scholarly journals Design of a Compact CPW-Fed Monopole Antenna With Asymmetrical Hexagonal Slot Loaded Ground Structure for C/X/Ku Band Applications

2020 ◽  
Vol 16 (1) ◽  
pp. 15-22
Author(s):  
Ajay Kumar Dwivedi ◽  
Brijesh Mishra ◽  
Vivek Singh ◽  
Pramod Narayan Tripathi ◽  
Ashutosh Kumar Singh
Keyword(s):  
High Frequency ◽  
Ground Plane ◽  
Directional Pattern ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
High Frequency Structure Simulator ◽  
Performance Matrix ◽  
Novel Design ◽  
Ku Band

AbstractA novel design of ultra-wideband CPW-fed compact monopole patch antenna is presented in the article. The size of the antenna is 22 × 18 × 1.6 mm and it operates well over an ultra-wideband frequency range 4.86–13.66 GHz (simulated) and 4.93–13.54 GHz (measured) covering C, X and partial Ku band applications. The proposed design consists of a defected ground plane and U-shape radiating patch along with two square shape parasitic patches in order to achieve the ultra-wideband (UWB) operations. The performance matrix is validated through measured results that indicate the wide impedance bandwidth (93.2 %) with maximum gain of 4 dBi with nearly 95 % of maximum radiation efficiency; moreover, the 3D gain pattern manifests approximately omni-directional pattern of the proposed design. The prototype has been modelled using HFSS (High Frequency Structure Simulator-18) by ANSYS, fabricated and tested using vector network analyser E5071C.

scholarly journals Band notched self complementaryultra wideband antenna for wireless applications

2018 ◽  
Vol 7 (2.8) ◽  
pp. 529 ◽  
Author(s):  
Ch Ramakrishna ◽  
G A.E.Satish Kumar ◽  
P Chandra Sekhar Reddy
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Wide Band ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Relative Dielectric Permittivity ◽  
Frequency Range ◽  
Ground Structure ◽  
Wireless Applications ◽  
Patch Edge

This paper presents a band notched WLAN self complementaryultra wide band antenna for wireless applications. The proposed antenna encounters a return loss (RL) less than -10dB for entire ultra wideband frequency range except band notched frequency. This paper proposes a hexagon shape patch, edge feeding, self complementary technique and defective ground structure. The antenna has an overall dimensionof 28.3mm × 40mm × 2mm, builton  substrate FR4 with a relative dielectric permittivity 4.4. And framework is simulated finite element method with help of high frequency structured simulator HFSSv17.2.the proposed antenna achieves a impedance bandwidth of 8.6GHz,  band rejected WLAN frequency range 5.6-6.5 GHz with  vswr is less than 2.

scholarly journals 8-Port Semi-Circular Arc MIMO Antenna with an Inverted L-Strip Loaded Connected Ground for UWB Applications

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1476
Author(s):  
Tathababu Addepalli ◽  
Arpan Desai ◽  
Issa Elfergani ◽  
N. Anveshkumar ◽  
Jayshri Kulkarni ◽  
...  
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Directional Pattern ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Circular Arc ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Uwb Applications

Multiple-input multiple-output (MIMO) antennas with four and eight elements having connected grounds are designed for ultra-wideband applications. Careful optimization of the lines connecting the grounds leads to reduced mutual coupling amongst the radiating patches. The proposed antenna has a modified substrate geometry and comprises a circular arc-shaped conductive element on the top with the modified ground plane geometry. Polarization diversity and isolation are achieved by replicating the elements orthogonally forming a plus shape antenna structure. The modified ground plane consists of an inverted L strip and semi ellipse slot over the partial ground that helps the antenna in achieving effective wide bandwidth spanning from (117.91%) 2.84–11 GHz. Both 4/8-port antenna achieves a size of 0.61 λ × 0.61 λ mm2 (lowest frequency) where 4-port antenna is printed on FR4 substrate. The 4-port UWB MIMO antenna attains wide impedance bandwidth, Omni-directional pattern, isolation >15 dB, ECC < 0.015, and average gain >4.5 dB making the MIMO antenna suitable for portable UWB applications. Four element antenna structure is further extended to 8-element configuration with the connected ground where the decent value of IBW, isolation, and ECC is achieved.

Annular ring microstrip patch antenna with finite ground plane for ultra-wideband applications

2014 ◽  
Vol 7 (2) ◽  
pp. 179-184 ◽  
Author(s):  
Sanyog Rawat ◽  
Kamalesh Kumar Sharma
Keyword(s):  
Microstrip Antenna ◽  
Simple Structure ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
Resonant Frequencies ◽  
Annular Ring ◽  
Low Profile ◽  
Key Factor

A design of annular ring microstrip antenna with finite ground structure is proposed in this paper. The proposed geometry offers impedance bandwidth of 2.362 GHz and has stable radiation patterns for all resonant frequencies in the operational band. It is also found that shape and dimension of the finite ground plane is a key factor in improving the bandwidth of the proposed geometry. The geometry is low profile and has simple structure, therefore can be used for lower band of ultra-wideband applications.

