Multiband Microstrip Antenna Research Articles

Design of Multi-band Microstrip Antenna for Wireless Communications and ITU Applications

A multi-band microstrip patch antenna for WiMAX, WLAN and ITU-Region1 applications is presented in this letter. The proposed antenna consists of FR4 substrate with dimensions of 15 × 15 × 1.6 mm3, ground plane and radiation patch that fed by 50 Ω microstrip line. This antenna with two symmetry of L-shape and U-shape slots and folded strip lines in the configuration of radiation patch, cover 3.5 GHz frequency for WiMAX, two 5.2 and 5.8 GHz frequencies bands for WLAN and 4.3 GHz for ITU-Region1 applications to consider simulated and measured results. The omnidirectional radiation pattern characteristics and −10 dB return loss for all frequencies bands are obtained in this antenna.

Design of Compact Tri-Band Fractal Antenna for RFID Readers

In this paper, a multiband and miniature rectangular microstrip antenna is designed and analyzed for Radio Frequency Identification (RFID) reader applications. The miniaturization is achieved using fractal technique and the physical parameters of the structure as well as its ground plane are optimized using CST Microwave Studio. The total area of the final structure is 71.6 x 94 mm<sup>2</sup>. The results show that the proposed antenna has good matching input impedance with a stable radiation pattern at 915 MHz, 2.45 GHz, and 5.8 GHz.

Split quadrilateral miniaturised multiband microstrip patch antenna design for modern communication system

In this study, a mixed split quadrilateral multiband microstrip antenna is designed and its measurement results in terms of different parameters are given. The proposed antenna is fed by a 50 Ω microstrip line. FR-4 (Lossy) is used as a substrate to design the recommended antenna which has a condensed structure of 0.23λ × 0.31λ. This antenna operates at C-, X-, Ku-, and K-band with moderate bandwidth because of its design and feedline. This patch antenna is designed to support models with resonances at 6.30, 7.10, 7.50, 8.70, 12.80, 17.0, and 21.30 GHz, respectively. Regarding the proposed split multiband quadrilateral antenna, results are obtained in terms of reflection coefficient, gain and radiation pattern which have admissible values of reflection coefficient of 3.0 dB. It has a reflection coefficient is −20.15 dBi and an efficiency of 86%. The prospective antenna has a compact size, good radiation characteristics and good time domain behaviour to mollify the obligation of the modern communication system.

Split quadrilateral multiband microstrip patch antenna design for modern communication system

AbstractIn this article, a mixed split quadrilateral multiband microstrip antenna is designed and its measurement results in terms of different parameters are given. This patch antenna is designed to support modes with resonances at 6.3, 7.1, 7.5, 8.7, 12.8, 17, and 21.3 GHz. FR‐4 (lossy) is used as substrate to design the recommended antenna which has a firm dimension of 11 × 15 mm2 (0.23λ × 0.31λ). This antenna operates at C, X, Ku, and K band with moderate bandwidth because of its design and feedline. This mixed quadrilateral‐shaped multiband antenna has directivity gain of 1.65, 1.26, 2.4, 3.2, 4.57, 4.03, and 3.46 dBi at resonating frequencies and is suitable for a modern communication system. The proposed split multiband quadrilateral antenna results are obtained in terms of return loss, voltage standing wave ratio (VSWR), gain, and radiation pattern which have admissible values of return loss less than −10 dB, VSWR less than 2 at each resonant frequency, and gain more than 3 dB. A suitable radiation pattern and an emerging gain make the recommended antenna suitable for the use in a modern communication system.

Design and Analysis of Staked Multiband Microstrip Antenna

Design and Analysis of Staked Multiband Microstrip Antenna

Design and study of a microstrip slot antenna operating at 2.8/3.1/3.6/4.7/5.4 GHz

A novel design of a multi band microstrip antenna is presented in this work. The double modified U slots planar patch antenna is designed, simulated and fabricated to operate at 2.8 GHz (between 2.794 to 2.846 GHz), at 3.1 GHz (between 3.145 to 3.196 GHz), at 3.6 GHz (between 3.56 to 3.3.644 GHz), at 4.7 GHz (between 4.684 to 4.772 GHz) and at 5.4 GHz (between 5.423 to 5.526 GHz) for WiMAX/WLAN applications. One of the main challenges was keeping a low profile and low cost substrate (1.2mm and FR4 respectively) with penta-band frequency response without scarifying these characteristics. Each resonant frequency is accomplished by modifying each U slot and patch radiator itself. Simulations had been conducted using HFSS software and measured parameters such as reflection coefficient (S11 parameter) was performed with a vector network analyzer. Measured results confirm simulated results that the antenna could work within mentioned frequencies. Parametric study was conducted in order to study the effect of slots variation over the design.

