Proposal of Small Broadband Antennas with Improved Return Loss and Radiation Pattern

2006 ◽  
Author(s):  
F. Hoshi ◽  
S. Sugawara ◽  
K. Adachi ◽  
T. Minewaki
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Broadband Antennas

MULTIBAND CPW-FED SLOT ANTENNA FOR WLAN/WIMAX APPLICATIONS

2015 ◽  
Vol 77 (10) ◽  
Author(s):  
Igbafe Orikumhi ◽  
Mohamad Rijal Hamid ◽  
Ali Nyangwarimam Obadiah
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Slot Antenna ◽  
Frequency Range ◽  
Resonant Frequencies ◽  
Good Agreement

A square slot antenna fed by a coplanar waveguide (CPW) is presented in this paper. The design consist of two pairs of “F” shaped planar strips placed within a square slotted ground. The strips are used to excite multiple resonant frequencies, the strips are connected to the ground plane by means of ideal switches. The proposed antenna has achieved multiple resonant frequencies of 2.4/5.2/5.8 GHz for WLAN and 3.5/5.5 for WiMAX applications. The measured results shows a good agreement with the simulated results in terms of return loss, radiation pattern and gain. The proposed antenna is designed for the frequency range of 2 GHz to 7 GHz which makes it suitable for Bluetooth, WLAN and WiMAX applications. 

scholarly journals Performance Comparison of Swastika and Rectangular Shaped Microstrip Patch Antenna

2018 ◽  
Vol 1 (1) ◽  
pp. 11-14
Author(s):  
Suroj Burlakoti ◽  
Prakash Rai
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Performance Comparison ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch

In this paper, Microstrip patch antennas with rectangular and swastika shape of patch are designed and its performance parameters are compared with each other. Rectangular and Swastika shaped patch are considered in this paper with common rectangular ground plane. The antenna is simulated at 2.4 GHz using HFSS simulation software. This work mainly includes modification of antenna patch to improve the antenna parameters. The parameters of antenna such as Return loss, VSWR Bandwidth and radiation pattern are compared using simulation. The performance of Swastika shaped antenna was found to be better than rectangular shaped microstrip patch antenna with improved Return Loss, VSWR, Bandwidth and Radiation Pattern.

scholarly journals A Compact ACS-Fed Tri-band Microstrip Monopole Antenna for WLAN/WiMAX Applications

2018 ◽  
Vol 7 (5) ◽  
pp. 87-93 ◽  
Author(s):  
D. Kahina ◽  
C. Mouloud ◽  
D. Mokrane ◽  
M. Faiza ◽  
A. Rabia
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Simple Structure ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Radiation Patterns ◽  
Total Size ◽  
Resonant Frequencies ◽  
Compact Size ◽  
Microstrip Monopole Antenna

This paper proposes a novel small asymmetric coplanar strip (ACS) fed tri-band monopole antenna for WLAN and WiMAX applications. To tune and create multiple resonant frequencies, the exciting strip of monopole antenna is connected to two different arms which are a J-shaped directed toward the asymmetric ground plane and an open stub. The proposed monopole antenna with a total size of 14.6 x17.5 mm2 is fabricated and tested. The measured results indicate that the antenna has impedance bandwidths for 10-dB return loss reach about 500 MHz (2.01-2.52 GHz), 230 MHz (3.48-3.71 GHz) and 1.2GHz (5.59-6.72 GHz) which cover widely the 2.4/5.8 GHz WLAN bands and the 3.5GHz WiMAX band. The simulated radiation patterns of the proposed antenna at the three resonant frequencies have a dipole-like radiation pattern in both E-and H-Planes. The compact size, the simple structure and good radiation performances of the proposed antenna makes it well-suited forthe intended applications.

scholarly journals Rancang Bangun Antena Mikrostrip Bowtie Pada Frekuensi 5,2 Ghz

2018 ◽  
Vol 10 (2) ◽  
pp. 15-21
Author(s):  
Aprinal Adila Asril ◽  
Lifwarda Lifwarda ◽  
Yul Antonisfia
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Resonance Frequency ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Narrow Bandwidth ◽  
Simple Materials

Microstrip antennas are very concerned shapes and sizes. Can be viewed in terms of simple materials, shapes, sizes and dimensions smaller antennae, the price of production is cheaper and able to provide a reasonably good performance, in addition to having many advantages, the microstrip antenna also has its drawbacks one of which is a narrow bandwidth. In this research will be designed a microstrip antenna bowtie which works at a frequency of 5.2 GHz which has a size of 68mm x 33mm groundplane. For the length and width of 33mm x 13mm patch. This antenna is designed on a printed cicuit board (PCB) FR4 epoxy with a dielectric constant of 4.7 and has a thickness of 1,6mm. This bowtie microstrip antenna design using IE3D software. This antenna has been simulated using IE3D software showed its resonance frequency is 5.270 GHz with a return loss -23 595 dB bandwidth of 230 MHz, VSWR 1,142, unidirectional radiation pattern and impedance 43,919Ω. The results of which have been successfully fabricated antenna with a resonant frequency of 5.21 GHz with a return loss -16.813 dB bandwidth of 79 MHz, VSWR 1.368, unidirectional radiation pattern, impedance 43,546Ω and HPBW 105 °.

