scholarly journals A Novel Dual Ultrawideband CPW-Fed Printed Antenna for Internet of Things (IoT) Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Qasim Awais ◽  
Hassan Tariq Chattha ◽  
Mohsin Jamil ◽  
Yang Jin ◽  
Farooq Ahmad Tahir ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Design Process ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Antenna Design ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Optimized Design ◽  
Printed Antenna ◽  
Low Profile

This paper presents a dual-band coplanar waveguide (CPW) fed printed antenna with rectangular shape design blocks having ultrawideband characteristics, proposed and implemented on an FR4 substrate. The size of the proposed antenna is just 25 mm × 35 mm. A novel rounded corners technique is used to enhance not only the impedance bandwidth but also the gain of the antenna. The proposed antenna design covers two ultrawide bands which include 1.1–2.7 GHz and 3.15–3.65 GHz, thus covering 2.4 GHz Bluetooth/Wi-Fi band and most of the bands of 3G, 4G, and a future expected 5G band, that is, 3.4–3.6 GHz. Being a very low-profile antenna makes it very suitable for the future 5G Internet of Things (IoT) portable applications. A step-by-step design process is carried out to obtain an optimized design for good impedance matching in the two bands. The current densities and the reflection coefficients at different stages of the design process are plotted and discussed to get a good insight into the final proposed antenna design. This antenna exhibits stable radiation patterns on both planes, having low cross polarization and low back lobes with a maximum gain of 8.9 dB. The measurements are found to be in good accordance with the simulated results.

scholarly journals CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 651-655 ◽  
Author(s):  
Yilin Liu ◽  
Kama Huang
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Axial Ratio ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Feeding Method ◽  
Circularly Polarized ◽  
Low Profile ◽  
Novel Design

Abstract A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the ground plane. The measured results show that this kind of feeding method can improve the impedance bandwidth, as well as the axial ratio bandwidth of the CP antenna array and provide adequate gain. The proposed array can achieve a 6.08% impedance bandwidth and a 4.10% CP bandwidth. Details of the antenna design and experimental results are presented and discussed.

scholarly journals Bandwidth Enhancement Technique of the Meandered Monopole Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Chien-Jen Wang ◽  
Dai-Heng Hsieh
Keyword(s):  
Communication Systems ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Matching Condition ◽  
Resonant Mode ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Feeding Structure

A small dual-band monopole antenna with coplanar waveguide (CPW) feeding structure is presented in this paper. The antenna is composed of a meandered monopole, an extended conductor tail, and an asymmetrical ground plane. Tuning geometrical structure of the ground plane excites an additional resonant frequency band and thus enhances the impedance bandwidth of the meandered monopole antenna. Unlike the conventional monopole antenna, the new resonant mode is excited by a slot trace of the CPW transmission line. The radiation performance of the slot mode is as similar as that of the monopole. The parametrical effect of the size of the one-side ground plane on impedance matching condition has been derived by the simulation. The measured impedance bandwidths, which are defined by the reflection coefficient of −6 dB, are 186 MHz (863–1049 MHz, 19.4%) at the lower resonant band and 1320 MHz (1490–2810 MHz, 61.3%) at the upper band. From the results of the reflection coefficients of the proposed monopole antenna, the operated bandwidths of the commercial wireless communication systems, such as GSM 900, DCS, IMT-2000, UMTS, WLAN, LTE 2300, and LTE 2500, are covered for uses.

scholarly journals Design and Implementation of Low Profile Antenna for Dual-Band Applications Using Rotated E-Shaped Conductor-Backed Plane

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Mahdi Jalali ◽  
Tohid Sedghi ◽  
Shahin Shafei
Keyword(s):  
Impedance Matching ◽  
Ground Surface ◽  
Dual Band ◽  
Handheld Devices ◽  
Impedance Bandwidth ◽  
Low Profile ◽  
X Band ◽  
Compact Size ◽  
Proper Values ◽  
5 Ghz

A novel configuration of a printed monopole antenna with a very compact size for satisfying WLAN operations at the 5.2/5.8 GHz and also for X-band operations at the 10 GHz has been proposed. The antenna includes a simple square-shaped patch as the radiator, the rotated U-shaped conductor back plane element with embedded strip on it, and the partial rectangular ground surface. By using the rotated U-shaped conductor-backed plane with proper values, good impedance matching and improvement in bandwidth can be achieved, at the lower and upper bands. The impedance bandwidth forS11<-10 dB is about 1.15 GHz for 5 GHz band and 5.3 GHz for X-band. The measured peak gains are about 1.9 dBi at WLAN-band and 4.2 dBi at X-band. The experimental results represent that the realized antenna with good omnidirectional radiation characteristics, enough impedance bandwidth, and reasonable gains can be appropriate for various applications of the future developed technologies and handheld devices.

scholarly journals A New Design of a CPW-Fed Dual-Band Monopole Antenna for RFID Readers

