Antenna For Wireless Applications Research Articles

Design and performance analysis of compact quad‐band two‐port sickle‐shaped MIMO antenna for wireless applications

AbstractIn this research, a quad‐band sickle‐shaped MIMO antenna of compact size 32 × 32 mm2 (0.28λ0 × 0.28λ0 at lower resonant frequency 2.6 GHz) has been proposed using partial ground and tilted isolation stub at an angle of 45°. It covers 2.40 to 2.80 GHz frequency range with bandwidth (BW) of 15.38% (0.40 GHz) which is applicable for Wi‐Fi application in first band and in second band it covers from 4.48 to 5.75 GHz frequency range with BW of 24.83% (1.27 GHz) for WLAN application. In addition, the third band starts from 9.75 to 10.43 GHz frequency range with BW of 6.74% (0.68 GHz) for the X‐band whereas in fourth band it covers from 13.07 to 15.87 GHz frequency range with BW of 19.38% (2.8 GHz) frequency, which is applicable on Ku‐band application. Moreover, the isolation is < −15 dB in the entire resonating frequency band which is an acceptable limit for reduction of mutual coupling. ECC value is <0.5 in the entire operating band of frequency. The diversity gain of the proposed MIMO antenna is approximately 9.96 dB that shows the antenna exhibits good diversity property. The channel capacity loss value is <0.4 bps/s/Hz in the entire resonating band. In view of all the diversity parameters, the proposed MIMO structure fulfills all the requirements of the MIMO antenna.

AN ASYMMETRICAL PSI-SHAPED MULTIBAND ANTENNA FOR WIRELESS APPLICATIONS

In this article, a low-profile multiband asymmetrical psi-shaped antenna for different wireless applications is presented and analyzed. This multiband antenna consists of an asymmetrical psi-shaped radiator considered on a single layer FR4 substrate with compact dimensions. The better impedance matching characteristics between the radiating element and the signal source are obtained by employing a slotted structure. The designed antenna operates at six different frequency bands of 1.8-2.03 GHz [GSM1800, personal communication systems (PCS)], 4.64-5.35 GHz [wireless local area network (WLAN)], 6.05-6.95 GHz (C-band), 7.92-8.59 GHz (military), 9.55-11.14 GHz [fixed satellite service (FSS)], and 11.57-12.29 GHz (DBS) while the S<sub>11 </sub>value is lower than -10 dB. The Ansoft HFSS 21 electromagnetic simulator is employed to optimize the antenna dimensions and study the antenna functionality at the six different frequency bands. The designed antenna exhibits higher gain at six frequency bands. The developed multiband antenna is prototyped, and test results are generated to validate its performance. The simulation results authenticate acceptable agreement with the measurement results. This antenna is a good choice for GSM1800, PCS, WLAN, C-band, FSS, and military defense applications.

A Novel Shaped Four Port MIMO Antenna for Wireless Communication

This paper presents a compact novel shaped micro strip line fed four element Multiple Input Multiple Output (MIMO) antenna for wireless application at 2.4 GHz. Four vertically oriented identical rectangular patch antennas are used to form a hollow cylinder of rectangular cross section. The direction of radiation of each antenna is thus oriented at 900 with respect to its two adjacent antennas providing good isolation between adjacent antennas in this compact MIMO system. Each antenna element has the dimensions of 0.30λx0.38λx0.012λ. The whole MIMO antenna has the outer dimensions of 0.38λx0.38λx0.30λ. The uniqueness of the proposed MIMO antenna is that the inner space of the hollow cylindrical structure can be used for hosting the associated signal processing unit of the whole system. Performance parameters of the proposed MIMO antenna are investigated using Computer Simulation Technology (CST). Envelope Correlation Coefficient (ECC) less than 0.033 and almost 10dB Diversity Gain (DG) are obtained at 2.4 GHz for this simple and compact antenna system. Ratio of Mean Effective Gain (MEG) of any two antennas is less than 0.02dB. Performance parameters of the proposed MIMO antenna system are compared with similar types of antennas found in recent literature.

