scholarly journals Ladder Arrangement Method for Stealth Design of Vivaldi Antenna Array

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
XiaoXiang He ◽  
SaiSai Huang ◽  
Teng Chen ◽  
Yang Yang
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Design Method ◽  
Radiation Patterns ◽  
X Band ◽  
S Parameters ◽  
Vivaldi Antenna ◽  
Element Array ◽  
Vivaldi Antennas ◽  
Radiation Direction

A novel stealth design method for X-band Vivaldi antenna arrays is proposed in this paper by ladder arrangement along radiation direction. Two-element array, eight-element array, and 3 × 7-element array are investigated in this paper. S parameters, RCSs, and radiation patterns are studied, respectively. According to the ladder arrangement of Vivaldi antennas presented, 16.3 dBsm maximal RCS reduction is achieved with satisfied radiation performance. As simulated and measured, results demonstrate that the effectiveness of the presented low RCS design method is validated.

scholarly journals Improvement on a 2 × 2 Elements High-Gain Circularly Polarized Antenna Array

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
C. Liu ◽  
A. Yan ◽  
C. Yu ◽  
T. Xu
Keyword(s):  
Antenna Array ◽  
Axial Ratio ◽  
High Gain ◽  
Center Frequency ◽  
The Novel ◽  
Orthorhombic Structure ◽  
Commercial Communication ◽  
Vivaldi Antenna ◽  
Serrated Structure ◽  
Vivaldi Antennas

A novel antipodal Vivaldi antenna with tapering serrated structure at the edges is proposed. Compared with traditional Vivaldi antennas without serrated structure, the gain of the designed antenna is significantly improved in the desired frequency band (4.5–7.5 GHz). In addition, a 2 × 2 Vivaldi antenna array with an orthorhombic structure is designed and fabricated to achieve a circular polarization (CP) characteristic. With this configuration, the 3 dB axial ratio bandwidth of the array reaches about 42% with respect to the center frequency of 6 GHz and a high gain is achieved as well. The novel Vivaldi antenna and CP antenna array both have ultrawide band (UWB) and high-gain characteristics, which may be applied to the field of commercial communication, remote sensing, and so forth.

scholarly journals A New Linear Printed Vivaldi Antenna Array with Low Side Lobe Level and High Gain for the Band 3.5 GHz

2020 ◽  
Author(s):  
Luong Xuan Truong ◽  
Truong Vu Bang Giang ◽  
Tran Minh Tuan
Keyword(s):  
Antenna Array ◽  
Simulated Data ◽  
Bat Algorithm ◽  
Side Lobe ◽  
High Gain ◽  
Control Technique ◽  
Side Lobe Level ◽  
Low Sidelobe ◽  
Vivaldi Antenna ◽  
Vivaldi Antennas

This paper proposes a new design of low sidelobe level (SLL) and high gain linear printed Vivaldi antenna array. The array composes of two parts, which are a linear Vivaldi antenna array and a back reflector. The array consists of 10 single Vivaldi antennas and a series-fed network, those are based on Roger RO4003C substrate (ε = 3.55) with the dimension of 140 x 450 x 1.524 mm3. A new Bat algorithm with the amplitude-only control technique has been applied to optimize the output coefficients of the series-fed network for gaining a low SLL. The simulation results indicate that the proposed antenna provides a low SLL of -29.2 dB in E-plane with a high gain of 16.5 dBi at the frequency of 3500 MHz. A prototype of the proposed antenna array has been fabricated. The measured data has a good agreement with the simulated data.

Design and implementation of artificial magnetic conductor surface as decoupling structure in microstrip antenna arrays

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Khader Zelani Shaik ◽  
Siddaiah P. ◽  
K. Satya Prasad
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
Mutual Coupling ◽  
Return Loss ◽  
Wave Spectrum ◽  
Magnetic Conductor ◽  
Content Type ◽  
Artificial Magnetic Conductor ◽  
S Parameters

