A new electrically small antenna for on-demand 3.6/5.8 GHz wireless applications

2021 ◽  
pp. 1-11
Author(s):  
Mohammad Ahmad Salamin ◽  
Asmaa Zugari
Keyword(s):  
Dual Band ◽  
Mode Analysis ◽  
Operating Frequency ◽  
Front Face ◽  
Clear Understanding ◽  
Characteristic Mode ◽  
Wireless Applications ◽  
Electrically Small Antenna ◽  
On Demand ◽  
Small Antenna

Abstract This article presents a highly miniaturized dual-band electrically small antenna (ESA) for on-demand 3.6 and 5.8 GHz wireless applications. A partial rectangle-shaped structure is printed on the back face of the dielectric material, forming the antenna's ground (GND) plane. The radiating structure of the antenna consists of a C-shaped structure and a U-shaped ring connected to it, which is printed on the dielectric material's front face. The overall dimensions of the designed antenna are 0.160λo × 0.160λo × 0.02λo at the lowest operating frequency. The proposed antenna has a ka value of 0.56 at the lowest operating frequency, which is 3.59 GHz. Thus, the proposed antenna is considered as electrically small. The characteristic mode analysis is adopted to provide a clear understanding of the antenna's resonance behavior. The antenna has been fabricated and the simulation results were validated through measurements. Good agreement between simulated and measured results was obtained. Dual-band operation at 3.62 and 5.75 GHz was achieved, according to the measured reflection coefficient. The proposed antenna offers an adequate performance in terms of gain and efficiency, based on simulation and measurement results. Because of these characteristics, the antenna is well-suited to new wireless applications.

scholarly journals Design and Realization of a Frequency Reconfigurable Antenna with Wide, Dual, and Single-Band Operations for Compact Sized Wireless Applications

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1321
Author(s):  
Wahaj Abbas Awan ◽  
Syeda Iffat Naqvi ◽  
Wael Abd Ellatif Ali ◽  
Niamat Hussain ◽  
Amjad Iqbal ◽  
...  
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Single Band ◽  
Dual Band ◽  
Operating Frequency ◽  
Reconfigurable Antenna ◽  
Area Network ◽  
Wireless Applications ◽  
Operating Modes ◽  
Compact Size

This paper presents a compact and simple reconfigurable antenna with wide-band, dual-band, and single-band operating modes. Initially, a co-planar waveguide-fed triangular monopole antenna is obtained with a wide operational frequency band ranging from 4.0 GHz to 7.8 GHz. Then, two additional stubs are connected to the triangular monopole through two p-i-n diodes. By electrically switching these p-i-n diodes ON and OFF, different operating frequency bands can be attained. When turning ON only one diode, the antenna offers dual-band operations of 3.3–4.2 GHz and 5.8–7.2 GHz. Meanwhile, the antenna with single-band operation from 3.3 GHz to 4.2 GHz can be realized when both of the p-i-n diodes are switched to ON states. The proposed compact size antenna with dimensions of 0.27λ0 × 0.16λ0 × 0.017λ0 at the lower operating frequency (3.3 GHz) can be used for several wireless applications such as worldwide interoperability for microwave access (WiMAX), wireless access in the vehicular environment (WAVE), and wireless local area network (WLAN). A comparative analysis with state-of-the-art works exhibits that the presented design possesses advantages of compact size and multiple operating modes.

scholarly journals A High-Efficiency Compact Planar Antenna for ISM Wireless Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Tao Zhou ◽  
Yazi Cao ◽  
Zhiqun Cheng ◽  
Martine Le Berre ◽  
Francis Calmon
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Impedance Matching ◽  
Wireless Systems ◽  
Planar Antenna ◽  
Wireless Applications ◽  
Electrically Small Antenna ◽  
Lumped Elements ◽  
Small Antenna ◽  
Compact Planar