A Quadruple Notch UWB Antenna with Decagonal Radiator and Sierpinski Square Fractal Slots

A novel quadruple-notch UWB (ultrawideband) antenna for wireless applications is presented. The antenna consists of a decagonal-shaped radiating part with Sierpinski square fractal slots up to iteration 3. The ground part is truncated and loaded with stubs and slots. Each individual stub at the ground plane creates/controls a particular notch band. Initially, a UWB antenna is designed with the help of truncation at the ground plane. Miniaturization in this design is achieved with the help of Sierpinski square fractal slots. Additionally, these slots help improve the UWB impedance bandwidth. This design is then extended to achieve a quadruple notch by loading the ground with various rectangular-shaped stubs. The final antenna shows the UWB range from 4.21 to 13.92 GHz and notch frequencies at 5.02 GHz (C-band), 7.8 GHz (satellite band), 9.03, and 10.86 GHz (X-band). The simulated and measured results are nearly identical, which shows the efficacy of the proposed design.

ENG‐TL inspired dual‐polarized antenna using curved meander, two‐arm Archimedean spirals and CSRR mushroom

AbstractThis work describes the design and development of a dual‐band and dual‐polarized epsilon‐negative transmission line‐inspired antenna for wireless applications. In the proposed antenna, the implementation of curved meander lines results in antenna miniaturization; bandwidth enhancement is mainly due to the additional loading of complementary split‐ring resonator‐based mushroom resonator. Further, circular polarization radiation is obtained due to the additional loading of two‐arm Archimedean spiral resonators in the backside of the antenna forming a hybrid metamaterial structure. The proposed dual‐polarized antenna provides an overall electrical dimension of 0.17λ0 × 0.25λ0 × 0.026λ0 at the first resonating frequency of 2.49 GHz. The proposed antenna provides a fractional bandwidth of 7.22% (2.40–2.58 GHz) and 1.13% (2.62–2.65 GHz) for the first and second bands, respectively. Furthermore, the intended antenna provides maximum gain values of 1.28 dBi at 2.41 GHz and 1.94 dBi at 2.64 GHz for the first and second bands, respectively. As a result, the proposed antenna is well suited for ISM 2.4 GHz (2.4–2.484 GHz), WLAN/WiFi IEEE 802.11 b/g/n (2.4–2.48 GHz) and LTE 2500 (2.5–2.69 GHz) applications.

Design and Development of Microstrip Antenna for Wireless Applications

The plan of microstrip Antenna with conservative size is recommended for remote correspondence. the microstrip recieving wire is a minimized variety of customary microstrip radio wire. The electromagnetically coupled feed from the lower layer is utilized to energize the proposed recieving wire. The full recurrence of the proposed recieving wire is lower than that of the customary microstrip recieving wire of same actual size. The addition of the recieving wire can be expanded by utilizing a parasitic component over the fundamental radiator and fixed with the spacer of ideal level. The reenactment investigation of different boundaries of the planned recieving wire is finished in Advance Design System electromagnetic EM test system.

Highly Compact GCPW-Fed Multi-Branch Structure Multi-Band Antenna for Wireless Applications

In this work, we present a highly compact multi-branch structure multi-band antenna with a grounded coplanar waveguide (GCPW)-fed structure printed on 26 × 13 × 1.6 mm 3 sized FR-4 substrate having dielectric constant ε r of 4.3 and loss tangent δ of 0.02. In the proposed antenna, five branches are extended from the main radiator to provide multi-band behavior. Two branches are introduced at the upper end of the main radiator, effectively covering the lower bands, while the other three branches are introduced near the center of the main radiator to extend operation to higher bands. The designed antenna covers five different bands: 2.4 GHz, 4.5 GHz, 5.5 GHz, 6.5 GHz, and 7.8 GHz, with respective gain values of 1.34, 1.60, 1.83, 1.80, and 3.50 dBi and respective radiation efficiency values of 90, 88, 84, 75, and 89%. The antenna shows a good impedance bandwidth, ranging from 170 MHz to 3070 MHz. The proposed antenna is simulated in CST Microwave Studio, while its performance is experimentally validated by the fabrication and testing process. The antenna has potential applications for IoT, sub-6 GHz 5G and WLAN (both enablers for IoT), C-band, and X-band services.

Multiband Microstrip Patch Antenna for Wireless Applications

The project is named “ Multiband Microstrip Patch Antenna For Wireless Applications ” Multiband phased array antennas used in today's multi- function communication applications. Generally microstrip antenna arrays like the kotch array and sierpinski array are used but in some circuits where space is limited and arrays are not used. Therefore to achieve the multiband operation with limited space an antenna is designed E-shaped in combination with a split ring resonator to achieve the multiband operation. The simulation and experimental results show that the projected antenna operates at four different frequencies, 1.8GHz, 3.6GHz, 4.53GHz, and 5.73GHz, which can be used for various wireless applications like GSM 1800 (1.71– 1.78 GHz), Wi-MAX (3.4-3.69GHz) - IEEE 802.16 standards, Wi-Fi/WLAN (5.15-5.82 GHz). All the simulation outputs like resonant frequency, return loss, radiation patterns and fabricated antenna measured result is presented in this paper. The antenna is simulated using CST 2014 software.

