scholarly journals Structure-Based Evolutionary Programming Design of Broadband Wire Antennas

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Giovanni Andrea Casula ◽  
Giuseppe Mazzarella ◽  
Giorgio Montisci
Keyword(s):  
Radiation Pattern ◽  
Design Procedure ◽  
Evolutionary Process ◽  
Evolutionary Programming ◽  
High Gain ◽  
Design Technique ◽  
Broadband Antenna ◽  
Simple Geometry ◽  
Wire Antennas ◽  
Ku Band

A design technique for wire antennas, based on the Structure-Based Evolutionary Programming, is used to design a broadband antenna with an end-fire radiation pattern and a very simple geometry, operating in the 3–16 GHz frequency band, namely, from the S band to the Ku band. The antenna has been analyzed with NEC-2 during the evolutionary process, looking for high gain, good input match, and robustness with respect to realization tolerances. The outcome of our design procedure shows a very good performance.

scholarly journals High-Gain Vivaldi Antenna with Wide Bandwidth Characteristics for 5G Mobile and Ku-Band Radar Applications

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 667
Author(s):  
Raza Ullah ◽  
Sadiq Ullah ◽  
Farooq Faisal ◽  
Rizwan Ullah ◽  
Dong-you Choi ◽  
...  
Keyword(s):  
Mobile Communication ◽  
Middle Layer ◽  
Bottom Layer ◽  
High Gain ◽  
Mirror Image ◽  
Radar Applications ◽  
Vivaldi Antenna ◽  
5G Mobile Communication ◽  
Element Array ◽  
Ku Band

In this paper, antipodal Vivaldi antenna is designed for 5th generation (5G) mobile communication and Ku-band applications. The proposed designed has three layers. The upper layer consists of eight-element array of split-shaped leaf structures, which is fed by a 1-to-8 power divider network. Middle layer is a substrate made of Rogers 5880. The bottom layer consists of truncated ground and shorter mirror-image split leaf structures. The overall size of the designed antenna is confined significantly to 33.31 × 54.96 × 0.787 (volume in mm3), which is equivalent to 2λo× 3.3λo× 0.05λo (λo is free-space wavelength at 18 GHz). Proposed eight elements antenna is multi-band in nature covering Ku-bands (14.44–20.98 GHz), two millimeter wave (mmW) bands i.e., 24.34–29 GHz and 33–40 GHz, which are candidate frequency bands for 5G communications. The Ku-Band is suitable for radar applications. Proposed eight elements antenna is very efficient and has stable gain for 5G mobile communication and Ku-band applications. The simulation results are experimentally validated by testing the fabricated prototypes of the proposed design.

scholarly journals Wideband Dual-Polarized VHF Antenna for Space Observation Applications

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4351
Author(s):  
Alexandru Tatomirescu ◽  
Alina Badescu
Keyword(s):  
Radiation Pattern ◽  
Group Delay ◽  
High Gain ◽  
Antenna Element ◽  
Frequency Bandwidth ◽  
Radio Emissions ◽  
Relative Bandwidth ◽  
Pattern Stability ◽  
Dual Polarized ◽  
Delay Variation

This work presents the design for an antenna element that can be used in radio arrays for the monitoring and detecting of radio emissions from cosmic particles’ interactions in the atmosphere. For these applications, the pattern stability over frequency is the primary design goal. The proposed antenna has a high gain over a relative bandwidth of 88%, a beamwidth of 2.13 steradians, a small group delay variation and a very stable radiation pattern across the frequency bandwidth of 110 to 190 MHz. It is dual polarized and has a simple mechanical structure which is easy and inexpensive to manufacture. The measurements show that the ground has insignificant impact on the overall radiation pattern.

Evaluation Method of U-Bolt Energy Absorption

2009 ◽  
Author(s):  
Eiji Shirai ◽  
Tetsuya Zaitsu ◽  
Kazutoyo Ikeda ◽  
Toshiaki Yoshii ◽  
Masami Kondo ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Evaluation Method ◽  
Design Procedure ◽  
Piping System ◽  
Design Technique ◽  
Dynamic Tests ◽  
Key Issues ◽  
Static And Dynamic Tests ◽  
Force Displacement ◽  
Rigid Design