Design and Simulation of Multiband Microstrip Antenna Fed by SMA Coaxial Probe Technique for Wireless Communication

Design and Simulation of Multiband Microstrip Antenna Fed by SMA Coaxial Probe Technique for Wireless Communication

Design of Compact Penta-Band and Hexa-Band Microstrip Antennas

AbstractThis paper presents the design of two multi-band microstrip antennas. The antenna-1 gives Penta-Band and antenna-2 gives Hexa-band in the WLAN band. The frequency bands of the antenna-1 are Bluetooth 2.47 GHz (2.43 GHz–2.54 GHz), WiMax band 3.73 GHz (3.71 GHz–3.77 GHz), WLAN 5.1 GHz (4.99 GHz–5.13 GHz), upper WLAN 6.36 GHz (6.29 GHz–6.43 GHz), C band band 7.42 GHz (7.32 GHz–7.50 GHz) and the antenna-2 are WLAN band 2.6 GHz (2.56 GHz–2.63 GHz), 3.0 GHz (2.94 GHz–3.05 GHz), WiMax band 3.4 GHz (3.34 GHz–3.55 GHz), 4.85 GHz (4.81 GHz–4.92 GHz), WLAN 5.3 GHz (5.27 GHz–5.34 GHz) and upper WLAN 6.88 GHz. Both the antennas are fabricated and their measured results are presented to validate the simulated results. Proposed antennas have compact sizes and good radiation performances.

CPW FED Multiband Metamaterial Antenna for Wireless Applications

A novel approach for the design of a multiband co-planar microstrip antenna is presented. This antenna is comprises of composite metamaterial resonators and fed by signal feed. An antenna with composite closed hexagonal-ring resonator and split-ring resonator (SRR) fed by coplanar waveguide (CPW) developed on FR4 epoxy substrate for multi-band wireless communication applications is presented. The design of the composite structure resulted in four discontinuous resonant bands. The numerical results show that the proposed antenna has good impedance bandwidth and radiation characteristics in the four operating bands 3.37–3.94 GHz, 6.98–7.74 GHz, 8.98–9.9 GHz, 13.83–15.82 GHz with return loss of better than 10 dB.

A compact multiband microstrip antenna using complementary slots on the ground plane

In this article, initially a multiband antenna has been designed using two identical slots on the patch surface. The slotted antenna resonates at three different frequencies of 3.35 GHz, 4.5 GHz and 5.5 GHz bands, respectively. Finally, complementary slots have been introduced on the ground plane and all three separate bands have been combined to a single band. As a result, a wide band antenna of bandwidth 3.10 GHz is obtained. The key contribution of this article is the conversion of multiband to wide band using complementary slots on the ground plane. The characteristics analyses of the antenna have been done numerically using IE3D EM simulator and the measurements have been performed with the help N5230A network analyzer (Agilent make) and fully automated anechoic chamber. A parametric study has been conducted to optimize the performances at different frequencies. Prototype antennas with slots have been fabricated, measured, and a remarkable agreement is obtained between the measured and the simulated results. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:47–51, 2016

A Comparative study of Proximity-Coupled Multiband Microstrip Antenna and Multimode Reduced Surface Wave Antenna

paper shows the comparative study of proximity-coupled feed, used for a multiband microstrip antenna (MMA) and multimode reduced surface-wave antenna based on the shorted-annular-ring reduced-surface-wave (SAR-RSW) element and the inverted-SAR-RSW ((ISAR-RSW) element. Microstrip antenna operates in four bands - WiMAX (3.3-3.7 GHz), LTE2300 (2300-2400 MHz), Bluetooth (2400-2485 MHz), and WLAN (5.15-5.35 GHz, 5.725-5.825 GHz). Microstrip antenna has excellent radiation features along with a steady gain over the operating bands. Multimode reduced- surface-wave antenna has a reduced return-loss bandwidth of less than 10-dB. Its range of operation is 1.164-1.255 and 1.552-1.610 GHz, a 3-dB axial-ratio bandwidth from 1.16 to 1.26 GHz and from 1.54 to 1.61 GHz. It produces a larger than 7-dBi gain in the entire operating band. To increase the impedance bandwidth, the multimode reduced-surface-wave antenna implements the proximity-coupled probe feeds. In order to restrain the mutual coupling between the SAR-RSW and ISAR-RSW elements, the defected ground structure band- rejection filters are implemented. Keywordsantenna, multiband, proximity feed, Microstrip antenna, Reduced surface wave element.

