WiMAX and C bands semi-fractal circularly polarized antenna with satellite bands filtering properties

2018 ◽  
Vol 10 (8) ◽  
pp. 978-983 ◽  
Author(s):  
T. Sedghi ◽  
T. Aribi ◽  
A. Kalami
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Ground Surface ◽  
Unit Cell ◽  
Dual Band ◽  
Satellite Systems ◽  
Directional Radiation ◽  
Cell Patterns ◽  
Feature Based ◽  
New Generation

AbstractA compact coplanar waveguide (CPW)-fed circular polarization (CP)-antenna for new generation applications with dual bands filtering performance along with CP feature based on unit-cell semi-fractal is proposed in this paper. The CP-antenna privileges from semi-fractal radiator causes to have a miniaturized size. The stopped bands are designed to suppress the interference with present WLAN and ITU-R satellite systems. These properties are obtained by embedding semi-fractal unit-cell patterns stubs at the radiator and applying two rectangular-shaped slits inside CPW ground plane and a pair of grounded L-shaped strips. By introducing the first step of semi-fractal strips, and the mirrored defected ground surface structures, dual-band rejection functionality at WLAN (5–6 GHz) and ITU-R (7.725–8.5 GHz) are practically obtained. Besides that, semi-fractal strips results to two orthogonal modes stimulation on the radiator and CP attribute are obtained at WiMAX (3.1–3.7 GHz). CP-antenna presents omni-directional radiation H-plane patterns over the applicational frequency band. The CP-antennas size is 25 mm × 25 mm and fabricated on commercially available FR4-epoxy substrate with 1 mm thickness. Measured results illustrate that the proposed ultimate CP-antenna with miniaturized structure, efficient impedance tuning characteristics, and adequate radiation performances is the best choice for new generation of wireless communications.

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 of dual band slotted reconfigurable antenna using electronic switching circuit

2021 ◽  
Vol 24 (1) ◽  
pp. 386
Author(s):  
Mustafa M. Al-Saeedi ◽  
Ahmed A. Hashim ◽  
Omer Al-Bayati ◽  
Ali Salim Rasheed ◽  
Rasool Hasan Finjan
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Local Area ◽  
Dual Band ◽  
Area Network ◽  
Radiation Patterns ◽  
Directional Radiation ◽  
Constant E ◽  
Lower Complexity

This paper proposes a dual band reconfigurable microstrip slotted antenna for supporting the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications, providing coverage where both directive and omni-directive radiations are needed. The design consists of a feedline, a ground plane with two slots and two gaps between them to provide the switching capability and a 1.6 mm thick flame retardant 4 (FR4) substrate (dielectric constant Ɛ=4.3, loss tangent δ=0.019), modeling an antenna size of 30x35x1.6 mm3. The EM simulation, which was carried out using the connected speech test (CST) studio suite 2017, generated dual wide bands of 40% (2-3 GHz) with -55 dB of S11 and 24% (5.2-6.6 GHz) higher than its predecessors with lower complexity and -60 dB of S11 in addition to the radiation pattern versatility while maintaining lower power consumption. Moreover, the antenna produced omnidirectional radiation patterns with over than 40% bandwith at 2.4 GHz and directional radiation patterns with 24% bandwith at the 5.8 GHz band. Furthermore, a comprehensive review of previously proposed designs has also been made and compared with current work.

scholarly journals A CPW-Fed Rectangular Ring Monopole Antenna for WLAN Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Sangjin Jo ◽  
Hyunjin Choi ◽  
Beomsoo Shin ◽  
Sangyeol Oh ◽  
Jaehoon Lee
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Local Area ◽  
Monopole Antenna ◽  
Dual Band ◽  
Area Network ◽  
Feed Line ◽  
Compact Size

We present a simple coplanar waveguide- (CPW-) fed rectangular ring monopole antenna designed for dual-band wireless local area network (WLAN) applications. The antenna is based on a simple structure composed of a CPW feed line and a rectangular ring. Dual-band WLAN operation can be achieved by controlling the distance between the rectangular ring and the ground plane of the CPW feed line, as well as the horizontal vertical lengths of the rectangular ring. Simulated and measured data show that the antenna has a compact size of21.4×59.4 mm2, an impedance bandwidths of 2.21–2.70 GHz and 5.04–6.03 GHz, and a reflection coefficient of less than −10 dB. The antenna also exhibits an almost omnidirectional radiation pattern. This simple compact antenna with favorable frequency characteristics therefore is attractive for applications in dual-band WLAN.

