scholarly journals Design of Frequency- and Pattern-Reconfigurable Wideband Slot Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Liping Han ◽  
Caixia Wang ◽  
Wenmei Zhang ◽  
Runbo Ma ◽  
Qingsheng Zeng
Keyword(s):  
Microstrip Line ◽  
Beam Steering ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Pin Diodes ◽  
Frequency Bands ◽  
Feed Line

A wideband slot antenna with frequency- and pattern-reconfigurable characteristics for TD-LTE (3.4–3.8 GHz) and C-band (3.7–4.2 GHz) applications is proposed. The antenna consists of two symmetric slots that are fed by a fork-shaped microstrip line. Two PIN diodes are loaded in the slots to produce two different frequency bands. Meanwhile, two additional PIN diodes are inserted in the feed line to achieve the pattern reconfigurability. The wideband operation is realized by using the symmetric slots and fork-shaped feed line. Simulated and measured results show that the antenna provides 25° and 20° beam-steering in 3.4–3.8 and 3.7–4.2 GHz bands, respectively. Also, an impedance bandwidth of at least 12.8% is obtained in the operating bands.

A novel single-feed reconfigurable antenna for polarization and frequency diversity

2016 ◽  
Vol 9 (5) ◽  
pp. 1155-1161 ◽  
Author(s):  
Ailar Sedghara ◽  
Zahra Atlasbaf
Keyword(s):  
Circular Polarization ◽  
Simple Structure ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Frequency Diversity ◽  
Resonant Frequencies ◽  
Frequency Bands ◽  
Left Hand ◽  
Microstrip Feed

A novel dual-band single-feed reconfigurable annular-ring slot antenna with polarization diversity is proposed. This antenna has the ability to switch frequency bands and polarization at the same time whereas applying a simple structure. It consists of two concentric circular slots and two tuning stubs on one side of the substrate and a 50 Ω microstrip feed line and two stubs on the other side. The proposed antenna can be switched between two resonant frequencies, 2.4 GHz (WLAN) and 3.5 GHz (Wimax). Furthermore, it can be switched between linear polarization (LP), left-hand circular polarization (LHCP), and right-hand circular polarization (RHCP) at the first frequency band, LHCP and RHCP at the second band. All these capabilities are achieved by applying only five PIN diodes on both sides of the substrate. Simulation and experimental results indicate that the proposed antenna demonstrates a good impedance bandwidth at the two frequency bands and satisfactory radiation pattern in five different states.

Frequency Reconfigurable Hybrid Slot Antenna Using PIN Diodes

Frequenz ◽  
2015 ◽  
Vol 69 (11-12) ◽  
Author(s):  
Xiaolin Yang ◽  
Lili Sheng ◽  
Jiancheng Lin ◽  
Gang Chen
Keyword(s):  
Return Loss ◽  
Coplanar Waveguide ◽  
Wireless Systems ◽  
Slot Antenna ◽  
Loss Peak ◽  
Radiation Patterns ◽  
Pin Diodes ◽  
Frequency Bands ◽  
Peak Gain ◽  
Bias Network

AbstractThis paper introduces a frequency reconfigurable hybrid slot antenna fed by coplanar waveguide (CPW) without complex bias network and DC blocking capacitor chips. In order to add reconfigurablility to the antenna, the PIN diodes are equipped in the slots. The antenna is capable of frequency switching at six different frequency bands between 1.7 GHz to 2.5 GHz, which can be used in multiradio wireless systems, such as DCS-1800, PCS1900, UMTS, Wibro and Bluetooth bands. The simulated and measured return loss, peak gain, together with the radiation patterns are presented and compared. Especially, the radiation patterns are stable at different frequency.

scholarly journals Inset fed Triple Band U-Slot Antenna for GSM900/GSM1900/WLAN Applications

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1513-1517
Keyword(s):  
Mobile Communication ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Global System ◽  
Frequency Bands ◽  
Triple Band

