scholarly journals Metasurface Superstrate Beam Steering Antenna with AMC for 5G/WiMAX/WLAN Applications

2021 ◽  
Author(s):  
Akhilesh Verma ◽  
Ravi Kumar Arya ◽  
Srinivasa Nallanthighal Raghava
Keyword(s):  
Beam Steering ◽  
Monopole Antenna ◽  
Bottom Part ◽  
Antenna Structure ◽  
Radiating Element

Abstract A beam-steering antenna based on non-uniform metasurface superstrate and AMC, operating at 3.5 GHz, is presented. The antenna can steer the beam along θ = -18° and 18° with the superstrate and along θ = 0° in the absence of the superstrate with almost zero scan loss. Antenna structure consists of a top layer of non-uniform metasurface superstrate made of a 20 × 20 grid of electrically-small square-shaped metallic pixels while the bottom part consists of AMC with a grid of 5 × 5 pixels. The radiating element, CPW-fed monopole antenna, is placed between AMC and superstrate. The fabricated prototype shows desired beam steering in directions of θ = -18°, 0°, and 18° while maintaining uniform realized gain of 5.5 dB and matches well with simulations.

Ultra wideband matching network design for a V-shaped square planar monopole antenna

2014 ◽  
Vol 6 (6) ◽  
pp. 555-564 ◽  
Author(s):  
Ramazan Köprü ◽  
Sedat Kilinç ◽  
Çağatay Aydin ◽  
Doğu Çağdaş Atilla ◽  
Cahit Karakuş ◽  
...  
Keyword(s):  
Network Design ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Network Analyzer ◽  
Matching Network ◽  
Coupling Element ◽  
Antenna Structure ◽  
Square Planar ◽  
Planar Monopole Antenna ◽  
Reflectance Measurements

In this paper, design, manufacture, and measurement of a wideband matching network for a broadband V-shaped square planar monopole antenna (V-SPMA) is presented. Matching network design is unavoidable in most cases even vital to facilitate a maximally flat power transfer gain for an antenna. In the work, a bandpass matching network (BPMN) design is done for a particular square monopole antenna with V-shaped coupling element that has essentially bandwidth increasing effect. Designed BPMN and the antenna forms a VSPMA–BPMN matched antenna structure. “real frequency technique” is employed in the BPMN design. BPMN prototype circuit has been constructed on an FR4 laminate with commercial microwave chip inductors and capacitors. Vector network analyzer gain and reflectance measurements of the matched antenna structure have shown highly compatible results to those of the theoretical design simulations along the passband (~0.8–4.7 GHz). Furthermore, newly proposed distributed capacitor–resistor lossy model for microstrip lines used in the BPMN circuit have exhibited that it can successfully mimic the measured gain and reflectance performance of the matched structure in passband and even in stopband upto 8 GHz. Designed structure can be utilized as a one single wideband broadcasting medium suitable for many communication standards such as GSM, 3G, and Wi-Fi.

scholarly journals Dual-Band Monopole Antenna for RFID Applications

2019 ◽  
Vol 11 (2) ◽  
pp. 31 ◽  
Author(s):  
Naser Ojaroudi Parchin ◽  
Haleh Jahanbakhsh Basherlou ◽  
Raed Abd-Alhameed ◽  
James Noras
Keyword(s):  
Radio Frequency Identification ◽  
Monopole Antenna ◽  
Dual Band ◽  
Rfid Technology ◽  
Antenna Structure ◽  
The Past ◽  
Frequency Identification ◽  
Rfid Applications ◽  
Significant Attention ◽  
Good Agreement

Over the past decade, radio-frequency identification (RFID) technology has attracted significant attention and become very popular in different applications, such as identification, management, and monitoring. In this study, a dual-band microstrip-fed monopole antenna has been introduced for RFID applications. The antenna is designed to work at the frequency ranges of 2.2–2.6 GHz and 5.3–6.8 GHz, covering 2.4/5.8 GHz RFID operation bands. The antenna structure is like a modified F-shaped radiator. It is printed on an FR-4 dielectric with an overall size of 38 × 45 × 1.6 mm3. Fundamental characteristics of the antenna in terms of return loss, Smith Chart, phase, radiation pattern, and antenna gain are investigated and good results are obtained. Simulations have been carried out using computer simulation technology (CST) software. A prototype of the antenna was fabricated and its characteristics were measured. The measured results show good agreement with simulations. The structure of the antenna is planar, simple to design and fabricate, easy to integrate with RF circuit, and suitable for use in RFID systems.