A compact ultra wideband antenna with triple band-notch characteristics

2015 ◽  
Vol 8 (7) ◽  
pp. 1069-1075 ◽  
Author(s):  
Meenakshi Devi ◽  
Anil Kumar Gautam ◽  
Binod Kumar Kanaujia
Keyword(s):  
Parametric Study ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Wide Bandwidth ◽  
Wideband Antenna ◽  
Antenna Performance ◽  
Simulation Results ◽  
Novel Design ◽  
Triple Band

A novel design of a compact ultra wideband antenna with triple band-notched characteristics is proposed. Much wider impedance bandwidth (from 2.63 to 13.02 GHz) is obtained by using a star like-shaped radiator and a defected rectangular ground plane and band-notched functions are obtained by attaching L- and I-shaped structure on the ground and a capacitive-loaded loop (CLL) resonator on the patch. The triple band-notch rejection at WiMAX, WLAN, and ITU bands are obtained by attaching I-shape strip, CLL resonator, and flip L-shape, respectively. The parametric study is carried out to study the influence of varying dimensions on the antenna performance. To validate simulation results of the design a prototype is fabricated on the commercially available FR4 material. The measured results reveal that the presented triple band-notch antenna offers a very wide bandwidth of 10.41 GHz (2.63–13.04 GHz) with triple band-notched characteristics at WiMAX (2.94–3.7 GHz), WLAN (5.1–5.9 GHz), and ITU (7.4–8.7 GHz).

Microstrip-line-fed inverted L-shaped circularly polarized antenna for C-band applications

2021 ◽  
pp. 1-9
Author(s):  
Karunesh Srivastava ◽  
Brijesh Mishra ◽  
Rajeev Singh
Keyword(s):  
Circular Polarization ◽  
High Frequency ◽  
Microstrip Line ◽  
Ground Plane ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
High Frequency Structure Simulator ◽  
Frequency Structure ◽  
Peak Gain

Abstract A circularly polarized stub-matched inverted L-shaped antenna for C-band applications is presented in this communication. Antenna parameters of inverted L-shape on the radiating patch and slits, notch, square strips and stub on the ground plane and the effect of these are analyzed. The proposed optimized antenna (A5: 0.54λ0 × 0.54λ0 × 0.02λ0 mm3) is selected among antennas (A1 – A5) with 5.1 GHz design frequency after simulation through high-frequency structure simulator (HFSS). Circular polarization is obtained by introducing stub/perturbation on the ground plane. By introducing stub, the highest measured (S11 < − 10 dB) impedance bandwidth of 50.9% (3.48 – 5.86 GHz) is observed amongst the reported and compared bandwidths. Peak gain of 5.32 dBi and 3 dB axial ratio bandwidth of 16.2% (4.71 – 5.54 GHz) is reported in the present work. An antenna is useful in the entire downlink frequency (3.7 – 4.2 GHz) of the C band.

scholarly journals Design of CPW-Fed Antenna with Defected Substrate for Wideband Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Amar Sharma ◽  
Puneet Khanna ◽  
Kshitij Shinghal ◽  
Arun Kumar
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Group Delay ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Radiation Characteristics ◽  
High Frequency Structure Simulator ◽  
X Band ◽  
Good Agreement

A CPW-fed defected substrate microstrip antenna is proposed. The proposed antenna shows wideband applications by choosing suitable defected crown shaped substrate. Defected substrate also reduces the size of an antenna. The radiating patch of proposed antenna is taken in the form of extended U-shape. The space around the radiator is utilized by extending the ground plane on both sides of radiator. Simulation of proposed antenna is done on Ansoft’s High Frequency Structure Simulator (HFSS v. 14). Measured results are in good agreement with simulated results. The prototype is taken with dimensions 36 mm × 42 mm × 1.6 mm that achieves good return loss, constant group delay, and good radiation characteristics within the entire operating band from 4.5 to 13.5 GHz (9.0 GHz) with 100% impedance bandwidth at 9.0 GHz centre frequency. Thus, the proposed antenna is applicable for C and X band applications.

scholarly journals Frequency Reconfigurable Patch Antenna for L band Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 4775-4784
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Network Analyzer ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Telecommunication System ◽  
Pin Diodes ◽  
L Band ◽  
Novel Design

