scholarly journals A Novel Dual-Band Binary Branch Fractal Bionic Antenna for Mobile Terminals

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaoying Ran ◽  
Zhen Yu ◽  
Tangyao Xie ◽  
Yao Li ◽  
Xiuxia Wang ◽  
...  
Keyword(s):  
Mobile Applications ◽  
Fractal Structure ◽  
Dual Band ◽  
Fourth Generation ◽  
Resonant Coupling ◽  
Frequency Bands ◽  
Wireless Applications ◽  
Measurement Results ◽  
Bionic Structure ◽  
Good Agreement

A novel two-iteration binary tree fractal bionic structure antenna is proposed for the third generation (3G), fourth generation (4G), WLAN, and Bluetooth wireless applications in the paper, which is based on the principles of conventional microstrip monopole antenna and resonant coupling technique, combined with the advantages of fractal geometry. A new fractal structure was presented for antenna radiator, similar to the tree in nature. The proposed antenna adapted two iterations on a fractal structure radiator, which covers mobile applications in two broad frequency bands with a bandwidth of 44.2% (1.85–2.9 GHz) for TD-SCDMA, WCDMA, CDMA2000, LTE33-41, and Bluetooth frequency bands, and 11.5% (4.9–5.5 GHz) for WLAN frequency band. The proposed antenna was fabricated on a G10/FR4 substrate with a dielectric constant of 4.4 and a size of 50 × 40 mm2. The good agreement between the measurement results and the simulation results validate that the proposed design approach meet the requirements for various wireless applications.

scholarly journals A Novel Ancient Coin-Like Fractal Multiband Antenna for Wireless Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Zhen Yu ◽  
Jianguo Yu ◽  
Xiaoying Ran ◽  
Chenhua Zhu
Keyword(s):  
Satellite System ◽  
Structural Features ◽  
Microstrip Antennas ◽  
Fourth Generation ◽  
Navigation Satellite ◽  
Frequency Bands ◽  
Satellite Navigation System ◽  
Wireless Applications ◽  
Measurement Results ◽  
Global Navigation Satellite

This study proposes a novel square-circle structure fractal multibroadband planar antenna, similar to an ancient Chinese coin-like structure, for second generation (2G), third generation (3G), fourth generation (4G), WLAN, and navigation wireless applications. The device is based on the principles and structural features of conventional monopole antenna elements, combined with the advantages of microstrip antennas and fractal geometry. A fractal method was presented for circular nested square slotted structures, similar to an ancient Chinese copper coin. The proposed antenna adapted five iterations on a fractal structure radiator, which covers more than ten mobile applications in three broad frequency bands with a bandwidth of 70% (1.43–2.97 GHz) for DCS1800, TD-SCDMA, WCDMA, CDMA2000, LTE33-41, Bluetooth, GPS (Global Positioning System), BDS (BeiDou Navigation Satellite System), GLONSS (Global Navigation Satellite System), GALILEO (Galileo Satellite Navigation System), and WLAN frequency bands, 16.32% (3.32–3.91 GHz) for LTE42, LTE43, and WiMAX frequency bands, and 10.92% (4.85–5.41 GHz) for WLAN frequency band. The proposed antenna was fabricated on a 1.6 mm thick G10/FR4 substrate with a dielectric constant of 4.4 and a size of 88.5 × 60 mm2. The measurement results reveal that the omnidirectional radiation patterns achieve a gain of 1.16–3.75 dBi and an efficiency of 40–72%. The good agreement between the measurement results and simulation validates the proposed design approach and satisfies the requirements for various wireless applications.

Dual Band Paper Substrate CPW Antenna for Wireless Applications

2019 ◽  
Vol 8 (9S3) ◽  
pp. 605-608
Keyword(s):  
Reflection Coefficient ◽  
Mobile Communication ◽  
Coplanar Waveguide ◽  
Dual Band ◽  
Antenna Feed ◽  
Paper Substrate ◽  
Frequency Bands ◽  
Wireless Applications

In this paper, a 15* 80 sized antenna is designed over a paper substrate to test its flexible properties. The proposed antenna feed by a grounded coplanar waveguide(GCPW) is stimulated and the measured results show the operating Dual Band of the antenna cover(3.34-3.62 GHz) and (5.92-6.24 GHz) with the reflection coefficient |S11|< -15dB.These frequency bands operate over SHF bands and hence supports Fixed Mobile Communication and WLAN applications.