scholarly journals Desain Antena Mikrostrip Rectangular Patch Array 1x2 dengan U-Slot Frekuensi 28 GHz

2019 ◽  
Vol 7 (1) ◽  
pp. 43
Author(s):  
FAJAR WAHYU ARDIANTO ◽  
SETYAWAN RENALDY ◽  
FARHAN FATHIR LANANG ◽  
TRASMA YUNITA
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Network Capacity ◽  
Antenna Design ◽  
User Needs ◽  
Antenna Gain ◽  
Rectangular Patch ◽  
Narrow Bandwidth ◽  
Small Gain

ABSTRAKKebutuhan pengguna yang semakin meningkat harus diimbangi dengan peningkatan kecepatan data dan kapasitas suatu jaringan, sehingga diperlukan bandwidth yang lebar. 5G merupakan salah satu teknologi yang akan diresmikan tahun 2020 yang menjadi solusi terhadap peningkatan kecepatan data dan kapasitas layanan. Salah satu kandidat yang menjadi frekuensi kerja 5G yaitu 28 GHz. Antena mikrostrip merupakan salah satu jenis antena yang dapat digunakan untuk teknologi 5G. Namun, antena mikrostrip memiliki beberapa kekurangan, diantaranya bandwidth dan gain yang kecil. Untuk itu, dibutuhkan teknik yang dapat meningkatkan bandwidth dan gain antena. Pada penelitian ini dirancang antena mikrostrip bentuk rectangular patch yang ditambahkan slot berbentuk U dengan tujuan meningkatkan bandwidth dan disusun secara array 1×2 untuk meningkatkan gain antena. Hasil dari simulasi didapatkan antena mampu bekerja pada rentang frekuensi 27,5 GHz – 29,12 GHz pada batas return loss kurang dari -15 dB dengan bandwidth sebesar 1,62 GHz. Nilai gain yang dihasilkan sebesar 7,52 dB. Pola radiasi yang dihasilkan, yaitu unidireksional dan berpolarisasi secara linear.Kata kunci: 5G, 28 GHz, mikrostrip, rectangular patch, array, U-Slot ABSTRACTData rate and network capacity improvements offset the increase of user needs, hence it requires a wider bandwidth. The most current high-end technology, which can solve the problem is 5G. One of the frequency that becomes the candidate of 5G is 28 GHz. For 5G, it could apply one of the antenna types, micro strip antenna. However, micro strip antenna has a shortage of narrow bandwidth and small gain. Therefore, it requires a technique to increase the bandwidth and gain of the antenna. In this study, the form of micro strip of antenna design is a rectangular patch with the addition of U-Slot and arranged 1x2 to increase the bandwidth and antenna gain. The results of the simulation show that the antenna is working well at the range frequency of 27.5 GHz - 29.12 GHz, with a return loss limit of -15 dB with bandwidth of 1.62 GHz, the resulting gain value is 7.52 dB, the resulting radiation pattern is unidirectional and linearly polarized.Keywords: 5G, 28 GHz, microstrip, rectangular patch, array, U-Slot

Yagi-Uda Antenna for Navigational Aids Using HFSS

2017 ◽  
Vol 8 (3) ◽  
pp. 627
Author(s):  
Ramesh P. ◽  
V. Mathivanan
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Frequency ◽  
Return Loss ◽  
Impedance Matching ◽  
Radiation Patterns ◽  
Ultra High Frequency ◽  
Navigational Aids ◽  
The Stability ◽  
Uhf Band

<p>In this paper, the ultra high frequency of yagi-uda antenna for navigational has been designed to improve the usable bandwidth by improving the stability of the radiation patterns. The frequency band of ultra high frequency is 300-3000 MHZ. The main aim of this paper is to reduce the loss, improve the gain and also to enhance the efficiency of ultra high frequency yagi-uda antenna for utilizing the navigational aids. The proposed UHF band of Yagi-Uda antenna has been designed by using ANSYS HFSS tool for the application of navigational aids. The characteristics specifications of yagi-uda antenna such as Radiation pattern, S11 (return loss), impedance matching and gain are analyzed in this work.</p>

scholarly journals A Compact Single-Feed Circularly Polarized Microstrip Antenna with Symmetric and Wide-Beamwidth Radiation Pattern