CPW-Fed 8-Shaped Monopole Antenna for Ultra Wideband Applications

Frequenz ◽  
2016 ◽  
Vol 70 (11-12) ◽  
Author(s):  
Sarthak Singhal ◽  
Amit Kumar Singh
Keyword(s):  
Group Delay ◽  
Coplanar Waveguide ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Antenna Structure ◽  
Operating Frequency Range ◽  
Good Agreement ◽  
Delay Variation

AbstractA CPW-fed 8-shaped monopole antenna for ultra wideband applications is presented. It consists of a 8-shaped monopole and two quarter elliptical coplanar waveguide ground planes. An impedance bandwidth from 5.4 GHz to 23.83 GHz is achieved. The radiation patterns are observed to be omnidirectional and bidirectional in E-and H-plane respectively at lower resonances. At higher frequencies, the radiation patterns are found to be nearly omnidirectional in both planes. The group delay variation is also observed to be constant in the operating frequency range. A good agreement is found between the simulation and experimental results. The designed antenna structure has miniaturized dimensions and wider bandwidth as compared to other already reported monopole structures.

Bandwidth enhancement of capacitive fed monopole antenna using parasitic patches

2015 ◽  
Vol 8 (2) ◽  
pp. 301-307 ◽  
Author(s):  
Kamalaveni Ayyadurai ◽  
Ganesh Madhan Muthu
Keyword(s):  
Near Field ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement ◽  
System A ◽  
Radiating Element ◽  
The One ◽  
Radio Band ◽  
5 Ghz

This paper proposed a compact planar monopole antenna operating at 5 GHz (5.180–5.825 GHz) industrial, scientific and medical (ISM) radio band. The antenna constructed with 20 mm × 12 mm radiating element and 25 mm square of the ground plane in FR4 substrate provided −10 dB bandwidth of 1 GHz (5.4–6.4 GHz). To improve the bandwidth, parasitic elements are added with the monopole antenna. A capacitive feed is also incorporated in the design. It observed that the proposed antenna with parasitic elements provides a larger impedance bandwidth of about 3 GHz (5.1–8.1 GHz), which is three-fold improvements over the one without parasitic patches. The prototype of the antenna that operates at 5.8 GHz frequency range is fabricated and characterized using a near-field measurement system. A good agreement is found between the simulation and measured results.

scholarly journals Dual Polarized Dual Fed Vivaldi Antenna for Cellular Base Station Operating at 1.7–2.7 GHz

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Marko Sonkki ◽  
Sami Myllymäki ◽  
Jussi Putaala ◽  
Eero Heikkinen ◽  
Tomi Haapala ◽  
...  
Keyword(s):  
Base Station ◽  
Performance Criteria ◽  
Impedance Bandwidth ◽  
Total Efficiency ◽  
Antenna Structure ◽  
Radiating Element ◽  
Vivaldi Antenna ◽  
Dual Polarized ◽  
Vivaldi Antennas ◽  
Better Than

The paper presents a novel dual polarized dual fed Vivaldi antenna structure for 1.7–2.7 GHz cellular bands. The radiating element is designed for a base station antenna array with high antenna performance criteria. One radiating element contains two parallel dual fed Vivaldi antennas for one polarization with 65 mm separation. Both Vivaldi antennas for one polarization are excited symmetrically. This means that the amplitudes for both antennas are equal, and the phase difference is zero. The orthogonal polarization is implemented in the same way. The dual polarized dual fed Vivaldi is positioned 15 mm ahead from the reflector to improve directivity. The antenna is designed for -14 dB impedance bandwidth (1.7–2.7 GHz) with better than 25 dB isolation between the antenna ports. The measured total efficiency is better than -0.625 dB (87%) and the antenna presents a flat, approximately 8.5 dB, gain in the direction of boresight over the operating bandwidth whose characteristics promote it among the best antennas in the field. Additionally, the measured cross polarization discrimination (XPD) is between 15 and 30 dB and the 3 dB beamwidth varies between 68° and 75° depending on the studied frequency.

scholarly journals Reflector-Backed Antenna for UWB Medical Applications with On-Body Investigations

