenna for Wideband UHF FIRD Applications

2017 ◽  
Vol 7 (2) ◽  
pp. 767
Author(s):  
Rachid Dakir ◽  
Jamal Zbitou ◽  
Ahmed Mouhsen ◽  
A. Tribak ◽  
M. Latrach ◽  
...  
Keyword(s):  
Return Loss ◽  
Uhf Rfid ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Coplanar Line ◽  
Ground Plan ◽  
Rectangular Patch ◽  
Large Frequency ◽  
Rfid Applications ◽  
Cst Microwave Studio

This paper presents the development of a new miniaturized and compact GCPW-fed slotted rectangular antenna structure reader for wideband UHF RFID applications. The optimized proposed antenna is suitable to operate a large frequency-band range from 0.8GHz to 1.3GHz with a bandwidth of 500MHz with a return loss less than -10dB. The antenna is based on a 1.6mm thickness FR4 epoxy substrate with a reduce dimensions compared to the simple rectangular antenna and size of proposed antenna is 47*40mm2. The new design consists of a compact rectangular patch with symmetric U-shaped slots and I-shaped include a partial ground plan and fed by 50 Grounded coplanar line. The antenna parameters have been investigated and optimized by   using   CST Microwave Studio. To validate the CST Microwave Studio results before the   antenna achievement,   we   have   conducted another study by using ADS. The   final circuit   achieved, measured and validated. Experimental results show that the proposed antenna has good radiation characteristics and operating in UHF-RFID applications.

scholarly journals Design and Simulation of Spoon Shaped Antenna using DGS

2019 ◽  
Vol 9 (2) ◽  
pp. 2257-2259
Keyword(s):  
Return Loss ◽  
Antenna Design ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Comparison Results ◽  
Wireless Application ◽  
Cst Microwave Studio

A planer spoon shaped antenna with defected ground structure (DGS) is designed and fabricated for wireless application. The proposed antenna design exhibits 1.6GHz bandwidth, 2.20dBi Avg. Gain and maximum return loss of -24.5dB, which offers better results in wideband application. The Proposed antenna structure is simulated by software CST MWS (CST Microwave Studio) version 2018 and later comparison results are also presented

scholarly journals Investigation on Wearable Antenna under Different Bending Conditions for Wireless Body Area Network (WBAN) Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ismahayati Adam ◽  
Muhammad Ramlee Kamarudin ◽  
Ali H. Rambe ◽  
Norshakila Haris ◽  
Hasliza A. Rahim ◽  
...  
Keyword(s):  
Return Loss ◽  
Coupling Effect ◽  
Ground Plane ◽  
Wireless Body Area Network ◽  
Area Network ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Wearable Antenna ◽  
Operating Frequency Range ◽  
Textile Antenna

This paper analysed the effects of bending on the performance of a textile antenna wherein the antenna under test was made of felt substrate for both industrial, scientific, and medical (ISM) band and WBAN applications at 2.45 GHz. Moreover, the conductive material was used for the patch, and the ground plane used a 0.17 mm Shieldit textile. Meanwhile, the antenna structure was in the form of rectangular, with a line patch in between elements to abate the mutual coupling effect. The measured operating frequency range of the antenna spanned from 2.33 GHz to 2.5 GHz with a gain of 4.7 dBi at 2.45 GHz. In this paper, the antenna robustness was examined by bending the structure on different radii and degrees along both X- and Y-axis. Next, the effects on return loss, bandwidth, isolation, and radiation characteristics were analysed. This paper also discovered that the antenna’s performance remained acceptable as it was deformed, and the measured results agreed well with the simulation.

A Novel UHF RFID Reader Antenna

2010 ◽  
Vol 40-41 ◽  
pp. 384-387
Author(s):  
Xin Zhang ◽  
Lei Li
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Simple Structure ◽  
Ground Plane ◽  
Uhf Rfid ◽  
Radiation Characteristics ◽  
Circularly Polarized ◽  
Rfid Reader ◽  
Reader Antenna ◽  
Simulation Results

In this paper, a new ultrahigh frequency circularly polarized microstrip antenna using in RFID reader is proposed. The proposed antenna has a simple structure, it has non-symmetrical rectangular corner truncated square patch, ground plane and a probe feed. To achieve good circular polarization(CP) radiation characteristics, it uses air as the dielectric layer. Simulation results of a constructed prototype with the center operating frequency at 923 MHz showed that the antenna has a return loss S11 of about −24 dB, a gain level of about 9.48 dBi. The antenna has good impedance and radiation characteristics over the required bandwidth, 920-925 MHz (Chinese UHF RFID band).

scholarly journals A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications

2007 ◽  
Vol 2007 ◽  
pp. 1-8 ◽  
Author(s):  
Hang Leong Chung ◽  
Xianming Qing ◽  
Zhi Ning Chen
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Parametric Studies ◽  
Hybrid Coupler ◽  
Rfid Applications ◽  
Uhf Band

A broadband circularly polarized stacked probe-fed antenna suitable for UHF RFID applications is presented and studied. The proposed antenna is fed by two probes which are connected to a hybrid coupler. Two parasitic patches are stacked above a primary probe-fed patch to enhance the bandwidth of the antenna. The optimized antenna prototype achieves gain of more than 6.5 dBic, axial ratio of less than 3.0 dB, and return loss of less than−15 dB over the UHF band of 820–980 MHz (17.7%). Parametric studies are carried out to demonstrate the effects of antenna geometry parameters on the performance. The proposed antenna can be a good candidate for UHF RFID applications.

