scholarly journals Yagi Array of Microstrip Quarter-Wave Patch Antennas with Microstrip Lines Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Juhua Liu ◽  
Yue Kang ◽  
Jie Chen ◽  
Yunliang Long
Keyword(s):  
Horizontal Plane ◽  
Return Loss ◽  
High Gain ◽  
Main Beam ◽  
Patch Antennas ◽  
Vertical Polarization ◽  
Microstrip Lines ◽  
Low Profile ◽  
Quarter Wave ◽  
Peak Gain

A new kind of Yagi array of quarter-wave patch antennas is presented. The Yagi array has a low profile, a wide bandwidth, and a high gain. A main beam close to endfire is produced, with a vertical polarization in the horizontal plane. A set of microstrip lines are introduced between the driven element and the first director element to enhance the coupling between them, and therefore the bandwidth could be increased and the back lobes could be suppressed. Measured results show that the Yagi array with 4 elements generates a peak gain of about 9.7 dBi, a front-to-back ratio higher than 10 dB, and a 10 dB return loss band from 4.68 GHz to 5.24 GHz, with a profile of 1.5 mm and an overall size of 80 × 100 mm2. An increase of the number of director elements would enhance the gain and have the main beam pointing closer to endfire.

scholarly journals A Low-Profile High-Gain and Wideband Log-Periodic Meandered Dipole Array Antenna with a Cascaded Multi-Section Artificial Magnetic Conductor Structure

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4404 ◽  
Author(s):  
Son Trinh-Van ◽  
Oh Heon Kwon ◽  
Euntae Jung ◽  
Jinwoo Park ◽  
Byunggil Yu ◽  
...  
Keyword(s):  
High Gain ◽  
Operating Frequency ◽  
Main Beam ◽  
Impedance Bandwidth ◽  
Beam Direction ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Low Profile ◽  
Operating Bandwidth ◽  
Meander Line

This paper presents a low-profile log-periodic meandered dipole array (LPMDA) antenna with wideband and high gain characteristics. The antenna consists of 14 dipole elements. For compactness, a meander line structure is applied to each dipole element to reduce its physical length. As a result, a compact and wideband LPMDA antenna is realized, exhibiting a wide impedance bandwidth of 1.04–5.22 GHz (ratio bandwidth of 5.02:1) for | S 11| < −10 dB. To enhance the antenna gain performance while maintaining the wideband behavior, the LPMDA antenna is integrated with a new design of an artificial magnetic conductor (AMC) structure. The designed AMC is realized by combining three AMC structures of different sizes to form a cascaded multi-section AMC structure, of which its overall operating bandwidth can continuously cover the entire impedance bandwidth of the LPMDA antenna. The proposed AMC-backed LPMDA antenna is experimentally verified and its measured −10 dB reflection bandwidth is found to be in the range of 0.84–5.15 GHz (6.13:1). At the main beam direction within the operating frequency bandwidth, the gain of the proposed AMC-backed LPMDA antenna ranges from 7.15–11.43 dBi, which is approximately 4 dBi higher than that of an LPMDA antenna without an AMC. Moreover, the proposed antenna has a low profile of only 0.138 λ L. ( λ L is the free-space wavelength at the lowest operating frequency).

Design of ultra-wide tetra band phased array inverted T-shaped patch antennas using DGS with beam-steering capabilities for 5G applications

2020 ◽  
Vol 12 (5) ◽  
pp. 419-430
Author(s):  
Muhammad Anas ◽  
Hifsa Shahid ◽  
Abdul Rauf ◽  
Abdullah Shahid
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
High Gain ◽  
Ultra Wideband ◽  
Main Beam ◽  
Antenna Element ◽  
Patch Antennas ◽  
Defected Ground Structure ◽  
Phased Array Antenna ◽  
Millimeter Wave Antenna