Bandwidth Enhancement of an Inverted F-Shape Notch Loaded Rectangular Microstrip Patch Antenna for Wireless Applications in L and S-band

Bandwidth Enhancement of an Inverted F-Shape Notch Loaded Rectangular Microstrip Patch Antenna for Wireless Applications in L and S-band

Quad‐band circularly polarized super‐wideband MIMO antenna for wireless applications

In this article, a Super-wideband (2.6–22 GHz) two-elements multiple-input-multiple-output antenna (MIMO) is presented with a dimension of 49 × 54.5 × 1.6 mm3 on an FR-4 substrate. The antenna is also exhibited dual circular polarization (RHCP and LHCP) simultaneously at two separate ports at four frequencies of 5.2, 11.5, 14.66, and 16.75 GHz, which are extensively utilized for WLAN, X, and Ku-band applications. Four EBG cells of various sizes have been installed across the feed line to maintain the antenna's efficiency and control the specific absorption rate (SAR). The antenna has a minimum isolation of 17 dB (20 dB for the important portion) in Super-wideband (SWB) and excellent diversity performance. Simulated results of antenna-like return loss, isolation, and diversity parameters have also been verified experimentally, which are in the acceptable range. Also, the calculated maximum SAR at 10 g is 1.095 W/kg with the head voxel model at 3.5 GHz.

Dual-Band and Dual Polarized Inverted Pentagonal Shaped Hybrid Cylindrical Dielectric Resonator Antenna for Wireless Applications

Dual-Band and Dual Polarized Inverted Pentagonal Shaped Hybrid Cylindrical Dielectric Resonator Antenna for Wireless Applications

DESIGN AND FABRICATION OF AN IMPROVED UHF U-NOTCHED QUASI-YAGI LOG-PERIODIC ANTENNA FOR WIRELESS APPLICATIONS

DESIGN AND FABRICATION OF AN IMPROVED UHF U-NOTCHED QUASI-YAGI LOG-PERIODIC ANTENNA FOR WIRELESS APPLICATIONS

Metamaterial Circularly Polarized Antennas: Integrating an epsilon negative transmission line and single split ring-type resonator

This article discusses the future possibilities and analysis of metamaterial (MTM)-based compact circularly polarized (CP) antennas for wireless applications. Here an effective method is introduced for designing a simple and efficient MTM CP antennas by integrating with an epsilon negative (ENG) transmission line (TL) and single split ring (SSR)-type resonator. For improving the radiation characteristics, a compact size artificial magnetic conductor metasurface (AMC-MS) without via is loaded with the intended ENG TL-based radiator antenna as a ground plane. The novelty of this kind of ENG TL-based CP antenna with AMC-MS is discussed for the first time in the literature and further image theory concept is applied for finding the driving point impedance. This kind of design is suitable for all frequencies by proper optimization and scaling. The radiating element of the intended antenna acquires a smaller area due to its zeroth-order resonance (ZOR) property with dimension of 0.26 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.16 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> at 3.5 GHz with an overall dimension with AMC-MS are 0.51 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.51 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.16 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> at 3.5 GHz. The measured results of the antenna show an impedance bandwidth of 16.36% and a CP bandwidth of 11.93%. The antenna shows a gain of 5.62 dBic and average radiation efficiency of 72.1% along the frequency band.

Cone Shaped Multiband Antenna for Wireless Applications

In this paper multi-band microstrip-fed monopole antenna is proposed to apply Satellite communication, GSM 860 &amp; GSM 1800. A cone-shaped defected patch antenna with the reduced ground plane is proposed to build a multi-band antenna. Because of the defective patch, the antenna resonating in triple bands 860MHz, 1.8GHz &amp;2. 1GHz.The size of the antenna is 72*1.6*100 mm3. The antenna simulation is done on CST software using FR-4 substrate.

Directivity Enhancement in UWB Microstrip Patch Antenna

A portable Ultra Wideband (UWB) antenna for wireless applications. The ground plane of the intended antenna seems to have an extra open-ended inverted slot. The antenna has a good radiation pattern, propagation pattern, impedance bandwidth, and gain, and it can operate in the frequency range of 3.1-10.6 GHz, which is perfect for UWB applications. The antenna is small, measuring 38.87 × 24.00 mm2. The proposed antenna is ideal for wireless applications because of these features.