Poly Fractal Boundary Circularly Polarised Microstrip Antenna for WLAN/Wi-MAX Wireless Applications

<p class="MsoNormal" style="text-align: justify;">The design of circularly polarised multiband poly fractal boundary microstrip antenna is proposed and experimentally studied. Initially the two orthogonal sides of the square patch are replaced with different fractal curves for circular polarisation (CP) radiation. Along the x and y axes, Minkowski and Koch fractal curves are employed. A 45° rotated poly fractal slot is embedded at the center of the fractal patch for triband CP operation. The indentation depths and indentation angles of the Minkowski and Koch fractal curves are optimised for better CP emission. The inserted fractal slot redistributes the current elements on the patch for tri band CP radiation. The measured 3-dB axial ratio bandwidths of the proposed antenna at 2.4 GHz, 3.4 GHz, and 5.8 GHz are 1.53 per cent, 0.81 per cent, and 1.62 per cent respectively, making it an able candidate for WLAN and Wi-MAX wireless applications.</p>

Metasurface Reflector (MSR) Loading for High Performance Small Microstrip Antenna Design.

A meander stripline feed multiband microstrip antenna loaded with metasurface reflector (MSR) structure has been designed, analyzed and constructed that offers the wireless communication services for UHF/microwave RFID and WLAN/WiMAX applications. The proposed MSR assimilated antenna comprises planar straight forward design of circular shaped radiator with horizontal slots on it and 2D metasurface formed by the periodic square metallic element that resembles the behavior of metamaterials. A custom made high dielectric bio-plastic substrate (ε r = 15) is used for fabricating the prototype of the MSR embedded planar monopole antenna. The details of the design progress through numerical simulations and experimental results are presented and discussed accordingly. The measured impedance bandwidth, radiation patterns and gain of the proposed MSR integrated antenna are compared with the obtained results from numerical simulation, and a good compliance can be observed between them. The investigation shows that utilization of MSR structure has significantly broadened the -10dB impedance bandwidth than the conventional patch antenna: from 540 to 632 MHz (17%), 467 to 606 MHz (29%) and 758 MHz to 1062 MHz (40%) for three distinct operating bands centered at 0.9, 3.5 and 5.5 GHz. Additionally, due to the assimilation of MSR, the overall realized gains have been upgraded to a higher value of 3.62 dBi, 6.09 dBi and 8.6 dBi for lower, middle and upper frequency band respectively. The measured radiation patterns, impedance bandwidths (S11<-10 dB) and gains from the MSR loaded antenna prototype exhibit reasonable characteristics that can satisfy the requirements of UHF/microwave (5.8 GHz) RFID, WiMAX (3.5/5.5 GHz) and WLAN (5.2/5.8 GHz) applications.

Proximity-Coupled Multiband Microstrip Antenna for Wireless Applications

This letter presents a new design of a multiband microstrip antenna with a proximity-coupled feed for operating in the LTE2300 (2300–2400 MHz), Bluetooth (2400–2485 MHz), WiMAX (3.3–3.7 GHz), and WLAN (5.15–5.35 GHz, 5.725–5.825 GHz) bands. In addition, it also covers 6-dB impedance bandwidth across the UMTS (1920–2170 MHz) band. The proposed antenna consists of a corner-truncated rectangular patch with a rectangular slot, meandered microstrip feed, and defected ground plane. The antenna is fabricated using 0.8-mm-thick FR4 substrate with a dielectric constant of 4.4 and has a small size of only <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$27\times 24~\hbox{mm}^{2}$</tex> </formula> . The antenna shows a stable gain over the operating bands and good radiation characteristics. The simulated and measured results are shown to have good agreements.