scholarly journals CPW-Fed Flexible Ultra-Wideband Antenna for IoT Applications

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 453
Author(s):  
Sharadindu Gopal Kirtania ◽  
Bachir Adham Younes ◽  
Abdul Rakib Hossain ◽  
Tutku Karacolak ◽  
Praveen Kumar Sekhar
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Coplanar Waveguide ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Iot Applications ◽  
Good Agreement

In this article, an inkjet-printed circular-shaped monopole ultra-wideband (UWB) antenna with an inside-cut feed structure was implemented on a flexible polyethylene terephthalate (PET) substrate. The coplanar waveguide (CPW)-fed antenna was designed using ANSYS high-frequency structural simulator (HFSS), which operates at 3.04–10.70 GHz and 15.18–18 GHz (upper Ku band) with a return loss < −10 dB and a VSWR < 2. The antenna, with the dimensions of 47 mm × 25 mm × 0.135 mm, exhibited omnidirectional radiation characteristics over the entire impedance bandwidth, with an average peak gain of 3.94 dBi. The simulated antenna structure was in good agreement with the experiment’s measured results under flat and bending conditions, making it conducive for flexible and wearable Internet of things (IoT) applications.

scholarly journals Read Range Performance of Microstrip Patch Reader Antenna for UHF RFID Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 3515-3519
Keyword(s):  
Radio Frequency Identification ◽  
Axial Ratio ◽  
Antenna Design ◽  
Uhf Rfid ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Rfid Applications ◽  
Read Range

This study conducted to compare a read range performance of microstrip patch reader antenna for UHF Radio Frequency Identification (RFID) applications. The circularly polarized reader antenna described in this study are designed to be affixed the polarization mismatch problem between reader antenna and tag antenna. Two truncated at the corner of the ordinary rectangular patch antenna is designed for UHF band (919-923 MHz) which destined for Malaysian systems. Measured results show that the antenna with size of 115*115*1.6 mm have gain antenna of 5.3 dBi, satisfactory 3-dB axial-ratio and reading range of 2m. Read range measurement results of the reader antenna design and tags antenna with the reader are observed and analysed to validate the practical performance. The reader antenna design delivered in this study areappropriate to UHF RFID applications.

scholarly journals Design and Simulation of Microstrip Patch Single Element, 1*2 Array Design and 1*4 Array Design for SART Applications

2020 ◽  
Vol 5 (8) ◽  
pp. 1407-1410
Author(s):  
K Radhakrishna ◽  
Dr. K Sreelakshmi
Keyword(s):  
Return Loss ◽  
Search And Rescue ◽  
Single Element ◽  
Strip Line ◽  
Efficiency Gain ◽  
Array Design ◽  
Antenna Structure ◽  
High Frequency Structure Simulator ◽  
Microstrip Patch ◽  
Rectangular Patch

The Search and Rescue Transponders are used to search for the lost ship and aircraft. The transponder antenna resonates at the frequency of 9 GHz. The design is considered using FR4 (Flame Retardant) substrate of dielectric constant 4.4 and loss tangent 0.0019. A micro strip line fed rectangular patch antenna is designed in such a way that it resonates at 9 GHz. The return loss and gain for the designs are, Single Element Design: Return Loss is -24.291 dB, Gain Total is 5.9083 dB, 1*2 Array Design: Return Loss is -19.3635 dB, Gain Total is 8.5915 dB, 1*4 Array Design: Return Loss is -34.4773 dB, Gain Total is 9.4879 dB. Other antenna parameters such as VSWR, Radiation Efficiency, Gain 2D, Specific Absorption Rate are observed. The antenna structure is simple, flat and straightforward. The design can be embedded easily in Search and Rescue Transponder Transmitter because it is geometrically small. The simulation and analysis were done using High Frequency Structure Simulator (HFSS).

scholarly journals Bandwidth Optimization of a Textile PIFA with DGS Using Characteristic Mode Analysis

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2516
Author(s):  
Bashar Bahaa Qas Elias ◽  
Ping Jack Soh ◽  
Azremi Abdullah Al-Hadi ◽  
Prayoot Akkaraekthalin ◽  
Guy A. E. Vandenbosch
Keyword(s):  
Wireless Body Area Network ◽  
Simulation Software ◽  
The Body ◽  
Mode Analysis ◽  
Area Network ◽  
Defected Ground Structure ◽  
Characteristic Mode ◽  
Antenna Structure ◽  
Rectangular Patch ◽  
Conventional Optimization

This work presents the design and optimization of an antenna with defected ground structure (DGS) using characteristic mode analysis (CMA) to enhance bandwidth. This DGS is integrated with a rectangular patch with circular meandered rings (RPCMR) in a wearable format fully using textiles for wireless body area network (WBAN) application. For this integration process, both CMA and the method of moments (MoM) were applied using the same electromagnetic simulation software. This work characterizes and estimates the final shape and dimensions of the DGS using the CMA method, aimed at enhancing antenna bandwidth. The optimization of the dimensions and shape of the DGS is simplified, as the influence of the substrates and excitation is first excluded. This optimizes the required time and resources in the design process, in contrast to the conventional optimization approaches made using full wave “trial and error” simulations on a complete antenna structure. To validate the performance of the antenna on the body, the specific absorption rate is studied. Simulated and measured results indicate that the proposed antenna meets the requirements of wideband on-body operation.

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