Design and Experimental Research on a Miniaturized Archimedean Spiral Antenna

2012 ◽  
Vol 229-231 ◽  
pp. 1618-1621
Author(s):  
Ming Jiang ◽  
Li Zhong Song
Keyword(s):  
Experimental Research ◽  
Wide Band ◽  
Electronic Systems ◽  
Frequency Range ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Wide Beam ◽  
Radar Systems ◽  
Operating Frequency Range ◽  
Meander Line

The Archimedean spiral (ARSP) antenna is widely used in many wide band electronic systems due to its good radiation performances. This paper designed and fabricated a specific planar ARSP antenna within the operating frequency range of 1 GHz to 9GHz. The meander line technique was employed to miniaturize the planar ARSP antenna. The designed ARSP antenna was fed by a wide band miniaturized bent microstrip Balun. The diameter of the fabricated ARSP antenna was 82 millimeters. A metal cavity filled with absorber materials was used to obtain the unidirectional radiation patterns and its height was 30 millimeters. The parameters of designed ARSP antenna were determined by numerical simulations. A practical designed ARSP antenna was fabricated according to designed parameters and the experimental results of the fabricated ARSP antenna are provided. The experimental research results demonstrate that the fabricated ARSP antenna has radiation performances of wide beam and approximately circular polarization. The fabricated ARSP antenna can be used in several practical electronic systems such as wide band radar systems.

Experimental Research on an Antipodal Vivaldi Antenna with Wide Band

2013 ◽  
Vol 631-632 ◽  
pp. 1022-1025 ◽  
Author(s):  
Ming Jiang ◽  
Li Zhong Song ◽  
Xin Tong ◽  
Liang Fang
Keyword(s):  
Experimental Research ◽  
Wide Band ◽  
Operating Frequency ◽  
Electronic Systems ◽  
Practical Application ◽  
Frequency Range ◽  
Operating Frequency Range ◽  
Vivaldi Antenna ◽  
Simulation Parameters ◽  
Vivaldi Antennas

The Vivaldi antenna is a kind of wide band antenna, which is widely used in many wide band electronic systems. This paper designed and fabricated a specific antipodal Vivaldi antenna (AVA) for practical application. The operating frequency range of fabricated AVA is from 2 GHz to 11GHz. The length and width of the fabricated AVA are 92.7millimeter and 110.4millimeter, respectively. A practical AVA was fabricated according to simulation parameters. The experimental results of the AVA are provided and analyzed. For the fabricated AVA, the measured average voltage standing wave ratio (VSWR) is 2 and gains are higher than 0 dB within the operating frequency range. Meanwhile, the wide beam performances are also observed. The experimental research on the AVA can be as a technical reference for the design and implementation of other Vivaldi antennas.

Design and Performance Simulation of Two Kinds of Antipodal Vivaldi Antennas for Wide Band Radar Systems

2012 ◽  
Vol 170-173 ◽  
pp. 2893-2898
Author(s):  
Li Zhong Song ◽  
Huan Feng Hong ◽  
Jing Hong Xue
Keyword(s):  
Wide Band ◽  
Operating Frequency ◽  
Design Parameters ◽  
Electronic Systems ◽  
Strip Line ◽  
Frequency Range ◽  
Operating Frequency Range ◽  
Vivaldi Antenna ◽  
And Performance ◽  
Vivaldi Antennas

The Vivaldi antennas are widely used in many wide band electronic systems for its good performances. This paper designed and simulated two kinds of Vivaldi antennas for wide band passive radar applications, which are the antipodal Vivaldi antenna fed by strip line and antipodal Vivaldi antenna fed by microstrip line. The specific design parameters and the radiation performances of each kind of vivaldi antenna are provided over the operating frequency range of 3GHz to 11GHz. Furthermore a circular antenna array with six Vivaldi antenna elements fed by microstrip lines was also simulated to obtain its radiation performances over the operating frequency range of 3GHz to 8GHz. The simulation results demonstrate the designed Vivaldi antennas have acceptable performances of voltage standing wave ratio (VSWR), patterns and gains, so they can be used in practical wide band radars.

Design of a Kind of Combined Antenna with Wide Band for Passive Radar Application

2013 ◽  
Vol 325-326 ◽  
pp. 930-934
Author(s):  
Li Zhong Song ◽  
Xi Li ◽  
Bing Xia Cao
Keyword(s):  
Simple Structure ◽  
Low Cost ◽  
Characteristic Impedance ◽  
Wide Band ◽  
Operating Frequency ◽  
Passive Radar ◽  
Frequency Range ◽  
Archimedean Spiral ◽  
Operating Frequency Range ◽  
Polarization Characteristics

The wide band antenna is a key technique for the passive radar. This paper proposed a new kind of wide band antenna combined with the Archimedean spiral and hemispherical helix for passive radar application. For the new antenna, the planar Archimedean spiral is mounted on the top of the hemispherical helix, and it is fed at the center of the Archimedean spiral. An antenna with specific structure and parameters was designed and simulated to obtain its radiation performances over the operating frequency range from 2GHz to 10GHz. For entire operating frequency range, the simulated gain is greater than 5 dBi and the voltage standing wave ratio (VSWR) is less than 2 when the characteristic impedance of transmission line at the terminal is 240Ω. Wide beam and approximately circular polarization characteristics are also observed. The simulation results demonstrate that the new kind of antenna has wide band radiation performances, which can be used in passive radars. Furthermore, the proposed antenna has simple structure and low cost, so it is suitable for mass fabrication.