To cover Global System for Mobile Communication(GSM) and WLAN frequency bands, three distinctive Inset fed antennas like rectangular microstrip, dualband dual slot and antennas are designed. Inset fed micostrip antenna is used for GSM1900 with an impedance bandwidth from 1.90GHz to 1.96GHz. Inset fed dual band dual slot antenna is used for GSM1900 and WLAN with impedance bandwidth is considered first band from 1.90GHz to 1.95GHz and second band from 2.38GHz to 2.42GHz. The proposed Inset fed triple band antenna is used for GSM900, GSM1900 and WLAN with appropriate position of slot, is to operate in frequency ranges of first band is from 920MHz to 940MHz, second band is from 1.91GHz to 1.94GHz and third band is from 2.39GHz to 2.43GHz. A correlation among various feed widths, feed lengths and slot widths are exhibited in this paper.

A Compact Wideband Dual-Circular Polarization CPW-Fed Slot Antenna

2020 ◽  
Vol 35 (10) ◽  
pp. 1200-1206
Author(s):  
Zhao Jiang ◽  
Shi Huang ◽  
Zhi Wang ◽  
Xiao Zhao ◽  
Ting Wan
Keyword(s):  
Circular Polarization ◽  
Standing Wave ◽  
Simple Structure ◽  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Voltage Standing Wave Ratio ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Feed Line

A compact wideband coplanar waveguide (CPW) excited slot antenna with dual-circular polarization (DCP) is presented and fabricated in this paper. Two inverted-L-shaped patches are implanted in a square slot to achieve wideband DCP characteristic. The feed line is terminated on an inverted-L-shaped patch. Moreover, two rectangular slots are added on the corners of the antenna to improve the bandwidth of axial ratio (AR) and the voltage standing wave ratio (VSWR). The simulated results show that the designed antenna can generate a good impedance bandwidth of 70.4% and a 3-dB AR bandwidth of 48.6%, respectively. This antenna possesses the qualities of small size, simple structure, and good dual-circular polarization.

A compact rhombus-shaped slot antenna fed by microstrip-line for UWB applications

2015 ◽  
Vol 9 (2) ◽  
pp. 403-409 ◽  
Author(s):  
Richa Chandel ◽  
Anil Kumar Gautam ◽  
Binod Kumar Kanaujia
Keyword(s):  
Microstrip Line ◽  
Impedance Matching ◽  
Wide Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Performance ◽  
Compact Size ◽  
Feeding Structure ◽  
Uwb Applications ◽  
Novel Design

In this paper, a novel design and experimental study of microstrip-line-fed rhombus-shaped slot antenna is presented. The proposed antenna shows an ultra-wide band (UWB) operation with good impedance matching by choosing appropriate rhombus-shaped slot and feeding structure. The proposed antenna has a simple structure and compact size as compared with many reported antennas. The measured results validate the design and the impedance bandwidth can operate from 2.78 to 12.92 GHz (10.14 GHz), which evidently covers entire UWB (3.1–10.6 GHz). Furthermore, the key parameters of the antenna are also discussed to study their persuade on the antenna performance.

scholarly journals Broadband Koch Fractal Boundary Printed Slot Antenna for ISM Band Applications

2018 ◽  
Vol 7 (5) ◽  
pp. 31-36 ◽  
Author(s):  
V. V. Reddy
Keyword(s):  
Experimental Data ◽  
Close Agreement ◽  
Microstrip Line ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Fractal Boundary ◽  
Ism Band ◽  
Koch Fractal ◽  
Iteration Order

A new broadband radiating slot antenna with fractal shape is modeled, fabricated and experimentally studied. The presented slot antenna is examined for first three iterations. Optimization of iteration factor (IF) and iteration angle (IA) have been done for each iteration order (IO) to enhance impedance bandwidth significantly. All the antennas are fed with a simple microstrip line. Bandwidth achieved with Antenna 1 (IO=1, IF=0.35 and IA=600) is 1550 MHz which is five times more than that of the square slot antenna. The performance of the proposed fractal slots is also compared with the rotated slot antenna.  The experimental data validates the reported analysis with a close agreement.

scholarly journals Printed Wide-Slot Antenna Design with Bandwidth and Gain Enhancement on Low-Cost Substrate