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Chaïmaâ Kissi ◽  
Mariella Särestöniemi ◽  
Timo Kumpuniemi ◽  
Sami Myllymäki ◽  
Marko Sonkki ◽  
...  
Keyword(s):  
The Body ◽  
Antenna Design ◽  
Center Frequency ◽  
Body Measurements ◽  
Body Effect ◽  
Antenna Structure ◽  
Omnidirectional Antenna ◽  
Radiating Element ◽  
Receiving Antenna ◽  
Wireless Capsule

A recent reflector-backed antenna model is proposed in this paper for wireless capsule endoscopy localization. The antenna is designed to operate at the lowest 802.15.6 mandatory UWB (ultrawideband) channel, i.e., 4 GHz center frequency with 500 MHz bandwidth. The antenna achieves a good directivity and radiates well over the frequency band of interest. The proposed antenna was constructed within three successive steps. Initially, a planar omnidirectional antenna was designed of 3.15 dBi gain at 4 GHz. Since the antenna aims to operate as a receiving antenna, good directivity is preferred. Thus, an air-filled cavity was included backing the planar antenna to bolster the directivity toward the radiating element. The cavity-backed antenna has a measured gain of 6.4 dBi. The antenna was evaluated next to the homogenous and multilayer models. Then, the antenna design was optimized, by reducing its size, to a reflector-backed antenna structure reaching a maximum gain of 5.3 dBi, which is still promising for the regarded application. The body effect on the antenna matching was evaluated by means of multilayer and voxel models simulating the human body. This was followed by on-body measurements involving real subject. The depth of in-body propagation, from skin to small intestine, was studied using the multilayer and voxel models. Simulations were run using the CST Microwave Studio tool. While prototyping, free-space and on-body measurements took place at University of Oulu, Finland.

scholarly journals A quad-band monopole antenna with defected ground plane for L-band/WiMAX/WLAN applications

2018 ◽  
Vol 31 (4) ◽  
pp. 627-639
Author(s):  
Biplab Bag ◽  
Priyabrata Biswas ◽  
Pratim Sarkar
Keyword(s):  
Return Loss ◽  
Ground Plane ◽  
Simulation Software ◽  
Monopole Antenna ◽  
Bottom Surface ◽  
Resonant Frequencies ◽  
Radiating Element ◽  
L Band ◽  
Parametric Analyses ◽  
Defected Ground Plane

In this paper, a planar quad band monopole antenna excited by the microstrip line feed is proposed for L-band, WiMAX and WLAN applications. The proposed antenna is composed of radiating element in the form of L, U and inverted Lshaped strips on the top surface of substrate and defected ground plane on the bottom surface. By adjusting the length of the strips, the resonant frequencies can be reformed individually. The overall dimension of the prototype of the proposed quad band antenna is 50x35x1.6mm?. From the measured results it is found that the proposed antenna has exhibited four distinct operating bands (return loss less than -10dB) of 170MHz (from 1.16 to 1.33GHz), 550MHz (from 1.53 to 2.08GHz), 470MHz (from 2.43 to 2.90GHz) and 3930MHz (from 3.77 to 7.70GHz). First two bands operated in L-band, third band can be used for WiMAX lower band (2.5GHz) and bandwidth of fourth band may be used for WLAN (5.2/5.8 GHz) and WiMAX (5.5GHz) applications. It is also observed that the proposed antenna has good radiation patterns and acceptable gains over the whole operating bands. The design process and parametric analyses are explained with the help of simulation software HFSS v.11.

scholarly journals Broadband Corrugated Square-Shaped Monopole Antenna

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
S. D. Ahirwar ◽  
C. Sairam
Keyword(s):  
Monopole Antenna ◽  
Performance Characteristics ◽  
Electrical Performance ◽  
Design And Development ◽  
Lateral Dimension ◽  
Radiating Element ◽  
Planar Monopole Antenna ◽  
And Performance ◽  
Better Than

Design and development of a corrugated square-shaped monopole antenna is presented with measured results. The operational bandwidth of the antenna is 300 MHz–3000 MHz. The antenna is derived from a square-shaped planar monopole antenna. This basic square-shaped radiating element is corrugated in its lateral dimension. This corrugation reduces the lateral dimension of the antenna by 60%. Electrical performance of this antenna is better than its parent counterpart. This paper presents design and performance characteristics of conventional square-shaped monopole and its derivative, that is, broadband corrugated square-shaped monopole antenna.

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