Purpose Millimeter wave spectrum represents new opportunities to add capacity and faster speeds for next-generation services as fifth generation (5G) applications. In its Spectrum Frontiers proceeding, the Federal Communications Commision decided to focus on spectrum bands where the most spectrums are potentially available. A low profile antenna array with new decoupling structure is proposed and expected to resonate at higher frequency bands, i.e. millimeter wave frequencies, which are suitable for 5G applications. Design/methodology/approach The presented antenna contains artificial magnetic conductor (AMC) surface as decoupling structure. The proposed antenna array with novel AMC surface is operating at 29.1GHz and proven to be decoupling structure and capable of enhancing the isolation by reducing mutual coupling as 8.7dB between the array elements. It is evident that, and overall gain is improved as 10.1% by incorporating 1x2 Array with AMC Method. Mutual coupling between the elements of 1 × 2 antenna array is decreased by 39.12%. Findings The proposed structure is designed and simulated using HFSS software and the results are obtained in terms of return loss, gain, voltage standing wave ratio (VSWR) and mutual coupling. The S-Parameters of each stage of design is tabulated and compared with each other to prove the decoupling capability of AMC surface in antenna arrays. Originality/value The proposed structure is designed and simulated using HFSS software, and the results are obtained in terms of return loss, gain, VSWR and mutual coupling. The S-Parameters of each stage of design is tabulated and compared with each other to prove the decoupling capability of AMC surface in antenna arrays.

scholarly journals Active Patch Antenna for Wi-Fi 5, 6 and Wi-Fi 6E Applications

2021 ◽  
Vol 2096 (1) ◽  
pp. 012010
Author(s):  
E A Ischenko ◽  
Yu G Pasternak ◽  
V A Pendyurin ◽  
S M Fedorov
Keyword(s):  
Antenna Array ◽  
Correlation Coefficient ◽  
Patch Antenna ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Mimo Antenna ◽  
S Parameters ◽  
Envelope Correlation

Abstract The article discusses a planar patch antenna with a metamaterial integrated into the structure, which allows the antenna to function in the upper Wi-Fi 5, 6 frequency range and the Wi-Fi 6E range. For the study, we built graphs of S-parameters, radiation patterns; on the basis of the resulting structure, we formed a MIMO antenna array for which we determined the main characteristics - the envelope correlation coefficient and the multiplexing efficiency

scholarly journals Enhanced radiation characteristics for antipodal Vivaldi antenna using high permittivity dielectric director

2017 ◽  
Vol 07 (03) ◽  
pp. 1750018 ◽  
Author(s):  
Rabiaa Herzi ◽  
Moufida Bouslama ◽  
Ali Gharsallah
Keyword(s):  
Antenna Array ◽  
Frequency Band ◽  
Mutual Coupling ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Radiation Patterns ◽  
Antenna Aperture ◽  
Radiation Characteristics ◽  
High Permittivity ◽  
Vivaldi Antenna

In this paper, we investigate the influence of higher permittivity dielectric director on the radiation performances of an antipodal Vivaldi antenna. An elliptical dielectric director with high permittivity is inserted in an antipodal Vivaldi antenna aperture in order to ameliorate the radiation characteristics of the antenna. Due to the capacity of elevated permittivity dielectric to confine and guide energy in the desired direction, an increment of 4[Formula: see text]dB in the gain of the antenna is obtained. This antenna, which covers an ultra-wide frequency band of 146.8% from 2.3[Formula: see text]GHz to 15[Formula: see text]GHz, has approximately regular radiation patterns with reduced side lobe level and narrower beamwidth. In the interest to achieve radar application necessities, the proposed antenna is exploited to develop an antenna array which consists of four connected elements. Adding dielectric directors can significantly enhance the radiations characteristics of the antenna and reduce the mutual coupling inter-elements. So using four elements with dielectric director in the antenna array can achieve the same results obtained with eight elements without directors. This can decrease the used number of elements that form the antenna array.

scholarly journals A Novel Low RCS Design Method for X-Band Vivaldi Antenna

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
XiaoXiang He ◽  
Teng Chen ◽  
Xin Wang
Keyword(s):  
Cross Section ◽  
Current Distribution ◽  
Design Method ◽  
Radar Cross Section ◽  
X Band ◽  
Vivaldi Antenna ◽  
The Difference

A novel low radar cross-section (RCS) design method is proposed, and its application on Vivaldi antenna that covers the entire X band is investigated. According to the difference of the current distribution on the radiator when the antenna radiates or scatters, the shape of the metal radiator is modified, so that maximally 19.2 dBsm RCS reduction is achieved which satisfied radiation performance. Simulated and measured results about gain, S11, and RCS are presented. As a result, the effectiveness of the presented low RCS design method is validated.