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
M. Samsuzzaman ◽  
M. T. Islam ◽  
J. S. Mandeep ◽  
N. Misran
Keyword(s):  
Microstrip Line ◽  
Low Cost ◽  
Ground Plane ◽  
Simulation Software ◽  
Antenna Design ◽  
Slot Antenna ◽  
Design Parameters ◽  
Impedance Bandwidth ◽  
Strip Line ◽  
Gain Enhancement

This paper presents a printed wide-slot antenna design and prototyping on available low-cost polymer resin composite material fed by a microstrip line with a rotated square slot for bandwidth enhancement and defected ground structure for gain enhancement. An I-shaped microstrip line is used to excite the square slot. The rotated square slot is embedded in the middle of the ground plane, and its diagonal points are implanted in the middle of the strip line and ground plane. To increase the gain, four L-shaped slots are etched in the ground plane. The measured results show that the proposed structure retains a wide impedance bandwidth of 88.07%, which is 20% better than the reference antenna. The average gain is also increased, which is about 4.17 dBi with a stable radiation pattern in the entire operating band. Moreover, radiation efficiency, input impedance, current distribution, axial ratio, and parametric studies of S11 for different design parameters are also investigated using the finite element method-based simulation software HFSS.

A simple and compact broadband circularly polarized circular slot antenna for WLAN/WiMAX/DBS applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shilpee Patil ◽  
Anil Kumar Singh ◽  
Vijay Kumar Pandey ◽  
Binod Kumar Kanaujia ◽  
Anil Kumar Pandey
Keyword(s):  
Ground Plane ◽  
Axial Ratio ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Validation Process ◽  
Horizontal Strip ◽  
Circularly Polarized ◽  
Feed Line ◽  
Circular Segment ◽  
Asymmetric Perturbation

Abstract A simple and compact circularly polarized broadband circular slot antenna is proposed for WLAN/WiMAX/DBS applications. The main objective of this work is to design a microstrip line fed broadband circularly polarized antenna that is achieved by introducing an asymmetric perturbation over the circular slot onto the ground plane. A broad axial ratio bandwidth is achieved by using a small circular segment cut into the circular slotted ground and by adding a short stub on the feedline. To achieve a broad impedance bandwidth, a horizontal strip onto the slotted ground is placed just above the feed line on the opposite side. The proposed antenna is fabricated with an overall dimension of 20 × 20 × 1.6 mm3 (0.34λ o × 0.34λ o × 0.03λ o, where λ o represents the free-space wavelength at the center operating frequency). It is found that the impedance bandwidth of 75.82% ranges from 3.21 to 7.13 GHz and the 3 dB axial ratio (AR) bandwidth reaches 54.27% from 3.8 to 6.6 GHz. Throughout this paper, the improvement and validation process of the proposed antenna outcomes to accomplish desired characteristics are discussed.

A 260-GHz on-chip cavity-backed slot antenna

2018 ◽  
Vol 11 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jun Xiao ◽  
Zihang Qi ◽  
Xiuping Li ◽  
Weiwei Feng ◽  
Hua Zhu
Keyword(s):  
Metal Layer ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Strip Line ◽  
Total Size ◽  
Bandwidth Enhancement ◽  
Feed Line ◽  
Bicmos Technology ◽  
Sige Bicmos ◽  
On Chip

AbstractThis paper presents a cavity-backed dual-slot antenna in 0.13-μm SiGe BiCMOS technology. The dual-slot structure is excited by a cross-shaped strip line and a cavity which is formed by the topmost metal layer connected to the bottom metal layer through vias in between. By adopting dual-slot and cross-shaped feed line, the bandwidth is significantly enhanced by 196% compared with the single-slot antenna with straight feed line. The reason for bandwidth enhancement has been analyzed. The proposed antenna shows a measured impedance bandwidth of 15.2 GHz from 248.2 to 263.4 GHz for |S11| < −10 dB. The simulated and measured peak gains of the cavity-backed dual-slot antenna are −1.3 and −2.1 dBi, respectively. The simulated radiation efficiency is 31.1%. The total size of the antenna is 0.46 mm × 0.48 mm.

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