At domestic PWR plants in Japan, one of the major key issues is earthquake-proof safety [1–3]. Recently, a design procedure using energy absorption, not conventional rigid design, was authorized according to revised review guidelines for aseismic design (JEAC4601). Therefore, we focused on the design technique that utilizes energy absorption effects to reduce the seismic responses of the piping system with U-Bolt, by the static and dynamic tests of simplified piping model supported by U-Bolt. The force-displacement characteristics and a fatigue diagram were obtained by the tests.

scholarly journals A 60 GHz fully differential LNA in 90 nm CMOS technology

2013 ◽  
Vol 6 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Andrea Malignaggi ◽  
Amin Hamidian ◽  
Georg Boeck
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Transmission Lines ◽  
Noise Figure ◽  
Design Procedure ◽  
Cmos Technology ◽  
High Gain ◽  
Low Noise ◽  
60 Ghz ◽  
Fully Differential

The present paper presents a fully differential 60 GHz four stages low-noise amplifier for wireless applications. The amplifier has been optimized for low-noise, high-gain, and low-power consumption, and implemented in a 90 nm low-power CMOS technology. Matching and common-mode rejection networks have been realized using shielded coplanar transmission lines. The amplifier achieves a peak small-signal gain of 21.3 dB and an average noise figure of 5.4 dB along with power consumption of 30 mW and occupying only 0.38 mm2pads included. The detailed design procedure and the achieved measurement results are presented in this work.

Design of High Gain Broadband Microstrip Patch Antenna for UWB/X/Ku Band Applications

2021 ◽  
pp. 153905
Author(s):  
Tapas Tewary ◽  
Smarajit Maity ◽  
Surajit Mukherjee ◽  
Avisankar Roy ◽  
Partha Pratim Sarkar ◽  
...  
Keyword(s):  
Patch Antenna ◽  
High Gain ◽  
Microstrip Patch Antenna ◽  
Microstrip Patch ◽  
Ku Band

A Novel Multi-band High-Gain Slotted Fractal Antenna using Various Substrates for X-band and Ku-band Applications

MAPAN ◽  
2021 ◽  
Author(s):  
Aman Dahiya ◽  
Rohit Anand ◽  
Nidhi Sindhwani ◽  
Dhirendra Kumar
Keyword(s):  
High Gain ◽  
Fractal Antenna ◽  
X Band ◽  
Ku Band ◽  
Multi Band

scholarly journals A Circular Disc Microstrip Antenna with Dual Notch Band for GSM/Bluetooth and Extended UWB Applications

2018 ◽  
Vol 7 (2.16) ◽  
pp. 11
Author(s):  
Sanjeev Kumar ◽  
Ravi Kumar ◽  
Rajesh Kumar Vishwakarma
Keyword(s):  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Circular Disc ◽  
Ultra Wideband ◽  
Resonant Circuit ◽  
Frequency Range ◽  
Notch Band ◽  
Uwb Applications ◽  
Ku Band

A microstrip antenna with a circular disc design and modified ground is proposed in this paper. Circular shapes of different size have been slotted out from the radiating patch for achieving extended ultra wideband (UWB) with GSM/Bluetooth bands with maximum bandwidth of 17.7 GHz (0.88-18.6 GHz). Further, characteristic of dual notch band is achieved, when a combination of T and L-shaped slots are etched into the circular disc and ground plane respectively. Change in length of slots is controlling the notch band characteristics. The proposed antenna has rejection bandwidth of 1.3-2.2 GHz (LTE band), 3.2-3.9 GHz (WiMAX band) and 5.2-6.1 GHz (WLAN band) respectively. It covers the frequency range of 0.88-18.5 GHz with the VSWR of less than 2. Also, an equivalent parallel resonant circuit has been demonstrated for band notched frequencies of the designed antenna. The gain achieved by the proposed antenna is 6.27 dBi. This antenna has been designed, investigated and fabricated for GSM, Bluetooth, UWB, X and Ku band applications. The stable gain including H & E-plane radiation pattern with good directivity and omnidirectional behavior is achieved by the proposed antenna. Measured bandwidths are 0.5 GHz, 0.8 GHz, 1.1 GHz and 11.7 GHz respectively. 

Design and fabrication of a high gain, low cost, LHCP Fabry‐Perot antenna at Ku band

2018 ◽  
Vol 61 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Yousef Azizi ◽  
Nader Komjani ◽  
Majid Karimipour
Keyword(s):  
Low Cost ◽  
High Gain ◽  
Fabry Perot ◽  
Ku Band
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