2018 ◽  
Vol 8 (2) ◽  
pp. 1040
Author(s):  
Ahmed El Hamraoui ◽  
EL Hassane Abdelmounim ◽  
Jamal Zbitou ◽  
Hamid Bennis ◽  
Mohamed Latrach
Keyword(s):  
Low Cost ◽  
Coplanar Waveguide ◽  
Monopole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Critical Parameters ◽  
Antenna Structure ◽  
Low Profile ◽  
Measurement Results ◽  
Rfid Readers

<p>This paper comes with a new dual-band planar monopole antenna fed by Coplanar Waveguide (CPW) line designed for RFID readers and it operates at 2.45 GHz, 5.80 GHz. This antenna is designed with reasonable gain, low profile and low cost production. The designed antenna based on theoretical equations is simulated and validated by using ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. A parametric study of the proposed antenna has been carried out by optimizing some critical parameters. The antenna has a total area of 35×38 mm2 and mounted on an FR4 substrate with dielectric permittivity constant 4.4 and thickness of 1.6 mm and loss tangent 0.025. The comparison between simulation and measurement results permits to validate the final achieved antenna structure in the desired RFID frequencies bands. Details of the proposed antenna design and both simulated and experimental results are described and discussed</p>

scholarly journals Compact Broadband Circularly Polarized CPW-Fed Antenna with Characteristic Mode Analysis

2022 ◽  
Vol 2022 ◽  
pp. 1-11
Author(s):  
Wei Xu ◽  
Jingchang Nan ◽  
Mingming Gao
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Mode Analysis ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Characteristic Mode ◽  
Circularly Polarized ◽  
Low Profile ◽  
Compact Size

A compact circularly polarized (CP) antenna is proposed for low-profile and wideband operation based on characteristic mode analysis (CMA). A ring patch with a gap and two arc-shaped metallic stubs as the radiator is analyzed and optimized by CMA to figure out the orthogonal modes and operating frequency band for potential good axial ratio (AR) performance. The studies of these CP modes provide a physical insight into the property of broadband circular polarization. Such an in-depth understanding paves the way for the proposal of novel CP antenna with separation between the design of radiator and feeding network. A 50-Ω coplanar waveguide (CPW) is introduced and placed appropriately to excite the desired modes based on the information from CMA, which employs two asymmetric ground planes to improve the performance in terms of AR and impedance matching. The antenna with a compact size of 0.71λ0 × 0.76λ0 × 0.038λ0 (λ0 is the free-space wavelength at the center frequency of the 3-dB AR bandwidth) is fabricated and measured for validation. The realized gain varies from 1.6 to 3.1 dBic over the operating bandwidth characterized by the measured 10-dB impedance bandwidth of 83.8% (3.98–9.72 GHz) and 3-dB AR bandwidth of 70.3% (4.59–9.57 GHz), respectively.

A new compact CPW-Fed dual-band monopole antenna for RFID applications

2017 ◽  
Vol 8 (1) ◽  
pp. 69 ◽  
Author(s):  
Ahmed Elhamraoui ◽  
El Hassan Abdelmounim ◽  
Jamal Zbitou ◽  
Ahmed Errkik ◽  
Hamid Bennis ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Radio Frequency Identification ◽  
Coplanar Waveguide ◽  
Monopole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Microwave Integrated Circuits ◽  
Frequency Identification ◽  
Rfid Applications

<p>This paper presents a study of a new dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and covering free ISM bands of 2.45GHz and 5.8GHz. The proposed antenna benefits from the advantages of the CPW line to simplify the structure of the antenna into a single metallic level, by consequent making it easier for integration with microwave integrated circuits. The simulation of the antenna was carried out using ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. A good impedance bandwidth of 500MHz is achieved in measurement (from 2.1GHz to 2.6GHz for the lower band), while the upper band covers 800MHz (from 5.2GHz to 6GHz). Details of the proposed antenna design and both simulated and experimental results are described and discussed.<strong><em></em></strong></p>

Compact dual-band millimeter-wave antenna for 5G WLAN

2021 ◽  
pp. 1-8
Author(s):  
Melvin Chamakalayil Jose ◽  
Sankararajan Radha ◽  
Balakrishnapillai Suseela Sreeja ◽  
Mohammed Gulam Nabi Alsath ◽  
Pratap Kumar
Keyword(s):  
Impedance Matching ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Defected Ground Structure ◽  
Compact Structure ◽  
Low Profile ◽  
Millimeter Wave Antenna ◽  
Measured Impedance