scholarly journals A New and Simple Design Method for End-Fire Dipole Antenna Array and Three Two-Element 24 GHz Planar End-Fire Dipole Antenna Arrays

2021 ◽  
Vol 11 (16) ◽  
pp. 7720
Author(s):  
Yanfei Mao ◽  
Shiju E ◽  
Chungeng Zhu
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Design Method ◽  
Beam Width ◽  
High Gain ◽  
Dipole Antenna ◽  
Simple Design ◽  
System A ◽  
Half Power ◽  
24 Ghz

For an RF system, a high-gain antenna helps to improve the equivalent isotropic radiated power (EIRP) of the transmitter and an end-fire antenna array helps to improve the directivity (D) and half power beam width (HP) of the antenna. This work presents a new and simple design method for end-fire antenna array design. The method states that when antenna elements are λ/2 apart, a simple end-fire antenna array could be designed and constructed easily without matching networks between antenna elements. Utilizing Rogers 4350 PCB technology, three 24 GHz high-gain, compact planar two-element end-fire dipole antenna arrays are designed to verify this new design method. The achieved results are three two-element end-fire antennas with gains of 8.8, 9.9 and 9.1 dBi. These antenna arrays are characterized by high gain and simplicity in design. They are also very compact in size, with an area of about 1.9 × 1.7 cm2. The benefit of this work is that a new and simple design for end-fire antenna design is suggested, and three two-element end-fire dipole antenna arrays in planar technology which adopt the design method are presented. A utility model patent was granted for this end-fire dipole array antenna topology, ZL 202022106332.1.

scholarly journals An X-Band Dual-Polarized Vivaldi Antenna with High Isolation

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Denghui Huang ◽  
Hu Yang ◽  
Yuqing Wu ◽  
Fei Zhao
Keyword(s):  
Antenna Design ◽  
High Isolation ◽  
X Band ◽  
Vivaldi Antenna ◽  
The Cross ◽  
Dual Polarized ◽  
Vivaldi Antennas ◽  
Better Than

An X-band dual-polarized Vivaldi antenna with high isolation is proposed. The procedure of this antenna design includes the conventional Vivaldi antenna with regular slot edge (RSE), the dual-polarized Vivaldi antenna with two Vivaldi antennas which have different feeding point positions in a cross-shaped form, and the two Vivaldi antennas with a galvanic contact in soldering point. By applying the RSE, it reduced the dimensions of the Vivaldi antenna and improved its radiation performance. The modified antenna is fabricated and measured. The measured results show that S11<-10 dB at the entire X-band for the two Vivaldi antennas. The isolation (S21) between the two feeding ports, which has been improved by applying the different feeding point positions and the galvanic contact in soldering point, is better than 34 dB at X-band. In addition, the cross-polarized discrimination is better than 21 dB for the two Vivaldi antennas, and the measured results also include the gain of two Vivaldi antennas.

scholarly journals Design of Wideband Antenna Array with Dielectric Lens and Defected Ground Structure

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2066
Author(s):  
Jinhang Wang ◽  
Wenjie Cui ◽  
Yang Zhou ◽  
Ruipeng Liu ◽  
Mengjun Wang ◽  
...  
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Design Method ◽  
Ground Plane ◽  
Experimental Results ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Dielectric Lens ◽  
Feed Network ◽  
Element Array

In order to increase the gain of an end-fire antenna array and improve its broadband characteristics, techniques using a dielectric lens and defected ground structure have been investigated in this paper. The element of the array was constructed using an antipodal tapered slot, and two pairs of U-slots were symmetrically cut on the edges of the two antipodal fins to obtain better performance regarding impedance and radiation in the wider band. While loading an ellipse dielectric lens onto each element, the direction and gain were enhanced at the higher frequency. Meanwhile, a defected ground structure was added on the ground plane to decline the mutual coupling of adjacent radiation arms. This design method was verified by a four-element array and a four-way Wilkinson power divider was used as a feed network. Finally, a fabricated sample was tested. Experimental results showed the designed array was available.

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