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

2017 ◽  
Vol 9 (7) ◽  
pp. 1467-1471 ◽  
Author(s):  
Leila Noori ◽  
Abbas Rezaei
Keyword(s):  
General Structure ◽  
Basic Information ◽  
Dual Frequency ◽  
Wireless Applications ◽  
Resonance Frequencies ◽  
Measurement Results ◽  
Coupled Lines ◽  
Lc Circuit ◽  
Insertion Losses ◽  
Good Agreement

In this paper, a microstrip diplexer composed of two similar resonators is designed. The proposed resonator is consisting of four microstrip cells, which are connected to a coupled lines structure. In order to select a suitable geometric structure, first, all cells are assumed as undefined structures where there is a lack of basic information about their geometry and dimensions. Then, an equivalent LC circuit of the coupled lines is introduced and analyzed to estimate the general structure of the resonator respect to a requested resonance frequency. The proposed diplexer is designed to operate at 2.36 and 4 GHz for wireless applications. The insertion losses (S21 and S31) are decreased significantly at the resonance frequencies, so that they are 0.2 and 0.4 dB at 2.36 and 4 GHz, respectively. The designed diplexer is fabricated and measured and the measurement results are in a good agreement with the simulations.

Single-feed circularly polarized stacked patch antenna with small-frequency ratio for dual-band wireless applications

2015 ◽  
Vol 8 (8) ◽  
pp. 1207-1213 ◽  
Author(s):  
Sachin Kumar ◽  
Binod K. Kanaujia ◽  
Mukesh K. Khandelwal ◽  
A.K. Gautam
Keyword(s):  
Patch Antenna ◽  
Frequency Ratio ◽  
Axial Ratio ◽  
Dual Band ◽  
Radiation Characteristics ◽  
Small Frequency ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Good Agreement

A single-feed dual-band circularly polarized stacked microstrip patch antenna with a small-frequency ratio is presented. Two pair of orthogonal slits is cut on the lower circular patch for achieving circular polarization and truncated corner square patch is used as the upper parasitic element. The frequency ratio of the dual-band is 1.03. The 3 dB axial ratio bandwidth is 1.3% for the upper band and 1.1% for the lower band. Proposed structure is fabricated on the FR-4 epoxy substrate and fed by SMA connector. The measured results are in good agreement with the theoretical and simulated results. The antenna shows stable radiation characteristics in both bands of operation.

scholarly journals Dual Band Gap Coupled Antenna Design with DGS for Wireless Communications

2014 ◽  
Vol 2 (3) ◽  
pp. 51 ◽  
Author(s):  
A. Kandwal ◽  
R. Sharma ◽  
S. K. Khah
Keyword(s):  
Side Lobe ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Side Lobe Level ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Wireless Applications ◽  
X Band ◽  
Ring Antenna ◽  
Good Agreement

A novel gap coupled dual band multiple ring antenna with a defected ground structure (DGS) has been successfully implemented. A different technique is used in this communication where both gap coupling and defected ground are applied to obtain better results for wireless applications. The designed antenna operates in two different frequency bands. The antenna shows a wideband in C-band and also resonates in the X-band. The main parameters like return loss, impedance bandwidth, radiation pattern and gain are presented and discussed. The gain is increased and the side lobe level is considerably reduced to a good extent. Designed antenna is tested and the results show that the simulation and experimental results are in good agreement with each other.

scholarly journals Performance Analysis of a Defected Ground-Structured Antenna Loaded with Stub-Slot for 5G Communication

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2634 ◽  
Author(s):  
Md Mushfiqur Rahman ◽  
Md Shabiul Islam ◽  
Hin Yong Wong ◽  
Touhidul Alam ◽  
Mohammad Tariqul Islam
Keyword(s):  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Electronic Band ◽  
Band Frequency ◽  
Antenna Structure ◽  
Wireless Applications ◽  
High Impedance ◽  
Electronic Band Gap ◽  
Good Agreement