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Xihong Ye ◽  
Mang He ◽  
Pingyuan Zhou ◽  
Houjun Sun
Keyword(s):  
Circular Polarization ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Compact Structure ◽  
Circularly Polarized ◽  
Wide Range ◽  
Half Power ◽  
Slot Aperture

A compact single-feed circularly polarized microstrip antenna is proposed to achieve symmetric radiation pattern over a wide range of observation angles. In order to reduce the radiation aperture and consequently broaden the circular polarization (CP) and the half power beamwidth (HPBW) of the antenna, a partially etched superstrate and a conducting cavity are employed in the design. Further, reasonable axial ratio (AR) and impedance bandwidths are realized within the compact structure by using a simple series crossed-slot aperture coupled feeding. As a consequence, the overall dimension of the fabricated prototype is 0.32λ0× 0.32λ0× 0.12λ0at the center operating frequency of 1.56 GHz, and a 3.0% overlapped bandwidth of 10 dB return loss (RL) and 3 dB AR is obtained. Within the bandwidth, symmetric CP radiation pattern over almost the entire upper hemisphere is observed and the HPBW is also increased from 60° to 106°.

Reconfigurable antennas with frequency, polarization, and pattern diversities for multi-radio wireless applications

2015 ◽  
Vol 9 (1) ◽  
pp. 121-132 ◽  
Author(s):  
Chilukuri Sulakshana ◽  
Lokam Anjaneyulu
Keyword(s):  
Wireless Communication ◽  
Radiation Pattern ◽  
Standing Wave ◽  
Return Loss ◽  
Reconfigurable Antennas ◽  
Reconfigurable Antenna ◽  
Patch Antennas ◽  
Band Frequency ◽  
Wireless Applications ◽  
Good Agreement

This paper presents different reconfigurable antennas with frequency, polarization, and pattern diversities. All the antennas have a very simple, novel, and compact structures, which are used for different wireless communication applications. These antennas employ switching for obtaining different reconfigurations. At first, an E-shaped antenna is designed for multi-band frequency reconfigurability. Second, circular and rectangular-shaped patch antennas are designed for achieving diversity in polarization. At last, a pattern reconfigurable antenna is designed with multiport excitation. These antenna performances are analyzed using various parameters such as return loss, radiation pattern, voltage standing wave ratio (VSWR), and gain. The prototypes of the antennas are fabricated and measured results along with simulated ones are presented. Both the results are in good agreement.

scholarly journals Design and Implementation of Planar Fourtear Microstrip Antenna for WLAN and WiMAX Applications

2016 ◽  
Vol 16 (1) ◽  
pp. 20
Author(s):  
Ken Paramayudha ◽  
Yuyu Wahyu ◽  
Aprilia Pustpita Sari ◽  
Heroe Wijanto
Keyword(s):  
Finite Element ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Design And Implementation ◽  
Working Frequency

In this paper, the microstrip planar fourtear antenna that operate at frequency range 2300 – 2500 MHz was investigated, Some applications suitable to operate in this frequency are WiMAX at 2.3 and 2.5 GHz and WLAN at 2.4 GHz. Simulations performed with the aid of Finite Element Emthod (FEM) based software which can calculte and comply the appropriate design to be able to operate at the desired working frequency. The analyzed parameters include : SWR, impedance, return loss, radiation patterns, gain, and polarization. From the measurement, bandwidth obtained is equal to 7.69% in the frequency range of 2318,250-2500 MHz in VSWR < 2. Radiation pattern measurement was unidirectional and the polarization was elliptical.

scholarly journals Investigations on feeding techniques of dielectric resonator antenna at 26 GHz

2020 ◽  
Vol 19 (2) ◽  
pp. 864
Author(s):  
Irfan Ali ◽  
Mohd Haizal Jamaluddin ◽  
Abinash Gaya
Keyword(s):  
Radiation Pattern ◽  
Dielectric Resonator ◽  
Return Loss ◽  
Radiation Efficiency ◽  
Efficiency Gain ◽  
Dielectric Resonator Antenna ◽  
Effect Of Feeding ◽  
Excitation Method ◽  
Slot Aperture ◽  
Feeding Techniques

<span>In this paper, Microstrip slot aperture and Microstrip line feeding techniques of dielectric resonator antenna are investigated and examined at 26 GHz for 5G applications. The dielectric resonator has a dielectric constant of 10 and etched on Rogers RT/Duroid 5880 substrate having a thickness of 0.254mm and relative permittivity of 2.2. The proposed structures are optimized and simulated using the commercial software CST Microwave studio. The effect of feeding techniques on the bandwidth, radiation efficiency, gain, VSWR and radiation pattern are also examined and analysed. The return loss, bandwidth, gain, radiation efficiency, VSWR and radiation pattern are presented and compared based on the excitation method employed for the studied DRA. The simulated results show that the microstrip slot aperture provides good performance and is suitable for 5G applications.</span>

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