AbstractA novel 1 × 4 phased array elliptical inverted T-shaped slotted sectored patch antenna with defected ground structure (DGS), resonate at proposed ultra-wide tetra band at 28, 43, 51, and 64 GHz with high gain and beam-steering capabilities is presented. An inverted T-shaped slotted stub is used with the sectored patch to achieve ultra-wideband properties. In order to resonate the antenna at four different bands, DGS of round bracket slot is etched on the ground. The 1 × 4 phased arrays are used at the top edge and bottom edge of mobile PCB with high gain. The simulation results show that the antenna has four ultra-wide bands: 25.8–29.7, 40.6–44.6, 49.2–53.1, and 62.2–74 GHz with a maximum gain of 16.5 dBi at 51 GHz. The phased array antenna is capable to steer its main beam within ±30° at the 26, 28, and 43 GHz, using appropriate phase shifts of each antenna element. The proposed millimeter wave antenna is particularly suitable for cellular infrastructures and can be a candidate for emerging 5G mobile applications. The availability of an additional 11.8 GHz (62.2–74 GHz) of contiguous unlicensed spectrum will allow the launching of new exciting wireless services.

scholarly journals DESIGN AND ANALYSIS OF ULTRA WIDE BAND ELLIPTICAL SLOT WITH QUARTER WAVE TRANSMISSION LINE GROUND FOR WIRELESS APPLICATIONS

2021 ◽  
Vol 9 (1) ◽  
pp. 22-31
Author(s):  
M. Saravanan, K. Devarajan
Keyword(s):  
Transmission Line ◽  
Return Loss ◽  
Wide Band ◽  
High Gain ◽  
Wave Transmission ◽  
Antenna Design ◽  
Uwb Antenna ◽  
Ground Structure ◽  
Wireless Applications ◽  
Quarter Wave

UltraWide Bandwidth (UWB) antenna with Deflected Ground Structure for wireless communication is presented in this paper. Our proposed antenna design is consisting of elliptical shape slot at patch and Quarter wave transmission line at the ground with multiband frequency operation in various wireless communications.An antenna is designed using FR4 substrate with permittivity value of 4.4 and thickness of 0.8 mm. The size of the antenna is 50 x 70 mm2presents a high gain of 4 dB with Ultra Wide Bandwidth. In proposed antenna quarter wave ground is imposed with Deflected Ground Structure to achieve overall size reduction. The ultra bandwidth antenna proposed in this paper operates at multiband frequencies centered at 3.0267 GHz, 6.1933 GHz, 9.1911 GHz, 12.1467 GHz, and 15.06 GHz with corresponding return loss of -24.0553 dB, -40.9292 dB, -20.7534 dB, -41.8718 dB, -30.1747 dB.

A Low-Profile and Beam-tilted Continuous Transverse Stub Array Antenna at W-band

2021 ◽  
Vol 36 (7) ◽  
pp. 894-900
Author(s):  
Demiao Chu ◽  
Yujun Xiong ◽  
Ping Li
Keyword(s):  
Transmission Lines ◽  
Design Procedure ◽  
High Gain ◽  
Path Difference ◽  
Array Antenna ◽  
Main Beam ◽  
W Band ◽  
Low Profile ◽  
Parallel Plate Waveguide ◽  
Wave Path

This paper presents a low-profile, high gain, beam-tilted continuous transverse stub (CTS) array antenna at W-band. The antenna compromises 32 radiating slots and is fed by a parallel plate waveguide (PPW) network with a linear source generator. To deflect the outgoing beam, the principle of linear array scanning is adopted to design inverted T-type structure in each stub to introduce wave path difference. PPW network allows the antenna to obtain lower profile compared to other transmission lines. The design procedure, and the antenna characterization are described. The main beam of the antenna is titled 12 degree in H-plane. The simulation and measured results show that this antenna achieves peak gain of 32.4 dB and a 12 degree beam tilt angle at 99GHz. S11 parameters of the antenna is less than -10 dB in a broadband from 96 GHz to 103 GHz. This antenna has an advantage of miniaturization over other high-gain antenna solutions. The promising performance of this proposed CTS antenna reveals the possible candidate for Millimeter wave (MMW) telecommunication applications.