A novel design of a Frequency Reconfigurable patch antenna which has applications in the L- Band, namely, radars, GPS, telecommunication system and aircraft surveillance is presented in this paper. The antenna having dimensions of 34.45mm x 45.64mm has been designed using Ansys HFSS. It is a microstrip line inset fed patch antenna with square concentric rings as Defected Ground Structure (DGS) and FR-4 as the substrate. Two PIN diodes, BAR 63-02V, have been used on the ground plane to carry out switching in the frequency domain. The simulated results depict the frequency shift from 1.612 MHz to 1.815 MHz for different combinations of PIN diodes while keeping the radiation patterns intact. The simulated S11 values are well below the – 10dB value in all the four combinations. The average impedance bandwidth obtained is 400 MHz. The measured results on the fabricated antenna using Vector Network Analyzer are in close approximation to the simulated results.

scholarly journals A Compact Rectangular Microstrip Patch Antenna Loaded with Stubs and Defected Partial Ground Structure for UWB Systems

2019 ◽  
Vol 8 (9S) ◽  
pp. 155-160
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Microstrip Patch Antenna ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna ◽  
Microstrip Feed

This paper presents the prototype and simulations of a compact rectangular microstrip patch antenna for ultra-wideband applications. The proposed antenna is printed on FR4 (Flame Retardant) substrate with relative permittivity of 4.4, dielectric loss tangent of 0.0024 and the dimensions of 57 × 25 × 1.57 mm3 . The radiating patch of the antenna is loaded with two rectangular stubs along its upper and lower edges and an equilateral triangular notch is truncated from the reduced ground plane to achieve optimum results in terms of bandwidth and reflection coefficient. It is fed along the centerline of symmetry by 50Ω microstrip feed line. The simulated return loss ( ) characteristics show that the proposed antenna has a capability of covering the wireless bands from 0.17GHz to 7.25GHz with impedance bandwidth of 7.08GHz and exhibits a peak gain of 5dB at 7.25GHz which is acceptable for UWB systems.

scholarly journals Enhancing the resonance characteristics of circular patch antenna for SHF applications

2021 ◽  
Author(s):  
Mousaab M. Nahas ◽  
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Microstrip Antenna ◽  
Low Cost ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Ultra Wideband ◽  
Uwb Antenna ◽  
High Frequency Structure Simulator ◽  
Circular Patch Antenna

Microstrip patch antenna is attractive for various applications due to its easy fabrication, low cost and small size. It simply comprises of a radiating patch and ground plane that are separated by a dielectric substrate. However, the resonance bandwidth of the microstrip antenna is still an issue that needs to be considered in research. This paper aims to enhance the bandwidth of a microstrip antenna or introduce more resonant frequencies within the Super High Frequency (SHF) band. The paper demonstrates empirical results for circular-shaped patch antenna using the High Frequency Structure Simulator (HFSS). It begins by investigating different patch sizes and substrate materials, so that an optimal preliminary design is introduced. Then, different slot shapes are inserted into the patch for significant enhancement of the resonance characteristics. As a result, new ultra-wideband (UWB) antenna designs are presented with bandwidth results reaching 15.5 GHz within the C, X, Ku and K bands. Also, new multiband antenna designs are presented with improved reflection valleys in the Ku, K and Ka bands.

scholarly journals A Compact Ultra-Wideband Monopole Antenna with Dual Bandstop Characteristics

2013 ◽  
Vol 347-350 ◽  
pp. 1695-1698 ◽  
Author(s):  
Wen Li ◽  
Jun Jun Wang ◽  
Yan Chao Sun ◽  
Xian Chao Meng
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Local Area ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Compact Size

A compact and simple ultra-wideband microstrip-fed planar antenna with double bandstop characteristic is presented. The antenna consists of a rectangular monopole and two W-shaped slots inserted into the radiating patch and the truncated ground plane. By using a W-shaped slot defected ground structure (DGS) in the feedline, a stopband of 800 MHz (from 5.1 to 5.9 GHz) for band rejection of wireless local area network (WLAN) is achieved. To obtain the other stopband (from 3.7-4.4 GHz), a same shaped slot is etched into the monopole. Moreover, the two stopbands can be controlled by adjusting the length of the slot respectively. The simulation results show that the designed antenna, with a compact size of 38.5 mm×42.5 mm, has an impedance bandwidth of 2.811 GHz for voltage standing wave ratio (VSWR) less than 2, besides two frequency stopbands of 3.74.4 GHz and 5.15.9 GHz. Moreover, the main features including omnidirectional H-plane radiation patterns and the appropriate impedance characteristic are achieved by beveling the radiating patch and the microstrip-fed line of the proposed antenna.

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