Non-invasive detection and discrimination of breast tumors at early stage using spiral antenna

Frequenz ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Rukmani Singh ◽  
Vishnu Priye
Keyword(s):  
Early Stage ◽  
Low Cost ◽  
Breast Tumors ◽  
Tumor Location ◽  
Petroleum Jelly ◽  
Frequency Range ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Non Invasive ◽  
Full Wave

AbstractIn this paper, an Archimedean spiral antenna-based biosensor has been proposed for the early detection of breast tumor. By monitoring the variation of S11 over 1–3.5 GHz frequency range, the proposed scheme can identify the tumor location, as well as distinguish the types of tumor (benign or malignant) based on shapes and dielectric properties contrast. To validate the concept, full wave simulation using CST microwave suite are performed along with VNA based experimental measurements on breast phantoms and tumors, prepared by easily available materials like glass, petroleum jelly, mixture of water and wheat flour. The demonstrated device is able to detect the tumor of less than 1 mm in radius and positioned anywhere in 5 × 5 × 5 cm of breast fat. The proposed method is easy to use, low cost, safe, comfortable, non-invasive and non- ionizing in nature.

scholarly journals Enhanced Broadband RF Differential Rectifier Integrated with Archimedean Spiral Antenna for Wireless Energy Harvesting Applications

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 655 ◽  
Author(s):  
Mohamed Mansour ◽  
Xavier Le Polozec ◽  
Haruichi Kanaya
Keyword(s):  
Conversion Efficiency ◽  
High Efficiency ◽  
Load Resistance ◽  
Dipole Antenna ◽  
Input Power ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
5 Ghz

This work addresses the design and implementation of a broadband differential rectifier (DR) combined with an Archimedean spiral dipole antenna (ASDA) for wireless power harvesting at low incident power densities below 200 μ W/cm 2 . The proposed design exhibits an improved RF-DC conversion efficiency over a wide frequency range from 1.2 to 5 GHz. This frequency band is associated with several wireless communication services, for instance, ISM, WLAN, 5G, LTE, and GPS applications. The receiving planar ASDA exhibits circular polarization and has an average measured gain of 4.5 dBi from 1.2 to 5 GHz. To enable a wide operating bandwidth, the rectifier circuit is constituted by two architectures, designated A and B. Each scheme is designed to harvest power efficiently across a specific bandwidth. The optimal performance of both rectifiers are obtained using the nonlinear harmonic-balance simulations. The antenna–rectifier integration yields a compact rectenna with a high-efficiency performance over the intended bandwidth from 1.2 to 5 GHz for an input power of 9 dBm and terminal load resistance of 1 k Ω . The total measured RF-DC conversion efficiency is maintained above 30% across the entire frequency range with a peak value of 61% achieved at 1.2 GHz. In comparison with similar architectures, the proposed rectenna maintains a stable output efficiency despite the wide fluctuations in the input frequency and also has a minimum footprint size (58 × 55 mm 2 ).

Microwave wide band absorption by carbon from Corn cob-1

2016 ◽  
Vol 12 (2) ◽  
pp. 4204-4212 ◽  
Author(s):  
Maheshwar Sharon ◽  
Ritesh Vishwakarma ◽  
Abhijeet Rajendra Phatak ◽  
Golap Kalita ◽  
Nallin Sharma ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Agricultural Waste ◽  
Wide Band ◽  
Nickel Nitrate ◽  
Equivalent Amount ◽  
Frequency Range ◽  
Corn Cob ◽  
Different Temperatures ◽  
Band Absorption ◽  
5 Ghz

Corn cob, an agricultural waste, is paralyzed at different temperatures (700oC, 800oC and 900oC). Microwave absorption of carbon in the frequency range of 2 GHz to 8 GHz is reported. Carbon activated  with 5%  nickel nitrate showed more than 90% absorption of microwave in the frequency range from 6 GHz to 8 GHz, while carbon activated  with 10% Nickel nitrate treated corn cob showed 90% absorption  in the frequency range of 2.5 GHz to 5 GHz. Carbon showing the best absorption are characterized by XRD, Raman spectra and SEM . It is suggested that corn cob treatment   alone with KOH did not improve the microwave absorption, whereas treatment along with nickel nitrate improved the absorption property much better. It is proposed that treatment with nickel nitrate helps in creating suitable pores in carbon   which improved the absorption behavior because while treating carbon with 1N HCl helps to leach out nickel creating equivalent amount of pores in the carbon.

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.

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