scholarly journals Maple leaf shaped array antenna for multiband applications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 494
Author(s):  
M Vasujadevi ◽  
B T P Madhav ◽  
A Shiva Skandan ◽  
P Rajeswari ◽  
K Arjun Rao ◽  
...  
Keyword(s):  
Traffic Control ◽  
Return Loss ◽  
High Gain ◽  
Array Antenna ◽  
Single Antenna ◽  
X Band ◽  
Military Applications ◽  
Field Radiation ◽  
Peak Gain ◽  
Ku Band

This article presents design and analysis of maple leaf shaped array antenna for high gain applications. The proposed antenna is characterized and analyzed using ANSYS EM desktop 17. This antenna works at 2.17-2.54(S band),5.3-5.64, 6.91-7.80(C Band), 8.76-9.15(X band), 12.49-12.75, 14.78-16.65(Ku band). The bands of the proposed antenna has its applications at LTE 2.3 GHz, ISM 2.4 GHz, WLAN, ISM, Bluetooth at S-band and upper WLAN at C-band, Military applications and air traffic control at X-band. This single antenna dimensioned 21x18x1.6 mm³ is later arrayed in 1x4. This antenna has peak gain at 7.8dB and the average gain of 4.2dB. The proposed 1x4 array antenna is characterized and obtained return loss, gain, E field, current distribution and far field radiation patterns.

scholarly journals Designing of a 2x2 E-shaped Microstrip Patch Grid Antenna

2021 ◽  
Vol 20 ◽  
pp. 123-127
Author(s):  
Juhi K. Baruah ◽  
Kandarpa Kumar Sarma ◽  
Sivaranjan Goswami
Keyword(s):  
Return Loss ◽  
Beam Width ◽  
Single Element ◽  
Patch Antennas ◽  
Gain Bandwidth ◽  
Microstrip Lines ◽  
Microstrip Patch ◽  
Loss Parameter ◽  
Feed Network ◽  
Simulation Results

In this work, a 2×2 grid of E-shaped patch antennas is proposed. The design of the grid is achieved through the design of a single element, the design of a 1×2 array and finally the design of the 2×2 grid on an FR4 epoxy substrate of thickness 1.5 mm. A corporate feed network of microstrip lines is used to excite the array. The performance of each stage is studied in terms of the return loss parameter, the far field gain, and the beam-widths are observed in each case from simulation results. The resonant frequency in each case is 3.8 GHz. It is observed that as the number of elements is increased, the beam-width reduces. In other words, the directivity is increased. Further, it is also observed that the gain and bandwidth is the minimum for the single patch, followed by that of the 1×2 array and the maximum for the 2×2 grid. Thus, the construction of the grid leads to increase in gain, bandwidth and directivity of the antenna.

scholarly journals Design of Yagi Antenna with Slow-Wave Half-Mode SIW Feeding Technique for Ku Band Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Bo Han ◽  
Shibing Wang ◽  
Jia Zhao ◽  
Xiaofeng Shi
Keyword(s):  
Slow Wave ◽  
Return Loss ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Yagi Antenna ◽  
Feeding Technique ◽  
Low Insertion Loss ◽  
Microwave Substrate ◽  
Peak Gain ◽  
Ku Band

A novel planar Yagi antenna printed on a microwave substrate with dielectric constant of 3.55 for Ku band applications has been presented in this paper. The proposed antenna has been fed by the slow-wave half-mode substrate-integrated waveguide and has achieved good characteristics, such as reduced size, high gain, broadband, and low insertion loss. The proposed antenna has been fabricated by Rogers 4350 substrate with lengths of two arms for dipole 0.46 λ0. Measured results indicate that the impedance bandwidth (below −10 dB return loss) is from 15.4 GHz to 19.4 GHz with peak gain 7.49 dBi. Both simulations and experiments convince that the proposed antenna could have reliable applications for Ku band wireless communications.