Analysis of Wideband Antenna Performance over Dual Band Artificial Magnetic Conductor (AMC) Ground Plane

2015 ◽  
Vol 735 ◽  
pp. 273-277 ◽  
Author(s):  
Raimi Dewan ◽  
M.K.A. Rahim ◽  
Mohamad Rijal Hamid ◽  
M.F.M. Yusoff
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Surface Current ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Wideband Antenna ◽  
Antenna Performance ◽  
Perfect Magnetic Conductor ◽  
Additional Resonance ◽  
Unit Cells

A Coplanar Waveguide (CPW) wideband antenna operates from 2.69 GH to 6.27 GHz which act as reference antenna (RA) has been designed. A Dual Band AMC (DBAMC) unit cells have been proposed to operate at 2.45 GHz and 5.8 GHz. AMC is a metamaterial which mimics the behavior of zero reflection phase of Perfect Magnetic Conductor (PMC) at resonance frequency which not naturally existed in nature. Subsequently the antenna is incorporated with AMC unit cell, herein referred as Antenna with Dual Band AMC (ADBAMC). The DBAMC succesfully excites additional resonance at 2.45 GHz outside the initial operating range of standalone CPW wideband antenna. Incorporation of DBAMC to antenna achieves back lobe suppression at 2.45 GHz and 5.8 GHz. The overall average gain of AMC incorporated antenna is improved from 2.69 to 6.29 GHz as opposed to the standalone reference CPW wideband antenna. Study of surface current is also presented and discussed.

Miniaturized printed monopole antenna with applying the modified conductor-backed plane and three embedded strips based on CPW for multi-band telecommunication devices

2014 ◽  
Vol 8 (8) ◽  
Author(s):  
Mohammad Alibakhshi-Kenari
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Surface ◽  
Monopole Antenna ◽  
Coaxial Cable ◽  
Dual Band ◽  
Ieee 802.11A ◽  
X Band ◽  
Printed Monopole Antenna ◽  
Printed Monopole

In this article, a new construction of a small planar dual-band fed printed monopole antenna based on coplanar waveguide is suggested. Impedance matching for dual-band operations is obtained by embedding three vertical strips with different sizes in the U-shaped conductor-backed plane. The main problem of the designed antenna is the measuring of the specifications with the Agilent 8722ES Vector Network Analyzer, when the coaxial cable is connected to the antenna. Hence, in this paper a new method for decoupling the cable from the antenna is presented. This method is based on using the ferrite bead. The ferrite bead reduces the cable radiation, so that its position plays the important part in the antenna radiation characteristics. The fabricated antenna includes the benefits of the miniaturized size and dual-band operating specifications, so that the mentioned properties have been achieved without modifying the coplanar-waveguide-ground surface or radiator patch. The antenna has the small size of 15 × 15 × 0.8 mm3and bandwidths with S11 < −10 dB about 2.2 GHz (5.05–7.25 GHz) for WLAN-band or IEEE 802.11a-band and 5.2GHz (7.6–12.8 GHz) for X-band, which correspond to 36 and 51% practical bandwidths, respectively. The antenna measured peak gains are about 1.8 dBi at WLAN-band and 4.3 dBi at X-band.

scholarly journals Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

2020 ◽  
Vol 20 (2) ◽  
pp. 115-124
Author(s):  
Dhirgham Kamal Naji
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Order Mode ◽  
Circular Patch ◽  
Area Reduction ◽  
Antenna Miniaturization ◽  
Dual Band Antenna ◽  
Simple Geometry

In this paper, a new approach is presented for designing a miniaturized microstrip patch antenna (MPA) for dual-band applications. The proposed MPA consists of a semi-circular patch radiator fed by a 50-Ω coplanar waveguide (CPW) structure with a tapered-ground plane for enhancing impedance bandwidth over the dual-band. By inserting a folded U-shaped slot into the semi-circular patch, the proposed antenna introduces an additional higher-order mode but does not modify the resonance frequency of the lower-order mode of the patch, yielding the desired dual-band response. For antenna miniaturization, the circular-shaped radiator of the reference antenna (RA) was converted into a semi-circular radiating patch. Agreement between CST and HFSS simulated results led us to manufacture a prototype of the designed antenna on one side of an inexpensive FR-4 substrate with an overall dimension of 17 × 18 × 0.8 mm<sup>3</sup>. The measured result in terms of reflection coefficient S11 confirms that the antenna operates in both 3.5 GHz (3.4–3.7 GHz) and 5.8 GHz (5.725–5.875 GHz) bands suitable for use in WiMAX and WLAN applications, respectively. Moreover, besides an area reduction of 32% compared with the RA counterpart, the proposed antenna has other features, a simple geometry, and is easy to manufacture in comparison with previously reported antenna structures.