In this paper, a defected ground-structured antenna with a stub-slot configuration is proposed for future 5G wireless applications. A simple stub-slot configuration is used in the patch antenna to get the dual band frequency response in the 5G mid-band and the upper unlicensed frequency region. Further, a 2-D double period Electronic band gap (EBG) structure has been implemented as a defect in the metallic ground plane to get a wider impedance bandwidth. The size of the slots and their positions are optimized to get a considerably high impedance bandwidth of 12.49% and 4.49% at a passband frequency of 3.532 GHz and 6.835 GHz, respectively. The simulated and measured realized gain and reflection coefficients are in good agreement for both operating bandwidths. The overall antenna structure size is 33.5 mm × 33.5 mm. The antenna is fabricated and compared with experimental results. The proposed antenna shows a stable radiation pattern and high realized gain with wide impedance bandwidth using the EBG structure, which are necessary for the requirements of IoT applications offered by 5G technology.

scholarly journals A Dual-Band Printed Slot Antenna for WiMAX and Metrological Wireless Applications

2018 ◽  
Vol 7 (3) ◽  
pp. 75-81
Author(s):  
Y. S. Mezaal ◽  
S. F. Abdulkareem ◽  
J. K. Ali
Keyword(s):  
Microstrip Antenna ◽  
Dual Band ◽  
Slot Antenna ◽  
Wireless Devices ◽  
Wireless Applications ◽  
Compact Size ◽  
Satellite Applications ◽  
Order Structures ◽  
Measured Input ◽  
Good Agreement

New microstrip antenna initiated from the portions of  1st order structures of Sierpinski square geometry is  modeled  in this paper as quasi-fractal device using an FR4 substrate of 4.4 dielectric constant, 1.6 mm thickness and 0.02 loss tangent. The intended microstrip antenna is designed for band frequencies  of 3.5 and 7.8 GHz for WiMAX and metrological satellite applications with a bandwidth of 0.66 and 0.78 GHz for each band respectively. The designed antenna has considerable compact size  that is smaller than many reported fractal and non-fractal antenna structures in the literature. Also, it has interesting return loss and radiation results that can be employed in diverse wireless devices. Measured input reflection coefficient, radiation patterns and gain results have been found in good agreement with those predicted by simulations.

A compact double-band planar printed slot antenna for sub-6 GHz 5G wireless applications

2020 ◽  
pp. 1-9
Author(s):  
Insha Ishteyaq ◽  
Issmat Shah Masoodi ◽  
Khalid Muzaffar
Keyword(s):  
Frequency Band ◽  
Dual Band ◽  
Slot Antenna ◽  
Rectangular Slot ◽  
Wireless Applications ◽  
Feed Line ◽  
International Telecommunications ◽  
Compact Size ◽  
Peak Gain ◽  
Good Agreement

Abstract A planar rectangular slot antenna with dual-band operation and realized higher peak gain is proposed, designed, and fabricated for sub-6 GHz 5G applications. The antenna possesses a rectangular radiating slot with the inverted stub on its upper edge excited simultaneously by a micro-strip feed line having a double folded T-shaped structure. The fabricated design is of compact size with the radiating portion of 0.3 λ0 × 0.17 λ0 (λ0 represents free-space wavelength) and profile of 0.009 λ0. The measured results show the operating frequency bands of 3.29–3.63 GHz and 4.3–5.2 GHz, with a peak gain of around 7.17 dBi. The higher frequency band is generated by the feed patch and the slot whereas lower resonant frequency band is generated by the stub loaded on the slot. The measured results are in a good agreement with the simulated results. The proposed design is suitable for the International Telecommunications Union sub 6 GHz applications.

Miniature Ceramic Antennas for Wireless Applications

2010 ◽  
Vol 67 ◽  
pp. 1-9
Author(s):  
Zlatoljub D. Milosavljevic
Keyword(s):  
Mobile Applications ◽  
Dual Band ◽  
High Permittivity ◽  
Ceramic Substrates ◽  
Wireless Applications ◽  
Radiation Properties ◽  
Dual Band Antennas

This paper explores the use of high-permittivity ceramic substrates in producing novel miniature ceramic chip antenna designs. Single- and dual-band antennas for non-cellular applications have been presented. Another aspect presented in the paper is creating a compact switchable ceramic chip antenna for cellular application. The measured results of all antennas are given. It is shown that presented antenna structures have very good impedance and radiation properties, features that are of interest in many mobile applications.

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