Abstract This paper presents a novel compact dual-band printed antenna with an omnidirectional radiation pattern for 5G WLAN. The antenna element comprises a star-shaped patch with six disc-shaped elements at the top and a defected ground structure at the bottom, having a radius of 3.77 mm for both. The proper feeding point and alignment with its element parameters help to achieve good impedance matching. The proposed antenna has a single center feed, a low profile, and a straightforward compact structure without any feeding complexity. A high reception fidelity antenna with comparable bandwidth and moderate gain is presented. The prototype radiator was printed on a 4 mm radius and a 1.6 mm thick dielectric substrate (Rogers RT/Duroid 5880), with a dielectric constant of 2.2. The designed antenna is fabricated and measured to validate the simulation result. The measured impedance bandwidth of 1.3 GHz (27.5–28.8 GHz) and 2.2 GHz (32.45–34.65 GHz) with a respective measured gain of 1.1 and 3.2 dBi are achieved at 28 and 34 GHz. The simulated radiation efficiency of above 95% is achieved for both bands. A good agreement between simulated and measured results of the proposed work shows that the proposed antenna is suitable for 5G short-range WLAN communications.

Compact dual and triple band antennas for 5G-IOT applications

2021 ◽  
pp. 1-8
Author(s):  
Ruchi ◽  
Amalendu Patnaik ◽  
M. V. Kartikeyan
Keyword(s):  
Microwave Frequency ◽  
Mobile Internet ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Printed Antenna ◽  
Iot Applications ◽  
Multiband Antennas ◽  
New Radio ◽  
Compact Size ◽  
Triple Band

Abstract Designing miniaturized multiband antennas to cover both the 5G new radio frequencies (FR1 and FR2) simultaneously is a challenge for wireless communication researchers. This paper presents two antenna designs : a dual-band printed antenna of size 18 × 16 × 0.285 mm3 operating at FR1–5.8 GHz and FR2–28 GHz and a triple-band printed antenna with dimensions 30 × 25 × 0.543 mm3 operating at FR1–3.5 GHz and 5.8 GHz (sub-6 GHz microwave frequency bands) and FR2–28 GHz (mm-wave frequency band). The final projected triple-band antenna has a compact size with an impedance bandwidth of 12.71%, 11.32%, and 18.3% at 3.5 GHz, 5.8 GHz, and 28 GHz, respectively with the corresponding gain of 1.86 dB, 2.55 dB, and 4.41 dB. The measured radiation characteristics of the fabricated prototypes show that the proposed designs are suitable for trendy 5G-RFID and mobile Internet of things (IoT) applications.

Dual Band Slot Antenna for 3.5 WiMAX and 5.8 WLAN

2014 ◽  
Vol 68 (1) ◽  
Author(s):  
Sahar Chagharvand ◽  
M. R. B. Hamid ◽  
M. R. Kamarudin ◽  
Mohsen Khalily
Keyword(s):  
Radiation Pattern ◽  
Coplanar Waveguide ◽  
Single Layer ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Dual Bandwidth ◽  
Electromagnetic Performance ◽  
Good Agreement

This paper presents a single layer planar slot antenna for dual band operation. The antenna is fed by a coplanar waveguide (CPW) with two inverted C-shaped resonators to achieve the dual band operation. The impedance bandwidth for ǀS11ǀ < -10dB is 14% in lower band and 7% in higher band. The antenna prototype’s electromagnetic performance, impedance bandwidth, radiation pattern, and antenna gain were measured. The proposed configuration offers a relatively compact, easy to fabricate and dual band performance providing gain between 2 and 4 dBi. The designed antenna has good dual bandwidth covering 3.5 WiMAX and 5.8 WLAN tasks. Experimental and numerical results also showed good agreement after comparison.

scholarly journals Miniaturized Broadband-Multiband Planar Monopole Antenna in Autonomous Vehicles Communication System Device

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2715
Author(s):  
Ming-An Chung ◽  
Chih-Wei Yang
Keyword(s):  
Communication System ◽  
Autonomous Vehicles ◽  
Low Cost ◽  
Antenna Design ◽  
Dual Band ◽  
Impedance Change ◽  
Antenna Structure ◽  
Low Profile ◽  
Performance Results ◽  
Wireless Standards

The article mainly presents that a simple antenna structure with only two branches can provide the characteristics of dual-band and wide bandwidths. The recommended antenna design is composed of a clockwise spiral shape, and the design has a gradual impedance change. Thus, this antenna is ideal for applications also recommended in these wireless standards, including 5G, B5G, 4G, V2X, ISM band of WLAN, Bluetooth, WiFI 6 band, WiMAX, and Sirius/XM Radio for in-vehicle infotainment systems. The proposed antenna with a dimension of 10 × 5 mm is simple and easy to make and has a lot of copy production. The operating frequency is covered with a dual-band from 2000 to 2742 MHz and from 4062 to beyond 8000 MHz and, it is also demonstrated that the measured performance results of return loss, radiation, and gain are in good agreement with simulations. The radiation efficiency can reach 91% and 93% at the lower and higher bands. Moreover, the antenna gain can achieve 2.7 and 6.75 dBi at the lower and higher bands, respectively. This antenna design has a low profile, low cost, and small size features that may be implemented in autonomous vehicles and mobile IoT communication system devices.

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