Wideband Loaded Wire Bow-tie Antenna for Near Field Imaging Using Genetic Algorithms

Chung, Siau Wei Jonis; Abd‐Alhameed, Raed A.; See, Chan Hwang; Excell, Peter S.

doi:10.2529/piers080116072623

Cited by 5 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two antennas are connected to the ports of Vector Network Analyzer (VNA). The differential Gaussian pulse is adopted [37]:…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications

Zhu¹,

Gao²,

Ho³

et al. 2011

PIER

View full text Add to dashboard Cite

Abstract-A compact-size planar antenna with ultra-wideband (UWB) bandwidth and directional patterns is presented. The antenna can be fabricated on a printed circuit board (PCB). On one side of the PCB, it has a circular patch, and on the other side it has a slot-embedded ground plane with a fork-shaped feeding stub in the slot. Directional radiation is achieved by using a reflector below the antenna. To reduce the thickness of the antenna, a new low-profile antenna configuration is proposed. Three types of directional UWB antennas are analyzed. The distance between the antenna and the reflector is 12 mm (0.16λ 0 , λ 0 is the free space wavelength at the lowest frequency). In order to validate the design, a prototype is also fabricated and measured. Measured results agree well with the simulated ones. The measured results confirm that the proposed antenna features a reflection coefficient below −10 dB over the UWB range from 4.2 GHz to 8.5 GHz, a maximum gain around 9 dBi, a front-to-back ratio over 17 dB and pulse fidelity higher than 90% in the time domain. Thus it is promising for see-through-wall imaging applications.

show abstract

“…Two antennas are connected to the ports of Vector Network Analyzer (VNA). The differential Gaussian pulse is adopted [37]:…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications

Zhu¹,

Gao²,

Ho³

et al. 2011

PIER

View full text Add to dashboard Cite

show abstract

“…8. This result is obtained for two identical antennas with a distance of 20 cm in a face-to-face orientation and a UWB signal source (i.e., the differential Gaussian pulse) is adopted from the author's previous study in [24] as an excitation signal. A comparison of excited and received pulse signal is shown in Fig.…”

Section: Analysis In Time Domainmentioning

confidence: 99%

A Simple and Compact Planar Ultra Wideband Antenna With Single or Dual Band-Notched Characteristics

Zhou¹,

Gao²,

Zhu³

et al. 2012

PIER

Self Cite

View full text Add to dashboard Cite

Abstract-A printed monopole ultra wideband (UWB) antenna with frequency band-notched characteristics is proposed and investigated. The antenna consists of a half-disk shaped structure combined with an inverted isosceles trapezoid structure. To achieve the frequency band notched characteristics, an open-ended thin slit with a length of about one quarter guided wavelength is inserted on the radiator. Multiple slits can be employed to realize multiple frequency band notched characteristics. To validate the concept, two prototypes are designed, fabricated and tested. The first is a single band notched UWB antenna whereas the second is a dual band notched UWB antenna. The simulated and measured results of both antennas are presented shown a reasonable agreement between them. The results also confirm the proposed UWB antenna design can achieve superior dual band-notch performance at desired frequency bands.

show abstract

Medical image processing schemes for cancer detection: A survey

Velusamy

Karandharaj

2014

2014 International Conference on Green Computing Communication and Electrical Engineering (ICGCCEE)

View full text Add to dashboard Cite

In this paper, the survey has been proposed on -Medical Image processing schemes for cancer detection‖. The various intelligent schemes available in the literature for cancer detections have been discussed. This paper provides details of different techniques that reveal how hybrid intelligent approaches are applied to different categories of cancer detections and treatments. The three major categories of cancer problems such as breast, liver and brain tumor using cancer data bases are clearly discussed. The methods and algorithms used for detecting cancers are FPGA(Field Programmable Gate Array) based 3-D Ultrasound Computer Tomography(3D-USCT) with image reconstruction algorithms, a resistively loaded wire bowtie antenna using genetic algorithm approach, (111) In -pentetreotide Single-photon emission computed tomography(SPECT) based on Monte Carlo simulation and CA (Cellular Automata) Based Segmentation method. By reviewing all the methods available in the literature, it is found that each method has its own merits and demerits. This paper illustrates overview of various states of methods available in the cancer detection and comparison analysis of each method is discussed.

show abstract

Wideband Loaded Wire Bow-tie Antenna for Near Field Imaging Using Genetic Algorithms

Cited by 5 publications

References 6 publications

Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications

Low-Profile Directional Ultra-Wideband Antenna for See-Through-Wall Imaging Applications

A Simple and Compact Planar Ultra Wideband Antenna With Single or Dual Band-Notched Characteristics

Medical image processing schemes for cancer detection: A survey

Contact Info

Product

Resources

About