Design of a compact high gain printed octagonal array of spiral-based fractal antennas for DBS application

2020 ◽  
Vol 12 (8) ◽  
pp. 769-781
Author(s):  
Kalyan Sundar Kola ◽  
Anirban Chatterjee ◽  
Deven Patanvariya
Keyword(s):  
High Gain ◽  
Main Beam ◽  
Single Element ◽  
Patch Antennas ◽  
Cross Polarization ◽  
Beam Direction ◽  
Microstrip Patch Antennas ◽  
Spiral Geometry ◽  
Feed Network ◽  
Direct Broadcast Satellite

AbstractThis paper presents a compact octagonal array of microstrip patch antennas for direct broadcast satellite (DBS) (12.2–12.7 GHz) services. The proposed single element of this array is a new fractal antenna, having considerably high gain and can heavily suppress cross polarization along the main beam direction. The single element is derived from a 2D spiral geometry. The corporate feed network of the array is designed in such a manner to make the structure very compact. The fabricated single element resonates at 12.51 GHz and gives a gain and bandwidth of 9.32 dBi and 280 MHz, respectively. The array resonates at 12.46 GHz and gives gain of 17.67 dBi and a bandwidth of 506 MHz, which ensures a 100% coverage of the entire DBS service band. The measured cross polarization of single element and array along the direction of main beam are −45.50 and −43.35 dB, respectively. Both the single element as well as the array maintains a reasonably good radiation efficiency of 86.70 and 82.20%, respectively.

scholarly journals Fully Integrated High Gain S-Band Triangular Slot Antenna for CubeSat Communications

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 156
Author(s):  
Mohamed El Bakkali ◽  
Moulhime El Bekkali ◽  
Gurjot Singh Gaba ◽  
Josep M. Guerrero ◽  
Lavish Kansal ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Impedance Matching ◽  
Electronic Devices ◽  
Wide Band ◽  
High Gain ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Fully Integrated ◽  
Low Profile

Among other CubeSat subsystems, Antenna is one of the most important CubeSat components as its design determines all the telecommunication subsystems’ performances. This paper presents a coplanar wave-guide (CPW)-fed equilateral triangular slot antenna constructed and analyzed for CubeSat communications at S-band. The proposed antenna alone presents high gain and ultra-wide band while its radiation pattern is bidirectional at an unlicensed frequency of 2450 MHz. The objective is to use the CubeSat chassis as a reflector for reducing the back-lobe radiation and hence minimizing interferences with electronic devices inside the CubeSat. This leads to a high gain of 8.20 dBi and a unidirectional radiation pattern at an industrial, scientific and mdical (ISM) band operating frequency of 2450 MHz. In addition to that, the presented antenna is low-profile and exhibits high return loss, ultra-wide impedance bandwidth, and good impedance matching at 2450 MHz.

scholarly journals A design of lens antenna with high gain

2021 ◽  
Vol 336 ◽  
pp. 01005
Author(s):  
Darong Gao
Keyword(s):  
Wireless Communications ◽  
Microstrip Antenna ◽  
Return Loss ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Lens Antenna ◽  
Communications Systems ◽  
Dielectric Lens ◽  
Wireless Communications Systems ◽  
Peak Gain

In this paper, A lens antenna with high gain is proposed. The antenna is composed of the microstrip antenna and the hemisphere dielectric lens, and the lens is loaded on the top. The polyethylene is used to fabricated the hemisphere dielectric lens. The antenna has dimensions of 47.58 mm × 47.58 mm × 24.79 mm, which is corresponding to the electrical size of 1.586λ0×1.586λ0×0.826λ0, where λ0 is the free-space wavelength at 10GHz. The impedance bandwidth (return loss<-10dB) is 12.7%(9.24 GHz-10.51 GHz), and the peak gain is 9.06 dBi. The hemisphere dielectric lens can improve the gain of the microstrip antenna. The proposed lens antenna is suitable for wireless communications systems.

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