Design and experimental verification of compact dual‐element quasi‐self‐complementary ultra‐wideband multiple‐input multiple‐output antenna for wireless applications

AbstractIn this article, a compact dual‐element quasi‐self‐complementary (QSC) multiple‐input multiple‐output (MIMO) antenna for ultra‐wideband (UWB) communication is presented. The overall area of the antenna is 32 × 39 mm2 (0.26 λl × 0.31 λl, where, λl is at lowest cutoff frequency) which is designed on low cost FR‐4 substrate. It has two half‐cut flower shaped (HCFS) radiators on its top which is formed by merging four ellipses of same eccentricity and then splitted in two halves at the center. On the other side, quasi‐self‐complementary phenomenon is introduced via etching slots which are complement to the radiator's shape. Also, a rectangular slit on the ground plane just below the feed line improves impedance matching. The proposed antenna operates in the range of frequencies 2.43GHz to 11.2GHz with high inter‐port isolation of greater than ‐19 dB over entire frequency of interest. Moreover, the stability of the design is validated in terms of diversity parameters [envelop correlation coefficients (ECC), channel capacity loss (CCL), mean effective gain (MEG), and Effective diversity gain (EDG)] and radiation parameters which makes it suitable for UWB‐MIMO wireless application.

Study on Bandwidth Improvement Methods of Microstrip Antennas for Wireless Applications

Study on Bandwidth Improvement Methods of Microstrip Antennas for Wireless Applications

A compact circularly polarized modified printed monopole antenna for wireless applications

ABSTRACT In this article, a new compact Circularly Polarized Antenna with wide operating bandwidth is proposed. The proposed structure consists of a Modified Circular Split Ring Resonator (MCSRR) as the radiating patch, which is fed by coplanar waveguide and loaded with 2 × 2 closed-ring resonantor (CRR) array on its FR4 epoxy substrate. The dimensions of the antenna are 0.329 λo x 0.329 λo x 0.024 λo (λo stands for the free space wavelength at center frequency of 4.94 GHz).The implementation CRR on modified printed monopole antenna leads to a wide measured impedance bandwidth of 2726 MHz with a peak gain of 5.09dBi and efficiency of 96.3% in the operating bandwidth. A prominent feature of the proposed antenna is that dual 3-dB axial ratio bandwidth of 430 MHz and 670 MHz is observed in the operating band, and thus, making it to be a promising candidate for recent day wireless applications. The simulated results was verified by measuring the characteristics of the fabricated antenna; the obtained results showed a good matching with the simulated results.

Compact Dual Band Microstrip Patch Antenna for Wireless Applications with Enhanced Bandwidth

Compact Dual Band Microstrip Patch Antenna for Wireless Applications with Enhanced Bandwidth

A closed modified V-shaped uniplanar triple band ACS fed antenna for wireless applications

In the proposed paper, a uniplanar asymmetric coplanar strip (ACS) fed antenna with closed V-shaped radiating patch of size printed on FR4 substrate with loss tangent ( =0.02, height (h)=1.6mm, and dielectric constant of 4.4 covering WiMAX, X-band and WLAN applications is presented. The proposed closed V-shaped radiating patch is formed by joning two rectangular stubs. The resultant shape of the radiating patch is obtained by adding rectangular strips to feed line until desired multiband results are achieved. The advantage of this structure is that it forms simple configuration as well as helps the overall antenna in attaining three distinict useful frequency band with good impedance matching for S11-10 dB criteria. The proposed ACS fed antenna operates at 3.1 (WiMAX), 5.0 (WLAN) and 9.9 (X-band) GHz with impedance bandwidth ranging from 2.7-3.9 GHz, 4.4-5.5 GHz and 9.5-10.3 GHz in simulation. Under measurement the proposed antenna shows multiband phenomenon at 3.2, 5.3 and 9.7 GHz with impedance bandwidth ranging from 2.8-3.7 GHz, 4.6-5.4 GHz and 9.4-10 GHz, respectively. The antenna exhibits simulated gain of 2.51, 1.18 and 1.96 dB at the corresponding frequency bands of 3.1, 5.0 and 9.9 GHz. The key parameters of the antenna like length and width of the multi-branched strips are optimized to get the multiband operation. The deisign simulation is carried out in Ansys HFSS (High frequency Simulation Software) where different characteristics of the proposed antenna are investigated. The evolution and optimization process is dealt in detail with the help of S11, VSWR, current distributions, radiation patterns and gain.