A novel high-efficiency compact planar antenna at 433 MHz with minimized size and low-cost and easy to integrate into the ISM wireless applications is designed, fabricated, and measured. Capacitive strips that are formed by cutting inter-digital slots and the meander lines on both sides are introduced to greatly reduce the antenna size yet maintain the high efficiency. The proposed antenna has a simple planar structure and occupies a small area (i.e., 45 × 30 mm2). This novel electrically small antenna can be operated well without any lumped elements for impedance matching. Details of the antenna design and experimental results are presented and discussed.

scholarly journals Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes

2019 ◽  
Vol 70 (3) ◽  
pp. 187-197
Author(s):  
Ehab K. I. Hamad ◽  
Ahmed Abdelaziz
Keyword(s):  
Wireless Communication ◽  
Patch Antenna ◽  
Split Ring Resonator ◽  
Microstrip Antennas ◽  
Unit Cell ◽  
Dual Band ◽  
Mode Analysis ◽  
Electromagnetic Properties ◽  
Characteristic Mode ◽  
Antenna Structure

Abstract Metamaterials (MTMs) have received considerable attention due to their novel electromagnetic properties. Their applications include enhancing gain and bandwidth in microstrip antennas. In this article, a dual band microstrip antenna design based on characteristic mode analysis (CMA) using MTM superstrate is proposed for 5G wireless communication. The CMA is used for the modelling, analysis and optimization of the proposed antenna to examine the underlying modal behaviour of the MTM unit cell and to guide mode excitation. The antenna structure consists of a microstrip feed line connected to a rectangular patch. Then triangular split ring resonator unit cell is inserted on the ground of a traditional patch antenna that resonates at 15 GHz to produce additional resonance at 10 GHz. A planar array of 2 × 3 triangle MTM unit cells is used as superstrate to improve the gain and bandwidth at both resonances simultaneously. The optimal distance between MTM superstrate and the antenna patch is determined using the Fabry-Perot cavity theory to maximize power directivity and efficiency of the proposed antenna. The CST microwave studio software is used to model and optimize the proposed antenna. A prototype of the designed antenna that was fabricated showed good agreement between measurement and simulation results.

scholarly journals Near-Field HF-RFID and CMA-Based Circularly Polarized Far-Field UHF-RFID Integrated Tag Antenna

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Arnon Sakonkanapong ◽  
Chuwong Phongcharoenpanich
Keyword(s):  
Near Field ◽  
Axial Ratio ◽  
Dual Band ◽  
Mode Analysis ◽  
Impedance Bandwidth ◽  
Far Field ◽  
Uhf Rfid ◽  
Characteristic Mode ◽  
Rfid Tag ◽  
Circularly Polarized

This research proposes an integrated high-frequency (HF) and ultrahigh-frequency (UHF) passive radio frequency identification (RFID) tag antenna for near-field (13.56 MHz) and far-field (920–925 MHz) communication. This tag antenna is advantageous for the applications with lossy material in the near-field communication and mitigates polarization loss in the far-field communications. The HF-RFID tag antenna is of square spiral structure, and the circularly polarized UHF-RFID structure consists of a square loop radiator with cascading loop feeding and shorted stub. The structure of HF-RFID tag antenna situated inside the circularly polarized UHF-RFID tag can avoid the significant effect of the near-field magnetic coupling from the square loop. The UHF-RFID tag antenna is realized by using characteristic mode analysis for wideband circular polarization. The HF-RFID structure is conjugate-matched with NXP NT3H2111 chip, and the UHF-RFID structure is conjugate-matched with NXP G2X chip. Simulations were carried out, and an antenna prototype was fabricated. The experimental results reveal that the radiation pattern of UHF-RFID tag antenna is bidirectional with a gain of 0.31 dBic. The impedance bandwidth covers the frequency range of 903–944 MHz, and the axial ratio in boresight direction at 922.5 MHz is 1.67 dB, with the axial ratio bandwidth over 863–938 MHz. The maximum near-field and far-field reading ranges are 4.9 cm and 8.7 m. The proposed integrated dual-band passive tag antenna is operationally ideal for HF-RFID and UHF-RFID applications.

Sign in / Sign up

Export Citation Format

Share Document