A compact dual band-notched SWB antenna with high bandwidth dimension ratio

2020 ◽  
pp. 1-7
Author(s):  
Aliakbar Dastranj ◽  
Ghazaleh Lari ◽  
Mosayeb Bornapour
Keyword(s):  
Time Domain ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Wide Frequency Range ◽  
Dual Band ◽  
Potential Candidate ◽  
Frequency Range ◽  
High Bandwidth ◽  
Dimension Ratio ◽  
Swb Applications

Abstract In this research, a compact dual band-notched (DBN) super-wideband (SWB) coplanar waveguide-fed antenna with high bandwidth (BW) dimension ratio of 7427.4 has been presented. The proposed antenna covers a very wide frequency range from 2.8 to 40 GHz (BW ratio of 14.28:1) with |S11|<−10 dB. The overall antenna size is 20 × 14 × 1.6 mm3 which consists of an FR4 substrate with a dielectric constant of 4.4, a shovel-shaped radiating patch and the symmetric stair-shaped ground plane. The DBN characteristics are achieved by employing a pair of C-shaped and circular slots on its shovel-shaped radiating patch to reject the interferences caused by two WiMAX (3.7–4.7 GHz) and WLAN (5.7–6.4 GHz) bands. The notched frequency bands can be controlled by changing the radii of slots. The SWB property of the antenna is obtained by using a symmetric stair-shaped ground plane and also a shovel-shaped radiating patch. The measured results of the fabricated prototype in frequency-and time-domain are also presented and compared with the numerical results. The results indicate that the antenna has good performance over the entire operating BW (173.8%) which makes it very potential candidate for modern SWB applications.

scholarly journals Unidirectional Dual-Band CPW-Fed Antenna Loaded with an AMC Reflector

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Qun Luo ◽  
Huiping Tian ◽  
Zhitong Huang ◽  
Xudong Wang ◽  
Zheng Guo ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Suitable Candidate ◽  
Gain Enhancement ◽  
Low Profile ◽  
Frequency Identification

A unidirectional dual-band coplanar waveguide fed antenna (DB-CPWFA) loaded with a reflector is presented in this paper. The reflector is made of an electric ground plane, a dielectric substrate, and artificial magnetic conductor (AMC) which shows an effective dual operational bandwidth. Then, the closely spaced AMC reflector is employed under the DB-DPWFA for performance improvement including unidirectional radiation, low profile, gain enhancement, and higher front-to-back (F/B) ratio. The final antenna design exhibits an 8% and 13% impedance bandwidths for 2.45 GHz and 5.8 GHz frequency regions, respectively. The overall gain enhancement of about 4 dB is achieved. The F/B ratio is approximate to 20 dB with a 16 dB improvement. The measured results are inconsistent with the numerical values. The presented design is a suitable candidate for radio frequency identification (RFID) reader application.

Compact Design of an UWB Antenna with Dual Band-Notched Characteristic

2012 ◽  
Vol 195-196 ◽  
pp. 13-16
Author(s):  
Wen Bo Zeng ◽  
Jia Zhao ◽  
Bao Zhong Ke ◽  
Qi Qi Wu
Keyword(s):  
Frequency Band ◽  
Printed Circuit Board ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Circuit Board ◽  
Dual Band ◽  
Uwb Antenna ◽  
Compact Design

An ultra-wideband (UWB) printed antenna with dual band-notched characteristic is presented in this paper. The proposed antenna is composed of a semi-circular patch fed by a tapered coplanar waveguide (CPW) and an unclosed ground plane, which are printed onto the same side of a FR4 printed circuit board (PCB) with an overall size of 30 mm × 30 mm × 1.5 mm. By embedding a simple arc-shaped slot in the patch and adding a T-shaped strip on the top of the patch, two notched frequency bands for rejection of WiMAX and WLAN system can be realized. The characteristics of the proposed antenna are investigated by using the software HFSS and validated experimentally, both simulated and measured results show that the proposed antenna prototype achieves good impedance matching over an frequency band from 2.1011.40 GHz for VSWR2 with two notched bands over the frequency range of 5-5.95 GHz and 3.1-3.9 GHz. Furthermore, a relatively stable gain and suitable radiation patterns are also achieved in both lower and upper UWB frequency band.

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