Multiband-coupled sectoral antenna using high and low dielectric constant substrates

Design analysis of multiband-coupled stacked sectoral antenna array with finite ground plane using high low dielectric constant substrates is proposed in this paper for modern communication systems and applied physics. Multiband planar antennas have been extensively developed due to demands for integration of wireless communication systems. In this paper, we present the design and development of a multiband microstrip antenna array with parasitic coupling and stacking using two different substrates. The stacked designed antenna resonates at three different frequencies: 3.8, 5.4, and 10 GHz; therefore, showing a multiband property with good radiation (far-field) characteristics. A significant comparison study is also presented considering different dielectric constant substrates. The proposed antenna is an attractive solution for different wireless communication systems such as mobile systems, satellite systems, etc.

DESIGN AND SIMULATION OF SIERPINSKI CARPET FRACTAL ANTENNA AND COMPARISION OF DIFFERENT FEEDS

The rapid growth in wireless communication has led to need of antennas with increased bandwidth, high gain and low profile. In this paper, a multi band microstrip antenna is designed by applying fractal concept to a rectangular microstrip antenna. The antennas properties gain, and return loss, are studied to achieve better performance. The designed antenna is compared for different feeding techniques and the results are analyzed. This antenna is designed and simulated by using HFSS software.

ANALYSIS OF ELEMENT SHAPE IN THE DESIGN FOR MULTI-BAND APPLICATIONS

A novel compact multi-band microstrip antenna is proposed in this paper. The antenna structure is made to resonate at multiple frequencies by introducing two small rectangular strips attached vertically at the edge of a conventional rectangular patch antenna. The designed antenna resonates at S and C bands. The final optimized dimensions of the basic rectangular patch antenna are 40 x 15 mm and two rectangular strip lines are spaced at 2.5 mm with different dimensions. The simulated antenna shows that the return loss of the proposed antenna at resonant modes are lower than -10 dB. For multi-band applications, the simulation results provide good performance in term of return loss as well as radiation pattern.

Multiband antenna structure for heterogeneous wireless communication systems using DGS technique

This proposed work illustrates the design of a defected ground structure (DGS)-based coplanar waveguide (CPW)-fed multiband microstrip antenna consisting of four vertical monopoles, joined together by the few rectangular horizontal strips. In this multiband antenna, I-shaped defects are inserted into both sides of ground plane of CPW feed creating a DGS-CPW. The 10 dB impedance bandwidth of lower band is 29%, ranging from 2.232 to 3.1 GHz, with respect to the central frequency of 2.52 GHz, and while that of the upper band is 2.1 GHz (4.712–6.81 GHz), about 35%, referred to the central frequency of 5.7 GHz. The parametric study is performed to understand the characteristics of the proposed antenna. To verify the simulated design concept, a prototype antenna is designed and fabricated on the FR4 substrate, and characterized experimentally. The characteristic of antenna parameters such as S-parameter, gain, current distribution, and radiation pattern have been studied. The proposed antenna is suitable for WLAN/WiMAX applications.

Compact Multiband Microstrip Antenna Using Inverted-L- and T-Shaped Parasitic Elements

By placing inverted-L- and T-shaped parasitic elements at both the radiating apertures of a microstrip patch antenna, a low-profile, compact single-layer multiband microstrip antenna operable in various bands has been developed. These bands include LTE TDD No. 34 (2.0175 GHz), WLAN (2.45 GHz), and WiMAX (3.5 GHz) bands. The antenna has dimensions of 0.26 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</sub> ×0.25 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</sub> ×0.03 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</sub> , where λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</sub> is the free-space wavelength at 2.0175 GHz, and resonance in the parasitic elements occurs through coupling and perturbations to the microstrip patch. In each band, the measured -10-dB bandwidths cover the required bandwidths at 28 MHz (1.39%), 91 MHz (3.71%), and 255 MHz (7.29%). Within each of the designed bands, a broadside radiation pattern is observed.

Circularly Polarized Multiband Microstrip Antenna Using the Square and Giuseppe Peano Fractals

By computer simulation and actual fabrication, it is demonstrated that multiband operation with circular polarization of radiation may be achieved by the combination of square and Giuseppe Peano fractal geometries realized on a two layer microstrip antenna. The antenna feed is designed by an electromagnetic coupling system. The proposed antenna configuration also achieves some degree of miniaturization, which makes it suitable for wireless applications. The antenna characteristics, such as return loss, axial ratio and radiation patterns achieved by the proposed structure attest to its effectiveness as a mobile radiator.